5 |
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*/ |
6 |
|
|
7 |
|
package java.util.concurrent; |
8 |
– |
import java.util.concurrent.ForkJoinPool; |
9 |
– |
import java.util.concurrent.CountedCompleter; |
10 |
– |
import java.util.function.*; |
11 |
– |
import java.util.Spliterator; |
12 |
– |
import java.util.stream.Stream; |
13 |
– |
import java.util.stream.Streams; |
8 |
|
|
9 |
< |
import java.util.Comparator; |
9 |
> |
import java.io.ObjectStreamField; |
10 |
> |
import java.io.Serializable; |
11 |
> |
import java.lang.reflect.ParameterizedType; |
12 |
> |
import java.lang.reflect.Type; |
13 |
> |
import java.util.AbstractMap; |
14 |
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import java.util.Arrays; |
17 |
– |
import java.util.Map; |
18 |
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import java.util.Set; |
15 |
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import java.util.Collection; |
16 |
< |
import java.util.AbstractMap; |
17 |
< |
import java.util.AbstractSet; |
22 |
< |
import java.util.AbstractCollection; |
23 |
< |
import java.util.Hashtable; |
16 |
> |
import java.util.Comparator; |
17 |
> |
import java.util.Enumeration; |
18 |
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import java.util.HashMap; |
19 |
+ |
import java.util.Hashtable; |
20 |
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import java.util.Iterator; |
21 |
< |
import java.util.Enumeration; |
27 |
< |
import java.util.ConcurrentModificationException; |
21 |
> |
import java.util.Map; |
22 |
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import java.util.NoSuchElementException; |
23 |
+ |
import java.util.Set; |
24 |
+ |
import java.util.Spliterator; |
25 |
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import java.util.concurrent.ConcurrentMap; |
26 |
< |
import java.util.concurrent.locks.AbstractQueuedSynchronizer; |
31 |
< |
import java.util.concurrent.atomic.AtomicInteger; |
26 |
> |
import java.util.concurrent.ForkJoinPool; |
27 |
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import java.util.concurrent.atomic.AtomicReference; |
28 |
< |
import java.io.Serializable; |
28 |
> |
import java.util.concurrent.locks.LockSupport; |
29 |
> |
import java.util.concurrent.locks.ReentrantLock; |
30 |
> |
import java.util.function.BiConsumer; |
31 |
> |
import java.util.function.BiFunction; |
32 |
> |
import java.util.function.BinaryOperator; |
33 |
> |
import java.util.function.Consumer; |
34 |
> |
import java.util.function.DoubleBinaryOperator; |
35 |
> |
import java.util.function.Function; |
36 |
> |
import java.util.function.IntBinaryOperator; |
37 |
> |
import java.util.function.LongBinaryOperator; |
38 |
> |
import java.util.function.ToDoubleBiFunction; |
39 |
> |
import java.util.function.ToDoubleFunction; |
40 |
> |
import java.util.function.ToIntBiFunction; |
41 |
> |
import java.util.function.ToIntFunction; |
42 |
> |
import java.util.function.ToLongBiFunction; |
43 |
> |
import java.util.function.ToLongFunction; |
44 |
> |
import java.util.stream.Stream; |
45 |
|
|
46 |
|
/** |
47 |
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* A hash table supporting full concurrency of retrievals and |
64 |
|
* that key reporting the updated value.) For aggregate operations |
65 |
|
* such as {@code putAll} and {@code clear}, concurrent retrievals may |
66 |
|
* reflect insertion or removal of only some entries. Similarly, |
67 |
< |
* Iterators and Enumerations return elements reflecting the state of |
68 |
< |
* the hash table at some point at or since the creation of the |
67 |
> |
* Iterators, Spliterators and Enumerations return elements reflecting the |
68 |
> |
* state of the hash table at some point at or since the creation of the |
69 |
|
* iterator/enumeration. They do <em>not</em> throw {@link |
70 |
< |
* ConcurrentModificationException}. However, iterators are designed |
71 |
< |
* to be used by only one thread at a time. Bear in mind that the |
72 |
< |
* results of aggregate status methods including {@code size}, {@code |
73 |
< |
* isEmpty}, and {@code containsValue} are typically useful only when |
74 |
< |
* a map is not undergoing concurrent updates in other threads. |
70 |
> |
* java.util.ConcurrentModificationException ConcurrentModificationException}. |
71 |
> |
* However, iterators are designed to be used by only one thread at a time. |
72 |
> |
* Bear in mind that the results of aggregate status methods including |
73 |
> |
* {@code size}, {@code isEmpty}, and {@code containsValue} are typically |
74 |
> |
* useful only when a map is not undergoing concurrent updates in other threads. |
75 |
|
* Otherwise the results of these methods reflect transient states |
76 |
|
* that may be adequate for monitoring or estimation purposes, but not |
77 |
|
* for program control. |
95 |
|
* expected {@code concurrencyLevel} as an additional hint for |
96 |
|
* internal sizing. Note that using many keys with exactly the same |
97 |
|
* {@code hashCode()} is a sure way to slow down performance of any |
98 |
< |
* hash table. |
98 |
> |
* hash table. To ameliorate impact, when keys are {@link Comparable}, |
99 |
> |
* this class may use comparison order among keys to help break ties. |
100 |
|
* |
101 |
|
* <p>A {@link Set} projection of a ConcurrentHashMap may be created |
102 |
|
* (using {@link #newKeySet()} or {@link #newKeySet(int)}), or viewed |
118 |
|
* <p>Like {@link Hashtable} but unlike {@link HashMap}, this class |
119 |
|
* does <em>not</em> allow {@code null} to be used as a key or value. |
120 |
|
* |
121 |
< |
* <p>ConcurrentHashMaps support sequential and parallel operations |
122 |
< |
* bulk operations. (Parallel forms use the {@link |
123 |
< |
* ForkJoinPool#commonPool()}). Tasks that may be used in other |
124 |
< |
* contexts are available in class {@link ForkJoinTasks}. These |
125 |
< |
* operations are designed to be safely, and often sensibly, applied |
126 |
< |
* even with maps that are being concurrently updated by other |
127 |
< |
* threads; for example, when computing a snapshot summary of the |
128 |
< |
* values in a shared registry. There are three kinds of operation, |
129 |
< |
* each with four forms, accepting functions with Keys, Values, |
130 |
< |
* Entries, and (Key, Value) arguments and/or return values. Because |
131 |
< |
* the elements of a ConcurrentHashMap are not ordered in any |
132 |
< |
* particular way, and may be processed in different orders in |
133 |
< |
* different parallel executions, the correctness of supplied |
134 |
< |
* functions should not depend on any ordering, or on any other |
135 |
< |
* objects or values that may transiently change while computation is |
124 |
< |
* in progress; and except for forEach actions, should ideally be |
125 |
< |
* side-effect-free. |
121 |
> |
* <p>ConcurrentHashMaps support a set of sequential and parallel bulk |
122 |
> |
* operations that, unlike most {@link Stream} methods, are designed |
123 |
> |
* to be safely, and often sensibly, applied even with maps that are |
124 |
> |
* being concurrently updated by other threads; for example, when |
125 |
> |
* computing a snapshot summary of the values in a shared registry. |
126 |
> |
* There are three kinds of operation, each with four forms, accepting |
127 |
> |
* functions with Keys, Values, Entries, and (Key, Value) arguments |
128 |
> |
* and/or return values. Because the elements of a ConcurrentHashMap |
129 |
> |
* are not ordered in any particular way, and may be processed in |
130 |
> |
* different orders in different parallel executions, the correctness |
131 |
> |
* of supplied functions should not depend on any ordering, or on any |
132 |
> |
* other objects or values that may transiently change while |
133 |
> |
* computation is in progress; and except for forEach actions, should |
134 |
> |
* ideally be side-effect-free. Bulk operations on {@link java.util.Map.Entry} |
135 |
> |
* objects do not support method {@code setValue}. |
136 |
|
* |
137 |
|
* <ul> |
138 |
|
* <li> forEach: Perform a given action on each element. |
163 |
|
* </li> |
164 |
|
* </ul> |
165 |
|
* |
166 |
+ |
* <p>These bulk operations accept a {@code parallelismThreshold} |
167 |
+ |
* argument. Methods proceed sequentially if the current map size is |
168 |
+ |
* estimated to be less than the given threshold. Using a value of |
169 |
+ |
* {@code Long.MAX_VALUE} suppresses all parallelism. Using a value |
170 |
+ |
* of {@code 1} results in maximal parallelism by partitioning into |
171 |
+ |
* enough subtasks to fully utilize the {@link |
172 |
+ |
* ForkJoinPool#commonPool()} that is used for all parallel |
173 |
+ |
* computations. Normally, you would initially choose one of these |
174 |
+ |
* extreme values, and then measure performance of using in-between |
175 |
+ |
* values that trade off overhead versus throughput. |
176 |
+ |
* |
177 |
|
* <p>The concurrency properties of bulk operations follow |
178 |
|
* from those of ConcurrentHashMap: Any non-null result returned |
179 |
|
* from {@code get(key)} and related access methods bears a |
235 |
|
* @param <K> the type of keys maintained by this map |
236 |
|
* @param <V> the type of mapped values |
237 |
|
*/ |
238 |
< |
public class ConcurrentHashMap<K,V> |
238 |
> |
public class ConcurrentHashMap<K,V> extends AbstractMap<K,V> |
239 |
|
implements ConcurrentMap<K,V>, Serializable { |
240 |
|
private static final long serialVersionUID = 7249069246763182397L; |
241 |
|
|
249 |
|
* the same or better than java.util.HashMap, and to support high |
250 |
|
* initial insertion rates on an empty table by many threads. |
251 |
|
* |
252 |
< |
* Each key-value mapping is held in a Node. Because Node key |
253 |
< |
* fields can contain special values, they are defined using plain |
254 |
< |
* Object types (not type "K"). This leads to a lot of explicit |
255 |
< |
* casting (and many explicit warning suppressions to tell |
256 |
< |
* compilers not to complain about it). It also allows some of the |
257 |
< |
* public methods to be factored into a smaller number of internal |
258 |
< |
* methods (although sadly not so for the five variants of |
259 |
< |
* put-related operations). The validation-based approach |
260 |
< |
* explained below leads to a lot of code sprawl because |
261 |
< |
* retry-control precludes factoring into smaller methods. |
252 |
> |
* This map usually acts as a binned (bucketed) hash table. Each |
253 |
> |
* key-value mapping is held in a Node. Most nodes are instances |
254 |
> |
* of the basic Node class with hash, key, value, and next |
255 |
> |
* fields. However, various subclasses exist: TreeNodes are |
256 |
> |
* arranged in balanced trees, not lists. TreeBins hold the roots |
257 |
> |
* of sets of TreeNodes. ForwardingNodes are placed at the heads |
258 |
> |
* of bins during resizing. ReservationNodes are used as |
259 |
> |
* placeholders while establishing values in computeIfAbsent and |
260 |
> |
* related methods. The types TreeBin, ForwardingNode, and |
261 |
> |
* ReservationNode do not hold normal user keys, values, or |
262 |
> |
* hashes, and are readily distinguishable during search etc |
263 |
> |
* because they have negative hash fields and null key and value |
264 |
> |
* fields. (These special nodes are either uncommon or transient, |
265 |
> |
* so the impact of carrying around some unused fields is |
266 |
> |
* insignificant.) |
267 |
|
* |
268 |
|
* The table is lazily initialized to a power-of-two size upon the |
269 |
|
* first insertion. Each bin in the table normally contains a |
271 |
|
* Table accesses require volatile/atomic reads, writes, and |
272 |
|
* CASes. Because there is no other way to arrange this without |
273 |
|
* adding further indirections, we use intrinsics |
274 |
< |
* (sun.misc.Unsafe) operations. The lists of nodes within bins |
249 |
< |
* are always accurately traversable under volatile reads, so long |
250 |
< |
* as lookups check hash code and non-nullness of value before |
251 |
< |
* checking key equality. |
274 |
> |
* (sun.misc.Unsafe) operations. |
275 |
|
* |
276 |
|
* We use the top (sign) bit of Node hash fields for control |
277 |
|
* purposes -- it is available anyway because of addressing |
278 |
< |
* constraints. Nodes with negative hash fields are forwarding |
279 |
< |
* nodes to either TreeBins or resized tables. The lower 31 bits |
257 |
< |
* of each normal Node's hash field contain a transformation of |
258 |
< |
* the key's hash code. |
278 |
> |
* constraints. Nodes with negative hash fields are specially |
279 |
> |
* handled or ignored in map methods. |
280 |
|
* |
281 |
|
* Insertion (via put or its variants) of the first node in an |
282 |
|
* empty bin is performed by just CASing it to the bin. This is |
293 |
|
* validate that it is still the first node after locking it, and |
294 |
|
* retry if not. Because new nodes are always appended to lists, |
295 |
|
* once a node is first in a bin, it remains first until deleted |
296 |
< |
* or the bin becomes invalidated (upon resizing). However, |
276 |
< |
* operations that only conditionally update may inspect nodes |
277 |
< |
* until the point of update. This is a converse of sorts to the |
278 |
< |
* lazy locking technique described by Herlihy & Shavit. |
296 |
> |
* or the bin becomes invalidated (upon resizing). |
297 |
|
* |
298 |
|
* The main disadvantage of per-bin locks is that other update |
299 |
|
* operations on other nodes in a bin list protected by the same |
326 |
|
* sometimes deviate significantly from uniform randomness. This |
327 |
|
* includes the case when N > (1<<30), so some keys MUST collide. |
328 |
|
* Similarly for dumb or hostile usages in which multiple keys are |
329 |
< |
* designed to have identical hash codes. Also, although we guard |
330 |
< |
* against the worst effects of this (see method spread), sets of |
331 |
< |
* hashes may differ only in bits that do not impact their bin |
332 |
< |
* index for a given power-of-two mask. So we use a secondary |
333 |
< |
* strategy that applies when the number of nodes in a bin exceeds |
334 |
< |
* a threshold, and at least one of the keys implements |
317 |
< |
* Comparable. These TreeBins use a balanced tree to hold nodes |
318 |
< |
* (a specialized form of red-black trees), bounding search time |
319 |
< |
* to O(log N). Each search step in a TreeBin is around twice as |
329 |
> |
* designed to have identical hash codes or ones that differs only |
330 |
> |
* in masked-out high bits. So we use a secondary strategy that |
331 |
> |
* applies when the number of nodes in a bin exceeds a |
332 |
> |
* threshold. These TreeBins use a balanced tree to hold nodes (a |
333 |
> |
* specialized form of red-black trees), bounding search time to |
334 |
> |
* O(log N). Each search step in a TreeBin is at least twice as |
335 |
|
* slow as in a regular list, but given that N cannot exceed |
336 |
|
* (1<<64) (before running out of addresses) this bounds search |
337 |
|
* steps, lock hold times, etc, to reasonable constants (roughly |
344 |
|
* The table is resized when occupancy exceeds a percentage |
345 |
|
* threshold (nominally, 0.75, but see below). Any thread |
346 |
|
* noticing an overfull bin may assist in resizing after the |
347 |
< |
* initiating thread allocates and sets up the replacement |
348 |
< |
* array. However, rather than stalling, these other threads may |
349 |
< |
* proceed with insertions etc. The use of TreeBins shields us |
350 |
< |
* from the worst case effects of overfilling while resizes are in |
347 |
> |
* initiating thread allocates and sets up the replacement array. |
348 |
> |
* However, rather than stalling, these other threads may proceed |
349 |
> |
* with insertions etc. The use of TreeBins shields us from the |
350 |
> |
* worst case effects of overfilling while resizes are in |
351 |
|
* progress. Resizing proceeds by transferring bins, one by one, |
352 |
< |
* from the table to the next table. To enable concurrency, the |
353 |
< |
* next table must be (incrementally) prefilled with place-holders |
354 |
< |
* serving as reverse forwarders to the old table. Because we are |
352 |
> |
* from the table to the next table. However, threads claim small |
353 |
> |
* blocks of indices to transfer (via field transferIndex) before |
354 |
> |
* doing so, reducing contention. A generation stamp in field |
355 |
> |
* sizeCtl ensures that resizings do not overlap. Because we are |
356 |
|
* using power-of-two expansion, the elements from each bin must |
357 |
|
* either stay at same index, or move with a power of two |
358 |
|
* offset. We eliminate unnecessary node creation by catching |
373 |
|
* locks, average aggregate waits become shorter as resizing |
374 |
|
* progresses. The transfer operation must also ensure that all |
375 |
|
* accessible bins in both the old and new table are usable by any |
376 |
< |
* traversal. This is arranged by proceeding from the last bin |
377 |
< |
* (table.length - 1) up towards the first. Upon seeing a |
378 |
< |
* forwarding node, traversals (see class Traverser) arrange to |
379 |
< |
* move to the new table without revisiting nodes. However, to |
380 |
< |
* ensure that no intervening nodes are skipped, bin splitting can |
381 |
< |
* only begin after the associated reverse-forwarders are in |
382 |
< |
* place. |
376 |
> |
* traversal. This is arranged in part by proceeding from the |
377 |
> |
* last bin (table.length - 1) up towards the first. Upon seeing |
378 |
> |
* a forwarding node, traversals (see class Traverser) arrange to |
379 |
> |
* move to the new table without revisiting nodes. To ensure that |
380 |
> |
* no intervening nodes are skipped even when moved out of order, |
381 |
> |
* a stack (see class TableStack) is created on first encounter of |
382 |
> |
* a forwarding node during a traversal, to maintain its place if |
383 |
> |
* later processing the current table. The need for these |
384 |
> |
* save/restore mechanics is relatively rare, but when one |
385 |
> |
* forwarding node is encountered, typically many more will be. |
386 |
> |
* So Traversers use a simple caching scheme to avoid creating so |
387 |
> |
* many new TableStack nodes. (Thanks to Peter Levart for |
388 |
> |
* suggesting use of a stack here.) |
389 |
|
* |
390 |
|
* The traversal scheme also applies to partial traversals of |
391 |
|
* ranges of bins (via an alternate Traverser constructor) |
404 |
|
* LongAdder. We need to incorporate a specialization rather than |
405 |
|
* just use a LongAdder in order to access implicit |
406 |
|
* contention-sensing that leads to creation of multiple |
407 |
< |
* Cells. The counter mechanics avoid contention on |
407 |
> |
* CounterCells. The counter mechanics avoid contention on |
408 |
|
* updates but can encounter cache thrashing if read too |
409 |
|
* frequently during concurrent access. To avoid reading so often, |
410 |
|
* resizing under contention is attempted only upon adding to a |
411 |
|
* bin already holding two or more nodes. Under uniform hash |
412 |
|
* distributions, the probability of this occurring at threshold |
413 |
|
* is around 13%, meaning that only about 1 in 8 puts check |
414 |
< |
* threshold (and after resizing, many fewer do so). The bulk |
415 |
< |
* putAll operation further reduces contention by only committing |
416 |
< |
* count updates upon these size checks. |
414 |
> |
* threshold (and after resizing, many fewer do so). |
415 |
> |
* |
416 |
> |
* TreeBins use a special form of comparison for search and |
417 |
> |
* related operations (which is the main reason we cannot use |
418 |
> |
* existing collections such as TreeMaps). TreeBins contain |
419 |
> |
* Comparable elements, but may contain others, as well as |
420 |
> |
* elements that are Comparable but not necessarily Comparable for |
421 |
> |
* the same T, so we cannot invoke compareTo among them. To handle |
422 |
> |
* this, the tree is ordered primarily by hash value, then by |
423 |
> |
* Comparable.compareTo order if applicable. On lookup at a node, |
424 |
> |
* if elements are not comparable or compare as 0 then both left |
425 |
> |
* and right children may need to be searched in the case of tied |
426 |
> |
* hash values. (This corresponds to the full list search that |
427 |
> |
* would be necessary if all elements were non-Comparable and had |
428 |
> |
* tied hashes.) On insertion, to keep a total ordering (or as |
429 |
> |
* close as is required here) across rebalancings, we compare |
430 |
> |
* classes and identityHashCodes as tie-breakers. The red-black |
431 |
> |
* balancing code is updated from pre-jdk-collections |
432 |
> |
* (http://gee.cs.oswego.edu/dl/classes/collections/RBCell.java) |
433 |
> |
* based in turn on Cormen, Leiserson, and Rivest "Introduction to |
434 |
> |
* Algorithms" (CLR). |
435 |
> |
* |
436 |
> |
* TreeBins also require an additional locking mechanism. While |
437 |
> |
* list traversal is always possible by readers even during |
438 |
> |
* updates, tree traversal is not, mainly because of tree-rotations |
439 |
> |
* that may change the root node and/or its linkages. TreeBins |
440 |
> |
* include a simple read-write lock mechanism parasitic on the |
441 |
> |
* main bin-synchronization strategy: Structural adjustments |
442 |
> |
* associated with an insertion or removal are already bin-locked |
443 |
> |
* (and so cannot conflict with other writers) but must wait for |
444 |
> |
* ongoing readers to finish. Since there can be only one such |
445 |
> |
* waiter, we use a simple scheme using a single "waiter" field to |
446 |
> |
* block writers. However, readers need never block. If the root |
447 |
> |
* lock is held, they proceed along the slow traversal path (via |
448 |
> |
* next-pointers) until the lock becomes available or the list is |
449 |
> |
* exhausted, whichever comes first. These cases are not fast, but |
450 |
> |
* maximize aggregate expected throughput. |
451 |
|
* |
452 |
|
* Maintaining API and serialization compatibility with previous |
453 |
|
* versions of this class introduces several oddities. Mainly: We |
457 |
|
* time that we can guarantee to honor it.) We also declare an |
458 |
|
* unused "Segment" class that is instantiated in minimal form |
459 |
|
* only when serializing. |
460 |
+ |
* |
461 |
+ |
* Also, solely for compatibility with previous versions of this |
462 |
+ |
* class, it extends AbstractMap, even though all of its methods |
463 |
+ |
* are overridden, so it is just useless baggage. |
464 |
+ |
* |
465 |
+ |
* This file is organized to make things a little easier to follow |
466 |
+ |
* while reading than they might otherwise: First the main static |
467 |
+ |
* declarations and utilities, then fields, then main public |
468 |
+ |
* methods (with a few factorings of multiple public methods into |
469 |
+ |
* internal ones), then sizing methods, trees, traversers, and |
470 |
+ |
* bulk operations. |
471 |
|
*/ |
472 |
|
|
473 |
|
/* ---------------- Constants -------------- */ |
510 |
|
|
511 |
|
/** |
512 |
|
* The bin count threshold for using a tree rather than list for a |
513 |
< |
* bin. The value reflects the approximate break-even point for |
514 |
< |
* using tree-based operations. |
513 |
> |
* bin. Bins are converted to trees when adding an element to a |
514 |
> |
* bin with at least this many nodes. The value must be greater |
515 |
> |
* than 2, and should be at least 8 to mesh with assumptions in |
516 |
> |
* tree removal about conversion back to plain bins upon |
517 |
> |
* shrinkage. |
518 |
> |
*/ |
519 |
> |
static final int TREEIFY_THRESHOLD = 8; |
520 |
> |
|
521 |
> |
/** |
522 |
> |
* The bin count threshold for untreeifying a (split) bin during a |
523 |
> |
* resize operation. Should be less than TREEIFY_THRESHOLD, and at |
524 |
> |
* most 6 to mesh with shrinkage detection under removal. |
525 |
> |
*/ |
526 |
> |
static final int UNTREEIFY_THRESHOLD = 6; |
527 |
> |
|
528 |
> |
/** |
529 |
> |
* The smallest table capacity for which bins may be treeified. |
530 |
> |
* (Otherwise the table is resized if too many nodes in a bin.) |
531 |
> |
* The value should be at least 4 * TREEIFY_THRESHOLD to avoid |
532 |
> |
* conflicts between resizing and treeification thresholds. |
533 |
|
*/ |
534 |
< |
private static final int TREE_THRESHOLD = 8; |
534 |
> |
static final int MIN_TREEIFY_CAPACITY = 64; |
535 |
|
|
536 |
|
/** |
537 |
|
* Minimum number of rebinnings per transfer step. Ranges are |
542 |
|
*/ |
543 |
|
private static final int MIN_TRANSFER_STRIDE = 16; |
544 |
|
|
545 |
+ |
/** |
546 |
+ |
* The number of bits used for generation stamp in sizeCtl. |
547 |
+ |
* Must be at least 6 for 32bit arrays. |
548 |
+ |
*/ |
549 |
+ |
private static int RESIZE_STAMP_BITS = 16; |
550 |
+ |
|
551 |
+ |
/** |
552 |
+ |
* The maximum number of threads that can help resize. |
553 |
+ |
* Must fit in 32 - RESIZE_STAMP_BITS bits. |
554 |
+ |
*/ |
555 |
+ |
private static final int MAX_RESIZERS = (1 << (32 - RESIZE_STAMP_BITS)) - 1; |
556 |
+ |
|
557 |
+ |
/** |
558 |
+ |
* The bit shift for recording size stamp in sizeCtl. |
559 |
+ |
*/ |
560 |
+ |
private static final int RESIZE_STAMP_SHIFT = 32 - RESIZE_STAMP_BITS; |
561 |
+ |
|
562 |
|
/* |
563 |
|
* Encodings for Node hash fields. See above for explanation. |
564 |
|
*/ |
565 |
< |
static final int MOVED = 0x80000000; // hash field for forwarding nodes |
565 |
> |
static final int MOVED = -1; // hash for forwarding nodes |
566 |
> |
static final int TREEBIN = -2; // hash for roots of trees |
567 |
> |
static final int RESERVED = -3; // hash for transient reservations |
568 |
|
static final int HASH_BITS = 0x7fffffff; // usable bits of normal node hash |
569 |
|
|
570 |
|
/** Number of CPUS, to place bounds on some sizings */ |
571 |
|
static final int NCPU = Runtime.getRuntime().availableProcessors(); |
572 |
|
|
573 |
< |
/* ---------------- Counters -------------- */ |
573 |
> |
/** For serialization compatibility. */ |
574 |
> |
private static final ObjectStreamField[] serialPersistentFields = { |
575 |
> |
new ObjectStreamField("segments", Segment[].class), |
576 |
> |
new ObjectStreamField("segmentMask", Integer.TYPE), |
577 |
> |
new ObjectStreamField("segmentShift", Integer.TYPE) |
578 |
> |
}; |
579 |
|
|
580 |
< |
// Adapted from LongAdder and Striped64. |
472 |
< |
// See their internal docs for explanation. |
580 |
> |
/* ---------------- Nodes -------------- */ |
581 |
|
|
582 |
< |
// A padded cell for distributing counts |
583 |
< |
static final class Cell { |
584 |
< |
volatile long p0, p1, p2, p3, p4, p5, p6; |
585 |
< |
volatile long value; |
586 |
< |
volatile long q0, q1, q2, q3, q4, q5, q6; |
587 |
< |
Cell(long x) { value = x; } |
582 |
> |
/** |
583 |
> |
* Key-value entry. This class is never exported out as a |
584 |
> |
* user-mutable Map.Entry (i.e., one supporting setValue; see |
585 |
> |
* MapEntry below), but can be used for read-only traversals used |
586 |
> |
* in bulk tasks. Subclasses of Node with a negative hash field |
587 |
> |
* are special, and contain null keys and values (but are never |
588 |
> |
* exported). Otherwise, keys and vals are never null. |
589 |
> |
*/ |
590 |
> |
static class Node<K,V> implements Map.Entry<K,V> { |
591 |
> |
final int hash; |
592 |
> |
final K key; |
593 |
> |
volatile V val; |
594 |
> |
volatile Node<K,V> next; |
595 |
> |
|
596 |
> |
Node(int hash, K key, V val, Node<K,V> next) { |
597 |
> |
this.hash = hash; |
598 |
> |
this.key = key; |
599 |
> |
this.val = val; |
600 |
> |
this.next = next; |
601 |
> |
} |
602 |
> |
|
603 |
> |
public final K getKey() { return key; } |
604 |
> |
public final V getValue() { return val; } |
605 |
> |
public final int hashCode() { return key.hashCode() ^ val.hashCode(); } |
606 |
> |
public final String toString(){ return key + "=" + val; } |
607 |
> |
public final V setValue(V value) { |
608 |
> |
throw new UnsupportedOperationException(); |
609 |
> |
} |
610 |
> |
|
611 |
> |
public final boolean equals(Object o) { |
612 |
> |
Object k, v, u; Map.Entry<?,?> e; |
613 |
> |
return ((o instanceof Map.Entry) && |
614 |
> |
(k = (e = (Map.Entry<?,?>)o).getKey()) != null && |
615 |
> |
(v = e.getValue()) != null && |
616 |
> |
(k == key || k.equals(key)) && |
617 |
> |
(v == (u = val) || v.equals(u))); |
618 |
> |
} |
619 |
> |
|
620 |
> |
/** |
621 |
> |
* Virtualized support for map.get(); overridden in subclasses. |
622 |
> |
*/ |
623 |
> |
Node<K,V> find(int h, Object k) { |
624 |
> |
Node<K,V> e = this; |
625 |
> |
if (k != null) { |
626 |
> |
do { |
627 |
> |
K ek; |
628 |
> |
if (e.hash == h && |
629 |
> |
((ek = e.key) == k || (ek != null && k.equals(ek)))) |
630 |
> |
return e; |
631 |
> |
} while ((e = e.next) != null); |
632 |
> |
} |
633 |
> |
return null; |
634 |
> |
} |
635 |
> |
} |
636 |
> |
|
637 |
> |
/* ---------------- Static utilities -------------- */ |
638 |
> |
|
639 |
> |
/** |
640 |
> |
* Spreads (XORs) higher bits of hash to lower and also forces top |
641 |
> |
* bit to 0. Because the table uses power-of-two masking, sets of |
642 |
> |
* hashes that vary only in bits above the current mask will |
643 |
> |
* always collide. (Among known examples are sets of Float keys |
644 |
> |
* holding consecutive whole numbers in small tables.) So we |
645 |
> |
* apply a transform that spreads the impact of higher bits |
646 |
> |
* downward. There is a tradeoff between speed, utility, and |
647 |
> |
* quality of bit-spreading. Because many common sets of hashes |
648 |
> |
* are already reasonably distributed (so don't benefit from |
649 |
> |
* spreading), and because we use trees to handle large sets of |
650 |
> |
* collisions in bins, we just XOR some shifted bits in the |
651 |
> |
* cheapest possible way to reduce systematic lossage, as well as |
652 |
> |
* to incorporate impact of the highest bits that would otherwise |
653 |
> |
* never be used in index calculations because of table bounds. |
654 |
> |
*/ |
655 |
> |
static final int spread(int h) { |
656 |
> |
return (h ^ (h >>> 16)) & HASH_BITS; |
657 |
> |
} |
658 |
> |
|
659 |
> |
/** |
660 |
> |
* Returns a power of two table size for the given desired capacity. |
661 |
> |
* See Hackers Delight, sec 3.2 |
662 |
> |
*/ |
663 |
> |
private static final int tableSizeFor(int c) { |
664 |
> |
int n = c - 1; |
665 |
> |
n |= n >>> 1; |
666 |
> |
n |= n >>> 2; |
667 |
> |
n |= n >>> 4; |
668 |
> |
n |= n >>> 8; |
669 |
> |
n |= n >>> 16; |
670 |
> |
return (n < 0) ? 1 : (n >= MAXIMUM_CAPACITY) ? MAXIMUM_CAPACITY : n + 1; |
671 |
> |
} |
672 |
> |
|
673 |
> |
/** |
674 |
> |
* Returns x's Class if it is of the form "class C implements |
675 |
> |
* Comparable<C>", else null. |
676 |
> |
*/ |
677 |
> |
static Class<?> comparableClassFor(Object x) { |
678 |
> |
if (x instanceof Comparable) { |
679 |
> |
Class<?> c; Type[] ts, as; Type t; ParameterizedType p; |
680 |
> |
if ((c = x.getClass()) == String.class) // bypass checks |
681 |
> |
return c; |
682 |
> |
if ((ts = c.getGenericInterfaces()) != null) { |
683 |
> |
for (int i = 0; i < ts.length; ++i) { |
684 |
> |
if (((t = ts[i]) instanceof ParameterizedType) && |
685 |
> |
((p = (ParameterizedType)t).getRawType() == |
686 |
> |
Comparable.class) && |
687 |
> |
(as = p.getActualTypeArguments()) != null && |
688 |
> |
as.length == 1 && as[0] == c) // type arg is c |
689 |
> |
return c; |
690 |
> |
} |
691 |
> |
} |
692 |
> |
} |
693 |
> |
return null; |
694 |
> |
} |
695 |
> |
|
696 |
> |
/** |
697 |
> |
* Returns k.compareTo(x) if x matches kc (k's screened comparable |
698 |
> |
* class), else 0. |
699 |
> |
*/ |
700 |
> |
@SuppressWarnings({"rawtypes","unchecked"}) // for cast to Comparable |
701 |
> |
static int compareComparables(Class<?> kc, Object k, Object x) { |
702 |
> |
return (x == null || x.getClass() != kc ? 0 : |
703 |
> |
((Comparable)k).compareTo(x)); |
704 |
> |
} |
705 |
> |
|
706 |
> |
/* ---------------- Table element access -------------- */ |
707 |
> |
|
708 |
> |
/* |
709 |
> |
* Volatile access methods are used for table elements as well as |
710 |
> |
* elements of in-progress next table while resizing. All uses of |
711 |
> |
* the tab arguments must be null checked by callers. All callers |
712 |
> |
* also paranoically precheck that tab's length is not zero (or an |
713 |
> |
* equivalent check), thus ensuring that any index argument taking |
714 |
> |
* the form of a hash value anded with (length - 1) is a valid |
715 |
> |
* index. Note that, to be correct wrt arbitrary concurrency |
716 |
> |
* errors by users, these checks must operate on local variables, |
717 |
> |
* which accounts for some odd-looking inline assignments below. |
718 |
> |
* Note that calls to setTabAt always occur within locked regions, |
719 |
> |
* and so in principle require only release ordering, not |
720 |
> |
* full volatile semantics, but are currently coded as volatile |
721 |
> |
* writes to be conservative. |
722 |
> |
*/ |
723 |
> |
|
724 |
> |
@SuppressWarnings("unchecked") |
725 |
> |
static final <K,V> Node<K,V> tabAt(Node<K,V>[] tab, int i) { |
726 |
> |
return (Node<K,V>)U.getObjectVolatile(tab, ((long)i << ASHIFT) + ABASE); |
727 |
> |
} |
728 |
> |
|
729 |
> |
static final <K,V> boolean casTabAt(Node<K,V>[] tab, int i, |
730 |
> |
Node<K,V> c, Node<K,V> v) { |
731 |
> |
return U.compareAndSwapObject(tab, ((long)i << ASHIFT) + ABASE, c, v); |
732 |
> |
} |
733 |
> |
|
734 |
> |
static final <K,V> void setTabAt(Node<K,V>[] tab, int i, Node<K,V> v) { |
735 |
> |
U.putObjectVolatile(tab, ((long)i << ASHIFT) + ABASE, v); |
736 |
|
} |
737 |
|
|
738 |
|
/* ---------------- Fields -------------- */ |
741 |
|
* The array of bins. Lazily initialized upon first insertion. |
742 |
|
* Size is always a power of two. Accessed directly by iterators. |
743 |
|
*/ |
744 |
< |
transient volatile Node<V>[] table; |
744 |
> |
transient volatile Node<K,V>[] table; |
745 |
|
|
746 |
|
/** |
747 |
|
* The next table to use; non-null only while resizing. |
748 |
|
*/ |
749 |
< |
private transient volatile Node<V>[] nextTable; |
749 |
> |
private transient volatile Node<K,V>[] nextTable; |
750 |
|
|
751 |
|
/** |
752 |
|
* Base counter value, used mainly when there is no contention, |
771 |
|
private transient volatile int transferIndex; |
772 |
|
|
773 |
|
/** |
774 |
< |
* The least available table index to split while resizing. |
519 |
< |
*/ |
520 |
< |
private transient volatile int transferOrigin; |
521 |
< |
|
522 |
< |
/** |
523 |
< |
* Spinlock (locked via CAS) used when resizing and/or creating Cells. |
774 |
> |
* Spinlock (locked via CAS) used when resizing and/or creating CounterCells. |
775 |
|
*/ |
776 |
|
private transient volatile int cellsBusy; |
777 |
|
|
778 |
|
/** |
779 |
|
* Table of counter cells. When non-null, size is a power of 2. |
780 |
|
*/ |
781 |
< |
private transient volatile Cell[] counterCells; |
781 |
> |
private transient volatile CounterCell[] counterCells; |
782 |
|
|
783 |
|
// views |
784 |
|
private transient KeySetView<K,V> keySet; |
785 |
|
private transient ValuesView<K,V> values; |
786 |
|
private transient EntrySetView<K,V> entrySet; |
787 |
|
|
537 |
– |
/** For serialization compatibility. Null unless serialized; see below */ |
538 |
– |
private Segment<K,V>[] segments; |
788 |
|
|
789 |
< |
/* ---------------- Table element access -------------- */ |
789 |
> |
/* ---------------- Public operations -------------- */ |
790 |
|
|
791 |
< |
/* |
792 |
< |
* Volatile access methods are used for table elements as well as |
793 |
< |
* elements of in-progress next table while resizing. Uses are |
794 |
< |
* null checked by callers, and implicitly bounds-checked, relying |
546 |
< |
* on the invariants that tab arrays have non-zero size, and all |
547 |
< |
* indices are masked with (tab.length - 1) which is never |
548 |
< |
* negative and always less than length. Note that, to be correct |
549 |
< |
* wrt arbitrary concurrency errors by users, bounds checks must |
550 |
< |
* operate on local variables, which accounts for some odd-looking |
551 |
< |
* inline assignments below. |
552 |
< |
*/ |
553 |
< |
|
554 |
< |
@SuppressWarnings("unchecked") static final <V> Node<V> tabAt |
555 |
< |
(Node<V>[] tab, int i) { // used by Traverser |
556 |
< |
return (Node<V>)U.getObjectVolatile(tab, ((long)i << ASHIFT) + ABASE); |
791 |
> |
/** |
792 |
> |
* Creates a new, empty map with the default initial table size (16). |
793 |
> |
*/ |
794 |
> |
public ConcurrentHashMap() { |
795 |
|
} |
796 |
|
|
797 |
< |
private static final <V> boolean casTabAt |
798 |
< |
(Node<V>[] tab, int i, Node<V> c, Node<V> v) { |
799 |
< |
return U.compareAndSwapObject(tab, ((long)i << ASHIFT) + ABASE, c, v); |
797 |
> |
/** |
798 |
> |
* Creates a new, empty map with an initial table size |
799 |
> |
* accommodating the specified number of elements without the need |
800 |
> |
* to dynamically resize. |
801 |
> |
* |
802 |
> |
* @param initialCapacity The implementation performs internal |
803 |
> |
* sizing to accommodate this many elements. |
804 |
> |
* @throws IllegalArgumentException if the initial capacity of |
805 |
> |
* elements is negative |
806 |
> |
*/ |
807 |
> |
public ConcurrentHashMap(int initialCapacity) { |
808 |
> |
if (initialCapacity < 0) |
809 |
> |
throw new IllegalArgumentException(); |
810 |
> |
int cap = ((initialCapacity >= (MAXIMUM_CAPACITY >>> 1)) ? |
811 |
> |
MAXIMUM_CAPACITY : |
812 |
> |
tableSizeFor(initialCapacity + (initialCapacity >>> 1) + 1)); |
813 |
> |
this.sizeCtl = cap; |
814 |
|
} |
815 |
|
|
816 |
< |
private static final <V> void setTabAt |
817 |
< |
(Node<V>[] tab, int i, Node<V> v) { |
818 |
< |
U.putObjectVolatile(tab, ((long)i << ASHIFT) + ABASE, v); |
816 |
> |
/** |
817 |
> |
* Creates a new map with the same mappings as the given map. |
818 |
> |
* |
819 |
> |
* @param m the map |
820 |
> |
*/ |
821 |
> |
public ConcurrentHashMap(Map<? extends K, ? extends V> m) { |
822 |
> |
this.sizeCtl = DEFAULT_CAPACITY; |
823 |
> |
putAll(m); |
824 |
|
} |
825 |
|
|
569 |
– |
/* ---------------- Nodes -------------- */ |
570 |
– |
|
826 |
|
/** |
827 |
< |
* Key-value entry. Note that this is never exported out as a |
828 |
< |
* user-visible Map.Entry (see MapEntry below). Nodes with a hash |
829 |
< |
* field of MOVED are special, and do not contain user keys or |
830 |
< |
* values. Otherwise, keys are never null, and null val fields |
831 |
< |
* indicate that a node is in the process of being deleted or |
832 |
< |
* created. For purposes of read-only access, a key may be read |
833 |
< |
* before a val, but can only be used after checking val to be |
834 |
< |
* non-null. |
827 |
> |
* Creates a new, empty map with an initial table size based on |
828 |
> |
* the given number of elements ({@code initialCapacity}) and |
829 |
> |
* initial table density ({@code loadFactor}). |
830 |
> |
* |
831 |
> |
* @param initialCapacity the initial capacity. The implementation |
832 |
> |
* performs internal sizing to accommodate this many elements, |
833 |
> |
* given the specified load factor. |
834 |
> |
* @param loadFactor the load factor (table density) for |
835 |
> |
* establishing the initial table size |
836 |
> |
* @throws IllegalArgumentException if the initial capacity of |
837 |
> |
* elements is negative or the load factor is nonpositive |
838 |
> |
* |
839 |
> |
* @since 1.6 |
840 |
|
*/ |
841 |
< |
static class Node<V> { |
842 |
< |
final int hash; |
843 |
< |
final Object key; |
584 |
< |
volatile V val; |
585 |
< |
volatile Node<V> next; |
841 |
> |
public ConcurrentHashMap(int initialCapacity, float loadFactor) { |
842 |
> |
this(initialCapacity, loadFactor, 1); |
843 |
> |
} |
844 |
|
|
845 |
< |
Node(int hash, Object key, V val, Node<V> next) { |
846 |
< |
this.hash = hash; |
847 |
< |
this.key = key; |
848 |
< |
this.val = val; |
849 |
< |
this.next = next; |
850 |
< |
} |
845 |
> |
/** |
846 |
> |
* Creates a new, empty map with an initial table size based on |
847 |
> |
* the given number of elements ({@code initialCapacity}), table |
848 |
> |
* density ({@code loadFactor}), and number of concurrently |
849 |
> |
* updating threads ({@code concurrencyLevel}). |
850 |
> |
* |
851 |
> |
* @param initialCapacity the initial capacity. The implementation |
852 |
> |
* performs internal sizing to accommodate this many elements, |
853 |
> |
* given the specified load factor. |
854 |
> |
* @param loadFactor the load factor (table density) for |
855 |
> |
* establishing the initial table size |
856 |
> |
* @param concurrencyLevel the estimated number of concurrently |
857 |
> |
* updating threads. The implementation may use this value as |
858 |
> |
* a sizing hint. |
859 |
> |
* @throws IllegalArgumentException if the initial capacity is |
860 |
> |
* negative or the load factor or concurrencyLevel are |
861 |
> |
* nonpositive |
862 |
> |
*/ |
863 |
> |
public ConcurrentHashMap(int initialCapacity, |
864 |
> |
float loadFactor, int concurrencyLevel) { |
865 |
> |
if (!(loadFactor > 0.0f) || initialCapacity < 0 || concurrencyLevel <= 0) |
866 |
> |
throw new IllegalArgumentException(); |
867 |
> |
if (initialCapacity < concurrencyLevel) // Use at least as many bins |
868 |
> |
initialCapacity = concurrencyLevel; // as estimated threads |
869 |
> |
long size = (long)(1.0 + (long)initialCapacity / loadFactor); |
870 |
> |
int cap = (size >= (long)MAXIMUM_CAPACITY) ? |
871 |
> |
MAXIMUM_CAPACITY : tableSizeFor((int)size); |
872 |
> |
this.sizeCtl = cap; |
873 |
|
} |
874 |
|
|
875 |
< |
/* ---------------- TreeBins -------------- */ |
875 |
> |
// Original (since JDK1.2) Map methods |
876 |
|
|
877 |
|
/** |
878 |
< |
* Nodes for use in TreeBins |
878 |
> |
* {@inheritDoc} |
879 |
|
*/ |
880 |
< |
static final class TreeNode<V> extends Node<V> { |
881 |
< |
TreeNode<V> parent; // red-black tree links |
882 |
< |
TreeNode<V> left; |
883 |
< |
TreeNode<V> right; |
884 |
< |
TreeNode<V> prev; // needed to unlink next upon deletion |
885 |
< |
boolean red; |
880 |
> |
public int size() { |
881 |
> |
long n = sumCount(); |
882 |
> |
return ((n < 0L) ? 0 : |
883 |
> |
(n > (long)Integer.MAX_VALUE) ? Integer.MAX_VALUE : |
884 |
> |
(int)n); |
885 |
> |
} |
886 |
|
|
887 |
< |
TreeNode(int hash, Object key, V val, Node<V> next, TreeNode<V> parent) { |
888 |
< |
super(hash, key, val, next); |
889 |
< |
this.parent = parent; |
890 |
< |
} |
887 |
> |
/** |
888 |
> |
* {@inheritDoc} |
889 |
> |
*/ |
890 |
> |
public boolean isEmpty() { |
891 |
> |
return sumCount() <= 0L; // ignore transient negative values |
892 |
|
} |
893 |
|
|
894 |
|
/** |
895 |
< |
* A specialized form of red-black tree for use in bins |
896 |
< |
* whose size exceeds a threshold. |
895 |
> |
* Returns the value to which the specified key is mapped, |
896 |
> |
* or {@code null} if this map contains no mapping for the key. |
897 |
|
* |
898 |
< |
* TreeBins use a special form of comparison for search and |
899 |
< |
* related operations (which is the main reason we cannot use |
900 |
< |
* existing collections such as TreeMaps). TreeBins contain |
901 |
< |
* Comparable elements, but may contain others, as well as |
621 |
< |
* elements that are Comparable but not necessarily Comparable<T> |
622 |
< |
* for the same T, so we cannot invoke compareTo among them. To |
623 |
< |
* handle this, the tree is ordered primarily by hash value, then |
624 |
< |
* by getClass().getName() order, and then by Comparator order |
625 |
< |
* among elements of the same class. On lookup at a node, if |
626 |
< |
* elements are not comparable or compare as 0, both left and |
627 |
< |
* right children may need to be searched in the case of tied hash |
628 |
< |
* values. (This corresponds to the full list search that would be |
629 |
< |
* necessary if all elements were non-Comparable and had tied |
630 |
< |
* hashes.) The red-black balancing code is updated from |
631 |
< |
* pre-jdk-collections |
632 |
< |
* (http://gee.cs.oswego.edu/dl/classes/collections/RBCell.java) |
633 |
< |
* based in turn on Cormen, Leiserson, and Rivest "Introduction to |
634 |
< |
* Algorithms" (CLR). |
898 |
> |
* <p>More formally, if this map contains a mapping from a key |
899 |
> |
* {@code k} to a value {@code v} such that {@code key.equals(k)}, |
900 |
> |
* then this method returns {@code v}; otherwise it returns |
901 |
> |
* {@code null}. (There can be at most one such mapping.) |
902 |
|
* |
903 |
< |
* TreeBins also maintain a separate locking discipline than |
637 |
< |
* regular bins. Because they are forwarded via special MOVED |
638 |
< |
* nodes at bin heads (which can never change once established), |
639 |
< |
* we cannot use those nodes as locks. Instead, TreeBin |
640 |
< |
* extends AbstractQueuedSynchronizer to support a simple form of |
641 |
< |
* read-write lock. For update operations and table validation, |
642 |
< |
* the exclusive form of lock behaves in the same way as bin-head |
643 |
< |
* locks. However, lookups use shared read-lock mechanics to allow |
644 |
< |
* multiple readers in the absence of writers. Additionally, |
645 |
< |
* these lookups do not ever block: While the lock is not |
646 |
< |
* available, they proceed along the slow traversal path (via |
647 |
< |
* next-pointers) until the lock becomes available or the list is |
648 |
< |
* exhausted, whichever comes first. (These cases are not fast, |
649 |
< |
* but maximize aggregate expected throughput.) The AQS mechanics |
650 |
< |
* for doing this are straightforward. The lock state is held as |
651 |
< |
* AQS getState(). Read counts are negative; the write count (1) |
652 |
< |
* is positive. There are no signalling preferences among readers |
653 |
< |
* and writers. Since we don't need to export full Lock API, we |
654 |
< |
* just override the minimal AQS methods and use them directly. |
903 |
> |
* @throws NullPointerException if the specified key is null |
904 |
|
*/ |
905 |
< |
static final class TreeBin<V> extends AbstractQueuedSynchronizer { |
906 |
< |
private static final long serialVersionUID = 2249069246763182397L; |
907 |
< |
transient TreeNode<V> root; // root of tree |
908 |
< |
transient TreeNode<V> first; // head of next-pointer list |
909 |
< |
|
910 |
< |
/* AQS overrides */ |
911 |
< |
public final boolean isHeldExclusively() { return getState() > 0; } |
912 |
< |
public final boolean tryAcquire(int ignore) { |
913 |
< |
if (compareAndSetState(0, 1)) { |
914 |
< |
setExclusiveOwnerThread(Thread.currentThread()); |
915 |
< |
return true; |
916 |
< |
} |
917 |
< |
return false; |
918 |
< |
} |
919 |
< |
public final boolean tryRelease(int ignore) { |
671 |
< |
setExclusiveOwnerThread(null); |
672 |
< |
setState(0); |
673 |
< |
return true; |
674 |
< |
} |
675 |
< |
public final int tryAcquireShared(int ignore) { |
676 |
< |
for (int c;;) { |
677 |
< |
if ((c = getState()) > 0) |
678 |
< |
return -1; |
679 |
< |
if (compareAndSetState(c, c -1)) |
680 |
< |
return 1; |
681 |
< |
} |
682 |
< |
} |
683 |
< |
public final boolean tryReleaseShared(int ignore) { |
684 |
< |
int c; |
685 |
< |
do {} while (!compareAndSetState(c = getState(), c + 1)); |
686 |
< |
return c == -1; |
687 |
< |
} |
688 |
< |
|
689 |
< |
/** From CLR */ |
690 |
< |
private void rotateLeft(TreeNode<V> p) { |
691 |
< |
if (p != null) { |
692 |
< |
TreeNode<V> r = p.right, pp, rl; |
693 |
< |
if ((rl = p.right = r.left) != null) |
694 |
< |
rl.parent = p; |
695 |
< |
if ((pp = r.parent = p.parent) == null) |
696 |
< |
root = r; |
697 |
< |
else if (pp.left == p) |
698 |
< |
pp.left = r; |
699 |
< |
else |
700 |
< |
pp.right = r; |
701 |
< |
r.left = p; |
702 |
< |
p.parent = r; |
703 |
< |
} |
704 |
< |
} |
705 |
< |
|
706 |
< |
/** From CLR */ |
707 |
< |
private void rotateRight(TreeNode<V> p) { |
708 |
< |
if (p != null) { |
709 |
< |
TreeNode<V> l = p.left, pp, lr; |
710 |
< |
if ((lr = p.left = l.right) != null) |
711 |
< |
lr.parent = p; |
712 |
< |
if ((pp = l.parent = p.parent) == null) |
713 |
< |
root = l; |
714 |
< |
else if (pp.right == p) |
715 |
< |
pp.right = l; |
716 |
< |
else |
717 |
< |
pp.left = l; |
718 |
< |
l.right = p; |
719 |
< |
p.parent = l; |
905 |
> |
public V get(Object key) { |
906 |
> |
Node<K,V>[] tab; Node<K,V> e, p; int n, eh; K ek; |
907 |
> |
int h = spread(key.hashCode()); |
908 |
> |
if ((tab = table) != null && (n = tab.length) > 0 && |
909 |
> |
(e = tabAt(tab, (n - 1) & h)) != null) { |
910 |
> |
if ((eh = e.hash) == h) { |
911 |
> |
if ((ek = e.key) == key || (ek != null && key.equals(ek))) |
912 |
> |
return e.val; |
913 |
> |
} |
914 |
> |
else if (eh < 0) |
915 |
> |
return (p = e.find(h, key)) != null ? p.val : null; |
916 |
> |
while ((e = e.next) != null) { |
917 |
> |
if (e.hash == h && |
918 |
> |
((ek = e.key) == key || (ek != null && key.equals(ek)))) |
919 |
> |
return e.val; |
920 |
|
} |
921 |
|
} |
922 |
+ |
return null; |
923 |
+ |
} |
924 |
|
|
925 |
< |
/** |
926 |
< |
* Returns the TreeNode (or null if not found) for the given key |
927 |
< |
* starting at given root. |
928 |
< |
*/ |
929 |
< |
@SuppressWarnings("unchecked") final TreeNode<V> getTreeNode |
930 |
< |
(int h, Object k, TreeNode<V> p) { |
931 |
< |
Class<?> c = k.getClass(); |
932 |
< |
while (p != null) { |
933 |
< |
int dir, ph; Object pk; Class<?> pc; |
934 |
< |
if ((ph = p.hash) == h) { |
935 |
< |
if ((pk = p.key) == k || k.equals(pk)) |
936 |
< |
return p; |
735 |
< |
if (c != (pc = pk.getClass()) || |
736 |
< |
!(k instanceof Comparable) || |
737 |
< |
(dir = ((Comparable)k).compareTo((Comparable)pk)) == 0) { |
738 |
< |
if ((dir = (c == pc) ? 0 : |
739 |
< |
c.getName().compareTo(pc.getName())) == 0) { |
740 |
< |
TreeNode<V> r = null, pl, pr; // check both sides |
741 |
< |
if ((pr = p.right) != null && h >= pr.hash && |
742 |
< |
(r = getTreeNode(h, k, pr)) != null) |
743 |
< |
return r; |
744 |
< |
else if ((pl = p.left) != null && h <= pl.hash) |
745 |
< |
dir = -1; |
746 |
< |
else // nothing there |
747 |
< |
return null; |
748 |
< |
} |
749 |
< |
} |
750 |
< |
} |
751 |
< |
else |
752 |
< |
dir = (h < ph) ? -1 : 1; |
753 |
< |
p = (dir > 0) ? p.right : p.left; |
754 |
< |
} |
755 |
< |
return null; |
756 |
< |
} |
925 |
> |
/** |
926 |
> |
* Tests if the specified object is a key in this table. |
927 |
> |
* |
928 |
> |
* @param key possible key |
929 |
> |
* @return {@code true} if and only if the specified object |
930 |
> |
* is a key in this table, as determined by the |
931 |
> |
* {@code equals} method; {@code false} otherwise |
932 |
> |
* @throws NullPointerException if the specified key is null |
933 |
> |
*/ |
934 |
> |
public boolean containsKey(Object key) { |
935 |
> |
return get(key) != null; |
936 |
> |
} |
937 |
|
|
938 |
< |
/** |
939 |
< |
* Wrapper for getTreeNode used by CHM.get. Tries to obtain |
940 |
< |
* read-lock to call getTreeNode, but during failure to get |
941 |
< |
* lock, searches along next links. |
942 |
< |
*/ |
943 |
< |
final V getValue(int h, Object k) { |
944 |
< |
Node<V> r = null; |
945 |
< |
int c = getState(); // Must read lock state first |
946 |
< |
for (Node<V> e = first; e != null; e = e.next) { |
947 |
< |
if (c <= 0 && compareAndSetState(c, c - 1)) { |
948 |
< |
try { |
949 |
< |
r = getTreeNode(h, k, root); |
950 |
< |
} finally { |
951 |
< |
releaseShared(0); |
952 |
< |
} |
953 |
< |
break; |
954 |
< |
} |
955 |
< |
else if (e.hash == h && k.equals(e.key)) { |
956 |
< |
r = e; |
957 |
< |
break; |
778 |
< |
} |
779 |
< |
else |
780 |
< |
c = getState(); |
938 |
> |
/** |
939 |
> |
* Returns {@code true} if this map maps one or more keys to the |
940 |
> |
* specified value. Note: This method may require a full traversal |
941 |
> |
* of the map, and is much slower than method {@code containsKey}. |
942 |
> |
* |
943 |
> |
* @param value value whose presence in this map is to be tested |
944 |
> |
* @return {@code true} if this map maps one or more keys to the |
945 |
> |
* specified value |
946 |
> |
* @throws NullPointerException if the specified value is null |
947 |
> |
*/ |
948 |
> |
public boolean containsValue(Object value) { |
949 |
> |
if (value == null) |
950 |
> |
throw new NullPointerException(); |
951 |
> |
Node<K,V>[] t; |
952 |
> |
if ((t = table) != null) { |
953 |
> |
Traverser<K,V> it = new Traverser<K,V>(t, t.length, 0, t.length); |
954 |
> |
for (Node<K,V> p; (p = it.advance()) != null; ) { |
955 |
> |
V v; |
956 |
> |
if ((v = p.val) == value || (v != null && value.equals(v))) |
957 |
> |
return true; |
958 |
|
} |
782 |
– |
return r == null ? null : r.val; |
959 |
|
} |
960 |
+ |
return false; |
961 |
+ |
} |
962 |
|
|
963 |
< |
/** |
964 |
< |
* Finds or adds a node. |
965 |
< |
* @return null if added |
966 |
< |
*/ |
967 |
< |
@SuppressWarnings("unchecked") final TreeNode<V> putTreeNode |
968 |
< |
(int h, Object k, V v) { |
969 |
< |
Class<?> c = k.getClass(); |
970 |
< |
TreeNode<V> pp = root, p = null; |
971 |
< |
int dir = 0; |
972 |
< |
while (pp != null) { // find existing node or leaf to insert at |
973 |
< |
int ph; Object pk; Class<?> pc; |
974 |
< |
p = pp; |
975 |
< |
if ((ph = p.hash) == h) { |
976 |
< |
if ((pk = p.key) == k || k.equals(pk)) |
977 |
< |
return p; |
978 |
< |
if (c != (pc = pk.getClass()) || |
801 |
< |
!(k instanceof Comparable) || |
802 |
< |
(dir = ((Comparable)k).compareTo((Comparable)pk)) == 0) { |
803 |
< |
TreeNode<V> s = null, r = null, pr; |
804 |
< |
if ((dir = (c == pc) ? 0 : |
805 |
< |
c.getName().compareTo(pc.getName())) == 0) { |
806 |
< |
if ((pr = p.right) != null && h >= pr.hash && |
807 |
< |
(r = getTreeNode(h, k, pr)) != null) |
808 |
< |
return r; |
809 |
< |
else // continue left |
810 |
< |
dir = -1; |
811 |
< |
} |
812 |
< |
else if ((pr = p.right) != null && h >= pr.hash) |
813 |
< |
s = pr; |
814 |
< |
if (s != null && (r = getTreeNode(h, k, s)) != null) |
815 |
< |
return r; |
816 |
< |
} |
817 |
< |
} |
818 |
< |
else |
819 |
< |
dir = (h < ph) ? -1 : 1; |
820 |
< |
pp = (dir > 0) ? p.right : p.left; |
821 |
< |
} |
822 |
< |
|
823 |
< |
TreeNode<V> f = first; |
824 |
< |
TreeNode<V> x = first = new TreeNode<V>(h, k, v, f, p); |
825 |
< |
if (p == null) |
826 |
< |
root = x; |
827 |
< |
else { // attach and rebalance; adapted from CLR |
828 |
< |
TreeNode<V> xp, xpp; |
829 |
< |
if (f != null) |
830 |
< |
f.prev = x; |
831 |
< |
if (dir <= 0) |
832 |
< |
p.left = x; |
833 |
< |
else |
834 |
< |
p.right = x; |
835 |
< |
x.red = true; |
836 |
< |
while (x != null && (xp = x.parent) != null && xp.red && |
837 |
< |
(xpp = xp.parent) != null) { |
838 |
< |
TreeNode<V> xppl = xpp.left; |
839 |
< |
if (xp == xppl) { |
840 |
< |
TreeNode<V> y = xpp.right; |
841 |
< |
if (y != null && y.red) { |
842 |
< |
y.red = false; |
843 |
< |
xp.red = false; |
844 |
< |
xpp.red = true; |
845 |
< |
x = xpp; |
846 |
< |
} |
847 |
< |
else { |
848 |
< |
if (x == xp.right) { |
849 |
< |
rotateLeft(x = xp); |
850 |
< |
xpp = (xp = x.parent) == null ? null : xp.parent; |
851 |
< |
} |
852 |
< |
if (xp != null) { |
853 |
< |
xp.red = false; |
854 |
< |
if (xpp != null) { |
855 |
< |
xpp.red = true; |
856 |
< |
rotateRight(xpp); |
857 |
< |
} |
858 |
< |
} |
859 |
< |
} |
860 |
< |
} |
861 |
< |
else { |
862 |
< |
TreeNode<V> y = xppl; |
863 |
< |
if (y != null && y.red) { |
864 |
< |
y.red = false; |
865 |
< |
xp.red = false; |
866 |
< |
xpp.red = true; |
867 |
< |
x = xpp; |
868 |
< |
} |
869 |
< |
else { |
870 |
< |
if (x == xp.left) { |
871 |
< |
rotateRight(x = xp); |
872 |
< |
xpp = (xp = x.parent) == null ? null : xp.parent; |
873 |
< |
} |
874 |
< |
if (xp != null) { |
875 |
< |
xp.red = false; |
876 |
< |
if (xpp != null) { |
877 |
< |
xpp.red = true; |
878 |
< |
rotateLeft(xpp); |
879 |
< |
} |
880 |
< |
} |
881 |
< |
} |
882 |
< |
} |
883 |
< |
} |
884 |
< |
TreeNode<V> r = root; |
885 |
< |
if (r != null && r.red) |
886 |
< |
r.red = false; |
887 |
< |
} |
888 |
< |
return null; |
889 |
< |
} |
963 |
> |
/** |
964 |
> |
* Maps the specified key to the specified value in this table. |
965 |
> |
* Neither the key nor the value can be null. |
966 |
> |
* |
967 |
> |
* <p>The value can be retrieved by calling the {@code get} method |
968 |
> |
* with a key that is equal to the original key. |
969 |
> |
* |
970 |
> |
* @param key key with which the specified value is to be associated |
971 |
> |
* @param value value to be associated with the specified key |
972 |
> |
* @return the previous value associated with {@code key}, or |
973 |
> |
* {@code null} if there was no mapping for {@code key} |
974 |
> |
* @throws NullPointerException if the specified key or value is null |
975 |
> |
*/ |
976 |
> |
public V put(K key, V value) { |
977 |
> |
return putVal(key, value, false); |
978 |
> |
} |
979 |
|
|
980 |
< |
/** |
981 |
< |
* Removes the given node, that must be present before this |
982 |
< |
* call. This is messier than typical red-black deletion code |
983 |
< |
* because we cannot swap the contents of an interior node |
984 |
< |
* with a leaf successor that is pinned by "next" pointers |
985 |
< |
* that are accessible independently of lock. So instead we |
986 |
< |
* swap the tree linkages. |
987 |
< |
*/ |
988 |
< |
final void deleteTreeNode(TreeNode<V> p) { |
989 |
< |
TreeNode<V> next = (TreeNode<V>)p.next; // unlink traversal pointers |
990 |
< |
TreeNode<V> pred = p.prev; |
991 |
< |
if (pred == null) |
992 |
< |
first = next; |
904 |
< |
else |
905 |
< |
pred.next = next; |
906 |
< |
if (next != null) |
907 |
< |
next.prev = pred; |
908 |
< |
TreeNode<V> replacement; |
909 |
< |
TreeNode<V> pl = p.left; |
910 |
< |
TreeNode<V> pr = p.right; |
911 |
< |
if (pl != null && pr != null) { |
912 |
< |
TreeNode<V> s = pr, sl; |
913 |
< |
while ((sl = s.left) != null) // find successor |
914 |
< |
s = sl; |
915 |
< |
boolean c = s.red; s.red = p.red; p.red = c; // swap colors |
916 |
< |
TreeNode<V> sr = s.right; |
917 |
< |
TreeNode<V> pp = p.parent; |
918 |
< |
if (s == pr) { // p was s's direct parent |
919 |
< |
p.parent = s; |
920 |
< |
s.right = p; |
921 |
< |
} |
922 |
< |
else { |
923 |
< |
TreeNode<V> sp = s.parent; |
924 |
< |
if ((p.parent = sp) != null) { |
925 |
< |
if (s == sp.left) |
926 |
< |
sp.left = p; |
927 |
< |
else |
928 |
< |
sp.right = p; |
929 |
< |
} |
930 |
< |
if ((s.right = pr) != null) |
931 |
< |
pr.parent = s; |
932 |
< |
} |
933 |
< |
p.left = null; |
934 |
< |
if ((p.right = sr) != null) |
935 |
< |
sr.parent = p; |
936 |
< |
if ((s.left = pl) != null) |
937 |
< |
pl.parent = s; |
938 |
< |
if ((s.parent = pp) == null) |
939 |
< |
root = s; |
940 |
< |
else if (p == pp.left) |
941 |
< |
pp.left = s; |
942 |
< |
else |
943 |
< |
pp.right = s; |
944 |
< |
replacement = sr; |
945 |
< |
} |
946 |
< |
else |
947 |
< |
replacement = (pl != null) ? pl : pr; |
948 |
< |
TreeNode<V> pp = p.parent; |
949 |
< |
if (replacement == null) { |
950 |
< |
if (pp == null) { |
951 |
< |
root = null; |
952 |
< |
return; |
953 |
< |
} |
954 |
< |
replacement = p; |
980 |
> |
/** Implementation for put and putIfAbsent */ |
981 |
> |
final V putVal(K key, V value, boolean onlyIfAbsent) { |
982 |
> |
if (key == null || value == null) throw new NullPointerException(); |
983 |
> |
int hash = spread(key.hashCode()); |
984 |
> |
int binCount = 0; |
985 |
> |
for (Node<K,V>[] tab = table;;) { |
986 |
> |
Node<K,V> f; int n, i, fh; |
987 |
> |
if (tab == null || (n = tab.length) == 0) |
988 |
> |
tab = initTable(); |
989 |
> |
else if ((f = tabAt(tab, i = (n - 1) & hash)) == null) { |
990 |
> |
if (casTabAt(tab, i, null, |
991 |
> |
new Node<K,V>(hash, key, value, null))) |
992 |
> |
break; // no lock when adding to empty bin |
993 |
|
} |
994 |
+ |
else if ((fh = f.hash) == MOVED) |
995 |
+ |
tab = helpTransfer(tab, f); |
996 |
|
else { |
997 |
< |
replacement.parent = pp; |
998 |
< |
if (pp == null) |
999 |
< |
root = replacement; |
1000 |
< |
else if (p == pp.left) |
1001 |
< |
pp.left = replacement; |
1002 |
< |
else |
1003 |
< |
pp.right = replacement; |
1004 |
< |
p.left = p.right = p.parent = null; |
1005 |
< |
} |
1006 |
< |
if (!p.red) { // rebalance, from CLR |
1007 |
< |
TreeNode<V> x = replacement; |
1008 |
< |
while (x != null) { |
1009 |
< |
TreeNode<V> xp, xpl; |
1010 |
< |
if (x.red || (xp = x.parent) == null) { |
971 |
< |
x.red = false; |
972 |
< |
break; |
973 |
< |
} |
974 |
< |
if (x == (xpl = xp.left)) { |
975 |
< |
TreeNode<V> sib = xp.right; |
976 |
< |
if (sib != null && sib.red) { |
977 |
< |
sib.red = false; |
978 |
< |
xp.red = true; |
979 |
< |
rotateLeft(xp); |
980 |
< |
sib = (xp = x.parent) == null ? null : xp.right; |
981 |
< |
} |
982 |
< |
if (sib == null) |
983 |
< |
x = xp; |
984 |
< |
else { |
985 |
< |
TreeNode<V> sl = sib.left, sr = sib.right; |
986 |
< |
if ((sr == null || !sr.red) && |
987 |
< |
(sl == null || !sl.red)) { |
988 |
< |
sib.red = true; |
989 |
< |
x = xp; |
990 |
< |
} |
991 |
< |
else { |
992 |
< |
if (sr == null || !sr.red) { |
993 |
< |
if (sl != null) |
994 |
< |
sl.red = false; |
995 |
< |
sib.red = true; |
996 |
< |
rotateRight(sib); |
997 |
< |
sib = (xp = x.parent) == null ? |
998 |
< |
null : xp.right; |
999 |
< |
} |
1000 |
< |
if (sib != null) { |
1001 |
< |
sib.red = (xp == null) ? false : xp.red; |
1002 |
< |
if ((sr = sib.right) != null) |
1003 |
< |
sr.red = false; |
997 |
> |
V oldVal = null; |
998 |
> |
synchronized (f) { |
999 |
> |
if (tabAt(tab, i) == f) { |
1000 |
> |
if (fh >= 0) { |
1001 |
> |
binCount = 1; |
1002 |
> |
for (Node<K,V> e = f;; ++binCount) { |
1003 |
> |
K ek; |
1004 |
> |
if (e.hash == hash && |
1005 |
> |
((ek = e.key) == key || |
1006 |
> |
(ek != null && key.equals(ek)))) { |
1007 |
> |
oldVal = e.val; |
1008 |
> |
if (!onlyIfAbsent) |
1009 |
> |
e.val = value; |
1010 |
> |
break; |
1011 |
|
} |
1012 |
< |
if (xp != null) { |
1013 |
< |
xp.red = false; |
1014 |
< |
rotateLeft(xp); |
1012 |
> |
Node<K,V> pred = e; |
1013 |
> |
if ((e = e.next) == null) { |
1014 |
> |
pred.next = new Node<K,V>(hash, key, |
1015 |
> |
value, null); |
1016 |
> |
break; |
1017 |
|
} |
1009 |
– |
x = root; |
1018 |
|
} |
1019 |
|
} |
1020 |
< |
} |
1021 |
< |
else { // symmetric |
1022 |
< |
TreeNode<V> sib = xpl; |
1023 |
< |
if (sib != null && sib.red) { |
1024 |
< |
sib.red = false; |
1025 |
< |
xp.red = true; |
1026 |
< |
rotateRight(xp); |
1027 |
< |
sib = (xp = x.parent) == null ? null : xp.left; |
1020 |
< |
} |
1021 |
< |
if (sib == null) |
1022 |
< |
x = xp; |
1023 |
< |
else { |
1024 |
< |
TreeNode<V> sl = sib.left, sr = sib.right; |
1025 |
< |
if ((sl == null || !sl.red) && |
1026 |
< |
(sr == null || !sr.red)) { |
1027 |
< |
sib.red = true; |
1028 |
< |
x = xp; |
1029 |
< |
} |
1030 |
< |
else { |
1031 |
< |
if (sl == null || !sl.red) { |
1032 |
< |
if (sr != null) |
1033 |
< |
sr.red = false; |
1034 |
< |
sib.red = true; |
1035 |
< |
rotateLeft(sib); |
1036 |
< |
sib = (xp = x.parent) == null ? |
1037 |
< |
null : xp.left; |
1038 |
< |
} |
1039 |
< |
if (sib != null) { |
1040 |
< |
sib.red = (xp == null) ? false : xp.red; |
1041 |
< |
if ((sl = sib.left) != null) |
1042 |
< |
sl.red = false; |
1043 |
< |
} |
1044 |
< |
if (xp != null) { |
1045 |
< |
xp.red = false; |
1046 |
< |
rotateRight(xp); |
1047 |
< |
} |
1048 |
< |
x = root; |
1020 |
> |
else if (f instanceof TreeBin) { |
1021 |
> |
Node<K,V> p; |
1022 |
> |
binCount = 2; |
1023 |
> |
if ((p = ((TreeBin<K,V>)f).putTreeVal(hash, key, |
1024 |
> |
value)) != null) { |
1025 |
> |
oldVal = p.val; |
1026 |
> |
if (!onlyIfAbsent) |
1027 |
> |
p.val = value; |
1028 |
|
} |
1029 |
|
} |
1030 |
|
} |
1031 |
|
} |
1032 |
< |
} |
1033 |
< |
if (p == replacement && (pp = p.parent) != null) { |
1034 |
< |
if (p == pp.left) // detach pointers |
1035 |
< |
pp.left = null; |
1036 |
< |
else if (p == pp.right) |
1037 |
< |
pp.right = null; |
1038 |
< |
p.parent = null; |
1032 |
> |
if (binCount != 0) { |
1033 |
> |
if (binCount >= TREEIFY_THRESHOLD) |
1034 |
> |
treeifyBin(tab, i); |
1035 |
> |
if (oldVal != null) |
1036 |
> |
return oldVal; |
1037 |
> |
break; |
1038 |
> |
} |
1039 |
|
} |
1040 |
|
} |
1041 |
+ |
addCount(1L, binCount); |
1042 |
+ |
return null; |
1043 |
|
} |
1044 |
|
|
1064 |
– |
/* ---------------- Collision reduction methods -------------- */ |
1065 |
– |
|
1045 |
|
/** |
1046 |
< |
* Spreads higher bits to lower, and also forces top bit to 0. |
1047 |
< |
* Because the table uses power-of-two masking, sets of hashes |
1048 |
< |
* that vary only in bits above the current mask will always |
1049 |
< |
* collide. (Among known examples are sets of Float keys holding |
1050 |
< |
* consecutive whole numbers in small tables.) To counter this, |
1072 |
< |
* we apply a transform that spreads the impact of higher bits |
1073 |
< |
* downward. There is a tradeoff between speed, utility, and |
1074 |
< |
* quality of bit-spreading. Because many common sets of hashes |
1075 |
< |
* are already reasonably distributed across bits (so don't benefit |
1076 |
< |
* from spreading), and because we use trees to handle large sets |
1077 |
< |
* of collisions in bins, we don't need excessively high quality. |
1046 |
> |
* Copies all of the mappings from the specified map to this one. |
1047 |
> |
* These mappings replace any mappings that this map had for any of the |
1048 |
> |
* keys currently in the specified map. |
1049 |
> |
* |
1050 |
> |
* @param m mappings to be stored in this map |
1051 |
|
*/ |
1052 |
< |
private static final int spread(int h) { |
1053 |
< |
h ^= (h >>> 18) ^ (h >>> 12); |
1054 |
< |
return (h ^ (h >>> 10)) & HASH_BITS; |
1052 |
> |
public void putAll(Map<? extends K, ? extends V> m) { |
1053 |
> |
tryPresize(m.size()); |
1054 |
> |
for (Map.Entry<? extends K, ? extends V> e : m.entrySet()) |
1055 |
> |
putVal(e.getKey(), e.getValue(), false); |
1056 |
|
} |
1057 |
|
|
1058 |
|
/** |
1059 |
< |
* Replaces a list bin with a tree bin if key is comparable. Call |
1060 |
< |
* only when locked. |
1059 |
> |
* Removes the key (and its corresponding value) from this map. |
1060 |
> |
* This method does nothing if the key is not in the map. |
1061 |
> |
* |
1062 |
> |
* @param key the key that needs to be removed |
1063 |
> |
* @return the previous value associated with {@code key}, or |
1064 |
> |
* {@code null} if there was no mapping for {@code key} |
1065 |
> |
* @throws NullPointerException if the specified key is null |
1066 |
|
*/ |
1067 |
< |
private final void replaceWithTreeBin(Node<V>[] tab, int index, Object key) { |
1068 |
< |
if (key instanceof Comparable) { |
1090 |
< |
TreeBin<V> t = new TreeBin<V>(); |
1091 |
< |
for (Node<V> e = tabAt(tab, index); e != null; e = e.next) |
1092 |
< |
t.putTreeNode(e.hash, e.key, e.val); |
1093 |
< |
setTabAt(tab, index, new Node<V>(MOVED, t, null, null)); |
1094 |
< |
} |
1095 |
< |
} |
1096 |
< |
|
1097 |
< |
/* ---------------- Internal access and update methods -------------- */ |
1098 |
< |
|
1099 |
< |
/** Implementation for get and containsKey */ |
1100 |
< |
@SuppressWarnings("unchecked") private final V internalGet(Object k) { |
1101 |
< |
int h = spread(k.hashCode()); |
1102 |
< |
retry: for (Node<V>[] tab = table; tab != null;) { |
1103 |
< |
Node<V> e; Object ek; V ev; int eh; // locals to read fields once |
1104 |
< |
for (e = tabAt(tab, (tab.length - 1) & h); e != null; e = e.next) { |
1105 |
< |
if ((eh = e.hash) < 0) { |
1106 |
< |
if ((ek = e.key) instanceof TreeBin) // search TreeBin |
1107 |
< |
return ((TreeBin<V>)ek).getValue(h, k); |
1108 |
< |
else { // restart with new table |
1109 |
< |
tab = (Node<V>[])ek; |
1110 |
< |
continue retry; |
1111 |
< |
} |
1112 |
< |
} |
1113 |
< |
else if (eh == h && (ev = e.val) != null && |
1114 |
< |
((ek = e.key) == k || k.equals(ek))) |
1115 |
< |
return ev; |
1116 |
< |
} |
1117 |
< |
break; |
1118 |
< |
} |
1119 |
< |
return null; |
1067 |
> |
public V remove(Object key) { |
1068 |
> |
return replaceNode(key, null, null); |
1069 |
|
} |
1070 |
|
|
1071 |
|
/** |
1073 |
|
* Replaces node value with v, conditional upon match of cv if |
1074 |
|
* non-null. If resulting value is null, delete. |
1075 |
|
*/ |
1076 |
< |
@SuppressWarnings("unchecked") private final V internalReplace |
1077 |
< |
(Object k, V v, Object cv) { |
1078 |
< |
int h = spread(k.hashCode()); |
1079 |
< |
V oldVal = null; |
1080 |
< |
for (Node<V>[] tab = table;;) { |
1081 |
< |
Node<V> f; int i, fh; Object fk; |
1133 |
< |
if (tab == null || |
1134 |
< |
(f = tabAt(tab, i = (tab.length - 1) & h)) == null) |
1076 |
> |
final V replaceNode(Object key, V value, Object cv) { |
1077 |
> |
int hash = spread(key.hashCode()); |
1078 |
> |
for (Node<K,V>[] tab = table;;) { |
1079 |
> |
Node<K,V> f; int n, i, fh; |
1080 |
> |
if (tab == null || (n = tab.length) == 0 || |
1081 |
> |
(f = tabAt(tab, i = (n - 1) & hash)) == null) |
1082 |
|
break; |
1083 |
< |
else if ((fh = f.hash) < 0) { |
1084 |
< |
if ((fk = f.key) instanceof TreeBin) { |
1085 |
< |
TreeBin<V> t = (TreeBin<V>)fk; |
1086 |
< |
boolean validated = false; |
1087 |
< |
boolean deleted = false; |
1088 |
< |
t.acquire(0); |
1089 |
< |
try { |
1090 |
< |
if (tabAt(tab, i) == f) { |
1083 |
> |
else if ((fh = f.hash) == MOVED) |
1084 |
> |
tab = helpTransfer(tab, f); |
1085 |
> |
else { |
1086 |
> |
V oldVal = null; |
1087 |
> |
boolean validated = false; |
1088 |
> |
synchronized (f) { |
1089 |
> |
if (tabAt(tab, i) == f) { |
1090 |
> |
if (fh >= 0) { |
1091 |
|
validated = true; |
1092 |
< |
TreeNode<V> p = t.getTreeNode(h, k, t.root); |
1093 |
< |
if (p != null) { |
1092 |
> |
for (Node<K,V> e = f, pred = null;;) { |
1093 |
> |
K ek; |
1094 |
> |
if (e.hash == hash && |
1095 |
> |
((ek = e.key) == key || |
1096 |
> |
(ek != null && key.equals(ek)))) { |
1097 |
> |
V ev = e.val; |
1098 |
> |
if (cv == null || cv == ev || |
1099 |
> |
(ev != null && cv.equals(ev))) { |
1100 |
> |
oldVal = ev; |
1101 |
> |
if (value != null) |
1102 |
> |
e.val = value; |
1103 |
> |
else if (pred != null) |
1104 |
> |
pred.next = e.next; |
1105 |
> |
else |
1106 |
> |
setTabAt(tab, i, e.next); |
1107 |
> |
} |
1108 |
> |
break; |
1109 |
> |
} |
1110 |
> |
pred = e; |
1111 |
> |
if ((e = e.next) == null) |
1112 |
> |
break; |
1113 |
> |
} |
1114 |
> |
} |
1115 |
> |
else if (f instanceof TreeBin) { |
1116 |
> |
validated = true; |
1117 |
> |
TreeBin<K,V> t = (TreeBin<K,V>)f; |
1118 |
> |
TreeNode<K,V> r, p; |
1119 |
> |
if ((r = t.root) != null && |
1120 |
> |
(p = r.findTreeNode(hash, key, null)) != null) { |
1121 |
|
V pv = p.val; |
1122 |
< |
if (cv == null || cv == pv || cv.equals(pv)) { |
1122 |
> |
if (cv == null || cv == pv || |
1123 |
> |
(pv != null && cv.equals(pv))) { |
1124 |
|
oldVal = pv; |
1125 |
< |
if ((p.val = v) == null) { |
1126 |
< |
deleted = true; |
1127 |
< |
t.deleteTreeNode(p); |
1128 |
< |
} |
1125 |
> |
if (value != null) |
1126 |
> |
p.val = value; |
1127 |
> |
else if (t.removeTreeNode(p)) |
1128 |
> |
setTabAt(tab, i, untreeify(t.first)); |
1129 |
|
} |
1130 |
|
} |
1131 |
|
} |
1157 |
– |
} finally { |
1158 |
– |
t.release(0); |
1132 |
|
} |
1133 |
< |
if (validated) { |
1134 |
< |
if (deleted) |
1133 |
> |
} |
1134 |
> |
if (validated) { |
1135 |
> |
if (oldVal != null) { |
1136 |
> |
if (value == null) |
1137 |
|
addCount(-1L, -1); |
1138 |
< |
break; |
1138 |
> |
return oldVal; |
1139 |
|
} |
1140 |
+ |
break; |
1141 |
|
} |
1166 |
– |
else |
1167 |
– |
tab = (Node<V>[])fk; |
1142 |
|
} |
1143 |
< |
else if (fh != h && f.next == null) // precheck |
1144 |
< |
break; // rules out possible existence |
1143 |
> |
} |
1144 |
> |
return null; |
1145 |
> |
} |
1146 |
> |
|
1147 |
> |
/** |
1148 |
> |
* Removes all of the mappings from this map. |
1149 |
> |
*/ |
1150 |
> |
public void clear() { |
1151 |
> |
long delta = 0L; // negative number of deletions |
1152 |
> |
int i = 0; |
1153 |
> |
Node<K,V>[] tab = table; |
1154 |
> |
while (tab != null && i < tab.length) { |
1155 |
> |
int fh; |
1156 |
> |
Node<K,V> f = tabAt(tab, i); |
1157 |
> |
if (f == null) |
1158 |
> |
++i; |
1159 |
> |
else if ((fh = f.hash) == MOVED) { |
1160 |
> |
tab = helpTransfer(tab, f); |
1161 |
> |
i = 0; // restart |
1162 |
> |
} |
1163 |
|
else { |
1172 |
– |
boolean validated = false; |
1173 |
– |
boolean deleted = false; |
1164 |
|
synchronized (f) { |
1165 |
|
if (tabAt(tab, i) == f) { |
1166 |
< |
validated = true; |
1167 |
< |
for (Node<V> e = f, pred = null;;) { |
1168 |
< |
Object ek; V ev; |
1169 |
< |
if (e.hash == h && |
1170 |
< |
((ev = e.val) != null) && |
1171 |
< |
((ek = e.key) == k || k.equals(ek))) { |
1182 |
< |
if (cv == null || cv == ev || cv.equals(ev)) { |
1183 |
< |
oldVal = ev; |
1184 |
< |
if ((e.val = v) == null) { |
1185 |
< |
deleted = true; |
1186 |
< |
Node<V> en = e.next; |
1187 |
< |
if (pred != null) |
1188 |
< |
pred.next = en; |
1189 |
< |
else |
1190 |
< |
setTabAt(tab, i, en); |
1191 |
< |
} |
1192 |
< |
} |
1193 |
< |
break; |
1194 |
< |
} |
1195 |
< |
pred = e; |
1196 |
< |
if ((e = e.next) == null) |
1197 |
< |
break; |
1166 |
> |
Node<K,V> p = (fh >= 0 ? f : |
1167 |
> |
(f instanceof TreeBin) ? |
1168 |
> |
((TreeBin<K,V>)f).first : null); |
1169 |
> |
while (p != null) { |
1170 |
> |
--delta; |
1171 |
> |
p = p.next; |
1172 |
|
} |
1173 |
+ |
setTabAt(tab, i++, null); |
1174 |
|
} |
1175 |
|
} |
1176 |
< |
if (validated) { |
1177 |
< |
if (deleted) |
1178 |
< |
addCount(-1L, -1); |
1176 |
> |
} |
1177 |
> |
} |
1178 |
> |
if (delta != 0L) |
1179 |
> |
addCount(delta, -1); |
1180 |
> |
} |
1181 |
> |
|
1182 |
> |
/** |
1183 |
> |
* Returns a {@link Set} view of the keys contained in this map. |
1184 |
> |
* The set is backed by the map, so changes to the map are |
1185 |
> |
* reflected in the set, and vice-versa. The set supports element |
1186 |
> |
* removal, which removes the corresponding mapping from this map, |
1187 |
> |
* via the {@code Iterator.remove}, {@code Set.remove}, |
1188 |
> |
* {@code removeAll}, {@code retainAll}, and {@code clear} |
1189 |
> |
* operations. It does not support the {@code add} or |
1190 |
> |
* {@code addAll} operations. |
1191 |
> |
* |
1192 |
> |
* <p>The view's iterators and spliterators are |
1193 |
> |
* <a href="package-summary.html#Weakly"><i>weakly consistent</i></a>. |
1194 |
> |
* |
1195 |
> |
* <p>The view's {@code spliterator} reports {@link Spliterator#CONCURRENT}, |
1196 |
> |
* {@link Spliterator#DISTINCT}, and {@link Spliterator#NONNULL}. |
1197 |
> |
* |
1198 |
> |
* @return the set view |
1199 |
> |
*/ |
1200 |
> |
public KeySetView<K,V> keySet() { |
1201 |
> |
KeySetView<K,V> ks; |
1202 |
> |
return (ks = keySet) != null ? ks : (keySet = new KeySetView<K,V>(this, null)); |
1203 |
> |
} |
1204 |
> |
|
1205 |
> |
/** |
1206 |
> |
* Returns a {@link Collection} view of the values contained in this map. |
1207 |
> |
* The collection is backed by the map, so changes to the map are |
1208 |
> |
* reflected in the collection, and vice-versa. The collection |
1209 |
> |
* supports element removal, which removes the corresponding |
1210 |
> |
* mapping from this map, via the {@code Iterator.remove}, |
1211 |
> |
* {@code Collection.remove}, {@code removeAll}, |
1212 |
> |
* {@code retainAll}, and {@code clear} operations. It does not |
1213 |
> |
* support the {@code add} or {@code addAll} operations. |
1214 |
> |
* |
1215 |
> |
* <p>The view's iterators and spliterators are |
1216 |
> |
* <a href="package-summary.html#Weakly"><i>weakly consistent</i></a>. |
1217 |
> |
* |
1218 |
> |
* <p>The view's {@code spliterator} reports {@link Spliterator#CONCURRENT} |
1219 |
> |
* and {@link Spliterator#NONNULL}. |
1220 |
> |
* |
1221 |
> |
* @return the collection view |
1222 |
> |
*/ |
1223 |
> |
public Collection<V> values() { |
1224 |
> |
ValuesView<K,V> vs; |
1225 |
> |
return (vs = values) != null ? vs : (values = new ValuesView<K,V>(this)); |
1226 |
> |
} |
1227 |
> |
|
1228 |
> |
/** |
1229 |
> |
* Returns a {@link Set} view of the mappings contained in this map. |
1230 |
> |
* The set is backed by the map, so changes to the map are |
1231 |
> |
* reflected in the set, and vice-versa. The set supports element |
1232 |
> |
* removal, which removes the corresponding mapping from the map, |
1233 |
> |
* via the {@code Iterator.remove}, {@code Set.remove}, |
1234 |
> |
* {@code removeAll}, {@code retainAll}, and {@code clear} |
1235 |
> |
* operations. |
1236 |
> |
* |
1237 |
> |
* <p>The view's iterators and spliterators are |
1238 |
> |
* <a href="package-summary.html#Weakly"><i>weakly consistent</i></a>. |
1239 |
> |
* |
1240 |
> |
* <p>The view's {@code spliterator} reports {@link Spliterator#CONCURRENT}, |
1241 |
> |
* {@link Spliterator#DISTINCT}, and {@link Spliterator#NONNULL}. |
1242 |
> |
* |
1243 |
> |
* @return the set view |
1244 |
> |
*/ |
1245 |
> |
public Set<Map.Entry<K,V>> entrySet() { |
1246 |
> |
EntrySetView<K,V> es; |
1247 |
> |
return (es = entrySet) != null ? es : (entrySet = new EntrySetView<K,V>(this)); |
1248 |
> |
} |
1249 |
> |
|
1250 |
> |
/** |
1251 |
> |
* Returns the hash code value for this {@link Map}, i.e., |
1252 |
> |
* the sum of, for each key-value pair in the map, |
1253 |
> |
* {@code key.hashCode() ^ value.hashCode()}. |
1254 |
> |
* |
1255 |
> |
* @return the hash code value for this map |
1256 |
> |
*/ |
1257 |
> |
public int hashCode() { |
1258 |
> |
int h = 0; |
1259 |
> |
Node<K,V>[] t; |
1260 |
> |
if ((t = table) != null) { |
1261 |
> |
Traverser<K,V> it = new Traverser<K,V>(t, t.length, 0, t.length); |
1262 |
> |
for (Node<K,V> p; (p = it.advance()) != null; ) |
1263 |
> |
h += p.key.hashCode() ^ p.val.hashCode(); |
1264 |
> |
} |
1265 |
> |
return h; |
1266 |
> |
} |
1267 |
> |
|
1268 |
> |
/** |
1269 |
> |
* Returns a string representation of this map. The string |
1270 |
> |
* representation consists of a list of key-value mappings (in no |
1271 |
> |
* particular order) enclosed in braces ("{@code {}}"). Adjacent |
1272 |
> |
* mappings are separated by the characters {@code ", "} (comma |
1273 |
> |
* and space). Each key-value mapping is rendered as the key |
1274 |
> |
* followed by an equals sign ("{@code =}") followed by the |
1275 |
> |
* associated value. |
1276 |
> |
* |
1277 |
> |
* @return a string representation of this map |
1278 |
> |
*/ |
1279 |
> |
public String toString() { |
1280 |
> |
Node<K,V>[] t; |
1281 |
> |
int f = (t = table) == null ? 0 : t.length; |
1282 |
> |
Traverser<K,V> it = new Traverser<K,V>(t, f, 0, f); |
1283 |
> |
StringBuilder sb = new StringBuilder(); |
1284 |
> |
sb.append('{'); |
1285 |
> |
Node<K,V> p; |
1286 |
> |
if ((p = it.advance()) != null) { |
1287 |
> |
for (;;) { |
1288 |
> |
K k = p.key; |
1289 |
> |
V v = p.val; |
1290 |
> |
sb.append(k == this ? "(this Map)" : k); |
1291 |
> |
sb.append('='); |
1292 |
> |
sb.append(v == this ? "(this Map)" : v); |
1293 |
> |
if ((p = it.advance()) == null) |
1294 |
|
break; |
1295 |
< |
} |
1295 |
> |
sb.append(',').append(' '); |
1296 |
|
} |
1297 |
|
} |
1298 |
< |
return oldVal; |
1298 |
> |
return sb.append('}').toString(); |
1299 |
|
} |
1300 |
|
|
1301 |
< |
/* |
1302 |
< |
* Internal versions of insertion methods |
1303 |
< |
* All have the same basic structure as the first (internalPut): |
1304 |
< |
* 1. If table uninitialized, create |
1305 |
< |
* 2. If bin empty, try to CAS new node |
1306 |
< |
* 3. If bin stale, use new table |
1307 |
< |
* 4. if bin converted to TreeBin, validate and relay to TreeBin methods |
1308 |
< |
* 5. Lock and validate; if valid, scan and add or update |
1309 |
< |
* |
1220 |
< |
* The putAll method differs mainly in attempting to pre-allocate |
1221 |
< |
* enough table space, and also more lazily performs count updates |
1222 |
< |
* and checks. |
1223 |
< |
* |
1224 |
< |
* Most of the function-accepting methods can't be factored nicely |
1225 |
< |
* because they require different functional forms, so instead |
1226 |
< |
* sprawl out similar mechanics. |
1301 |
> |
/** |
1302 |
> |
* Compares the specified object with this map for equality. |
1303 |
> |
* Returns {@code true} if the given object is a map with the same |
1304 |
> |
* mappings as this map. This operation may return misleading |
1305 |
> |
* results if either map is concurrently modified during execution |
1306 |
> |
* of this method. |
1307 |
> |
* |
1308 |
> |
* @param o object to be compared for equality with this map |
1309 |
> |
* @return {@code true} if the specified object is equal to this map |
1310 |
|
*/ |
1311 |
+ |
public boolean equals(Object o) { |
1312 |
+ |
if (o != this) { |
1313 |
+ |
if (!(o instanceof Map)) |
1314 |
+ |
return false; |
1315 |
+ |
Map<?,?> m = (Map<?,?>) o; |
1316 |
+ |
Node<K,V>[] t; |
1317 |
+ |
int f = (t = table) == null ? 0 : t.length; |
1318 |
+ |
Traverser<K,V> it = new Traverser<K,V>(t, f, 0, f); |
1319 |
+ |
for (Node<K,V> p; (p = it.advance()) != null; ) { |
1320 |
+ |
V val = p.val; |
1321 |
+ |
Object v = m.get(p.key); |
1322 |
+ |
if (v == null || (v != val && !v.equals(val))) |
1323 |
+ |
return false; |
1324 |
+ |
} |
1325 |
+ |
for (Map.Entry<?,?> e : m.entrySet()) { |
1326 |
+ |
Object mk, mv, v; |
1327 |
+ |
if ((mk = e.getKey()) == null || |
1328 |
+ |
(mv = e.getValue()) == null || |
1329 |
+ |
(v = get(mk)) == null || |
1330 |
+ |
(mv != v && !mv.equals(v))) |
1331 |
+ |
return false; |
1332 |
+ |
} |
1333 |
+ |
} |
1334 |
+ |
return true; |
1335 |
+ |
} |
1336 |
|
|
1337 |
< |
/** Implementation for put and putIfAbsent */ |
1338 |
< |
@SuppressWarnings("unchecked") private final V internalPut |
1339 |
< |
(K k, V v, boolean onlyIfAbsent) { |
1340 |
< |
if (k == null || v == null) throw new NullPointerException(); |
1341 |
< |
int h = spread(k.hashCode()); |
1342 |
< |
int len = 0; |
1343 |
< |
for (Node<V>[] tab = table;;) { |
1344 |
< |
int i, fh; Node<V> f; Object fk; V fv; |
1345 |
< |
if (tab == null) |
1346 |
< |
tab = initTable(); |
1347 |
< |
else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) { |
1348 |
< |
if (casTabAt(tab, i, null, new Node<V>(h, k, v, null))) |
1349 |
< |
break; // no lock when adding to empty bin |
1337 |
> |
/** |
1338 |
> |
* Stripped-down version of helper class used in previous version, |
1339 |
> |
* declared for the sake of serialization compatibility |
1340 |
> |
*/ |
1341 |
> |
static class Segment<K,V> extends ReentrantLock implements Serializable { |
1342 |
> |
private static final long serialVersionUID = 2249069246763182397L; |
1343 |
> |
final float loadFactor; |
1344 |
> |
Segment(float lf) { this.loadFactor = lf; } |
1345 |
> |
} |
1346 |
> |
|
1347 |
> |
/** |
1348 |
> |
* Saves the state of the {@code ConcurrentHashMap} instance to a |
1349 |
> |
* stream (i.e., serializes it). |
1350 |
> |
* @param s the stream |
1351 |
> |
* @throws java.io.IOException if an I/O error occurs |
1352 |
> |
* @serialData |
1353 |
> |
* the key (Object) and value (Object) |
1354 |
> |
* for each key-value mapping, followed by a null pair. |
1355 |
> |
* The key-value mappings are emitted in no particular order. |
1356 |
> |
*/ |
1357 |
> |
private void writeObject(java.io.ObjectOutputStream s) |
1358 |
> |
throws java.io.IOException { |
1359 |
> |
// For serialization compatibility |
1360 |
> |
// Emulate segment calculation from previous version of this class |
1361 |
> |
int sshift = 0; |
1362 |
> |
int ssize = 1; |
1363 |
> |
while (ssize < DEFAULT_CONCURRENCY_LEVEL) { |
1364 |
> |
++sshift; |
1365 |
> |
ssize <<= 1; |
1366 |
> |
} |
1367 |
> |
int segmentShift = 32 - sshift; |
1368 |
> |
int segmentMask = ssize - 1; |
1369 |
> |
@SuppressWarnings("unchecked") |
1370 |
> |
Segment<K,V>[] segments = (Segment<K,V>[]) |
1371 |
> |
new Segment<?,?>[DEFAULT_CONCURRENCY_LEVEL]; |
1372 |
> |
for (int i = 0; i < segments.length; ++i) |
1373 |
> |
segments[i] = new Segment<K,V>(LOAD_FACTOR); |
1374 |
> |
s.putFields().put("segments", segments); |
1375 |
> |
s.putFields().put("segmentShift", segmentShift); |
1376 |
> |
s.putFields().put("segmentMask", segmentMask); |
1377 |
> |
s.writeFields(); |
1378 |
> |
|
1379 |
> |
Node<K,V>[] t; |
1380 |
> |
if ((t = table) != null) { |
1381 |
> |
Traverser<K,V> it = new Traverser<K,V>(t, t.length, 0, t.length); |
1382 |
> |
for (Node<K,V> p; (p = it.advance()) != null; ) { |
1383 |
> |
s.writeObject(p.key); |
1384 |
> |
s.writeObject(p.val); |
1385 |
|
} |
1386 |
< |
else if ((fh = f.hash) < 0) { |
1387 |
< |
if ((fk = f.key) instanceof TreeBin) { |
1388 |
< |
TreeBin<V> t = (TreeBin<V>)fk; |
1389 |
< |
V oldVal = null; |
1390 |
< |
t.acquire(0); |
1391 |
< |
try { |
1392 |
< |
if (tabAt(tab, i) == f) { |
1393 |
< |
len = 2; |
1394 |
< |
TreeNode<V> p = t.putTreeNode(h, k, v); |
1395 |
< |
if (p != null) { |
1396 |
< |
oldVal = p.val; |
1397 |
< |
if (!onlyIfAbsent) |
1398 |
< |
p.val = v; |
1399 |
< |
} |
1400 |
< |
} |
1401 |
< |
} finally { |
1402 |
< |
t.release(0); |
1403 |
< |
} |
1404 |
< |
if (len != 0) { |
1405 |
< |
if (oldVal != null) |
1406 |
< |
return oldVal; |
1407 |
< |
break; |
1408 |
< |
} |
1409 |
< |
} |
1410 |
< |
else |
1411 |
< |
tab = (Node<V>[])fk; |
1386 |
> |
} |
1387 |
> |
s.writeObject(null); |
1388 |
> |
s.writeObject(null); |
1389 |
> |
segments = null; // throw away |
1390 |
> |
} |
1391 |
> |
|
1392 |
> |
/** |
1393 |
> |
* Reconstitutes the instance from a stream (that is, deserializes it). |
1394 |
> |
* @param s the stream |
1395 |
> |
* @throws ClassNotFoundException if the class of a serialized object |
1396 |
> |
* could not be found |
1397 |
> |
* @throws java.io.IOException if an I/O error occurs |
1398 |
> |
*/ |
1399 |
> |
private void readObject(java.io.ObjectInputStream s) |
1400 |
> |
throws java.io.IOException, ClassNotFoundException { |
1401 |
> |
/* |
1402 |
> |
* To improve performance in typical cases, we create nodes |
1403 |
> |
* while reading, then place in table once size is known. |
1404 |
> |
* However, we must also validate uniqueness and deal with |
1405 |
> |
* overpopulated bins while doing so, which requires |
1406 |
> |
* specialized versions of putVal mechanics. |
1407 |
> |
*/ |
1408 |
> |
sizeCtl = -1; // force exclusion for table construction |
1409 |
> |
s.defaultReadObject(); |
1410 |
> |
long size = 0L; |
1411 |
> |
Node<K,V> p = null; |
1412 |
> |
for (;;) { |
1413 |
> |
@SuppressWarnings("unchecked") |
1414 |
> |
K k = (K) s.readObject(); |
1415 |
> |
@SuppressWarnings("unchecked") |
1416 |
> |
V v = (V) s.readObject(); |
1417 |
> |
if (k != null && v != null) { |
1418 |
> |
p = new Node<K,V>(spread(k.hashCode()), k, v, p); |
1419 |
> |
++size; |
1420 |
|
} |
1421 |
< |
else if (onlyIfAbsent && fh == h && (fv = f.val) != null && |
1422 |
< |
((fk = f.key) == k || k.equals(fk))) // peek while nearby |
1423 |
< |
return fv; |
1421 |
> |
else |
1422 |
> |
break; |
1423 |
> |
} |
1424 |
> |
if (size == 0L) |
1425 |
> |
sizeCtl = 0; |
1426 |
> |
else { |
1427 |
> |
int n; |
1428 |
> |
if (size >= (long)(MAXIMUM_CAPACITY >>> 1)) |
1429 |
> |
n = MAXIMUM_CAPACITY; |
1430 |
|
else { |
1431 |
< |
V oldVal = null; |
1432 |
< |
synchronized (f) { |
1433 |
< |
if (tabAt(tab, i) == f) { |
1434 |
< |
len = 1; |
1435 |
< |
for (Node<V> e = f;; ++len) { |
1436 |
< |
Object ek; V ev; |
1437 |
< |
if (e.hash == h && |
1438 |
< |
(ev = e.val) != null && |
1439 |
< |
((ek = e.key) == k || k.equals(ek))) { |
1440 |
< |
oldVal = ev; |
1441 |
< |
if (!onlyIfAbsent) |
1442 |
< |
e.val = v; |
1431 |
> |
int sz = (int)size; |
1432 |
> |
n = tableSizeFor(sz + (sz >>> 1) + 1); |
1433 |
> |
} |
1434 |
> |
@SuppressWarnings("unchecked") |
1435 |
> |
Node<K,V>[] tab = (Node<K,V>[])new Node<?,?>[n]; |
1436 |
> |
int mask = n - 1; |
1437 |
> |
long added = 0L; |
1438 |
> |
while (p != null) { |
1439 |
> |
boolean insertAtFront; |
1440 |
> |
Node<K,V> next = p.next, first; |
1441 |
> |
int h = p.hash, j = h & mask; |
1442 |
> |
if ((first = tabAt(tab, j)) == null) |
1443 |
> |
insertAtFront = true; |
1444 |
> |
else { |
1445 |
> |
K k = p.key; |
1446 |
> |
if (first.hash < 0) { |
1447 |
> |
TreeBin<K,V> t = (TreeBin<K,V>)first; |
1448 |
> |
if (t.putTreeVal(h, k, p.val) == null) |
1449 |
> |
++added; |
1450 |
> |
insertAtFront = false; |
1451 |
> |
} |
1452 |
> |
else { |
1453 |
> |
int binCount = 0; |
1454 |
> |
insertAtFront = true; |
1455 |
> |
Node<K,V> q; K qk; |
1456 |
> |
for (q = first; q != null; q = q.next) { |
1457 |
> |
if (q.hash == h && |
1458 |
> |
((qk = q.key) == k || |
1459 |
> |
(qk != null && k.equals(qk)))) { |
1460 |
> |
insertAtFront = false; |
1461 |
|
break; |
1462 |
|
} |
1463 |
< |
Node<V> last = e; |
1464 |
< |
if ((e = e.next) == null) { |
1465 |
< |
last.next = new Node<V>(h, k, v, null); |
1466 |
< |
if (len >= TREE_THRESHOLD) |
1467 |
< |
replaceWithTreeBin(tab, i, k); |
1468 |
< |
break; |
1463 |
> |
++binCount; |
1464 |
> |
} |
1465 |
> |
if (insertAtFront && binCount >= TREEIFY_THRESHOLD) { |
1466 |
> |
insertAtFront = false; |
1467 |
> |
++added; |
1468 |
> |
p.next = first; |
1469 |
> |
TreeNode<K,V> hd = null, tl = null; |
1470 |
> |
for (q = p; q != null; q = q.next) { |
1471 |
> |
TreeNode<K,V> t = new TreeNode<K,V> |
1472 |
> |
(q.hash, q.key, q.val, null, null); |
1473 |
> |
if ((t.prev = tl) == null) |
1474 |
> |
hd = t; |
1475 |
> |
else |
1476 |
> |
tl.next = t; |
1477 |
> |
tl = t; |
1478 |
|
} |
1479 |
+ |
setTabAt(tab, j, new TreeBin<K,V>(hd)); |
1480 |
|
} |
1481 |
|
} |
1482 |
|
} |
1483 |
< |
if (len != 0) { |
1484 |
< |
if (oldVal != null) |
1485 |
< |
return oldVal; |
1486 |
< |
break; |
1483 |
> |
if (insertAtFront) { |
1484 |
> |
++added; |
1485 |
> |
p.next = first; |
1486 |
> |
setTabAt(tab, j, p); |
1487 |
|
} |
1488 |
+ |
p = next; |
1489 |
|
} |
1490 |
+ |
table = tab; |
1491 |
+ |
sizeCtl = n - (n >>> 2); |
1492 |
+ |
baseCount = added; |
1493 |
|
} |
1305 |
– |
addCount(1L, len); |
1306 |
– |
return null; |
1494 |
|
} |
1495 |
|
|
1496 |
< |
/** Implementation for computeIfAbsent */ |
1497 |
< |
@SuppressWarnings("unchecked") private final V internalComputeIfAbsent |
1498 |
< |
(K k, Function<? super K, ? extends V> mf) { |
1499 |
< |
if (k == null || mf == null) |
1496 |
> |
// ConcurrentMap methods |
1497 |
> |
|
1498 |
> |
/** |
1499 |
> |
* {@inheritDoc} |
1500 |
> |
* |
1501 |
> |
* @return the previous value associated with the specified key, |
1502 |
> |
* or {@code null} if there was no mapping for the key |
1503 |
> |
* @throws NullPointerException if the specified key or value is null |
1504 |
> |
*/ |
1505 |
> |
public V putIfAbsent(K key, V value) { |
1506 |
> |
return putVal(key, value, true); |
1507 |
> |
} |
1508 |
> |
|
1509 |
> |
/** |
1510 |
> |
* {@inheritDoc} |
1511 |
> |
* |
1512 |
> |
* @throws NullPointerException if the specified key is null |
1513 |
> |
*/ |
1514 |
> |
public boolean remove(Object key, Object value) { |
1515 |
> |
if (key == null) |
1516 |
|
throw new NullPointerException(); |
1517 |
< |
int h = spread(k.hashCode()); |
1517 |
> |
return value != null && replaceNode(key, null, value) != null; |
1518 |
> |
} |
1519 |
> |
|
1520 |
> |
/** |
1521 |
> |
* {@inheritDoc} |
1522 |
> |
* |
1523 |
> |
* @throws NullPointerException if any of the arguments are null |
1524 |
> |
*/ |
1525 |
> |
public boolean replace(K key, V oldValue, V newValue) { |
1526 |
> |
if (key == null || oldValue == null || newValue == null) |
1527 |
> |
throw new NullPointerException(); |
1528 |
> |
return replaceNode(key, newValue, oldValue) != null; |
1529 |
> |
} |
1530 |
> |
|
1531 |
> |
/** |
1532 |
> |
* {@inheritDoc} |
1533 |
> |
* |
1534 |
> |
* @return the previous value associated with the specified key, |
1535 |
> |
* or {@code null} if there was no mapping for the key |
1536 |
> |
* @throws NullPointerException if the specified key or value is null |
1537 |
> |
*/ |
1538 |
> |
public V replace(K key, V value) { |
1539 |
> |
if (key == null || value == null) |
1540 |
> |
throw new NullPointerException(); |
1541 |
> |
return replaceNode(key, value, null); |
1542 |
> |
} |
1543 |
> |
|
1544 |
> |
// Overrides of JDK8+ Map extension method defaults |
1545 |
> |
|
1546 |
> |
/** |
1547 |
> |
* Returns the value to which the specified key is mapped, or the |
1548 |
> |
* given default value if this map contains no mapping for the |
1549 |
> |
* key. |
1550 |
> |
* |
1551 |
> |
* @param key the key whose associated value is to be returned |
1552 |
> |
* @param defaultValue the value to return if this map contains |
1553 |
> |
* no mapping for the given key |
1554 |
> |
* @return the mapping for the key, if present; else the default value |
1555 |
> |
* @throws NullPointerException if the specified key is null |
1556 |
> |
*/ |
1557 |
> |
public V getOrDefault(Object key, V defaultValue) { |
1558 |
> |
V v; |
1559 |
> |
return (v = get(key)) == null ? defaultValue : v; |
1560 |
> |
} |
1561 |
> |
|
1562 |
> |
public void forEach(BiConsumer<? super K, ? super V> action) { |
1563 |
> |
if (action == null) throw new NullPointerException(); |
1564 |
> |
Node<K,V>[] t; |
1565 |
> |
if ((t = table) != null) { |
1566 |
> |
Traverser<K,V> it = new Traverser<K,V>(t, t.length, 0, t.length); |
1567 |
> |
for (Node<K,V> p; (p = it.advance()) != null; ) { |
1568 |
> |
action.accept(p.key, p.val); |
1569 |
> |
} |
1570 |
> |
} |
1571 |
> |
} |
1572 |
> |
|
1573 |
> |
public void replaceAll(BiFunction<? super K, ? super V, ? extends V> function) { |
1574 |
> |
if (function == null) throw new NullPointerException(); |
1575 |
> |
Node<K,V>[] t; |
1576 |
> |
if ((t = table) != null) { |
1577 |
> |
Traverser<K,V> it = new Traverser<K,V>(t, t.length, 0, t.length); |
1578 |
> |
for (Node<K,V> p; (p = it.advance()) != null; ) { |
1579 |
> |
V oldValue = p.val; |
1580 |
> |
for (K key = p.key;;) { |
1581 |
> |
V newValue = function.apply(key, oldValue); |
1582 |
> |
if (newValue == null) |
1583 |
> |
throw new NullPointerException(); |
1584 |
> |
if (replaceNode(key, newValue, oldValue) != null || |
1585 |
> |
(oldValue = get(key)) == null) |
1586 |
> |
break; |
1587 |
> |
} |
1588 |
> |
} |
1589 |
> |
} |
1590 |
> |
} |
1591 |
> |
|
1592 |
> |
/** |
1593 |
> |
* If the specified key is not already associated with a value, |
1594 |
> |
* attempts to compute its value using the given mapping function |
1595 |
> |
* and enters it into this map unless {@code null}. The entire |
1596 |
> |
* method invocation is performed atomically, so the function is |
1597 |
> |
* applied at most once per key. Some attempted update operations |
1598 |
> |
* on this map by other threads may be blocked while computation |
1599 |
> |
* is in progress, so the computation should be short and simple, |
1600 |
> |
* and must not attempt to update any other mappings of this map. |
1601 |
> |
* |
1602 |
> |
* @param key key with which the specified value is to be associated |
1603 |
> |
* @param mappingFunction the function to compute a value |
1604 |
> |
* @return the current (existing or computed) value associated with |
1605 |
> |
* the specified key, or null if the computed value is null |
1606 |
> |
* @throws NullPointerException if the specified key or mappingFunction |
1607 |
> |
* is null |
1608 |
> |
* @throws IllegalStateException if the computation detectably |
1609 |
> |
* attempts a recursive update to this map that would |
1610 |
> |
* otherwise never complete |
1611 |
> |
* @throws RuntimeException or Error if the mappingFunction does so, |
1612 |
> |
* in which case the mapping is left unestablished |
1613 |
> |
*/ |
1614 |
> |
public V computeIfAbsent(K key, Function<? super K, ? extends V> mappingFunction) { |
1615 |
> |
if (key == null || mappingFunction == null) |
1616 |
> |
throw new NullPointerException(); |
1617 |
> |
int h = spread(key.hashCode()); |
1618 |
|
V val = null; |
1619 |
< |
int len = 0; |
1620 |
< |
for (Node<V>[] tab = table;;) { |
1621 |
< |
Node<V> f; int i; Object fk; |
1622 |
< |
if (tab == null) |
1619 |
> |
int binCount = 0; |
1620 |
> |
for (Node<K,V>[] tab = table;;) { |
1621 |
> |
Node<K,V> f; int n, i, fh; |
1622 |
> |
if (tab == null || (n = tab.length) == 0) |
1623 |
|
tab = initTable(); |
1624 |
< |
else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) { |
1625 |
< |
Node<V> node = new Node<V>(h, k, null, null); |
1626 |
< |
synchronized (node) { |
1627 |
< |
if (casTabAt(tab, i, null, node)) { |
1628 |
< |
len = 1; |
1624 |
> |
else if ((f = tabAt(tab, i = (n - 1) & h)) == null) { |
1625 |
> |
Node<K,V> r = new ReservationNode<K,V>(); |
1626 |
> |
synchronized (r) { |
1627 |
> |
if (casTabAt(tab, i, null, r)) { |
1628 |
> |
binCount = 1; |
1629 |
> |
Node<K,V> node = null; |
1630 |
|
try { |
1631 |
< |
if ((val = mf.apply(k)) != null) |
1632 |
< |
node.val = val; |
1631 |
> |
if ((val = mappingFunction.apply(key)) != null) |
1632 |
> |
node = new Node<K,V>(h, key, val, null); |
1633 |
|
} finally { |
1634 |
< |
if (val == null) |
1331 |
< |
setTabAt(tab, i, null); |
1634 |
> |
setTabAt(tab, i, node); |
1635 |
|
} |
1636 |
|
} |
1637 |
|
} |
1638 |
< |
if (len != 0) |
1638 |
> |
if (binCount != 0) |
1639 |
|
break; |
1640 |
|
} |
1641 |
< |
else if (f.hash < 0) { |
1642 |
< |
if ((fk = f.key) instanceof TreeBin) { |
1643 |
< |
TreeBin<V> t = (TreeBin<V>)fk; |
1644 |
< |
boolean added = false; |
1645 |
< |
t.acquire(0); |
1646 |
< |
try { |
1647 |
< |
if (tabAt(tab, i) == f) { |
1648 |
< |
len = 1; |
1649 |
< |
TreeNode<V> p = t.getTreeNode(h, k, t.root); |
1650 |
< |
if (p != null) |
1641 |
> |
else if ((fh = f.hash) == MOVED) |
1642 |
> |
tab = helpTransfer(tab, f); |
1643 |
> |
else { |
1644 |
> |
boolean added = false; |
1645 |
> |
synchronized (f) { |
1646 |
> |
if (tabAt(tab, i) == f) { |
1647 |
> |
if (fh >= 0) { |
1648 |
> |
binCount = 1; |
1649 |
> |
for (Node<K,V> e = f;; ++binCount) { |
1650 |
> |
K ek; V ev; |
1651 |
> |
if (e.hash == h && |
1652 |
> |
((ek = e.key) == key || |
1653 |
> |
(ek != null && key.equals(ek)))) { |
1654 |
> |
val = e.val; |
1655 |
> |
break; |
1656 |
> |
} |
1657 |
> |
Node<K,V> pred = e; |
1658 |
> |
if ((e = e.next) == null) { |
1659 |
> |
if ((val = mappingFunction.apply(key)) != null) { |
1660 |
> |
added = true; |
1661 |
> |
pred.next = new Node<K,V>(h, key, val, null); |
1662 |
> |
} |
1663 |
> |
break; |
1664 |
> |
} |
1665 |
> |
} |
1666 |
> |
} |
1667 |
> |
else if (f instanceof TreeBin) { |
1668 |
> |
binCount = 2; |
1669 |
> |
TreeBin<K,V> t = (TreeBin<K,V>)f; |
1670 |
> |
TreeNode<K,V> r, p; |
1671 |
> |
if ((r = t.root) != null && |
1672 |
> |
(p = r.findTreeNode(h, key, null)) != null) |
1673 |
|
val = p.val; |
1674 |
< |
else if ((val = mf.apply(k)) != null) { |
1674 |
> |
else if ((val = mappingFunction.apply(key)) != null) { |
1675 |
|
added = true; |
1676 |
< |
len = 2; |
1352 |
< |
t.putTreeNode(h, k, val); |
1676 |
> |
t.putTreeVal(h, key, val); |
1677 |
|
} |
1678 |
|
} |
1355 |
– |
} finally { |
1356 |
– |
t.release(0); |
1357 |
– |
} |
1358 |
– |
if (len != 0) { |
1359 |
– |
if (!added) |
1360 |
– |
return val; |
1361 |
– |
break; |
1679 |
|
} |
1680 |
|
} |
1681 |
< |
else |
1682 |
< |
tab = (Node<V>[])fk; |
1681 |
> |
if (binCount != 0) { |
1682 |
> |
if (binCount >= TREEIFY_THRESHOLD) |
1683 |
> |
treeifyBin(tab, i); |
1684 |
> |
if (!added) |
1685 |
> |
return val; |
1686 |
> |
break; |
1687 |
> |
} |
1688 |
|
} |
1689 |
+ |
} |
1690 |
+ |
if (val != null) |
1691 |
+ |
addCount(1L, binCount); |
1692 |
+ |
return val; |
1693 |
+ |
} |
1694 |
+ |
|
1695 |
+ |
/** |
1696 |
+ |
* If the value for the specified key is present, attempts to |
1697 |
+ |
* compute a new mapping given the key and its current mapped |
1698 |
+ |
* value. The entire method invocation is performed atomically. |
1699 |
+ |
* Some attempted update operations on this map by other threads |
1700 |
+ |
* may be blocked while computation is in progress, so the |
1701 |
+ |
* computation should be short and simple, and must not attempt to |
1702 |
+ |
* update any other mappings of this map. |
1703 |
+ |
* |
1704 |
+ |
* @param key key with which a value may be associated |
1705 |
+ |
* @param remappingFunction the function to compute a value |
1706 |
+ |
* @return the new value associated with the specified key, or null if none |
1707 |
+ |
* @throws NullPointerException if the specified key or remappingFunction |
1708 |
+ |
* is null |
1709 |
+ |
* @throws IllegalStateException if the computation detectably |
1710 |
+ |
* attempts a recursive update to this map that would |
1711 |
+ |
* otherwise never complete |
1712 |
+ |
* @throws RuntimeException or Error if the remappingFunction does so, |
1713 |
+ |
* in which case the mapping is unchanged |
1714 |
+ |
*/ |
1715 |
+ |
public V computeIfPresent(K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) { |
1716 |
+ |
if (key == null || remappingFunction == null) |
1717 |
+ |
throw new NullPointerException(); |
1718 |
+ |
int h = spread(key.hashCode()); |
1719 |
+ |
V val = null; |
1720 |
+ |
int delta = 0; |
1721 |
+ |
int binCount = 0; |
1722 |
+ |
for (Node<K,V>[] tab = table;;) { |
1723 |
+ |
Node<K,V> f; int n, i, fh; |
1724 |
+ |
if (tab == null || (n = tab.length) == 0) |
1725 |
+ |
tab = initTable(); |
1726 |
+ |
else if ((f = tabAt(tab, i = (n - 1) & h)) == null) |
1727 |
+ |
break; |
1728 |
+ |
else if ((fh = f.hash) == MOVED) |
1729 |
+ |
tab = helpTransfer(tab, f); |
1730 |
|
else { |
1368 |
– |
for (Node<V> e = f; e != null; e = e.next) { // prescan |
1369 |
– |
Object ek; V ev; |
1370 |
– |
if (e.hash == h && (ev = e.val) != null && |
1371 |
– |
((ek = e.key) == k || k.equals(ek))) |
1372 |
– |
return ev; |
1373 |
– |
} |
1374 |
– |
boolean added = false; |
1731 |
|
synchronized (f) { |
1732 |
|
if (tabAt(tab, i) == f) { |
1733 |
< |
len = 1; |
1734 |
< |
for (Node<V> e = f;; ++len) { |
1735 |
< |
Object ek; V ev; |
1736 |
< |
if (e.hash == h && |
1737 |
< |
(ev = e.val) != null && |
1738 |
< |
((ek = e.key) == k || k.equals(ek))) { |
1739 |
< |
val = ev; |
1740 |
< |
break; |
1733 |
> |
if (fh >= 0) { |
1734 |
> |
binCount = 1; |
1735 |
> |
for (Node<K,V> e = f, pred = null;; ++binCount) { |
1736 |
> |
K ek; |
1737 |
> |
if (e.hash == h && |
1738 |
> |
((ek = e.key) == key || |
1739 |
> |
(ek != null && key.equals(ek)))) { |
1740 |
> |
val = remappingFunction.apply(key, e.val); |
1741 |
> |
if (val != null) |
1742 |
> |
e.val = val; |
1743 |
> |
else { |
1744 |
> |
delta = -1; |
1745 |
> |
Node<K,V> en = e.next; |
1746 |
> |
if (pred != null) |
1747 |
> |
pred.next = en; |
1748 |
> |
else |
1749 |
> |
setTabAt(tab, i, en); |
1750 |
> |
} |
1751 |
> |
break; |
1752 |
> |
} |
1753 |
> |
pred = e; |
1754 |
> |
if ((e = e.next) == null) |
1755 |
> |
break; |
1756 |
|
} |
1757 |
< |
Node<V> last = e; |
1758 |
< |
if ((e = e.next) == null) { |
1759 |
< |
if ((val = mf.apply(k)) != null) { |
1760 |
< |
added = true; |
1761 |
< |
last.next = new Node<V>(h, k, val, null); |
1762 |
< |
if (len >= TREE_THRESHOLD) |
1763 |
< |
replaceWithTreeBin(tab, i, k); |
1757 |
> |
} |
1758 |
> |
else if (f instanceof TreeBin) { |
1759 |
> |
binCount = 2; |
1760 |
> |
TreeBin<K,V> t = (TreeBin<K,V>)f; |
1761 |
> |
TreeNode<K,V> r, p; |
1762 |
> |
if ((r = t.root) != null && |
1763 |
> |
(p = r.findTreeNode(h, key, null)) != null) { |
1764 |
> |
val = remappingFunction.apply(key, p.val); |
1765 |
> |
if (val != null) |
1766 |
> |
p.val = val; |
1767 |
> |
else { |
1768 |
> |
delta = -1; |
1769 |
> |
if (t.removeTreeNode(p)) |
1770 |
> |
setTabAt(tab, i, untreeify(t.first)); |
1771 |
|
} |
1394 |
– |
break; |
1772 |
|
} |
1773 |
|
} |
1774 |
|
} |
1775 |
|
} |
1776 |
< |
if (len != 0) { |
1400 |
< |
if (!added) |
1401 |
< |
return val; |
1776 |
> |
if (binCount != 0) |
1777 |
|
break; |
1403 |
– |
} |
1778 |
|
} |
1779 |
|
} |
1780 |
< |
if (val != null) |
1781 |
< |
addCount(1L, len); |
1780 |
> |
if (delta != 0) |
1781 |
> |
addCount((long)delta, binCount); |
1782 |
|
return val; |
1783 |
|
} |
1784 |
|
|
1785 |
< |
/** Implementation for compute */ |
1786 |
< |
@SuppressWarnings("unchecked") private final V internalCompute |
1787 |
< |
(K k, boolean onlyIfPresent, |
1788 |
< |
BiFunction<? super K, ? super V, ? extends V> mf) { |
1789 |
< |
if (k == null || mf == null) |
1785 |
> |
/** |
1786 |
> |
* Attempts to compute a mapping for the specified key and its |
1787 |
> |
* current mapped value (or {@code null} if there is no current |
1788 |
> |
* mapping). The entire method invocation is performed atomically. |
1789 |
> |
* Some attempted update operations on this map by other threads |
1790 |
> |
* may be blocked while computation is in progress, so the |
1791 |
> |
* computation should be short and simple, and must not attempt to |
1792 |
> |
* update any other mappings of this Map. |
1793 |
> |
* |
1794 |
> |
* @param key key with which the specified value is to be associated |
1795 |
> |
* @param remappingFunction the function to compute a value |
1796 |
> |
* @return the new value associated with the specified key, or null if none |
1797 |
> |
* @throws NullPointerException if the specified key or remappingFunction |
1798 |
> |
* is null |
1799 |
> |
* @throws IllegalStateException if the computation detectably |
1800 |
> |
* attempts a recursive update to this map that would |
1801 |
> |
* otherwise never complete |
1802 |
> |
* @throws RuntimeException or Error if the remappingFunction does so, |
1803 |
> |
* in which case the mapping is unchanged |
1804 |
> |
*/ |
1805 |
> |
public V compute(K key, |
1806 |
> |
BiFunction<? super K, ? super V, ? extends V> remappingFunction) { |
1807 |
> |
if (key == null || remappingFunction == null) |
1808 |
|
throw new NullPointerException(); |
1809 |
< |
int h = spread(k.hashCode()); |
1809 |
> |
int h = spread(key.hashCode()); |
1810 |
|
V val = null; |
1811 |
|
int delta = 0; |
1812 |
< |
int len = 0; |
1813 |
< |
for (Node<V>[] tab = table;;) { |
1814 |
< |
Node<V> f; int i, fh; Object fk; |
1815 |
< |
if (tab == null) |
1812 |
> |
int binCount = 0; |
1813 |
> |
for (Node<K,V>[] tab = table;;) { |
1814 |
> |
Node<K,V> f; int n, i, fh; |
1815 |
> |
if (tab == null || (n = tab.length) == 0) |
1816 |
|
tab = initTable(); |
1817 |
< |
else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) { |
1818 |
< |
if (onlyIfPresent) |
1819 |
< |
break; |
1820 |
< |
Node<V> node = new Node<V>(h, k, null, null); |
1821 |
< |
synchronized (node) { |
1822 |
< |
if (casTabAt(tab, i, null, node)) { |
1817 |
> |
else if ((f = tabAt(tab, i = (n - 1) & h)) == null) { |
1818 |
> |
Node<K,V> r = new ReservationNode<K,V>(); |
1819 |
> |
synchronized (r) { |
1820 |
> |
if (casTabAt(tab, i, null, r)) { |
1821 |
> |
binCount = 1; |
1822 |
> |
Node<K,V> node = null; |
1823 |
|
try { |
1824 |
< |
len = 1; |
1433 |
< |
if ((val = mf.apply(k, null)) != null) { |
1434 |
< |
node.val = val; |
1824 |
> |
if ((val = remappingFunction.apply(key, null)) != null) { |
1825 |
|
delta = 1; |
1826 |
+ |
node = new Node<K,V>(h, key, val, null); |
1827 |
|
} |
1828 |
|
} finally { |
1829 |
< |
if (delta == 0) |
1439 |
< |
setTabAt(tab, i, null); |
1829 |
> |
setTabAt(tab, i, node); |
1830 |
|
} |
1831 |
|
} |
1832 |
|
} |
1833 |
< |
if (len != 0) |
1833 |
> |
if (binCount != 0) |
1834 |
|
break; |
1835 |
|
} |
1836 |
< |
else if ((fh = f.hash) < 0) { |
1837 |
< |
if ((fk = f.key) instanceof TreeBin) { |
1838 |
< |
TreeBin<V> t = (TreeBin<V>)fk; |
1839 |
< |
t.acquire(0); |
1840 |
< |
try { |
1841 |
< |
if (tabAt(tab, i) == f) { |
1842 |
< |
len = 1; |
1843 |
< |
TreeNode<V> p = t.getTreeNode(h, k, t.root); |
1844 |
< |
if (p == null && onlyIfPresent) |
1845 |
< |
break; |
1836 |
> |
else if ((fh = f.hash) == MOVED) |
1837 |
> |
tab = helpTransfer(tab, f); |
1838 |
> |
else { |
1839 |
> |
synchronized (f) { |
1840 |
> |
if (tabAt(tab, i) == f) { |
1841 |
> |
if (fh >= 0) { |
1842 |
> |
binCount = 1; |
1843 |
> |
for (Node<K,V> e = f, pred = null;; ++binCount) { |
1844 |
> |
K ek; |
1845 |
> |
if (e.hash == h && |
1846 |
> |
((ek = e.key) == key || |
1847 |
> |
(ek != null && key.equals(ek)))) { |
1848 |
> |
val = remappingFunction.apply(key, e.val); |
1849 |
> |
if (val != null) |
1850 |
> |
e.val = val; |
1851 |
> |
else { |
1852 |
> |
delta = -1; |
1853 |
> |
Node<K,V> en = e.next; |
1854 |
> |
if (pred != null) |
1855 |
> |
pred.next = en; |
1856 |
> |
else |
1857 |
> |
setTabAt(tab, i, en); |
1858 |
> |
} |
1859 |
> |
break; |
1860 |
> |
} |
1861 |
> |
pred = e; |
1862 |
> |
if ((e = e.next) == null) { |
1863 |
> |
val = remappingFunction.apply(key, null); |
1864 |
> |
if (val != null) { |
1865 |
> |
delta = 1; |
1866 |
> |
pred.next = |
1867 |
> |
new Node<K,V>(h, key, val, null); |
1868 |
> |
} |
1869 |
> |
break; |
1870 |
> |
} |
1871 |
> |
} |
1872 |
> |
} |
1873 |
> |
else if (f instanceof TreeBin) { |
1874 |
> |
binCount = 1; |
1875 |
> |
TreeBin<K,V> t = (TreeBin<K,V>)f; |
1876 |
> |
TreeNode<K,V> r, p; |
1877 |
> |
if ((r = t.root) != null) |
1878 |
> |
p = r.findTreeNode(h, key, null); |
1879 |
> |
else |
1880 |
> |
p = null; |
1881 |
|
V pv = (p == null) ? null : p.val; |
1882 |
< |
if ((val = mf.apply(k, pv)) != null) { |
1882 |
> |
val = remappingFunction.apply(key, pv); |
1883 |
> |
if (val != null) { |
1884 |
|
if (p != null) |
1885 |
|
p.val = val; |
1886 |
|
else { |
1461 |
– |
len = 2; |
1887 |
|
delta = 1; |
1888 |
< |
t.putTreeNode(h, k, val); |
1888 |
> |
t.putTreeVal(h, key, val); |
1889 |
|
} |
1890 |
|
} |
1891 |
|
else if (p != null) { |
1892 |
|
delta = -1; |
1893 |
< |
t.deleteTreeNode(p); |
1894 |
< |
} |
1470 |
< |
} |
1471 |
< |
} finally { |
1472 |
< |
t.release(0); |
1473 |
< |
} |
1474 |
< |
if (len != 0) |
1475 |
< |
break; |
1476 |
< |
} |
1477 |
< |
else |
1478 |
< |
tab = (Node<V>[])fk; |
1479 |
< |
} |
1480 |
< |
else { |
1481 |
< |
synchronized (f) { |
1482 |
< |
if (tabAt(tab, i) == f) { |
1483 |
< |
len = 1; |
1484 |
< |
for (Node<V> e = f, pred = null;; ++len) { |
1485 |
< |
Object ek; V ev; |
1486 |
< |
if (e.hash == h && |
1487 |
< |
(ev = e.val) != null && |
1488 |
< |
((ek = e.key) == k || k.equals(ek))) { |
1489 |
< |
val = mf.apply(k, ev); |
1490 |
< |
if (val != null) |
1491 |
< |
e.val = val; |
1492 |
< |
else { |
1493 |
< |
delta = -1; |
1494 |
< |
Node<V> en = e.next; |
1495 |
< |
if (pred != null) |
1496 |
< |
pred.next = en; |
1497 |
< |
else |
1498 |
< |
setTabAt(tab, i, en); |
1499 |
< |
} |
1500 |
< |
break; |
1501 |
< |
} |
1502 |
< |
pred = e; |
1503 |
< |
if ((e = e.next) == null) { |
1504 |
< |
if (!onlyIfPresent && |
1505 |
< |
(val = mf.apply(k, null)) != null) { |
1506 |
< |
pred.next = new Node<V>(h, k, val, null); |
1507 |
< |
delta = 1; |
1508 |
< |
if (len >= TREE_THRESHOLD) |
1509 |
< |
replaceWithTreeBin(tab, i, k); |
1510 |
< |
} |
1511 |
< |
break; |
1893 |
> |
if (t.removeTreeNode(p)) |
1894 |
> |
setTabAt(tab, i, untreeify(t.first)); |
1895 |
|
} |
1896 |
|
} |
1897 |
|
} |
1898 |
|
} |
1899 |
< |
if (len != 0) |
1899 |
> |
if (binCount != 0) { |
1900 |
> |
if (binCount >= TREEIFY_THRESHOLD) |
1901 |
> |
treeifyBin(tab, i); |
1902 |
|
break; |
1903 |
+ |
} |
1904 |
|
} |
1905 |
|
} |
1906 |
|
if (delta != 0) |
1907 |
< |
addCount((long)delta, len); |
1907 |
> |
addCount((long)delta, binCount); |
1908 |
|
return val; |
1909 |
|
} |
1910 |
|
|
1911 |
< |
/** Implementation for merge */ |
1912 |
< |
@SuppressWarnings("unchecked") private final V internalMerge |
1913 |
< |
(K k, V v, BiFunction<? super V, ? super V, ? extends V> mf) { |
1914 |
< |
if (k == null || v == null || mf == null) |
1911 |
> |
/** |
1912 |
> |
* If the specified key is not already associated with a |
1913 |
> |
* (non-null) value, associates it with the given value. |
1914 |
> |
* Otherwise, replaces the value with the results of the given |
1915 |
> |
* remapping function, or removes if {@code null}. The entire |
1916 |
> |
* method invocation is performed atomically. Some attempted |
1917 |
> |
* update operations on this map by other threads may be blocked |
1918 |
> |
* while computation is in progress, so the computation should be |
1919 |
> |
* short and simple, and must not attempt to update any other |
1920 |
> |
* mappings of this Map. |
1921 |
> |
* |
1922 |
> |
* @param key key with which the specified value is to be associated |
1923 |
> |
* @param value the value to use if absent |
1924 |
> |
* @param remappingFunction the function to recompute a value if present |
1925 |
> |
* @return the new value associated with the specified key, or null if none |
1926 |
> |
* @throws NullPointerException if the specified key or the |
1927 |
> |
* remappingFunction is null |
1928 |
> |
* @throws RuntimeException or Error if the remappingFunction does so, |
1929 |
> |
* in which case the mapping is unchanged |
1930 |
> |
*/ |
1931 |
> |
public V merge(K key, V value, BiFunction<? super V, ? super V, ? extends V> remappingFunction) { |
1932 |
> |
if (key == null || value == null || remappingFunction == null) |
1933 |
|
throw new NullPointerException(); |
1934 |
< |
int h = spread(k.hashCode()); |
1934 |
> |
int h = spread(key.hashCode()); |
1935 |
|
V val = null; |
1936 |
|
int delta = 0; |
1937 |
< |
int len = 0; |
1938 |
< |
for (Node<V>[] tab = table;;) { |
1939 |
< |
int i; Node<V> f; Object fk; V fv; |
1940 |
< |
if (tab == null) |
1937 |
> |
int binCount = 0; |
1938 |
> |
for (Node<K,V>[] tab = table;;) { |
1939 |
> |
Node<K,V> f; int n, i, fh; |
1940 |
> |
if (tab == null || (n = tab.length) == 0) |
1941 |
|
tab = initTable(); |
1942 |
< |
else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) { |
1943 |
< |
if (casTabAt(tab, i, null, new Node<V>(h, k, v, null))) { |
1942 |
> |
else if ((f = tabAt(tab, i = (n - 1) & h)) == null) { |
1943 |
> |
if (casTabAt(tab, i, null, new Node<K,V>(h, key, value, null))) { |
1944 |
|
delta = 1; |
1945 |
< |
val = v; |
1945 |
> |
val = value; |
1946 |
|
break; |
1947 |
|
} |
1948 |
|
} |
1949 |
< |
else if (f.hash < 0) { |
1950 |
< |
if ((fk = f.key) instanceof TreeBin) { |
1951 |
< |
TreeBin<V> t = (TreeBin<V>)fk; |
1952 |
< |
t.acquire(0); |
1953 |
< |
try { |
1954 |
< |
if (tabAt(tab, i) == f) { |
1955 |
< |
len = 1; |
1956 |
< |
TreeNode<V> p = t.getTreeNode(h, k, t.root); |
1957 |
< |
val = (p == null) ? v : mf.apply(p.val, v); |
1949 |
> |
else if ((fh = f.hash) == MOVED) |
1950 |
> |
tab = helpTransfer(tab, f); |
1951 |
> |
else { |
1952 |
> |
synchronized (f) { |
1953 |
> |
if (tabAt(tab, i) == f) { |
1954 |
> |
if (fh >= 0) { |
1955 |
> |
binCount = 1; |
1956 |
> |
for (Node<K,V> e = f, pred = null;; ++binCount) { |
1957 |
> |
K ek; |
1958 |
> |
if (e.hash == h && |
1959 |
> |
((ek = e.key) == key || |
1960 |
> |
(ek != null && key.equals(ek)))) { |
1961 |
> |
val = remappingFunction.apply(e.val, value); |
1962 |
> |
if (val != null) |
1963 |
> |
e.val = val; |
1964 |
> |
else { |
1965 |
> |
delta = -1; |
1966 |
> |
Node<K,V> en = e.next; |
1967 |
> |
if (pred != null) |
1968 |
> |
pred.next = en; |
1969 |
> |
else |
1970 |
> |
setTabAt(tab, i, en); |
1971 |
> |
} |
1972 |
> |
break; |
1973 |
> |
} |
1974 |
> |
pred = e; |
1975 |
> |
if ((e = e.next) == null) { |
1976 |
> |
delta = 1; |
1977 |
> |
val = value; |
1978 |
> |
pred.next = |
1979 |
> |
new Node<K,V>(h, key, val, null); |
1980 |
> |
break; |
1981 |
> |
} |
1982 |
> |
} |
1983 |
> |
} |
1984 |
> |
else if (f instanceof TreeBin) { |
1985 |
> |
binCount = 2; |
1986 |
> |
TreeBin<K,V> t = (TreeBin<K,V>)f; |
1987 |
> |
TreeNode<K,V> r = t.root; |
1988 |
> |
TreeNode<K,V> p = (r == null) ? null : |
1989 |
> |
r.findTreeNode(h, key, null); |
1990 |
> |
val = (p == null) ? value : |
1991 |
> |
remappingFunction.apply(p.val, value); |
1992 |
|
if (val != null) { |
1993 |
|
if (p != null) |
1994 |
|
p.val = val; |
1995 |
|
else { |
1558 |
– |
len = 2; |
1996 |
|
delta = 1; |
1997 |
< |
t.putTreeNode(h, k, val); |
1997 |
> |
t.putTreeVal(h, key, val); |
1998 |
|
} |
1999 |
|
} |
2000 |
|
else if (p != null) { |
2001 |
|
delta = -1; |
2002 |
< |
t.deleteTreeNode(p); |
2003 |
< |
} |
1567 |
< |
} |
1568 |
< |
} finally { |
1569 |
< |
t.release(0); |
1570 |
< |
} |
1571 |
< |
if (len != 0) |
1572 |
< |
break; |
1573 |
< |
} |
1574 |
< |
else |
1575 |
< |
tab = (Node<V>[])fk; |
1576 |
< |
} |
1577 |
< |
else { |
1578 |
< |
synchronized (f) { |
1579 |
< |
if (tabAt(tab, i) == f) { |
1580 |
< |
len = 1; |
1581 |
< |
for (Node<V> e = f, pred = null;; ++len) { |
1582 |
< |
Object ek; V ev; |
1583 |
< |
if (e.hash == h && |
1584 |
< |
(ev = e.val) != null && |
1585 |
< |
((ek = e.key) == k || k.equals(ek))) { |
1586 |
< |
val = mf.apply(ev, v); |
1587 |
< |
if (val != null) |
1588 |
< |
e.val = val; |
1589 |
< |
else { |
1590 |
< |
delta = -1; |
1591 |
< |
Node<V> en = e.next; |
1592 |
< |
if (pred != null) |
1593 |
< |
pred.next = en; |
1594 |
< |
else |
1595 |
< |
setTabAt(tab, i, en); |
1596 |
< |
} |
1597 |
< |
break; |
1598 |
< |
} |
1599 |
< |
pred = e; |
1600 |
< |
if ((e = e.next) == null) { |
1601 |
< |
val = v; |
1602 |
< |
pred.next = new Node<V>(h, k, val, null); |
1603 |
< |
delta = 1; |
1604 |
< |
if (len >= TREE_THRESHOLD) |
1605 |
< |
replaceWithTreeBin(tab, i, k); |
1606 |
< |
break; |
2002 |
> |
if (t.removeTreeNode(p)) |
2003 |
> |
setTabAt(tab, i, untreeify(t.first)); |
2004 |
|
} |
2005 |
|
} |
2006 |
|
} |
2007 |
|
} |
2008 |
< |
if (len != 0) |
2008 |
> |
if (binCount != 0) { |
2009 |
> |
if (binCount >= TREEIFY_THRESHOLD) |
2010 |
> |
treeifyBin(tab, i); |
2011 |
|
break; |
2012 |
+ |
} |
2013 |
|
} |
2014 |
|
} |
2015 |
|
if (delta != 0) |
2016 |
< |
addCount((long)delta, len); |
2016 |
> |
addCount((long)delta, binCount); |
2017 |
|
return val; |
2018 |
|
} |
2019 |
|
|
2020 |
< |
/** Implementation for putAll */ |
2021 |
< |
@SuppressWarnings("unchecked") private final void internalPutAll |
2022 |
< |
(Map<? extends K, ? extends V> m) { |
2023 |
< |
tryPresize(m.size()); |
2024 |
< |
long delta = 0L; // number of uncommitted additions |
2025 |
< |
boolean npe = false; // to throw exception on exit for nulls |
2026 |
< |
try { // to clean up counts on other exceptions |
2027 |
< |
for (Map.Entry<?, ? extends V> entry : m.entrySet()) { |
2028 |
< |
Object k; V v; |
2029 |
< |
if (entry == null || (k = entry.getKey()) == null || |
2030 |
< |
(v = entry.getValue()) == null) { |
2031 |
< |
npe = true; |
2032 |
< |
break; |
2033 |
< |
} |
2034 |
< |
int h = spread(k.hashCode()); |
2035 |
< |
for (Node<V>[] tab = table;;) { |
2036 |
< |
int i; Node<V> f; int fh; Object fk; |
2037 |
< |
if (tab == null) |
2038 |
< |
tab = initTable(); |
2039 |
< |
else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null){ |
2040 |
< |
if (casTabAt(tab, i, null, new Node<V>(h, k, v, null))) { |
2041 |
< |
++delta; |
2042 |
< |
break; |
2043 |
< |
} |
2044 |
< |
} |
2045 |
< |
else if ((fh = f.hash) < 0) { |
2046 |
< |
if ((fk = f.key) instanceof TreeBin) { |
2047 |
< |
TreeBin<V> t = (TreeBin<V>)fk; |
2048 |
< |
boolean validated = false; |
2049 |
< |
t.acquire(0); |
2050 |
< |
try { |
2051 |
< |
if (tabAt(tab, i) == f) { |
2052 |
< |
validated = true; |
2053 |
< |
TreeNode<V> p = t.getTreeNode(h, k, t.root); |
2054 |
< |
if (p != null) |
2055 |
< |
p.val = v; |
2056 |
< |
else { |
2057 |
< |
t.putTreeNode(h, k, v); |
2058 |
< |
++delta; |
2059 |
< |
} |
2060 |
< |
} |
2061 |
< |
} finally { |
2062 |
< |
t.release(0); |
2063 |
< |
} |
2064 |
< |
if (validated) |
2065 |
< |
break; |
2020 |
> |
// Hashtable legacy methods |
2021 |
> |
|
2022 |
> |
/** |
2023 |
> |
* Legacy method testing if some key maps into the specified value |
2024 |
> |
* in this table. |
2025 |
> |
* |
2026 |
> |
* @deprecated This method is identical in functionality to |
2027 |
> |
* {@link #containsValue(Object)}, and exists solely to ensure |
2028 |
> |
* full compatibility with class {@link java.util.Hashtable}, |
2029 |
> |
* which supported this method prior to introduction of the |
2030 |
> |
* Java Collections framework. |
2031 |
> |
* |
2032 |
> |
* @param value a value to search for |
2033 |
> |
* @return {@code true} if and only if some key maps to the |
2034 |
> |
* {@code value} argument in this table as |
2035 |
> |
* determined by the {@code equals} method; |
2036 |
> |
* {@code false} otherwise |
2037 |
> |
* @throws NullPointerException if the specified value is null |
2038 |
> |
*/ |
2039 |
> |
@Deprecated |
2040 |
> |
public boolean contains(Object value) { |
2041 |
> |
return containsValue(value); |
2042 |
> |
} |
2043 |
> |
|
2044 |
> |
/** |
2045 |
> |
* Returns an enumeration of the keys in this table. |
2046 |
> |
* |
2047 |
> |
* @return an enumeration of the keys in this table |
2048 |
> |
* @see #keySet() |
2049 |
> |
*/ |
2050 |
> |
public Enumeration<K> keys() { |
2051 |
> |
Node<K,V>[] t; |
2052 |
> |
int f = (t = table) == null ? 0 : t.length; |
2053 |
> |
return new KeyIterator<K,V>(t, f, 0, f, this); |
2054 |
> |
} |
2055 |
> |
|
2056 |
> |
/** |
2057 |
> |
* Returns an enumeration of the values in this table. |
2058 |
> |
* |
2059 |
> |
* @return an enumeration of the values in this table |
2060 |
> |
* @see #values() |
2061 |
> |
*/ |
2062 |
> |
public Enumeration<V> elements() { |
2063 |
> |
Node<K,V>[] t; |
2064 |
> |
int f = (t = table) == null ? 0 : t.length; |
2065 |
> |
return new ValueIterator<K,V>(t, f, 0, f, this); |
2066 |
> |
} |
2067 |
> |
|
2068 |
> |
// ConcurrentHashMap-only methods |
2069 |
> |
|
2070 |
> |
/** |
2071 |
> |
* Returns the number of mappings. This method should be used |
2072 |
> |
* instead of {@link #size} because a ConcurrentHashMap may |
2073 |
> |
* contain more mappings than can be represented as an int. The |
2074 |
> |
* value returned is an estimate; the actual count may differ if |
2075 |
> |
* there are concurrent insertions or removals. |
2076 |
> |
* |
2077 |
> |
* @return the number of mappings |
2078 |
> |
* @since 1.8 |
2079 |
> |
*/ |
2080 |
> |
public long mappingCount() { |
2081 |
> |
long n = sumCount(); |
2082 |
> |
return (n < 0L) ? 0L : n; // ignore transient negative values |
2083 |
> |
} |
2084 |
> |
|
2085 |
> |
/** |
2086 |
> |
* Creates a new {@link Set} backed by a ConcurrentHashMap |
2087 |
> |
* from the given type to {@code Boolean.TRUE}. |
2088 |
> |
* |
2089 |
> |
* @param <K> the element type of the returned set |
2090 |
> |
* @return the new set |
2091 |
> |
* @since 1.8 |
2092 |
> |
*/ |
2093 |
> |
public static <K> KeySetView<K,Boolean> newKeySet() { |
2094 |
> |
return new KeySetView<K,Boolean> |
2095 |
> |
(new ConcurrentHashMap<K,Boolean>(), Boolean.TRUE); |
2096 |
> |
} |
2097 |
> |
|
2098 |
> |
/** |
2099 |
> |
* Creates a new {@link Set} backed by a ConcurrentHashMap |
2100 |
> |
* from the given type to {@code Boolean.TRUE}. |
2101 |
> |
* |
2102 |
> |
* @param initialCapacity The implementation performs internal |
2103 |
> |
* sizing to accommodate this many elements. |
2104 |
> |
* @param <K> the element type of the returned set |
2105 |
> |
* @return the new set |
2106 |
> |
* @throws IllegalArgumentException if the initial capacity of |
2107 |
> |
* elements is negative |
2108 |
> |
* @since 1.8 |
2109 |
> |
*/ |
2110 |
> |
public static <K> KeySetView<K,Boolean> newKeySet(int initialCapacity) { |
2111 |
> |
return new KeySetView<K,Boolean> |
2112 |
> |
(new ConcurrentHashMap<K,Boolean>(initialCapacity), Boolean.TRUE); |
2113 |
> |
} |
2114 |
> |
|
2115 |
> |
/** |
2116 |
> |
* Returns a {@link Set} view of the keys in this map, using the |
2117 |
> |
* given common mapped value for any additions (i.e., {@link |
2118 |
> |
* Collection#add} and {@link Collection#addAll(Collection)}). |
2119 |
> |
* This is of course only appropriate if it is acceptable to use |
2120 |
> |
* the same value for all additions from this view. |
2121 |
> |
* |
2122 |
> |
* @param mappedValue the mapped value to use for any additions |
2123 |
> |
* @return the set view |
2124 |
> |
* @throws NullPointerException if the mappedValue is null |
2125 |
> |
*/ |
2126 |
> |
public KeySetView<K,V> keySet(V mappedValue) { |
2127 |
> |
if (mappedValue == null) |
2128 |
> |
throw new NullPointerException(); |
2129 |
> |
return new KeySetView<K,V>(this, mappedValue); |
2130 |
> |
} |
2131 |
> |
|
2132 |
> |
/* ---------------- Special Nodes -------------- */ |
2133 |
> |
|
2134 |
> |
/** |
2135 |
> |
* A node inserted at head of bins during transfer operations. |
2136 |
> |
*/ |
2137 |
> |
static final class ForwardingNode<K,V> extends Node<K,V> { |
2138 |
> |
final Node<K,V>[] nextTable; |
2139 |
> |
ForwardingNode(Node<K,V>[] tab) { |
2140 |
> |
super(MOVED, null, null, null); |
2141 |
> |
this.nextTable = tab; |
2142 |
> |
} |
2143 |
> |
|
2144 |
> |
Node<K,V> find(int h, Object k) { |
2145 |
> |
// loop to avoid arbitrarily deep recursion on forwarding nodes |
2146 |
> |
outer: for (Node<K,V>[] tab = nextTable;;) { |
2147 |
> |
Node<K,V> e; int n; |
2148 |
> |
if (k == null || tab == null || (n = tab.length) == 0 || |
2149 |
> |
(e = tabAt(tab, (n - 1) & h)) == null) |
2150 |
> |
return null; |
2151 |
> |
for (;;) { |
2152 |
> |
int eh; K ek; |
2153 |
> |
if ((eh = e.hash) == h && |
2154 |
> |
((ek = e.key) == k || (ek != null && k.equals(ek)))) |
2155 |
> |
return e; |
2156 |
> |
if (eh < 0) { |
2157 |
> |
if (e instanceof ForwardingNode) { |
2158 |
> |
tab = ((ForwardingNode<K,V>)e).nextTable; |
2159 |
> |
continue outer; |
2160 |
|
} |
2161 |
|
else |
2162 |
< |
tab = (Node<V>[])fk; |
1669 |
< |
} |
1670 |
< |
else { |
1671 |
< |
int len = 0; |
1672 |
< |
synchronized (f) { |
1673 |
< |
if (tabAt(tab, i) == f) { |
1674 |
< |
len = 1; |
1675 |
< |
for (Node<V> e = f;; ++len) { |
1676 |
< |
Object ek; V ev; |
1677 |
< |
if (e.hash == h && |
1678 |
< |
(ev = e.val) != null && |
1679 |
< |
((ek = e.key) == k || k.equals(ek))) { |
1680 |
< |
e.val = v; |
1681 |
< |
break; |
1682 |
< |
} |
1683 |
< |
Node<V> last = e; |
1684 |
< |
if ((e = e.next) == null) { |
1685 |
< |
++delta; |
1686 |
< |
last.next = new Node<V>(h, k, v, null); |
1687 |
< |
if (len >= TREE_THRESHOLD) |
1688 |
< |
replaceWithTreeBin(tab, i, k); |
1689 |
< |
break; |
1690 |
< |
} |
1691 |
< |
} |
1692 |
< |
} |
1693 |
< |
} |
1694 |
< |
if (len != 0) { |
1695 |
< |
if (len > 1) { |
1696 |
< |
addCount(delta, len); |
1697 |
< |
delta = 0L; |
1698 |
< |
} |
1699 |
< |
break; |
1700 |
< |
} |
2162 |
> |
return e.find(h, k); |
2163 |
|
} |
2164 |
+ |
if ((e = e.next) == null) |
2165 |
+ |
return null; |
2166 |
|
} |
2167 |
|
} |
1704 |
– |
} finally { |
1705 |
– |
if (delta != 0L) |
1706 |
– |
addCount(delta, 2); |
2168 |
|
} |
1708 |
– |
if (npe) |
1709 |
– |
throw new NullPointerException(); |
2169 |
|
} |
2170 |
|
|
2171 |
|
/** |
2172 |
< |
* Implementation for clear. Steps through each bin, removing all |
1714 |
< |
* nodes. |
2172 |
> |
* A place-holder node used in computeIfAbsent and compute |
2173 |
|
*/ |
2174 |
< |
@SuppressWarnings("unchecked") private final void internalClear() { |
2175 |
< |
long delta = 0L; // negative number of deletions |
2176 |
< |
int i = 0; |
2177 |
< |
Node<V>[] tab = table; |
2178 |
< |
while (tab != null && i < tab.length) { |
2179 |
< |
Node<V> f = tabAt(tab, i); |
2180 |
< |
if (f == null) |
1723 |
< |
++i; |
1724 |
< |
else if (f.hash < 0) { |
1725 |
< |
Object fk; |
1726 |
< |
if ((fk = f.key) instanceof TreeBin) { |
1727 |
< |
TreeBin<V> t = (TreeBin<V>)fk; |
1728 |
< |
t.acquire(0); |
1729 |
< |
try { |
1730 |
< |
if (tabAt(tab, i) == f) { |
1731 |
< |
for (Node<V> p = t.first; p != null; p = p.next) { |
1732 |
< |
if (p.val != null) { // (currently always true) |
1733 |
< |
p.val = null; |
1734 |
< |
--delta; |
1735 |
< |
} |
1736 |
< |
} |
1737 |
< |
t.first = null; |
1738 |
< |
t.root = null; |
1739 |
< |
++i; |
1740 |
< |
} |
1741 |
< |
} finally { |
1742 |
< |
t.release(0); |
1743 |
< |
} |
1744 |
< |
} |
1745 |
< |
else |
1746 |
< |
tab = (Node<V>[])fk; |
1747 |
< |
} |
1748 |
< |
else { |
1749 |
< |
synchronized (f) { |
1750 |
< |
if (tabAt(tab, i) == f) { |
1751 |
< |
for (Node<V> e = f; e != null; e = e.next) { |
1752 |
< |
if (e.val != null) { // (currently always true) |
1753 |
< |
e.val = null; |
1754 |
< |
--delta; |
1755 |
< |
} |
1756 |
< |
} |
1757 |
< |
setTabAt(tab, i, null); |
1758 |
< |
++i; |
1759 |
< |
} |
1760 |
< |
} |
1761 |
< |
} |
2174 |
> |
static final class ReservationNode<K,V> extends Node<K,V> { |
2175 |
> |
ReservationNode() { |
2176 |
> |
super(RESERVED, null, null, null); |
2177 |
> |
} |
2178 |
> |
|
2179 |
> |
Node<K,V> find(int h, Object k) { |
2180 |
> |
return null; |
2181 |
|
} |
1763 |
– |
if (delta != 0L) |
1764 |
– |
addCount(delta, -1); |
2182 |
|
} |
2183 |
|
|
2184 |
|
/* ---------------- Table Initialization and Resizing -------------- */ |
2185 |
|
|
2186 |
|
/** |
2187 |
< |
* Returns a power of two table size for the given desired capacity. |
2188 |
< |
* See Hackers Delight, sec 3.2 |
2187 |
> |
* Returns the stamp bits for resizing a table of size n. |
2188 |
> |
* Must be negative when shifted left by RESIZE_STAMP_SHIFT. |
2189 |
|
*/ |
2190 |
< |
private static final int tableSizeFor(int c) { |
2191 |
< |
int n = c - 1; |
1775 |
< |
n |= n >>> 1; |
1776 |
< |
n |= n >>> 2; |
1777 |
< |
n |= n >>> 4; |
1778 |
< |
n |= n >>> 8; |
1779 |
< |
n |= n >>> 16; |
1780 |
< |
return (n < 0) ? 1 : (n >= MAXIMUM_CAPACITY) ? MAXIMUM_CAPACITY : n + 1; |
2190 |
> |
static final int resizeStamp(int n) { |
2191 |
> |
return Integer.numberOfLeadingZeros(n) | (1 << (RESIZE_STAMP_BITS - 1)); |
2192 |
|
} |
2193 |
|
|
2194 |
|
/** |
2195 |
|
* Initializes table, using the size recorded in sizeCtl. |
2196 |
|
*/ |
2197 |
< |
@SuppressWarnings("unchecked") private final Node<V>[] initTable() { |
2198 |
< |
Node<V>[] tab; int sc; |
2199 |
< |
while ((tab = table) == null) { |
2197 |
> |
private final Node<K,V>[] initTable() { |
2198 |
> |
Node<K,V>[] tab; int sc; |
2199 |
> |
while ((tab = table) == null || tab.length == 0) { |
2200 |
|
if ((sc = sizeCtl) < 0) |
2201 |
|
Thread.yield(); // lost initialization race; just spin |
2202 |
|
else if (U.compareAndSwapInt(this, SIZECTL, sc, -1)) { |
2203 |
|
try { |
2204 |
< |
if ((tab = table) == null) { |
2204 |
> |
if ((tab = table) == null || tab.length == 0) { |
2205 |
|
int n = (sc > 0) ? sc : DEFAULT_CAPACITY; |
2206 |
< |
@SuppressWarnings("rawtypes") Node[] tb = new Node[n]; |
2207 |
< |
table = tab = (Node<V>[])tb; |
2206 |
> |
@SuppressWarnings("unchecked") |
2207 |
> |
Node<K,V>[] nt = (Node<K,V>[])new Node<?,?>[n]; |
2208 |
> |
table = tab = nt; |
2209 |
|
sc = n - (n >>> 2); |
2210 |
|
} |
2211 |
|
} finally { |
2228 |
|
* @param check if <0, don't check resize, if <= 1 only check if uncontended |
2229 |
|
*/ |
2230 |
|
private final void addCount(long x, int check) { |
2231 |
< |
Cell[] as; long b, s; |
2231 |
> |
CounterCell[] as; long b, s; |
2232 |
|
if ((as = counterCells) != null || |
2233 |
|
!U.compareAndSwapLong(this, BASECOUNT, b = baseCount, s = b + x)) { |
2234 |
< |
Cell a; long v; int m; |
2234 |
> |
CounterCell a; long v; int m; |
2235 |
|
boolean uncontended = true; |
2236 |
|
if (as == null || (m = as.length - 1) < 0 || |
2237 |
|
(a = as[ThreadLocalRandom.getProbe() & m]) == null || |
2245 |
|
s = sumCount(); |
2246 |
|
} |
2247 |
|
if (check >= 0) { |
2248 |
< |
Node<V>[] tab, nt; int sc; |
2248 |
> |
Node<K,V>[] tab, nt; int n, sc; |
2249 |
|
while (s >= (long)(sc = sizeCtl) && (tab = table) != null && |
2250 |
< |
tab.length < MAXIMUM_CAPACITY) { |
2250 |
> |
(n = tab.length) < MAXIMUM_CAPACITY) { |
2251 |
> |
int rs = resizeStamp(n); |
2252 |
|
if (sc < 0) { |
2253 |
< |
if (sc == -1 || transferIndex <= transferOrigin || |
2254 |
< |
(nt = nextTable) == null) |
2253 |
> |
if ((sc >>> RESIZE_STAMP_SHIFT) != rs || sc == rs + 1 || |
2254 |
> |
sc == rs + MAX_RESIZERS || (nt = nextTable) == null || |
2255 |
> |
transferIndex <= 0) |
2256 |
|
break; |
2257 |
< |
if (U.compareAndSwapInt(this, SIZECTL, sc, sc - 1)) |
2257 |
> |
if (U.compareAndSwapInt(this, SIZECTL, sc, sc + 1)) |
2258 |
|
transfer(tab, nt); |
2259 |
|
} |
2260 |
< |
else if (U.compareAndSwapInt(this, SIZECTL, sc, -2)) |
2260 |
> |
else if (U.compareAndSwapInt(this, SIZECTL, sc, |
2261 |
> |
(rs << RESIZE_STAMP_SHIFT) + 2)) |
2262 |
|
transfer(tab, null); |
2263 |
|
s = sumCount(); |
2264 |
|
} |
2266 |
|
} |
2267 |
|
|
2268 |
|
/** |
2269 |
+ |
* Helps transfer if a resize is in progress. |
2270 |
+ |
*/ |
2271 |
+ |
final Node<K,V>[] helpTransfer(Node<K,V>[] tab, Node<K,V> f) { |
2272 |
+ |
Node<K,V>[] nextTab; int sc; |
2273 |
+ |
if (tab != null && (f instanceof ForwardingNode) && |
2274 |
+ |
(nextTab = ((ForwardingNode<K,V>)f).nextTable) != null) { |
2275 |
+ |
int rs = resizeStamp(tab.length); |
2276 |
+ |
while (nextTab == nextTable && table == tab && |
2277 |
+ |
(sc = sizeCtl) < 0) { |
2278 |
+ |
if ((sc >>> RESIZE_STAMP_SHIFT) != rs || sc == rs + 1 || |
2279 |
+ |
sc == rs + MAX_RESIZERS || transferIndex <= 0) |
2280 |
+ |
break; |
2281 |
+ |
if (U.compareAndSwapInt(this, SIZECTL, sc, sc + 1)) { |
2282 |
+ |
transfer(tab, nextTab); |
2283 |
+ |
break; |
2284 |
+ |
} |
2285 |
+ |
} |
2286 |
+ |
return nextTab; |
2287 |
+ |
} |
2288 |
+ |
return table; |
2289 |
+ |
} |
2290 |
+ |
|
2291 |
+ |
/** |
2292 |
|
* Tries to presize table to accommodate the given number of elements. |
2293 |
|
* |
2294 |
|
* @param size number of elements (doesn't need to be perfectly accurate) |
2295 |
|
*/ |
2296 |
< |
@SuppressWarnings("unchecked") private final void tryPresize(int size) { |
2296 |
> |
private final void tryPresize(int size) { |
2297 |
|
int c = (size >= (MAXIMUM_CAPACITY >>> 1)) ? MAXIMUM_CAPACITY : |
2298 |
|
tableSizeFor(size + (size >>> 1) + 1); |
2299 |
|
int sc; |
2300 |
|
while ((sc = sizeCtl) >= 0) { |
2301 |
< |
Node<V>[] tab = table; int n; |
2301 |
> |
Node<K,V>[] tab = table; int n; |
2302 |
|
if (tab == null || (n = tab.length) == 0) { |
2303 |
|
n = (sc > c) ? sc : c; |
2304 |
|
if (U.compareAndSwapInt(this, SIZECTL, sc, -1)) { |
2305 |
|
try { |
2306 |
|
if (table == tab) { |
2307 |
< |
@SuppressWarnings("rawtypes") Node[] tb = new Node[n]; |
2308 |
< |
table = (Node<V>[])tb; |
2307 |
> |
@SuppressWarnings("unchecked") |
2308 |
> |
Node<K,V>[] nt = (Node<K,V>[])new Node<?,?>[n]; |
2309 |
> |
table = nt; |
2310 |
|
sc = n - (n >>> 2); |
2311 |
|
} |
2312 |
|
} finally { |
2316 |
|
} |
2317 |
|
else if (c <= sc || n >= MAXIMUM_CAPACITY) |
2318 |
|
break; |
2319 |
< |
else if (tab == table && |
2320 |
< |
U.compareAndSwapInt(this, SIZECTL, sc, -2)) |
2321 |
< |
transfer(tab, null); |
2319 |
> |
else if (tab == table) { |
2320 |
> |
int rs = resizeStamp(n); |
2321 |
> |
if (sc < 0) { |
2322 |
> |
Node<K,V>[] nt; |
2323 |
> |
if ((sc >>> RESIZE_STAMP_SHIFT) != rs || sc == rs + 1 || |
2324 |
> |
sc == rs + MAX_RESIZERS || (nt = nextTable) == null || |
2325 |
> |
transferIndex <= 0) |
2326 |
> |
break; |
2327 |
> |
if (U.compareAndSwapInt(this, SIZECTL, sc, sc + 1)) |
2328 |
> |
transfer(tab, nt); |
2329 |
> |
} |
2330 |
> |
else if (U.compareAndSwapInt(this, SIZECTL, sc, |
2331 |
> |
(rs << RESIZE_STAMP_SHIFT) + 2)) |
2332 |
> |
transfer(tab, null); |
2333 |
> |
} |
2334 |
|
} |
2335 |
|
} |
2336 |
|
|
2338 |
|
* Moves and/or copies the nodes in each bin to new table. See |
2339 |
|
* above for explanation. |
2340 |
|
*/ |
2341 |
< |
@SuppressWarnings("unchecked") private final void transfer |
1891 |
< |
(Node<V>[] tab, Node<V>[] nextTab) { |
2341 |
> |
private final void transfer(Node<K,V>[] tab, Node<K,V>[] nextTab) { |
2342 |
|
int n = tab.length, stride; |
2343 |
|
if ((stride = (NCPU > 1) ? (n >>> 3) / NCPU : n) < MIN_TRANSFER_STRIDE) |
2344 |
|
stride = MIN_TRANSFER_STRIDE; // subdivide range |
2345 |
|
if (nextTab == null) { // initiating |
2346 |
|
try { |
2347 |
< |
@SuppressWarnings("rawtypes") Node[] tb = new Node[n << 1]; |
2348 |
< |
nextTab = (Node<V>[])tb; |
2347 |
> |
@SuppressWarnings("unchecked") |
2348 |
> |
Node<K,V>[] nt = (Node<K,V>[])new Node<?,?>[n << 1]; |
2349 |
> |
nextTab = nt; |
2350 |
|
} catch (Throwable ex) { // try to cope with OOME |
2351 |
|
sizeCtl = Integer.MAX_VALUE; |
2352 |
|
return; |
2353 |
|
} |
2354 |
|
nextTable = nextTab; |
1904 |
– |
transferOrigin = n; |
2355 |
|
transferIndex = n; |
1906 |
– |
Node<V> rev = new Node<V>(MOVED, tab, null, null); |
1907 |
– |
for (int k = n; k > 0;) { // progressively reveal ready slots |
1908 |
– |
int nextk = (k > stride) ? k - stride : 0; |
1909 |
– |
for (int m = nextk; m < k; ++m) |
1910 |
– |
nextTab[m] = rev; |
1911 |
– |
for (int m = n + nextk; m < n + k; ++m) |
1912 |
– |
nextTab[m] = rev; |
1913 |
– |
U.putOrderedInt(this, TRANSFERORIGIN, k = nextk); |
1914 |
– |
} |
2356 |
|
} |
2357 |
|
int nextn = nextTab.length; |
2358 |
< |
Node<V> fwd = new Node<V>(MOVED, nextTab, null, null); |
2358 |
> |
ForwardingNode<K,V> fwd = new ForwardingNode<K,V>(nextTab); |
2359 |
|
boolean advance = true; |
2360 |
+ |
boolean finishing = false; // to ensure sweep before committing nextTab |
2361 |
|
for (int i = 0, bound = 0;;) { |
2362 |
< |
int nextIndex, nextBound; Node<V> f; Object fk; |
2362 |
> |
Node<K,V> f; int fh; |
2363 |
|
while (advance) { |
2364 |
< |
if (--i >= bound) |
2364 |
> |
int nextIndex, nextBound; |
2365 |
> |
if (--i >= bound || finishing) |
2366 |
|
advance = false; |
2367 |
< |
else if ((nextIndex = transferIndex) <= transferOrigin) { |
2367 |
> |
else if ((nextIndex = transferIndex) <= 0) { |
2368 |
|
i = -1; |
2369 |
|
advance = false; |
2370 |
|
} |
2378 |
|
} |
2379 |
|
} |
2380 |
|
if (i < 0 || i >= n || i + n >= nextn) { |
2381 |
< |
for (int sc;;) { |
2382 |
< |
if (U.compareAndSwapInt(this, SIZECTL, sc = sizeCtl, ++sc)) { |
2383 |
< |
if (sc == -1) { |
2384 |
< |
nextTable = null; |
2385 |
< |
table = nextTab; |
2386 |
< |
sizeCtl = (n << 1) - (n >>> 1); |
1944 |
< |
} |
1945 |
< |
return; |
1946 |
< |
} |
2381 |
> |
int sc; |
2382 |
> |
if (finishing) { |
2383 |
> |
nextTable = null; |
2384 |
> |
table = nextTab; |
2385 |
> |
sizeCtl = (n << 1) - (n >>> 1); |
2386 |
> |
return; |
2387 |
|
} |
2388 |
< |
} |
2389 |
< |
else if ((f = tabAt(tab, i)) == null) { |
2390 |
< |
if (casTabAt(tab, i, null, fwd)) { |
2391 |
< |
setTabAt(nextTab, i, null); |
2392 |
< |
setTabAt(nextTab, i + n, null); |
1953 |
< |
advance = true; |
2388 |
> |
if (U.compareAndSwapInt(this, SIZECTL, sc = sizeCtl, sc - 1)) { |
2389 |
> |
if ((sc - 2) != resizeStamp(n)) |
2390 |
> |
return; |
2391 |
> |
finishing = advance = true; |
2392 |
> |
i = n; // recheck before commit |
2393 |
|
} |
2394 |
|
} |
2395 |
< |
else if (f.hash >= 0) { |
2395 |
> |
else if ((f = tabAt(tab, i)) == null) |
2396 |
> |
advance = casTabAt(tab, i, null, fwd); |
2397 |
> |
else if ((fh = f.hash) == MOVED) |
2398 |
> |
advance = true; // already processed |
2399 |
> |
else { |
2400 |
|
synchronized (f) { |
2401 |
|
if (tabAt(tab, i) == f) { |
2402 |
< |
int runBit = f.hash & n; |
2403 |
< |
Node<V> lastRun = f, lo = null, hi = null; |
2404 |
< |
for (Node<V> p = f.next; p != null; p = p.next) { |
2405 |
< |
int b = p.hash & n; |
2406 |
< |
if (b != runBit) { |
2407 |
< |
runBit = b; |
2408 |
< |
lastRun = p; |
2402 |
> |
Node<K,V> ln, hn; |
2403 |
> |
if (fh >= 0) { |
2404 |
> |
int runBit = fh & n; |
2405 |
> |
Node<K,V> lastRun = f; |
2406 |
> |
for (Node<K,V> p = f.next; p != null; p = p.next) { |
2407 |
> |
int b = p.hash & n; |
2408 |
> |
if (b != runBit) { |
2409 |
> |
runBit = b; |
2410 |
> |
lastRun = p; |
2411 |
> |
} |
2412 |
|
} |
2413 |
< |
} |
2414 |
< |
if (runBit == 0) |
2415 |
< |
lo = lastRun; |
1970 |
< |
else |
1971 |
< |
hi = lastRun; |
1972 |
< |
for (Node<V> p = f; p != lastRun; p = p.next) { |
1973 |
< |
int ph = p.hash; |
1974 |
< |
Object pk = p.key; V pv = p.val; |
1975 |
< |
if ((ph & n) == 0) |
1976 |
< |
lo = new Node<V>(ph, pk, pv, lo); |
1977 |
< |
else |
1978 |
< |
hi = new Node<V>(ph, pk, pv, hi); |
1979 |
< |
} |
1980 |
< |
setTabAt(nextTab, i, lo); |
1981 |
< |
setTabAt(nextTab, i + n, hi); |
1982 |
< |
setTabAt(tab, i, fwd); |
1983 |
< |
advance = true; |
1984 |
< |
} |
1985 |
< |
} |
1986 |
< |
} |
1987 |
< |
else if ((fk = f.key) instanceof TreeBin) { |
1988 |
< |
TreeBin<V> t = (TreeBin<V>)fk; |
1989 |
< |
t.acquire(0); |
1990 |
< |
try { |
1991 |
< |
if (tabAt(tab, i) == f) { |
1992 |
< |
TreeBin<V> lt = new TreeBin<V>(); |
1993 |
< |
TreeBin<V> ht = new TreeBin<V>(); |
1994 |
< |
int lc = 0, hc = 0; |
1995 |
< |
for (Node<V> e = t.first; e != null; e = e.next) { |
1996 |
< |
int h = e.hash; |
1997 |
< |
Object k = e.key; V v = e.val; |
1998 |
< |
if ((h & n) == 0) { |
1999 |
< |
++lc; |
2000 |
< |
lt.putTreeNode(h, k, v); |
2413 |
> |
if (runBit == 0) { |
2414 |
> |
ln = lastRun; |
2415 |
> |
hn = null; |
2416 |
|
} |
2417 |
|
else { |
2418 |
< |
++hc; |
2419 |
< |
ht.putTreeNode(h, k, v); |
2418 |
> |
hn = lastRun; |
2419 |
> |
ln = null; |
2420 |
|
} |
2421 |
+ |
for (Node<K,V> p = f; p != lastRun; p = p.next) { |
2422 |
+ |
int ph = p.hash; K pk = p.key; V pv = p.val; |
2423 |
+ |
if ((ph & n) == 0) |
2424 |
+ |
ln = new Node<K,V>(ph, pk, pv, ln); |
2425 |
+ |
else |
2426 |
+ |
hn = new Node<K,V>(ph, pk, pv, hn); |
2427 |
+ |
} |
2428 |
+ |
setTabAt(nextTab, i, ln); |
2429 |
+ |
setTabAt(nextTab, i + n, hn); |
2430 |
+ |
setTabAt(tab, i, fwd); |
2431 |
+ |
advance = true; |
2432 |
|
} |
2433 |
< |
Node<V> ln, hn; // throw away trees if too small |
2434 |
< |
if (lc < TREE_THRESHOLD) { |
2435 |
< |
ln = null; |
2436 |
< |
for (Node<V> p = lt.first; p != null; p = p.next) |
2437 |
< |
ln = new Node<V>(p.hash, p.key, p.val, ln); |
2438 |
< |
} |
2439 |
< |
else |
2440 |
< |
ln = new Node<V>(MOVED, lt, null, null); |
2441 |
< |
setTabAt(nextTab, i, ln); |
2442 |
< |
if (hc < TREE_THRESHOLD) { |
2443 |
< |
hn = null; |
2444 |
< |
for (Node<V> p = ht.first; p != null; p = p.next) |
2445 |
< |
hn = new Node<V>(p.hash, p.key, p.val, hn); |
2433 |
> |
else if (f instanceof TreeBin) { |
2434 |
> |
TreeBin<K,V> t = (TreeBin<K,V>)f; |
2435 |
> |
TreeNode<K,V> lo = null, loTail = null; |
2436 |
> |
TreeNode<K,V> hi = null, hiTail = null; |
2437 |
> |
int lc = 0, hc = 0; |
2438 |
> |
for (Node<K,V> e = t.first; e != null; e = e.next) { |
2439 |
> |
int h = e.hash; |
2440 |
> |
TreeNode<K,V> p = new TreeNode<K,V> |
2441 |
> |
(h, e.key, e.val, null, null); |
2442 |
> |
if ((h & n) == 0) { |
2443 |
> |
if ((p.prev = loTail) == null) |
2444 |
> |
lo = p; |
2445 |
> |
else |
2446 |
> |
loTail.next = p; |
2447 |
> |
loTail = p; |
2448 |
> |
++lc; |
2449 |
> |
} |
2450 |
> |
else { |
2451 |
> |
if ((p.prev = hiTail) == null) |
2452 |
> |
hi = p; |
2453 |
> |
else |
2454 |
> |
hiTail.next = p; |
2455 |
> |
hiTail = p; |
2456 |
> |
++hc; |
2457 |
> |
} |
2458 |
> |
} |
2459 |
> |
ln = (lc <= UNTREEIFY_THRESHOLD) ? untreeify(lo) : |
2460 |
> |
(hc != 0) ? new TreeBin<K,V>(lo) : t; |
2461 |
> |
hn = (hc <= UNTREEIFY_THRESHOLD) ? untreeify(hi) : |
2462 |
> |
(lc != 0) ? new TreeBin<K,V>(hi) : t; |
2463 |
> |
setTabAt(nextTab, i, ln); |
2464 |
> |
setTabAt(nextTab, i + n, hn); |
2465 |
> |
setTabAt(tab, i, fwd); |
2466 |
> |
advance = true; |
2467 |
|
} |
2021 |
– |
else |
2022 |
– |
hn = new Node<V>(MOVED, ht, null, null); |
2023 |
– |
setTabAt(nextTab, i + n, hn); |
2024 |
– |
setTabAt(tab, i, fwd); |
2025 |
– |
advance = true; |
2468 |
|
} |
2027 |
– |
} finally { |
2028 |
– |
t.release(0); |
2469 |
|
} |
2470 |
|
} |
2031 |
– |
else |
2032 |
– |
advance = true; // already processed |
2471 |
|
} |
2472 |
|
} |
2473 |
|
|
2474 |
|
/* ---------------- Counter support -------------- */ |
2475 |
|
|
2476 |
+ |
/** |
2477 |
+ |
* A padded cell for distributing counts. Adapted from LongAdder |
2478 |
+ |
* and Striped64. See their internal docs for explanation. |
2479 |
+ |
*/ |
2480 |
+ |
@sun.misc.Contended static final class CounterCell { |
2481 |
+ |
volatile long value; |
2482 |
+ |
CounterCell(long x) { value = x; } |
2483 |
+ |
} |
2484 |
+ |
|
2485 |
|
final long sumCount() { |
2486 |
< |
Cell[] as = counterCells; Cell a; |
2486 |
> |
CounterCell[] as = counterCells; CounterCell a; |
2487 |
|
long sum = baseCount; |
2488 |
|
if (as != null) { |
2489 |
|
for (int i = 0; i < as.length; ++i) { |
2504 |
|
} |
2505 |
|
boolean collide = false; // True if last slot nonempty |
2506 |
|
for (;;) { |
2507 |
< |
Cell[] as; Cell a; int n; long v; |
2507 |
> |
CounterCell[] as; CounterCell a; int n; long v; |
2508 |
|
if ((as = counterCells) != null && (n = as.length) > 0) { |
2509 |
|
if ((a = as[(n - 1) & h]) == null) { |
2510 |
|
if (cellsBusy == 0) { // Try to attach new Cell |
2511 |
< |
Cell r = new Cell(x); // Optimistic create |
2511 |
> |
CounterCell r = new CounterCell(x); // Optimistic create |
2512 |
|
if (cellsBusy == 0 && |
2513 |
|
U.compareAndSwapInt(this, CELLSBUSY, 0, 1)) { |
2514 |
|
boolean created = false; |
2515 |
|
try { // Recheck under lock |
2516 |
< |
Cell[] rs; int m, j; |
2516 |
> |
CounterCell[] rs; int m, j; |
2517 |
|
if ((rs = counterCells) != null && |
2518 |
|
(m = rs.length) > 0 && |
2519 |
|
rs[j = (m - 1) & h] == null) { |
2542 |
|
U.compareAndSwapInt(this, CELLSBUSY, 0, 1)) { |
2543 |
|
try { |
2544 |
|
if (counterCells == as) {// Expand table unless stale |
2545 |
< |
Cell[] rs = new Cell[n << 1]; |
2545 |
> |
CounterCell[] rs = new CounterCell[n << 1]; |
2546 |
|
for (int i = 0; i < n; ++i) |
2547 |
|
rs[i] = as[i]; |
2548 |
|
counterCells = rs; |
2560 |
|
boolean init = false; |
2561 |
|
try { // Initialize table |
2562 |
|
if (counterCells == as) { |
2563 |
< |
Cell[] rs = new Cell[2]; |
2564 |
< |
rs[h & 1] = new Cell(x); |
2563 |
> |
CounterCell[] rs = new CounterCell[2]; |
2564 |
> |
rs[h & 1] = new CounterCell(x); |
2565 |
|
counterCells = rs; |
2566 |
|
init = true; |
2567 |
|
} |
2576 |
|
} |
2577 |
|
} |
2578 |
|
|
2579 |
< |
/* ----------------Table Traversal -------------- */ |
2579 |
> |
/* ---------------- Conversion from/to TreeBins -------------- */ |
2580 |
|
|
2581 |
|
/** |
2582 |
< |
* Encapsulates traversal for methods such as containsValue; also |
2583 |
< |
* serves as a base class for other iterators and bulk tasks. |
2137 |
< |
* |
2138 |
< |
* At each step, the iterator snapshots the key ("nextKey") and |
2139 |
< |
* value ("nextVal") of a valid node (i.e., one that, at point of |
2140 |
< |
* snapshot, has a non-null user value). Because val fields can |
2141 |
< |
* change (including to null, indicating deletion), field nextVal |
2142 |
< |
* might not be accurate at point of use, but still maintains the |
2143 |
< |
* weak consistency property of holding a value that was once |
2144 |
< |
* valid. To support iterator.remove, the nextKey field is not |
2145 |
< |
* updated (nulled out) when the iterator cannot advance. |
2146 |
< |
* |
2147 |
< |
* Internal traversals directly access these fields, as in: |
2148 |
< |
* {@code while (it.advance() != null) { process(it.nextKey); }} |
2149 |
< |
* |
2150 |
< |
* Exported iterators must track whether the iterator has advanced |
2151 |
< |
* (in hasNext vs next) (by setting/checking/nulling field |
2152 |
< |
* nextVal), and then extract key, value, or key-value pairs as |
2153 |
< |
* return values of next(). |
2154 |
< |
* |
2155 |
< |
* The iterator visits once each still-valid node that was |
2156 |
< |
* reachable upon iterator construction. It might miss some that |
2157 |
< |
* were added to a bin after the bin was visited, which is OK wrt |
2158 |
< |
* consistency guarantees. Maintaining this property in the face |
2159 |
< |
* of possible ongoing resizes requires a fair amount of |
2160 |
< |
* bookkeeping state that is difficult to optimize away amidst |
2161 |
< |
* volatile accesses. Even so, traversal maintains reasonable |
2162 |
< |
* throughput. |
2163 |
< |
* |
2164 |
< |
* Normally, iteration proceeds bin-by-bin traversing lists. |
2165 |
< |
* However, if the table has been resized, then all future steps |
2166 |
< |
* must traverse both the bin at the current index as well as at |
2167 |
< |
* (index + baseSize); and so on for further resizings. To |
2168 |
< |
* paranoically cope with potential sharing by users of iterators |
2169 |
< |
* across threads, iteration terminates if a bounds checks fails |
2170 |
< |
* for a table read. |
2171 |
< |
* |
2172 |
< |
* This class supports both Spliterator-based traversal and |
2173 |
< |
* CountedCompleter-based bulk tasks. The same "batch" field is |
2174 |
< |
* used, but in slightly different ways, in the two cases. For |
2175 |
< |
* Spliterators, it is a saturating (at Integer.MAX_VALUE) |
2176 |
< |
* estimate of element coverage. For CHM tasks, it is a pre-scaled |
2177 |
< |
* size that halves down to zero for leaf tasks, that is only |
2178 |
< |
* computed upon execution of the task. (Tasks can be submitted to |
2179 |
< |
* any pool, of any size, so we don't know scale factors until |
2180 |
< |
* running.) |
2181 |
< |
* |
2182 |
< |
* This class extends CountedCompleter to streamline parallel |
2183 |
< |
* iteration in bulk operations. This adds only a few fields of |
2184 |
< |
* space overhead, which is small enough in cases where it is not |
2185 |
< |
* needed to not worry about it. Because CountedCompleter is |
2186 |
< |
* Serializable, but iterators need not be, we need to add warning |
2187 |
< |
* suppressions. |
2582 |
> |
* Replaces all linked nodes in bin at given index unless table is |
2583 |
> |
* too small, in which case resizes instead. |
2584 |
|
*/ |
2585 |
< |
@SuppressWarnings("serial") static class Traverser<K,V,R> |
2586 |
< |
extends CountedCompleter<R> { |
2587 |
< |
final ConcurrentHashMap<K,V> map; |
2588 |
< |
Node<V> next; // the next entry to use |
2589 |
< |
K nextKey; // cached key field of next |
2590 |
< |
V nextVal; // cached val field of next |
2591 |
< |
Node<V>[] tab; // current table; updated if resized |
2592 |
< |
int index; // index of bin to use next |
2593 |
< |
int baseIndex; // current index of initial table |
2594 |
< |
int baseLimit; // index bound for initial table |
2595 |
< |
int baseSize; // initial table size |
2596 |
< |
int batch; // split control |
2597 |
< |
/** Creates iterator for all entries in the table. */ |
2598 |
< |
Traverser(ConcurrentHashMap<K,V> map) { |
2599 |
< |
this.map = map; |
2600 |
< |
Node<V>[] t; |
2601 |
< |
if ((t = tab = map.table) != null) |
2602 |
< |
baseLimit = baseSize = t.length; |
2207 |
< |
} |
2208 |
< |
|
2209 |
< |
/** Task constructor */ |
2210 |
< |
Traverser(ConcurrentHashMap<K,V> map, Traverser<K,V,?> it, int batch) { |
2211 |
< |
super(it); |
2212 |
< |
this.map = map; |
2213 |
< |
this.batch = batch; // -1 if unknown |
2214 |
< |
if (it == null) { |
2215 |
< |
Node<V>[] t; |
2216 |
< |
if ((t = tab = map.table) != null) |
2217 |
< |
baseLimit = baseSize = t.length; |
2218 |
< |
} |
2219 |
< |
else { // split parent |
2220 |
< |
this.tab = it.tab; |
2221 |
< |
this.baseSize = it.baseSize; |
2222 |
< |
int hi = this.baseLimit = it.baseLimit; |
2223 |
< |
it.baseLimit = this.index = this.baseIndex = |
2224 |
< |
(hi + it.baseIndex + 1) >>> 1; |
2225 |
< |
} |
2226 |
< |
} |
2227 |
< |
|
2228 |
< |
/** Spliterator constructor */ |
2229 |
< |
Traverser(ConcurrentHashMap<K,V> map, Traverser<K,V,?> it) { |
2230 |
< |
super(it); |
2231 |
< |
this.map = map; |
2232 |
< |
if (it == null) { |
2233 |
< |
Node<V>[] t; |
2234 |
< |
if ((t = tab = map.table) != null) |
2235 |
< |
baseLimit = baseSize = t.length; |
2236 |
< |
long n = map.sumCount(); |
2237 |
< |
batch = ((n > (long)Integer.MAX_VALUE) ? Integer.MAX_VALUE : |
2238 |
< |
(int)n); |
2239 |
< |
} |
2240 |
< |
else { |
2241 |
< |
this.tab = it.tab; |
2242 |
< |
this.baseSize = it.baseSize; |
2243 |
< |
int hi = this.baseLimit = it.baseLimit; |
2244 |
< |
it.baseLimit = this.index = this.baseIndex = |
2245 |
< |
(hi + it.baseIndex + 1) >>> 1; |
2246 |
< |
this.batch = it.batch >>>= 1; |
2247 |
< |
} |
2248 |
< |
} |
2249 |
< |
|
2250 |
< |
/** |
2251 |
< |
* Advances next; returns nextVal or null if terminated. |
2252 |
< |
* See above for explanation. |
2253 |
< |
*/ |
2254 |
< |
@SuppressWarnings("unchecked") final V advance() { |
2255 |
< |
Node<V> e = next; |
2256 |
< |
V ev = null; |
2257 |
< |
outer: do { |
2258 |
< |
if (e != null) // advance past used/skipped node |
2259 |
< |
e = e.next; |
2260 |
< |
while (e == null) { // get to next non-null bin |
2261 |
< |
ConcurrentHashMap<K,V> m; |
2262 |
< |
Node<V>[] t; int b, i, n; Object ek; // must use locals |
2263 |
< |
if ((t = tab) != null) |
2264 |
< |
n = t.length; |
2265 |
< |
else if ((m = map) != null && (t = tab = m.table) != null) |
2266 |
< |
n = baseLimit = baseSize = t.length; |
2267 |
< |
else |
2268 |
< |
break outer; |
2269 |
< |
if ((b = baseIndex) >= baseLimit || |
2270 |
< |
(i = index) < 0 || i >= n) |
2271 |
< |
break outer; |
2272 |
< |
if ((e = tabAt(t, i)) != null && e.hash < 0) { |
2273 |
< |
if ((ek = e.key) instanceof TreeBin) |
2274 |
< |
e = ((TreeBin<V>)ek).first; |
2275 |
< |
else { |
2276 |
< |
tab = (Node<V>[])ek; |
2277 |
< |
continue; // restarts due to null val |
2585 |
> |
private final void treeifyBin(Node<K,V>[] tab, int index) { |
2586 |
> |
Node<K,V> b; int n, sc; |
2587 |
> |
if (tab != null) { |
2588 |
> |
if ((n = tab.length) < MIN_TREEIFY_CAPACITY) |
2589 |
> |
tryPresize(n << 1); |
2590 |
> |
else if ((b = tabAt(tab, index)) != null && b.hash >= 0) { |
2591 |
> |
synchronized (b) { |
2592 |
> |
if (tabAt(tab, index) == b) { |
2593 |
> |
TreeNode<K,V> hd = null, tl = null; |
2594 |
> |
for (Node<K,V> e = b; e != null; e = e.next) { |
2595 |
> |
TreeNode<K,V> p = |
2596 |
> |
new TreeNode<K,V>(e.hash, e.key, e.val, |
2597 |
> |
null, null); |
2598 |
> |
if ((p.prev = tl) == null) |
2599 |
> |
hd = p; |
2600 |
> |
else |
2601 |
> |
tl.next = p; |
2602 |
> |
tl = p; |
2603 |
|
} |
2604 |
< |
} // visit upper slots if present |
2605 |
< |
index = (i += baseSize) < n ? i : (baseIndex = b + 1); |
2604 |
> |
setTabAt(tab, index, new TreeBin<K,V>(hd)); |
2605 |
> |
} |
2606 |
|
} |
2607 |
< |
nextKey = (K)e.key; |
2283 |
< |
} while ((ev = e.val) == null); // skip deleted or special nodes |
2284 |
< |
next = e; |
2285 |
< |
return nextVal = ev; |
2286 |
< |
} |
2287 |
< |
|
2288 |
< |
public final void remove() { |
2289 |
< |
K k = nextKey; |
2290 |
< |
if (k == null && (advance() == null || (k = nextKey) == null)) |
2291 |
< |
throw new IllegalStateException(); |
2292 |
< |
map.internalReplace(k, null, null); |
2293 |
< |
} |
2294 |
< |
|
2295 |
< |
public final boolean hasNext() { |
2296 |
< |
return nextVal != null || advance() != null; |
2297 |
< |
} |
2298 |
< |
|
2299 |
< |
public final boolean hasMoreElements() { return hasNext(); } |
2300 |
< |
|
2301 |
< |
public void compute() { } // default no-op CountedCompleter body |
2302 |
< |
|
2303 |
< |
/** |
2304 |
< |
* Returns a batch value > 0 if this task should (and must) be |
2305 |
< |
* split, if so, adding to pending count, and in any case |
2306 |
< |
* updating batch value. The initial batch value is approx |
2307 |
< |
* exp2 of the number of times (minus one) to split task by |
2308 |
< |
* two before executing leaf action. This value is faster to |
2309 |
< |
* compute and more convenient to use as a guide to splitting |
2310 |
< |
* than is the depth, since it is used while dividing by two |
2311 |
< |
* anyway. |
2312 |
< |
*/ |
2313 |
< |
final int preSplit() { |
2314 |
< |
int b; ForkJoinPool pool; |
2315 |
< |
if ((b = batch) < 0) { // force initialization |
2316 |
< |
int sp = (((pool = getPool()) == null) ? |
2317 |
< |
ForkJoinPool.getCommonPoolParallelism() : |
2318 |
< |
pool.getParallelism()) << 3; // slack of 8 |
2319 |
< |
long n = map.sumCount(); |
2320 |
< |
b = (n <= 0L) ? 0 : (n < (long)sp) ? (int)n : sp; |
2321 |
< |
} |
2322 |
< |
b = (b <= 1 || baseIndex == baseLimit) ? 0 : (b >>> 1); |
2323 |
< |
if ((batch = b) > 0) |
2324 |
< |
addToPendingCount(1); |
2325 |
< |
return b; |
2326 |
< |
} |
2327 |
< |
|
2328 |
< |
// spliterator support |
2329 |
< |
|
2330 |
< |
public long estimateSize() { |
2331 |
< |
return batch; |
2607 |
> |
} |
2608 |
|
} |
2609 |
|
} |
2610 |
|
|
2335 |
– |
/* ---------------- Public operations -------------- */ |
2336 |
– |
|
2611 |
|
/** |
2612 |
< |
* Creates a new, empty map with the default initial table size (16). |
2612 |
> |
* Returns a list on non-TreeNodes replacing those in given list. |
2613 |
|
*/ |
2614 |
< |
public ConcurrentHashMap() { |
2615 |
< |
} |
2616 |
< |
|
2617 |
< |
/** |
2618 |
< |
* Creates a new, empty map with an initial table size |
2619 |
< |
* accommodating the specified number of elements without the need |
2620 |
< |
* to dynamically resize. |
2621 |
< |
* |
2622 |
< |
* @param initialCapacity The implementation performs internal |
2623 |
< |
* sizing to accommodate this many elements. |
2624 |
< |
* @throws IllegalArgumentException if the initial capacity of |
2351 |
< |
* elements is negative |
2352 |
< |
*/ |
2353 |
< |
public ConcurrentHashMap(int initialCapacity) { |
2354 |
< |
if (initialCapacity < 0) |
2355 |
< |
throw new IllegalArgumentException(); |
2356 |
< |
int cap = ((initialCapacity >= (MAXIMUM_CAPACITY >>> 1)) ? |
2357 |
< |
MAXIMUM_CAPACITY : |
2358 |
< |
tableSizeFor(initialCapacity + (initialCapacity >>> 1) + 1)); |
2359 |
< |
this.sizeCtl = cap; |
2360 |
< |
} |
2361 |
< |
|
2362 |
< |
/** |
2363 |
< |
* Creates a new map with the same mappings as the given map. |
2364 |
< |
* |
2365 |
< |
* @param m the map |
2366 |
< |
*/ |
2367 |
< |
public ConcurrentHashMap(Map<? extends K, ? extends V> m) { |
2368 |
< |
this.sizeCtl = DEFAULT_CAPACITY; |
2369 |
< |
internalPutAll(m); |
2370 |
< |
} |
2371 |
< |
|
2372 |
< |
/** |
2373 |
< |
* Creates a new, empty map with an initial table size based on |
2374 |
< |
* the given number of elements ({@code initialCapacity}) and |
2375 |
< |
* initial table density ({@code loadFactor}). |
2376 |
< |
* |
2377 |
< |
* @param initialCapacity the initial capacity. The implementation |
2378 |
< |
* performs internal sizing to accommodate this many elements, |
2379 |
< |
* given the specified load factor. |
2380 |
< |
* @param loadFactor the load factor (table density) for |
2381 |
< |
* establishing the initial table size |
2382 |
< |
* @throws IllegalArgumentException if the initial capacity of |
2383 |
< |
* elements is negative or the load factor is nonpositive |
2384 |
< |
* |
2385 |
< |
* @since 1.6 |
2386 |
< |
*/ |
2387 |
< |
public ConcurrentHashMap(int initialCapacity, float loadFactor) { |
2388 |
< |
this(initialCapacity, loadFactor, 1); |
2389 |
< |
} |
2390 |
< |
|
2391 |
< |
/** |
2392 |
< |
* Creates a new, empty map with an initial table size based on |
2393 |
< |
* the given number of elements ({@code initialCapacity}), table |
2394 |
< |
* density ({@code loadFactor}), and number of concurrently |
2395 |
< |
* updating threads ({@code concurrencyLevel}). |
2396 |
< |
* |
2397 |
< |
* @param initialCapacity the initial capacity. The implementation |
2398 |
< |
* performs internal sizing to accommodate this many elements, |
2399 |
< |
* given the specified load factor. |
2400 |
< |
* @param loadFactor the load factor (table density) for |
2401 |
< |
* establishing the initial table size |
2402 |
< |
* @param concurrencyLevel the estimated number of concurrently |
2403 |
< |
* updating threads. The implementation may use this value as |
2404 |
< |
* a sizing hint. |
2405 |
< |
* @throws IllegalArgumentException if the initial capacity is |
2406 |
< |
* negative or the load factor or concurrencyLevel are |
2407 |
< |
* nonpositive |
2408 |
< |
*/ |
2409 |
< |
public ConcurrentHashMap(int initialCapacity, |
2410 |
< |
float loadFactor, int concurrencyLevel) { |
2411 |
< |
if (!(loadFactor > 0.0f) || initialCapacity < 0 || concurrencyLevel <= 0) |
2412 |
< |
throw new IllegalArgumentException(); |
2413 |
< |
if (initialCapacity < concurrencyLevel) // Use at least as many bins |
2414 |
< |
initialCapacity = concurrencyLevel; // as estimated threads |
2415 |
< |
long size = (long)(1.0 + (long)initialCapacity / loadFactor); |
2416 |
< |
int cap = (size >= (long)MAXIMUM_CAPACITY) ? |
2417 |
< |
MAXIMUM_CAPACITY : tableSizeFor((int)size); |
2418 |
< |
this.sizeCtl = cap; |
2614 |
> |
static <K,V> Node<K,V> untreeify(Node<K,V> b) { |
2615 |
> |
Node<K,V> hd = null, tl = null; |
2616 |
> |
for (Node<K,V> q = b; q != null; q = q.next) { |
2617 |
> |
Node<K,V> p = new Node<K,V>(q.hash, q.key, q.val, null); |
2618 |
> |
if (tl == null) |
2619 |
> |
hd = p; |
2620 |
> |
else |
2621 |
> |
tl.next = p; |
2622 |
> |
tl = p; |
2623 |
> |
} |
2624 |
> |
return hd; |
2625 |
|
} |
2626 |
|
|
2627 |
< |
/** |
2422 |
< |
* Creates a new {@link Set} backed by a ConcurrentHashMap |
2423 |
< |
* from the given type to {@code Boolean.TRUE}. |
2424 |
< |
* |
2425 |
< |
* @return the new set |
2426 |
< |
*/ |
2427 |
< |
public static <K> KeySetView<K,Boolean> newKeySet() { |
2428 |
< |
return new KeySetView<K,Boolean> |
2429 |
< |
(new ConcurrentHashMap<K,Boolean>(), Boolean.TRUE); |
2430 |
< |
} |
2627 |
> |
/* ---------------- TreeNodes -------------- */ |
2628 |
|
|
2629 |
|
/** |
2630 |
< |
* Creates a new {@link Set} backed by a ConcurrentHashMap |
2434 |
< |
* from the given type to {@code Boolean.TRUE}. |
2435 |
< |
* |
2436 |
< |
* @param initialCapacity The implementation performs internal |
2437 |
< |
* sizing to accommodate this many elements. |
2438 |
< |
* @throws IllegalArgumentException if the initial capacity of |
2439 |
< |
* elements is negative |
2440 |
< |
* @return the new set |
2630 |
> |
* Nodes for use in TreeBins |
2631 |
|
*/ |
2632 |
< |
public static <K> KeySetView<K,Boolean> newKeySet(int initialCapacity) { |
2633 |
< |
return new KeySetView<K,Boolean> |
2634 |
< |
(new ConcurrentHashMap<K,Boolean>(initialCapacity), Boolean.TRUE); |
2635 |
< |
} |
2632 |
> |
static final class TreeNode<K,V> extends Node<K,V> { |
2633 |
> |
TreeNode<K,V> parent; // red-black tree links |
2634 |
> |
TreeNode<K,V> left; |
2635 |
> |
TreeNode<K,V> right; |
2636 |
> |
TreeNode<K,V> prev; // needed to unlink next upon deletion |
2637 |
> |
boolean red; |
2638 |
|
|
2639 |
< |
/** |
2640 |
< |
* {@inheritDoc} |
2641 |
< |
*/ |
2642 |
< |
public boolean isEmpty() { |
2643 |
< |
return sumCount() <= 0L; // ignore transient negative values |
2452 |
< |
} |
2639 |
> |
TreeNode(int hash, K key, V val, Node<K,V> next, |
2640 |
> |
TreeNode<K,V> parent) { |
2641 |
> |
super(hash, key, val, next); |
2642 |
> |
this.parent = parent; |
2643 |
> |
} |
2644 |
|
|
2645 |
< |
/** |
2646 |
< |
* {@inheritDoc} |
2647 |
< |
*/ |
2457 |
< |
public int size() { |
2458 |
< |
long n = sumCount(); |
2459 |
< |
return ((n < 0L) ? 0 : |
2460 |
< |
(n > (long)Integer.MAX_VALUE) ? Integer.MAX_VALUE : |
2461 |
< |
(int)n); |
2462 |
< |
} |
2645 |
> |
Node<K,V> find(int h, Object k) { |
2646 |
> |
return findTreeNode(h, k, null); |
2647 |
> |
} |
2648 |
|
|
2649 |
< |
/** |
2650 |
< |
* Returns the number of mappings. This method should be used |
2651 |
< |
* instead of {@link #size} because a ConcurrentHashMap may |
2652 |
< |
* contain more mappings than can be represented as an int. The |
2653 |
< |
* value returned is an estimate; the actual count may differ if |
2654 |
< |
* there are concurrent insertions or removals. |
2655 |
< |
* |
2656 |
< |
* @return the number of mappings |
2657 |
< |
*/ |
2658 |
< |
public long mappingCount() { |
2659 |
< |
long n = sumCount(); |
2660 |
< |
return (n < 0L) ? 0L : n; // ignore transient negative values |
2649 |
> |
/** |
2650 |
> |
* Returns the TreeNode (or null if not found) for the given key |
2651 |
> |
* starting at given root. |
2652 |
> |
*/ |
2653 |
> |
final TreeNode<K,V> findTreeNode(int h, Object k, Class<?> kc) { |
2654 |
> |
if (k != null) { |
2655 |
> |
TreeNode<K,V> p = this; |
2656 |
> |
do { |
2657 |
> |
int ph, dir; K pk; TreeNode<K,V> q; |
2658 |
> |
TreeNode<K,V> pl = p.left, pr = p.right; |
2659 |
> |
if ((ph = p.hash) > h) |
2660 |
> |
p = pl; |
2661 |
> |
else if (ph < h) |
2662 |
> |
p = pr; |
2663 |
> |
else if ((pk = p.key) == k || (pk != null && k.equals(pk))) |
2664 |
> |
return p; |
2665 |
> |
else if (pl == null) |
2666 |
> |
p = pr; |
2667 |
> |
else if (pr == null) |
2668 |
> |
p = pl; |
2669 |
> |
else if ((kc != null || |
2670 |
> |
(kc = comparableClassFor(k)) != null) && |
2671 |
> |
(dir = compareComparables(kc, k, pk)) != 0) |
2672 |
> |
p = (dir < 0) ? pl : pr; |
2673 |
> |
else if ((q = pr.findTreeNode(h, k, kc)) != null) |
2674 |
> |
return q; |
2675 |
> |
else |
2676 |
> |
p = pl; |
2677 |
> |
} while (p != null); |
2678 |
> |
} |
2679 |
> |
return null; |
2680 |
> |
} |
2681 |
|
} |
2682 |
|
|
2683 |
< |
/** |
2479 |
< |
* Returns the value to which the specified key is mapped, |
2480 |
< |
* or {@code null} if this map contains no mapping for the key. |
2481 |
< |
* |
2482 |
< |
* <p>More formally, if this map contains a mapping from a key |
2483 |
< |
* {@code k} to a value {@code v} such that {@code key.equals(k)}, |
2484 |
< |
* then this method returns {@code v}; otherwise it returns |
2485 |
< |
* {@code null}. (There can be at most one such mapping.) |
2486 |
< |
* |
2487 |
< |
* @throws NullPointerException if the specified key is null |
2488 |
< |
*/ |
2489 |
< |
public V get(Object key) { |
2490 |
< |
return internalGet(key); |
2491 |
< |
} |
2683 |
> |
/* ---------------- TreeBins -------------- */ |
2684 |
|
|
2685 |
|
/** |
2686 |
< |
* Returns the value to which the specified key is mapped, |
2687 |
< |
* or the given defaultValue if this map contains no mapping for the key. |
2688 |
< |
* |
2689 |
< |
* @param key the key |
2690 |
< |
* @param defaultValue the value to return if this map contains |
2691 |
< |
* no mapping for the given key |
2692 |
< |
* @return the mapping for the key, if present; else the defaultValue |
2693 |
< |
* @throws NullPointerException if the specified key is null |
2694 |
< |
*/ |
2695 |
< |
public V getValueOrDefault(Object key, V defaultValue) { |
2696 |
< |
V v; |
2697 |
< |
return (v = internalGet(key)) == null ? defaultValue : v; |
2698 |
< |
} |
2686 |
> |
* TreeNodes used at the heads of bins. TreeBins do not hold user |
2687 |
> |
* keys or values, but instead point to list of TreeNodes and |
2688 |
> |
* their root. They also maintain a parasitic read-write lock |
2689 |
> |
* forcing writers (who hold bin lock) to wait for readers (who do |
2690 |
> |
* not) to complete before tree restructuring operations. |
2691 |
> |
*/ |
2692 |
> |
static final class TreeBin<K,V> extends Node<K,V> { |
2693 |
> |
TreeNode<K,V> root; |
2694 |
> |
volatile TreeNode<K,V> first; |
2695 |
> |
volatile Thread waiter; |
2696 |
> |
volatile int lockState; |
2697 |
> |
// values for lockState |
2698 |
> |
static final int WRITER = 1; // set while holding write lock |
2699 |
> |
static final int WAITER = 2; // set when waiting for write lock |
2700 |
> |
static final int READER = 4; // increment value for setting read lock |
2701 |
> |
|
2702 |
> |
/** |
2703 |
> |
* Tie-breaking utility for ordering insertions when equal |
2704 |
> |
* hashCodes and non-comparable. We don't require a total |
2705 |
> |
* order, just a consistent insertion rule to maintain |
2706 |
> |
* equivalence across rebalancings. Tie-breaking further than |
2707 |
> |
* necessary simplifies testing a bit. |
2708 |
> |
*/ |
2709 |
> |
static int tieBreakOrder(Object a, Object b) { |
2710 |
> |
int d; |
2711 |
> |
if (a == null || b == null || |
2712 |
> |
(d = a.getClass().getName(). |
2713 |
> |
compareTo(b.getClass().getName())) == 0) |
2714 |
> |
d = (System.identityHashCode(a) <= System.identityHashCode(b) ? |
2715 |
> |
-1 : 1); |
2716 |
> |
return d; |
2717 |
> |
} |
2718 |
|
|
2719 |
< |
/** |
2720 |
< |
* Tests if the specified object is a key in this table. |
2721 |
< |
* |
2722 |
< |
* @param key possible key |
2723 |
< |
* @return {@code true} if and only if the specified object |
2724 |
< |
* is a key in this table, as determined by the |
2725 |
< |
* {@code equals} method; {@code false} otherwise |
2726 |
< |
* @throws NullPointerException if the specified key is null |
2727 |
< |
*/ |
2728 |
< |
public boolean containsKey(Object key) { |
2729 |
< |
return internalGet(key) != null; |
2730 |
< |
} |
2719 |
> |
/** |
2720 |
> |
* Creates bin with initial set of nodes headed by b. |
2721 |
> |
*/ |
2722 |
> |
TreeBin(TreeNode<K,V> b) { |
2723 |
> |
super(TREEBIN, null, null, null); |
2724 |
> |
this.first = b; |
2725 |
> |
TreeNode<K,V> r = null; |
2726 |
> |
for (TreeNode<K,V> x = b, next; x != null; x = next) { |
2727 |
> |
next = (TreeNode<K,V>)x.next; |
2728 |
> |
x.left = x.right = null; |
2729 |
> |
if (r == null) { |
2730 |
> |
x.parent = null; |
2731 |
> |
x.red = false; |
2732 |
> |
r = x; |
2733 |
> |
} |
2734 |
> |
else { |
2735 |
> |
K k = x.key; |
2736 |
> |
int h = x.hash; |
2737 |
> |
Class<?> kc = null; |
2738 |
> |
for (TreeNode<K,V> p = r;;) { |
2739 |
> |
int dir, ph; |
2740 |
> |
K pk = p.key; |
2741 |
> |
if ((ph = p.hash) > h) |
2742 |
> |
dir = -1; |
2743 |
> |
else if (ph < h) |
2744 |
> |
dir = 1; |
2745 |
> |
else if ((kc == null && |
2746 |
> |
(kc = comparableClassFor(k)) == null) || |
2747 |
> |
(dir = compareComparables(kc, k, pk)) == 0) |
2748 |
> |
dir = tieBreakOrder(k, pk); |
2749 |
> |
TreeNode<K,V> xp = p; |
2750 |
> |
if ((p = (dir <= 0) ? p.left : p.right) == null) { |
2751 |
> |
x.parent = xp; |
2752 |
> |
if (dir <= 0) |
2753 |
> |
xp.left = x; |
2754 |
> |
else |
2755 |
> |
xp.right = x; |
2756 |
> |
r = balanceInsertion(r, x); |
2757 |
> |
break; |
2758 |
> |
} |
2759 |
> |
} |
2760 |
> |
} |
2761 |
> |
} |
2762 |
> |
this.root = r; |
2763 |
> |
assert checkInvariants(root); |
2764 |
> |
} |
2765 |
|
|
2766 |
< |
/** |
2767 |
< |
* Returns {@code true} if this map maps one or more keys to the |
2768 |
< |
* specified value. Note: This method may require a full traversal |
2769 |
< |
* of the map, and is much slower than method {@code containsKey}. |
2770 |
< |
* |
2771 |
< |
* @param value value whose presence in this map is to be tested |
2527 |
< |
* @return {@code true} if this map maps one or more keys to the |
2528 |
< |
* specified value |
2529 |
< |
* @throws NullPointerException if the specified value is null |
2530 |
< |
*/ |
2531 |
< |
public boolean containsValue(Object value) { |
2532 |
< |
if (value == null) |
2533 |
< |
throw new NullPointerException(); |
2534 |
< |
V v; |
2535 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
2536 |
< |
while ((v = it.advance()) != null) { |
2537 |
< |
if (v == value || value.equals(v)) |
2538 |
< |
return true; |
2766 |
> |
/** |
2767 |
> |
* Acquires write lock for tree restructuring. |
2768 |
> |
*/ |
2769 |
> |
private final void lockRoot() { |
2770 |
> |
if (!U.compareAndSwapInt(this, LOCKSTATE, 0, WRITER)) |
2771 |
> |
contendedLock(); // offload to separate method |
2772 |
|
} |
2540 |
– |
return false; |
2541 |
– |
} |
2773 |
|
|
2774 |
< |
/** |
2775 |
< |
* Legacy method testing if some key maps into the specified value |
2776 |
< |
* in this table. This method is identical in functionality to |
2777 |
< |
* {@link #containsValue(Object)}, and exists solely to ensure |
2778 |
< |
* full compatibility with class {@link java.util.Hashtable}, |
2779 |
< |
* which supported this method prior to introduction of the |
2549 |
< |
* Java Collections framework. |
2550 |
< |
* |
2551 |
< |
* @param value a value to search for |
2552 |
< |
* @return {@code true} if and only if some key maps to the |
2553 |
< |
* {@code value} argument in this table as |
2554 |
< |
* determined by the {@code equals} method; |
2555 |
< |
* {@code false} otherwise |
2556 |
< |
* @throws NullPointerException if the specified value is null |
2557 |
< |
*/ |
2558 |
< |
@Deprecated public boolean contains(Object value) { |
2559 |
< |
return containsValue(value); |
2560 |
< |
} |
2774 |
> |
/** |
2775 |
> |
* Releases write lock for tree restructuring. |
2776 |
> |
*/ |
2777 |
> |
private final void unlockRoot() { |
2778 |
> |
lockState = 0; |
2779 |
> |
} |
2780 |
|
|
2781 |
< |
/** |
2782 |
< |
* Maps the specified key to the specified value in this table. |
2783 |
< |
* Neither the key nor the value can be null. |
2784 |
< |
* |
2785 |
< |
* <p>The value can be retrieved by calling the {@code get} method |
2786 |
< |
* with a key that is equal to the original key. |
2787 |
< |
* |
2788 |
< |
* @param key key with which the specified value is to be associated |
2789 |
< |
* @param value value to be associated with the specified key |
2790 |
< |
* @return the previous value associated with {@code key}, or |
2791 |
< |
* {@code null} if there was no mapping for {@code key} |
2792 |
< |
* @throws NullPointerException if the specified key or value is null |
2793 |
< |
*/ |
2794 |
< |
public V put(K key, V value) { |
2795 |
< |
return internalPut(key, value, false); |
2796 |
< |
} |
2781 |
> |
/** |
2782 |
> |
* Possibly blocks awaiting root lock. |
2783 |
> |
*/ |
2784 |
> |
private final void contendedLock() { |
2785 |
> |
boolean waiting = false; |
2786 |
> |
for (int s;;) { |
2787 |
> |
if (((s = lockState) & ~WAITER) == 0) { |
2788 |
> |
if (U.compareAndSwapInt(this, LOCKSTATE, s, WRITER)) { |
2789 |
> |
if (waiting) |
2790 |
> |
waiter = null; |
2791 |
> |
return; |
2792 |
> |
} |
2793 |
> |
} |
2794 |
> |
else if ((s & WAITER) == 0) { |
2795 |
> |
if (U.compareAndSwapInt(this, LOCKSTATE, s, s | WAITER)) { |
2796 |
> |
waiting = true; |
2797 |
> |
waiter = Thread.currentThread(); |
2798 |
> |
} |
2799 |
> |
} |
2800 |
> |
else if (waiting) |
2801 |
> |
LockSupport.park(this); |
2802 |
> |
} |
2803 |
> |
} |
2804 |
|
|
2805 |
< |
/** |
2806 |
< |
* {@inheritDoc} |
2807 |
< |
* |
2808 |
< |
* @return the previous value associated with the specified key, |
2809 |
< |
* or {@code null} if there was no mapping for the key |
2810 |
< |
* @throws NullPointerException if the specified key or value is null |
2811 |
< |
*/ |
2812 |
< |
public V putIfAbsent(K key, V value) { |
2813 |
< |
return internalPut(key, value, true); |
2814 |
< |
} |
2805 |
> |
/** |
2806 |
> |
* Returns matching node or null if none. Tries to search |
2807 |
> |
* using tree comparisons from root, but continues linear |
2808 |
> |
* search when lock not available. |
2809 |
> |
*/ |
2810 |
> |
final Node<K,V> find(int h, Object k) { |
2811 |
> |
if (k != null) { |
2812 |
> |
for (Node<K,V> e = first; e != null; e = e.next) { |
2813 |
> |
int s; K ek; |
2814 |
> |
if (((s = lockState) & (WAITER|WRITER)) != 0) { |
2815 |
> |
if (e.hash == h && |
2816 |
> |
((ek = e.key) == k || (ek != null && k.equals(ek)))) |
2817 |
> |
return e; |
2818 |
> |
} |
2819 |
> |
else if (U.compareAndSwapInt(this, LOCKSTATE, s, |
2820 |
> |
s + READER)) { |
2821 |
> |
TreeNode<K,V> r, p; |
2822 |
> |
try { |
2823 |
> |
p = ((r = root) == null ? null : |
2824 |
> |
r.findTreeNode(h, k, null)); |
2825 |
> |
} finally { |
2826 |
> |
Thread w; |
2827 |
> |
if (U.getAndAddInt(this, LOCKSTATE, -READER) == |
2828 |
> |
(READER|WAITER) && (w = waiter) != null) |
2829 |
> |
LockSupport.unpark(w); |
2830 |
> |
} |
2831 |
> |
return p; |
2832 |
> |
} |
2833 |
> |
} |
2834 |
> |
} |
2835 |
> |
return null; |
2836 |
> |
} |
2837 |
|
|
2838 |
< |
/** |
2839 |
< |
* Copies all of the mappings from the specified map to this one. |
2840 |
< |
* These mappings replace any mappings that this map had for any of the |
2841 |
< |
* keys currently in the specified map. |
2842 |
< |
* |
2843 |
< |
* @param m mappings to be stored in this map |
2844 |
< |
*/ |
2845 |
< |
public void putAll(Map<? extends K, ? extends V> m) { |
2846 |
< |
internalPutAll(m); |
2847 |
< |
} |
2838 |
> |
/** |
2839 |
> |
* Finds or adds a node. |
2840 |
> |
* @return null if added |
2841 |
> |
*/ |
2842 |
> |
final TreeNode<K,V> putTreeVal(int h, K k, V v) { |
2843 |
> |
Class<?> kc = null; |
2844 |
> |
boolean searched = false; |
2845 |
> |
for (TreeNode<K,V> p = root;;) { |
2846 |
> |
int dir, ph; K pk; |
2847 |
> |
if (p == null) { |
2848 |
> |
first = root = new TreeNode<K,V>(h, k, v, null, null); |
2849 |
> |
break; |
2850 |
> |
} |
2851 |
> |
else if ((ph = p.hash) > h) |
2852 |
> |
dir = -1; |
2853 |
> |
else if (ph < h) |
2854 |
> |
dir = 1; |
2855 |
> |
else if ((pk = p.key) == k || (pk != null && k.equals(pk))) |
2856 |
> |
return p; |
2857 |
> |
else if ((kc == null && |
2858 |
> |
(kc = comparableClassFor(k)) == null) || |
2859 |
> |
(dir = compareComparables(kc, k, pk)) == 0) { |
2860 |
> |
if (!searched) { |
2861 |
> |
TreeNode<K,V> q, ch; |
2862 |
> |
searched = true; |
2863 |
> |
if (((ch = p.left) != null && |
2864 |
> |
(q = ch.findTreeNode(h, k, kc)) != null) || |
2865 |
> |
((ch = p.right) != null && |
2866 |
> |
(q = ch.findTreeNode(h, k, kc)) != null)) |
2867 |
> |
return q; |
2868 |
> |
} |
2869 |
> |
dir = tieBreakOrder(k, pk); |
2870 |
> |
} |
2871 |
> |
|
2872 |
> |
TreeNode<K,V> xp = p; |
2873 |
> |
if ((p = (dir <= 0) ? p.left : p.right) == null) { |
2874 |
> |
TreeNode<K,V> x, f = first; |
2875 |
> |
first = x = new TreeNode<K,V>(h, k, v, f, xp); |
2876 |
> |
if (f != null) |
2877 |
> |
f.prev = x; |
2878 |
> |
if (dir <= 0) |
2879 |
> |
xp.left = x; |
2880 |
> |
else |
2881 |
> |
xp.right = x; |
2882 |
> |
if (!xp.red) |
2883 |
> |
x.red = true; |
2884 |
> |
else { |
2885 |
> |
lockRoot(); |
2886 |
> |
try { |
2887 |
> |
root = balanceInsertion(root, x); |
2888 |
> |
} finally { |
2889 |
> |
unlockRoot(); |
2890 |
> |
} |
2891 |
> |
} |
2892 |
> |
break; |
2893 |
> |
} |
2894 |
> |
} |
2895 |
> |
assert checkInvariants(root); |
2896 |
> |
return null; |
2897 |
> |
} |
2898 |
|
|
2899 |
< |
/** |
2900 |
< |
* If the specified key is not already associated with a value (or |
2901 |
< |
* is mapped to {@code null}), attempts to compute its value using |
2902 |
< |
* the given mapping function and enters it into this map unless |
2903 |
< |
* {@code null}. The entire method invocation is performed |
2904 |
< |
* atomically, so the function is applied at most once per key. |
2905 |
< |
* Some attempted update operations on this map by other threads |
2906 |
< |
* may be blocked while computation is in progress, so the |
2907 |
< |
* computation should be short and simple, and must not attempt to |
2908 |
< |
* update any other mappings of this Map. |
2909 |
< |
* |
2910 |
< |
* @param key key with which the specified value is to be associated |
2911 |
< |
* @param mappingFunction the function to compute a value |
2912 |
< |
* @return the current (existing or computed) value associated with |
2913 |
< |
* the specified key, or null if the computed value is null |
2914 |
< |
* @throws NullPointerException if the specified key or mappingFunction |
2915 |
< |
* is null |
2916 |
< |
* @throws IllegalStateException if the computation detectably |
2917 |
< |
* attempts a recursive update to this map that would |
2918 |
< |
* otherwise never complete |
2919 |
< |
* @throws RuntimeException or Error if the mappingFunction does so, |
2920 |
< |
* in which case the mapping is left unestablished |
2921 |
< |
*/ |
2922 |
< |
public V computeIfAbsent |
2923 |
< |
(K key, Function<? super K, ? extends V> mappingFunction) { |
2924 |
< |
return internalComputeIfAbsent(key, mappingFunction); |
2925 |
< |
} |
2899 |
> |
/** |
2900 |
> |
* Removes the given node, that must be present before this |
2901 |
> |
* call. This is messier than typical red-black deletion code |
2902 |
> |
* because we cannot swap the contents of an interior node |
2903 |
> |
* with a leaf successor that is pinned by "next" pointers |
2904 |
> |
* that are accessible independently of lock. So instead we |
2905 |
> |
* swap the tree linkages. |
2906 |
> |
* |
2907 |
> |
* @return true if now too small, so should be untreeified |
2908 |
> |
*/ |
2909 |
> |
final boolean removeTreeNode(TreeNode<K,V> p) { |
2910 |
> |
TreeNode<K,V> next = (TreeNode<K,V>)p.next; |
2911 |
> |
TreeNode<K,V> pred = p.prev; // unlink traversal pointers |
2912 |
> |
TreeNode<K,V> r, rl; |
2913 |
> |
if (pred == null) |
2914 |
> |
first = next; |
2915 |
> |
else |
2916 |
> |
pred.next = next; |
2917 |
> |
if (next != null) |
2918 |
> |
next.prev = pred; |
2919 |
> |
if (first == null) { |
2920 |
> |
root = null; |
2921 |
> |
return true; |
2922 |
> |
} |
2923 |
> |
if ((r = root) == null || r.right == null || // too small |
2924 |
> |
(rl = r.left) == null || rl.left == null) |
2925 |
> |
return true; |
2926 |
> |
lockRoot(); |
2927 |
> |
try { |
2928 |
> |
TreeNode<K,V> replacement; |
2929 |
> |
TreeNode<K,V> pl = p.left; |
2930 |
> |
TreeNode<K,V> pr = p.right; |
2931 |
> |
if (pl != null && pr != null) { |
2932 |
> |
TreeNode<K,V> s = pr, sl; |
2933 |
> |
while ((sl = s.left) != null) // find successor |
2934 |
> |
s = sl; |
2935 |
> |
boolean c = s.red; s.red = p.red; p.red = c; // swap colors |
2936 |
> |
TreeNode<K,V> sr = s.right; |
2937 |
> |
TreeNode<K,V> pp = p.parent; |
2938 |
> |
if (s == pr) { // p was s's direct parent |
2939 |
> |
p.parent = s; |
2940 |
> |
s.right = p; |
2941 |
> |
} |
2942 |
> |
else { |
2943 |
> |
TreeNode<K,V> sp = s.parent; |
2944 |
> |
if ((p.parent = sp) != null) { |
2945 |
> |
if (s == sp.left) |
2946 |
> |
sp.left = p; |
2947 |
> |
else |
2948 |
> |
sp.right = p; |
2949 |
> |
} |
2950 |
> |
if ((s.right = pr) != null) |
2951 |
> |
pr.parent = s; |
2952 |
> |
} |
2953 |
> |
p.left = null; |
2954 |
> |
if ((p.right = sr) != null) |
2955 |
> |
sr.parent = p; |
2956 |
> |
if ((s.left = pl) != null) |
2957 |
> |
pl.parent = s; |
2958 |
> |
if ((s.parent = pp) == null) |
2959 |
> |
r = s; |
2960 |
> |
else if (p == pp.left) |
2961 |
> |
pp.left = s; |
2962 |
> |
else |
2963 |
> |
pp.right = s; |
2964 |
> |
if (sr != null) |
2965 |
> |
replacement = sr; |
2966 |
> |
else |
2967 |
> |
replacement = p; |
2968 |
> |
} |
2969 |
> |
else if (pl != null) |
2970 |
> |
replacement = pl; |
2971 |
> |
else if (pr != null) |
2972 |
> |
replacement = pr; |
2973 |
> |
else |
2974 |
> |
replacement = p; |
2975 |
> |
if (replacement != p) { |
2976 |
> |
TreeNode<K,V> pp = replacement.parent = p.parent; |
2977 |
> |
if (pp == null) |
2978 |
> |
r = replacement; |
2979 |
> |
else if (p == pp.left) |
2980 |
> |
pp.left = replacement; |
2981 |
> |
else |
2982 |
> |
pp.right = replacement; |
2983 |
> |
p.left = p.right = p.parent = null; |
2984 |
> |
} |
2985 |
|
|
2986 |
< |
/** |
2630 |
< |
* If the value for the specified key is present and non-null, |
2631 |
< |
* attempts to compute a new mapping given the key and its current |
2632 |
< |
* mapped value. The entire method invocation is performed |
2633 |
< |
* atomically. Some attempted update operations on this map by |
2634 |
< |
* other threads may be blocked while computation is in progress, |
2635 |
< |
* so the computation should be short and simple, and must not |
2636 |
< |
* attempt to update any other mappings of this Map. |
2637 |
< |
* |
2638 |
< |
* @param key key with which the specified value is to be associated |
2639 |
< |
* @param remappingFunction the function to compute a value |
2640 |
< |
* @return the new value associated with the specified key, or null if none |
2641 |
< |
* @throws NullPointerException if the specified key or remappingFunction |
2642 |
< |
* is null |
2643 |
< |
* @throws IllegalStateException if the computation detectably |
2644 |
< |
* attempts a recursive update to this map that would |
2645 |
< |
* otherwise never complete |
2646 |
< |
* @throws RuntimeException or Error if the remappingFunction does so, |
2647 |
< |
* in which case the mapping is unchanged |
2648 |
< |
*/ |
2649 |
< |
public V computeIfPresent |
2650 |
< |
(K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) { |
2651 |
< |
return internalCompute(key, true, remappingFunction); |
2652 |
< |
} |
2986 |
> |
root = (p.red) ? r : balanceDeletion(r, replacement); |
2987 |
|
|
2988 |
< |
/** |
2989 |
< |
* Attempts to compute a mapping for the specified key and its |
2990 |
< |
* current mapped value (or {@code null} if there is no current |
2991 |
< |
* mapping). The entire method invocation is performed atomically. |
2992 |
< |
* Some attempted update operations on this map by other threads |
2993 |
< |
* may be blocked while computation is in progress, so the |
2994 |
< |
* computation should be short and simple, and must not attempt to |
2995 |
< |
* update any other mappings of this Map. |
2996 |
< |
* |
2997 |
< |
* @param key key with which the specified value is to be associated |
2998 |
< |
* @param remappingFunction the function to compute a value |
2999 |
< |
* @return the new value associated with the specified key, or null if none |
3000 |
< |
* @throws NullPointerException if the specified key or remappingFunction |
3001 |
< |
* is null |
3002 |
< |
* @throws IllegalStateException if the computation detectably |
3003 |
< |
* attempts a recursive update to this map that would |
2670 |
< |
* otherwise never complete |
2671 |
< |
* @throws RuntimeException or Error if the remappingFunction does so, |
2672 |
< |
* in which case the mapping is unchanged |
2673 |
< |
*/ |
2674 |
< |
public V compute |
2675 |
< |
(K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) { |
2676 |
< |
return internalCompute(key, false, remappingFunction); |
2677 |
< |
} |
2988 |
> |
if (p == replacement) { // detach pointers |
2989 |
> |
TreeNode<K,V> pp; |
2990 |
> |
if ((pp = p.parent) != null) { |
2991 |
> |
if (p == pp.left) |
2992 |
> |
pp.left = null; |
2993 |
> |
else if (p == pp.right) |
2994 |
> |
pp.right = null; |
2995 |
> |
p.parent = null; |
2996 |
> |
} |
2997 |
> |
} |
2998 |
> |
} finally { |
2999 |
> |
unlockRoot(); |
3000 |
> |
} |
3001 |
> |
assert checkInvariants(root); |
3002 |
> |
return false; |
3003 |
> |
} |
3004 |
|
|
3005 |
< |
/** |
3006 |
< |
* If the specified key is not already associated with a |
2681 |
< |
* (non-null) value, associates it with the given value. |
2682 |
< |
* Otherwise, replaces the value with the results of the given |
2683 |
< |
* remapping function, or removes if {@code null}. The entire |
2684 |
< |
* method invocation is performed atomically. Some attempted |
2685 |
< |
* update operations on this map by other threads may be blocked |
2686 |
< |
* while computation is in progress, so the computation should be |
2687 |
< |
* short and simple, and must not attempt to update any other |
2688 |
< |
* mappings of this Map. |
2689 |
< |
* |
2690 |
< |
* @param key key with which the specified value is to be associated |
2691 |
< |
* @param value the value to use if absent |
2692 |
< |
* @param remappingFunction the function to recompute a value if present |
2693 |
< |
* @return the new value associated with the specified key, or null if none |
2694 |
< |
* @throws NullPointerException if the specified key or the |
2695 |
< |
* remappingFunction is null |
2696 |
< |
* @throws RuntimeException or Error if the remappingFunction does so, |
2697 |
< |
* in which case the mapping is unchanged |
2698 |
< |
*/ |
2699 |
< |
public V merge |
2700 |
< |
(K key, V value, |
2701 |
< |
BiFunction<? super V, ? super V, ? extends V> remappingFunction) { |
2702 |
< |
return internalMerge(key, value, remappingFunction); |
2703 |
< |
} |
3005 |
> |
/* ------------------------------------------------------------ */ |
3006 |
> |
// Red-black tree methods, all adapted from CLR |
3007 |
|
|
3008 |
< |
/** |
3009 |
< |
* Removes the key (and its corresponding value) from this map. |
3010 |
< |
* This method does nothing if the key is not in the map. |
3011 |
< |
* |
3012 |
< |
* @param key the key that needs to be removed |
3013 |
< |
* @return the previous value associated with {@code key}, or |
3014 |
< |
* {@code null} if there was no mapping for {@code key} |
3015 |
< |
* @throws NullPointerException if the specified key is null |
3016 |
< |
*/ |
3017 |
< |
public V remove(Object key) { |
3018 |
< |
return internalReplace(key, null, null); |
3019 |
< |
} |
3008 |
> |
static <K,V> TreeNode<K,V> rotateLeft(TreeNode<K,V> root, |
3009 |
> |
TreeNode<K,V> p) { |
3010 |
> |
TreeNode<K,V> r, pp, rl; |
3011 |
> |
if (p != null && (r = p.right) != null) { |
3012 |
> |
if ((rl = p.right = r.left) != null) |
3013 |
> |
rl.parent = p; |
3014 |
> |
if ((pp = r.parent = p.parent) == null) |
3015 |
> |
(root = r).red = false; |
3016 |
> |
else if (pp.left == p) |
3017 |
> |
pp.left = r; |
3018 |
> |
else |
3019 |
> |
pp.right = r; |
3020 |
> |
r.left = p; |
3021 |
> |
p.parent = r; |
3022 |
> |
} |
3023 |
> |
return root; |
3024 |
> |
} |
3025 |
|
|
3026 |
< |
/** |
3027 |
< |
* {@inheritDoc} |
3028 |
< |
* |
3029 |
< |
* @throws NullPointerException if the specified key is null |
3030 |
< |
*/ |
3031 |
< |
public boolean remove(Object key, Object value) { |
3032 |
< |
if (key == null) |
3033 |
< |
throw new NullPointerException(); |
3034 |
< |
return value != null && internalReplace(key, null, value) != null; |
3035 |
< |
} |
3026 |
> |
static <K,V> TreeNode<K,V> rotateRight(TreeNode<K,V> root, |
3027 |
> |
TreeNode<K,V> p) { |
3028 |
> |
TreeNode<K,V> l, pp, lr; |
3029 |
> |
if (p != null && (l = p.left) != null) { |
3030 |
> |
if ((lr = p.left = l.right) != null) |
3031 |
> |
lr.parent = p; |
3032 |
> |
if ((pp = l.parent = p.parent) == null) |
3033 |
> |
(root = l).red = false; |
3034 |
> |
else if (pp.right == p) |
3035 |
> |
pp.right = l; |
3036 |
> |
else |
3037 |
> |
pp.left = l; |
3038 |
> |
l.right = p; |
3039 |
> |
p.parent = l; |
3040 |
> |
} |
3041 |
> |
return root; |
3042 |
> |
} |
3043 |
|
|
3044 |
< |
/** |
3045 |
< |
* {@inheritDoc} |
3046 |
< |
* |
3047 |
< |
* @throws NullPointerException if any of the arguments are null |
3048 |
< |
*/ |
3049 |
< |
public boolean replace(K key, V oldValue, V newValue) { |
3050 |
< |
if (key == null || oldValue == null || newValue == null) |
3051 |
< |
throw new NullPointerException(); |
3052 |
< |
return internalReplace(key, newValue, oldValue) != null; |
3053 |
< |
} |
3044 |
> |
static <K,V> TreeNode<K,V> balanceInsertion(TreeNode<K,V> root, |
3045 |
> |
TreeNode<K,V> x) { |
3046 |
> |
x.red = true; |
3047 |
> |
for (TreeNode<K,V> xp, xpp, xppl, xppr;;) { |
3048 |
> |
if ((xp = x.parent) == null) { |
3049 |
> |
x.red = false; |
3050 |
> |
return x; |
3051 |
> |
} |
3052 |
> |
else if (!xp.red || (xpp = xp.parent) == null) |
3053 |
> |
return root; |
3054 |
> |
if (xp == (xppl = xpp.left)) { |
3055 |
> |
if ((xppr = xpp.right) != null && xppr.red) { |
3056 |
> |
xppr.red = false; |
3057 |
> |
xp.red = false; |
3058 |
> |
xpp.red = true; |
3059 |
> |
x = xpp; |
3060 |
> |
} |
3061 |
> |
else { |
3062 |
> |
if (x == xp.right) { |
3063 |
> |
root = rotateLeft(root, x = xp); |
3064 |
> |
xpp = (xp = x.parent) == null ? null : xp.parent; |
3065 |
> |
} |
3066 |
> |
if (xp != null) { |
3067 |
> |
xp.red = false; |
3068 |
> |
if (xpp != null) { |
3069 |
> |
xpp.red = true; |
3070 |
> |
root = rotateRight(root, xpp); |
3071 |
> |
} |
3072 |
> |
} |
3073 |
> |
} |
3074 |
> |
} |
3075 |
> |
else { |
3076 |
> |
if (xppl != null && xppl.red) { |
3077 |
> |
xppl.red = false; |
3078 |
> |
xp.red = false; |
3079 |
> |
xpp.red = true; |
3080 |
> |
x = xpp; |
3081 |
> |
} |
3082 |
> |
else { |
3083 |
> |
if (x == xp.left) { |
3084 |
> |
root = rotateRight(root, x = xp); |
3085 |
> |
xpp = (xp = x.parent) == null ? null : xp.parent; |
3086 |
> |
} |
3087 |
> |
if (xp != null) { |
3088 |
> |
xp.red = false; |
3089 |
> |
if (xpp != null) { |
3090 |
> |
xpp.red = true; |
3091 |
> |
root = rotateLeft(root, xpp); |
3092 |
> |
} |
3093 |
> |
} |
3094 |
> |
} |
3095 |
> |
} |
3096 |
> |
} |
3097 |
> |
} |
3098 |
|
|
3099 |
< |
/** |
3100 |
< |
* {@inheritDoc} |
3101 |
< |
* |
3102 |
< |
* @return the previous value associated with the specified key, |
3103 |
< |
* or {@code null} if there was no mapping for the key |
3104 |
< |
* @throws NullPointerException if the specified key or value is null |
3105 |
< |
*/ |
3106 |
< |
public V replace(K key, V value) { |
3107 |
< |
if (key == null || value == null) |
3108 |
< |
throw new NullPointerException(); |
3109 |
< |
return internalReplace(key, value, null); |
3110 |
< |
} |
3099 |
> |
static <K,V> TreeNode<K,V> balanceDeletion(TreeNode<K,V> root, |
3100 |
> |
TreeNode<K,V> x) { |
3101 |
> |
for (TreeNode<K,V> xp, xpl, xpr;;) { |
3102 |
> |
if (x == null || x == root) |
3103 |
> |
return root; |
3104 |
> |
else if ((xp = x.parent) == null) { |
3105 |
> |
x.red = false; |
3106 |
> |
return x; |
3107 |
> |
} |
3108 |
> |
else if (x.red) { |
3109 |
> |
x.red = false; |
3110 |
> |
return root; |
3111 |
> |
} |
3112 |
> |
else if ((xpl = xp.left) == x) { |
3113 |
> |
if ((xpr = xp.right) != null && xpr.red) { |
3114 |
> |
xpr.red = false; |
3115 |
> |
xp.red = true; |
3116 |
> |
root = rotateLeft(root, xp); |
3117 |
> |
xpr = (xp = x.parent) == null ? null : xp.right; |
3118 |
> |
} |
3119 |
> |
if (xpr == null) |
3120 |
> |
x = xp; |
3121 |
> |
else { |
3122 |
> |
TreeNode<K,V> sl = xpr.left, sr = xpr.right; |
3123 |
> |
if ((sr == null || !sr.red) && |
3124 |
> |
(sl == null || !sl.red)) { |
3125 |
> |
xpr.red = true; |
3126 |
> |
x = xp; |
3127 |
> |
} |
3128 |
> |
else { |
3129 |
> |
if (sr == null || !sr.red) { |
3130 |
> |
if (sl != null) |
3131 |
> |
sl.red = false; |
3132 |
> |
xpr.red = true; |
3133 |
> |
root = rotateRight(root, xpr); |
3134 |
> |
xpr = (xp = x.parent) == null ? |
3135 |
> |
null : xp.right; |
3136 |
> |
} |
3137 |
> |
if (xpr != null) { |
3138 |
> |
xpr.red = (xp == null) ? false : xp.red; |
3139 |
> |
if ((sr = xpr.right) != null) |
3140 |
> |
sr.red = false; |
3141 |
> |
} |
3142 |
> |
if (xp != null) { |
3143 |
> |
xp.red = false; |
3144 |
> |
root = rotateLeft(root, xp); |
3145 |
> |
} |
3146 |
> |
x = root; |
3147 |
> |
} |
3148 |
> |
} |
3149 |
> |
} |
3150 |
> |
else { // symmetric |
3151 |
> |
if (xpl != null && xpl.red) { |
3152 |
> |
xpl.red = false; |
3153 |
> |
xp.red = true; |
3154 |
> |
root = rotateRight(root, xp); |
3155 |
> |
xpl = (xp = x.parent) == null ? null : xp.left; |
3156 |
> |
} |
3157 |
> |
if (xpl == null) |
3158 |
> |
x = xp; |
3159 |
> |
else { |
3160 |
> |
TreeNode<K,V> sl = xpl.left, sr = xpl.right; |
3161 |
> |
if ((sl == null || !sl.red) && |
3162 |
> |
(sr == null || !sr.red)) { |
3163 |
> |
xpl.red = true; |
3164 |
> |
x = xp; |
3165 |
> |
} |
3166 |
> |
else { |
3167 |
> |
if (sl == null || !sl.red) { |
3168 |
> |
if (sr != null) |
3169 |
> |
sr.red = false; |
3170 |
> |
xpl.red = true; |
3171 |
> |
root = rotateLeft(root, xpl); |
3172 |
> |
xpl = (xp = x.parent) == null ? |
3173 |
> |
null : xp.left; |
3174 |
> |
} |
3175 |
> |
if (xpl != null) { |
3176 |
> |
xpl.red = (xp == null) ? false : xp.red; |
3177 |
> |
if ((sl = xpl.left) != null) |
3178 |
> |
sl.red = false; |
3179 |
> |
} |
3180 |
> |
if (xp != null) { |
3181 |
> |
xp.red = false; |
3182 |
> |
root = rotateRight(root, xp); |
3183 |
> |
} |
3184 |
> |
x = root; |
3185 |
> |
} |
3186 |
> |
} |
3187 |
> |
} |
3188 |
> |
} |
3189 |
> |
} |
3190 |
|
|
3191 |
< |
/** |
3192 |
< |
* Removes all of the mappings from this map. |
3193 |
< |
*/ |
3194 |
< |
public void clear() { |
3195 |
< |
internalClear(); |
3196 |
< |
} |
3191 |
> |
/** |
3192 |
> |
* Recursive invariant check |
3193 |
> |
*/ |
3194 |
> |
static <K,V> boolean checkInvariants(TreeNode<K,V> t) { |
3195 |
> |
TreeNode<K,V> tp = t.parent, tl = t.left, tr = t.right, |
3196 |
> |
tb = t.prev, tn = (TreeNode<K,V>)t.next; |
3197 |
> |
if (tb != null && tb.next != t) |
3198 |
> |
return false; |
3199 |
> |
if (tn != null && tn.prev != t) |
3200 |
> |
return false; |
3201 |
> |
if (tp != null && t != tp.left && t != tp.right) |
3202 |
> |
return false; |
3203 |
> |
if (tl != null && (tl.parent != t || tl.hash > t.hash)) |
3204 |
> |
return false; |
3205 |
> |
if (tr != null && (tr.parent != t || tr.hash < t.hash)) |
3206 |
> |
return false; |
3207 |
> |
if (t.red && tl != null && tl.red && tr != null && tr.red) |
3208 |
> |
return false; |
3209 |
> |
if (tl != null && !checkInvariants(tl)) |
3210 |
> |
return false; |
3211 |
> |
if (tr != null && !checkInvariants(tr)) |
3212 |
> |
return false; |
3213 |
> |
return true; |
3214 |
> |
} |
3215 |
|
|
3216 |
< |
/** |
3217 |
< |
* Returns a {@link Set} view of the keys contained in this map. |
3218 |
< |
* The set is backed by the map, so changes to the map are |
3219 |
< |
* reflected in the set, and vice-versa. |
3220 |
< |
* |
3221 |
< |
* @return the set view |
3222 |
< |
*/ |
3223 |
< |
public KeySetView<K,V> keySet() { |
3224 |
< |
KeySetView<K,V> ks = keySet; |
3225 |
< |
return (ks != null) ? ks : (keySet = new KeySetView<K,V>(this, null)); |
3216 |
> |
private static final sun.misc.Unsafe U; |
3217 |
> |
private static final long LOCKSTATE; |
3218 |
> |
static { |
3219 |
> |
try { |
3220 |
> |
U = sun.misc.Unsafe.getUnsafe(); |
3221 |
> |
Class<?> k = TreeBin.class; |
3222 |
> |
LOCKSTATE = U.objectFieldOffset |
3223 |
> |
(k.getDeclaredField("lockState")); |
3224 |
> |
} catch (Exception e) { |
3225 |
> |
throw new Error(e); |
3226 |
> |
} |
3227 |
> |
} |
3228 |
|
} |
3229 |
|
|
3230 |
< |
/** |
2773 |
< |
* Returns a {@link Set} view of the keys in this map, using the |
2774 |
< |
* given common mapped value for any additions (i.e., {@link |
2775 |
< |
* Collection#add} and {@link Collection#addAll(Collection)}). |
2776 |
< |
* This is of course only appropriate if it is acceptable to use |
2777 |
< |
* the same value for all additions from this view. |
2778 |
< |
* |
2779 |
< |
* @param mappedValue the mapped value to use for any additions |
2780 |
< |
* @return the set view |
2781 |
< |
* @throws NullPointerException if the mappedValue is null |
2782 |
< |
*/ |
2783 |
< |
public KeySetView<K,V> keySet(V mappedValue) { |
2784 |
< |
if (mappedValue == null) |
2785 |
< |
throw new NullPointerException(); |
2786 |
< |
return new KeySetView<K,V>(this, mappedValue); |
2787 |
< |
} |
3230 |
> |
/* ----------------Table Traversal -------------- */ |
3231 |
|
|
3232 |
|
/** |
3233 |
< |
* Returns a {@link Collection} view of the values contained in this map. |
3234 |
< |
* The collection is backed by the map, so changes to the map are |
3235 |
< |
* reflected in the collection, and vice-versa. |
3236 |
< |
* |
3237 |
< |
* @return the collection view |
3238 |
< |
*/ |
3239 |
< |
public ValuesView<K,V> values() { |
3240 |
< |
ValuesView<K,V> vs = values; |
3241 |
< |
return (vs != null) ? vs : (values = new ValuesView<K,V>(this)); |
3233 |
> |
* Records the table, its length, and current traversal index for a |
3234 |
> |
* traverser that must process a region of a forwarded table before |
3235 |
> |
* proceeding with current table. |
3236 |
> |
*/ |
3237 |
> |
static final class TableStack<K,V> { |
3238 |
> |
int length; |
3239 |
> |
int index; |
3240 |
> |
Node<K,V>[] tab; |
3241 |
> |
TableStack<K,V> next; |
3242 |
|
} |
3243 |
|
|
3244 |
|
/** |
3245 |
< |
* Returns a {@link Set} view of the mappings contained in this map. |
3246 |
< |
* The set is backed by the map, so changes to the map are |
2804 |
< |
* reflected in the set, and vice-versa. The set supports element |
2805 |
< |
* removal, which removes the corresponding mapping from the map, |
2806 |
< |
* via the {@code Iterator.remove}, {@code Set.remove}, |
2807 |
< |
* {@code removeAll}, {@code retainAll}, and {@code clear} |
2808 |
< |
* operations. It does not support the {@code add} or |
2809 |
< |
* {@code addAll} operations. |
2810 |
< |
* |
2811 |
< |
* <p>The view's {@code iterator} is a "weakly consistent" iterator |
2812 |
< |
* that will never throw {@link ConcurrentModificationException}, |
2813 |
< |
* and guarantees to traverse elements as they existed upon |
2814 |
< |
* construction of the iterator, and may (but is not guaranteed to) |
2815 |
< |
* reflect any modifications subsequent to construction. |
3245 |
> |
* Encapsulates traversal for methods such as containsValue; also |
3246 |
> |
* serves as a base class for other iterators and spliterators. |
3247 |
|
* |
3248 |
< |
* @return the set view |
3249 |
< |
*/ |
3250 |
< |
public Set<Map.Entry<K,V>> entrySet() { |
3251 |
< |
EntrySetView<K,V> es = entrySet; |
3252 |
< |
return (es != null) ? es : (entrySet = new EntrySetView<K,V>(this)); |
3253 |
< |
} |
3254 |
< |
|
3255 |
< |
/** |
2825 |
< |
* Returns an enumeration of the keys in this table. |
3248 |
> |
* Method advance visits once each still-valid node that was |
3249 |
> |
* reachable upon iterator construction. It might miss some that |
3250 |
> |
* were added to a bin after the bin was visited, which is OK wrt |
3251 |
> |
* consistency guarantees. Maintaining this property in the face |
3252 |
> |
* of possible ongoing resizes requires a fair amount of |
3253 |
> |
* bookkeeping state that is difficult to optimize away amidst |
3254 |
> |
* volatile accesses. Even so, traversal maintains reasonable |
3255 |
> |
* throughput. |
3256 |
|
* |
3257 |
< |
* @return an enumeration of the keys in this table |
3258 |
< |
* @see #keySet() |
3257 |
> |
* Normally, iteration proceeds bin-by-bin traversing lists. |
3258 |
> |
* However, if the table has been resized, then all future steps |
3259 |
> |
* must traverse both the bin at the current index as well as at |
3260 |
> |
* (index + baseSize); and so on for further resizings. To |
3261 |
> |
* paranoically cope with potential sharing by users of iterators |
3262 |
> |
* across threads, iteration terminates if a bounds checks fails |
3263 |
> |
* for a table read. |
3264 |
|
*/ |
3265 |
< |
public Enumeration<K> keys() { |
3266 |
< |
return new KeyIterator<K,V>(this); |
3267 |
< |
} |
3265 |
> |
static class Traverser<K,V> { |
3266 |
> |
Node<K,V>[] tab; // current table; updated if resized |
3267 |
> |
Node<K,V> next; // the next entry to use |
3268 |
> |
TableStack<K,V> stack, spare; // to save/restore on ForwardingNodes |
3269 |
> |
int index; // index of bin to use next |
3270 |
> |
int baseIndex; // current index of initial table |
3271 |
> |
int baseLimit; // index bound for initial table |
3272 |
> |
final int baseSize; // initial table size |
3273 |
> |
|
3274 |
> |
Traverser(Node<K,V>[] tab, int size, int index, int limit) { |
3275 |
> |
this.tab = tab; |
3276 |
> |
this.baseSize = size; |
3277 |
> |
this.baseIndex = this.index = index; |
3278 |
> |
this.baseLimit = limit; |
3279 |
> |
this.next = null; |
3280 |
> |
} |
3281 |
|
|
3282 |
< |
/** |
3283 |
< |
* Returns an enumeration of the values in this table. |
3284 |
< |
* |
3285 |
< |
* @return an enumeration of the values in this table |
3286 |
< |
* @see #values() |
3287 |
< |
*/ |
3288 |
< |
public Enumeration<V> elements() { |
3289 |
< |
return new ValueIterator<K,V>(this); |
3290 |
< |
} |
3282 |
> |
/** |
3283 |
> |
* Advances if possible, returning next valid node, or null if none. |
3284 |
> |
*/ |
3285 |
> |
final Node<K,V> advance() { |
3286 |
> |
Node<K,V> e; |
3287 |
> |
if ((e = next) != null) |
3288 |
> |
e = e.next; |
3289 |
> |
for (;;) { |
3290 |
> |
Node<K,V>[] t; int i, n; // must use locals in checks |
3291 |
> |
if (e != null) |
3292 |
> |
return next = e; |
3293 |
> |
if (baseIndex >= baseLimit || (t = tab) == null || |
3294 |
> |
(n = t.length) <= (i = index) || i < 0) |
3295 |
> |
return next = null; |
3296 |
> |
if ((e = tabAt(t, i)) != null && e.hash < 0) { |
3297 |
> |
if (e instanceof ForwardingNode) { |
3298 |
> |
tab = ((ForwardingNode<K,V>)e).nextTable; |
3299 |
> |
e = null; |
3300 |
> |
pushState(t, i, n); |
3301 |
> |
continue; |
3302 |
> |
} |
3303 |
> |
else if (e instanceof TreeBin) |
3304 |
> |
e = ((TreeBin<K,V>)e).first; |
3305 |
> |
else |
3306 |
> |
e = null; |
3307 |
> |
} |
3308 |
> |
if (stack != null) |
3309 |
> |
recoverState(n); |
3310 |
> |
else if ((index = i + baseSize) >= n) |
3311 |
> |
index = ++baseIndex; // visit upper slots if present |
3312 |
> |
} |
3313 |
> |
} |
3314 |
|
|
3315 |
< |
/** |
3316 |
< |
* Returns the hash code value for this {@link Map}, i.e., |
3317 |
< |
* the sum of, for each key-value pair in the map, |
3318 |
< |
* {@code key.hashCode() ^ value.hashCode()}. |
3319 |
< |
* |
3320 |
< |
* @return the hash code value for this map |
3321 |
< |
*/ |
3322 |
< |
public int hashCode() { |
3323 |
< |
int h = 0; |
3324 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3325 |
< |
V v; |
3326 |
< |
while ((v = it.advance()) != null) { |
3327 |
< |
h += it.nextKey.hashCode() ^ v.hashCode(); |
3315 |
> |
/** |
3316 |
> |
* Saves traversal state upon encountering a forwarding node. |
3317 |
> |
*/ |
3318 |
> |
private void pushState(Node<K,V>[] t, int i, int n) { |
3319 |
> |
TableStack<K,V> s = spare; // reuse if possible |
3320 |
> |
if (s != null) |
3321 |
> |
spare = s.next; |
3322 |
> |
else |
3323 |
> |
s = new TableStack<K,V>(); |
3324 |
> |
s.tab = t; |
3325 |
> |
s.length = n; |
3326 |
> |
s.index = i; |
3327 |
> |
s.next = stack; |
3328 |
> |
stack = s; |
3329 |
|
} |
2858 |
– |
return h; |
2859 |
– |
} |
3330 |
|
|
3331 |
< |
/** |
3332 |
< |
* Returns a string representation of this map. The string |
3333 |
< |
* representation consists of a list of key-value mappings (in no |
3334 |
< |
* particular order) enclosed in braces ("{@code {}}"). Adjacent |
3335 |
< |
* mappings are separated by the characters {@code ", "} (comma |
3336 |
< |
* and space). Each key-value mapping is rendered as the key |
3337 |
< |
* followed by an equals sign ("{@code =}") followed by the |
3338 |
< |
* associated value. |
3339 |
< |
* |
3340 |
< |
* @return a string representation of this map |
3341 |
< |
*/ |
3342 |
< |
public String toString() { |
3343 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3344 |
< |
StringBuilder sb = new StringBuilder(); |
3345 |
< |
sb.append('{'); |
3346 |
< |
V v; |
2877 |
< |
if ((v = it.advance()) != null) { |
2878 |
< |
for (;;) { |
2879 |
< |
K k = it.nextKey; |
2880 |
< |
sb.append(k == this ? "(this Map)" : k); |
2881 |
< |
sb.append('='); |
2882 |
< |
sb.append(v == this ? "(this Map)" : v); |
2883 |
< |
if ((v = it.advance()) == null) |
2884 |
< |
break; |
2885 |
< |
sb.append(',').append(' '); |
3331 |
> |
/** |
3332 |
> |
* Possibly pops traversal state. |
3333 |
> |
* |
3334 |
> |
* @param n length of current table |
3335 |
> |
*/ |
3336 |
> |
private void recoverState(int n) { |
3337 |
> |
TableStack<K,V> s; int len; |
3338 |
> |
while ((s = stack) != null && (index += (len = s.length)) >= n) { |
3339 |
> |
n = len; |
3340 |
> |
index = s.index; |
3341 |
> |
tab = s.tab; |
3342 |
> |
s.tab = null; |
3343 |
> |
TableStack<K,V> next = s.next; |
3344 |
> |
s.next = spare; // save for reuse |
3345 |
> |
stack = next; |
3346 |
> |
spare = s; |
3347 |
|
} |
3348 |
+ |
if (s == null && (index += baseSize) >= n) |
3349 |
+ |
index = ++baseIndex; |
3350 |
|
} |
2888 |
– |
return sb.append('}').toString(); |
3351 |
|
} |
3352 |
|
|
3353 |
|
/** |
3354 |
< |
* Compares the specified object with this map for equality. |
3355 |
< |
* Returns {@code true} if the given object is a map with the same |
2894 |
< |
* mappings as this map. This operation may return misleading |
2895 |
< |
* results if either map is concurrently modified during execution |
2896 |
< |
* of this method. |
2897 |
< |
* |
2898 |
< |
* @param o object to be compared for equality with this map |
2899 |
< |
* @return {@code true} if the specified object is equal to this map |
3354 |
> |
* Base of key, value, and entry Iterators. Adds fields to |
3355 |
> |
* Traverser to support iterator.remove. |
3356 |
|
*/ |
3357 |
< |
public boolean equals(Object o) { |
3358 |
< |
if (o != this) { |
3359 |
< |
if (!(o instanceof Map)) |
3360 |
< |
return false; |
3361 |
< |
Map<?,?> m = (Map<?,?>) o; |
3362 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3363 |
< |
V val; |
3364 |
< |
while ((val = it.advance()) != null) { |
2909 |
< |
Object v = m.get(it.nextKey); |
2910 |
< |
if (v == null || (v != val && !v.equals(val))) |
2911 |
< |
return false; |
2912 |
< |
} |
2913 |
< |
for (Map.Entry<?,?> e : m.entrySet()) { |
2914 |
< |
Object mk, mv, v; |
2915 |
< |
if ((mk = e.getKey()) == null || |
2916 |
< |
(mv = e.getValue()) == null || |
2917 |
< |
(v = internalGet(mk)) == null || |
2918 |
< |
(mv != v && !mv.equals(v))) |
2919 |
< |
return false; |
2920 |
< |
} |
3357 |
> |
static class BaseIterator<K,V> extends Traverser<K,V> { |
3358 |
> |
final ConcurrentHashMap<K,V> map; |
3359 |
> |
Node<K,V> lastReturned; |
3360 |
> |
BaseIterator(Node<K,V>[] tab, int size, int index, int limit, |
3361 |
> |
ConcurrentHashMap<K,V> map) { |
3362 |
> |
super(tab, size, index, limit); |
3363 |
> |
this.map = map; |
3364 |
> |
advance(); |
3365 |
|
} |
2922 |
– |
return true; |
2923 |
– |
} |
3366 |
|
|
3367 |
< |
/* ----------------Iterators -------------- */ |
3367 |
> |
public final boolean hasNext() { return next != null; } |
3368 |
> |
public final boolean hasMoreElements() { return next != null; } |
3369 |
|
|
3370 |
< |
@SuppressWarnings("serial") static final class KeyIterator<K,V> |
3371 |
< |
extends Traverser<K,V,Object> |
3372 |
< |
implements Spliterator<K>, Iterator<K>, Enumeration<K> { |
3373 |
< |
KeyIterator(ConcurrentHashMap<K,V> map) { super(map); } |
3374 |
< |
KeyIterator(ConcurrentHashMap<K,V> map, Traverser<K,V,Object> it) { |
3375 |
< |
super(map, it); |
2933 |
< |
} |
2934 |
< |
public KeyIterator<K,V> trySplit() { |
2935 |
< |
if (tab != null && baseIndex == baseLimit) |
2936 |
< |
return null; |
2937 |
< |
return new KeyIterator<K,V>(map, this); |
3370 |
> |
public final void remove() { |
3371 |
> |
Node<K,V> p; |
3372 |
> |
if ((p = lastReturned) == null) |
3373 |
> |
throw new IllegalStateException(); |
3374 |
> |
lastReturned = null; |
3375 |
> |
map.replaceNode(p.key, null, null); |
3376 |
|
} |
3377 |
+ |
} |
3378 |
+ |
|
3379 |
+ |
static final class KeyIterator<K,V> extends BaseIterator<K,V> |
3380 |
+ |
implements Iterator<K>, Enumeration<K> { |
3381 |
+ |
KeyIterator(Node<K,V>[] tab, int index, int size, int limit, |
3382 |
+ |
ConcurrentHashMap<K,V> map) { |
3383 |
+ |
super(tab, index, size, limit, map); |
3384 |
+ |
} |
3385 |
+ |
|
3386 |
|
public final K next() { |
3387 |
< |
if (nextVal == null && advance() == null) |
3387 |
> |
Node<K,V> p; |
3388 |
> |
if ((p = next) == null) |
3389 |
|
throw new NoSuchElementException(); |
3390 |
< |
K k = nextKey; |
3391 |
< |
nextVal = null; |
3390 |
> |
K k = p.key; |
3391 |
> |
lastReturned = p; |
3392 |
> |
advance(); |
3393 |
|
return k; |
3394 |
|
} |
3395 |
|
|
3396 |
|
public final K nextElement() { return next(); } |
2948 |
– |
|
2949 |
– |
public Iterator<K> iterator() { return this; } |
2950 |
– |
|
2951 |
– |
public void forEach(Consumer<? super K> action) { |
2952 |
– |
if (action == null) throw new NullPointerException(); |
2953 |
– |
while (advance() != null) |
2954 |
– |
action.accept(nextKey); |
2955 |
– |
} |
2956 |
– |
|
2957 |
– |
public boolean tryAdvance(Consumer<? super K> block) { |
2958 |
– |
if (block == null) throw new NullPointerException(); |
2959 |
– |
if (advance() == null) |
2960 |
– |
return false; |
2961 |
– |
block.accept(nextKey); |
2962 |
– |
return true; |
2963 |
– |
} |
2964 |
– |
|
2965 |
– |
public int characteristics() { |
2966 |
– |
return Spliterator.DISTINCT | Spliterator.CONCURRENT | |
2967 |
– |
Spliterator.NONNULL; |
2968 |
– |
} |
2969 |
– |
|
3397 |
|
} |
3398 |
|
|
3399 |
< |
@SuppressWarnings("serial") static final class ValueIterator<K,V> |
3400 |
< |
extends Traverser<K,V,Object> |
3401 |
< |
implements Spliterator<V>, Iterator<V>, Enumeration<V> { |
3402 |
< |
ValueIterator(ConcurrentHashMap<K,V> map) { super(map); } |
3403 |
< |
ValueIterator(ConcurrentHashMap<K,V> map, Traverser<K,V,Object> it) { |
2977 |
< |
super(map, it); |
2978 |
< |
} |
2979 |
< |
public ValueIterator<K,V> trySplit() { |
2980 |
< |
if (tab != null && baseIndex == baseLimit) |
2981 |
< |
return null; |
2982 |
< |
return new ValueIterator<K,V>(map, this); |
3399 |
> |
static final class ValueIterator<K,V> extends BaseIterator<K,V> |
3400 |
> |
implements Iterator<V>, Enumeration<V> { |
3401 |
> |
ValueIterator(Node<K,V>[] tab, int index, int size, int limit, |
3402 |
> |
ConcurrentHashMap<K,V> map) { |
3403 |
> |
super(tab, index, size, limit, map); |
3404 |
|
} |
3405 |
|
|
3406 |
|
public final V next() { |
3407 |
< |
V v; |
3408 |
< |
if ((v = nextVal) == null && (v = advance()) == null) |
3407 |
> |
Node<K,V> p; |
3408 |
> |
if ((p = next) == null) |
3409 |
|
throw new NoSuchElementException(); |
3410 |
< |
nextVal = null; |
3410 |
> |
V v = p.val; |
3411 |
> |
lastReturned = p; |
3412 |
> |
advance(); |
3413 |
|
return v; |
3414 |
|
} |
3415 |
|
|
3416 |
|
public final V nextElement() { return next(); } |
2994 |
– |
|
2995 |
– |
public Iterator<V> iterator() { return this; } |
2996 |
– |
|
2997 |
– |
public void forEach(Consumer<? super V> action) { |
2998 |
– |
if (action == null) throw new NullPointerException(); |
2999 |
– |
V v; |
3000 |
– |
while ((v = advance()) != null) |
3001 |
– |
action.accept(v); |
3002 |
– |
} |
3003 |
– |
|
3004 |
– |
public boolean tryAdvance(Consumer<? super V> block) { |
3005 |
– |
V v; |
3006 |
– |
if (block == null) throw new NullPointerException(); |
3007 |
– |
if ((v = advance()) == null) |
3008 |
– |
return false; |
3009 |
– |
block.accept(v); |
3010 |
– |
return true; |
3011 |
– |
} |
3012 |
– |
|
3013 |
– |
public int characteristics() { |
3014 |
– |
return Spliterator.CONCURRENT | Spliterator.NONNULL; |
3015 |
– |
} |
3417 |
|
} |
3418 |
|
|
3419 |
< |
@SuppressWarnings("serial") static final class EntryIterator<K,V> |
3420 |
< |
extends Traverser<K,V,Object> |
3421 |
< |
implements Spliterator<Map.Entry<K,V>>, Iterator<Map.Entry<K,V>> { |
3422 |
< |
EntryIterator(ConcurrentHashMap<K,V> map) { super(map); } |
3423 |
< |
EntryIterator(ConcurrentHashMap<K,V> map, Traverser<K,V,Object> it) { |
3023 |
< |
super(map, it); |
3024 |
< |
} |
3025 |
< |
public EntryIterator<K,V> trySplit() { |
3026 |
< |
if (tab != null && baseIndex == baseLimit) |
3027 |
< |
return null; |
3028 |
< |
return new EntryIterator<K,V>(map, this); |
3419 |
> |
static final class EntryIterator<K,V> extends BaseIterator<K,V> |
3420 |
> |
implements Iterator<Map.Entry<K,V>> { |
3421 |
> |
EntryIterator(Node<K,V>[] tab, int index, int size, int limit, |
3422 |
> |
ConcurrentHashMap<K,V> map) { |
3423 |
> |
super(tab, index, size, limit, map); |
3424 |
|
} |
3425 |
|
|
3426 |
|
public final Map.Entry<K,V> next() { |
3427 |
< |
V v; |
3428 |
< |
if ((v = nextVal) == null && (v = advance()) == null) |
3427 |
> |
Node<K,V> p; |
3428 |
> |
if ((p = next) == null) |
3429 |
|
throw new NoSuchElementException(); |
3430 |
< |
K k = nextKey; |
3431 |
< |
nextVal = null; |
3430 |
> |
K k = p.key; |
3431 |
> |
V v = p.val; |
3432 |
> |
lastReturned = p; |
3433 |
> |
advance(); |
3434 |
|
return new MapEntry<K,V>(k, v, map); |
3435 |
|
} |
3039 |
– |
|
3040 |
– |
public Iterator<Map.Entry<K,V>> iterator() { return this; } |
3041 |
– |
|
3042 |
– |
public void forEach(Consumer<? super Map.Entry<K,V>> action) { |
3043 |
– |
if (action == null) throw new NullPointerException(); |
3044 |
– |
V v; |
3045 |
– |
while ((v = advance()) != null) |
3046 |
– |
action.accept(entryFor(nextKey, v)); |
3047 |
– |
} |
3048 |
– |
|
3049 |
– |
public boolean tryAdvance(Consumer<? super Map.Entry<K,V>> block) { |
3050 |
– |
V v; |
3051 |
– |
if (block == null) throw new NullPointerException(); |
3052 |
– |
if ((v = advance()) == null) |
3053 |
– |
return false; |
3054 |
– |
block.accept(entryFor(nextKey, v)); |
3055 |
– |
return true; |
3056 |
– |
} |
3057 |
– |
|
3058 |
– |
public int characteristics() { |
3059 |
– |
return Spliterator.DISTINCT | Spliterator.CONCURRENT | |
3060 |
– |
Spliterator.NONNULL; |
3061 |
– |
} |
3436 |
|
} |
3437 |
|
|
3438 |
|
/** |
3439 |
< |
* Exported Entry for iterators |
3439 |
> |
* Exported Entry for EntryIterator |
3440 |
|
*/ |
3441 |
|
static final class MapEntry<K,V> implements Map.Entry<K,V> { |
3442 |
|
final K key; // non-null |
3447 |
|
this.val = val; |
3448 |
|
this.map = map; |
3449 |
|
} |
3450 |
< |
public final K getKey() { return key; } |
3451 |
< |
public final V getValue() { return val; } |
3452 |
< |
public final int hashCode() { return key.hashCode() ^ val.hashCode(); } |
3453 |
< |
public final String toString(){ return key + "=" + val; } |
3450 |
> |
public K getKey() { return key; } |
3451 |
> |
public V getValue() { return val; } |
3452 |
> |
public int hashCode() { return key.hashCode() ^ val.hashCode(); } |
3453 |
> |
public String toString() { return key + "=" + val; } |
3454 |
|
|
3455 |
< |
public final boolean equals(Object o) { |
3455 |
> |
public boolean equals(Object o) { |
3456 |
|
Object k, v; Map.Entry<?,?> e; |
3457 |
|
return ((o instanceof Map.Entry) && |
3458 |
|
(k = (e = (Map.Entry<?,?>)o).getKey()) != null && |
3466 |
|
* value to return is somewhat arbitrary here. Since we do not |
3467 |
|
* necessarily track asynchronous changes, the most recent |
3468 |
|
* "previous" value could be different from what we return (or |
3469 |
< |
* could even have been removed in which case the put will |
3469 |
> |
* could even have been removed, in which case the put will |
3470 |
|
* re-establish). We do not and cannot guarantee more. |
3471 |
|
*/ |
3472 |
< |
public final V setValue(V value) { |
3472 |
> |
public V setValue(V value) { |
3473 |
|
if (value == null) throw new NullPointerException(); |
3474 |
|
V v = val; |
3475 |
|
val = value; |
3478 |
|
} |
3479 |
|
} |
3480 |
|
|
3481 |
< |
/** |
3482 |
< |
* Returns exportable snapshot entry for the given key and value |
3483 |
< |
* when write-through can't or shouldn't be used. |
3484 |
< |
*/ |
3485 |
< |
static <K,V> AbstractMap.SimpleEntry<K,V> entryFor(K k, V v) { |
3486 |
< |
return new AbstractMap.SimpleEntry<K,V>(k, v); |
3487 |
< |
} |
3481 |
> |
static final class KeySpliterator<K,V> extends Traverser<K,V> |
3482 |
> |
implements Spliterator<K> { |
3483 |
> |
long est; // size estimate |
3484 |
> |
KeySpliterator(Node<K,V>[] tab, int size, int index, int limit, |
3485 |
> |
long est) { |
3486 |
> |
super(tab, size, index, limit); |
3487 |
> |
this.est = est; |
3488 |
> |
} |
3489 |
> |
|
3490 |
> |
public Spliterator<K> trySplit() { |
3491 |
> |
int i, f, h; |
3492 |
> |
return (h = ((i = baseIndex) + (f = baseLimit)) >>> 1) <= i ? null : |
3493 |
> |
new KeySpliterator<K,V>(tab, baseSize, baseLimit = h, |
3494 |
> |
f, est >>>= 1); |
3495 |
> |
} |
3496 |
|
|
3497 |
< |
/* ---------------- Serialization Support -------------- */ |
3497 |
> |
public void forEachRemaining(Consumer<? super K> action) { |
3498 |
> |
if (action == null) throw new NullPointerException(); |
3499 |
> |
for (Node<K,V> p; (p = advance()) != null;) |
3500 |
> |
action.accept(p.key); |
3501 |
> |
} |
3502 |
|
|
3503 |
< |
/** |
3504 |
< |
* Stripped-down version of helper class used in previous version, |
3505 |
< |
* declared for the sake of serialization compatibility |
3506 |
< |
*/ |
3507 |
< |
static class Segment<K,V> implements Serializable { |
3508 |
< |
private static final long serialVersionUID = 2249069246763182397L; |
3509 |
< |
final float loadFactor; |
3510 |
< |
Segment(float lf) { this.loadFactor = lf; } |
3503 |
> |
public boolean tryAdvance(Consumer<? super K> action) { |
3504 |
> |
if (action == null) throw new NullPointerException(); |
3505 |
> |
Node<K,V> p; |
3506 |
> |
if ((p = advance()) == null) |
3507 |
> |
return false; |
3508 |
> |
action.accept(p.key); |
3509 |
> |
return true; |
3510 |
> |
} |
3511 |
> |
|
3512 |
> |
public long estimateSize() { return est; } |
3513 |
> |
|
3514 |
> |
public int characteristics() { |
3515 |
> |
return Spliterator.DISTINCT | Spliterator.CONCURRENT | |
3516 |
> |
Spliterator.NONNULL; |
3517 |
> |
} |
3518 |
|
} |
3519 |
|
|
3520 |
< |
/** |
3521 |
< |
* Saves the state of the {@code ConcurrentHashMap} instance to a |
3522 |
< |
* stream (i.e., serializes it). |
3523 |
< |
* @param s the stream |
3524 |
< |
* @serialData |
3525 |
< |
* the key (Object) and value (Object) |
3526 |
< |
* for each key-value mapping, followed by a null pair. |
3527 |
< |
* The key-value mappings are emitted in no particular order. |
3528 |
< |
*/ |
3529 |
< |
@SuppressWarnings("unchecked") private void writeObject |
3530 |
< |
(java.io.ObjectOutputStream s) |
3531 |
< |
throws java.io.IOException { |
3532 |
< |
if (segments == null) { // for serialization compatibility |
3533 |
< |
segments = (Segment<K,V>[]) |
3141 |
< |
new Segment<?,?>[DEFAULT_CONCURRENCY_LEVEL]; |
3142 |
< |
for (int i = 0; i < segments.length; ++i) |
3143 |
< |
segments[i] = new Segment<K,V>(LOAD_FACTOR); |
3520 |
> |
static final class ValueSpliterator<K,V> extends Traverser<K,V> |
3521 |
> |
implements Spliterator<V> { |
3522 |
> |
long est; // size estimate |
3523 |
> |
ValueSpliterator(Node<K,V>[] tab, int size, int index, int limit, |
3524 |
> |
long est) { |
3525 |
> |
super(tab, size, index, limit); |
3526 |
> |
this.est = est; |
3527 |
> |
} |
3528 |
> |
|
3529 |
> |
public Spliterator<V> trySplit() { |
3530 |
> |
int i, f, h; |
3531 |
> |
return (h = ((i = baseIndex) + (f = baseLimit)) >>> 1) <= i ? null : |
3532 |
> |
new ValueSpliterator<K,V>(tab, baseSize, baseLimit = h, |
3533 |
> |
f, est >>>= 1); |
3534 |
|
} |
3535 |
< |
s.defaultWriteObject(); |
3536 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3537 |
< |
V v; |
3538 |
< |
while ((v = it.advance()) != null) { |
3539 |
< |
s.writeObject(it.nextKey); |
3540 |
< |
s.writeObject(v); |
3535 |
> |
|
3536 |
> |
public void forEachRemaining(Consumer<? super V> action) { |
3537 |
> |
if (action == null) throw new NullPointerException(); |
3538 |
> |
for (Node<K,V> p; (p = advance()) != null;) |
3539 |
> |
action.accept(p.val); |
3540 |
> |
} |
3541 |
> |
|
3542 |
> |
public boolean tryAdvance(Consumer<? super V> action) { |
3543 |
> |
if (action == null) throw new NullPointerException(); |
3544 |
> |
Node<K,V> p; |
3545 |
> |
if ((p = advance()) == null) |
3546 |
> |
return false; |
3547 |
> |
action.accept(p.val); |
3548 |
> |
return true; |
3549 |
> |
} |
3550 |
> |
|
3551 |
> |
public long estimateSize() { return est; } |
3552 |
> |
|
3553 |
> |
public int characteristics() { |
3554 |
> |
return Spliterator.CONCURRENT | Spliterator.NONNULL; |
3555 |
|
} |
3152 |
– |
s.writeObject(null); |
3153 |
– |
s.writeObject(null); |
3154 |
– |
segments = null; // throw away |
3556 |
|
} |
3557 |
|
|
3558 |
< |
/** |
3559 |
< |
* Reconstitutes the instance from a stream (that is, deserializes it). |
3560 |
< |
* @param s the stream |
3561 |
< |
*/ |
3562 |
< |
@SuppressWarnings("unchecked") private void readObject |
3563 |
< |
(java.io.ObjectInputStream s) |
3564 |
< |
throws java.io.IOException, ClassNotFoundException { |
3565 |
< |
s.defaultReadObject(); |
3566 |
< |
this.segments = null; // unneeded |
3558 |
> |
static final class EntrySpliterator<K,V> extends Traverser<K,V> |
3559 |
> |
implements Spliterator<Map.Entry<K,V>> { |
3560 |
> |
final ConcurrentHashMap<K,V> map; // To export MapEntry |
3561 |
> |
long est; // size estimate |
3562 |
> |
EntrySpliterator(Node<K,V>[] tab, int size, int index, int limit, |
3563 |
> |
long est, ConcurrentHashMap<K,V> map) { |
3564 |
> |
super(tab, size, index, limit); |
3565 |
> |
this.map = map; |
3566 |
> |
this.est = est; |
3567 |
> |
} |
3568 |
|
|
3569 |
< |
// Create all nodes, then place in table once size is known |
3570 |
< |
long size = 0L; |
3571 |
< |
Node<V> p = null; |
3572 |
< |
for (;;) { |
3573 |
< |
K k = (K) s.readObject(); |
3172 |
< |
V v = (V) s.readObject(); |
3173 |
< |
if (k != null && v != null) { |
3174 |
< |
int h = spread(k.hashCode()); |
3175 |
< |
p = new Node<V>(h, k, v, p); |
3176 |
< |
++size; |
3177 |
< |
} |
3178 |
< |
else |
3179 |
< |
break; |
3569 |
> |
public Spliterator<Map.Entry<K,V>> trySplit() { |
3570 |
> |
int i, f, h; |
3571 |
> |
return (h = ((i = baseIndex) + (f = baseLimit)) >>> 1) <= i ? null : |
3572 |
> |
new EntrySpliterator<K,V>(tab, baseSize, baseLimit = h, |
3573 |
> |
f, est >>>= 1, map); |
3574 |
|
} |
3575 |
< |
if (p != null) { |
3576 |
< |
boolean init = false; |
3577 |
< |
int n; |
3578 |
< |
if (size >= (long)(MAXIMUM_CAPACITY >>> 1)) |
3579 |
< |
n = MAXIMUM_CAPACITY; |
3580 |
< |
else { |
3581 |
< |
int sz = (int)size; |
3582 |
< |
n = tableSizeFor(sz + (sz >>> 1) + 1); |
3583 |
< |
} |
3584 |
< |
int sc = sizeCtl; |
3585 |
< |
boolean collide = false; |
3586 |
< |
if (n > sc && |
3587 |
< |
U.compareAndSwapInt(this, SIZECTL, sc, -1)) { |
3588 |
< |
try { |
3589 |
< |
if (table == null) { |
3590 |
< |
init = true; |
3591 |
< |
@SuppressWarnings("rawtypes") Node[] rt = new Node[n]; |
3592 |
< |
Node<V>[] tab = (Node<V>[])rt; |
3593 |
< |
int mask = n - 1; |
3594 |
< |
while (p != null) { |
3595 |
< |
int j = p.hash & mask; |
3202 |
< |
Node<V> next = p.next; |
3203 |
< |
Node<V> q = p.next = tabAt(tab, j); |
3204 |
< |
setTabAt(tab, j, p); |
3205 |
< |
if (!collide && q != null && q.hash == p.hash) |
3206 |
< |
collide = true; |
3207 |
< |
p = next; |
3208 |
< |
} |
3209 |
< |
table = tab; |
3210 |
< |
addCount(size, -1); |
3211 |
< |
sc = n - (n >>> 2); |
3212 |
< |
} |
3213 |
< |
} finally { |
3214 |
< |
sizeCtl = sc; |
3215 |
< |
} |
3216 |
< |
if (collide) { // rescan and convert to TreeBins |
3217 |
< |
Node<V>[] tab = table; |
3218 |
< |
for (int i = 0; i < tab.length; ++i) { |
3219 |
< |
int c = 0; |
3220 |
< |
for (Node<V> e = tabAt(tab, i); e != null; e = e.next) { |
3221 |
< |
if (++c > TREE_THRESHOLD && |
3222 |
< |
(e.key instanceof Comparable)) { |
3223 |
< |
replaceWithTreeBin(tab, i, e.key); |
3224 |
< |
break; |
3225 |
< |
} |
3226 |
< |
} |
3227 |
< |
} |
3228 |
< |
} |
3229 |
< |
} |
3230 |
< |
if (!init) { // Can only happen if unsafely published. |
3231 |
< |
while (p != null) { |
3232 |
< |
internalPut((K)p.key, p.val, false); |
3233 |
< |
p = p.next; |
3234 |
< |
} |
3235 |
< |
} |
3575 |
> |
|
3576 |
> |
public void forEachRemaining(Consumer<? super Map.Entry<K,V>> action) { |
3577 |
> |
if (action == null) throw new NullPointerException(); |
3578 |
> |
for (Node<K,V> p; (p = advance()) != null; ) |
3579 |
> |
action.accept(new MapEntry<K,V>(p.key, p.val, map)); |
3580 |
> |
} |
3581 |
> |
|
3582 |
> |
public boolean tryAdvance(Consumer<? super Map.Entry<K,V>> action) { |
3583 |
> |
if (action == null) throw new NullPointerException(); |
3584 |
> |
Node<K,V> p; |
3585 |
> |
if ((p = advance()) == null) |
3586 |
> |
return false; |
3587 |
> |
action.accept(new MapEntry<K,V>(p.key, p.val, map)); |
3588 |
> |
return true; |
3589 |
> |
} |
3590 |
> |
|
3591 |
> |
public long estimateSize() { return est; } |
3592 |
> |
|
3593 |
> |
public int characteristics() { |
3594 |
> |
return Spliterator.DISTINCT | Spliterator.CONCURRENT | |
3595 |
> |
Spliterator.NONNULL; |
3596 |
|
} |
3597 |
|
} |
3598 |
|
|
3599 |
< |
// ------------------------------------------------------- |
3599 |
> |
// Parallel bulk operations |
3600 |
|
|
3601 |
< |
// Sequential bulk operations |
3601 |
> |
/** |
3602 |
> |
* Computes initial batch value for bulk tasks. The returned value |
3603 |
> |
* is approximately exp2 of the number of times (minus one) to |
3604 |
> |
* split task by two before executing leaf action. This value is |
3605 |
> |
* faster to compute and more convenient to use as a guide to |
3606 |
> |
* splitting than is the depth, since it is used while dividing by |
3607 |
> |
* two anyway. |
3608 |
> |
*/ |
3609 |
> |
final int batchFor(long b) { |
3610 |
> |
long n; |
3611 |
> |
if (b == Long.MAX_VALUE || (n = sumCount()) <= 1L || n < b) |
3612 |
> |
return 0; |
3613 |
> |
int sp = ForkJoinPool.getCommonPoolParallelism() << 2; // slack of 4 |
3614 |
> |
return (b <= 0L || (n /= b) >= sp) ? sp : (int)n; |
3615 |
> |
} |
3616 |
|
|
3617 |
|
/** |
3618 |
|
* Performs the given action for each (key, value). |
3619 |
|
* |
3620 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
3621 |
+ |
* needed for this operation to be executed in parallel |
3622 |
|
* @param action the action |
3623 |
+ |
* @since 1.8 |
3624 |
|
*/ |
3625 |
< |
public void forEachSequentially |
3626 |
< |
(BiConsumer<? super K, ? super V> action) { |
3625 |
> |
public void forEach(long parallelismThreshold, |
3626 |
> |
BiConsumer<? super K,? super V> action) { |
3627 |
|
if (action == null) throw new NullPointerException(); |
3628 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3629 |
< |
V v; |
3630 |
< |
while ((v = it.advance()) != null) |
3254 |
< |
action.accept(it.nextKey, v); |
3628 |
> |
new ForEachMappingTask<K,V> |
3629 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
3630 |
> |
action).invoke(); |
3631 |
|
} |
3632 |
|
|
3633 |
|
/** |
3634 |
|
* Performs the given action for each non-null transformation |
3635 |
|
* of each (key, value). |
3636 |
|
* |
3637 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
3638 |
+ |
* needed for this operation to be executed in parallel |
3639 |
|
* @param transformer a function returning the transformation |
3640 |
|
* for an element, or null if there is no transformation (in |
3641 |
|
* which case the action is not applied) |
3642 |
|
* @param action the action |
3643 |
+ |
* @param <U> the return type of the transformer |
3644 |
+ |
* @since 1.8 |
3645 |
|
*/ |
3646 |
< |
public <U> void forEachSequentially |
3647 |
< |
(BiFunction<? super K, ? super V, ? extends U> transformer, |
3648 |
< |
Consumer<? super U> action) { |
3646 |
> |
public <U> void forEach(long parallelismThreshold, |
3647 |
> |
BiFunction<? super K, ? super V, ? extends U> transformer, |
3648 |
> |
Consumer<? super U> action) { |
3649 |
|
if (transformer == null || action == null) |
3650 |
|
throw new NullPointerException(); |
3651 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3652 |
< |
V v; U u; |
3653 |
< |
while ((v = it.advance()) != null) { |
3274 |
< |
if ((u = transformer.apply(it.nextKey, v)) != null) |
3275 |
< |
action.accept(u); |
3276 |
< |
} |
3651 |
> |
new ForEachTransformedMappingTask<K,V,U> |
3652 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
3653 |
> |
transformer, action).invoke(); |
3654 |
|
} |
3655 |
|
|
3656 |
|
/** |
3657 |
|
* Returns a non-null result from applying the given search |
3658 |
< |
* function on each (key, value), or null if none. |
3658 |
> |
* function on each (key, value), or null if none. Upon |
3659 |
> |
* success, further element processing is suppressed and the |
3660 |
> |
* results of any other parallel invocations of the search |
3661 |
> |
* function are ignored. |
3662 |
|
* |
3663 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
3664 |
+ |
* needed for this operation to be executed in parallel |
3665 |
|
* @param searchFunction a function returning a non-null |
3666 |
|
* result on success, else null |
3667 |
+ |
* @param <U> the return type of the search function |
3668 |
|
* @return a non-null result from applying the given search |
3669 |
|
* function on each (key, value), or null if none |
3670 |
+ |
* @since 1.8 |
3671 |
|
*/ |
3672 |
< |
public <U> U searchSequentially |
3673 |
< |
(BiFunction<? super K, ? super V, ? extends U> searchFunction) { |
3672 |
> |
public <U> U search(long parallelismThreshold, |
3673 |
> |
BiFunction<? super K, ? super V, ? extends U> searchFunction) { |
3674 |
|
if (searchFunction == null) throw new NullPointerException(); |
3675 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3676 |
< |
V v; U u; |
3677 |
< |
while ((v = it.advance()) != null) { |
3294 |
< |
if ((u = searchFunction.apply(it.nextKey, v)) != null) |
3295 |
< |
return u; |
3296 |
< |
} |
3297 |
< |
return null; |
3675 |
> |
return new SearchMappingsTask<K,V,U> |
3676 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
3677 |
> |
searchFunction, new AtomicReference<U>()).invoke(); |
3678 |
|
} |
3679 |
|
|
3680 |
|
/** |
3682 |
|
* of all (key, value) pairs using the given reducer to |
3683 |
|
* combine values, or null if none. |
3684 |
|
* |
3685 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
3686 |
+ |
* needed for this operation to be executed in parallel |
3687 |
|
* @param transformer a function returning the transformation |
3688 |
|
* for an element, or null if there is no transformation (in |
3689 |
|
* which case it is not combined) |
3690 |
|
* @param reducer a commutative associative combining function |
3691 |
+ |
* @param <U> the return type of the transformer |
3692 |
|
* @return the result of accumulating the given transformation |
3693 |
|
* of all (key, value) pairs |
3694 |
+ |
* @since 1.8 |
3695 |
|
*/ |
3696 |
< |
public <U> U reduceSequentially |
3697 |
< |
(BiFunction<? super K, ? super V, ? extends U> transformer, |
3698 |
< |
BiFunction<? super U, ? super U, ? extends U> reducer) { |
3696 |
> |
public <U> U reduce(long parallelismThreshold, |
3697 |
> |
BiFunction<? super K, ? super V, ? extends U> transformer, |
3698 |
> |
BiFunction<? super U, ? super U, ? extends U> reducer) { |
3699 |
|
if (transformer == null || reducer == null) |
3700 |
|
throw new NullPointerException(); |
3701 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3702 |
< |
U r = null, u; V v; |
3703 |
< |
while ((v = it.advance()) != null) { |
3320 |
< |
if ((u = transformer.apply(it.nextKey, v)) != null) |
3321 |
< |
r = (r == null) ? u : reducer.apply(r, u); |
3322 |
< |
} |
3323 |
< |
return r; |
3701 |
> |
return new MapReduceMappingsTask<K,V,U> |
3702 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
3703 |
> |
null, transformer, reducer).invoke(); |
3704 |
|
} |
3705 |
|
|
3706 |
|
/** |
3708 |
|
* of all (key, value) pairs using the given reducer to |
3709 |
|
* combine values, and the given basis as an identity value. |
3710 |
|
* |
3711 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
3712 |
+ |
* needed for this operation to be executed in parallel |
3713 |
|
* @param transformer a function returning the transformation |
3714 |
|
* for an element |
3715 |
|
* @param basis the identity (initial default value) for the reduction |
3716 |
|
* @param reducer a commutative associative combining function |
3717 |
|
* @return the result of accumulating the given transformation |
3718 |
|
* of all (key, value) pairs |
3719 |
+ |
* @since 1.8 |
3720 |
|
*/ |
3721 |
< |
public double reduceToDoubleSequentially |
3722 |
< |
(ToDoubleBiFunction<? super K, ? super V> transformer, |
3723 |
< |
double basis, |
3724 |
< |
DoubleBinaryOperator reducer) { |
3721 |
> |
public double reduceToDouble(long parallelismThreshold, |
3722 |
> |
ToDoubleBiFunction<? super K, ? super V> transformer, |
3723 |
> |
double basis, |
3724 |
> |
DoubleBinaryOperator reducer) { |
3725 |
|
if (transformer == null || reducer == null) |
3726 |
|
throw new NullPointerException(); |
3727 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3728 |
< |
double r = basis; V v; |
3729 |
< |
while ((v = it.advance()) != null) |
3347 |
< |
r = reducer.applyAsDouble(r, transformer.applyAsDouble(it.nextKey, v)); |
3348 |
< |
return r; |
3727 |
> |
return new MapReduceMappingsToDoubleTask<K,V> |
3728 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
3729 |
> |
null, transformer, basis, reducer).invoke(); |
3730 |
|
} |
3731 |
|
|
3732 |
|
/** |
3734 |
|
* of all (key, value) pairs using the given reducer to |
3735 |
|
* combine values, and the given basis as an identity value. |
3736 |
|
* |
3737 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
3738 |
+ |
* needed for this operation to be executed in parallel |
3739 |
|
* @param transformer a function returning the transformation |
3740 |
|
* for an element |
3741 |
|
* @param basis the identity (initial default value) for the reduction |
3742 |
|
* @param reducer a commutative associative combining function |
3743 |
|
* @return the result of accumulating the given transformation |
3744 |
|
* of all (key, value) pairs |
3745 |
+ |
* @since 1.8 |
3746 |
|
*/ |
3747 |
< |
public long reduceToLongSequentially |
3748 |
< |
(ToLongBiFunction<? super K, ? super V> transformer, |
3749 |
< |
long basis, |
3750 |
< |
LongBinaryOperator reducer) { |
3747 |
> |
public long reduceToLong(long parallelismThreshold, |
3748 |
> |
ToLongBiFunction<? super K, ? super V> transformer, |
3749 |
> |
long basis, |
3750 |
> |
LongBinaryOperator reducer) { |
3751 |
|
if (transformer == null || reducer == null) |
3752 |
|
throw new NullPointerException(); |
3753 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3754 |
< |
long r = basis; V v; |
3755 |
< |
while ((v = it.advance()) != null) |
3372 |
< |
r = reducer.applyAsLong(r, transformer.applyAsLong(it.nextKey, v)); |
3373 |
< |
return r; |
3753 |
> |
return new MapReduceMappingsToLongTask<K,V> |
3754 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
3755 |
> |
null, transformer, basis, reducer).invoke(); |
3756 |
|
} |
3757 |
|
|
3758 |
|
/** |
3760 |
|
* of all (key, value) pairs using the given reducer to |
3761 |
|
* combine values, and the given basis as an identity value. |
3762 |
|
* |
3763 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
3764 |
+ |
* needed for this operation to be executed in parallel |
3765 |
|
* @param transformer a function returning the transformation |
3766 |
|
* for an element |
3767 |
|
* @param basis the identity (initial default value) for the reduction |
3768 |
|
* @param reducer a commutative associative combining function |
3769 |
|
* @return the result of accumulating the given transformation |
3770 |
|
* of all (key, value) pairs |
3771 |
+ |
* @since 1.8 |
3772 |
|
*/ |
3773 |
< |
public int reduceToIntSequentially |
3774 |
< |
(ToIntBiFunction<? super K, ? super V> transformer, |
3775 |
< |
int basis, |
3776 |
< |
IntBinaryOperator reducer) { |
3773 |
> |
public int reduceToInt(long parallelismThreshold, |
3774 |
> |
ToIntBiFunction<? super K, ? super V> transformer, |
3775 |
> |
int basis, |
3776 |
> |
IntBinaryOperator reducer) { |
3777 |
|
if (transformer == null || reducer == null) |
3778 |
|
throw new NullPointerException(); |
3779 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3780 |
< |
int r = basis; V v; |
3781 |
< |
while ((v = it.advance()) != null) |
3397 |
< |
r = reducer.applyAsInt(r, transformer.applyAsInt(it.nextKey, v)); |
3398 |
< |
return r; |
3779 |
> |
return new MapReduceMappingsToIntTask<K,V> |
3780 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
3781 |
> |
null, transformer, basis, reducer).invoke(); |
3782 |
|
} |
3783 |
|
|
3784 |
|
/** |
3785 |
|
* Performs the given action for each key. |
3786 |
|
* |
3787 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
3788 |
+ |
* needed for this operation to be executed in parallel |
3789 |
|
* @param action the action |
3790 |
+ |
* @since 1.8 |
3791 |
|
*/ |
3792 |
< |
public void forEachKeySequentially |
3793 |
< |
(Consumer<? super K> action) { |
3792 |
> |
public void forEachKey(long parallelismThreshold, |
3793 |
> |
Consumer<? super K> action) { |
3794 |
|
if (action == null) throw new NullPointerException(); |
3795 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3796 |
< |
while (it.advance() != null) |
3797 |
< |
action.accept(it.nextKey); |
3795 |
> |
new ForEachKeyTask<K,V> |
3796 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
3797 |
> |
action).invoke(); |
3798 |
|
} |
3799 |
|
|
3800 |
|
/** |
3801 |
|
* Performs the given action for each non-null transformation |
3802 |
|
* of each key. |
3803 |
|
* |
3804 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
3805 |
+ |
* needed for this operation to be executed in parallel |
3806 |
|
* @param transformer a function returning the transformation |
3807 |
|
* for an element, or null if there is no transformation (in |
3808 |
|
* which case the action is not applied) |
3809 |
|
* @param action the action |
3810 |
+ |
* @param <U> the return type of the transformer |
3811 |
+ |
* @since 1.8 |
3812 |
|
*/ |
3813 |
< |
public <U> void forEachKeySequentially |
3814 |
< |
(Function<? super K, ? extends U> transformer, |
3815 |
< |
Consumer<? super U> action) { |
3813 |
> |
public <U> void forEachKey(long parallelismThreshold, |
3814 |
> |
Function<? super K, ? extends U> transformer, |
3815 |
> |
Consumer<? super U> action) { |
3816 |
|
if (transformer == null || action == null) |
3817 |
|
throw new NullPointerException(); |
3818 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3819 |
< |
U u; |
3820 |
< |
while (it.advance() != null) { |
3431 |
< |
if ((u = transformer.apply(it.nextKey)) != null) |
3432 |
< |
action.accept(u); |
3433 |
< |
} |
3434 |
< |
ForkJoinTasks.forEachKey |
3435 |
< |
(this, transformer, action).invoke(); |
3818 |
> |
new ForEachTransformedKeyTask<K,V,U> |
3819 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
3820 |
> |
transformer, action).invoke(); |
3821 |
|
} |
3822 |
|
|
3823 |
|
/** |
3824 |
|
* Returns a non-null result from applying the given search |
3825 |
< |
* function on each key, or null if none. |
3825 |
> |
* function on each key, or null if none. Upon success, |
3826 |
> |
* further element processing is suppressed and the results of |
3827 |
> |
* any other parallel invocations of the search function are |
3828 |
> |
* ignored. |
3829 |
|
* |
3830 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
3831 |
+ |
* needed for this operation to be executed in parallel |
3832 |
|
* @param searchFunction a function returning a non-null |
3833 |
|
* result on success, else null |
3834 |
+ |
* @param <U> the return type of the search function |
3835 |
|
* @return a non-null result from applying the given search |
3836 |
|
* function on each key, or null if none |
3837 |
+ |
* @since 1.8 |
3838 |
|
*/ |
3839 |
< |
public <U> U searchKeysSequentially |
3840 |
< |
(Function<? super K, ? extends U> searchFunction) { |
3841 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3842 |
< |
U u; |
3843 |
< |
while (it.advance() != null) { |
3844 |
< |
if ((u = searchFunction.apply(it.nextKey)) != null) |
3453 |
< |
return u; |
3454 |
< |
} |
3455 |
< |
return null; |
3839 |
> |
public <U> U searchKeys(long parallelismThreshold, |
3840 |
> |
Function<? super K, ? extends U> searchFunction) { |
3841 |
> |
if (searchFunction == null) throw new NullPointerException(); |
3842 |
> |
return new SearchKeysTask<K,V,U> |
3843 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
3844 |
> |
searchFunction, new AtomicReference<U>()).invoke(); |
3845 |
|
} |
3846 |
|
|
3847 |
|
/** |
3848 |
|
* Returns the result of accumulating all keys using the given |
3849 |
|
* reducer to combine values, or null if none. |
3850 |
|
* |
3851 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
3852 |
+ |
* needed for this operation to be executed in parallel |
3853 |
|
* @param reducer a commutative associative combining function |
3854 |
|
* @return the result of accumulating all keys using the given |
3855 |
|
* reducer to combine values, or null if none |
3856 |
+ |
* @since 1.8 |
3857 |
|
*/ |
3858 |
< |
public K reduceKeysSequentially |
3859 |
< |
(BiFunction<? super K, ? super K, ? extends K> reducer) { |
3858 |
> |
public K reduceKeys(long parallelismThreshold, |
3859 |
> |
BiFunction<? super K, ? super K, ? extends K> reducer) { |
3860 |
|
if (reducer == null) throw new NullPointerException(); |
3861 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3862 |
< |
K r = null; |
3863 |
< |
while (it.advance() != null) { |
3472 |
< |
K u = it.nextKey; |
3473 |
< |
r = (r == null) ? u : reducer.apply(r, u); |
3474 |
< |
} |
3475 |
< |
return r; |
3861 |
> |
return new ReduceKeysTask<K,V> |
3862 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
3863 |
> |
null, reducer).invoke(); |
3864 |
|
} |
3865 |
|
|
3866 |
|
/** |
3868 |
|
* of all keys using the given reducer to combine values, or |
3869 |
|
* null if none. |
3870 |
|
* |
3871 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
3872 |
+ |
* needed for this operation to be executed in parallel |
3873 |
|
* @param transformer a function returning the transformation |
3874 |
|
* for an element, or null if there is no transformation (in |
3875 |
|
* which case it is not combined) |
3876 |
|
* @param reducer a commutative associative combining function |
3877 |
+ |
* @param <U> the return type of the transformer |
3878 |
|
* @return the result of accumulating the given transformation |
3879 |
|
* of all keys |
3880 |
+ |
* @since 1.8 |
3881 |
|
*/ |
3882 |
< |
public <U> U reduceKeysSequentially |
3883 |
< |
(Function<? super K, ? extends U> transformer, |
3882 |
> |
public <U> U reduceKeys(long parallelismThreshold, |
3883 |
> |
Function<? super K, ? extends U> transformer, |
3884 |
|
BiFunction<? super U, ? super U, ? extends U> reducer) { |
3885 |
|
if (transformer == null || reducer == null) |
3886 |
|
throw new NullPointerException(); |
3887 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3888 |
< |
U r = null, u; |
3889 |
< |
while (it.advance() != null) { |
3498 |
< |
if ((u = transformer.apply(it.nextKey)) != null) |
3499 |
< |
r = (r == null) ? u : reducer.apply(r, u); |
3500 |
< |
} |
3501 |
< |
return r; |
3887 |
> |
return new MapReduceKeysTask<K,V,U> |
3888 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
3889 |
> |
null, transformer, reducer).invoke(); |
3890 |
|
} |
3891 |
|
|
3892 |
|
/** |
3894 |
|
* of all keys using the given reducer to combine values, and |
3895 |
|
* the given basis as an identity value. |
3896 |
|
* |
3897 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
3898 |
+ |
* needed for this operation to be executed in parallel |
3899 |
|
* @param transformer a function returning the transformation |
3900 |
|
* for an element |
3901 |
|
* @param basis the identity (initial default value) for the reduction |
3902 |
|
* @param reducer a commutative associative combining function |
3903 |
|
* @return the result of accumulating the given transformation |
3904 |
|
* of all keys |
3905 |
+ |
* @since 1.8 |
3906 |
|
*/ |
3907 |
< |
public double reduceKeysToDoubleSequentially |
3908 |
< |
(ToDoubleFunction<? super K> transformer, |
3909 |
< |
double basis, |
3910 |
< |
DoubleBinaryOperator reducer) { |
3907 |
> |
public double reduceKeysToDouble(long parallelismThreshold, |
3908 |
> |
ToDoubleFunction<? super K> transformer, |
3909 |
> |
double basis, |
3910 |
> |
DoubleBinaryOperator reducer) { |
3911 |
|
if (transformer == null || reducer == null) |
3912 |
|
throw new NullPointerException(); |
3913 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3914 |
< |
double r = basis; |
3915 |
< |
while (it.advance() != null) |
3525 |
< |
r = reducer.applyAsDouble(r, transformer.applyAsDouble(it.nextKey)); |
3526 |
< |
return r; |
3913 |
> |
return new MapReduceKeysToDoubleTask<K,V> |
3914 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
3915 |
> |
null, transformer, basis, reducer).invoke(); |
3916 |
|
} |
3917 |
|
|
3918 |
|
/** |
3920 |
|
* of all keys using the given reducer to combine values, and |
3921 |
|
* the given basis as an identity value. |
3922 |
|
* |
3923 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
3924 |
+ |
* needed for this operation to be executed in parallel |
3925 |
|
* @param transformer a function returning the transformation |
3926 |
|
* for an element |
3927 |
|
* @param basis the identity (initial default value) for the reduction |
3928 |
|
* @param reducer a commutative associative combining function |
3929 |
|
* @return the result of accumulating the given transformation |
3930 |
|
* of all keys |
3931 |
+ |
* @since 1.8 |
3932 |
|
*/ |
3933 |
< |
public long reduceKeysToLongSequentially |
3934 |
< |
(ToLongFunction<? super K> transformer, |
3935 |
< |
long basis, |
3936 |
< |
LongBinaryOperator reducer) { |
3933 |
> |
public long reduceKeysToLong(long parallelismThreshold, |
3934 |
> |
ToLongFunction<? super K> transformer, |
3935 |
> |
long basis, |
3936 |
> |
LongBinaryOperator reducer) { |
3937 |
|
if (transformer == null || reducer == null) |
3938 |
|
throw new NullPointerException(); |
3939 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3940 |
< |
long r = basis; |
3941 |
< |
while (it.advance() != null) |
3550 |
< |
r = reducer.applyAsLong(r, transformer.applyAsLong(it.nextKey)); |
3551 |
< |
return r; |
3939 |
> |
return new MapReduceKeysToLongTask<K,V> |
3940 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
3941 |
> |
null, transformer, basis, reducer).invoke(); |
3942 |
|
} |
3943 |
|
|
3944 |
|
/** |
3946 |
|
* of all keys using the given reducer to combine values, and |
3947 |
|
* the given basis as an identity value. |
3948 |
|
* |
3949 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
3950 |
+ |
* needed for this operation to be executed in parallel |
3951 |
|
* @param transformer a function returning the transformation |
3952 |
|
* for an element |
3953 |
|
* @param basis the identity (initial default value) for the reduction |
3954 |
|
* @param reducer a commutative associative combining function |
3955 |
|
* @return the result of accumulating the given transformation |
3956 |
|
* of all keys |
3957 |
+ |
* @since 1.8 |
3958 |
|
*/ |
3959 |
< |
public int reduceKeysToIntSequentially |
3960 |
< |
(ToIntFunction<? super K> transformer, |
3961 |
< |
int basis, |
3962 |
< |
IntBinaryOperator reducer) { |
3959 |
> |
public int reduceKeysToInt(long parallelismThreshold, |
3960 |
> |
ToIntFunction<? super K> transformer, |
3961 |
> |
int basis, |
3962 |
> |
IntBinaryOperator reducer) { |
3963 |
|
if (transformer == null || reducer == null) |
3964 |
|
throw new NullPointerException(); |
3965 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3966 |
< |
int r = basis; |
3967 |
< |
while (it.advance() != null) |
3575 |
< |
r = reducer.applyAsInt(r, transformer.applyAsInt(it.nextKey)); |
3576 |
< |
return r; |
3965 |
> |
return new MapReduceKeysToIntTask<K,V> |
3966 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
3967 |
> |
null, transformer, basis, reducer).invoke(); |
3968 |
|
} |
3969 |
|
|
3970 |
|
/** |
3971 |
|
* Performs the given action for each value. |
3972 |
|
* |
3973 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
3974 |
+ |
* needed for this operation to be executed in parallel |
3975 |
|
* @param action the action |
3976 |
+ |
* @since 1.8 |
3977 |
|
*/ |
3978 |
< |
public void forEachValueSequentially(Consumer<? super V> action) { |
3979 |
< |
if (action == null) throw new NullPointerException(); |
3980 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3981 |
< |
V v; |
3982 |
< |
while ((v = it.advance()) != null) |
3983 |
< |
action.accept(v); |
3978 |
> |
public void forEachValue(long parallelismThreshold, |
3979 |
> |
Consumer<? super V> action) { |
3980 |
> |
if (action == null) |
3981 |
> |
throw new NullPointerException(); |
3982 |
> |
new ForEachValueTask<K,V> |
3983 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
3984 |
> |
action).invoke(); |
3985 |
|
} |
3986 |
|
|
3987 |
|
/** |
3988 |
|
* Performs the given action for each non-null transformation |
3989 |
|
* of each value. |
3990 |
|
* |
3991 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
3992 |
+ |
* needed for this operation to be executed in parallel |
3993 |
|
* @param transformer a function returning the transformation |
3994 |
|
* for an element, or null if there is no transformation (in |
3995 |
|
* which case the action is not applied) |
3996 |
|
* @param action the action |
3997 |
+ |
* @param <U> the return type of the transformer |
3998 |
+ |
* @since 1.8 |
3999 |
|
*/ |
4000 |
< |
public <U> void forEachValueSequentially |
4001 |
< |
(Function<? super V, ? extends U> transformer, |
4002 |
< |
Consumer<? super U> action) { |
4000 |
> |
public <U> void forEachValue(long parallelismThreshold, |
4001 |
> |
Function<? super V, ? extends U> transformer, |
4002 |
> |
Consumer<? super U> action) { |
4003 |
|
if (transformer == null || action == null) |
4004 |
|
throw new NullPointerException(); |
4005 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
4006 |
< |
V v; U u; |
4007 |
< |
while ((v = it.advance()) != null) { |
3609 |
< |
if ((u = transformer.apply(v)) != null) |
3610 |
< |
action.accept(u); |
3611 |
< |
} |
4005 |
> |
new ForEachTransformedValueTask<K,V,U> |
4006 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
4007 |
> |
transformer, action).invoke(); |
4008 |
|
} |
4009 |
|
|
4010 |
|
/** |
4011 |
|
* Returns a non-null result from applying the given search |
4012 |
< |
* function on each value, or null if none. |
4012 |
> |
* function on each value, or null if none. Upon success, |
4013 |
> |
* further element processing is suppressed and the results of |
4014 |
> |
* any other parallel invocations of the search function are |
4015 |
> |
* ignored. |
4016 |
|
* |
4017 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
4018 |
+ |
* needed for this operation to be executed in parallel |
4019 |
|
* @param searchFunction a function returning a non-null |
4020 |
|
* result on success, else null |
4021 |
+ |
* @param <U> the return type of the search function |
4022 |
|
* @return a non-null result from applying the given search |
4023 |
|
* function on each value, or null if none |
4024 |
+ |
* @since 1.8 |
4025 |
|
*/ |
4026 |
< |
public <U> U searchValuesSequentially |
4027 |
< |
(Function<? super V, ? extends U> searchFunction) { |
4026 |
> |
public <U> U searchValues(long parallelismThreshold, |
4027 |
> |
Function<? super V, ? extends U> searchFunction) { |
4028 |
|
if (searchFunction == null) throw new NullPointerException(); |
4029 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
4030 |
< |
V v; U u; |
4031 |
< |
while ((v = it.advance()) != null) { |
3629 |
< |
if ((u = searchFunction.apply(v)) != null) |
3630 |
< |
return u; |
3631 |
< |
} |
3632 |
< |
return null; |
4029 |
> |
return new SearchValuesTask<K,V,U> |
4030 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
4031 |
> |
searchFunction, new AtomicReference<U>()).invoke(); |
4032 |
|
} |
4033 |
|
|
4034 |
|
/** |
4035 |
|
* Returns the result of accumulating all values using the |
4036 |
|
* given reducer to combine values, or null if none. |
4037 |
|
* |
4038 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
4039 |
+ |
* needed for this operation to be executed in parallel |
4040 |
|
* @param reducer a commutative associative combining function |
4041 |
|
* @return the result of accumulating all values |
4042 |
+ |
* @since 1.8 |
4043 |
|
*/ |
4044 |
< |
public V reduceValuesSequentially |
4045 |
< |
(BiFunction<? super V, ? super V, ? extends V> reducer) { |
4044 |
> |
public V reduceValues(long parallelismThreshold, |
4045 |
> |
BiFunction<? super V, ? super V, ? extends V> reducer) { |
4046 |
|
if (reducer == null) throw new NullPointerException(); |
4047 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
4048 |
< |
V r = null; V v; |
4049 |
< |
while ((v = it.advance()) != null) |
3648 |
< |
r = (r == null) ? v : reducer.apply(r, v); |
3649 |
< |
return r; |
4047 |
> |
return new ReduceValuesTask<K,V> |
4048 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
4049 |
> |
null, reducer).invoke(); |
4050 |
|
} |
4051 |
|
|
4052 |
|
/** |
4054 |
|
* of all values using the given reducer to combine values, or |
4055 |
|
* null if none. |
4056 |
|
* |
4057 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
4058 |
+ |
* needed for this operation to be executed in parallel |
4059 |
|
* @param transformer a function returning the transformation |
4060 |
|
* for an element, or null if there is no transformation (in |
4061 |
|
* which case it is not combined) |
4062 |
|
* @param reducer a commutative associative combining function |
4063 |
+ |
* @param <U> the return type of the transformer |
4064 |
|
* @return the result of accumulating the given transformation |
4065 |
|
* of all values |
4066 |
+ |
* @since 1.8 |
4067 |
|
*/ |
4068 |
< |
public <U> U reduceValuesSequentially |
4069 |
< |
(Function<? super V, ? extends U> transformer, |
4070 |
< |
BiFunction<? super U, ? super U, ? extends U> reducer) { |
4068 |
> |
public <U> U reduceValues(long parallelismThreshold, |
4069 |
> |
Function<? super V, ? extends U> transformer, |
4070 |
> |
BiFunction<? super U, ? super U, ? extends U> reducer) { |
4071 |
|
if (transformer == null || reducer == null) |
4072 |
|
throw new NullPointerException(); |
4073 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
4074 |
< |
U r = null, u; V v; |
4075 |
< |
while ((v = it.advance()) != null) { |
3672 |
< |
if ((u = transformer.apply(v)) != null) |
3673 |
< |
r = (r == null) ? u : reducer.apply(r, u); |
3674 |
< |
} |
3675 |
< |
return r; |
4073 |
> |
return new MapReduceValuesTask<K,V,U> |
4074 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
4075 |
> |
null, transformer, reducer).invoke(); |
4076 |
|
} |
4077 |
|
|
4078 |
|
/** |
4080 |
|
* of all values using the given reducer to combine values, |
4081 |
|
* and the given basis as an identity value. |
4082 |
|
* |
4083 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
4084 |
+ |
* needed for this operation to be executed in parallel |
4085 |
|
* @param transformer a function returning the transformation |
4086 |
|
* for an element |
4087 |
|
* @param basis the identity (initial default value) for the reduction |
4088 |
|
* @param reducer a commutative associative combining function |
4089 |
|
* @return the result of accumulating the given transformation |
4090 |
|
* of all values |
4091 |
+ |
* @since 1.8 |
4092 |
|
*/ |
4093 |
< |
public double reduceValuesToDoubleSequentially |
4094 |
< |
(ToDoubleFunction<? super V> transformer, |
4095 |
< |
double basis, |
4096 |
< |
DoubleBinaryOperator reducer) { |
4093 |
> |
public double reduceValuesToDouble(long parallelismThreshold, |
4094 |
> |
ToDoubleFunction<? super V> transformer, |
4095 |
> |
double basis, |
4096 |
> |
DoubleBinaryOperator reducer) { |
4097 |
|
if (transformer == null || reducer == null) |
4098 |
|
throw new NullPointerException(); |
4099 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
4100 |
< |
double r = basis; V v; |
4101 |
< |
while ((v = it.advance()) != null) |
3699 |
< |
r = reducer.applyAsDouble(r, transformer.applyAsDouble(v)); |
3700 |
< |
return r; |
4099 |
> |
return new MapReduceValuesToDoubleTask<K,V> |
4100 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
4101 |
> |
null, transformer, basis, reducer).invoke(); |
4102 |
|
} |
4103 |
|
|
4104 |
|
/** |
4106 |
|
* of all values using the given reducer to combine values, |
4107 |
|
* and the given basis as an identity value. |
4108 |
|
* |
4109 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
4110 |
+ |
* needed for this operation to be executed in parallel |
4111 |
|
* @param transformer a function returning the transformation |
4112 |
|
* for an element |
4113 |
|
* @param basis the identity (initial default value) for the reduction |
4114 |
|
* @param reducer a commutative associative combining function |
4115 |
|
* @return the result of accumulating the given transformation |
4116 |
|
* of all values |
4117 |
+ |
* @since 1.8 |
4118 |
|
*/ |
4119 |
< |
public long reduceValuesToLongSequentially |
4120 |
< |
(ToLongFunction<? super V> transformer, |
4121 |
< |
long basis, |
4122 |
< |
LongBinaryOperator reducer) { |
4119 |
> |
public long reduceValuesToLong(long parallelismThreshold, |
4120 |
> |
ToLongFunction<? super V> transformer, |
4121 |
> |
long basis, |
4122 |
> |
LongBinaryOperator reducer) { |
4123 |
|
if (transformer == null || reducer == null) |
4124 |
|
throw new NullPointerException(); |
4125 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
4126 |
< |
long r = basis; V v; |
4127 |
< |
while ((v = it.advance()) != null) |
3724 |
< |
r = reducer.applyAsLong(r, transformer.applyAsLong(v)); |
3725 |
< |
return r; |
4125 |
> |
return new MapReduceValuesToLongTask<K,V> |
4126 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
4127 |
> |
null, transformer, basis, reducer).invoke(); |
4128 |
|
} |
4129 |
|
|
4130 |
|
/** |
4132 |
|
* of all values using the given reducer to combine values, |
4133 |
|
* and the given basis as an identity value. |
4134 |
|
* |
4135 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
4136 |
+ |
* needed for this operation to be executed in parallel |
4137 |
|
* @param transformer a function returning the transformation |
4138 |
|
* for an element |
4139 |
|
* @param basis the identity (initial default value) for the reduction |
4140 |
|
* @param reducer a commutative associative combining function |
4141 |
|
* @return the result of accumulating the given transformation |
4142 |
|
* of all values |
4143 |
+ |
* @since 1.8 |
4144 |
|
*/ |
4145 |
< |
public int reduceValuesToIntSequentially |
4146 |
< |
(ToIntFunction<? super V> transformer, |
4147 |
< |
int basis, |
4148 |
< |
IntBinaryOperator reducer) { |
4145 |
> |
public int reduceValuesToInt(long parallelismThreshold, |
4146 |
> |
ToIntFunction<? super V> transformer, |
4147 |
> |
int basis, |
4148 |
> |
IntBinaryOperator reducer) { |
4149 |
|
if (transformer == null || reducer == null) |
4150 |
|
throw new NullPointerException(); |
4151 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
4152 |
< |
int r = basis; V v; |
4153 |
< |
while ((v = it.advance()) != null) |
3749 |
< |
r = reducer.applyAsInt(r, transformer.applyAsInt(v)); |
3750 |
< |
return r; |
4151 |
> |
return new MapReduceValuesToIntTask<K,V> |
4152 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
4153 |
> |
null, transformer, basis, reducer).invoke(); |
4154 |
|
} |
4155 |
|
|
4156 |
|
/** |
4157 |
|
* Performs the given action for each entry. |
4158 |
|
* |
4159 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
4160 |
+ |
* needed for this operation to be executed in parallel |
4161 |
|
* @param action the action |
4162 |
+ |
* @since 1.8 |
4163 |
|
*/ |
4164 |
< |
public void forEachEntrySequentially |
4165 |
< |
(Consumer<? super Map.Entry<K,V>> action) { |
4164 |
> |
public void forEachEntry(long parallelismThreshold, |
4165 |
> |
Consumer<? super Map.Entry<K,V>> action) { |
4166 |
|
if (action == null) throw new NullPointerException(); |
4167 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
4168 |
< |
V v; |
3763 |
< |
while ((v = it.advance()) != null) |
3764 |
< |
action.accept(entryFor(it.nextKey, v)); |
4167 |
> |
new ForEachEntryTask<K,V>(null, batchFor(parallelismThreshold), 0, 0, table, |
4168 |
> |
action).invoke(); |
4169 |
|
} |
4170 |
|
|
4171 |
|
/** |
4172 |
|
* Performs the given action for each non-null transformation |
4173 |
|
* of each entry. |
4174 |
|
* |
4175 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
4176 |
+ |
* needed for this operation to be executed in parallel |
4177 |
|
* @param transformer a function returning the transformation |
4178 |
|
* for an element, or null if there is no transformation (in |
4179 |
|
* which case the action is not applied) |
4180 |
|
* @param action the action |
4181 |
+ |
* @param <U> the return type of the transformer |
4182 |
+ |
* @since 1.8 |
4183 |
|
*/ |
4184 |
< |
public <U> void forEachEntrySequentially |
4185 |
< |
(Function<Map.Entry<K,V>, ? extends U> transformer, |
4186 |
< |
Consumer<? super U> action) { |
4184 |
> |
public <U> void forEachEntry(long parallelismThreshold, |
4185 |
> |
Function<Map.Entry<K,V>, ? extends U> transformer, |
4186 |
> |
Consumer<? super U> action) { |
4187 |
|
if (transformer == null || action == null) |
4188 |
|
throw new NullPointerException(); |
4189 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
4190 |
< |
V v; U u; |
4191 |
< |
while ((v = it.advance()) != null) { |
3784 |
< |
if ((u = transformer.apply(entryFor(it.nextKey, v))) != null) |
3785 |
< |
action.accept(u); |
3786 |
< |
} |
4189 |
> |
new ForEachTransformedEntryTask<K,V,U> |
4190 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
4191 |
> |
transformer, action).invoke(); |
4192 |
|
} |
4193 |
|
|
4194 |
|
/** |
4195 |
|
* Returns a non-null result from applying the given search |
4196 |
< |
* function on each entry, or null if none. |
4196 |
> |
* function on each entry, or null if none. Upon success, |
4197 |
> |
* further element processing is suppressed and the results of |
4198 |
> |
* any other parallel invocations of the search function are |
4199 |
> |
* ignored. |
4200 |
|
* |
4201 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
4202 |
+ |
* needed for this operation to be executed in parallel |
4203 |
|
* @param searchFunction a function returning a non-null |
4204 |
|
* result on success, else null |
4205 |
+ |
* @param <U> the return type of the search function |
4206 |
|
* @return a non-null result from applying the given search |
4207 |
|
* function on each entry, or null if none |
4208 |
+ |
* @since 1.8 |
4209 |
|
*/ |
4210 |
< |
public <U> U searchEntriesSequentially |
4211 |
< |
(Function<Map.Entry<K,V>, ? extends U> searchFunction) { |
4210 |
> |
public <U> U searchEntries(long parallelismThreshold, |
4211 |
> |
Function<Map.Entry<K,V>, ? extends U> searchFunction) { |
4212 |
|
if (searchFunction == null) throw new NullPointerException(); |
4213 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
4214 |
< |
V v; U u; |
4215 |
< |
while ((v = it.advance()) != null) { |
3804 |
< |
if ((u = searchFunction.apply(entryFor(it.nextKey, v))) != null) |
3805 |
< |
return u; |
3806 |
< |
} |
3807 |
< |
return null; |
4213 |
> |
return new SearchEntriesTask<K,V,U> |
4214 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
4215 |
> |
searchFunction, new AtomicReference<U>()).invoke(); |
4216 |
|
} |
4217 |
|
|
4218 |
|
/** |
4219 |
|
* Returns the result of accumulating all entries using the |
4220 |
|
* given reducer to combine values, or null if none. |
4221 |
|
* |
4222 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
4223 |
+ |
* needed for this operation to be executed in parallel |
4224 |
|
* @param reducer a commutative associative combining function |
4225 |
|
* @return the result of accumulating all entries |
4226 |
+ |
* @since 1.8 |
4227 |
|
*/ |
4228 |
< |
public Map.Entry<K,V> reduceEntriesSequentially |
4229 |
< |
(BiFunction<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) { |
4228 |
> |
public Map.Entry<K,V> reduceEntries(long parallelismThreshold, |
4229 |
> |
BiFunction<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) { |
4230 |
|
if (reducer == null) throw new NullPointerException(); |
4231 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
4232 |
< |
Map.Entry<K,V> r = null; V v; |
4233 |
< |
while ((v = it.advance()) != null) { |
3823 |
< |
Map.Entry<K,V> u = entryFor(it.nextKey, v); |
3824 |
< |
r = (r == null) ? u : reducer.apply(r, u); |
3825 |
< |
} |
3826 |
< |
return r; |
4231 |
> |
return new ReduceEntriesTask<K,V> |
4232 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
4233 |
> |
null, reducer).invoke(); |
4234 |
|
} |
4235 |
|
|
4236 |
|
/** |
4238 |
|
* of all entries using the given reducer to combine values, |
4239 |
|
* or null if none. |
4240 |
|
* |
4241 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
4242 |
+ |
* needed for this operation to be executed in parallel |
4243 |
|
* @param transformer a function returning the transformation |
4244 |
|
* for an element, or null if there is no transformation (in |
4245 |
|
* which case it is not combined) |
4246 |
|
* @param reducer a commutative associative combining function |
4247 |
+ |
* @param <U> the return type of the transformer |
4248 |
|
* @return the result of accumulating the given transformation |
4249 |
|
* of all entries |
4250 |
+ |
* @since 1.8 |
4251 |
|
*/ |
4252 |
< |
public <U> U reduceEntriesSequentially |
4253 |
< |
(Function<Map.Entry<K,V>, ? extends U> transformer, |
4254 |
< |
BiFunction<? super U, ? super U, ? extends U> reducer) { |
4252 |
> |
public <U> U reduceEntries(long parallelismThreshold, |
4253 |
> |
Function<Map.Entry<K,V>, ? extends U> transformer, |
4254 |
> |
BiFunction<? super U, ? super U, ? extends U> reducer) { |
4255 |
|
if (transformer == null || reducer == null) |
4256 |
|
throw new NullPointerException(); |
4257 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
4258 |
< |
U r = null, u; V v; |
4259 |
< |
while ((v = it.advance()) != null) { |
3849 |
< |
if ((u = transformer.apply(entryFor(it.nextKey, v))) != null) |
3850 |
< |
r = (r == null) ? u : reducer.apply(r, u); |
3851 |
< |
} |
3852 |
< |
return r; |
4257 |
> |
return new MapReduceEntriesTask<K,V,U> |
4258 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
4259 |
> |
null, transformer, reducer).invoke(); |
4260 |
|
} |
4261 |
|
|
4262 |
|
/** |
4264 |
|
* of all entries using the given reducer to combine values, |
4265 |
|
* and the given basis as an identity value. |
4266 |
|
* |
4267 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
4268 |
+ |
* needed for this operation to be executed in parallel |
4269 |
|
* @param transformer a function returning the transformation |
4270 |
|
* for an element |
4271 |
|
* @param basis the identity (initial default value) for the reduction |
4272 |
|
* @param reducer a commutative associative combining function |
4273 |
|
* @return the result of accumulating the given transformation |
4274 |
|
* of all entries |
4275 |
+ |
* @since 1.8 |
4276 |
|
*/ |
4277 |
< |
public double reduceEntriesToDoubleSequentially |
4278 |
< |
(ToDoubleFunction<Map.Entry<K,V>> transformer, |
4279 |
< |
double basis, |
4280 |
< |
DoubleBinaryOperator reducer) { |
4277 |
> |
public double reduceEntriesToDouble(long parallelismThreshold, |
4278 |
> |
ToDoubleFunction<Map.Entry<K,V>> transformer, |
4279 |
> |
double basis, |
4280 |
> |
DoubleBinaryOperator reducer) { |
4281 |
|
if (transformer == null || reducer == null) |
4282 |
|
throw new NullPointerException(); |
4283 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
4284 |
< |
double r = basis; V v; |
4285 |
< |
while ((v = it.advance()) != null) |
3876 |
< |
r = reducer.applyAsDouble(r, transformer.applyAsDouble(entryFor(it.nextKey, v))); |
3877 |
< |
return r; |
4283 |
> |
return new MapReduceEntriesToDoubleTask<K,V> |
4284 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
4285 |
> |
null, transformer, basis, reducer).invoke(); |
4286 |
|
} |
4287 |
|
|
4288 |
|
/** |
4290 |
|
* of all entries using the given reducer to combine values, |
4291 |
|
* and the given basis as an identity value. |
4292 |
|
* |
4293 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
4294 |
+ |
* needed for this operation to be executed in parallel |
4295 |
|
* @param transformer a function returning the transformation |
4296 |
|
* for an element |
4297 |
|
* @param basis the identity (initial default value) for the reduction |
4298 |
|
* @param reducer a commutative associative combining function |
4299 |
|
* @return the result of accumulating the given transformation |
4300 |
|
* of all entries |
4301 |
+ |
* @since 1.8 |
4302 |
|
*/ |
4303 |
< |
public long reduceEntriesToLongSequentially |
4304 |
< |
(ToLongFunction<Map.Entry<K,V>> transformer, |
4305 |
< |
long basis, |
4306 |
< |
LongBinaryOperator reducer) { |
4303 |
> |
public long reduceEntriesToLong(long parallelismThreshold, |
4304 |
> |
ToLongFunction<Map.Entry<K,V>> transformer, |
4305 |
> |
long basis, |
4306 |
> |
LongBinaryOperator reducer) { |
4307 |
|
if (transformer == null || reducer == null) |
4308 |
|
throw new NullPointerException(); |
4309 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
4310 |
< |
long r = basis; V v; |
4311 |
< |
while ((v = it.advance()) != null) |
3901 |
< |
r = reducer.applyAsLong(r, transformer.applyAsLong(entryFor(it.nextKey, v))); |
3902 |
< |
return r; |
4309 |
> |
return new MapReduceEntriesToLongTask<K,V> |
4310 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
4311 |
> |
null, transformer, basis, reducer).invoke(); |
4312 |
|
} |
4313 |
|
|
4314 |
|
/** |
4316 |
|
* of all entries using the given reducer to combine values, |
4317 |
|
* and the given basis as an identity value. |
4318 |
|
* |
4319 |
+ |
* @param parallelismThreshold the (estimated) number of elements |
4320 |
+ |
* needed for this operation to be executed in parallel |
4321 |
|
* @param transformer a function returning the transformation |
4322 |
|
* for an element |
4323 |
|
* @param basis the identity (initial default value) for the reduction |
4324 |
|
* @param reducer a commutative associative combining function |
4325 |
|
* @return the result of accumulating the given transformation |
4326 |
|
* of all entries |
4327 |
+ |
* @since 1.8 |
4328 |
|
*/ |
4329 |
< |
public int reduceEntriesToIntSequentially |
4330 |
< |
(ToIntFunction<Map.Entry<K,V>> transformer, |
4331 |
< |
int basis, |
4332 |
< |
IntBinaryOperator reducer) { |
4329 |
> |
public int reduceEntriesToInt(long parallelismThreshold, |
4330 |
> |
ToIntFunction<Map.Entry<K,V>> transformer, |
4331 |
> |
int basis, |
4332 |
> |
IntBinaryOperator reducer) { |
4333 |
|
if (transformer == null || reducer == null) |
4334 |
|
throw new NullPointerException(); |
4335 |
< |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
4336 |
< |
int r = basis; V v; |
4337 |
< |
while ((v = it.advance()) != null) |
3926 |
< |
r = reducer.applyAsInt(r, transformer.applyAsInt(entryFor(it.nextKey, v))); |
3927 |
< |
return r; |
3928 |
< |
} |
3929 |
< |
|
3930 |
< |
// Parallel bulk operations |
3931 |
< |
|
3932 |
< |
/** |
3933 |
< |
* Performs the given action for each (key, value). |
3934 |
< |
* |
3935 |
< |
* @param action the action |
3936 |
< |
*/ |
3937 |
< |
public void forEachInParallel(BiConsumer<? super K,? super V> action) { |
3938 |
< |
ForkJoinTasks.forEach |
3939 |
< |
(this, action).invoke(); |
3940 |
< |
} |
3941 |
< |
|
3942 |
< |
/** |
3943 |
< |
* Performs the given action for each non-null transformation |
3944 |
< |
* of each (key, value). |
3945 |
< |
* |
3946 |
< |
* @param transformer a function returning the transformation |
3947 |
< |
* for an element, or null if there is no transformation (in |
3948 |
< |
* which case the action is not applied) |
3949 |
< |
* @param action the action |
3950 |
< |
*/ |
3951 |
< |
public <U> void forEachInParallel |
3952 |
< |
(BiFunction<? super K, ? super V, ? extends U> transformer, |
3953 |
< |
Consumer<? super U> action) { |
3954 |
< |
ForkJoinTasks.forEach |
3955 |
< |
(this, transformer, action).invoke(); |
3956 |
< |
} |
3957 |
< |
|
3958 |
< |
/** |
3959 |
< |
* Returns a non-null result from applying the given search |
3960 |
< |
* function on each (key, value), or null if none. Upon |
3961 |
< |
* success, further element processing is suppressed and the |
3962 |
< |
* results of any other parallel invocations of the search |
3963 |
< |
* function are ignored. |
3964 |
< |
* |
3965 |
< |
* @param searchFunction a function returning a non-null |
3966 |
< |
* result on success, else null |
3967 |
< |
* @return a non-null result from applying the given search |
3968 |
< |
* function on each (key, value), or null if none |
3969 |
< |
*/ |
3970 |
< |
public <U> U searchInParallel |
3971 |
< |
(BiFunction<? super K, ? super V, ? extends U> searchFunction) { |
3972 |
< |
return ForkJoinTasks.search |
3973 |
< |
(this, searchFunction).invoke(); |
3974 |
< |
} |
3975 |
< |
|
3976 |
< |
/** |
3977 |
< |
* Returns the result of accumulating the given transformation |
3978 |
< |
* of all (key, value) pairs using the given reducer to |
3979 |
< |
* combine values, or null if none. |
3980 |
< |
* |
3981 |
< |
* @param transformer a function returning the transformation |
3982 |
< |
* for an element, or null if there is no transformation (in |
3983 |
< |
* which case it is not combined) |
3984 |
< |
* @param reducer a commutative associative combining function |
3985 |
< |
* @return the result of accumulating the given transformation |
3986 |
< |
* of all (key, value) pairs |
3987 |
< |
*/ |
3988 |
< |
public <U> U reduceInParallel |
3989 |
< |
(BiFunction<? super K, ? super V, ? extends U> transformer, |
3990 |
< |
BiFunction<? super U, ? super U, ? extends U> reducer) { |
3991 |
< |
return ForkJoinTasks.reduce |
3992 |
< |
(this, transformer, reducer).invoke(); |
3993 |
< |
} |
3994 |
< |
|
3995 |
< |
/** |
3996 |
< |
* Returns the result of accumulating the given transformation |
3997 |
< |
* of all (key, value) pairs using the given reducer to |
3998 |
< |
* combine values, and the given basis as an identity value. |
3999 |
< |
* |
4000 |
< |
* @param transformer a function returning the transformation |
4001 |
< |
* for an element |
4002 |
< |
* @param basis the identity (initial default value) for the reduction |
4003 |
< |
* @param reducer a commutative associative combining function |
4004 |
< |
* @return the result of accumulating the given transformation |
4005 |
< |
* of all (key, value) pairs |
4006 |
< |
*/ |
4007 |
< |
public double reduceToDoubleInParallel |
4008 |
< |
(ToDoubleBiFunction<? super K, ? super V> transformer, |
4009 |
< |
double basis, |
4010 |
< |
DoubleBinaryOperator reducer) { |
4011 |
< |
return ForkJoinTasks.reduceToDouble |
4012 |
< |
(this, transformer, basis, reducer).invoke(); |
4013 |
< |
} |
4014 |
< |
|
4015 |
< |
/** |
4016 |
< |
* Returns the result of accumulating the given transformation |
4017 |
< |
* of all (key, value) pairs using the given reducer to |
4018 |
< |
* combine values, and the given basis as an identity value. |
4019 |
< |
* |
4020 |
< |
* @param transformer a function returning the transformation |
4021 |
< |
* for an element |
4022 |
< |
* @param basis the identity (initial default value) for the reduction |
4023 |
< |
* @param reducer a commutative associative combining function |
4024 |
< |
* @return the result of accumulating the given transformation |
4025 |
< |
* of all (key, value) pairs |
4026 |
< |
*/ |
4027 |
< |
public long reduceToLongInParallel |
4028 |
< |
(ToLongBiFunction<? super K, ? super V> transformer, |
4029 |
< |
long basis, |
4030 |
< |
LongBinaryOperator reducer) { |
4031 |
< |
return ForkJoinTasks.reduceToLong |
4032 |
< |
(this, transformer, basis, reducer).invoke(); |
4033 |
< |
} |
4034 |
< |
|
4035 |
< |
/** |
4036 |
< |
* Returns the result of accumulating the given transformation |
4037 |
< |
* of all (key, value) pairs using the given reducer to |
4038 |
< |
* combine values, and the given basis as an identity value. |
4039 |
< |
* |
4040 |
< |
* @param transformer a function returning the transformation |
4041 |
< |
* for an element |
4042 |
< |
* @param basis the identity (initial default value) for the reduction |
4043 |
< |
* @param reducer a commutative associative combining function |
4044 |
< |
* @return the result of accumulating the given transformation |
4045 |
< |
* of all (key, value) pairs |
4046 |
< |
*/ |
4047 |
< |
public int reduceToIntInParallel |
4048 |
< |
(ToIntBiFunction<? super K, ? super V> transformer, |
4049 |
< |
int basis, |
4050 |
< |
IntBinaryOperator reducer) { |
4051 |
< |
return ForkJoinTasks.reduceToInt |
4052 |
< |
(this, transformer, basis, reducer).invoke(); |
4053 |
< |
} |
4054 |
< |
|
4055 |
< |
/** |
4056 |
< |
* Performs the given action for each key. |
4057 |
< |
* |
4058 |
< |
* @param action the action |
4059 |
< |
*/ |
4060 |
< |
public void forEachKeyInParallel(Consumer<? super K> action) { |
4061 |
< |
ForkJoinTasks.forEachKey |
4062 |
< |
(this, action).invoke(); |
4063 |
< |
} |
4064 |
< |
|
4065 |
< |
/** |
4066 |
< |
* Performs the given action for each non-null transformation |
4067 |
< |
* of each key. |
4068 |
< |
* |
4069 |
< |
* @param transformer a function returning the transformation |
4070 |
< |
* for an element, or null if there is no transformation (in |
4071 |
< |
* which case the action is not applied) |
4072 |
< |
* @param action the action |
4073 |
< |
*/ |
4074 |
< |
public <U> void forEachKeyInParallel |
4075 |
< |
(Function<? super K, ? extends U> transformer, |
4076 |
< |
Consumer<? super U> action) { |
4077 |
< |
ForkJoinTasks.forEachKey |
4078 |
< |
(this, transformer, action).invoke(); |
4079 |
< |
} |
4080 |
< |
|
4081 |
< |
/** |
4082 |
< |
* Returns a non-null result from applying the given search |
4083 |
< |
* function on each key, or null if none. Upon success, |
4084 |
< |
* further element processing is suppressed and the results of |
4085 |
< |
* any other parallel invocations of the search function are |
4086 |
< |
* ignored. |
4087 |
< |
* |
4088 |
< |
* @param searchFunction a function returning a non-null |
4089 |
< |
* result on success, else null |
4090 |
< |
* @return a non-null result from applying the given search |
4091 |
< |
* function on each key, or null if none |
4092 |
< |
*/ |
4093 |
< |
public <U> U searchKeysInParallel |
4094 |
< |
(Function<? super K, ? extends U> searchFunction) { |
4095 |
< |
return ForkJoinTasks.searchKeys |
4096 |
< |
(this, searchFunction).invoke(); |
4097 |
< |
} |
4098 |
< |
|
4099 |
< |
/** |
4100 |
< |
* Returns the result of accumulating all keys using the given |
4101 |
< |
* reducer to combine values, or null if none. |
4102 |
< |
* |
4103 |
< |
* @param reducer a commutative associative combining function |
4104 |
< |
* @return the result of accumulating all keys using the given |
4105 |
< |
* reducer to combine values, or null if none |
4106 |
< |
*/ |
4107 |
< |
public K reduceKeysInParallel |
4108 |
< |
(BiFunction<? super K, ? super K, ? extends K> reducer) { |
4109 |
< |
return ForkJoinTasks.reduceKeys |
4110 |
< |
(this, reducer).invoke(); |
4111 |
< |
} |
4112 |
< |
|
4113 |
< |
/** |
4114 |
< |
* Returns the result of accumulating the given transformation |
4115 |
< |
* of all keys using the given reducer to combine values, or |
4116 |
< |
* null if none. |
4117 |
< |
* |
4118 |
< |
* @param transformer a function returning the transformation |
4119 |
< |
* for an element, or null if there is no transformation (in |
4120 |
< |
* which case it is not combined) |
4121 |
< |
* @param reducer a commutative associative combining function |
4122 |
< |
* @return the result of accumulating the given transformation |
4123 |
< |
* of all keys |
4124 |
< |
*/ |
4125 |
< |
public <U> U reduceKeysInParallel |
4126 |
< |
(Function<? super K, ? extends U> transformer, |
4127 |
< |
BiFunction<? super U, ? super U, ? extends U> reducer) { |
4128 |
< |
return ForkJoinTasks.reduceKeys |
4129 |
< |
(this, transformer, reducer).invoke(); |
4130 |
< |
} |
4131 |
< |
|
4132 |
< |
/** |
4133 |
< |
* Returns the result of accumulating the given transformation |
4134 |
< |
* of all keys using the given reducer to combine values, and |
4135 |
< |
* the given basis as an identity value. |
4136 |
< |
* |
4137 |
< |
* @param transformer a function returning the transformation |
4138 |
< |
* for an element |
4139 |
< |
* @param basis the identity (initial default value) for the reduction |
4140 |
< |
* @param reducer a commutative associative combining function |
4141 |
< |
* @return the result of accumulating the given transformation |
4142 |
< |
* of all keys |
4143 |
< |
*/ |
4144 |
< |
public double reduceKeysToDoubleInParallel |
4145 |
< |
(ToDoubleFunction<? super K> transformer, |
4146 |
< |
double basis, |
4147 |
< |
DoubleBinaryOperator reducer) { |
4148 |
< |
return ForkJoinTasks.reduceKeysToDouble |
4149 |
< |
(this, transformer, basis, reducer).invoke(); |
4150 |
< |
} |
4151 |
< |
|
4152 |
< |
/** |
4153 |
< |
* Returns the result of accumulating the given transformation |
4154 |
< |
* of all keys using the given reducer to combine values, and |
4155 |
< |
* the given basis as an identity value. |
4156 |
< |
* |
4157 |
< |
* @param transformer a function returning the transformation |
4158 |
< |
* for an element |
4159 |
< |
* @param basis the identity (initial default value) for the reduction |
4160 |
< |
* @param reducer a commutative associative combining function |
4161 |
< |
* @return the result of accumulating the given transformation |
4162 |
< |
* of all keys |
4163 |
< |
*/ |
4164 |
< |
public long reduceKeysToLongInParallel |
4165 |
< |
(ToLongFunction<? super K> transformer, |
4166 |
< |
long basis, |
4167 |
< |
LongBinaryOperator reducer) { |
4168 |
< |
return ForkJoinTasks.reduceKeysToLong |
4169 |
< |
(this, transformer, basis, reducer).invoke(); |
4170 |
< |
} |
4171 |
< |
|
4172 |
< |
/** |
4173 |
< |
* Returns the result of accumulating the given transformation |
4174 |
< |
* of all keys using the given reducer to combine values, and |
4175 |
< |
* the given basis as an identity value. |
4176 |
< |
* |
4177 |
< |
* @param transformer a function returning the transformation |
4178 |
< |
* for an element |
4179 |
< |
* @param basis the identity (initial default value) for the reduction |
4180 |
< |
* @param reducer a commutative associative combining function |
4181 |
< |
* @return the result of accumulating the given transformation |
4182 |
< |
* of all keys |
4183 |
< |
*/ |
4184 |
< |
public int reduceKeysToIntInParallel |
4185 |
< |
(ToIntFunction<? super K> transformer, |
4186 |
< |
int basis, |
4187 |
< |
IntBinaryOperator reducer) { |
4188 |
< |
return ForkJoinTasks.reduceKeysToInt |
4189 |
< |
(this, transformer, basis, reducer).invoke(); |
4190 |
< |
} |
4191 |
< |
|
4192 |
< |
/** |
4193 |
< |
* Performs the given action for each value. |
4194 |
< |
* |
4195 |
< |
* @param action the action |
4196 |
< |
*/ |
4197 |
< |
public void forEachValueInParallel(Consumer<? super V> action) { |
4198 |
< |
ForkJoinTasks.forEachValue |
4199 |
< |
(this, action).invoke(); |
4200 |
< |
} |
4201 |
< |
|
4202 |
< |
/** |
4203 |
< |
* Performs the given action for each non-null transformation |
4204 |
< |
* of each value. |
4205 |
< |
* |
4206 |
< |
* @param transformer a function returning the transformation |
4207 |
< |
* for an element, or null if there is no transformation (in |
4208 |
< |
* which case the action is not applied) |
4209 |
< |
* @param action the action |
4210 |
< |
*/ |
4211 |
< |
public <U> void forEachValueInParallel |
4212 |
< |
(Function<? super V, ? extends U> transformer, |
4213 |
< |
Consumer<? super U> action) { |
4214 |
< |
ForkJoinTasks.forEachValue |
4215 |
< |
(this, transformer, action).invoke(); |
4216 |
< |
} |
4217 |
< |
|
4218 |
< |
/** |
4219 |
< |
* Returns a non-null result from applying the given search |
4220 |
< |
* function on each value, or null if none. Upon success, |
4221 |
< |
* further element processing is suppressed and the results of |
4222 |
< |
* any other parallel invocations of the search function are |
4223 |
< |
* ignored. |
4224 |
< |
* |
4225 |
< |
* @param searchFunction a function returning a non-null |
4226 |
< |
* result on success, else null |
4227 |
< |
* @return a non-null result from applying the given search |
4228 |
< |
* function on each value, or null if none |
4229 |
< |
*/ |
4230 |
< |
public <U> U searchValuesInParallel |
4231 |
< |
(Function<? super V, ? extends U> searchFunction) { |
4232 |
< |
return ForkJoinTasks.searchValues |
4233 |
< |
(this, searchFunction).invoke(); |
4234 |
< |
} |
4235 |
< |
|
4236 |
< |
/** |
4237 |
< |
* Returns the result of accumulating all values using the |
4238 |
< |
* given reducer to combine values, or null if none. |
4239 |
< |
* |
4240 |
< |
* @param reducer a commutative associative combining function |
4241 |
< |
* @return the result of accumulating all values |
4242 |
< |
*/ |
4243 |
< |
public V reduceValuesInParallel |
4244 |
< |
(BiFunction<? super V, ? super V, ? extends V> reducer) { |
4245 |
< |
return ForkJoinTasks.reduceValues |
4246 |
< |
(this, reducer).invoke(); |
4247 |
< |
} |
4248 |
< |
|
4249 |
< |
/** |
4250 |
< |
* Returns the result of accumulating the given transformation |
4251 |
< |
* of all values using the given reducer to combine values, or |
4252 |
< |
* null if none. |
4253 |
< |
* |
4254 |
< |
* @param transformer a function returning the transformation |
4255 |
< |
* for an element, or null if there is no transformation (in |
4256 |
< |
* which case it is not combined) |
4257 |
< |
* @param reducer a commutative associative combining function |
4258 |
< |
* @return the result of accumulating the given transformation |
4259 |
< |
* of all values |
4260 |
< |
*/ |
4261 |
< |
public <U> U reduceValuesInParallel |
4262 |
< |
(Function<? super V, ? extends U> transformer, |
4263 |
< |
BiFunction<? super U, ? super U, ? extends U> reducer) { |
4264 |
< |
return ForkJoinTasks.reduceValues |
4265 |
< |
(this, transformer, reducer).invoke(); |
4266 |
< |
} |
4267 |
< |
|
4268 |
< |
/** |
4269 |
< |
* Returns the result of accumulating the given transformation |
4270 |
< |
* of all values using the given reducer to combine values, |
4271 |
< |
* and the given basis as an identity value. |
4272 |
< |
* |
4273 |
< |
* @param transformer a function returning the transformation |
4274 |
< |
* for an element |
4275 |
< |
* @param basis the identity (initial default value) for the reduction |
4276 |
< |
* @param reducer a commutative associative combining function |
4277 |
< |
* @return the result of accumulating the given transformation |
4278 |
< |
* of all values |
4279 |
< |
*/ |
4280 |
< |
public double reduceValuesToDoubleInParallel |
4281 |
< |
(ToDoubleFunction<? super V> transformer, |
4282 |
< |
double basis, |
4283 |
< |
DoubleBinaryOperator reducer) { |
4284 |
< |
return ForkJoinTasks.reduceValuesToDouble |
4285 |
< |
(this, transformer, basis, reducer).invoke(); |
4286 |
< |
} |
4287 |
< |
|
4288 |
< |
/** |
4289 |
< |
* Returns the result of accumulating the given transformation |
4290 |
< |
* of all values using the given reducer to combine values, |
4291 |
< |
* and the given basis as an identity value. |
4292 |
< |
* |
4293 |
< |
* @param transformer a function returning the transformation |
4294 |
< |
* for an element |
4295 |
< |
* @param basis the identity (initial default value) for the reduction |
4296 |
< |
* @param reducer a commutative associative combining function |
4297 |
< |
* @return the result of accumulating the given transformation |
4298 |
< |
* of all values |
4299 |
< |
*/ |
4300 |
< |
public long reduceValuesToLongInParallel |
4301 |
< |
(ToLongFunction<? super V> transformer, |
4302 |
< |
long basis, |
4303 |
< |
LongBinaryOperator reducer) { |
4304 |
< |
return ForkJoinTasks.reduceValuesToLong |
4305 |
< |
(this, transformer, basis, reducer).invoke(); |
4306 |
< |
} |
4307 |
< |
|
4308 |
< |
/** |
4309 |
< |
* Returns the result of accumulating the given transformation |
4310 |
< |
* of all values using the given reducer to combine values, |
4311 |
< |
* and the given basis as an identity value. |
4312 |
< |
* |
4313 |
< |
* @param transformer a function returning the transformation |
4314 |
< |
* for an element |
4315 |
< |
* @param basis the identity (initial default value) for the reduction |
4316 |
< |
* @param reducer a commutative associative combining function |
4317 |
< |
* @return the result of accumulating the given transformation |
4318 |
< |
* of all values |
4319 |
< |
*/ |
4320 |
< |
public int reduceValuesToIntInParallel |
4321 |
< |
(ToIntFunction<? super V> transformer, |
4322 |
< |
int basis, |
4323 |
< |
IntBinaryOperator reducer) { |
4324 |
< |
return ForkJoinTasks.reduceValuesToInt |
4325 |
< |
(this, transformer, basis, reducer).invoke(); |
4326 |
< |
} |
4327 |
< |
|
4328 |
< |
/** |
4329 |
< |
* Performs the given action for each entry. |
4330 |
< |
* |
4331 |
< |
* @param action the action |
4332 |
< |
*/ |
4333 |
< |
public void forEachEntryInParallel(Consumer<? super Map.Entry<K,V>> action) { |
4334 |
< |
ForkJoinTasks.forEachEntry |
4335 |
< |
(this, action).invoke(); |
4336 |
< |
} |
4337 |
< |
|
4338 |
< |
/** |
4339 |
< |
* Performs the given action for each non-null transformation |
4340 |
< |
* of each entry. |
4341 |
< |
* |
4342 |
< |
* @param transformer a function returning the transformation |
4343 |
< |
* for an element, or null if there is no transformation (in |
4344 |
< |
* which case the action is not applied) |
4345 |
< |
* @param action the action |
4346 |
< |
*/ |
4347 |
< |
public <U> void forEachEntryInParallel |
4348 |
< |
(Function<Map.Entry<K,V>, ? extends U> transformer, |
4349 |
< |
Consumer<? super U> action) { |
4350 |
< |
ForkJoinTasks.forEachEntry |
4351 |
< |
(this, transformer, action).invoke(); |
4352 |
< |
} |
4353 |
< |
|
4354 |
< |
/** |
4355 |
< |
* Returns a non-null result from applying the given search |
4356 |
< |
* function on each entry, or null if none. Upon success, |
4357 |
< |
* further element processing is suppressed and the results of |
4358 |
< |
* any other parallel invocations of the search function are |
4359 |
< |
* ignored. |
4360 |
< |
* |
4361 |
< |
* @param searchFunction a function returning a non-null |
4362 |
< |
* result on success, else null |
4363 |
< |
* @return a non-null result from applying the given search |
4364 |
< |
* function on each entry, or null if none |
4365 |
< |
*/ |
4366 |
< |
public <U> U searchEntriesInParallel |
4367 |
< |
(Function<Map.Entry<K,V>, ? extends U> searchFunction) { |
4368 |
< |
return ForkJoinTasks.searchEntries |
4369 |
< |
(this, searchFunction).invoke(); |
4370 |
< |
} |
4371 |
< |
|
4372 |
< |
/** |
4373 |
< |
* Returns the result of accumulating all entries using the |
4374 |
< |
* given reducer to combine values, or null if none. |
4375 |
< |
* |
4376 |
< |
* @param reducer a commutative associative combining function |
4377 |
< |
* @return the result of accumulating all entries |
4378 |
< |
*/ |
4379 |
< |
public Map.Entry<K,V> reduceEntriesInParallel |
4380 |
< |
(BiFunction<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) { |
4381 |
< |
return ForkJoinTasks.reduceEntries |
4382 |
< |
(this, reducer).invoke(); |
4383 |
< |
} |
4384 |
< |
|
4385 |
< |
/** |
4386 |
< |
* Returns the result of accumulating the given transformation |
4387 |
< |
* of all entries using the given reducer to combine values, |
4388 |
< |
* or null if none. |
4389 |
< |
* |
4390 |
< |
* @param transformer a function returning the transformation |
4391 |
< |
* for an element, or null if there is no transformation (in |
4392 |
< |
* which case it is not combined) |
4393 |
< |
* @param reducer a commutative associative combining function |
4394 |
< |
* @return the result of accumulating the given transformation |
4395 |
< |
* of all entries |
4396 |
< |
*/ |
4397 |
< |
public <U> U reduceEntriesInParallel |
4398 |
< |
(Function<Map.Entry<K,V>, ? extends U> transformer, |
4399 |
< |
BiFunction<? super U, ? super U, ? extends U> reducer) { |
4400 |
< |
return ForkJoinTasks.reduceEntries |
4401 |
< |
(this, transformer, reducer).invoke(); |
4402 |
< |
} |
4403 |
< |
|
4404 |
< |
/** |
4405 |
< |
* Returns the result of accumulating the given transformation |
4406 |
< |
* of all entries using the given reducer to combine values, |
4407 |
< |
* and the given basis as an identity value. |
4408 |
< |
* |
4409 |
< |
* @param transformer a function returning the transformation |
4410 |
< |
* for an element |
4411 |
< |
* @param basis the identity (initial default value) for the reduction |
4412 |
< |
* @param reducer a commutative associative combining function |
4413 |
< |
* @return the result of accumulating the given transformation |
4414 |
< |
* of all entries |
4415 |
< |
*/ |
4416 |
< |
public double reduceEntriesToDoubleInParallel |
4417 |
< |
(ToDoubleFunction<Map.Entry<K,V>> transformer, |
4418 |
< |
double basis, |
4419 |
< |
DoubleBinaryOperator reducer) { |
4420 |
< |
return ForkJoinTasks.reduceEntriesToDouble |
4421 |
< |
(this, transformer, basis, reducer).invoke(); |
4422 |
< |
} |
4423 |
< |
|
4424 |
< |
/** |
4425 |
< |
* Returns the result of accumulating the given transformation |
4426 |
< |
* of all entries using the given reducer to combine values, |
4427 |
< |
* and the given basis as an identity value. |
4428 |
< |
* |
4429 |
< |
* @param transformer a function returning the transformation |
4430 |
< |
* for an element |
4431 |
< |
* @param basis the identity (initial default value) for the reduction |
4432 |
< |
* @param reducer a commutative associative combining function |
4433 |
< |
* @return the result of accumulating the given transformation |
4434 |
< |
* of all entries |
4435 |
< |
*/ |
4436 |
< |
public long reduceEntriesToLongInParallel |
4437 |
< |
(ToLongFunction<Map.Entry<K,V>> transformer, |
4438 |
< |
long basis, |
4439 |
< |
LongBinaryOperator reducer) { |
4440 |
< |
return ForkJoinTasks.reduceEntriesToLong |
4441 |
< |
(this, transformer, basis, reducer).invoke(); |
4442 |
< |
} |
4443 |
< |
|
4444 |
< |
/** |
4445 |
< |
* Returns the result of accumulating the given transformation |
4446 |
< |
* of all entries using the given reducer to combine values, |
4447 |
< |
* and the given basis as an identity value. |
4448 |
< |
* |
4449 |
< |
* @param transformer a function returning the transformation |
4450 |
< |
* for an element |
4451 |
< |
* @param basis the identity (initial default value) for the reduction |
4452 |
< |
* @param reducer a commutative associative combining function |
4453 |
< |
* @return the result of accumulating the given transformation |
4454 |
< |
* of all entries |
4455 |
< |
*/ |
4456 |
< |
public int reduceEntriesToIntInParallel |
4457 |
< |
(ToIntFunction<Map.Entry<K,V>> transformer, |
4458 |
< |
int basis, |
4459 |
< |
IntBinaryOperator reducer) { |
4460 |
< |
return ForkJoinTasks.reduceEntriesToInt |
4461 |
< |
(this, transformer, basis, reducer).invoke(); |
4335 |
> |
return new MapReduceEntriesToIntTask<K,V> |
4336 |
> |
(null, batchFor(parallelismThreshold), 0, 0, table, |
4337 |
> |
null, transformer, basis, reducer).invoke(); |
4338 |
|
} |
4339 |
|
|
4340 |
|
|
4343 |
|
/** |
4344 |
|
* Base class for views. |
4345 |
|
*/ |
4346 |
< |
abstract static class CHMCollectionView<K,V,E> |
4347 |
< |
implements Collection<E>, java.io.Serializable { |
4346 |
> |
abstract static class CollectionView<K,V,E> |
4347 |
> |
implements Collection<E>, java.io.Serializable { |
4348 |
|
private static final long serialVersionUID = 7249069246763182397L; |
4349 |
|
final ConcurrentHashMap<K,V> map; |
4350 |
< |
CHMCollectionView(ConcurrentHashMap<K,V> map) { this.map = map; } |
4350 |
> |
CollectionView(ConcurrentHashMap<K,V> map) { this.map = map; } |
4351 |
|
|
4352 |
|
/** |
4353 |
|
* Returns the map backing this view. |
4367 |
|
// implementations below rely on concrete classes supplying these |
4368 |
|
// abstract methods |
4369 |
|
/** |
4370 |
< |
* Returns a "weakly consistent" iterator that will never |
4371 |
< |
* throw {@link ConcurrentModificationException}, and |
4372 |
< |
* guarantees to traverse elements as they existed upon |
4373 |
< |
* construction of the iterator, and may (but is not |
4374 |
< |
* guaranteed to) reflect any modifications subsequent to |
4375 |
< |
* construction. |
4370 |
> |
* Returns an iterator over the elements in this collection. |
4371 |
> |
* |
4372 |
> |
* <p>The returned iterator is |
4373 |
> |
* <a href="package-summary.html#Weakly"><i>weakly consistent</i></a>. |
4374 |
> |
* |
4375 |
> |
* @return an iterator over the elements in this collection |
4376 |
|
*/ |
4377 |
|
public abstract Iterator<E> iterator(); |
4378 |
|
public abstract boolean contains(Object o); |
4470 |
|
} |
4471 |
|
|
4472 |
|
public final boolean removeAll(Collection<?> c) { |
4473 |
+ |
if (c == null) throw new NullPointerException(); |
4474 |
|
boolean modified = false; |
4475 |
|
for (Iterator<E> it = iterator(); it.hasNext();) { |
4476 |
|
if (c.contains(it.next())) { |
4482 |
|
} |
4483 |
|
|
4484 |
|
public final boolean retainAll(Collection<?> c) { |
4485 |
+ |
if (c == null) throw new NullPointerException(); |
4486 |
|
boolean modified = false; |
4487 |
|
for (Iterator<E> it = iterator(); it.hasNext();) { |
4488 |
|
if (!c.contains(it.next())) { |
4495 |
|
|
4496 |
|
} |
4497 |
|
|
4620 |
– |
abstract static class CHMSetView<K,V,E> |
4621 |
– |
extends CHMCollectionView<K,V,E> |
4622 |
– |
implements Set<E>, java.io.Serializable { |
4623 |
– |
private static final long serialVersionUID = 7249069246763182397L; |
4624 |
– |
CHMSetView(ConcurrentHashMap<K,V> map) { super(map); } |
4625 |
– |
|
4626 |
– |
// Implement Set API |
4627 |
– |
|
4628 |
– |
/** |
4629 |
– |
* Implements {@link Set#hashCode()}. |
4630 |
– |
* @return the hash code value for this set |
4631 |
– |
*/ |
4632 |
– |
public final int hashCode() { |
4633 |
– |
int h = 0; |
4634 |
– |
for (E e : this) |
4635 |
– |
h += e.hashCode(); |
4636 |
– |
return h; |
4637 |
– |
} |
4638 |
– |
|
4639 |
– |
/** |
4640 |
– |
* Implements {@link Set#equals(Object)}. |
4641 |
– |
* @param o object to be compared for equality with this set |
4642 |
– |
* @return {@code true} if the specified object is equal to this set |
4643 |
– |
*/ |
4644 |
– |
public final boolean equals(Object o) { |
4645 |
– |
Set<?> c; |
4646 |
– |
return ((o instanceof Set) && |
4647 |
– |
((c = (Set<?>)o) == this || |
4648 |
– |
(containsAll(c) && c.containsAll(this)))); |
4649 |
– |
} |
4650 |
– |
} |
4651 |
– |
|
4498 |
|
/** |
4499 |
|
* A view of a ConcurrentHashMap as a {@link Set} of keys, in |
4500 |
|
* which additions may optionally be enabled by mapping to a |
4503 |
|
* {@link #keySet(Object) keySet(V)}, |
4504 |
|
* {@link #newKeySet() newKeySet()}, |
4505 |
|
* {@link #newKeySet(int) newKeySet(int)}. |
4506 |
+ |
* |
4507 |
+ |
* @since 1.8 |
4508 |
|
*/ |
4509 |
< |
public static class KeySetView<K,V> |
4510 |
< |
extends CHMSetView<K,V,K> |
4663 |
< |
implements Set<K>, java.io.Serializable { |
4509 |
> |
public static class KeySetView<K,V> extends CollectionView<K,V,K> |
4510 |
> |
implements Set<K>, java.io.Serializable { |
4511 |
|
private static final long serialVersionUID = 7249069246763182397L; |
4512 |
|
private final V value; |
4513 |
|
KeySetView(ConcurrentHashMap<K,V> map, V value) { // non-public |
4544 |
|
/** |
4545 |
|
* @return an iterator over the keys of the backing map |
4546 |
|
*/ |
4547 |
< |
public Iterator<K> iterator() { return new KeyIterator<K,V>(map); } |
4547 |
> |
public Iterator<K> iterator() { |
4548 |
> |
Node<K,V>[] t; |
4549 |
> |
ConcurrentHashMap<K,V> m = map; |
4550 |
> |
int f = (t = m.table) == null ? 0 : t.length; |
4551 |
> |
return new KeyIterator<K,V>(t, f, 0, f, m); |
4552 |
> |
} |
4553 |
|
|
4554 |
|
/** |
4555 |
|
* Adds the specified key to this set view by mapping the key to |
4565 |
|
V v; |
4566 |
|
if ((v = value) == null) |
4567 |
|
throw new UnsupportedOperationException(); |
4568 |
< |
return map.internalPut(e, v, true) == null; |
4568 |
> |
return map.putVal(e, v, true) == null; |
4569 |
|
} |
4570 |
|
|
4571 |
|
/** |
4585 |
|
if ((v = value) == null) |
4586 |
|
throw new UnsupportedOperationException(); |
4587 |
|
for (K e : c) { |
4588 |
< |
if (map.internalPut(e, v, true) == null) |
4588 |
> |
if (map.putVal(e, v, true) == null) |
4589 |
|
added = true; |
4590 |
|
} |
4591 |
|
return added; |
4592 |
|
} |
4593 |
|
|
4594 |
< |
public Stream<K> stream() { |
4595 |
< |
return Streams.stream(new KeyIterator<>(map, null)); |
4594 |
> |
public int hashCode() { |
4595 |
> |
int h = 0; |
4596 |
> |
for (K e : this) |
4597 |
> |
h += e.hashCode(); |
4598 |
> |
return h; |
4599 |
|
} |
4600 |
< |
public Stream<K> parallelStream() { |
4601 |
< |
return Streams.parallelStream(new KeyIterator<K,V>(map, null)); |
4600 |
> |
|
4601 |
> |
public boolean equals(Object o) { |
4602 |
> |
Set<?> c; |
4603 |
> |
return ((o instanceof Set) && |
4604 |
> |
((c = (Set<?>)o) == this || |
4605 |
> |
(containsAll(c) && c.containsAll(this)))); |
4606 |
> |
} |
4607 |
> |
|
4608 |
> |
public Spliterator<K> spliterator() { |
4609 |
> |
Node<K,V>[] t; |
4610 |
> |
ConcurrentHashMap<K,V> m = map; |
4611 |
> |
long n = m.sumCount(); |
4612 |
> |
int f = (t = m.table) == null ? 0 : t.length; |
4613 |
> |
return new KeySpliterator<K,V>(t, f, 0, f, n < 0L ? 0L : n); |
4614 |
> |
} |
4615 |
> |
|
4616 |
> |
public void forEach(Consumer<? super K> action) { |
4617 |
> |
if (action == null) throw new NullPointerException(); |
4618 |
> |
Node<K,V>[] t; |
4619 |
> |
if ((t = map.table) != null) { |
4620 |
> |
Traverser<K,V> it = new Traverser<K,V>(t, t.length, 0, t.length); |
4621 |
> |
for (Node<K,V> p; (p = it.advance()) != null; ) |
4622 |
> |
action.accept(p.key); |
4623 |
> |
} |
4624 |
|
} |
4625 |
|
} |
4626 |
|
|
4628 |
|
* A view of a ConcurrentHashMap as a {@link Collection} of |
4629 |
|
* values, in which additions are disabled. This class cannot be |
4630 |
|
* directly instantiated. See {@link #values()}. |
4631 |
< |
* |
4632 |
< |
* <p>The view's {@code iterator} is a "weakly consistent" iterator |
4633 |
< |
* that will never throw {@link ConcurrentModificationException}, |
4757 |
< |
* and guarantees to traverse elements as they existed upon |
4758 |
< |
* construction of the iterator, and may (but is not guaranteed to) |
4759 |
< |
* reflect any modifications subsequent to construction. |
4760 |
< |
*/ |
4761 |
< |
public static final class ValuesView<K,V> |
4762 |
< |
extends CHMCollectionView<K,V,V> |
4763 |
< |
implements Collection<V>, java.io.Serializable { |
4631 |
> |
*/ |
4632 |
> |
static final class ValuesView<K,V> extends CollectionView<K,V,V> |
4633 |
> |
implements Collection<V>, java.io.Serializable { |
4634 |
|
private static final long serialVersionUID = 2249069246763182397L; |
4635 |
|
ValuesView(ConcurrentHashMap<K,V> map) { super(map); } |
4636 |
|
public final boolean contains(Object o) { |
4637 |
|
return map.containsValue(o); |
4638 |
|
} |
4639 |
+ |
|
4640 |
|
public final boolean remove(Object o) { |
4641 |
|
if (o != null) { |
4642 |
|
for (Iterator<V> it = iterator(); it.hasNext();) { |
4649 |
|
return false; |
4650 |
|
} |
4651 |
|
|
4781 |
– |
/** |
4782 |
– |
* @return an iterator over the values of the backing map |
4783 |
– |
*/ |
4652 |
|
public final Iterator<V> iterator() { |
4653 |
< |
return new ValueIterator<K,V>(map); |
4653 |
> |
ConcurrentHashMap<K,V> m = map; |
4654 |
> |
Node<K,V>[] t; |
4655 |
> |
int f = (t = m.table) == null ? 0 : t.length; |
4656 |
> |
return new ValueIterator<K,V>(t, f, 0, f, m); |
4657 |
|
} |
4658 |
|
|
4788 |
– |
/** Always throws {@link UnsupportedOperationException}. */ |
4659 |
|
public final boolean add(V e) { |
4660 |
|
throw new UnsupportedOperationException(); |
4661 |
|
} |
4792 |
– |
/** Always throws {@link UnsupportedOperationException}. */ |
4662 |
|
public final boolean addAll(Collection<? extends V> c) { |
4663 |
|
throw new UnsupportedOperationException(); |
4664 |
|
} |
4665 |
|
|
4666 |
< |
public Stream<V> stream() { |
4667 |
< |
return Streams.stream(new ValueIterator<K,V>(map, null)); |
4666 |
> |
public Spliterator<V> spliterator() { |
4667 |
> |
Node<K,V>[] t; |
4668 |
> |
ConcurrentHashMap<K,V> m = map; |
4669 |
> |
long n = m.sumCount(); |
4670 |
> |
int f = (t = m.table) == null ? 0 : t.length; |
4671 |
> |
return new ValueSpliterator<K,V>(t, f, 0, f, n < 0L ? 0L : n); |
4672 |
|
} |
4673 |
|
|
4674 |
< |
public Stream<V> parallelStream() { |
4675 |
< |
return Streams.parallelStream(new ValueIterator<K,V>(map, null)); |
4674 |
> |
public void forEach(Consumer<? super V> action) { |
4675 |
> |
if (action == null) throw new NullPointerException(); |
4676 |
> |
Node<K,V>[] t; |
4677 |
> |
if ((t = map.table) != null) { |
4678 |
> |
Traverser<K,V> it = new Traverser<K,V>(t, t.length, 0, t.length); |
4679 |
> |
for (Node<K,V> p; (p = it.advance()) != null; ) |
4680 |
> |
action.accept(p.val); |
4681 |
> |
} |
4682 |
|
} |
4804 |
– |
|
4683 |
|
} |
4684 |
|
|
4685 |
|
/** |
4687 |
|
* entries. This class cannot be directly instantiated. See |
4688 |
|
* {@link #entrySet()}. |
4689 |
|
*/ |
4690 |
< |
public static final class EntrySetView<K,V> |
4691 |
< |
extends CHMSetView<K,V,Map.Entry<K,V>> |
4814 |
< |
implements Set<Map.Entry<K,V>>, java.io.Serializable { |
4690 |
> |
static final class EntrySetView<K,V> extends CollectionView<K,V,Map.Entry<K,V>> |
4691 |
> |
implements Set<Map.Entry<K,V>>, java.io.Serializable { |
4692 |
|
private static final long serialVersionUID = 2249069246763182397L; |
4693 |
|
EntrySetView(ConcurrentHashMap<K,V> map) { super(map); } |
4694 |
|
|
4695 |
< |
public final boolean contains(Object o) { |
4695 |
> |
public boolean contains(Object o) { |
4696 |
|
Object k, v, r; Map.Entry<?,?> e; |
4697 |
|
return ((o instanceof Map.Entry) && |
4698 |
|
(k = (e = (Map.Entry<?,?>)o).getKey()) != null && |
4700 |
|
(v = e.getValue()) != null && |
4701 |
|
(v == r || v.equals(r))); |
4702 |
|
} |
4703 |
< |
public final boolean remove(Object o) { |
4703 |
> |
|
4704 |
> |
public boolean remove(Object o) { |
4705 |
|
Object k, v; Map.Entry<?,?> e; |
4706 |
|
return ((o instanceof Map.Entry) && |
4707 |
|
(k = (e = (Map.Entry<?,?>)o).getKey()) != null && |
4712 |
|
/** |
4713 |
|
* @return an iterator over the entries of the backing map |
4714 |
|
*/ |
4715 |
< |
public final Iterator<Map.Entry<K,V>> iterator() { |
4716 |
< |
return new EntryIterator<K,V>(map); |
4715 |
> |
public Iterator<Map.Entry<K,V>> iterator() { |
4716 |
> |
ConcurrentHashMap<K,V> m = map; |
4717 |
> |
Node<K,V>[] t; |
4718 |
> |
int f = (t = m.table) == null ? 0 : t.length; |
4719 |
> |
return new EntryIterator<K,V>(t, f, 0, f, m); |
4720 |
|
} |
4721 |
|
|
4722 |
< |
/** |
4723 |
< |
* Adds the specified mapping to this view. |
4843 |
< |
* |
4844 |
< |
* @param e mapping to be added |
4845 |
< |
* @return {@code true} if this set changed as a result of the call |
4846 |
< |
* @throws NullPointerException if the entry, its key, or its |
4847 |
< |
* value is null |
4848 |
< |
*/ |
4849 |
< |
public final boolean add(Entry<K,V> e) { |
4850 |
< |
return map.internalPut(e.getKey(), e.getValue(), false) == null; |
4722 |
> |
public boolean add(Entry<K,V> e) { |
4723 |
> |
return map.putVal(e.getKey(), e.getValue(), false) == null; |
4724 |
|
} |
4725 |
< |
/** |
4726 |
< |
* Adds all of the mappings in the specified collection to this |
4854 |
< |
* set, as if by calling {@link #add(Map.Entry)} on each one. |
4855 |
< |
* @param c the mappings to be inserted into this set |
4856 |
< |
* @return {@code true} if this set changed as a result of the call |
4857 |
< |
* @throws NullPointerException if the collection or any of its |
4858 |
< |
* entries, keys, or values are null |
4859 |
< |
*/ |
4860 |
< |
public final boolean addAll(Collection<? extends Entry<K,V>> c) { |
4725 |
> |
|
4726 |
> |
public boolean addAll(Collection<? extends Entry<K,V>> c) { |
4727 |
|
boolean added = false; |
4728 |
|
for (Entry<K,V> e : c) { |
4729 |
|
if (add(e)) |
4732 |
|
return added; |
4733 |
|
} |
4734 |
|
|
4735 |
< |
public Stream<Map.Entry<K,V>> stream() { |
4736 |
< |
return Streams.stream(new EntryIterator<K,V>(map, null)); |
4737 |
< |
} |
4738 |
< |
|
4739 |
< |
public Stream<Map.Entry<K,V>> parallelStream() { |
4740 |
< |
return Streams.parallelStream(new EntryIterator<K,V>(map, null)); |
4741 |
< |
} |
4742 |
< |
} |
4743 |
< |
|
4744 |
< |
// --------------------------------------------------------------------- |
4879 |
< |
|
4880 |
< |
/** |
4881 |
< |
* Predefined tasks for performing bulk parallel operations on |
4882 |
< |
* ConcurrentHashMaps. These tasks follow the forms and rules used |
4883 |
< |
* for bulk operations. Each method has the same name, but returns |
4884 |
< |
* a task rather than invoking it. These methods may be useful in |
4885 |
< |
* custom applications such as submitting a task without waiting |
4886 |
< |
* for completion, using a custom pool, or combining with other |
4887 |
< |
* tasks. |
4888 |
< |
*/ |
4889 |
< |
public static class ForkJoinTasks { |
4890 |
< |
private ForkJoinTasks() {} |
4891 |
< |
|
4892 |
< |
/** |
4893 |
< |
* Returns a task that when invoked, performs the given |
4894 |
< |
* action for each (key, value) |
4895 |
< |
* |
4896 |
< |
* @param map the map |
4897 |
< |
* @param action the action |
4898 |
< |
* @return the task |
4899 |
< |
*/ |
4900 |
< |
public static <K,V> ForkJoinTask<Void> forEach |
4901 |
< |
(ConcurrentHashMap<K,V> map, |
4902 |
< |
BiConsumer<? super K, ? super V> action) { |
4903 |
< |
if (action == null) throw new NullPointerException(); |
4904 |
< |
return new ForEachMappingTask<K,V>(map, null, -1, action); |
4905 |
< |
} |
4906 |
< |
|
4907 |
< |
/** |
4908 |
< |
* Returns a task that when invoked, performs the given |
4909 |
< |
* action for each non-null transformation of each (key, value) |
4910 |
< |
* |
4911 |
< |
* @param map the map |
4912 |
< |
* @param transformer a function returning the transformation |
4913 |
< |
* for an element, or null if there is no transformation (in |
4914 |
< |
* which case the action is not applied) |
4915 |
< |
* @param action the action |
4916 |
< |
* @return the task |
4917 |
< |
*/ |
4918 |
< |
public static <K,V,U> ForkJoinTask<Void> forEach |
4919 |
< |
(ConcurrentHashMap<K,V> map, |
4920 |
< |
BiFunction<? super K, ? super V, ? extends U> transformer, |
4921 |
< |
Consumer<? super U> action) { |
4922 |
< |
if (transformer == null || action == null) |
4923 |
< |
throw new NullPointerException(); |
4924 |
< |
return new ForEachTransformedMappingTask<K,V,U> |
4925 |
< |
(map, null, -1, transformer, action); |
4926 |
< |
} |
4927 |
< |
|
4928 |
< |
/** |
4929 |
< |
* Returns a task that when invoked, returns a non-null result |
4930 |
< |
* from applying the given search function on each (key, |
4931 |
< |
* value), or null if none. Upon success, further element |
4932 |
< |
* processing is suppressed and the results of any other |
4933 |
< |
* parallel invocations of the search function are ignored. |
4934 |
< |
* |
4935 |
< |
* @param map the map |
4936 |
< |
* @param searchFunction a function returning a non-null |
4937 |
< |
* result on success, else null |
4938 |
< |
* @return the task |
4939 |
< |
*/ |
4940 |
< |
public static <K,V,U> ForkJoinTask<U> search |
4941 |
< |
(ConcurrentHashMap<K,V> map, |
4942 |
< |
BiFunction<? super K, ? super V, ? extends U> searchFunction) { |
4943 |
< |
if (searchFunction == null) throw new NullPointerException(); |
4944 |
< |
return new SearchMappingsTask<K,V,U> |
4945 |
< |
(map, null, -1, searchFunction, |
4946 |
< |
new AtomicReference<U>()); |
4947 |
< |
} |
4948 |
< |
|
4949 |
< |
/** |
4950 |
< |
* Returns a task that when invoked, returns the result of |
4951 |
< |
* accumulating the given transformation of all (key, value) pairs |
4952 |
< |
* using the given reducer to combine values, or null if none. |
4953 |
< |
* |
4954 |
< |
* @param map the map |
4955 |
< |
* @param transformer a function returning the transformation |
4956 |
< |
* for an element, or null if there is no transformation (in |
4957 |
< |
* which case it is not combined) |
4958 |
< |
* @param reducer a commutative associative combining function |
4959 |
< |
* @return the task |
4960 |
< |
*/ |
4961 |
< |
public static <K,V,U> ForkJoinTask<U> reduce |
4962 |
< |
(ConcurrentHashMap<K,V> map, |
4963 |
< |
BiFunction<? super K, ? super V, ? extends U> transformer, |
4964 |
< |
BiFunction<? super U, ? super U, ? extends U> reducer) { |
4965 |
< |
if (transformer == null || reducer == null) |
4966 |
< |
throw new NullPointerException(); |
4967 |
< |
return new MapReduceMappingsTask<K,V,U> |
4968 |
< |
(map, null, -1, null, transformer, reducer); |
4969 |
< |
} |
4970 |
< |
|
4971 |
< |
/** |
4972 |
< |
* Returns a task that when invoked, returns the result of |
4973 |
< |
* accumulating the given transformation of all (key, value) pairs |
4974 |
< |
* using the given reducer to combine values, and the given |
4975 |
< |
* basis as an identity value. |
4976 |
< |
* |
4977 |
< |
* @param map the map |
4978 |
< |
* @param transformer a function returning the transformation |
4979 |
< |
* for an element |
4980 |
< |
* @param basis the identity (initial default value) for the reduction |
4981 |
< |
* @param reducer a commutative associative combining function |
4982 |
< |
* @return the task |
4983 |
< |
*/ |
4984 |
< |
public static <K,V> ForkJoinTask<Double> reduceToDouble |
4985 |
< |
(ConcurrentHashMap<K,V> map, |
4986 |
< |
ToDoubleBiFunction<? super K, ? super V> transformer, |
4987 |
< |
double basis, |
4988 |
< |
DoubleBinaryOperator reducer) { |
4989 |
< |
if (transformer == null || reducer == null) |
4990 |
< |
throw new NullPointerException(); |
4991 |
< |
return new MapReduceMappingsToDoubleTask<K,V> |
4992 |
< |
(map, null, -1, null, transformer, basis, reducer); |
4993 |
< |
} |
4994 |
< |
|
4995 |
< |
/** |
4996 |
< |
* Returns a task that when invoked, returns the result of |
4997 |
< |
* accumulating the given transformation of all (key, value) pairs |
4998 |
< |
* using the given reducer to combine values, and the given |
4999 |
< |
* basis as an identity value. |
5000 |
< |
* |
5001 |
< |
* @param map the map |
5002 |
< |
* @param transformer a function returning the transformation |
5003 |
< |
* for an element |
5004 |
< |
* @param basis the identity (initial default value) for the reduction |
5005 |
< |
* @param reducer a commutative associative combining function |
5006 |
< |
* @return the task |
5007 |
< |
*/ |
5008 |
< |
public static <K,V> ForkJoinTask<Long> reduceToLong |
5009 |
< |
(ConcurrentHashMap<K,V> map, |
5010 |
< |
ToLongBiFunction<? super K, ? super V> transformer, |
5011 |
< |
long basis, |
5012 |
< |
LongBinaryOperator reducer) { |
5013 |
< |
if (transformer == null || reducer == null) |
5014 |
< |
throw new NullPointerException(); |
5015 |
< |
return new MapReduceMappingsToLongTask<K,V> |
5016 |
< |
(map, null, -1, null, transformer, basis, reducer); |
5017 |
< |
} |
5018 |
< |
|
5019 |
< |
/** |
5020 |
< |
* Returns a task that when invoked, returns the result of |
5021 |
< |
* accumulating the given transformation of all (key, value) pairs |
5022 |
< |
* using the given reducer to combine values, and the given |
5023 |
< |
* basis as an identity value. |
5024 |
< |
* |
5025 |
< |
* @param map the map |
5026 |
< |
* @param transformer a function returning the transformation |
5027 |
< |
* for an element |
5028 |
< |
* @param basis the identity (initial default value) for the reduction |
5029 |
< |
* @param reducer a commutative associative combining function |
5030 |
< |
* @return the task |
5031 |
< |
*/ |
5032 |
< |
public static <K,V> ForkJoinTask<Integer> reduceToInt |
5033 |
< |
(ConcurrentHashMap<K,V> map, |
5034 |
< |
ToIntBiFunction<? super K, ? super V> transformer, |
5035 |
< |
int basis, |
5036 |
< |
IntBinaryOperator reducer) { |
5037 |
< |
if (transformer == null || reducer == null) |
5038 |
< |
throw new NullPointerException(); |
5039 |
< |
return new MapReduceMappingsToIntTask<K,V> |
5040 |
< |
(map, null, -1, null, transformer, basis, reducer); |
5041 |
< |
} |
5042 |
< |
|
5043 |
< |
/** |
5044 |
< |
* Returns a task that when invoked, performs the given action |
5045 |
< |
* for each key. |
5046 |
< |
* |
5047 |
< |
* @param map the map |
5048 |
< |
* @param action the action |
5049 |
< |
* @return the task |
5050 |
< |
*/ |
5051 |
< |
public static <K,V> ForkJoinTask<Void> forEachKey |
5052 |
< |
(ConcurrentHashMap<K,V> map, |
5053 |
< |
Consumer<? super K> action) { |
5054 |
< |
if (action == null) throw new NullPointerException(); |
5055 |
< |
return new ForEachKeyTask<K,V>(map, null, -1, action); |
5056 |
< |
} |
5057 |
< |
|
5058 |
< |
/** |
5059 |
< |
* Returns a task that when invoked, performs the given action |
5060 |
< |
* for each non-null transformation of each key. |
5061 |
< |
* |
5062 |
< |
* @param map the map |
5063 |
< |
* @param transformer a function returning the transformation |
5064 |
< |
* for an element, or null if there is no transformation (in |
5065 |
< |
* which case the action is not applied) |
5066 |
< |
* @param action the action |
5067 |
< |
* @return the task |
5068 |
< |
*/ |
5069 |
< |
public static <K,V,U> ForkJoinTask<Void> forEachKey |
5070 |
< |
(ConcurrentHashMap<K,V> map, |
5071 |
< |
Function<? super K, ? extends U> transformer, |
5072 |
< |
Consumer<? super U> action) { |
5073 |
< |
if (transformer == null || action == null) |
5074 |
< |
throw new NullPointerException(); |
5075 |
< |
return new ForEachTransformedKeyTask<K,V,U> |
5076 |
< |
(map, null, -1, transformer, action); |
5077 |
< |
} |
5078 |
< |
|
5079 |
< |
/** |
5080 |
< |
* Returns a task that when invoked, returns a non-null result |
5081 |
< |
* from applying the given search function on each key, or |
5082 |
< |
* null if none. Upon success, further element processing is |
5083 |
< |
* suppressed and the results of any other parallel |
5084 |
< |
* invocations of the search function are ignored. |
5085 |
< |
* |
5086 |
< |
* @param map the map |
5087 |
< |
* @param searchFunction a function returning a non-null |
5088 |
< |
* result on success, else null |
5089 |
< |
* @return the task |
5090 |
< |
*/ |
5091 |
< |
public static <K,V,U> ForkJoinTask<U> searchKeys |
5092 |
< |
(ConcurrentHashMap<K,V> map, |
5093 |
< |
Function<? super K, ? extends U> searchFunction) { |
5094 |
< |
if (searchFunction == null) throw new NullPointerException(); |
5095 |
< |
return new SearchKeysTask<K,V,U> |
5096 |
< |
(map, null, -1, searchFunction, |
5097 |
< |
new AtomicReference<U>()); |
5098 |
< |
} |
5099 |
< |
|
5100 |
< |
/** |
5101 |
< |
* Returns a task that when invoked, returns the result of |
5102 |
< |
* accumulating all keys using the given reducer to combine |
5103 |
< |
* values, or null if none. |
5104 |
< |
* |
5105 |
< |
* @param map the map |
5106 |
< |
* @param reducer a commutative associative combining function |
5107 |
< |
* @return the task |
5108 |
< |
*/ |
5109 |
< |
public static <K,V> ForkJoinTask<K> reduceKeys |
5110 |
< |
(ConcurrentHashMap<K,V> map, |
5111 |
< |
BiFunction<? super K, ? super K, ? extends K> reducer) { |
5112 |
< |
if (reducer == null) throw new NullPointerException(); |
5113 |
< |
return new ReduceKeysTask<K,V> |
5114 |
< |
(map, null, -1, null, reducer); |
5115 |
< |
} |
5116 |
< |
|
5117 |
< |
/** |
5118 |
< |
* Returns a task that when invoked, returns the result of |
5119 |
< |
* accumulating the given transformation of all keys using the given |
5120 |
< |
* reducer to combine values, or null if none. |
5121 |
< |
* |
5122 |
< |
* @param map the map |
5123 |
< |
* @param transformer a function returning the transformation |
5124 |
< |
* for an element, or null if there is no transformation (in |
5125 |
< |
* which case it is not combined) |
5126 |
< |
* @param reducer a commutative associative combining function |
5127 |
< |
* @return the task |
5128 |
< |
*/ |
5129 |
< |
public static <K,V,U> ForkJoinTask<U> reduceKeys |
5130 |
< |
(ConcurrentHashMap<K,V> map, |
5131 |
< |
Function<? super K, ? extends U> transformer, |
5132 |
< |
BiFunction<? super U, ? super U, ? extends U> reducer) { |
5133 |
< |
if (transformer == null || reducer == null) |
5134 |
< |
throw new NullPointerException(); |
5135 |
< |
return new MapReduceKeysTask<K,V,U> |
5136 |
< |
(map, null, -1, null, transformer, reducer); |
5137 |
< |
} |
5138 |
< |
|
5139 |
< |
/** |
5140 |
< |
* Returns a task that when invoked, returns the result of |
5141 |
< |
* accumulating the given transformation of all keys using the given |
5142 |
< |
* reducer to combine values, and the given basis as an |
5143 |
< |
* identity value. |
5144 |
< |
* |
5145 |
< |
* @param map the map |
5146 |
< |
* @param transformer a function returning the transformation |
5147 |
< |
* for an element |
5148 |
< |
* @param basis the identity (initial default value) for the reduction |
5149 |
< |
* @param reducer a commutative associative combining function |
5150 |
< |
* @return the task |
5151 |
< |
*/ |
5152 |
< |
public static <K,V> ForkJoinTask<Double> reduceKeysToDouble |
5153 |
< |
(ConcurrentHashMap<K,V> map, |
5154 |
< |
ToDoubleFunction<? super K> transformer, |
5155 |
< |
double basis, |
5156 |
< |
DoubleBinaryOperator reducer) { |
5157 |
< |
if (transformer == null || reducer == null) |
5158 |
< |
throw new NullPointerException(); |
5159 |
< |
return new MapReduceKeysToDoubleTask<K,V> |
5160 |
< |
(map, null, -1, null, transformer, basis, reducer); |
5161 |
< |
} |
5162 |
< |
|
5163 |
< |
/** |
5164 |
< |
* Returns a task that when invoked, returns the result of |
5165 |
< |
* accumulating the given transformation of all keys using the given |
5166 |
< |
* reducer to combine values, and the given basis as an |
5167 |
< |
* identity value. |
5168 |
< |
* |
5169 |
< |
* @param map the map |
5170 |
< |
* @param transformer a function returning the transformation |
5171 |
< |
* for an element |
5172 |
< |
* @param basis the identity (initial default value) for the reduction |
5173 |
< |
* @param reducer a commutative associative combining function |
5174 |
< |
* @return the task |
5175 |
< |
*/ |
5176 |
< |
public static <K,V> ForkJoinTask<Long> reduceKeysToLong |
5177 |
< |
(ConcurrentHashMap<K,V> map, |
5178 |
< |
ToLongFunction<? super K> transformer, |
5179 |
< |
long basis, |
5180 |
< |
LongBinaryOperator reducer) { |
5181 |
< |
if (transformer == null || reducer == null) |
5182 |
< |
throw new NullPointerException(); |
5183 |
< |
return new MapReduceKeysToLongTask<K,V> |
5184 |
< |
(map, null, -1, null, transformer, basis, reducer); |
5185 |
< |
} |
5186 |
< |
|
5187 |
< |
/** |
5188 |
< |
* Returns a task that when invoked, returns the result of |
5189 |
< |
* accumulating the given transformation of all keys using the given |
5190 |
< |
* reducer to combine values, and the given basis as an |
5191 |
< |
* identity value. |
5192 |
< |
* |
5193 |
< |
* @param map the map |
5194 |
< |
* @param transformer a function returning the transformation |
5195 |
< |
* for an element |
5196 |
< |
* @param basis the identity (initial default value) for the reduction |
5197 |
< |
* @param reducer a commutative associative combining function |
5198 |
< |
* @return the task |
5199 |
< |
*/ |
5200 |
< |
public static <K,V> ForkJoinTask<Integer> reduceKeysToInt |
5201 |
< |
(ConcurrentHashMap<K,V> map, |
5202 |
< |
ToIntFunction<? super K> transformer, |
5203 |
< |
int basis, |
5204 |
< |
IntBinaryOperator reducer) { |
5205 |
< |
if (transformer == null || reducer == null) |
5206 |
< |
throw new NullPointerException(); |
5207 |
< |
return new MapReduceKeysToIntTask<K,V> |
5208 |
< |
(map, null, -1, null, transformer, basis, reducer); |
5209 |
< |
} |
5210 |
< |
|
5211 |
< |
/** |
5212 |
< |
* Returns a task that when invoked, performs the given action |
5213 |
< |
* for each value. |
5214 |
< |
* |
5215 |
< |
* @param map the map |
5216 |
< |
* @param action the action |
5217 |
< |
* @return the task |
5218 |
< |
*/ |
5219 |
< |
public static <K,V> ForkJoinTask<Void> forEachValue |
5220 |
< |
(ConcurrentHashMap<K,V> map, |
5221 |
< |
Consumer<? super V> action) { |
5222 |
< |
if (action == null) throw new NullPointerException(); |
5223 |
< |
return new ForEachValueTask<K,V>(map, null, -1, action); |
5224 |
< |
} |
5225 |
< |
|
5226 |
< |
/** |
5227 |
< |
* Returns a task that when invoked, performs the given action |
5228 |
< |
* for each non-null transformation of each value. |
5229 |
< |
* |
5230 |
< |
* @param map the map |
5231 |
< |
* @param transformer a function returning the transformation |
5232 |
< |
* for an element, or null if there is no transformation (in |
5233 |
< |
* which case the action is not applied) |
5234 |
< |
* @param action the action |
5235 |
< |
* @return the task |
5236 |
< |
*/ |
5237 |
< |
public static <K,V,U> ForkJoinTask<Void> forEachValue |
5238 |
< |
(ConcurrentHashMap<K,V> map, |
5239 |
< |
Function<? super V, ? extends U> transformer, |
5240 |
< |
Consumer<? super U> action) { |
5241 |
< |
if (transformer == null || action == null) |
5242 |
< |
throw new NullPointerException(); |
5243 |
< |
return new ForEachTransformedValueTask<K,V,U> |
5244 |
< |
(map, null, -1, transformer, action); |
5245 |
< |
} |
5246 |
< |
|
5247 |
< |
/** |
5248 |
< |
* Returns a task that when invoked, returns a non-null result |
5249 |
< |
* from applying the given search function on each value, or |
5250 |
< |
* null if none. Upon success, further element processing is |
5251 |
< |
* suppressed and the results of any other parallel |
5252 |
< |
* invocations of the search function are ignored. |
5253 |
< |
* |
5254 |
< |
* @param map the map |
5255 |
< |
* @param searchFunction a function returning a non-null |
5256 |
< |
* result on success, else null |
5257 |
< |
* @return the task |
5258 |
< |
*/ |
5259 |
< |
public static <K,V,U> ForkJoinTask<U> searchValues |
5260 |
< |
(ConcurrentHashMap<K,V> map, |
5261 |
< |
Function<? super V, ? extends U> searchFunction) { |
5262 |
< |
if (searchFunction == null) throw new NullPointerException(); |
5263 |
< |
return new SearchValuesTask<K,V,U> |
5264 |
< |
(map, null, -1, searchFunction, |
5265 |
< |
new AtomicReference<U>()); |
5266 |
< |
} |
5267 |
< |
|
5268 |
< |
/** |
5269 |
< |
* Returns a task that when invoked, returns the result of |
5270 |
< |
* accumulating all values using the given reducer to combine |
5271 |
< |
* values, or null if none. |
5272 |
< |
* |
5273 |
< |
* @param map the map |
5274 |
< |
* @param reducer a commutative associative combining function |
5275 |
< |
* @return the task |
5276 |
< |
*/ |
5277 |
< |
public static <K,V> ForkJoinTask<V> reduceValues |
5278 |
< |
(ConcurrentHashMap<K,V> map, |
5279 |
< |
BiFunction<? super V, ? super V, ? extends V> reducer) { |
5280 |
< |
if (reducer == null) throw new NullPointerException(); |
5281 |
< |
return new ReduceValuesTask<K,V> |
5282 |
< |
(map, null, -1, null, reducer); |
5283 |
< |
} |
5284 |
< |
|
5285 |
< |
/** |
5286 |
< |
* Returns a task that when invoked, returns the result of |
5287 |
< |
* accumulating the given transformation of all values using the |
5288 |
< |
* given reducer to combine values, or null if none. |
5289 |
< |
* |
5290 |
< |
* @param map the map |
5291 |
< |
* @param transformer a function returning the transformation |
5292 |
< |
* for an element, or null if there is no transformation (in |
5293 |
< |
* which case it is not combined) |
5294 |
< |
* @param reducer a commutative associative combining function |
5295 |
< |
* @return the task |
5296 |
< |
*/ |
5297 |
< |
public static <K,V,U> ForkJoinTask<U> reduceValues |
5298 |
< |
(ConcurrentHashMap<K,V> map, |
5299 |
< |
Function<? super V, ? extends U> transformer, |
5300 |
< |
BiFunction<? super U, ? super U, ? extends U> reducer) { |
5301 |
< |
if (transformer == null || reducer == null) |
5302 |
< |
throw new NullPointerException(); |
5303 |
< |
return new MapReduceValuesTask<K,V,U> |
5304 |
< |
(map, null, -1, null, transformer, reducer); |
5305 |
< |
} |
5306 |
< |
|
5307 |
< |
/** |
5308 |
< |
* Returns a task that when invoked, returns the result of |
5309 |
< |
* accumulating the given transformation of all values using the |
5310 |
< |
* given reducer to combine values, and the given basis as an |
5311 |
< |
* identity value. |
5312 |
< |
* |
5313 |
< |
* @param map the map |
5314 |
< |
* @param transformer a function returning the transformation |
5315 |
< |
* for an element |
5316 |
< |
* @param basis the identity (initial default value) for the reduction |
5317 |
< |
* @param reducer a commutative associative combining function |
5318 |
< |
* @return the task |
5319 |
< |
*/ |
5320 |
< |
public static <K,V> ForkJoinTask<Double> reduceValuesToDouble |
5321 |
< |
(ConcurrentHashMap<K,V> map, |
5322 |
< |
ToDoubleFunction<? super V> transformer, |
5323 |
< |
double basis, |
5324 |
< |
DoubleBinaryOperator reducer) { |
5325 |
< |
if (transformer == null || reducer == null) |
5326 |
< |
throw new NullPointerException(); |
5327 |
< |
return new MapReduceValuesToDoubleTask<K,V> |
5328 |
< |
(map, null, -1, null, transformer, basis, reducer); |
4735 |
> |
public final int hashCode() { |
4736 |
> |
int h = 0; |
4737 |
> |
Node<K,V>[] t; |
4738 |
> |
if ((t = map.table) != null) { |
4739 |
> |
Traverser<K,V> it = new Traverser<K,V>(t, t.length, 0, t.length); |
4740 |
> |
for (Node<K,V> p; (p = it.advance()) != null; ) { |
4741 |
> |
h += p.hashCode(); |
4742 |
> |
} |
4743 |
> |
} |
4744 |
> |
return h; |
4745 |
|
} |
4746 |
|
|
4747 |
< |
/** |
4748 |
< |
* Returns a task that when invoked, returns the result of |
4749 |
< |
* accumulating the given transformation of all values using the |
4750 |
< |
* given reducer to combine values, and the given basis as an |
4751 |
< |
* identity value. |
5336 |
< |
* |
5337 |
< |
* @param map the map |
5338 |
< |
* @param transformer a function returning the transformation |
5339 |
< |
* for an element |
5340 |
< |
* @param basis the identity (initial default value) for the reduction |
5341 |
< |
* @param reducer a commutative associative combining function |
5342 |
< |
* @return the task |
5343 |
< |
*/ |
5344 |
< |
public static <K,V> ForkJoinTask<Long> reduceValuesToLong |
5345 |
< |
(ConcurrentHashMap<K,V> map, |
5346 |
< |
ToLongFunction<? super V> transformer, |
5347 |
< |
long basis, |
5348 |
< |
LongBinaryOperator reducer) { |
5349 |
< |
if (transformer == null || reducer == null) |
5350 |
< |
throw new NullPointerException(); |
5351 |
< |
return new MapReduceValuesToLongTask<K,V> |
5352 |
< |
(map, null, -1, null, transformer, basis, reducer); |
4747 |
> |
public final boolean equals(Object o) { |
4748 |
> |
Set<?> c; |
4749 |
> |
return ((o instanceof Set) && |
4750 |
> |
((c = (Set<?>)o) == this || |
4751 |
> |
(containsAll(c) && c.containsAll(this)))); |
4752 |
|
} |
4753 |
|
|
4754 |
< |
/** |
4755 |
< |
* Returns a task that when invoked, returns the result of |
4756 |
< |
* accumulating the given transformation of all values using the |
4757 |
< |
* given reducer to combine values, and the given basis as an |
4758 |
< |
* identity value. |
4759 |
< |
* |
5361 |
< |
* @param map the map |
5362 |
< |
* @param transformer a function returning the transformation |
5363 |
< |
* for an element |
5364 |
< |
* @param basis the identity (initial default value) for the reduction |
5365 |
< |
* @param reducer a commutative associative combining function |
5366 |
< |
* @return the task |
5367 |
< |
*/ |
5368 |
< |
public static <K,V> ForkJoinTask<Integer> reduceValuesToInt |
5369 |
< |
(ConcurrentHashMap<K,V> map, |
5370 |
< |
ToIntFunction<? super V> transformer, |
5371 |
< |
int basis, |
5372 |
< |
IntBinaryOperator reducer) { |
5373 |
< |
if (transformer == null || reducer == null) |
5374 |
< |
throw new NullPointerException(); |
5375 |
< |
return new MapReduceValuesToIntTask<K,V> |
5376 |
< |
(map, null, -1, null, transformer, basis, reducer); |
4754 |
> |
public Spliterator<Map.Entry<K,V>> spliterator() { |
4755 |
> |
Node<K,V>[] t; |
4756 |
> |
ConcurrentHashMap<K,V> m = map; |
4757 |
> |
long n = m.sumCount(); |
4758 |
> |
int f = (t = m.table) == null ? 0 : t.length; |
4759 |
> |
return new EntrySpliterator<K,V>(t, f, 0, f, n < 0L ? 0L : n, m); |
4760 |
|
} |
4761 |
|
|
4762 |
< |
/** |
5380 |
< |
* Returns a task that when invoked, perform the given action |
5381 |
< |
* for each entry. |
5382 |
< |
* |
5383 |
< |
* @param map the map |
5384 |
< |
* @param action the action |
5385 |
< |
* @return the task |
5386 |
< |
*/ |
5387 |
< |
public static <K,V> ForkJoinTask<Void> forEachEntry |
5388 |
< |
(ConcurrentHashMap<K,V> map, |
5389 |
< |
Consumer<? super Map.Entry<K,V>> action) { |
4762 |
> |
public void forEach(Consumer<? super Map.Entry<K,V>> action) { |
4763 |
|
if (action == null) throw new NullPointerException(); |
4764 |
< |
return new ForEachEntryTask<K,V>(map, null, -1, action); |
4765 |
< |
} |
4766 |
< |
|
4767 |
< |
/** |
4768 |
< |
* Returns a task that when invoked, perform the given action |
4769 |
< |
* for each non-null transformation of each entry. |
5397 |
< |
* |
5398 |
< |
* @param map the map |
5399 |
< |
* @param transformer a function returning the transformation |
5400 |
< |
* for an element, or null if there is no transformation (in |
5401 |
< |
* which case the action is not applied) |
5402 |
< |
* @param action the action |
5403 |
< |
* @return the task |
5404 |
< |
*/ |
5405 |
< |
public static <K,V,U> ForkJoinTask<Void> forEachEntry |
5406 |
< |
(ConcurrentHashMap<K,V> map, |
5407 |
< |
Function<Map.Entry<K,V>, ? extends U> transformer, |
5408 |
< |
Consumer<? super U> action) { |
5409 |
< |
if (transformer == null || action == null) |
5410 |
< |
throw new NullPointerException(); |
5411 |
< |
return new ForEachTransformedEntryTask<K,V,U> |
5412 |
< |
(map, null, -1, transformer, action); |
5413 |
< |
} |
5414 |
< |
|
5415 |
< |
/** |
5416 |
< |
* Returns a task that when invoked, returns a non-null result |
5417 |
< |
* from applying the given search function on each entry, or |
5418 |
< |
* null if none. Upon success, further element processing is |
5419 |
< |
* suppressed and the results of any other parallel |
5420 |
< |
* invocations of the search function are ignored. |
5421 |
< |
* |
5422 |
< |
* @param map the map |
5423 |
< |
* @param searchFunction a function returning a non-null |
5424 |
< |
* result on success, else null |
5425 |
< |
* @return the task |
5426 |
< |
*/ |
5427 |
< |
public static <K,V,U> ForkJoinTask<U> searchEntries |
5428 |
< |
(ConcurrentHashMap<K,V> map, |
5429 |
< |
Function<Map.Entry<K,V>, ? extends U> searchFunction) { |
5430 |
< |
if (searchFunction == null) throw new NullPointerException(); |
5431 |
< |
return new SearchEntriesTask<K,V,U> |
5432 |
< |
(map, null, -1, searchFunction, |
5433 |
< |
new AtomicReference<U>()); |
4764 |
> |
Node<K,V>[] t; |
4765 |
> |
if ((t = map.table) != null) { |
4766 |
> |
Traverser<K,V> it = new Traverser<K,V>(t, t.length, 0, t.length); |
4767 |
> |
for (Node<K,V> p; (p = it.advance()) != null; ) |
4768 |
> |
action.accept(new MapEntry<K,V>(p.key, p.val, map)); |
4769 |
> |
} |
4770 |
|
} |
4771 |
|
|
4772 |
< |
/** |
5437 |
< |
* Returns a task that when invoked, returns the result of |
5438 |
< |
* accumulating all entries using the given reducer to combine |
5439 |
< |
* values, or null if none. |
5440 |
< |
* |
5441 |
< |
* @param map the map |
5442 |
< |
* @param reducer a commutative associative combining function |
5443 |
< |
* @return the task |
5444 |
< |
*/ |
5445 |
< |
public static <K,V> ForkJoinTask<Map.Entry<K,V>> reduceEntries |
5446 |
< |
(ConcurrentHashMap<K,V> map, |
5447 |
< |
BiFunction<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) { |
5448 |
< |
if (reducer == null) throw new NullPointerException(); |
5449 |
< |
return new ReduceEntriesTask<K,V> |
5450 |
< |
(map, null, -1, null, reducer); |
5451 |
< |
} |
4772 |
> |
} |
4773 |
|
|
4774 |
< |
/** |
5454 |
< |
* Returns a task that when invoked, returns the result of |
5455 |
< |
* accumulating the given transformation of all entries using the |
5456 |
< |
* given reducer to combine values, or null if none. |
5457 |
< |
* |
5458 |
< |
* @param map the map |
5459 |
< |
* @param transformer a function returning the transformation |
5460 |
< |
* for an element, or null if there is no transformation (in |
5461 |
< |
* which case it is not combined) |
5462 |
< |
* @param reducer a commutative associative combining function |
5463 |
< |
* @return the task |
5464 |
< |
*/ |
5465 |
< |
public static <K,V,U> ForkJoinTask<U> reduceEntries |
5466 |
< |
(ConcurrentHashMap<K,V> map, |
5467 |
< |
Function<Map.Entry<K,V>, ? extends U> transformer, |
5468 |
< |
BiFunction<? super U, ? super U, ? extends U> reducer) { |
5469 |
< |
if (transformer == null || reducer == null) |
5470 |
< |
throw new NullPointerException(); |
5471 |
< |
return new MapReduceEntriesTask<K,V,U> |
5472 |
< |
(map, null, -1, null, transformer, reducer); |
5473 |
< |
} |
4774 |
> |
// ------------------------------------------------------- |
4775 |
|
|
4776 |
< |
/** |
4777 |
< |
* Returns a task that when invoked, returns the result of |
4778 |
< |
* accumulating the given transformation of all entries using the |
4779 |
< |
* given reducer to combine values, and the given basis as an |
4780 |
< |
* identity value. |
4781 |
< |
* |
4782 |
< |
* @param map the map |
4783 |
< |
* @param transformer a function returning the transformation |
4784 |
< |
* for an element |
4785 |
< |
* @param basis the identity (initial default value) for the reduction |
4786 |
< |
* @param reducer a commutative associative combining function |
4787 |
< |
* @return the task |
4788 |
< |
*/ |
4789 |
< |
public static <K,V> ForkJoinTask<Double> reduceEntriesToDouble |
4790 |
< |
(ConcurrentHashMap<K,V> map, |
4791 |
< |
ToDoubleFunction<Map.Entry<K,V>> transformer, |
4792 |
< |
double basis, |
4793 |
< |
DoubleBinaryOperator reducer) { |
4794 |
< |
if (transformer == null || reducer == null) |
4795 |
< |
throw new NullPointerException(); |
4796 |
< |
return new MapReduceEntriesToDoubleTask<K,V> |
4797 |
< |
(map, null, -1, null, transformer, basis, reducer); |
4776 |
> |
/** |
4777 |
> |
* Base class for bulk tasks. Repeats some fields and code from |
4778 |
> |
* class Traverser, because we need to subclass CountedCompleter. |
4779 |
> |
*/ |
4780 |
> |
@SuppressWarnings("serial") |
4781 |
> |
abstract static class BulkTask<K,V,R> extends CountedCompleter<R> { |
4782 |
> |
Node<K,V>[] tab; // same as Traverser |
4783 |
> |
Node<K,V> next; |
4784 |
> |
TableStack<K,V> stack, spare; |
4785 |
> |
int index; |
4786 |
> |
int baseIndex; |
4787 |
> |
int baseLimit; |
4788 |
> |
final int baseSize; |
4789 |
> |
int batch; // split control |
4790 |
> |
|
4791 |
> |
BulkTask(BulkTask<K,V,?> par, int b, int i, int f, Node<K,V>[] t) { |
4792 |
> |
super(par); |
4793 |
> |
this.batch = b; |
4794 |
> |
this.index = this.baseIndex = i; |
4795 |
> |
if ((this.tab = t) == null) |
4796 |
> |
this.baseSize = this.baseLimit = 0; |
4797 |
> |
else if (par == null) |
4798 |
> |
this.baseSize = this.baseLimit = t.length; |
4799 |
> |
else { |
4800 |
> |
this.baseLimit = f; |
4801 |
> |
this.baseSize = par.baseSize; |
4802 |
> |
} |
4803 |
|
} |
4804 |
|
|
4805 |
|
/** |
4806 |
< |
* Returns a task that when invoked, returns the result of |
5501 |
< |
* accumulating the given transformation of all entries using the |
5502 |
< |
* given reducer to combine values, and the given basis as an |
5503 |
< |
* identity value. |
5504 |
< |
* |
5505 |
< |
* @param map the map |
5506 |
< |
* @param transformer a function returning the transformation |
5507 |
< |
* for an element |
5508 |
< |
* @param basis the identity (initial default value) for the reduction |
5509 |
< |
* @param reducer a commutative associative combining function |
5510 |
< |
* @return the task |
4806 |
> |
* Same as Traverser version |
4807 |
|
*/ |
4808 |
< |
public static <K,V> ForkJoinTask<Long> reduceEntriesToLong |
4809 |
< |
(ConcurrentHashMap<K,V> map, |
4810 |
< |
ToLongFunction<Map.Entry<K,V>> transformer, |
4811 |
< |
long basis, |
4812 |
< |
LongBinaryOperator reducer) { |
4813 |
< |
if (transformer == null || reducer == null) |
4814 |
< |
throw new NullPointerException(); |
4815 |
< |
return new MapReduceEntriesToLongTask<K,V> |
4816 |
< |
(map, null, -1, null, transformer, basis, reducer); |
4808 |
> |
final Node<K,V> advance() { |
4809 |
> |
Node<K,V> e; |
4810 |
> |
if ((e = next) != null) |
4811 |
> |
e = e.next; |
4812 |
> |
for (;;) { |
4813 |
> |
Node<K,V>[] t; int i, n; |
4814 |
> |
if (e != null) |
4815 |
> |
return next = e; |
4816 |
> |
if (baseIndex >= baseLimit || (t = tab) == null || |
4817 |
> |
(n = t.length) <= (i = index) || i < 0) |
4818 |
> |
return next = null; |
4819 |
> |
if ((e = tabAt(t, i)) != null && e.hash < 0) { |
4820 |
> |
if (e instanceof ForwardingNode) { |
4821 |
> |
tab = ((ForwardingNode<K,V>)e).nextTable; |
4822 |
> |
e = null; |
4823 |
> |
pushState(t, i, n); |
4824 |
> |
continue; |
4825 |
> |
} |
4826 |
> |
else if (e instanceof TreeBin) |
4827 |
> |
e = ((TreeBin<K,V>)e).first; |
4828 |
> |
else |
4829 |
> |
e = null; |
4830 |
> |
} |
4831 |
> |
if (stack != null) |
4832 |
> |
recoverState(n); |
4833 |
> |
else if ((index = i + baseSize) >= n) |
4834 |
> |
index = ++baseIndex; |
4835 |
> |
} |
4836 |
|
} |
4837 |
|
|
4838 |
< |
/** |
4839 |
< |
* Returns a task that when invoked, returns the result of |
4840 |
< |
* accumulating the given transformation of all entries using the |
4841 |
< |
* given reducer to combine values, and the given basis as an |
4842 |
< |
* identity value. |
4843 |
< |
* |
4844 |
< |
* @param map the map |
4845 |
< |
* @param transformer a function returning the transformation |
4846 |
< |
* for an element |
4847 |
< |
* @param basis the identity (initial default value) for the reduction |
4848 |
< |
* @param reducer a commutative associative combining function |
4849 |
< |
* @return the task |
4850 |
< |
*/ |
4851 |
< |
public static <K,V> ForkJoinTask<Integer> reduceEntriesToInt |
4852 |
< |
(ConcurrentHashMap<K,V> map, |
4853 |
< |
ToIntFunction<Map.Entry<K,V>> transformer, |
4854 |
< |
int basis, |
4855 |
< |
IntBinaryOperator reducer) { |
4856 |
< |
if (transformer == null || reducer == null) |
4857 |
< |
throw new NullPointerException(); |
4858 |
< |
return new MapReduceEntriesToIntTask<K,V> |
4859 |
< |
(map, null, -1, null, transformer, basis, reducer); |
4838 |
> |
private void pushState(Node<K,V>[] t, int i, int n) { |
4839 |
> |
TableStack<K,V> s = spare; |
4840 |
> |
if (s != null) |
4841 |
> |
spare = s.next; |
4842 |
> |
else |
4843 |
> |
s = new TableStack<K,V>(); |
4844 |
> |
s.tab = t; |
4845 |
> |
s.length = n; |
4846 |
> |
s.index = i; |
4847 |
> |
s.next = stack; |
4848 |
> |
stack = s; |
4849 |
> |
} |
4850 |
> |
|
4851 |
> |
private void recoverState(int n) { |
4852 |
> |
TableStack<K,V> s; int len; |
4853 |
> |
while ((s = stack) != null && (index += (len = s.length)) >= n) { |
4854 |
> |
n = len; |
4855 |
> |
index = s.index; |
4856 |
> |
tab = s.tab; |
4857 |
> |
s.tab = null; |
4858 |
> |
TableStack<K,V> next = s.next; |
4859 |
> |
s.next = spare; // save for reuse |
4860 |
> |
stack = next; |
4861 |
> |
spare = s; |
4862 |
> |
} |
4863 |
> |
if (s == null && (index += baseSize) >= n) |
4864 |
> |
index = ++baseIndex; |
4865 |
|
} |
4866 |
|
} |
4867 |
|
|
5548 |
– |
// ------------------------------------------------------- |
5549 |
– |
|
4868 |
|
/* |
4869 |
|
* Task classes. Coded in a regular but ugly format/style to |
4870 |
|
* simplify checks that each variant differs in the right way from |
4872 |
|
* that we've already null-checked task arguments, so we force |
4873 |
|
* simplest hoisted bypass to help avoid convoluted traps. |
4874 |
|
*/ |
4875 |
< |
|
4876 |
< |
@SuppressWarnings("serial") static final class ForEachKeyTask<K,V> |
4877 |
< |
extends Traverser<K,V,Void> { |
4875 |
> |
@SuppressWarnings("serial") |
4876 |
> |
static final class ForEachKeyTask<K,V> |
4877 |
> |
extends BulkTask<K,V,Void> { |
4878 |
|
final Consumer<? super K> action; |
4879 |
|
ForEachKeyTask |
4880 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
4880 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
4881 |
|
Consumer<? super K> action) { |
4882 |
< |
super(m, p, b); |
4882 |
> |
super(p, b, i, f, t); |
4883 |
|
this.action = action; |
4884 |
|
} |
4885 |
|
public final void compute() { |
4886 |
|
final Consumer<? super K> action; |
4887 |
|
if ((action = this.action) != null) { |
4888 |
< |
for (int b; (b = preSplit()) > 0;) |
4889 |
< |
new ForEachKeyTask<K,V>(map, this, b, action).fork(); |
4890 |
< |
while (advance() != null) |
4891 |
< |
action.accept(nextKey); |
4888 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
4889 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
4890 |
> |
addToPendingCount(1); |
4891 |
> |
new ForEachKeyTask<K,V> |
4892 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
4893 |
> |
action).fork(); |
4894 |
> |
} |
4895 |
> |
for (Node<K,V> p; (p = advance()) != null;) |
4896 |
> |
action.accept(p.key); |
4897 |
|
propagateCompletion(); |
4898 |
|
} |
4899 |
|
} |
4900 |
|
} |
4901 |
|
|
4902 |
< |
@SuppressWarnings("serial") static final class ForEachValueTask<K,V> |
4903 |
< |
extends Traverser<K,V,Void> { |
4902 |
> |
@SuppressWarnings("serial") |
4903 |
> |
static final class ForEachValueTask<K,V> |
4904 |
> |
extends BulkTask<K,V,Void> { |
4905 |
|
final Consumer<? super V> action; |
4906 |
|
ForEachValueTask |
4907 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
4907 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
4908 |
|
Consumer<? super V> action) { |
4909 |
< |
super(m, p, b); |
4909 |
> |
super(p, b, i, f, t); |
4910 |
|
this.action = action; |
4911 |
|
} |
4912 |
|
public final void compute() { |
4913 |
|
final Consumer<? super V> action; |
4914 |
|
if ((action = this.action) != null) { |
4915 |
< |
for (int b; (b = preSplit()) > 0;) |
4916 |
< |
new ForEachValueTask<K,V>(map, this, b, action).fork(); |
4917 |
< |
V v; |
4918 |
< |
while ((v = advance()) != null) |
4919 |
< |
action.accept(v); |
4915 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
4916 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
4917 |
> |
addToPendingCount(1); |
4918 |
> |
new ForEachValueTask<K,V> |
4919 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
4920 |
> |
action).fork(); |
4921 |
> |
} |
4922 |
> |
for (Node<K,V> p; (p = advance()) != null;) |
4923 |
> |
action.accept(p.val); |
4924 |
|
propagateCompletion(); |
4925 |
|
} |
4926 |
|
} |
4927 |
|
} |
4928 |
|
|
4929 |
< |
@SuppressWarnings("serial") static final class ForEachEntryTask<K,V> |
4930 |
< |
extends Traverser<K,V,Void> { |
4929 |
> |
@SuppressWarnings("serial") |
4930 |
> |
static final class ForEachEntryTask<K,V> |
4931 |
> |
extends BulkTask<K,V,Void> { |
4932 |
|
final Consumer<? super Entry<K,V>> action; |
4933 |
|
ForEachEntryTask |
4934 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
4934 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
4935 |
|
Consumer<? super Entry<K,V>> action) { |
4936 |
< |
super(m, p, b); |
4936 |
> |
super(p, b, i, f, t); |
4937 |
|
this.action = action; |
4938 |
|
} |
4939 |
|
public final void compute() { |
4940 |
|
final Consumer<? super Entry<K,V>> action; |
4941 |
|
if ((action = this.action) != null) { |
4942 |
< |
for (int b; (b = preSplit()) > 0;) |
4943 |
< |
new ForEachEntryTask<K,V>(map, this, b, action).fork(); |
4944 |
< |
V v; |
4945 |
< |
while ((v = advance()) != null) |
4946 |
< |
action.accept(entryFor(nextKey, v)); |
4942 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
4943 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
4944 |
> |
addToPendingCount(1); |
4945 |
> |
new ForEachEntryTask<K,V> |
4946 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
4947 |
> |
action).fork(); |
4948 |
> |
} |
4949 |
> |
for (Node<K,V> p; (p = advance()) != null; ) |
4950 |
> |
action.accept(p); |
4951 |
|
propagateCompletion(); |
4952 |
|
} |
4953 |
|
} |
4954 |
|
} |
4955 |
|
|
4956 |
< |
@SuppressWarnings("serial") static final class ForEachMappingTask<K,V> |
4957 |
< |
extends Traverser<K,V,Void> { |
4956 |
> |
@SuppressWarnings("serial") |
4957 |
> |
static final class ForEachMappingTask<K,V> |
4958 |
> |
extends BulkTask<K,V,Void> { |
4959 |
|
final BiConsumer<? super K, ? super V> action; |
4960 |
|
ForEachMappingTask |
4961 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
4961 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
4962 |
|
BiConsumer<? super K,? super V> action) { |
4963 |
< |
super(m, p, b); |
4963 |
> |
super(p, b, i, f, t); |
4964 |
|
this.action = action; |
4965 |
|
} |
4966 |
|
public final void compute() { |
4967 |
|
final BiConsumer<? super K, ? super V> action; |
4968 |
|
if ((action = this.action) != null) { |
4969 |
< |
for (int b; (b = preSplit()) > 0;) |
4970 |
< |
new ForEachMappingTask<K,V>(map, this, b, action).fork(); |
4971 |
< |
V v; |
4972 |
< |
while ((v = advance()) != null) |
4973 |
< |
action.accept(nextKey, v); |
4969 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
4970 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
4971 |
> |
addToPendingCount(1); |
4972 |
> |
new ForEachMappingTask<K,V> |
4973 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
4974 |
> |
action).fork(); |
4975 |
> |
} |
4976 |
> |
for (Node<K,V> p; (p = advance()) != null; ) |
4977 |
> |
action.accept(p.key, p.val); |
4978 |
|
propagateCompletion(); |
4979 |
|
} |
4980 |
|
} |
4981 |
|
} |
4982 |
|
|
4983 |
< |
@SuppressWarnings("serial") static final class ForEachTransformedKeyTask<K,V,U> |
4984 |
< |
extends Traverser<K,V,Void> { |
4983 |
> |
@SuppressWarnings("serial") |
4984 |
> |
static final class ForEachTransformedKeyTask<K,V,U> |
4985 |
> |
extends BulkTask<K,V,Void> { |
4986 |
|
final Function<? super K, ? extends U> transformer; |
4987 |
|
final Consumer<? super U> action; |
4988 |
|
ForEachTransformedKeyTask |
4989 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
4989 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
4990 |
|
Function<? super K, ? extends U> transformer, Consumer<? super U> action) { |
4991 |
< |
super(m, p, b); |
4991 |
> |
super(p, b, i, f, t); |
4992 |
|
this.transformer = transformer; this.action = action; |
4993 |
|
} |
4994 |
|
public final void compute() { |
4996 |
|
final Consumer<? super U> action; |
4997 |
|
if ((transformer = this.transformer) != null && |
4998 |
|
(action = this.action) != null) { |
4999 |
< |
for (int b; (b = preSplit()) > 0;) |
4999 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
5000 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
5001 |
> |
addToPendingCount(1); |
5002 |
|
new ForEachTransformedKeyTask<K,V,U> |
5003 |
< |
(map, this, b, transformer, action).fork(); |
5004 |
< |
U u; |
5005 |
< |
while (advance() != null) { |
5006 |
< |
if ((u = transformer.apply(nextKey)) != null) |
5003 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
5004 |
> |
transformer, action).fork(); |
5005 |
> |
} |
5006 |
> |
for (Node<K,V> p; (p = advance()) != null; ) { |
5007 |
> |
U u; |
5008 |
> |
if ((u = transformer.apply(p.key)) != null) |
5009 |
|
action.accept(u); |
5010 |
|
} |
5011 |
|
propagateCompletion(); |
5013 |
|
} |
5014 |
|
} |
5015 |
|
|
5016 |
< |
@SuppressWarnings("serial") static final class ForEachTransformedValueTask<K,V,U> |
5017 |
< |
extends Traverser<K,V,Void> { |
5016 |
> |
@SuppressWarnings("serial") |
5017 |
> |
static final class ForEachTransformedValueTask<K,V,U> |
5018 |
> |
extends BulkTask<K,V,Void> { |
5019 |
|
final Function<? super V, ? extends U> transformer; |
5020 |
|
final Consumer<? super U> action; |
5021 |
|
ForEachTransformedValueTask |
5022 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
5022 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
5023 |
|
Function<? super V, ? extends U> transformer, Consumer<? super U> action) { |
5024 |
< |
super(m, p, b); |
5024 |
> |
super(p, b, i, f, t); |
5025 |
|
this.transformer = transformer; this.action = action; |
5026 |
|
} |
5027 |
|
public final void compute() { |
5029 |
|
final Consumer<? super U> action; |
5030 |
|
if ((transformer = this.transformer) != null && |
5031 |
|
(action = this.action) != null) { |
5032 |
< |
for (int b; (b = preSplit()) > 0;) |
5032 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
5033 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
5034 |
> |
addToPendingCount(1); |
5035 |
|
new ForEachTransformedValueTask<K,V,U> |
5036 |
< |
(map, this, b, transformer, action).fork(); |
5037 |
< |
V v; U u; |
5038 |
< |
while ((v = advance()) != null) { |
5039 |
< |
if ((u = transformer.apply(v)) != null) |
5036 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
5037 |
> |
transformer, action).fork(); |
5038 |
> |
} |
5039 |
> |
for (Node<K,V> p; (p = advance()) != null; ) { |
5040 |
> |
U u; |
5041 |
> |
if ((u = transformer.apply(p.val)) != null) |
5042 |
|
action.accept(u); |
5043 |
|
} |
5044 |
|
propagateCompletion(); |
5046 |
|
} |
5047 |
|
} |
5048 |
|
|
5049 |
< |
@SuppressWarnings("serial") static final class ForEachTransformedEntryTask<K,V,U> |
5050 |
< |
extends Traverser<K,V,Void> { |
5049 |
> |
@SuppressWarnings("serial") |
5050 |
> |
static final class ForEachTransformedEntryTask<K,V,U> |
5051 |
> |
extends BulkTask<K,V,Void> { |
5052 |
|
final Function<Map.Entry<K,V>, ? extends U> transformer; |
5053 |
|
final Consumer<? super U> action; |
5054 |
|
ForEachTransformedEntryTask |
5055 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
5055 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
5056 |
|
Function<Map.Entry<K,V>, ? extends U> transformer, Consumer<? super U> action) { |
5057 |
< |
super(m, p, b); |
5057 |
> |
super(p, b, i, f, t); |
5058 |
|
this.transformer = transformer; this.action = action; |
5059 |
|
} |
5060 |
|
public final void compute() { |
5062 |
|
final Consumer<? super U> action; |
5063 |
|
if ((transformer = this.transformer) != null && |
5064 |
|
(action = this.action) != null) { |
5065 |
< |
for (int b; (b = preSplit()) > 0;) |
5065 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
5066 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
5067 |
> |
addToPendingCount(1); |
5068 |
|
new ForEachTransformedEntryTask<K,V,U> |
5069 |
< |
(map, this, b, transformer, action).fork(); |
5070 |
< |
V v; U u; |
5071 |
< |
while ((v = advance()) != null) { |
5072 |
< |
if ((u = transformer.apply(entryFor(nextKey, |
5073 |
< |
v))) != null) |
5069 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
5070 |
> |
transformer, action).fork(); |
5071 |
> |
} |
5072 |
> |
for (Node<K,V> p; (p = advance()) != null; ) { |
5073 |
> |
U u; |
5074 |
> |
if ((u = transformer.apply(p)) != null) |
5075 |
|
action.accept(u); |
5076 |
|
} |
5077 |
|
propagateCompletion(); |
5079 |
|
} |
5080 |
|
} |
5081 |
|
|
5082 |
< |
@SuppressWarnings("serial") static final class ForEachTransformedMappingTask<K,V,U> |
5083 |
< |
extends Traverser<K,V,Void> { |
5082 |
> |
@SuppressWarnings("serial") |
5083 |
> |
static final class ForEachTransformedMappingTask<K,V,U> |
5084 |
> |
extends BulkTask<K,V,Void> { |
5085 |
|
final BiFunction<? super K, ? super V, ? extends U> transformer; |
5086 |
|
final Consumer<? super U> action; |
5087 |
|
ForEachTransformedMappingTask |
5088 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
5088 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
5089 |
|
BiFunction<? super K, ? super V, ? extends U> transformer, |
5090 |
|
Consumer<? super U> action) { |
5091 |
< |
super(m, p, b); |
5091 |
> |
super(p, b, i, f, t); |
5092 |
|
this.transformer = transformer; this.action = action; |
5093 |
|
} |
5094 |
|
public final void compute() { |
5096 |
|
final Consumer<? super U> action; |
5097 |
|
if ((transformer = this.transformer) != null && |
5098 |
|
(action = this.action) != null) { |
5099 |
< |
for (int b; (b = preSplit()) > 0;) |
5099 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
5100 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
5101 |
> |
addToPendingCount(1); |
5102 |
|
new ForEachTransformedMappingTask<K,V,U> |
5103 |
< |
(map, this, b, transformer, action).fork(); |
5104 |
< |
V v; U u; |
5105 |
< |
while ((v = advance()) != null) { |
5106 |
< |
if ((u = transformer.apply(nextKey, v)) != null) |
5103 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
5104 |
> |
transformer, action).fork(); |
5105 |
> |
} |
5106 |
> |
for (Node<K,V> p; (p = advance()) != null; ) { |
5107 |
> |
U u; |
5108 |
> |
if ((u = transformer.apply(p.key, p.val)) != null) |
5109 |
|
action.accept(u); |
5110 |
|
} |
5111 |
|
propagateCompletion(); |
5113 |
|
} |
5114 |
|
} |
5115 |
|
|
5116 |
< |
@SuppressWarnings("serial") static final class SearchKeysTask<K,V,U> |
5117 |
< |
extends Traverser<K,V,U> { |
5116 |
> |
@SuppressWarnings("serial") |
5117 |
> |
static final class SearchKeysTask<K,V,U> |
5118 |
> |
extends BulkTask<K,V,U> { |
5119 |
|
final Function<? super K, ? extends U> searchFunction; |
5120 |
|
final AtomicReference<U> result; |
5121 |
|
SearchKeysTask |
5122 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
5122 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
5123 |
|
Function<? super K, ? extends U> searchFunction, |
5124 |
|
AtomicReference<U> result) { |
5125 |
< |
super(m, p, b); |
5125 |
> |
super(p, b, i, f, t); |
5126 |
|
this.searchFunction = searchFunction; this.result = result; |
5127 |
|
} |
5128 |
|
public final U getRawResult() { return result.get(); } |
5131 |
|
final AtomicReference<U> result; |
5132 |
|
if ((searchFunction = this.searchFunction) != null && |
5133 |
|
(result = this.result) != null) { |
5134 |
< |
for (int b;;) { |
5134 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
5135 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
5136 |
|
if (result.get() != null) |
5137 |
|
return; |
5138 |
< |
if ((b = preSplit()) <= 0) |
5780 |
< |
break; |
5138 |
> |
addToPendingCount(1); |
5139 |
|
new SearchKeysTask<K,V,U> |
5140 |
< |
(map, this, b, searchFunction, result).fork(); |
5140 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
5141 |
> |
searchFunction, result).fork(); |
5142 |
|
} |
5143 |
|
while (result.get() == null) { |
5144 |
|
U u; |
5145 |
< |
if (advance() == null) { |
5145 |
> |
Node<K,V> p; |
5146 |
> |
if ((p = advance()) == null) { |
5147 |
|
propagateCompletion(); |
5148 |
|
break; |
5149 |
|
} |
5150 |
< |
if ((u = searchFunction.apply(nextKey)) != null) { |
5150 |
> |
if ((u = searchFunction.apply(p.key)) != null) { |
5151 |
|
if (result.compareAndSet(null, u)) |
5152 |
|
quietlyCompleteRoot(); |
5153 |
|
break; |
5157 |
|
} |
5158 |
|
} |
5159 |
|
|
5160 |
< |
@SuppressWarnings("serial") static final class SearchValuesTask<K,V,U> |
5161 |
< |
extends Traverser<K,V,U> { |
5160 |
> |
@SuppressWarnings("serial") |
5161 |
> |
static final class SearchValuesTask<K,V,U> |
5162 |
> |
extends BulkTask<K,V,U> { |
5163 |
|
final Function<? super V, ? extends U> searchFunction; |
5164 |
|
final AtomicReference<U> result; |
5165 |
|
SearchValuesTask |
5166 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
5166 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
5167 |
|
Function<? super V, ? extends U> searchFunction, |
5168 |
|
AtomicReference<U> result) { |
5169 |
< |
super(m, p, b); |
5169 |
> |
super(p, b, i, f, t); |
5170 |
|
this.searchFunction = searchFunction; this.result = result; |
5171 |
|
} |
5172 |
|
public final U getRawResult() { return result.get(); } |
5175 |
|
final AtomicReference<U> result; |
5176 |
|
if ((searchFunction = this.searchFunction) != null && |
5177 |
|
(result = this.result) != null) { |
5178 |
< |
for (int b;;) { |
5178 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
5179 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
5180 |
|
if (result.get() != null) |
5181 |
|
return; |
5182 |
< |
if ((b = preSplit()) <= 0) |
5821 |
< |
break; |
5182 |
> |
addToPendingCount(1); |
5183 |
|
new SearchValuesTask<K,V,U> |
5184 |
< |
(map, this, b, searchFunction, result).fork(); |
5184 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
5185 |
> |
searchFunction, result).fork(); |
5186 |
|
} |
5187 |
|
while (result.get() == null) { |
5188 |
< |
V v; U u; |
5189 |
< |
if ((v = advance()) == null) { |
5188 |
> |
U u; |
5189 |
> |
Node<K,V> p; |
5190 |
> |
if ((p = advance()) == null) { |
5191 |
|
propagateCompletion(); |
5192 |
|
break; |
5193 |
|
} |
5194 |
< |
if ((u = searchFunction.apply(v)) != null) { |
5194 |
> |
if ((u = searchFunction.apply(p.val)) != null) { |
5195 |
|
if (result.compareAndSet(null, u)) |
5196 |
|
quietlyCompleteRoot(); |
5197 |
|
break; |
5201 |
|
} |
5202 |
|
} |
5203 |
|
|
5204 |
< |
@SuppressWarnings("serial") static final class SearchEntriesTask<K,V,U> |
5205 |
< |
extends Traverser<K,V,U> { |
5204 |
> |
@SuppressWarnings("serial") |
5205 |
> |
static final class SearchEntriesTask<K,V,U> |
5206 |
> |
extends BulkTask<K,V,U> { |
5207 |
|
final Function<Entry<K,V>, ? extends U> searchFunction; |
5208 |
|
final AtomicReference<U> result; |
5209 |
|
SearchEntriesTask |
5210 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
5210 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
5211 |
|
Function<Entry<K,V>, ? extends U> searchFunction, |
5212 |
|
AtomicReference<U> result) { |
5213 |
< |
super(m, p, b); |
5213 |
> |
super(p, b, i, f, t); |
5214 |
|
this.searchFunction = searchFunction; this.result = result; |
5215 |
|
} |
5216 |
|
public final U getRawResult() { return result.get(); } |
5219 |
|
final AtomicReference<U> result; |
5220 |
|
if ((searchFunction = this.searchFunction) != null && |
5221 |
|
(result = this.result) != null) { |
5222 |
< |
for (int b;;) { |
5222 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
5223 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
5224 |
|
if (result.get() != null) |
5225 |
|
return; |
5226 |
< |
if ((b = preSplit()) <= 0) |
5862 |
< |
break; |
5226 |
> |
addToPendingCount(1); |
5227 |
|
new SearchEntriesTask<K,V,U> |
5228 |
< |
(map, this, b, searchFunction, result).fork(); |
5228 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
5229 |
> |
searchFunction, result).fork(); |
5230 |
|
} |
5231 |
|
while (result.get() == null) { |
5232 |
< |
V v; U u; |
5233 |
< |
if ((v = advance()) == null) { |
5232 |
> |
U u; |
5233 |
> |
Node<K,V> p; |
5234 |
> |
if ((p = advance()) == null) { |
5235 |
|
propagateCompletion(); |
5236 |
|
break; |
5237 |
|
} |
5238 |
< |
if ((u = searchFunction.apply(entryFor(nextKey, |
5873 |
< |
v))) != null) { |
5238 |
> |
if ((u = searchFunction.apply(p)) != null) { |
5239 |
|
if (result.compareAndSet(null, u)) |
5240 |
|
quietlyCompleteRoot(); |
5241 |
|
return; |
5245 |
|
} |
5246 |
|
} |
5247 |
|
|
5248 |
< |
@SuppressWarnings("serial") static final class SearchMappingsTask<K,V,U> |
5249 |
< |
extends Traverser<K,V,U> { |
5248 |
> |
@SuppressWarnings("serial") |
5249 |
> |
static final class SearchMappingsTask<K,V,U> |
5250 |
> |
extends BulkTask<K,V,U> { |
5251 |
|
final BiFunction<? super K, ? super V, ? extends U> searchFunction; |
5252 |
|
final AtomicReference<U> result; |
5253 |
|
SearchMappingsTask |
5254 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
5254 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
5255 |
|
BiFunction<? super K, ? super V, ? extends U> searchFunction, |
5256 |
|
AtomicReference<U> result) { |
5257 |
< |
super(m, p, b); |
5257 |
> |
super(p, b, i, f, t); |
5258 |
|
this.searchFunction = searchFunction; this.result = result; |
5259 |
|
} |
5260 |
|
public final U getRawResult() { return result.get(); } |
5263 |
|
final AtomicReference<U> result; |
5264 |
|
if ((searchFunction = this.searchFunction) != null && |
5265 |
|
(result = this.result) != null) { |
5266 |
< |
for (int b;;) { |
5266 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
5267 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
5268 |
|
if (result.get() != null) |
5269 |
|
return; |
5270 |
< |
if ((b = preSplit()) <= 0) |
5904 |
< |
break; |
5270 |
> |
addToPendingCount(1); |
5271 |
|
new SearchMappingsTask<K,V,U> |
5272 |
< |
(map, this, b, searchFunction, result).fork(); |
5272 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
5273 |
> |
searchFunction, result).fork(); |
5274 |
|
} |
5275 |
|
while (result.get() == null) { |
5276 |
< |
V v; U u; |
5277 |
< |
if ((v = advance()) == null) { |
5276 |
> |
U u; |
5277 |
> |
Node<K,V> p; |
5278 |
> |
if ((p = advance()) == null) { |
5279 |
|
propagateCompletion(); |
5280 |
|
break; |
5281 |
|
} |
5282 |
< |
if ((u = searchFunction.apply(nextKey, v)) != null) { |
5282 |
> |
if ((u = searchFunction.apply(p.key, p.val)) != null) { |
5283 |
|
if (result.compareAndSet(null, u)) |
5284 |
|
quietlyCompleteRoot(); |
5285 |
|
break; |
5289 |
|
} |
5290 |
|
} |
5291 |
|
|
5292 |
< |
@SuppressWarnings("serial") static final class ReduceKeysTask<K,V> |
5293 |
< |
extends Traverser<K,V,K> { |
5292 |
> |
@SuppressWarnings("serial") |
5293 |
> |
static final class ReduceKeysTask<K,V> |
5294 |
> |
extends BulkTask<K,V,K> { |
5295 |
|
final BiFunction<? super K, ? super K, ? extends K> reducer; |
5296 |
|
K result; |
5297 |
|
ReduceKeysTask<K,V> rights, nextRight; |
5298 |
|
ReduceKeysTask |
5299 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
5299 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
5300 |
|
ReduceKeysTask<K,V> nextRight, |
5301 |
|
BiFunction<? super K, ? super K, ? extends K> reducer) { |
5302 |
< |
super(m, p, b); this.nextRight = nextRight; |
5302 |
> |
super(p, b, i, f, t); this.nextRight = nextRight; |
5303 |
|
this.reducer = reducer; |
5304 |
|
} |
5305 |
|
public final K getRawResult() { return result; } |
5306 |
< |
@SuppressWarnings("unchecked") public final void compute() { |
5306 |
> |
public final void compute() { |
5307 |
|
final BiFunction<? super K, ? super K, ? extends K> reducer; |
5308 |
|
if ((reducer = this.reducer) != null) { |
5309 |
< |
for (int b; (b = preSplit()) > 0;) |
5309 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
5310 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
5311 |
> |
addToPendingCount(1); |
5312 |
|
(rights = new ReduceKeysTask<K,V> |
5313 |
< |
(map, this, b, rights, reducer)).fork(); |
5313 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
5314 |
> |
rights, reducer)).fork(); |
5315 |
> |
} |
5316 |
|
K r = null; |
5317 |
< |
while (advance() != null) { |
5318 |
< |
K u = nextKey; |
5317 |
> |
for (Node<K,V> p; (p = advance()) != null; ) { |
5318 |
> |
K u = p.key; |
5319 |
|
r = (r == null) ? u : u == null ? r : reducer.apply(r, u); |
5320 |
|
} |
5321 |
|
result = r; |
5322 |
|
CountedCompleter<?> c; |
5323 |
|
for (c = firstComplete(); c != null; c = c.nextComplete()) { |
5324 |
+ |
@SuppressWarnings("unchecked") |
5325 |
|
ReduceKeysTask<K,V> |
5326 |
|
t = (ReduceKeysTask<K,V>)c, |
5327 |
|
s = t.rights; |
5337 |
|
} |
5338 |
|
} |
5339 |
|
|
5340 |
< |
@SuppressWarnings("serial") static final class ReduceValuesTask<K,V> |
5341 |
< |
extends Traverser<K,V,V> { |
5340 |
> |
@SuppressWarnings("serial") |
5341 |
> |
static final class ReduceValuesTask<K,V> |
5342 |
> |
extends BulkTask<K,V,V> { |
5343 |
|
final BiFunction<? super V, ? super V, ? extends V> reducer; |
5344 |
|
V result; |
5345 |
|
ReduceValuesTask<K,V> rights, nextRight; |
5346 |
|
ReduceValuesTask |
5347 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
5347 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
5348 |
|
ReduceValuesTask<K,V> nextRight, |
5349 |
|
BiFunction<? super V, ? super V, ? extends V> reducer) { |
5350 |
< |
super(m, p, b); this.nextRight = nextRight; |
5350 |
> |
super(p, b, i, f, t); this.nextRight = nextRight; |
5351 |
|
this.reducer = reducer; |
5352 |
|
} |
5353 |
|
public final V getRawResult() { return result; } |
5354 |
< |
@SuppressWarnings("unchecked") public final void compute() { |
5354 |
> |
public final void compute() { |
5355 |
|
final BiFunction<? super V, ? super V, ? extends V> reducer; |
5356 |
|
if ((reducer = this.reducer) != null) { |
5357 |
< |
for (int b; (b = preSplit()) > 0;) |
5357 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
5358 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
5359 |
> |
addToPendingCount(1); |
5360 |
|
(rights = new ReduceValuesTask<K,V> |
5361 |
< |
(map, this, b, rights, reducer)).fork(); |
5362 |
< |
V r = null, v; |
5363 |
< |
while ((v = advance()) != null) |
5361 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
5362 |
> |
rights, reducer)).fork(); |
5363 |
> |
} |
5364 |
> |
V r = null; |
5365 |
> |
for (Node<K,V> p; (p = advance()) != null; ) { |
5366 |
> |
V v = p.val; |
5367 |
|
r = (r == null) ? v : reducer.apply(r, v); |
5368 |
+ |
} |
5369 |
|
result = r; |
5370 |
|
CountedCompleter<?> c; |
5371 |
|
for (c = firstComplete(); c != null; c = c.nextComplete()) { |
5372 |
+ |
@SuppressWarnings("unchecked") |
5373 |
|
ReduceValuesTask<K,V> |
5374 |
|
t = (ReduceValuesTask<K,V>)c, |
5375 |
|
s = t.rights; |
5385 |
|
} |
5386 |
|
} |
5387 |
|
|
5388 |
< |
@SuppressWarnings("serial") static final class ReduceEntriesTask<K,V> |
5389 |
< |
extends Traverser<K,V,Map.Entry<K,V>> { |
5388 |
> |
@SuppressWarnings("serial") |
5389 |
> |
static final class ReduceEntriesTask<K,V> |
5390 |
> |
extends BulkTask<K,V,Map.Entry<K,V>> { |
5391 |
|
final BiFunction<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer; |
5392 |
|
Map.Entry<K,V> result; |
5393 |
|
ReduceEntriesTask<K,V> rights, nextRight; |
5394 |
|
ReduceEntriesTask |
5395 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
5395 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
5396 |
|
ReduceEntriesTask<K,V> nextRight, |
5397 |
|
BiFunction<Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) { |
5398 |
< |
super(m, p, b); this.nextRight = nextRight; |
5398 |
> |
super(p, b, i, f, t); this.nextRight = nextRight; |
5399 |
|
this.reducer = reducer; |
5400 |
|
} |
5401 |
|
public final Map.Entry<K,V> getRawResult() { return result; } |
5402 |
< |
@SuppressWarnings("unchecked") public final void compute() { |
5402 |
> |
public final void compute() { |
5403 |
|
final BiFunction<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer; |
5404 |
|
if ((reducer = this.reducer) != null) { |
5405 |
< |
for (int b; (b = preSplit()) > 0;) |
5405 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
5406 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
5407 |
> |
addToPendingCount(1); |
5408 |
|
(rights = new ReduceEntriesTask<K,V> |
5409 |
< |
(map, this, b, rights, reducer)).fork(); |
5410 |
< |
Map.Entry<K,V> r = null; |
6026 |
< |
V v; |
6027 |
< |
while ((v = advance()) != null) { |
6028 |
< |
Map.Entry<K,V> u = entryFor(nextKey, v); |
6029 |
< |
r = (r == null) ? u : reducer.apply(r, u); |
5409 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
5410 |
> |
rights, reducer)).fork(); |
5411 |
|
} |
5412 |
+ |
Map.Entry<K,V> r = null; |
5413 |
+ |
for (Node<K,V> p; (p = advance()) != null; ) |
5414 |
+ |
r = (r == null) ? p : reducer.apply(r, p); |
5415 |
|
result = r; |
5416 |
|
CountedCompleter<?> c; |
5417 |
|
for (c = firstComplete(); c != null; c = c.nextComplete()) { |
5418 |
+ |
@SuppressWarnings("unchecked") |
5419 |
|
ReduceEntriesTask<K,V> |
5420 |
|
t = (ReduceEntriesTask<K,V>)c, |
5421 |
|
s = t.rights; |
5431 |
|
} |
5432 |
|
} |
5433 |
|
|
5434 |
< |
@SuppressWarnings("serial") static final class MapReduceKeysTask<K,V,U> |
5435 |
< |
extends Traverser<K,V,U> { |
5434 |
> |
@SuppressWarnings("serial") |
5435 |
> |
static final class MapReduceKeysTask<K,V,U> |
5436 |
> |
extends BulkTask<K,V,U> { |
5437 |
|
final Function<? super K, ? extends U> transformer; |
5438 |
|
final BiFunction<? super U, ? super U, ? extends U> reducer; |
5439 |
|
U result; |
5440 |
|
MapReduceKeysTask<K,V,U> rights, nextRight; |
5441 |
|
MapReduceKeysTask |
5442 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
5442 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
5443 |
|
MapReduceKeysTask<K,V,U> nextRight, |
5444 |
|
Function<? super K, ? extends U> transformer, |
5445 |
|
BiFunction<? super U, ? super U, ? extends U> reducer) { |
5446 |
< |
super(m, p, b); this.nextRight = nextRight; |
5446 |
> |
super(p, b, i, f, t); this.nextRight = nextRight; |
5447 |
|
this.transformer = transformer; |
5448 |
|
this.reducer = reducer; |
5449 |
|
} |
5450 |
|
public final U getRawResult() { return result; } |
5451 |
< |
@SuppressWarnings("unchecked") public final void compute() { |
5451 |
> |
public final void compute() { |
5452 |
|
final Function<? super K, ? extends U> transformer; |
5453 |
|
final BiFunction<? super U, ? super U, ? extends U> reducer; |
5454 |
|
if ((transformer = this.transformer) != null && |
5455 |
|
(reducer = this.reducer) != null) { |
5456 |
< |
for (int b; (b = preSplit()) > 0;) |
5456 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
5457 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
5458 |
> |
addToPendingCount(1); |
5459 |
|
(rights = new MapReduceKeysTask<K,V,U> |
5460 |
< |
(map, this, b, rights, transformer, reducer)).fork(); |
5461 |
< |
U r = null, u; |
5462 |
< |
while (advance() != null) { |
5463 |
< |
if ((u = transformer.apply(nextKey)) != null) |
5460 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
5461 |
> |
rights, transformer, reducer)).fork(); |
5462 |
> |
} |
5463 |
> |
U r = null; |
5464 |
> |
for (Node<K,V> p; (p = advance()) != null; ) { |
5465 |
> |
U u; |
5466 |
> |
if ((u = transformer.apply(p.key)) != null) |
5467 |
|
r = (r == null) ? u : reducer.apply(r, u); |
5468 |
|
} |
5469 |
|
result = r; |
5470 |
|
CountedCompleter<?> c; |
5471 |
|
for (c = firstComplete(); c != null; c = c.nextComplete()) { |
5472 |
+ |
@SuppressWarnings("unchecked") |
5473 |
|
MapReduceKeysTask<K,V,U> |
5474 |
|
t = (MapReduceKeysTask<K,V,U>)c, |
5475 |
|
s = t.rights; |
5485 |
|
} |
5486 |
|
} |
5487 |
|
|
5488 |
< |
@SuppressWarnings("serial") static final class MapReduceValuesTask<K,V,U> |
5489 |
< |
extends Traverser<K,V,U> { |
5488 |
> |
@SuppressWarnings("serial") |
5489 |
> |
static final class MapReduceValuesTask<K,V,U> |
5490 |
> |
extends BulkTask<K,V,U> { |
5491 |
|
final Function<? super V, ? extends U> transformer; |
5492 |
|
final BiFunction<? super U, ? super U, ? extends U> reducer; |
5493 |
|
U result; |
5494 |
|
MapReduceValuesTask<K,V,U> rights, nextRight; |
5495 |
|
MapReduceValuesTask |
5496 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
5496 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
5497 |
|
MapReduceValuesTask<K,V,U> nextRight, |
5498 |
|
Function<? super V, ? extends U> transformer, |
5499 |
|
BiFunction<? super U, ? super U, ? extends U> reducer) { |
5500 |
< |
super(m, p, b); this.nextRight = nextRight; |
5500 |
> |
super(p, b, i, f, t); this.nextRight = nextRight; |
5501 |
|
this.transformer = transformer; |
5502 |
|
this.reducer = reducer; |
5503 |
|
} |
5504 |
|
public final U getRawResult() { return result; } |
5505 |
< |
@SuppressWarnings("unchecked") public final void compute() { |
5505 |
> |
public final void compute() { |
5506 |
|
final Function<? super V, ? extends U> transformer; |
5507 |
|
final BiFunction<? super U, ? super U, ? extends U> reducer; |
5508 |
|
if ((transformer = this.transformer) != null && |
5509 |
|
(reducer = this.reducer) != null) { |
5510 |
< |
for (int b; (b = preSplit()) > 0;) |
5510 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
5511 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
5512 |
> |
addToPendingCount(1); |
5513 |
|
(rights = new MapReduceValuesTask<K,V,U> |
5514 |
< |
(map, this, b, rights, transformer, reducer)).fork(); |
5515 |
< |
U r = null, u; |
5516 |
< |
V v; |
5517 |
< |
while ((v = advance()) != null) { |
5518 |
< |
if ((u = transformer.apply(v)) != null) |
5514 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
5515 |
> |
rights, transformer, reducer)).fork(); |
5516 |
> |
} |
5517 |
> |
U r = null; |
5518 |
> |
for (Node<K,V> p; (p = advance()) != null; ) { |
5519 |
> |
U u; |
5520 |
> |
if ((u = transformer.apply(p.val)) != null) |
5521 |
|
r = (r == null) ? u : reducer.apply(r, u); |
5522 |
|
} |
5523 |
|
result = r; |
5524 |
|
CountedCompleter<?> c; |
5525 |
|
for (c = firstComplete(); c != null; c = c.nextComplete()) { |
5526 |
+ |
@SuppressWarnings("unchecked") |
5527 |
|
MapReduceValuesTask<K,V,U> |
5528 |
|
t = (MapReduceValuesTask<K,V,U>)c, |
5529 |
|
s = t.rights; |
5539 |
|
} |
5540 |
|
} |
5541 |
|
|
5542 |
< |
@SuppressWarnings("serial") static final class MapReduceEntriesTask<K,V,U> |
5543 |
< |
extends Traverser<K,V,U> { |
5542 |
> |
@SuppressWarnings("serial") |
5543 |
> |
static final class MapReduceEntriesTask<K,V,U> |
5544 |
> |
extends BulkTask<K,V,U> { |
5545 |
|
final Function<Map.Entry<K,V>, ? extends U> transformer; |
5546 |
|
final BiFunction<? super U, ? super U, ? extends U> reducer; |
5547 |
|
U result; |
5548 |
|
MapReduceEntriesTask<K,V,U> rights, nextRight; |
5549 |
|
MapReduceEntriesTask |
5550 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
5550 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
5551 |
|
MapReduceEntriesTask<K,V,U> nextRight, |
5552 |
|
Function<Map.Entry<K,V>, ? extends U> transformer, |
5553 |
|
BiFunction<? super U, ? super U, ? extends U> reducer) { |
5554 |
< |
super(m, p, b); this.nextRight = nextRight; |
5554 |
> |
super(p, b, i, f, t); this.nextRight = nextRight; |
5555 |
|
this.transformer = transformer; |
5556 |
|
this.reducer = reducer; |
5557 |
|
} |
5558 |
|
public final U getRawResult() { return result; } |
5559 |
< |
@SuppressWarnings("unchecked") public final void compute() { |
5559 |
> |
public final void compute() { |
5560 |
|
final Function<Map.Entry<K,V>, ? extends U> transformer; |
5561 |
|
final BiFunction<? super U, ? super U, ? extends U> reducer; |
5562 |
|
if ((transformer = this.transformer) != null && |
5563 |
|
(reducer = this.reducer) != null) { |
5564 |
< |
for (int b; (b = preSplit()) > 0;) |
5564 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
5565 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
5566 |
> |
addToPendingCount(1); |
5567 |
|
(rights = new MapReduceEntriesTask<K,V,U> |
5568 |
< |
(map, this, b, rights, transformer, reducer)).fork(); |
5569 |
< |
U r = null, u; |
5570 |
< |
V v; |
5571 |
< |
while ((v = advance()) != null) { |
5572 |
< |
if ((u = transformer.apply(entryFor(nextKey, |
5573 |
< |
v))) != null) |
5568 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
5569 |
> |
rights, transformer, reducer)).fork(); |
5570 |
> |
} |
5571 |
> |
U r = null; |
5572 |
> |
for (Node<K,V> p; (p = advance()) != null; ) { |
5573 |
> |
U u; |
5574 |
> |
if ((u = transformer.apply(p)) != null) |
5575 |
|
r = (r == null) ? u : reducer.apply(r, u); |
5576 |
|
} |
5577 |
|
result = r; |
5578 |
|
CountedCompleter<?> c; |
5579 |
|
for (c = firstComplete(); c != null; c = c.nextComplete()) { |
5580 |
+ |
@SuppressWarnings("unchecked") |
5581 |
|
MapReduceEntriesTask<K,V,U> |
5582 |
|
t = (MapReduceEntriesTask<K,V,U>)c, |
5583 |
|
s = t.rights; |
5593 |
|
} |
5594 |
|
} |
5595 |
|
|
5596 |
< |
@SuppressWarnings("serial") static final class MapReduceMappingsTask<K,V,U> |
5597 |
< |
extends Traverser<K,V,U> { |
5596 |
> |
@SuppressWarnings("serial") |
5597 |
> |
static final class MapReduceMappingsTask<K,V,U> |
5598 |
> |
extends BulkTask<K,V,U> { |
5599 |
|
final BiFunction<? super K, ? super V, ? extends U> transformer; |
5600 |
|
final BiFunction<? super U, ? super U, ? extends U> reducer; |
5601 |
|
U result; |
5602 |
|
MapReduceMappingsTask<K,V,U> rights, nextRight; |
5603 |
|
MapReduceMappingsTask |
5604 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
5604 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
5605 |
|
MapReduceMappingsTask<K,V,U> nextRight, |
5606 |
|
BiFunction<? super K, ? super V, ? extends U> transformer, |
5607 |
|
BiFunction<? super U, ? super U, ? extends U> reducer) { |
5608 |
< |
super(m, p, b); this.nextRight = nextRight; |
5608 |
> |
super(p, b, i, f, t); this.nextRight = nextRight; |
5609 |
|
this.transformer = transformer; |
5610 |
|
this.reducer = reducer; |
5611 |
|
} |
5612 |
|
public final U getRawResult() { return result; } |
5613 |
< |
@SuppressWarnings("unchecked") public final void compute() { |
5613 |
> |
public final void compute() { |
5614 |
|
final BiFunction<? super K, ? super V, ? extends U> transformer; |
5615 |
|
final BiFunction<? super U, ? super U, ? extends U> reducer; |
5616 |
|
if ((transformer = this.transformer) != null && |
5617 |
|
(reducer = this.reducer) != null) { |
5618 |
< |
for (int b; (b = preSplit()) > 0;) |
5618 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
5619 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
5620 |
> |
addToPendingCount(1); |
5621 |
|
(rights = new MapReduceMappingsTask<K,V,U> |
5622 |
< |
(map, this, b, rights, transformer, reducer)).fork(); |
5623 |
< |
U r = null, u; |
5624 |
< |
V v; |
5625 |
< |
while ((v = advance()) != null) { |
5626 |
< |
if ((u = transformer.apply(nextKey, v)) != null) |
5622 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
5623 |
> |
rights, transformer, reducer)).fork(); |
5624 |
> |
} |
5625 |
> |
U r = null; |
5626 |
> |
for (Node<K,V> p; (p = advance()) != null; ) { |
5627 |
> |
U u; |
5628 |
> |
if ((u = transformer.apply(p.key, p.val)) != null) |
5629 |
|
r = (r == null) ? u : reducer.apply(r, u); |
5630 |
|
} |
5631 |
|
result = r; |
5632 |
|
CountedCompleter<?> c; |
5633 |
|
for (c = firstComplete(); c != null; c = c.nextComplete()) { |
5634 |
+ |
@SuppressWarnings("unchecked") |
5635 |
|
MapReduceMappingsTask<K,V,U> |
5636 |
|
t = (MapReduceMappingsTask<K,V,U>)c, |
5637 |
|
s = t.rights; |
5647 |
|
} |
5648 |
|
} |
5649 |
|
|
5650 |
< |
@SuppressWarnings("serial") static final class MapReduceKeysToDoubleTask<K,V> |
5651 |
< |
extends Traverser<K,V,Double> { |
5650 |
> |
@SuppressWarnings("serial") |
5651 |
> |
static final class MapReduceKeysToDoubleTask<K,V> |
5652 |
> |
extends BulkTask<K,V,Double> { |
5653 |
|
final ToDoubleFunction<? super K> transformer; |
5654 |
|
final DoubleBinaryOperator reducer; |
5655 |
|
final double basis; |
5656 |
|
double result; |
5657 |
|
MapReduceKeysToDoubleTask<K,V> rights, nextRight; |
5658 |
|
MapReduceKeysToDoubleTask |
5659 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
5659 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
5660 |
|
MapReduceKeysToDoubleTask<K,V> nextRight, |
5661 |
|
ToDoubleFunction<? super K> transformer, |
5662 |
|
double basis, |
5663 |
|
DoubleBinaryOperator reducer) { |
5664 |
< |
super(m, p, b); this.nextRight = nextRight; |
5664 |
> |
super(p, b, i, f, t); this.nextRight = nextRight; |
5665 |
|
this.transformer = transformer; |
5666 |
|
this.basis = basis; this.reducer = reducer; |
5667 |
|
} |
5668 |
|
public final Double getRawResult() { return result; } |
5669 |
< |
@SuppressWarnings("unchecked") public final void compute() { |
5669 |
> |
public final void compute() { |
5670 |
|
final ToDoubleFunction<? super K> transformer; |
5671 |
|
final DoubleBinaryOperator reducer; |
5672 |
|
if ((transformer = this.transformer) != null && |
5673 |
|
(reducer = this.reducer) != null) { |
5674 |
|
double r = this.basis; |
5675 |
< |
for (int b; (b = preSplit()) > 0;) |
5675 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
5676 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
5677 |
> |
addToPendingCount(1); |
5678 |
|
(rights = new MapReduceKeysToDoubleTask<K,V> |
5679 |
< |
(map, this, b, rights, transformer, r, reducer)).fork(); |
5680 |
< |
while (advance() != null) |
5681 |
< |
r = reducer.applyAsDouble(r, transformer.applyAsDouble(nextKey)); |
5679 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
5680 |
> |
rights, transformer, r, reducer)).fork(); |
5681 |
> |
} |
5682 |
> |
for (Node<K,V> p; (p = advance()) != null; ) |
5683 |
> |
r = reducer.applyAsDouble(r, transformer.applyAsDouble(p.key)); |
5684 |
|
result = r; |
5685 |
|
CountedCompleter<?> c; |
5686 |
|
for (c = firstComplete(); c != null; c = c.nextComplete()) { |
5687 |
+ |
@SuppressWarnings("unchecked") |
5688 |
|
MapReduceKeysToDoubleTask<K,V> |
5689 |
|
t = (MapReduceKeysToDoubleTask<K,V>)c, |
5690 |
|
s = t.rights; |
5697 |
|
} |
5698 |
|
} |
5699 |
|
|
5700 |
< |
@SuppressWarnings("serial") static final class MapReduceValuesToDoubleTask<K,V> |
5701 |
< |
extends Traverser<K,V,Double> { |
5700 |
> |
@SuppressWarnings("serial") |
5701 |
> |
static final class MapReduceValuesToDoubleTask<K,V> |
5702 |
> |
extends BulkTask<K,V,Double> { |
5703 |
|
final ToDoubleFunction<? super V> transformer; |
5704 |
|
final DoubleBinaryOperator reducer; |
5705 |
|
final double basis; |
5706 |
|
double result; |
5707 |
|
MapReduceValuesToDoubleTask<K,V> rights, nextRight; |
5708 |
|
MapReduceValuesToDoubleTask |
5709 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
5709 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
5710 |
|
MapReduceValuesToDoubleTask<K,V> nextRight, |
5711 |
|
ToDoubleFunction<? super V> transformer, |
5712 |
|
double basis, |
5713 |
|
DoubleBinaryOperator reducer) { |
5714 |
< |
super(m, p, b); this.nextRight = nextRight; |
5714 |
> |
super(p, b, i, f, t); this.nextRight = nextRight; |
5715 |
|
this.transformer = transformer; |
5716 |
|
this.basis = basis; this.reducer = reducer; |
5717 |
|
} |
5718 |
|
public final Double getRawResult() { return result; } |
5719 |
< |
@SuppressWarnings("unchecked") public final void compute() { |
5719 |
> |
public final void compute() { |
5720 |
|
final ToDoubleFunction<? super V> transformer; |
5721 |
|
final DoubleBinaryOperator reducer; |
5722 |
|
if ((transformer = this.transformer) != null && |
5723 |
|
(reducer = this.reducer) != null) { |
5724 |
|
double r = this.basis; |
5725 |
< |
for (int b; (b = preSplit()) > 0;) |
5725 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
5726 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
5727 |
> |
addToPendingCount(1); |
5728 |
|
(rights = new MapReduceValuesToDoubleTask<K,V> |
5729 |
< |
(map, this, b, rights, transformer, r, reducer)).fork(); |
5730 |
< |
V v; |
5731 |
< |
while ((v = advance()) != null) |
5732 |
< |
r = reducer.applyAsDouble(r, transformer.applyAsDouble(v)); |
5729 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
5730 |
> |
rights, transformer, r, reducer)).fork(); |
5731 |
> |
} |
5732 |
> |
for (Node<K,V> p; (p = advance()) != null; ) |
5733 |
> |
r = reducer.applyAsDouble(r, transformer.applyAsDouble(p.val)); |
5734 |
|
result = r; |
5735 |
|
CountedCompleter<?> c; |
5736 |
|
for (c = firstComplete(); c != null; c = c.nextComplete()) { |
5737 |
+ |
@SuppressWarnings("unchecked") |
5738 |
|
MapReduceValuesToDoubleTask<K,V> |
5739 |
|
t = (MapReduceValuesToDoubleTask<K,V>)c, |
5740 |
|
s = t.rights; |
5747 |
|
} |
5748 |
|
} |
5749 |
|
|
5750 |
< |
@SuppressWarnings("serial") static final class MapReduceEntriesToDoubleTask<K,V> |
5751 |
< |
extends Traverser<K,V,Double> { |
5750 |
> |
@SuppressWarnings("serial") |
5751 |
> |
static final class MapReduceEntriesToDoubleTask<K,V> |
5752 |
> |
extends BulkTask<K,V,Double> { |
5753 |
|
final ToDoubleFunction<Map.Entry<K,V>> transformer; |
5754 |
|
final DoubleBinaryOperator reducer; |
5755 |
|
final double basis; |
5756 |
|
double result; |
5757 |
|
MapReduceEntriesToDoubleTask<K,V> rights, nextRight; |
5758 |
|
MapReduceEntriesToDoubleTask |
5759 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
5759 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
5760 |
|
MapReduceEntriesToDoubleTask<K,V> nextRight, |
5761 |
|
ToDoubleFunction<Map.Entry<K,V>> transformer, |
5762 |
|
double basis, |
5763 |
|
DoubleBinaryOperator reducer) { |
5764 |
< |
super(m, p, b); this.nextRight = nextRight; |
5764 |
> |
super(p, b, i, f, t); this.nextRight = nextRight; |
5765 |
|
this.transformer = transformer; |
5766 |
|
this.basis = basis; this.reducer = reducer; |
5767 |
|
} |
5768 |
|
public final Double getRawResult() { return result; } |
5769 |
< |
@SuppressWarnings("unchecked") public final void compute() { |
5769 |
> |
public final void compute() { |
5770 |
|
final ToDoubleFunction<Map.Entry<K,V>> transformer; |
5771 |
|
final DoubleBinaryOperator reducer; |
5772 |
|
if ((transformer = this.transformer) != null && |
5773 |
|
(reducer = this.reducer) != null) { |
5774 |
|
double r = this.basis; |
5775 |
< |
for (int b; (b = preSplit()) > 0;) |
5775 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
5776 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
5777 |
> |
addToPendingCount(1); |
5778 |
|
(rights = new MapReduceEntriesToDoubleTask<K,V> |
5779 |
< |
(map, this, b, rights, transformer, r, reducer)).fork(); |
5780 |
< |
V v; |
5781 |
< |
while ((v = advance()) != null) |
5782 |
< |
r = reducer.applyAsDouble(r, transformer.applyAsDouble(entryFor(nextKey, |
5783 |
< |
v))); |
5779 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
5780 |
> |
rights, transformer, r, reducer)).fork(); |
5781 |
> |
} |
5782 |
> |
for (Node<K,V> p; (p = advance()) != null; ) |
5783 |
> |
r = reducer.applyAsDouble(r, transformer.applyAsDouble(p)); |
5784 |
|
result = r; |
5785 |
|
CountedCompleter<?> c; |
5786 |
|
for (c = firstComplete(); c != null; c = c.nextComplete()) { |
5787 |
+ |
@SuppressWarnings("unchecked") |
5788 |
|
MapReduceEntriesToDoubleTask<K,V> |
5789 |
|
t = (MapReduceEntriesToDoubleTask<K,V>)c, |
5790 |
|
s = t.rights; |
5797 |
|
} |
5798 |
|
} |
5799 |
|
|
5800 |
< |
@SuppressWarnings("serial") static final class MapReduceMappingsToDoubleTask<K,V> |
5801 |
< |
extends Traverser<K,V,Double> { |
5800 |
> |
@SuppressWarnings("serial") |
5801 |
> |
static final class MapReduceMappingsToDoubleTask<K,V> |
5802 |
> |
extends BulkTask<K,V,Double> { |
5803 |
|
final ToDoubleBiFunction<? super K, ? super V> transformer; |
5804 |
|
final DoubleBinaryOperator reducer; |
5805 |
|
final double basis; |
5806 |
|
double result; |
5807 |
|
MapReduceMappingsToDoubleTask<K,V> rights, nextRight; |
5808 |
|
MapReduceMappingsToDoubleTask |
5809 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
5809 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
5810 |
|
MapReduceMappingsToDoubleTask<K,V> nextRight, |
5811 |
|
ToDoubleBiFunction<? super K, ? super V> transformer, |
5812 |
|
double basis, |
5813 |
|
DoubleBinaryOperator reducer) { |
5814 |
< |
super(m, p, b); this.nextRight = nextRight; |
5814 |
> |
super(p, b, i, f, t); this.nextRight = nextRight; |
5815 |
|
this.transformer = transformer; |
5816 |
|
this.basis = basis; this.reducer = reducer; |
5817 |
|
} |
5818 |
|
public final Double getRawResult() { return result; } |
5819 |
< |
@SuppressWarnings("unchecked") public final void compute() { |
5819 |
> |
public final void compute() { |
5820 |
|
final ToDoubleBiFunction<? super K, ? super V> transformer; |
5821 |
|
final DoubleBinaryOperator reducer; |
5822 |
|
if ((transformer = this.transformer) != null && |
5823 |
|
(reducer = this.reducer) != null) { |
5824 |
|
double r = this.basis; |
5825 |
< |
for (int b; (b = preSplit()) > 0;) |
5825 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
5826 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
5827 |
> |
addToPendingCount(1); |
5828 |
|
(rights = new MapReduceMappingsToDoubleTask<K,V> |
5829 |
< |
(map, this, b, rights, transformer, r, reducer)).fork(); |
5830 |
< |
V v; |
5831 |
< |
while ((v = advance()) != null) |
5832 |
< |
r = reducer.applyAsDouble(r, transformer.applyAsDouble(nextKey, v)); |
5829 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
5830 |
> |
rights, transformer, r, reducer)).fork(); |
5831 |
> |
} |
5832 |
> |
for (Node<K,V> p; (p = advance()) != null; ) |
5833 |
> |
r = reducer.applyAsDouble(r, transformer.applyAsDouble(p.key, p.val)); |
5834 |
|
result = r; |
5835 |
|
CountedCompleter<?> c; |
5836 |
|
for (c = firstComplete(); c != null; c = c.nextComplete()) { |
5837 |
+ |
@SuppressWarnings("unchecked") |
5838 |
|
MapReduceMappingsToDoubleTask<K,V> |
5839 |
|
t = (MapReduceMappingsToDoubleTask<K,V>)c, |
5840 |
|
s = t.rights; |
5847 |
|
} |
5848 |
|
} |
5849 |
|
|
5850 |
< |
@SuppressWarnings("serial") static final class MapReduceKeysToLongTask<K,V> |
5851 |
< |
extends Traverser<K,V,Long> { |
5850 |
> |
@SuppressWarnings("serial") |
5851 |
> |
static final class MapReduceKeysToLongTask<K,V> |
5852 |
> |
extends BulkTask<K,V,Long> { |
5853 |
|
final ToLongFunction<? super K> transformer; |
5854 |
|
final LongBinaryOperator reducer; |
5855 |
|
final long basis; |
5856 |
|
long result; |
5857 |
|
MapReduceKeysToLongTask<K,V> rights, nextRight; |
5858 |
|
MapReduceKeysToLongTask |
5859 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
5859 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
5860 |
|
MapReduceKeysToLongTask<K,V> nextRight, |
5861 |
|
ToLongFunction<? super K> transformer, |
5862 |
|
long basis, |
5863 |
|
LongBinaryOperator reducer) { |
5864 |
< |
super(m, p, b); this.nextRight = nextRight; |
5864 |
> |
super(p, b, i, f, t); this.nextRight = nextRight; |
5865 |
|
this.transformer = transformer; |
5866 |
|
this.basis = basis; this.reducer = reducer; |
5867 |
|
} |
5868 |
|
public final Long getRawResult() { return result; } |
5869 |
< |
@SuppressWarnings("unchecked") public final void compute() { |
5869 |
> |
public final void compute() { |
5870 |
|
final ToLongFunction<? super K> transformer; |
5871 |
|
final LongBinaryOperator reducer; |
5872 |
|
if ((transformer = this.transformer) != null && |
5873 |
|
(reducer = this.reducer) != null) { |
5874 |
|
long r = this.basis; |
5875 |
< |
for (int b; (b = preSplit()) > 0;) |
5875 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
5876 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
5877 |
> |
addToPendingCount(1); |
5878 |
|
(rights = new MapReduceKeysToLongTask<K,V> |
5879 |
< |
(map, this, b, rights, transformer, r, reducer)).fork(); |
5880 |
< |
while (advance() != null) |
5881 |
< |
r = reducer.applyAsLong(r, transformer.applyAsLong(nextKey)); |
5879 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
5880 |
> |
rights, transformer, r, reducer)).fork(); |
5881 |
> |
} |
5882 |
> |
for (Node<K,V> p; (p = advance()) != null; ) |
5883 |
> |
r = reducer.applyAsLong(r, transformer.applyAsLong(p.key)); |
5884 |
|
result = r; |
5885 |
|
CountedCompleter<?> c; |
5886 |
|
for (c = firstComplete(); c != null; c = c.nextComplete()) { |
5887 |
+ |
@SuppressWarnings("unchecked") |
5888 |
|
MapReduceKeysToLongTask<K,V> |
5889 |
|
t = (MapReduceKeysToLongTask<K,V>)c, |
5890 |
|
s = t.rights; |
5897 |
|
} |
5898 |
|
} |
5899 |
|
|
5900 |
< |
@SuppressWarnings("serial") static final class MapReduceValuesToLongTask<K,V> |
5901 |
< |
extends Traverser<K,V,Long> { |
5900 |
> |
@SuppressWarnings("serial") |
5901 |
> |
static final class MapReduceValuesToLongTask<K,V> |
5902 |
> |
extends BulkTask<K,V,Long> { |
5903 |
|
final ToLongFunction<? super V> transformer; |
5904 |
|
final LongBinaryOperator reducer; |
5905 |
|
final long basis; |
5906 |
|
long result; |
5907 |
|
MapReduceValuesToLongTask<K,V> rights, nextRight; |
5908 |
|
MapReduceValuesToLongTask |
5909 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
5909 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
5910 |
|
MapReduceValuesToLongTask<K,V> nextRight, |
5911 |
|
ToLongFunction<? super V> transformer, |
5912 |
|
long basis, |
5913 |
|
LongBinaryOperator reducer) { |
5914 |
< |
super(m, p, b); this.nextRight = nextRight; |
5914 |
> |
super(p, b, i, f, t); this.nextRight = nextRight; |
5915 |
|
this.transformer = transformer; |
5916 |
|
this.basis = basis; this.reducer = reducer; |
5917 |
|
} |
5918 |
|
public final Long getRawResult() { return result; } |
5919 |
< |
@SuppressWarnings("unchecked") public final void compute() { |
5919 |
> |
public final void compute() { |
5920 |
|
final ToLongFunction<? super V> transformer; |
5921 |
|
final LongBinaryOperator reducer; |
5922 |
|
if ((transformer = this.transformer) != null && |
5923 |
|
(reducer = this.reducer) != null) { |
5924 |
|
long r = this.basis; |
5925 |
< |
for (int b; (b = preSplit()) > 0;) |
5925 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
5926 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
5927 |
> |
addToPendingCount(1); |
5928 |
|
(rights = new MapReduceValuesToLongTask<K,V> |
5929 |
< |
(map, this, b, rights, transformer, r, reducer)).fork(); |
5930 |
< |
V v; |
5931 |
< |
while ((v = advance()) != null) |
5932 |
< |
r = reducer.applyAsLong(r, transformer.applyAsLong(v)); |
5929 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
5930 |
> |
rights, transformer, r, reducer)).fork(); |
5931 |
> |
} |
5932 |
> |
for (Node<K,V> p; (p = advance()) != null; ) |
5933 |
> |
r = reducer.applyAsLong(r, transformer.applyAsLong(p.val)); |
5934 |
|
result = r; |
5935 |
|
CountedCompleter<?> c; |
5936 |
|
for (c = firstComplete(); c != null; c = c.nextComplete()) { |
5937 |
+ |
@SuppressWarnings("unchecked") |
5938 |
|
MapReduceValuesToLongTask<K,V> |
5939 |
|
t = (MapReduceValuesToLongTask<K,V>)c, |
5940 |
|
s = t.rights; |
5947 |
|
} |
5948 |
|
} |
5949 |
|
|
5950 |
< |
@SuppressWarnings("serial") static final class MapReduceEntriesToLongTask<K,V> |
5951 |
< |
extends Traverser<K,V,Long> { |
5950 |
> |
@SuppressWarnings("serial") |
5951 |
> |
static final class MapReduceEntriesToLongTask<K,V> |
5952 |
> |
extends BulkTask<K,V,Long> { |
5953 |
|
final ToLongFunction<Map.Entry<K,V>> transformer; |
5954 |
|
final LongBinaryOperator reducer; |
5955 |
|
final long basis; |
5956 |
|
long result; |
5957 |
|
MapReduceEntriesToLongTask<K,V> rights, nextRight; |
5958 |
|
MapReduceEntriesToLongTask |
5959 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
5959 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
5960 |
|
MapReduceEntriesToLongTask<K,V> nextRight, |
5961 |
|
ToLongFunction<Map.Entry<K,V>> transformer, |
5962 |
|
long basis, |
5963 |
|
LongBinaryOperator reducer) { |
5964 |
< |
super(m, p, b); this.nextRight = nextRight; |
5964 |
> |
super(p, b, i, f, t); this.nextRight = nextRight; |
5965 |
|
this.transformer = transformer; |
5966 |
|
this.basis = basis; this.reducer = reducer; |
5967 |
|
} |
5968 |
|
public final Long getRawResult() { return result; } |
5969 |
< |
@SuppressWarnings("unchecked") public final void compute() { |
5969 |
> |
public final void compute() { |
5970 |
|
final ToLongFunction<Map.Entry<K,V>> transformer; |
5971 |
|
final LongBinaryOperator reducer; |
5972 |
|
if ((transformer = this.transformer) != null && |
5973 |
|
(reducer = this.reducer) != null) { |
5974 |
|
long r = this.basis; |
5975 |
< |
for (int b; (b = preSplit()) > 0;) |
5975 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
5976 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
5977 |
> |
addToPendingCount(1); |
5978 |
|
(rights = new MapReduceEntriesToLongTask<K,V> |
5979 |
< |
(map, this, b, rights, transformer, r, reducer)).fork(); |
5980 |
< |
V v; |
5981 |
< |
while ((v = advance()) != null) |
5982 |
< |
r = reducer.applyAsLong(r, transformer.applyAsLong(entryFor(nextKey, v))); |
5979 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
5980 |
> |
rights, transformer, r, reducer)).fork(); |
5981 |
> |
} |
5982 |
> |
for (Node<K,V> p; (p = advance()) != null; ) |
5983 |
> |
r = reducer.applyAsLong(r, transformer.applyAsLong(p)); |
5984 |
|
result = r; |
5985 |
|
CountedCompleter<?> c; |
5986 |
|
for (c = firstComplete(); c != null; c = c.nextComplete()) { |
5987 |
+ |
@SuppressWarnings("unchecked") |
5988 |
|
MapReduceEntriesToLongTask<K,V> |
5989 |
|
t = (MapReduceEntriesToLongTask<K,V>)c, |
5990 |
|
s = t.rights; |
5997 |
|
} |
5998 |
|
} |
5999 |
|
|
6000 |
< |
@SuppressWarnings("serial") static final class MapReduceMappingsToLongTask<K,V> |
6001 |
< |
extends Traverser<K,V,Long> { |
6000 |
> |
@SuppressWarnings("serial") |
6001 |
> |
static final class MapReduceMappingsToLongTask<K,V> |
6002 |
> |
extends BulkTask<K,V,Long> { |
6003 |
|
final ToLongBiFunction<? super K, ? super V> transformer; |
6004 |
|
final LongBinaryOperator reducer; |
6005 |
|
final long basis; |
6006 |
|
long result; |
6007 |
|
MapReduceMappingsToLongTask<K,V> rights, nextRight; |
6008 |
|
MapReduceMappingsToLongTask |
6009 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
6009 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
6010 |
|
MapReduceMappingsToLongTask<K,V> nextRight, |
6011 |
|
ToLongBiFunction<? super K, ? super V> transformer, |
6012 |
|
long basis, |
6013 |
|
LongBinaryOperator reducer) { |
6014 |
< |
super(m, p, b); this.nextRight = nextRight; |
6014 |
> |
super(p, b, i, f, t); this.nextRight = nextRight; |
6015 |
|
this.transformer = transformer; |
6016 |
|
this.basis = basis; this.reducer = reducer; |
6017 |
|
} |
6018 |
|
public final Long getRawResult() { return result; } |
6019 |
< |
@SuppressWarnings("unchecked") public final void compute() { |
6019 |
> |
public final void compute() { |
6020 |
|
final ToLongBiFunction<? super K, ? super V> transformer; |
6021 |
|
final LongBinaryOperator reducer; |
6022 |
|
if ((transformer = this.transformer) != null && |
6023 |
|
(reducer = this.reducer) != null) { |
6024 |
|
long r = this.basis; |
6025 |
< |
for (int b; (b = preSplit()) > 0;) |
6025 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
6026 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
6027 |
> |
addToPendingCount(1); |
6028 |
|
(rights = new MapReduceMappingsToLongTask<K,V> |
6029 |
< |
(map, this, b, rights, transformer, r, reducer)).fork(); |
6030 |
< |
V v; |
6031 |
< |
while ((v = advance()) != null) |
6032 |
< |
r = reducer.applyAsLong(r, transformer.applyAsLong(nextKey, v)); |
6029 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
6030 |
> |
rights, transformer, r, reducer)).fork(); |
6031 |
> |
} |
6032 |
> |
for (Node<K,V> p; (p = advance()) != null; ) |
6033 |
> |
r = reducer.applyAsLong(r, transformer.applyAsLong(p.key, p.val)); |
6034 |
|
result = r; |
6035 |
|
CountedCompleter<?> c; |
6036 |
|
for (c = firstComplete(); c != null; c = c.nextComplete()) { |
6037 |
+ |
@SuppressWarnings("unchecked") |
6038 |
|
MapReduceMappingsToLongTask<K,V> |
6039 |
|
t = (MapReduceMappingsToLongTask<K,V>)c, |
6040 |
|
s = t.rights; |
6047 |
|
} |
6048 |
|
} |
6049 |
|
|
6050 |
< |
@SuppressWarnings("serial") static final class MapReduceKeysToIntTask<K,V> |
6051 |
< |
extends Traverser<K,V,Integer> { |
6050 |
> |
@SuppressWarnings("serial") |
6051 |
> |
static final class MapReduceKeysToIntTask<K,V> |
6052 |
> |
extends BulkTask<K,V,Integer> { |
6053 |
|
final ToIntFunction<? super K> transformer; |
6054 |
|
final IntBinaryOperator reducer; |
6055 |
|
final int basis; |
6056 |
|
int result; |
6057 |
|
MapReduceKeysToIntTask<K,V> rights, nextRight; |
6058 |
|
MapReduceKeysToIntTask |
6059 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
6059 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
6060 |
|
MapReduceKeysToIntTask<K,V> nextRight, |
6061 |
|
ToIntFunction<? super K> transformer, |
6062 |
|
int basis, |
6063 |
|
IntBinaryOperator reducer) { |
6064 |
< |
super(m, p, b); this.nextRight = nextRight; |
6064 |
> |
super(p, b, i, f, t); this.nextRight = nextRight; |
6065 |
|
this.transformer = transformer; |
6066 |
|
this.basis = basis; this.reducer = reducer; |
6067 |
|
} |
6068 |
|
public final Integer getRawResult() { return result; } |
6069 |
< |
@SuppressWarnings("unchecked") public final void compute() { |
6069 |
> |
public final void compute() { |
6070 |
|
final ToIntFunction<? super K> transformer; |
6071 |
|
final IntBinaryOperator reducer; |
6072 |
|
if ((transformer = this.transformer) != null && |
6073 |
|
(reducer = this.reducer) != null) { |
6074 |
|
int r = this.basis; |
6075 |
< |
for (int b; (b = preSplit()) > 0;) |
6075 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
6076 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
6077 |
> |
addToPendingCount(1); |
6078 |
|
(rights = new MapReduceKeysToIntTask<K,V> |
6079 |
< |
(map, this, b, rights, transformer, r, reducer)).fork(); |
6080 |
< |
while (advance() != null) |
6081 |
< |
r = reducer.applyAsInt(r, transformer.applyAsInt(nextKey)); |
6079 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
6080 |
> |
rights, transformer, r, reducer)).fork(); |
6081 |
> |
} |
6082 |
> |
for (Node<K,V> p; (p = advance()) != null; ) |
6083 |
> |
r = reducer.applyAsInt(r, transformer.applyAsInt(p.key)); |
6084 |
|
result = r; |
6085 |
|
CountedCompleter<?> c; |
6086 |
|
for (c = firstComplete(); c != null; c = c.nextComplete()) { |
6087 |
+ |
@SuppressWarnings("unchecked") |
6088 |
|
MapReduceKeysToIntTask<K,V> |
6089 |
|
t = (MapReduceKeysToIntTask<K,V>)c, |
6090 |
|
s = t.rights; |
6097 |
|
} |
6098 |
|
} |
6099 |
|
|
6100 |
< |
@SuppressWarnings("serial") static final class MapReduceValuesToIntTask<K,V> |
6101 |
< |
extends Traverser<K,V,Integer> { |
6100 |
> |
@SuppressWarnings("serial") |
6101 |
> |
static final class MapReduceValuesToIntTask<K,V> |
6102 |
> |
extends BulkTask<K,V,Integer> { |
6103 |
|
final ToIntFunction<? super V> transformer; |
6104 |
|
final IntBinaryOperator reducer; |
6105 |
|
final int basis; |
6106 |
|
int result; |
6107 |
|
MapReduceValuesToIntTask<K,V> rights, nextRight; |
6108 |
|
MapReduceValuesToIntTask |
6109 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
6109 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
6110 |
|
MapReduceValuesToIntTask<K,V> nextRight, |
6111 |
|
ToIntFunction<? super V> transformer, |
6112 |
|
int basis, |
6113 |
|
IntBinaryOperator reducer) { |
6114 |
< |
super(m, p, b); this.nextRight = nextRight; |
6114 |
> |
super(p, b, i, f, t); this.nextRight = nextRight; |
6115 |
|
this.transformer = transformer; |
6116 |
|
this.basis = basis; this.reducer = reducer; |
6117 |
|
} |
6118 |
|
public final Integer getRawResult() { return result; } |
6119 |
< |
@SuppressWarnings("unchecked") public final void compute() { |
6119 |
> |
public final void compute() { |
6120 |
|
final ToIntFunction<? super V> transformer; |
6121 |
|
final IntBinaryOperator reducer; |
6122 |
|
if ((transformer = this.transformer) != null && |
6123 |
|
(reducer = this.reducer) != null) { |
6124 |
|
int r = this.basis; |
6125 |
< |
for (int b; (b = preSplit()) > 0;) |
6125 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
6126 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
6127 |
> |
addToPendingCount(1); |
6128 |
|
(rights = new MapReduceValuesToIntTask<K,V> |
6129 |
< |
(map, this, b, rights, transformer, r, reducer)).fork(); |
6130 |
< |
V v; |
6131 |
< |
while ((v = advance()) != null) |
6132 |
< |
r = reducer.applyAsInt(r, transformer.applyAsInt(v)); |
6129 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
6130 |
> |
rights, transformer, r, reducer)).fork(); |
6131 |
> |
} |
6132 |
> |
for (Node<K,V> p; (p = advance()) != null; ) |
6133 |
> |
r = reducer.applyAsInt(r, transformer.applyAsInt(p.val)); |
6134 |
|
result = r; |
6135 |
|
CountedCompleter<?> c; |
6136 |
|
for (c = firstComplete(); c != null; c = c.nextComplete()) { |
6137 |
+ |
@SuppressWarnings("unchecked") |
6138 |
|
MapReduceValuesToIntTask<K,V> |
6139 |
|
t = (MapReduceValuesToIntTask<K,V>)c, |
6140 |
|
s = t.rights; |
6147 |
|
} |
6148 |
|
} |
6149 |
|
|
6150 |
< |
@SuppressWarnings("serial") static final class MapReduceEntriesToIntTask<K,V> |
6151 |
< |
extends Traverser<K,V,Integer> { |
6150 |
> |
@SuppressWarnings("serial") |
6151 |
> |
static final class MapReduceEntriesToIntTask<K,V> |
6152 |
> |
extends BulkTask<K,V,Integer> { |
6153 |
|
final ToIntFunction<Map.Entry<K,V>> transformer; |
6154 |
|
final IntBinaryOperator reducer; |
6155 |
|
final int basis; |
6156 |
|
int result; |
6157 |
|
MapReduceEntriesToIntTask<K,V> rights, nextRight; |
6158 |
|
MapReduceEntriesToIntTask |
6159 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
6159 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
6160 |
|
MapReduceEntriesToIntTask<K,V> nextRight, |
6161 |
|
ToIntFunction<Map.Entry<K,V>> transformer, |
6162 |
|
int basis, |
6163 |
|
IntBinaryOperator reducer) { |
6164 |
< |
super(m, p, b); this.nextRight = nextRight; |
6164 |
> |
super(p, b, i, f, t); this.nextRight = nextRight; |
6165 |
|
this.transformer = transformer; |
6166 |
|
this.basis = basis; this.reducer = reducer; |
6167 |
|
} |
6168 |
|
public final Integer getRawResult() { return result; } |
6169 |
< |
@SuppressWarnings("unchecked") public final void compute() { |
6169 |
> |
public final void compute() { |
6170 |
|
final ToIntFunction<Map.Entry<K,V>> transformer; |
6171 |
|
final IntBinaryOperator reducer; |
6172 |
|
if ((transformer = this.transformer) != null && |
6173 |
|
(reducer = this.reducer) != null) { |
6174 |
|
int r = this.basis; |
6175 |
< |
for (int b; (b = preSplit()) > 0;) |
6175 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
6176 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
6177 |
> |
addToPendingCount(1); |
6178 |
|
(rights = new MapReduceEntriesToIntTask<K,V> |
6179 |
< |
(map, this, b, rights, transformer, r, reducer)).fork(); |
6180 |
< |
V v; |
6181 |
< |
while ((v = advance()) != null) |
6182 |
< |
r = reducer.applyAsInt(r, transformer.applyAsInt(entryFor(nextKey, |
6183 |
< |
v))); |
6179 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
6180 |
> |
rights, transformer, r, reducer)).fork(); |
6181 |
> |
} |
6182 |
> |
for (Node<K,V> p; (p = advance()) != null; ) |
6183 |
> |
r = reducer.applyAsInt(r, transformer.applyAsInt(p)); |
6184 |
|
result = r; |
6185 |
|
CountedCompleter<?> c; |
6186 |
|
for (c = firstComplete(); c != null; c = c.nextComplete()) { |
6187 |
+ |
@SuppressWarnings("unchecked") |
6188 |
|
MapReduceEntriesToIntTask<K,V> |
6189 |
|
t = (MapReduceEntriesToIntTask<K,V>)c, |
6190 |
|
s = t.rights; |
6197 |
|
} |
6198 |
|
} |
6199 |
|
|
6200 |
< |
@SuppressWarnings("serial") static final class MapReduceMappingsToIntTask<K,V> |
6201 |
< |
extends Traverser<K,V,Integer> { |
6200 |
> |
@SuppressWarnings("serial") |
6201 |
> |
static final class MapReduceMappingsToIntTask<K,V> |
6202 |
> |
extends BulkTask<K,V,Integer> { |
6203 |
|
final ToIntBiFunction<? super K, ? super V> transformer; |
6204 |
|
final IntBinaryOperator reducer; |
6205 |
|
final int basis; |
6206 |
|
int result; |
6207 |
|
MapReduceMappingsToIntTask<K,V> rights, nextRight; |
6208 |
|
MapReduceMappingsToIntTask |
6209 |
< |
(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b, |
6209 |
> |
(BulkTask<K,V,?> p, int b, int i, int f, Node<K,V>[] t, |
6210 |
|
MapReduceMappingsToIntTask<K,V> nextRight, |
6211 |
|
ToIntBiFunction<? super K, ? super V> transformer, |
6212 |
|
int basis, |
6213 |
|
IntBinaryOperator reducer) { |
6214 |
< |
super(m, p, b); this.nextRight = nextRight; |
6214 |
> |
super(p, b, i, f, t); this.nextRight = nextRight; |
6215 |
|
this.transformer = transformer; |
6216 |
|
this.basis = basis; this.reducer = reducer; |
6217 |
|
} |
6218 |
|
public final Integer getRawResult() { return result; } |
6219 |
< |
@SuppressWarnings("unchecked") public final void compute() { |
6219 |
> |
public final void compute() { |
6220 |
|
final ToIntBiFunction<? super K, ? super V> transformer; |
6221 |
|
final IntBinaryOperator reducer; |
6222 |
|
if ((transformer = this.transformer) != null && |
6223 |
|
(reducer = this.reducer) != null) { |
6224 |
|
int r = this.basis; |
6225 |
< |
for (int b; (b = preSplit()) > 0;) |
6225 |
> |
for (int i = baseIndex, f, h; batch > 0 && |
6226 |
> |
(h = ((f = baseLimit) + i) >>> 1) > i;) { |
6227 |
> |
addToPendingCount(1); |
6228 |
|
(rights = new MapReduceMappingsToIntTask<K,V> |
6229 |
< |
(map, this, b, rights, transformer, r, reducer)).fork(); |
6230 |
< |
V v; |
6231 |
< |
while ((v = advance()) != null) |
6232 |
< |
r = reducer.applyAsInt(r, transformer.applyAsInt(nextKey, v)); |
6229 |
> |
(this, batch >>>= 1, baseLimit = h, f, tab, |
6230 |
> |
rights, transformer, r, reducer)).fork(); |
6231 |
> |
} |
6232 |
> |
for (Node<K,V> p; (p = advance()) != null; ) |
6233 |
> |
r = reducer.applyAsInt(r, transformer.applyAsInt(p.key, p.val)); |
6234 |
|
result = r; |
6235 |
|
CountedCompleter<?> c; |
6236 |
|
for (c = firstComplete(); c != null; c = c.nextComplete()) { |
6237 |
+ |
@SuppressWarnings("unchecked") |
6238 |
|
MapReduceMappingsToIntTask<K,V> |
6239 |
|
t = (MapReduceMappingsToIntTask<K,V>)c, |
6240 |
|
s = t.rights; |
6251 |
|
private static final sun.misc.Unsafe U; |
6252 |
|
private static final long SIZECTL; |
6253 |
|
private static final long TRANSFERINDEX; |
6784 |
– |
private static final long TRANSFERORIGIN; |
6254 |
|
private static final long BASECOUNT; |
6255 |
|
private static final long CELLSBUSY; |
6256 |
|
private static final long CELLVALUE; |
6265 |
|
(k.getDeclaredField("sizeCtl")); |
6266 |
|
TRANSFERINDEX = U.objectFieldOffset |
6267 |
|
(k.getDeclaredField("transferIndex")); |
6799 |
– |
TRANSFERORIGIN = U.objectFieldOffset |
6800 |
– |
(k.getDeclaredField("transferOrigin")); |
6268 |
|
BASECOUNT = U.objectFieldOffset |
6269 |
|
(k.getDeclaredField("baseCount")); |
6270 |
|
CELLSBUSY = U.objectFieldOffset |
6271 |
|
(k.getDeclaredField("cellsBusy")); |
6272 |
< |
Class<?> ck = Cell.class; |
6272 |
> |
Class<?> ck = CounterCell.class; |
6273 |
|
CELLVALUE = U.objectFieldOffset |
6274 |
|
(ck.getDeclaredField("value")); |
6275 |
< |
Class<?> sc = Node[].class; |
6276 |
< |
ABASE = U.arrayBaseOffset(sc); |
6277 |
< |
int scale = U.arrayIndexScale(sc); |
6275 |
> |
Class<?> ak = Node[].class; |
6276 |
> |
ABASE = U.arrayBaseOffset(ak); |
6277 |
> |
int scale = U.arrayIndexScale(ak); |
6278 |
|
if ((scale & (scale - 1)) != 0) |
6279 |
|
throw new Error("data type scale not a power of two"); |
6280 |
|
ASHIFT = 31 - Integer.numberOfLeadingZeros(scale); |
6282 |
|
throw new Error(e); |
6283 |
|
} |
6284 |
|
} |
6818 |
– |
|
6285 |
|
} |