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Comparing jsr166/src/jsr166e/ConcurrentHashMapV8.java (file contents):
Revision 1.58 by jsr166, Tue Aug 14 05:55:08 2012 UTC vs.
Revision 1.90 by dl, Tue Jan 22 20:17:55 2013 UTC

#	Line 5 | Line 5
5		*/
6
7		package jsr166e;
8	–	import jsr166e.LongAdder;
9	–	import jsr166e.ForkJoinPool;
10	–	import jsr166e.ForkJoinTask;
8
9		import java.util.Comparator;
10		import java.util.Arrays;
#	Line 24 | Line 21 | import java.util.Enumeration;
21		import java.util.ConcurrentModificationException;
22		import java.util.NoSuchElementException;
23		import java.util.concurrent.ConcurrentMap;
27	–	import java.util.concurrent.ThreadLocalRandom;
28	–	import java.util.concurrent.locks.LockSupport;
24		import java.util.concurrent.locks.AbstractQueuedSynchronizer;
25	+	import java.util.concurrent.atomic.AtomicInteger;
26		import java.util.concurrent.atomic.AtomicReference;
31	–
27		import java.io.Serializable;
28
29		/**
#	Line 43 | Line 38 | import java.io.Serializable;
38		* interoperable with {@code Hashtable} in programs that rely on its
39		* thread safety but not on its synchronization details.
40		*
41	<	* <p> Retrieval operations (including {@code get}) generally do not
41	>	* <p>Retrieval operations (including {@code get}) generally do not
42		* block, so may overlap with update operations (including {@code put}
43		* and {@code remove}). Retrievals reflect the results of the most
44		* recently <em>completed</em> update operations holding upon their
45	<	* onset.  For aggregate operations such as {@code putAll} and {@code
46	<	* clear}, concurrent retrievals may reflect insertion or removal of
47	<	* only some entries.  Similarly, Iterators and Enumerations return
48	<	* elements reflecting the state of the hash table at some point at or
49	<	* since the creation of the iterator/enumeration.  They do
50	<	* <em>not</em> throw {@link ConcurrentModificationException}.
51	<	* However, iterators are designed to be used by only one thread at a
52	<	* time.  Bear in mind that the results of aggregate status methods
53	<	* including {@code size}, {@code isEmpty}, and {@code containsValue}
54	<	* are typically useful only when a map is not undergoing concurrent
55	<	* updates in other threads.  Otherwise the results of these methods
56	<	* reflect transient states that may be adequate for monitoring
57	<	* or estimation purposes, but not for program control.
45	>	* onset. (More formally, an update operation for a given key bears a
46	>	* <em>happens-before</em> relation with any (non-null) retrieval for
47	>	* that key reporting the updated value.)  For aggregate operations
48	>	* such as {@code putAll} and {@code clear}, concurrent retrievals may
49	>	* reflect insertion or removal of only some entries.  Similarly,
50	>	* Iterators and Enumerations return elements reflecting the state of
51	>	* the hash table at some point at or since the creation of the
52	>	* iterator/enumeration.  They do <em>not</em> throw {@link
53	>	* ConcurrentModificationException}.  However, iterators are designed
54	>	* to be used by only one thread at a time.  Bear in mind that the
55	>	* results of aggregate status methods including {@code size}, {@code
56	>	* isEmpty}, and {@code containsValue} are typically useful only when
57	>	* a map is not undergoing concurrent updates in other threads.
58	>	* Otherwise the results of these methods reflect transient states
59	>	* that may be adequate for monitoring or estimation purposes, but not
60	>	* for program control.
61		*
62	<	* <p> The table is dynamically expanded when there are too many
62	>	* <p>The table is dynamically expanded when there are too many
63		* collisions (i.e., keys that have distinct hash codes but fall into
64		* the same slot modulo the table size), with the expected average
65		* effect of maintaining roughly two bins per mapping (corresponding
#	Line 82 | Line 80 | import java.io.Serializable;
80		* {@code hashCode()} is a sure way to slow down performance of any
81		* hash table.
82		*
83	+	* <p>A {@link Set} projection of a ConcurrentHashMapV8 may be created
84	+	* (using {@link #newKeySet()} or {@link #newKeySet(int)}), or viewed
85	+	* (using {@link #keySet(Object)} when only keys are of interest, and the
86	+	* mapped values are (perhaps transiently) not used or all take the
87	+	* same mapping value.
88	+	*
89	+	* <p>A ConcurrentHashMapV8 can be used as scalable frequency map (a
90	+	* form of histogram or multiset) by using {@link LongAdder} values
91	+	* and initializing via {@link #computeIfAbsent}. For example, to add
92	+	* a count to a {@code ConcurrentHashMapV8<String,LongAdder> freqs}, you
93	+	* can use {@code freqs.computeIfAbsent(k -> new
94	+	* LongAdder()).increment();}
95	+	*
96		* <p>This class and its views and iterators implement all of the
97		* <em>optional</em> methods of the {@link Map} and {@link Iterator}
98		* interfaces.
99		*
100	<	* <p> Like {@link Hashtable} but unlike {@link HashMap}, this class
100	>	* <p>Like {@link Hashtable} but unlike {@link HashMap}, this class
101		* does <em>not</em> allow {@code null} to be used as a key or value.
102		*
103	+	* <p>ConcurrentHashMapV8s support sequential and parallel operations
104	+	* bulk operations. (Parallel forms use the {@link
105	+	* ForkJoinPool#commonPool()}). Tasks that may be used in other
106	+	* contexts are available in class {@link ForkJoinTasks}. These
107	+	* operations are designed to be safely, and often sensibly, applied
108	+	* even with maps that are being concurrently updated by other
109	+	* threads; for example, when computing a snapshot summary of the
110	+	* values in a shared registry.  There are three kinds of operation,
111	+	* each with four forms, accepting functions with Keys, Values,
112	+	* Entries, and (Key, Value) arguments and/or return values. Because
113	+	* the elements of a ConcurrentHashMapV8 are not ordered in any
114	+	* particular way, and may be processed in different orders in
115	+	* different parallel executions, the correctness of supplied
116	+	* functions should not depend on any ordering, or on any other
117	+	* objects or values that may transiently change while computation is
118	+	* in progress; and except for forEach actions, should ideally be
119	+	* side-effect-free.
120	+	*
121	+	* <ul>
122	+	* <li> forEach: Perform a given action on each element.
123	+	* A variant form applies a given transformation on each element
124	+	* before performing the action.</li>
125	+	*
126	+	* <li> search: Return the first available non-null result of
127	+	* applying a given function on each element; skipping further
128	+	* search when a result is found.</li>
129	+	*
130	+	* <li> reduce: Accumulate each element.  The supplied reduction
131	+	* function cannot rely on ordering (more formally, it should be
132	+	* both associative and commutative).  There are five variants:
133	+	*
134	+	* <ul>
135	+	*
136	+	* <li> Plain reductions. (There is not a form of this method for
137	+	* (key, value) function arguments since there is no corresponding
138	+	* return type.)</li>
139	+	*
140	+	* <li> Mapped reductions that accumulate the results of a given
141	+	* function applied to each element.</li>
142	+	*
143	+	* <li> Reductions to scalar doubles, longs, and ints, using a
144	+	* given basis value.</li>
145	+	*
146	+	* </li>
147	+	* </ul>
148	+	* </ul>
149	+	*
150	+	* <p>The concurrency properties of bulk operations follow
151	+	* from those of ConcurrentHashMapV8: Any non-null result returned
152	+	* from {@code get(key)} and related access methods bears a
153	+	* happens-before relation with the associated insertion or
154	+	* update.  The result of any bulk operation reflects the
155	+	* composition of these per-element relations (but is not
156	+	* necessarily atomic with respect to the map as a whole unless it
157	+	* is somehow known to be quiescent).  Conversely, because keys
158	+	* and values in the map are never null, null serves as a reliable
159	+	* atomic indicator of the current lack of any result.  To
160	+	* maintain this property, null serves as an implicit basis for
161	+	* all non-scalar reduction operations. For the double, long, and
162	+	* int versions, the basis should be one that, when combined with
163	+	* any other value, returns that other value (more formally, it
164	+	* should be the identity element for the reduction). Most common
165	+	* reductions have these properties; for example, computing a sum
166	+	* with basis 0 or a minimum with basis MAX_VALUE.
167	+	*
168	+	* <p>Search and transformation functions provided as arguments
169	+	* should similarly return null to indicate the lack of any result
170	+	* (in which case it is not used). In the case of mapped
171	+	* reductions, this also enables transformations to serve as
172	+	* filters, returning null (or, in the case of primitive
173	+	* specializations, the identity basis) if the element should not
174	+	* be combined. You can create compound transformations and
175	+	* filterings by composing them yourself under this "null means
176	+	* there is nothing there now" rule before using them in search or
177	+	* reduce operations.
178	+	*
179	+	* <p>Methods accepting and/or returning Entry arguments maintain
180	+	* key-value associations. They may be useful for example when
181	+	* finding the key for the greatest value. Note that "plain" Entry
182	+	* arguments can be supplied using {@code new
183	+	* AbstractMap.SimpleEntry(k,v)}.
184	+	*
185	+	* <p>Bulk operations may complete abruptly, throwing an
186	+	* exception encountered in the application of a supplied
187	+	* function. Bear in mind when handling such exceptions that other
188	+	* concurrently executing functions could also have thrown
189	+	* exceptions, or would have done so if the first exception had
190	+	* not occurred.
191	+	*
192	+	* <p>Speedups for parallel compared to sequential forms are common
193	+	* but not guaranteed.  Parallel operations involving brief functions
194	+	* on small maps may execute more slowly than sequential forms if the
195	+	* underlying work to parallelize the computation is more expensive
196	+	* than the computation itself.  Similarly, parallelization may not
197	+	* lead to much actual parallelism if all processors are busy
198	+	* performing unrelated tasks.
199	+	*
200	+	* <p>All arguments to all task methods must be non-null.
201	+	*
202	+	* <p><em>jsr166e note: During transition, this class
203	+	* uses nested functional interfaces with different names but the
204	+	* same forms as those expected for JDK8.</em>
205	+	*
206		* <p>This class is a member of the
207		* <a href="{@docRoot}/../technotes/guides/collections/index.html">
208		* Java Collections Framework</a>.
209		*
96	–	* <p><em>jsr166e note: This class is a candidate replacement for
97	–	* java.util.concurrent.ConcurrentHashMap.  During transition, this
98	–	* class declares and uses nested functional interfaces with different
99	–	* names but the same forms as those expected for JDK8.<em>
100	–	*
210		* @since 1.5
211		* @author Doug Lea
212		* @param <K> the type of keys maintained by this map
#	Line 114 | Line 223 | public class ConcurrentHashMapV8<K, V>
223		* portion of the elements, and so may be amenable to parallel
224		* execution.
225		*
226	<	* <p> This interface exports a subset of expected JDK8
226	>	* <p>This interface exports a subset of expected JDK8
227		* functionality.
228		*
229		* <p>Sample usage: Here is one (of the several) ways to compute
#	Line 186 | Line 295 | public class ConcurrentHashMapV8<K, V>
295		* the same or better than java.util.HashMap, and to support high
296		* initial insertion rates on an empty table by many threads.
297		*
298	<	* Each key-value mapping is held in a Node.  Because Node fields
299	<	* can contain special values, they are defined using plain Object
300	<	* types. Similarly in turn, all internal methods that use them
301	<	* work off Object types. And similarly, so do the internal
302	<	* methods of auxiliary iterator and view classes.  All public
303	<	* generic typed methods relay in/out of these internal methods,
304	<	* supplying null-checks and casts as needed. This also allows
305	<	* many of the public methods to be factored into a smaller number
306	<	* of internal methods (although sadly not so for the five
198	<	* variants of put-related operations). The validation-based
199	<	* approach explained below leads to a lot of code sprawl because
298	>	* Each key-value mapping is held in a Node.  Because Node key
299	>	* fields can contain special values, they are defined using plain
300	>	* Object types (not type "K"). This leads to a lot of explicit
301	>	* casting (and many explicit warning suppressions to tell
302	>	* compilers not to complain about it). It also allows some of the
303	>	* public methods to be factored into a smaller number of internal
304	>	* methods (although sadly not so for the five variants of
305	>	* put-related operations). The validation-based approach
306	>	* explained below leads to a lot of code sprawl because
307		* retry-control precludes factoring into smaller methods.
308		*
309		* The table is lazily initialized to a power-of-two size upon the
#	Line 210 | Line 317 | public class ConcurrentHashMapV8<K, V>
317		* as lookups check hash code and non-nullness of value before
318		* checking key equality.
319		*
320	<	* We use the top two bits of Node hash fields for control
321	<	* purposes -- they are available anyway because of addressing
322	<	* constraints.  As explained further below, these top bits are
323	<	* used as follows:
324	<	*  00 - Normal
325	<	*  01 - Locked
219	<	*  11 - Locked and may have a thread waiting for lock
220	<	*  10 - Node is a forwarding node
221	<	*
222	<	* The lower 30 bits of each Node's hash field contain a
223	<	* transformation of the key's hash code, except for forwarding
224	<	* nodes, for which the lower bits are zero (and so always have
225	<	* hash field == MOVED).
320	>	* We use the top (sign) bit of Node hash fields for control
321	>	* purposes -- it is available anyway because of addressing
322	>	* constraints.  Nodes with negative hash fields are forwarding
323	>	* nodes to either TreeBins or resized tables.  The lower 31 bits
324	>	* of each normal Node's hash field contain a transformation of
325	>	* the key's hash code.
326		*
327		* Insertion (via put or its variants) of the first node in an
328		* empty bin is performed by just CASing it to the bin.  This is
#	Line 231 | Line 331 | public class ConcurrentHashMapV8<K, V>
331		* delete, and replace) require locks.  We do not want to waste
332		* the space required to associate a distinct lock object with
333		* each bin, so instead use the first node of a bin list itself as
334	<	* a lock. Blocking support for these locks relies on the builtin
335	<	* "synchronized" monitors.  However, we also need a tryLock
236	<	* construction, so we overlay these by using bits of the Node
237	<	* hash field for lock control (see above), and so normally use
238	<	* builtin monitors only for blocking and signalling using
239	<	* wait/notifyAll constructions. See Node.tryAwaitLock.
334	>	* a lock. Locking support for these locks relies on builtin
335	>	* "synchronized" monitors.
336		*
337		* Using the first node of a list as a lock does not by itself
338		* suffice though: When a node is locked, any update must first
#	Line 298 | Line 394 | public class ConcurrentHashMapV8<K, V>
394		* iterators in the same way.
395		*
396		* The table is resized when occupancy exceeds a percentage
397	<	* threshold (nominally, 0.75, but see below).  Only a single
398	<	* thread performs the resize (using field "sizeCtl", to arrange
399	<	* exclusion), but the table otherwise remains usable for reads
400	<	* and updates. Resizing proceeds by transferring bins, one by
401	<	* one, from the table to the next table.  Because we are using
402	<	* power-of-two expansion, the elements from each bin must either
403	<	* stay at same index, or move with a power of two offset. We
404	<	* eliminate unnecessary node creation by catching cases where old
405	<	* nodes can be reused because their next fields won't change.  On
406	<	* average, only about one-sixth of them need cloning when a table
407	<	* doubles. The nodes they replace will be garbage collectable as
408	<	* soon as they are no longer referenced by any reader thread that
409	<	* may be in the midst of concurrently traversing table.  Upon
410	<	* transfer, the old table bin contains only a special forwarding
411	<	* node (with hash field "MOVED") that contains the next table as
412	<	* its key. On encountering a forwarding node, access and update
413	<	* operations restart, using the new table.
414	<	*
415	<	* Each bin transfer requires its bin lock. However, unlike other
416	<	* cases, a transfer can skip a bin if it fails to acquire its
417	<	* lock, and revisit it later (unless it is a TreeBin). Method
418	<	* rebuild maintains a buffer of TRANSFER_BUFFER_SIZE bins that
419	<	* have been skipped because of failure to acquire a lock, and
420	<	* blocks only if none are available (i.e., only very rarely).
421	<	* The transfer operation must also ensure that all accessible
422	<	* bins in both the old and new table are usable by any traversal.
423	<	* When there are no lock acquisition failures, this is arranged
424	<	* simply by proceeding from the last bin (table.length - 1) up
425	<	* towards the first.  Upon seeing a forwarding node, traversals
426	<	* (see class Iter) arrange to move to the new table
427	<	* without revisiting nodes.  However, when any node is skipped
428	<	* during a transfer, all earlier table bins may have become
429	<	* visible, so are initialized with a reverse-forwarding node back
430	<	* to the old table until the new ones are established. (This
431	<	* sometimes requires transiently locking a forwarding node, which
432	<	* is possible under the above encoding.) These more expensive
433	<	* mechanics trigger only when necessary.
397	>	* threshold (nominally, 0.75, but see below).  Any thread
398	>	* noticing an overfull bin may assist in resizing after the
399	>	* initiating thread allocates and sets up the replacement
400	>	* array. However, rather than stalling, these other threads may
401	>	* proceed with insertions etc.  The use of TreeBins shields us
402	>	* from the worst case effects of overfilling while resizes are in
403	>	* progress.  Resizing proceeds by transferring bins, one by one,
404	>	* from the table to the next table. To enable concurrency, the
405	>	* next table must be (incrementally) prefilled with place-holders
406	>	* serving as reverse forwarders to the old table.  Because we are
407	>	* using power-of-two expansion, the elements from each bin must
408	>	* either stay at same index, or move with a power of two
409	>	* offset. We eliminate unnecessary node creation by catching
410	>	* cases where old nodes can be reused because their next fields
411	>	* won't change.  On average, only about one-sixth of them need
412	>	* cloning when a table doubles. The nodes they replace will be
413	>	* garbage collectable as soon as they are no longer referenced by
414	>	* any reader thread that may be in the midst of concurrently
415	>	* traversing table.  Upon transfer, the old table bin contains
416	>	* only a special forwarding node (with hash field "MOVED") that
417	>	* contains the next table as its key. On encountering a
418	>	* forwarding node, access and update operations restart, using
419	>	* the new table.
420	>	*
421	>	* Each bin transfer requires its bin lock, which can stall
422	>	* waiting for locks while resizing. However, because other
423	>	* threads can join in and help resize rather than contend for
424	>	* locks, average aggregate waits become shorter as resizing
425	>	* progresses.  The transfer operation must also ensure that all
426	>	* accessible bins in both the old and new table are usable by any
427	>	* traversal.  This is arranged by proceeding from the last bin
428	>	* (table.length - 1) up towards the first.  Upon seeing a
429	>	* forwarding node, traversals (see class Traverser) arrange to
430	>	* move to the new table without revisiting nodes.  However, to
431	>	* ensure that no intervening nodes are skipped, bin splitting can
432	>	* only begin after the associated reverse-forwarders are in
433	>	* place.
434		*
435		* The traversal scheme also applies to partial traversals of
436		* ranges of bins (via an alternate Traverser constructor)
#	Line 349 | Line 445 | public class ConcurrentHashMapV8<K, V>
445		* These cases attempt to override the initial capacity settings,
446		* but harmlessly fail to take effect in cases of races.
447		*
448	<	* The element count is maintained using a LongAdder, which avoids
449	<	* contention on updates but can encounter cache thrashing if read
450	<	* too frequently during concurrent access. To avoid reading so
451	<	* often, resizing is attempted either when a bin lock is
452	<	* contended, or upon adding to a bin already holding two or more
453	<	* nodes (checked before adding in the xIfAbsent methods, after
454	<	* adding in others). Under uniform hash distributions, the
455	<	* probability of this occurring at threshold is around 13%,
456	<	* meaning that only about 1 in 8 puts check threshold (and after
457	<	* resizing, many fewer do so). But this approximation has high
458	<	* variance for small table sizes, so we check on any collision
459	<	* for sizes <= 64. The bulk putAll operation further reduces
460	<	* contention by only committing count updates upon these size
461	<	* checks.
448	>	* The element count is maintained using a specialization of
449	>	* LongAdder. We need to incorporate a specialization rather than
450	>	* just use a LongAdder in order to access implicit
451	>	* contention-sensing that leads to creation of multiple
452	>	* CounterCells.  The counter mechanics avoid contention on
453	>	* updates but can encounter cache thrashing if read too
454	>	* frequently during concurrent access. To avoid reading so often,
455	>	* resizing under contention is attempted only upon adding to a
456	>	* bin already holding two or more nodes. Under uniform hash
457	>	* distributions, the probability of this occurring at threshold
458	>	* is around 13%, meaning that only about 1 in 8 puts check
459	>	* threshold (and after resizing, many fewer do so). The bulk
460	>	* putAll operation further reduces contention by only committing
461	>	* count updates upon these size checks.
462		*
463		* Maintaining API and serialization compatibility with previous
464		* versions of this class introduces several oddities. Mainly: We
#	Line 413 | Line 509 | public class ConcurrentHashMapV8<K, V>
509		private static final float LOAD_FACTOR = 0.75f;
510
511		/**
416	–	* The buffer size for skipped bins during transfers. The
417	–	* value is arbitrary but should be large enough to avoid
418	–	* most locking stalls during resizes.
419	–	*/
420	–	private static final int TRANSFER_BUFFER_SIZE = 32;
421	–
422	–	/**
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.
515		*/
516		private static final int TREE_THRESHOLD = 8;
517
518	+	/**
519	+	* Minimum number of rebinnings per transfer step. Ranges are
520	+	* subdivided to allow multiple resizer threads.  This value
521	+	* serves as a lower bound to avoid resizers encountering
522	+	* excessive memory contention.  The value should be at least
523	+	* DEFAULT_CAPACITY.
524	+	*/
525	+	private static final int MIN_TRANSFER_STRIDE = 16;
526	+
527		/*
528	<	* Encodings for special uses of Node hash fields. See above for
431	<	* explanation.
528	>	* Encodings for Node hash fields. See above for explanation.
529		*/
530		static final int MOVED     = 0x80000000; // hash field for forwarding nodes
531	<	static final int LOCKED    = 0x40000000; // set/tested only as a bit
532	<	static final int WAITING   = 0xc0000000; // both bits set/tested together
533	<	static final int HASH_BITS = 0x3fffffff; // usable bits of normal node hash
531	>	static final int HASH_BITS = 0x7fffffff; // usable bits of normal node hash
532	>
533	>	/** Number of CPUS, to place bounds on some sizings */
534	>	static final int NCPU = Runtime.getRuntime().availableProcessors();
535	>
536	>	/* ---------------- Counters -------------- */
537	>
538	>	// Adapted from LongAdder and Striped64.
539	>	// See their internal docs for explanation.
540	>
541	>	// A padded cell for distributing counts
542	>	static final class CounterCell {
543	>	volatile long p0, p1, p2, p3, p4, p5, p6;
544	>	volatile long value;
545	>	volatile long q0, q1, q2, q3, q4, q5, q6;
546	>	CounterCell(long x) { value = x; }
547	>	}
548	>
549	>	/**
550	>	* Holder for the thread-local hash code determining which
551	>	* CounterCell to use. The code is initialized via the
552	>	* counterHashCodeGenerator, but may be moved upon collisions.
553	>	*/
554	>	static final class CounterHashCode {
555	>	int code;
556	>	}
557	>
558	>	/**
559	>	* Generates initial value for per-thread CounterHashCodes
560	>	*/
561	>	static final AtomicInteger counterHashCodeGenerator = new AtomicInteger();
562	>
563	>	/**
564	>	* Increment for counterHashCodeGenerator. See class ThreadLocal
565	>	* for explanation.
566	>	*/
567	>	static final int SEED_INCREMENT = 0x61c88647;
568	>
569	>	/**
570	>	* Per-thread counter hash codes. Shared across all instances.
571	>	*/
572	>	static final ThreadLocal<CounterHashCode> threadCounterHashCode =
573	>	new ThreadLocal<CounterHashCode>();
574
575		/* ---------------- Fields -------------- */
576
#	Line 441 | Line 578 | public class ConcurrentHashMapV8<K, V>
578		* The array of bins. Lazily initialized upon first insertion.
579		* Size is always a power of two. Accessed directly by iterators.
580		*/
581	<	transient volatile Node[] table;
581	>	transient volatile Node<V>[] table;
582
583		/**
584	<	* The counter maintaining number of elements.
584	>	* The next table to use; non-null only while resizing.
585		*/
586	<	private transient final LongAdder counter;
586	>	private transient volatile Node<V>[] nextTable;
587	>
588	>	/**
589	>	* Base counter value, used mainly when there is no contention,
590	>	* but also as a fallback during table initialization
591	>	* races. Updated via CAS.
592	>	*/
593	>	private transient volatile long baseCount;
594
595		/**
596		* Table initialization and resizing control.  When negative, the
597	<	* table is being initialized or resized. Otherwise, when table is
598	<	* null, holds the initial table size to use upon creation, or 0
599	<	* for default. After initialization, holds the next element count
600	<	* value upon which to resize the table.
597	>	* table is being initialized or resized: -1 for initialization,
598	>	* else -(1 + the number of active resizing threads).  Otherwise,
599	>	* when table is null, holds the initial table size to use upon
600	>	* creation, or 0 for default. After initialization, holds the
601	>	* next element count value upon which to resize the table.
602		*/
603		private transient volatile int sizeCtl;
604
605	+	/**
606	+	* The next table index (plus one) to split while resizing.
607	+	*/
608	+	private transient volatile int transferIndex;
609	+
610	+	/**
611	+	* The least available table index to split while resizing.
612	+	*/
613	+	private transient volatile int transferOrigin;
614	+
615	+	/**
616	+	* Spinlock (locked via CAS) used when resizing and/or creating Cells.
617	+	*/
618	+	private transient volatile int counterBusy;
619	+
620	+	/**
621	+	* Table of counter cells. When non-null, size is a power of 2.
622	+	*/
623	+	private transient volatile CounterCell[] counterCells;
624	+
625		// views
626	<	private transient KeySet<K,V> keySet;
627	<	private transient Values<K,V> values;
628	<	private transient EntrySet<K,V> entrySet;
626	>	private transient KeySetView<K,V> keySet;
627	>	private transient ValuesView<K,V> values;
628	>	private transient EntrySetView<K,V> entrySet;
629
630		/** For serialization compatibility. Null unless serialized; see below */
631		private Segment<K,V>[] segments;
#	Line 479 | Line 644 | public class ConcurrentHashMapV8<K, V>
644		* inline assignments below.
645		*/
646
647	<	static final Node tabAt(Node[] tab, int i) { // used by Iter
648	<	return (Node)UNSAFE.getObjectVolatile(tab, ((long)i<<ASHIFT)+ABASE);
647	>	@SuppressWarnings("unchecked") static final <V> Node<V> tabAt
648	>	(Node<V>[] tab, int i) { // used by Traverser
649	>	return (Node<V>)U.getObjectVolatile(tab, ((long)i << ASHIFT) + ABASE);
650		}
651
652	<	private static final boolean casTabAt(Node[] tab, int i, Node c, Node v) {
653	<	return UNSAFE.compareAndSwapObject(tab, ((long)i<<ASHIFT)+ABASE, c, v);
652	>	private static final <V> boolean casTabAt
653	>	(Node<V>[] tab, int i, Node<V> c, Node<V> v) {
654	>	return U.compareAndSwapObject(tab, ((long)i << ASHIFT) + ABASE, c, v);
655		}
656
657	<	private static final void setTabAt(Node[] tab, int i, Node v) {
658	<	UNSAFE.putObjectVolatile(tab, ((long)i<<ASHIFT)+ABASE, v);
657	>	private static final <V> void setTabAt
658	>	(Node<V>[] tab, int i, Node<V> v) {
659	>	U.putObjectVolatile(tab, ((long)i << ASHIFT) + ABASE, v);
660		}
661
662		/* ---------------- Nodes -------------- */
#	Line 503 | Line 671 | public class ConcurrentHashMapV8<K, V>
671		* before a val, but can only be used after checking val to be
672		* non-null.
673		*/
674	<	static class Node {
675	<	volatile int hash;
674	>	static class Node<V> {
675	>	final int hash;
676		final Object key;
677	<	volatile Object val;
678	<	volatile Node next;
677	>	volatile V val;
678	>	volatile Node<V> next;
679
680	<	Node(int hash, Object key, Object val, Node next) {
680	>	Node(int hash, Object key, V val, Node<V> next) {
681		this.hash = hash;
682		this.key = key;
683		this.val = val;
684		this.next = next;
685		}
518	–
519	–	/** CompareAndSet the hash field */
520	–	final boolean casHash(int cmp, int val) {
521	–	return UNSAFE.compareAndSwapInt(this, hashOffset, cmp, val);
522	–	}
523	–
524	–	/** The number of spins before blocking for a lock */
525	–	static final int MAX_SPINS =
526	–	Runtime.getRuntime().availableProcessors() > 1 ? 64 : 1;
527	–
528	–	/**
529	–	* Spins a while if LOCKED bit set and this node is the first
530	–	* of its bin, and then sets WAITING bits on hash field and
531	–	* blocks (once) if they are still set.  It is OK for this
532	–	* method to return even if lock is not available upon exit,
533	–	* which enables these simple single-wait mechanics.
534	–	*
535	–	* The corresponding signalling operation is performed within
536	–	* callers: Upon detecting that WAITING has been set when
537	–	* unlocking lock (via a failed CAS from non-waiting LOCKED
538	–	* state), unlockers acquire the sync lock and perform a
539	–	* notifyAll.
540	–	*/
541	–	final void tryAwaitLock(Node[] tab, int i) {
542	–	if (tab != null && i >= 0 && i < tab.length) { // bounds check
543	–	int r = ThreadLocalRandom.current().nextInt(); // randomize spins
544	–	int spins = MAX_SPINS, h;
545	–	while (tabAt(tab, i) == this && ((h = hash) & LOCKED) != 0) {
546	–	if (spins >= 0) {
547	–	r ^= r << 1; r ^= r >>> 3; r ^= r << 10; // xorshift
548	–	if (r >= 0 && --spins == 0)
549	–	Thread.yield();  // yield before block
550	–	}
551	–	else if (casHash(h, h | WAITING)) {
552	–	synchronized (this) {
553	–	if (tabAt(tab, i) == this &&
554	–	(hash & WAITING) == WAITING) {
555	–	try {
556	–	wait();
557	–	} catch (InterruptedException ie) {
558	–	Thread.currentThread().interrupt();
559	–	}
560	–	}
561	–	else
562	–	notifyAll(); // possibly won race vs signaller
563	–	}
564	–	break;
565	–	}
566	–	}
567	–	}
568	–	}
569	–
570	–	// Unsafe mechanics for casHash
571	–	private static final sun.misc.Unsafe UNSAFE;
572	–	private static final long hashOffset;
573	–
574	–	static {
575	–	try {
576	–	UNSAFE = getUnsafe();
577	–	Class<?> k = Node.class;
578	–	hashOffset = UNSAFE.objectFieldOffset
579	–	(k.getDeclaredField("hash"));
580	–	} catch (Exception e) {
581	–	throw new Error(e);
582	–	}
583	–	}
686		}
687
688		/* ---------------- TreeBins -------------- */
#	Line 588 | Line 690 | public class ConcurrentHashMapV8<K, V>
690		/**
691		* Nodes for use in TreeBins
692		*/
693	<	static final class TreeNode extends Node {
694	<	TreeNode parent;  // red-black tree links
695	<	TreeNode left;
696	<	TreeNode right;
697	<	TreeNode prev;    // needed to unlink next upon deletion
693	>	static final class TreeNode<V> extends Node<V> {
694	>	TreeNode<V> parent;  // red-black tree links
695	>	TreeNode<V> left;
696	>	TreeNode<V> right;
697	>	TreeNode<V> prev;    // needed to unlink next upon deletion
698		boolean red;
699
700	<	TreeNode(int hash, Object key, Object val, Node next, TreeNode parent) {
700	>	TreeNode(int hash, Object key, V val, Node<V> next, TreeNode<V> parent) {
701		super(hash, key, val, next);
702		this.parent = parent;
703		}
#	Line 644 | Line 746 | public class ConcurrentHashMapV8<K, V>
746		* and writers. Since we don't need to export full Lock API, we
747		* just override the minimal AQS methods and use them directly.
748		*/
749	<	static final class TreeBin extends AbstractQueuedSynchronizer {
749	>	static final class TreeBin<V> extends AbstractQueuedSynchronizer {
750		private static final long serialVersionUID = 2249069246763182397L;
751	<	transient TreeNode root;  // root of tree
752	<	transient TreeNode first; // head of next-pointer list
751	>	transient TreeNode<V> root;  // root of tree
752	>	transient TreeNode<V> first; // head of next-pointer list
753
754		/* AQS overrides */
755		public final boolean isHeldExclusively() { return getState() > 0; }
#	Line 678 | Line 780 | public class ConcurrentHashMapV8<K, V>
780		}
781
782		/** From CLR */
783	<	private void rotateLeft(TreeNode p) {
783	>	private void rotateLeft(TreeNode<V> p) {
784		if (p != null) {
785	<	TreeNode r = p.right, pp, rl;
785	>	TreeNode<V> r = p.right, pp, rl;
786		if ((rl = p.right = r.left) != null)
787		rl.parent = p;
788		if ((pp = r.parent = p.parent) == null)
#	Line 695 | Line 797 | public class ConcurrentHashMapV8<K, V>
797		}
798
799		/** From CLR */
800	<	private void rotateRight(TreeNode p) {
800	>	private void rotateRight(TreeNode<V> p) {
801		if (p != null) {
802	<	TreeNode l = p.left, pp, lr;
802	>	TreeNode<V> l = p.left, pp, lr;
803		if ((lr = p.left = l.right) != null)
804		lr.parent = p;
805		if ((pp = l.parent = p.parent) == null)
#	Line 715 | Line 817 | public class ConcurrentHashMapV8<K, V>
817		* Returns the TreeNode (or null if not found) for the given key
818		* starting at given root.
819		*/
820	<	@SuppressWarnings("unchecked") // suppress Comparable cast warning
821	<	final TreeNode getTreeNode(int h, Object k, TreeNode p) {
820	>	@SuppressWarnings("unchecked") final TreeNode<V> getTreeNode
821	>	(int h, Object k, TreeNode<V> p) {
822		Class<?> c = k.getClass();
823		while (p != null) {
824		int dir, ph;  Object pk; Class<?> pc;
#	Line 726 | Line 828 | public class ConcurrentHashMapV8<K, V>
828		if (c != (pc = pk.getClass()) ||
829		!(k instanceof Comparable) ||
830		(dir = ((Comparable)k).compareTo((Comparable)pk)) == 0) {
831	<	dir = (c == pc) ? 0 : c.getName().compareTo(pc.getName());
832	<	TreeNode r = null, s = null, pl, pr;
833	<	if (dir >= 0) {
834	<	if ((pl = p.left) != null && h <= pl.hash)
835	<	s = pl;
831	>	if ((dir = (c == pc) ? 0 :
832	>	c.getName().compareTo(pc.getName())) == 0) {
833	>	TreeNode<V> r = null, pl, pr; // check both sides
834	>	if ((pr = p.right) != null && h >= pr.hash &&
835	>	(r = getTreeNode(h, k, pr)) != null)
836	>	return r;
837	>	else if ((pl = p.left) != null && h <= pl.hash)
838	>	dir = -1;
839	>	else // nothing there
840	>	return null;
841		}
735	–	else if ((pr = p.right) != null && h >= pr.hash)
736	–	s = pr;
737	–	if (s != null && (r = getTreeNode(h, k, s)) != null)
738	–	return r;
842		}
843		}
844		else
#	Line 750 | Line 853 | public class ConcurrentHashMapV8<K, V>
853		* read-lock to call getTreeNode, but during failure to get
854		* lock, searches along next links.
855		*/
856	<	final Object getValue(int h, Object k) {
857	<	Node r = null;
856	>	final V getValue(int h, Object k) {
857	>	Node<V> r = null;
858		int c = getState(); // Must read lock state first
859	<	for (Node e = first; e != null; e = e.next) {
859	>	for (Node<V> e = first; e != null; e = e.next) {
860		if (c <= 0 && compareAndSetState(c, c - 1)) {
861		try {
862		r = getTreeNode(h, k, root);
#	Line 762 | Line 865 | public class ConcurrentHashMapV8<K, V>
865		}
866		break;
867		}
868	<	else if ((e.hash & HASH_BITS) == h && k.equals(e.key)) {
868	>	else if (e.hash == h && k.equals(e.key)) {
869		r = e;
870		break;
871		}
#	Line 776 | Line 879 | public class ConcurrentHashMapV8<K, V>
879		* Finds or adds a node.
880		* @return null if added
881		*/
882	<	@SuppressWarnings("unchecked") // suppress Comparable cast warning
883	<	final TreeNode putTreeNode(int h, Object k, Object v) {
882	>	@SuppressWarnings("unchecked") final TreeNode<V> putTreeNode
883	>	(int h, Object k, V v) {
884		Class<?> c = k.getClass();
885	<	TreeNode pp = root, p = null;
885	>	TreeNode<V> pp = root, p = null;
886		int dir = 0;
887		while (pp != null) { // find existing node or leaf to insert at
888		int ph;  Object pk; Class<?> pc;
#	Line 790 | Line 893 | public class ConcurrentHashMapV8<K, V>
893		if (c != (pc = pk.getClass()) ||
894		!(k instanceof Comparable) ||
895		(dir = ((Comparable)k).compareTo((Comparable)pk)) == 0) {
896	<	dir = (c == pc) ? 0 : c.getName().compareTo(pc.getName());
897	<	TreeNode r = null, s = null, pl, pr;
898	<	if (dir >= 0) {
899	<	if ((pl = p.left) != null && h <= pl.hash)
900	<	s = pl;
896	>	TreeNode<V> s = null, r = null, pr;
897	>	if ((dir = (c == pc) ? 0 :
898	>	c.getName().compareTo(pc.getName())) == 0) {
899	>	if ((pr = p.right) != null && h >= pr.hash &&
900	>	(r = getTreeNode(h, k, pr)) != null)
901	>	return r;
902	>	else // continue left
903	>	dir = -1;
904		}
905		else if ((pr = p.right) != null && h >= pr.hash)
906		s = pr;
#	Line 807 | Line 913 | public class ConcurrentHashMapV8<K, V>
913		pp = (dir > 0) ? p.right : p.left;
914		}
915
916	<	TreeNode f = first;
917	<	TreeNode x = first = new TreeNode(h, k, v, f, p);
916	>	TreeNode<V> f = first;
917	>	TreeNode<V> x = first = new TreeNode<V>(h, k, v, f, p);
918		if (p == null)
919		root = x;
920		else { // attach and rebalance; adapted from CLR
921	<	TreeNode xp, xpp;
921	>	TreeNode<V> xp, xpp;
922		if (f != null)
923		f.prev = x;
924		if (dir <= 0)
#	Line 822 | Line 928 | public class ConcurrentHashMapV8<K, V>
928		x.red = true;
929		while (x != null && (xp = x.parent) != null && xp.red &&
930		(xpp = xp.parent) != null) {
931	<	TreeNode xppl = xpp.left;
931	>	TreeNode<V> xppl = xpp.left;
932		if (xp == xppl) {
933	<	TreeNode y = xpp.right;
933	>	TreeNode<V> y = xpp.right;
934		if (y != null && y.red) {
935		y.red = false;
936		xp.red = false;
#	Line 846 | Line 952 | public class ConcurrentHashMapV8<K, V>
952		}
953		}
954		else {
955	<	TreeNode y = xppl;
955	>	TreeNode<V> y = xppl;
956		if (y != null && y.red) {
957		y.red = false;
958		xp.red = false;
#	Line 868 | Line 974 | public class ConcurrentHashMapV8<K, V>
974		}
975		}
976		}
977	<	TreeNode r = root;
977	>	TreeNode<V> r = root;
978		if (r != null && r.red)
979		r.red = false;
980		}
#	Line 883 | Line 989 | public class ConcurrentHashMapV8<K, V>
989		* that are accessible independently of lock. So instead we
990		* swap the tree linkages.
991		*/
992	<	final void deleteTreeNode(TreeNode p) {
993	<	TreeNode next = (TreeNode)p.next; // unlink traversal pointers
994	<	TreeNode pred = p.prev;
992	>	final void deleteTreeNode(TreeNode<V> p) {
993	>	TreeNode<V> next = (TreeNode<V>)p.next; // unlink traversal pointers
994	>	TreeNode<V> pred = p.prev;
995		if (pred == null)
996		first = next;
997		else
998		pred.next = next;
999		if (next != null)
1000		next.prev = pred;
1001	<	TreeNode replacement;
1002	<	TreeNode pl = p.left;
1003	<	TreeNode pr = p.right;
1001	>	TreeNode<V> replacement;
1002	>	TreeNode<V> pl = p.left;
1003	>	TreeNode<V> pr = p.right;
1004		if (pl != null && pr != null) {
1005	<	TreeNode s = pr, sl;
1005	>	TreeNode<V> s = pr, sl;
1006		while ((sl = s.left) != null) // find successor
1007		s = sl;
1008		boolean c = s.red; s.red = p.red; p.red = c; // swap colors
1009	<	TreeNode sr = s.right;
1010	<	TreeNode pp = p.parent;
1009	>	TreeNode<V> sr = s.right;
1010	>	TreeNode<V> pp = p.parent;
1011		if (s == pr) { // p was s's direct parent
1012		p.parent = s;
1013		s.right = p;
1014		}
1015		else {
1016	<	TreeNode sp = s.parent;
1016	>	TreeNode<V> sp = s.parent;
1017		if ((p.parent = sp) != null) {
1018		if (s == sp.left)
1019		sp.left = p;
#	Line 932 | Line 1038 | public class ConcurrentHashMapV8<K, V>
1038		}
1039		else
1040		replacement = (pl != null) ? pl : pr;
1041	<	TreeNode pp = p.parent;
1041	>	TreeNode<V> pp = p.parent;
1042		if (replacement == null) {
1043		if (pp == null) {
1044		root = null;
#	Line 951 | Line 1057 | public class ConcurrentHashMapV8<K, V>
1057		p.left = p.right = p.parent = null;
1058		}
1059		if (!p.red) { // rebalance, from CLR
1060	<	TreeNode x = replacement;
1060	>	TreeNode<V> x = replacement;
1061		while (x != null) {
1062	<	TreeNode xp, xpl;
1062	>	TreeNode<V> xp, xpl;
1063		if (x.red || (xp = x.parent) == null) {
1064		x.red = false;
1065		break;
1066		}
1067		if (x == (xpl = xp.left)) {
1068	<	TreeNode sib = xp.right;
1068	>	TreeNode<V> sib = xp.right;
1069		if (sib != null && sib.red) {
1070		sib.red = false;
1071		xp.red = true;
#	Line 969 | Line 1075 | public class ConcurrentHashMapV8<K, V>
1075		if (sib == null)
1076		x = xp;
1077		else {
1078	<	TreeNode sl = sib.left, sr = sib.right;
1078	>	TreeNode<V> sl = sib.left, sr = sib.right;
1079		if ((sr == null || !sr.red) &&
1080		(sl == null || !sl.red)) {
1081		sib.red = true;
#	Line 981 | Line 1087 | public class ConcurrentHashMapV8<K, V>
1087		sl.red = false;
1088		sib.red = true;
1089		rotateRight(sib);
1090	<	sib = (xp = x.parent) == null ? null : xp.right;
1090	>	sib = (xp = x.parent) == null ?
1091	>	null : xp.right;
1092		}
1093		if (sib != null) {
1094		sib.red = (xp == null) ? false : xp.red;
#	Line 997 | Line 1104 | public class ConcurrentHashMapV8<K, V>
1104		}
1105		}
1106		else { // symmetric
1107	<	TreeNode sib = xpl;
1107	>	TreeNode<V> sib = xpl;
1108		if (sib != null && sib.red) {
1109		sib.red = false;
1110		xp.red = true;
#	Line 1007 | Line 1114 | public class ConcurrentHashMapV8<K, V>
1114		if (sib == null)
1115		x = xp;
1116		else {
1117	<	TreeNode sl = sib.left, sr = sib.right;
1117	>	TreeNode<V> sl = sib.left, sr = sib.right;
1118		if ((sl == null || !sl.red) &&
1119		(sr == null || !sr.red)) {
1120		sib.red = true;
#	Line 1019 | Line 1126 | public class ConcurrentHashMapV8<K, V>
1126		sr.red = false;
1127		sib.red = true;
1128		rotateLeft(sib);
1129	<	sib = (xp = x.parent) == null ? null : xp.left;
1129	>	sib = (xp = x.parent) == null ?
1130	>	null : xp.left;
1131		}
1132		if (sib != null) {
1133		sib.red = (xp == null) ? false : xp.red;
#	Line 1049 | Line 1157 | public class ConcurrentHashMapV8<K, V>
1157		/* ---------------- Collision reduction methods -------------- */
1158
1159		/**
1160	<	* Spreads higher bits to lower, and also forces top 2 bits to 0.
1160	>	* Spreads higher bits to lower, and also forces top bit to 0.
1161		* Because the table uses power-of-two masking, sets of hashes
1162		* that vary only in bits above the current mask will always
1163		* collide. (Among known examples are sets of Float keys holding
#	Line 1067 | Line 1175 | public class ConcurrentHashMapV8<K, V>
1175		}
1176
1177		/**
1178	<	* Replaces a list bin with a tree bin. Call only when locked.
1179	<	* Fails to replace if the given key is non-comparable or table
1180	<	* is, or needs, resizing.
1181	<	*/
1182	<	private final void replaceWithTreeBin(Node[] tab, int index, Object key) {
1183	<	if ((key instanceof Comparable) &&
1184	<	(tab.length >= MAXIMUM_CAPACITY || counter.sum() < (long)sizeCtl)) {
1185	<	TreeBin t = new TreeBin();
1186	<	for (Node e = tabAt(tab, index); e != null; e = e.next)
1079	<	t.putTreeNode(e.hash & HASH_BITS, e.key, e.val);
1080	<	setTabAt(tab, index, new Node(MOVED, t, null, null));
1178	>	* Replaces a list bin with a tree bin if key is comparable.  Call
1179	>	* only when locked.
1180	>	*/
1181	>	private final void replaceWithTreeBin(Node<V>[] tab, int index, Object key) {
1182	>	if (key instanceof Comparable) {
1183	>	TreeBin<V> t = new TreeBin<V>();
1184	>	for (Node<V> e = tabAt(tab, index); e != null; e = e.next)
1185	>	t.putTreeNode(e.hash, e.key, e.val);
1186	>	setTabAt(tab, index, new Node<V>(MOVED, t, null, null));
1187		}
1188		}
1189
1190		/* ---------------- Internal access and update methods -------------- */
1191
1192		/** Implementation for get and containsKey */
1193	<	private final Object internalGet(Object k) {
1193	>	@SuppressWarnings("unchecked") private final V internalGet(Object k) {
1194		int h = spread(k.hashCode());
1195	<	retry: for (Node[] tab = table; tab != null;) {
1196	<	Node e, p; Object ek, ev; int eh;      // locals to read fields once
1195	>	retry: for (Node<V>[] tab = table; tab != null;) {
1196	>	Node<V> e; Object ek; V ev; int eh; // locals to read fields once
1197		for (e = tabAt(tab, (tab.length - 1) & h); e != null; e = e.next) {
1198	<	if ((eh = e.hash) == MOVED) {
1198	>	if ((eh = e.hash) < 0) {
1199		if ((ek = e.key) instanceof TreeBin)  // search TreeBin
1200	<	return ((TreeBin)ek).getValue(h, k);
1201	<	else {                        // restart with new table
1202	<	tab = (Node[])ek;
1200	>	return ((TreeBin<V>)ek).getValue(h, k);
1201	>	else {                      // restart with new table
1202	>	tab = (Node<V>[])ek;
1203		continue retry;
1204		}
1205		}
1206	<	else if ((eh & HASH_BITS) == h && (ev = e.val) != null &&
1206	>	else if (eh == h && (ev = e.val) != null &&
1207		((ek = e.key) == k || k.equals(ek)))
1208		return ev;
1209		}
#	Line 1111 | Line 1217 | public class ConcurrentHashMapV8<K, V>
1217		* Replaces node value with v, conditional upon match of cv if
1218		* non-null.  If resulting value is null, delete.
1219		*/
1220	<	private final Object internalReplace(Object k, Object v, Object cv) {
1220	>	@SuppressWarnings("unchecked") private final V internalReplace
1221	>	(Object k, V v, Object cv) {
1222		int h = spread(k.hashCode());
1223	<	Object oldVal = null;
1224	<	for (Node[] tab = table;;) {
1225	<	Node f; int i, fh; Object fk;
1223	>	V oldVal = null;
1224	>	for (Node<V>[] tab = table;;) {
1225	>	Node<V> f; int i, fh; Object fk;
1226		if (tab == null ||
1227		(f = tabAt(tab, i = (tab.length - 1) & h)) == null)
1228		break;
1229	<	else if ((fh = f.hash) == MOVED) {
1229	>	else if ((fh = f.hash) < 0) {
1230		if ((fk = f.key) instanceof TreeBin) {
1231	<	TreeBin t = (TreeBin)fk;
1231	>	TreeBin<V> t = (TreeBin<V>)fk;
1232		boolean validated = false;
1233		boolean deleted = false;
1234		t.acquire(0);
1235		try {
1236		if (tabAt(tab, i) == f) {
1237		validated = true;
1238	<	TreeNode p = t.getTreeNode(h, k, t.root);
1238	>	TreeNode<V> p = t.getTreeNode(h, k, t.root);
1239		if (p != null) {
1240	<	Object pv = p.val;
1240	>	V pv = p.val;
1241		if (cv == null || cv == pv || cv.equals(pv)) {
1242		oldVal = pv;
1243		if ((p.val = v) == null) {
#	Line 1145 | Line 1252 | public class ConcurrentHashMapV8<K, V>
1252		}
1253		if (validated) {
1254		if (deleted)
1255	<	counter.add(-1L);
1255	>	addCount(-1L, -1);
1256		break;
1257		}
1258		}
1259		else
1260	<	tab = (Node[])fk;
1260	>	tab = (Node<V>[])fk;
1261		}
1262	<	else if ((fh & HASH_BITS) != h && f.next == null) // precheck
1262	>	else if (fh != h && f.next == null) // precheck
1263		break;                          // rules out possible existence
1264	<	else if ((fh & LOCKED) != 0) {
1158	<	checkForResize();               // try resizing if can't get lock
1159	<	f.tryAwaitLock(tab, i);
1160	<	}
1161	<	else if (f.casHash(fh, fh | LOCKED)) {
1264	>	else {
1265		boolean validated = false;
1266		boolean deleted = false;
1267	<	try {
1267	>	synchronized (f) {
1268		if (tabAt(tab, i) == f) {
1269		validated = true;
1270	<	for (Node e = f, pred = null;;) {
1271	<	Object ek, ev;
1272	<	if ((e.hash & HASH_BITS) == h &&
1270	>	for (Node<V> e = f, pred = null;;) {
1271	>	Object ek; V ev;
1272	>	if (e.hash == h &&
1273		((ev = e.val) != null) &&
1274		((ek = e.key) == k || k.equals(ek))) {
1275		if (cv == null || cv == ev || cv.equals(ev)) {
1276		oldVal = ev;
1277		if ((e.val = v) == null) {
1278		deleted = true;
1279	<	Node en = e.next;
1279	>	Node<V> en = e.next;
1280		if (pred != null)
1281		pred.next = en;
1282		else
#	Line 1187 | Line 1290 | public class ConcurrentHashMapV8<K, V>
1290		break;
1291		}
1292		}
1190	–	} finally {
1191	–	if (!f.casHash(fh | LOCKED, fh)) {
1192	–	f.hash = fh;
1193	–	synchronized (f) { f.notifyAll(); };
1194	–	}
1293		}
1294		if (validated) {
1295		if (deleted)
1296	<	counter.add(-1L);
1296	>	addCount(-1L, -1);
1297		break;
1298		}
1299		}
#	Line 1204 | Line 1302 | public class ConcurrentHashMapV8<K, V>
1302		}
1303
1304		/*
1305	<	* Internal versions of the five insertion methods, each a
1306	<	* little more complicated than the last. All have
1209	<	* the same basic structure as the first (internalPut):
1305	>	* Internal versions of insertion methods
1306	>	* All have the same basic structure as the first (internalPut):
1307		*  1. If table uninitialized, create
1308		*  2. If bin empty, try to CAS new node
1309		*  3. If bin stale, use new table
1310		*  4. if bin converted to TreeBin, validate and relay to TreeBin methods
1311		*  5. Lock and validate; if valid, scan and add or update
1312		*
1313	<	* The others interweave other checks and/or alternative actions:
1314	<	*  * Plain put checks for and performs resize after insertion.
1315	<	*  * putIfAbsent prescans for mapping without lock (and fails to add
1316	<	*    if present), which also makes pre-emptive resize checks worthwhile.
1317	<	*  * computeIfAbsent extends form used in putIfAbsent with additional
1318	<	*    mechanics to deal with, calls, potential exceptions and null
1319	<	*    returns from function call.
1223	<	*  * compute uses the same function-call mechanics, but without
1224	<	*    the prescans
1225	<	*  * putAll attempts to pre-allocate enough table space
1226	<	*    and more lazily performs count updates and checks.
1227	<	*
1228	<	* Someday when details settle down a bit more, it might be worth
1229	<	* some factoring to reduce sprawl.
1313	>	* The putAll method differs mainly in attempting to pre-allocate
1314	>	* enough table space, and also more lazily performs count updates
1315	>	* and checks.
1316	>	*
1317	>	* Most of the function-accepting methods can't be factored nicely
1318	>	* because they require different functional forms, so instead
1319	>	* sprawl out similar mechanics.
1320		*/
1321
1322	<	/** Implementation for put */
1323	<	private final Object internalPut(Object k, Object v) {
1322	>	/** Implementation for put and putIfAbsent */
1323	>	@SuppressWarnings("unchecked") private final V internalPut
1324	>	(K k, V v, boolean onlyIfAbsent) {
1325	>	if (k == null || v == null) throw new NullPointerException();
1326		int h = spread(k.hashCode());
1327	<	int count = 0;
1328	<	for (Node[] tab = table;;) {
1329	<	int i; Node f; int fh; Object fk;
1327	>	int len = 0;
1328	>	for (Node<V>[] tab = table;;) {
1329	>	int i, fh; Node<V> f; Object fk; V fv;
1330		if (tab == null)
1331		tab = initTable();
1332		else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) {
1333	<	if (casTabAt(tab, i, null, new Node(h, k, v, null)))
1333	>	if (casTabAt(tab, i, null, new Node<V>(h, k, v, null)))
1334		break;                   // no lock when adding to empty bin
1335		}
1336	<	else if ((fh = f.hash) == MOVED) {
1336	>	else if ((fh = f.hash) < 0) {
1337		if ((fk = f.key) instanceof TreeBin) {
1338	<	TreeBin t = (TreeBin)fk;
1339	<	Object oldVal = null;
1338	>	TreeBin<V> t = (TreeBin<V>)fk;
1339	>	V oldVal = null;
1340		t.acquire(0);
1341		try {
1342		if (tabAt(tab, i) == f) {
1343	<	count = 2;
1344	<	TreeNode p = t.putTreeNode(h, k, v);
1343	>	len = 2;
1344	>	TreeNode<V> p = t.putTreeNode(h, k, v);
1345		if (p != null) {
1346		oldVal = p.val;
1347	<	p.val = v;
1347	>	if (!onlyIfAbsent)
1348	>	p.val = v;
1349		}
1350		}
1351		} finally {
1352		t.release(0);
1353		}
1354	<	if (count != 0) {
1354	>	if (len != 0) {
1355		if (oldVal != null)
1356		return oldVal;
1357		break;
1358		}
1359		}
1360		else
1361	<	tab = (Node[])fk;
1361	>	tab = (Node<V>[])fk;
1362		}
1363	<	else if ((fh & LOCKED) != 0) {
1364	<	checkForResize();
1365	<	f.tryAwaitLock(tab, i);
1366	<	}
1367	<	else if (f.casHash(fh, fh | LOCKED)) {
1368	<	Object oldVal = null;
1276	<	try {                        // needed in case equals() throws
1363	>	else if (onlyIfAbsent && fh == h && (fv = f.val) != null &&
1364	>	((fk = f.key) == k || k.equals(fk))) // peek while nearby
1365	>	return fv;
1366	>	else {
1367	>	V oldVal = null;
1368	>	synchronized (f) {
1369		if (tabAt(tab, i) == f) {
1370	<	count = 1;
1371	<	for (Node e = f;; ++count) {
1372	<	Object ek, ev;
1373	<	if ((e.hash & HASH_BITS) == h &&
1370	>	len = 1;
1371	>	for (Node<V> e = f;; ++len) {
1372	>	Object ek; V ev;
1373	>	if (e.hash == h &&
1374		(ev = e.val) != null &&
1375		((ek = e.key) == k || k.equals(ek))) {
1376		oldVal = ev;
1377	<	e.val = v;
1377	>	if (!onlyIfAbsent)
1378	>	e.val = v;
1379		break;
1380		}
1381	<	Node last = e;
1381	>	Node<V> last = e;
1382		if ((e = e.next) == null) {
1383	<	last.next = new Node(h, k, v, null);
1384	<	if (count >= TREE_THRESHOLD)
1383	>	last.next = new Node<V>(h, k, v, null);
1384	>	if (len >= TREE_THRESHOLD)
1385		replaceWithTreeBin(tab, i, k);
1386		break;
1387		}
1388		}
1389		}
1297	–	} finally {                  // unlock and signal if needed
1298	–	if (!f.casHash(fh | LOCKED, fh)) {
1299	–	f.hash = fh;
1300	–	synchronized (f) { f.notifyAll(); };
1301	–	}
1390		}
1391	<	if (count != 0) {
1391	>	if (len != 0) {
1392		if (oldVal != null)
1393		return oldVal;
1306	–	if (tab.length <= 64)
1307	–	count = 2;
1308	–	break;
1309	–	}
1310	–	}
1311	–	}
1312	–	counter.add(1L);
1313	–	if (count > 1)
1314	–	checkForResize();
1315	–	return null;
1316	–	}
1317	–
1318	–	/** Implementation for putIfAbsent */
1319	–	private final Object internalPutIfAbsent(Object k, Object v) {
1320	–	int h = spread(k.hashCode());
1321	–	int count = 0;
1322	–	for (Node[] tab = table;;) {
1323	–	int i; Node f; int fh; Object fk, fv;
1324	–	if (tab == null)
1325	–	tab = initTable();
1326	–	else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) {
1327	–	if (casTabAt(tab, i, null, new Node(h, k, v, null)))
1394		break;
1329	–	}
1330	–	else if ((fh = f.hash) == MOVED) {
1331	–	if ((fk = f.key) instanceof TreeBin) {
1332	–	TreeBin t = (TreeBin)fk;
1333	–	Object oldVal = null;
1334	–	t.acquire(0);
1335	–	try {
1336	–	if (tabAt(tab, i) == f) {
1337	–	count = 2;
1338	–	TreeNode p = t.putTreeNode(h, k, v);
1339	–	if (p != null)
1340	–	oldVal = p.val;
1341	–	}
1342	–	} finally {
1343	–	t.release(0);
1344	–	}
1345	–	if (count != 0) {
1346	–	if (oldVal != null)
1347	–	return oldVal;
1348	–	break;
1349	–	}
1350	–	}
1351	–	else
1352	–	tab = (Node[])fk;
1353	–	}
1354	–	else if ((fh & HASH_BITS) == h && (fv = f.val) != null &&
1355	–	((fk = f.key) == k || k.equals(fk)))
1356	–	return fv;
1357	–	else {
1358	–	Node g = f.next;
1359	–	if (g != null) { // at least 2 nodes -- search and maybe resize
1360	–	for (Node e = g;;) {
1361	–	Object ek, ev;
1362	–	if ((e.hash & HASH_BITS) == h && (ev = e.val) != null &&
1363	–	((ek = e.key) == k || k.equals(ek)))
1364	–	return ev;
1365	–	if ((e = e.next) == null) {
1366	–	checkForResize();
1367	–	break;
1368	–	}
1369	–	}
1370	–	}
1371	–	if (((fh = f.hash) & LOCKED) != 0) {
1372	–	checkForResize();
1373	–	f.tryAwaitLock(tab, i);
1374	–	}
1375	–	else if (tabAt(tab, i) == f && f.casHash(fh, fh | LOCKED)) {
1376	–	Object oldVal = null;
1377	–	try {
1378	–	if (tabAt(tab, i) == f) {
1379	–	count = 1;
1380	–	for (Node e = f;; ++count) {
1381	–	Object ek, ev;
1382	–	if ((e.hash & HASH_BITS) == h &&
1383	–	(ev = e.val) != null &&
1384	–	((ek = e.key) == k || k.equals(ek))) {
1385	–	oldVal = ev;
1386	–	break;
1387	–	}
1388	–	Node last = e;
1389	–	if ((e = e.next) == null) {
1390	–	last.next = new Node(h, k, v, null);
1391	–	if (count >= TREE_THRESHOLD)
1392	–	replaceWithTreeBin(tab, i, k);
1393	–	break;
1394	–	}
1395	–	}
1396	–	}
1397	–	} finally {
1398	–	if (!f.casHash(fh | LOCKED, fh)) {
1399	–	f.hash = fh;
1400	–	synchronized (f) { f.notifyAll(); };
1401	–	}
1402	–	}
1403	–	if (count != 0) {
1404	–	if (oldVal != null)
1405	–	return oldVal;
1406	–	if (tab.length <= 64)
1407	–	count = 2;
1408	–	break;
1409	–	}
1395		}
1396		}
1397		}
1398	<	counter.add(1L);
1414	<	if (count > 1)
1415	<	checkForResize();
1398	>	addCount(1L, len);
1399		return null;
1400		}
1401
1402		/** Implementation for computeIfAbsent */
1403	<	private final Object internalComputeIfAbsent(K k,
1404	<	Fun<? super K, ?> mf) {
1403	>	@SuppressWarnings("unchecked") private final V internalComputeIfAbsent
1404	>	(K k, Fun<? super K, ? extends V> mf) {
1405	>	if (k == null || mf == null)
1406	>	throw new NullPointerException();
1407		int h = spread(k.hashCode());
1408	<	Object val = null;
1409	<	int count = 0;
1410	<	for (Node[] tab = table;;) {
1411	<	Node f; int i, fh; Object fk, fv;
1408	>	V val = null;
1409	>	int len = 0;
1410	>	for (Node<V>[] tab = table;;) {
1411	>	Node<V> f; int i; Object fk;
1412		if (tab == null)
1413		tab = initTable();
1414		else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) {
1415	<	Node node = new Node(fh = h | LOCKED, k, null, null);
1416	<	if (casTabAt(tab, i, null, node)) {
1417	<	count = 1;
1418	<	try {
1419	<	if ((val = mf.apply(k)) != null)
1420	<	node.val = val;
1421	<	} finally {
1422	<	if (val == null)
1423	<	setTabAt(tab, i, null);
1424	<	if (!node.casHash(fh, h)) {
1440	<	node.hash = h;
1441	<	synchronized (node) { node.notifyAll(); };
1415	>	Node<V> node = new Node<V>(h, k, null, null);
1416	>	synchronized (node) {
1417	>	if (casTabAt(tab, i, null, node)) {
1418	>	len = 1;
1419	>	try {
1420	>	if ((val = mf.apply(k)) != null)
1421	>	node.val = val;
1422	>	} finally {
1423	>	if (val == null)
1424	>	setTabAt(tab, i, null);
1425		}
1426		}
1427		}
1428	<	if (count != 0)
1428	>	if (len != 0)
1429		break;
1430		}
1431	<	else if ((fh = f.hash) == MOVED) {
1431	>	else if (f.hash < 0) {
1432		if ((fk = f.key) instanceof TreeBin) {
1433	<	TreeBin t = (TreeBin)fk;
1433	>	TreeBin<V> t = (TreeBin<V>)fk;
1434		boolean added = false;
1435		t.acquire(0);
1436		try {
1437		if (tabAt(tab, i) == f) {
1438	<	count = 1;
1439	<	TreeNode p = t.getTreeNode(h, k, t.root);
1438	>	len = 1;
1439	>	TreeNode<V> p = t.getTreeNode(h, k, t.root);
1440		if (p != null)
1441		val = p.val;
1442		else if ((val = mf.apply(k)) != null) {
1443		added = true;
1444	<	count = 2;
1444	>	len = 2;
1445		t.putTreeNode(h, k, val);
1446		}
1447		}
1448		} finally {
1449		t.release(0);
1450		}
1451	<	if (count != 0) {
1451	>	if (len != 0) {
1452		if (!added)
1453		return val;
1454		break;
1455		}
1456		}
1457		else
1458	<	tab = (Node[])fk;
1458	>	tab = (Node<V>[])fk;
1459		}
1477	–	else if ((fh & HASH_BITS) == h && (fv = f.val) != null &&
1478	–	((fk = f.key) == k || k.equals(fk)))
1479	–	return fv;
1460		else {
1461	<	Node g = f.next;
1462	<	if (g != null) {
1463	<	for (Node e = g;;) {
1464	<	Object ek, ev;
1465	<	if ((e.hash & HASH_BITS) == h && (ev = e.val) != null &&
1486	<	((ek = e.key) == k || k.equals(ek)))
1487	<	return ev;
1488	<	if ((e = e.next) == null) {
1489	<	checkForResize();
1490	<	break;
1491	<	}
1492	<	}
1493	<	}
1494	<	if (((fh = f.hash) & LOCKED) != 0) {
1495	<	checkForResize();
1496	<	f.tryAwaitLock(tab, i);
1461	>	for (Node<V> e = f; e != null; e = e.next) { // prescan
1462	>	Object ek; V ev;
1463	>	if (e.hash == h && (ev = e.val) != null &&
1464	>	((ek = e.key) == k || k.equals(ek)))
1465	>	return ev;
1466		}
1467	<	else if (tabAt(tab, i) == f && f.casHash(fh, fh | LOCKED)) {
1468	<	boolean added = false;
1469	<	try {
1470	<	if (tabAt(tab, i) == f) {
1471	<	count = 1;
1472	<	for (Node e = f;; ++count) {
1473	<	Object ek, ev;
1474	<	if ((e.hash & HASH_BITS) == h &&
1475	<	(ev = e.val) != null &&
1476	<	((ek = e.key) == k || k.equals(ek))) {
1477	<	val = ev;
1478	<	break;
1479	<	}
1480	<	Node last = e;
1481	<	if ((e = e.next) == null) {
1482	<	if ((val = mf.apply(k)) != null) {
1483	<	added = true;
1484	<	last.next = new Node(h, k, val, null);
1485	<	if (count >= TREE_THRESHOLD)
1517	<	replaceWithTreeBin(tab, i, k);
1518	<	}
1519	<	break;
1467	>	boolean added = false;
1468	>	synchronized (f) {
1469	>	if (tabAt(tab, i) == f) {
1470	>	len = 1;
1471	>	for (Node<V> e = f;; ++len) {
1472	>	Object ek; V ev;
1473	>	if (e.hash == h &&
1474	>	(ev = e.val) != null &&
1475	>	((ek = e.key) == k || k.equals(ek))) {
1476	>	val = ev;
1477	>	break;
1478	>	}
1479	>	Node<V> last = e;
1480	>	if ((e = e.next) == null) {
1481	>	if ((val = mf.apply(k)) != null) {
1482	>	added = true;
1483	>	last.next = new Node<V>(h, k, val, null);
1484	>	if (len >= TREE_THRESHOLD)
1485	>	replaceWithTreeBin(tab, i, k);
1486		}
1487	+	break;
1488		}
1489		}
1523	–	} finally {
1524	–	if (!f.casHash(fh | LOCKED, fh)) {
1525	–	f.hash = fh;
1526	–	synchronized (f) { f.notifyAll(); };
1527	–	}
1528	–	}
1529	–	if (count != 0) {
1530	–	if (!added)
1531	–	return val;
1532	–	if (tab.length <= 64)
1533	–	count = 2;
1534	–	break;
1490		}
1491		}
1492	+	if (len != 0) {
1493	+	if (!added)
1494	+	return val;
1495	+	break;
1496	+	}
1497		}
1498		}
1499	<	if (val != null) {
1500	<	counter.add(1L);
1541	<	if (count > 1)
1542	<	checkForResize();
1543	<	}
1499	>	if (val != null)
1500	>	addCount(1L, len);
1501		return val;
1502		}
1503
1504		/** Implementation for compute */
1505	<	@SuppressWarnings("unchecked")
1506	<	private final Object internalCompute(K k, boolean onlyIfPresent,
1507	<	BiFun<? super K, ? super V, ? extends V> mf) {
1505	>	@SuppressWarnings("unchecked") private final V internalCompute
1506	>	(K k, boolean onlyIfPresent,
1507	>	BiFun<? super K, ? super V, ? extends V> mf) {
1508	>	if (k == null || mf == null)
1509	>	throw new NullPointerException();
1510		int h = spread(k.hashCode());
1511	<	Object val = null;
1511	>	V val = null;
1512		int delta = 0;
1513	<	int count = 0;
1514	<	for (Node[] tab = table;;) {
1515	<	Node f; int i, fh; Object fk;
1513	>	int len = 0;
1514	>	for (Node<V>[] tab = table;;) {
1515	>	Node<V> f; int i, fh; Object fk;
1516		if (tab == null)
1517		tab = initTable();
1518		else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) {
1519		if (onlyIfPresent)
1520		break;
1521	<	Node node = new Node(fh = h | LOCKED, k, null, null);
1522	<	if (casTabAt(tab, i, null, node)) {
1523	<	try {
1524	<	count = 1;
1525	<	if ((val = mf.apply(k, null)) != null) {
1526	<	node.val = val;
1527	<	delta = 1;
1528	<	}
1529	<	} finally {
1530	<	if (delta == 0)
1531	<	setTabAt(tab, i, null);
1532	<	if (!node.casHash(fh, h)) {
1574	<	node.hash = h;
1575	<	synchronized (node) { node.notifyAll(); };
1521	>	Node<V> node = new Node<V>(h, k, null, null);
1522	>	synchronized (node) {
1523	>	if (casTabAt(tab, i, null, node)) {
1524	>	try {
1525	>	len = 1;
1526	>	if ((val = mf.apply(k, null)) != null) {
1527	>	node.val = val;
1528	>	delta = 1;
1529	>	}
1530	>	} finally {
1531	>	if (delta == 0)
1532	>	setTabAt(tab, i, null);
1533		}
1534		}
1535		}
1536	<	if (count != 0)
1536	>	if (len != 0)
1537		break;
1538		}
1539	<	else if ((fh = f.hash) == MOVED) {
1539	>	else if ((fh = f.hash) < 0) {
1540		if ((fk = f.key) instanceof TreeBin) {
1541	<	TreeBin t = (TreeBin)fk;
1541	>	TreeBin<V> t = (TreeBin<V>)fk;
1542		t.acquire(0);
1543		try {
1544		if (tabAt(tab, i) == f) {
1545	<	count = 1;
1546	<	TreeNode p = t.getTreeNode(h, k, t.root);
1547	<	Object pv = (p == null) ? null : p.val;
1548	<	if ((val = mf.apply(k, (V)pv)) != null) {
1545	>	len = 1;
1546	>	TreeNode<V> p = t.getTreeNode(h, k, t.root);
1547	>	if (p == null && onlyIfPresent)
1548	>	break;
1549	>	V pv = (p == null) ? null : p.val;
1550	>	if ((val = mf.apply(k, pv)) != null) {
1551		if (p != null)
1552		p.val = val;
1553		else {
1554	<	count = 2;
1554	>	len = 2;
1555		delta = 1;
1556		t.putTreeNode(h, k, val);
1557		}
#	Line 1605 | Line 1564 | public class ConcurrentHashMapV8<K, V>
1564		} finally {
1565		t.release(0);
1566		}
1567	<	if (count != 0)
1567	>	if (len != 0)
1568		break;
1569		}
1570		else
1571	<	tab = (Node[])fk;
1571	>	tab = (Node<V>[])fk;
1572		}
1573	<	else if ((fh & LOCKED) != 0) {
1574	<	checkForResize();
1616	<	f.tryAwaitLock(tab, i);
1617	<	}
1618	<	else if (f.casHash(fh, fh | LOCKED)) {
1619	<	try {
1573	>	else {
1574	>	synchronized (f) {
1575		if (tabAt(tab, i) == f) {
1576	<	count = 1;
1577	<	for (Node e = f, pred = null;; ++count) {
1578	<	Object ek, ev;
1579	<	if ((e.hash & HASH_BITS) == h &&
1576	>	len = 1;
1577	>	for (Node<V> e = f, pred = null;; ++len) {
1578	>	Object ek; V ev;
1579	>	if (e.hash == h &&
1580		(ev = e.val) != null &&
1581		((ek = e.key) == k || k.equals(ek))) {
1582	<	val = mf.apply(k, (V)ev);
1582	>	val = mf.apply(k, ev);
1583		if (val != null)
1584		e.val = val;
1585		else {
1586		delta = -1;
1587	<	Node en = e.next;
1587	>	Node<V> en = e.next;
1588		if (pred != null)
1589		pred.next = en;
1590		else
#	Line 1639 | Line 1594 | public class ConcurrentHashMapV8<K, V>
1594		}
1595		pred = e;
1596		if ((e = e.next) == null) {
1597	<	if (!onlyIfPresent && (val = mf.apply(k, null)) != null) {
1598	<	pred.next = new Node(h, k, val, null);
1597	>	if (!onlyIfPresent &&
1598	>	(val = mf.apply(k, null)) != null) {
1599	>	pred.next = new Node<V>(h, k, val, null);
1600		delta = 1;
1601	<	if (count >= TREE_THRESHOLD)
1601	>	if (len >= TREE_THRESHOLD)
1602		replaceWithTreeBin(tab, i, k);
1603		}
1604		break;
1605		}
1606		}
1607		}
1652	–	} finally {
1653	–	if (!f.casHash(fh | LOCKED, fh)) {
1654	–	f.hash = fh;
1655	–	synchronized (f) { f.notifyAll(); };
1656	–	}
1608		}
1609	<	if (count != 0) {
1659	<	if (tab.length <= 64)
1660	<	count = 2;
1609	>	if (len != 0)
1610		break;
1662	–	}
1611		}
1612		}
1613	<	if (delta != 0) {
1614	<	counter.add((long)delta);
1667	<	if (count > 1)
1668	<	checkForResize();
1669	<	}
1613	>	if (delta != 0)
1614	>	addCount((long)delta, len);
1615		return val;
1616		}
1617
1618	<	private final Object internalMerge(K k, V v,
1619	<	BiFun<? super V, ? super V, ? extends V> mf) {
1618	>	/** Implementation for merge */
1619	>	@SuppressWarnings("unchecked") private final V internalMerge
1620	>	(K k, V v, BiFun<? super V, ? super V, ? extends V> mf) {
1621	>	if (k == null || v == null || mf == null)
1622	>	throw new NullPointerException();
1623		int h = spread(k.hashCode());
1624	<	Object val = null;
1624	>	V val = null;
1625		int delta = 0;
1626	<	int count = 0;
1627	<	for (Node[] tab = table;;) {
1628	<	int i; Node f; int fh; Object fk, fv;
1626	>	int len = 0;
1627	>	for (Node<V>[] tab = table;;) {
1628	>	int i; Node<V> f; Object fk; V fv;
1629		if (tab == null)
1630		tab = initTable();
1631		else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) {
1632	<	if (casTabAt(tab, i, null, new Node(h, k, v, null))) {
1632	>	if (casTabAt(tab, i, null, new Node<V>(h, k, v, null))) {
1633		delta = 1;
1634		val = v;
1635		break;
1636		}
1637		}
1638	<	else if ((fh = f.hash) == MOVED) {
1638	>	else if (f.hash < 0) {
1639		if ((fk = f.key) instanceof TreeBin) {
1640	<	TreeBin t = (TreeBin)fk;
1640	>	TreeBin<V> t = (TreeBin<V>)fk;
1641		t.acquire(0);
1642		try {
1643		if (tabAt(tab, i) == f) {
1644	<	count = 1;
1645	<	TreeNode p = t.getTreeNode(h, k, t.root);
1646	<	val = (p == null) ? v : mf.apply((V)p.val, v);
1644	>	len = 1;
1645	>	TreeNode<V> p = t.getTreeNode(h, k, t.root);
1646	>	val = (p == null) ? v : mf.apply(p.val, v);
1647		if (val != null) {
1648		if (p != null)
1649		p.val = val;
1650		else {
1651	<	count = 2;
1651	>	len = 2;
1652		delta = 1;
1653		t.putTreeNode(h, k, val);
1654		}
#	Line 1713 | Line 1661 | public class ConcurrentHashMapV8<K, V>
1661		} finally {
1662		t.release(0);
1663		}
1664	<	if (count != 0)
1664	>	if (len != 0)
1665		break;
1666		}
1667		else
1668	<	tab = (Node[])fk;
1721	<	}
1722	<	else if ((fh & LOCKED) != 0) {
1723	<	checkForResize();
1724	<	f.tryAwaitLock(tab, i);
1668	>	tab = (Node<V>[])fk;
1669		}
1670	<	else if (f.casHash(fh, fh | LOCKED)) {
1671	<	try {
1670	>	else {
1671	>	synchronized (f) {
1672		if (tabAt(tab, i) == f) {
1673	<	count = 1;
1674	<	for (Node e = f, pred = null;; ++count) {
1675	<	Object ek, ev;
1676	<	if ((e.hash & HASH_BITS) == h &&
1673	>	len = 1;
1674	>	for (Node<V> e = f, pred = null;; ++len) {
1675	>	Object ek; V ev;
1676	>	if (e.hash == h &&
1677		(ev = e.val) != null &&
1678		((ek = e.key) == k || k.equals(ek))) {
1679	<	val = mf.apply(v, (V)ev);
1679	>	val = mf.apply(ev, v);
1680		if (val != null)
1681		e.val = val;
1682		else {
1683		delta = -1;
1684	<	Node en = e.next;
1684	>	Node<V> en = e.next;
1685		if (pred != null)
1686		pred.next = en;
1687		else
#	Line 1748 | Line 1692 | public class ConcurrentHashMapV8<K, V>
1692		pred = e;
1693		if ((e = e.next) == null) {
1694		val = v;
1695	<	pred.next = new Node(h, k, val, null);
1695	>	pred.next = new Node<V>(h, k, val, null);
1696		delta = 1;
1697	<	if (count >= TREE_THRESHOLD)
1697	>	if (len >= TREE_THRESHOLD)
1698		replaceWithTreeBin(tab, i, k);
1699		break;
1700		}
1701		}
1702		}
1759	–	} finally {
1760	–	if (!f.casHash(fh | LOCKED, fh)) {
1761	–	f.hash = fh;
1762	–	synchronized (f) { f.notifyAll(); };
1763	–	}
1703		}
1704	<	if (count != 0) {
1766	<	if (tab.length <= 64)
1767	<	count = 2;
1704	>	if (len != 0)
1705		break;
1769	–	}
1706		}
1707		}
1708	<	if (delta != 0) {
1709	<	counter.add((long)delta);
1774	<	if (count > 1)
1775	<	checkForResize();
1776	<	}
1708	>	if (delta != 0)
1709	>	addCount((long)delta, len);
1710		return val;
1711		}
1712
1713		/** Implementation for putAll */
1714	<	private final void internalPutAll(Map<?, ?> m) {
1714	>	@SuppressWarnings("unchecked") private final void internalPutAll
1715	>	(Map<? extends K, ? extends V> m) {
1716		tryPresize(m.size());
1717		long delta = 0L;     // number of uncommitted additions
1718		boolean npe = false; // to throw exception on exit for nulls
1719		try {                // to clean up counts on other exceptions
1720	<	for (Map.Entry<?, ?> entry : m.entrySet()) {
1721	<	Object k, v;
1720	>	for (Map.Entry<?, ? extends V> entry : m.entrySet()) {
1721	>	Object k; V v;
1722		if (entry == null || (k = entry.getKey()) == null ||
1723		(v = entry.getValue()) == null) {
1724		npe = true;
1725		break;
1726		}
1727		int h = spread(k.hashCode());
1728	<	for (Node[] tab = table;;) {
1729	<	int i; Node f; int fh; Object fk;
1728	>	for (Node<V>[] tab = table;;) {
1729	>	int i; Node<V> f; int fh; Object fk;
1730		if (tab == null)
1731		tab = initTable();
1732		else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null){
1733	<	if (casTabAt(tab, i, null, new Node(h, k, v, null))) {
1733	>	if (casTabAt(tab, i, null, new Node<V>(h, k, v, null))) {
1734		++delta;
1735		break;
1736		}
1737		}
1738	<	else if ((fh = f.hash) == MOVED) {
1738	>	else if ((fh = f.hash) < 0) {
1739		if ((fk = f.key) instanceof TreeBin) {
1740	<	TreeBin t = (TreeBin)fk;
1740	>	TreeBin<V> t = (TreeBin<V>)fk;
1741		boolean validated = false;
1742		t.acquire(0);
1743		try {
1744		if (tabAt(tab, i) == f) {
1745		validated = true;
1746	<	TreeNode p = t.getTreeNode(h, k, t.root);
1746	>	TreeNode<V> p = t.getTreeNode(h, k, t.root);
1747		if (p != null)
1748		p.val = v;
1749		else {
#	Line 1824 | Line 1758 | public class ConcurrentHashMapV8<K, V>
1758		break;
1759		}
1760		else
1761	<	tab = (Node[])fk;
1761	>	tab = (Node<V>[])fk;
1762		}
1763	<	else if ((fh & LOCKED) != 0) {
1764	<	counter.add(delta);
1765	<	delta = 0L;
1832	<	checkForResize();
1833	<	f.tryAwaitLock(tab, i);
1834	<	}
1835	<	else if (f.casHash(fh, fh | LOCKED)) {
1836	<	int count = 0;
1837	<	try {
1763	>	else {
1764	>	int len = 0;
1765	>	synchronized (f) {
1766		if (tabAt(tab, i) == f) {
1767	<	count = 1;
1768	<	for (Node e = f;; ++count) {
1769	<	Object ek, ev;
1770	<	if ((e.hash & HASH_BITS) == h &&
1767	>	len = 1;
1768	>	for (Node<V> e = f;; ++len) {
1769	>	Object ek; V ev;
1770	>	if (e.hash == h &&
1771		(ev = e.val) != null &&
1772		((ek = e.key) == k || k.equals(ek))) {
1773		e.val = v;
1774		break;
1775		}
1776	<	Node last = e;
1776	>	Node<V> last = e;
1777		if ((e = e.next) == null) {
1778		++delta;
1779	<	last.next = new Node(h, k, v, null);
1780	<	if (count >= TREE_THRESHOLD)
1779	>	last.next = new Node<V>(h, k, v, null);
1780	>	if (len >= TREE_THRESHOLD)
1781		replaceWithTreeBin(tab, i, k);
1782		break;
1783		}
1784		}
1785		}
1858	–	} finally {
1859	–	if (!f.casHash(fh | LOCKED, fh)) {
1860	–	f.hash = fh;
1861	–	synchronized (f) { f.notifyAll(); };
1862	–	}
1786		}
1787	<	if (count != 0) {
1788	<	if (count > 1) {
1789	<	counter.add(delta);
1787	>	if (len != 0) {
1788	>	if (len > 1) {
1789	>	addCount(delta, len);
1790		delta = 0L;
1868	–	checkForResize();
1791		}
1792		break;
1793		}
#	Line 1873 | Line 1795 | public class ConcurrentHashMapV8<K, V>
1795		}
1796		}
1797		} finally {
1798	<	if (delta != 0)
1799	<	counter.add(delta);
1798	>	if (delta != 0L)
1799	>	addCount(delta, 2);
1800		}
1801		if (npe)
1802		throw new NullPointerException();
1803		}
1804
1805	+	/**
1806	+	* Implementation for clear. Steps through each bin, removing all
1807	+	* nodes.
1808	+	*/
1809	+	@SuppressWarnings("unchecked") private final void internalClear() {
1810	+	long delta = 0L; // negative number of deletions
1811	+	int i = 0;
1812	+	Node<V>[] tab = table;
1813	+	while (tab != null && i < tab.length) {
1814	+	Node<V> f = tabAt(tab, i);
1815	+	if (f == null)
1816	+	++i;
1817	+	else if (f.hash < 0) {
1818	+	Object fk;
1819	+	if ((fk = f.key) instanceof TreeBin) {
1820	+	TreeBin<V> t = (TreeBin<V>)fk;
1821	+	t.acquire(0);
1822	+	try {
1823	+	if (tabAt(tab, i) == f) {
1824	+	for (Node<V> p = t.first; p != null; p = p.next) {
1825	+	if (p.val != null) { // (currently always true)
1826	+	p.val = null;
1827	+	--delta;
1828	+	}
1829	+	}
1830	+	t.first = null;
1831	+	t.root = null;
1832	+	++i;
1833	+	}
1834	+	} finally {
1835	+	t.release(0);
1836	+	}
1837	+	}
1838	+	else
1839	+	tab = (Node<V>[])fk;
1840	+	}
1841	+	else {
1842	+	synchronized (f) {
1843	+	if (tabAt(tab, i) == f) {
1844	+	for (Node<V> e = f; e != null; e = e.next) {
1845	+	if (e.val != null) {  // (currently always true)
1846	+	e.val = null;
1847	+	--delta;
1848	+	}
1849	+	}
1850	+	setTabAt(tab, i, null);
1851	+	++i;
1852	+	}
1853	+	}
1854	+	}
1855	+	}
1856	+	if (delta != 0L)
1857	+	addCount(delta, -1);
1858	+	}
1859	+
1860		/* ---------------- Table Initialization and Resizing -------------- */
1861
1862		/**
#	Line 1899 | Line 1876 | public class ConcurrentHashMapV8<K, V>
1876		/**
1877		* Initializes table, using the size recorded in sizeCtl.
1878		*/
1879	<	private final Node[] initTable() {
1880	<	Node[] tab; int sc;
1879	>	@SuppressWarnings("unchecked") private final Node<V>[] initTable() {
1880	>	Node<V>[] tab; int sc;
1881		while ((tab = table) == null) {
1882		if ((sc = sizeCtl) < 0)
1883		Thread.yield(); // lost initialization race; just spin
1884	<	else if (UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) {
1884	>	else if (U.compareAndSwapInt(this, SIZECTL, sc, -1)) {
1885		try {
1886		if ((tab = table) == null) {
1887		int n = (sc > 0) ? sc : DEFAULT_CAPACITY;
1888	<	tab = table = new Node[n];
1888	>	@SuppressWarnings("rawtypes") Node[] tb = new Node[n];
1889	>	table = tab = (Node<V>[])tb;
1890		sc = n - (n >>> 2);
1891		}
1892		} finally {
#	Line 1921 | Line 1899 | public class ConcurrentHashMapV8<K, V>
1899		}
1900
1901		/**
1902	<	* If table is too small and not already resizing, creates next
1903	<	* table and transfers bins.  Rechecks occupancy after a transfer
1904	<	* to see if another resize is already needed because resizings
1905	<	* are lagging additions.
1906	<	*/
1907	<	private final void checkForResize() {
1908	<	Node[] tab; int n, sc;
1909	<	while ((tab = table) != null &&
1910	<	(n = tab.length) < MAXIMUM_CAPACITY &&
1911	<	(sc = sizeCtl) >= 0 && counter.sum() >= (long)sc &&
1912	<	UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) {
1913	<	try {
1914	<	if (tab == table) {
1915	<	table = rebuild(tab);
1916	<	sc = (n << 1) - (n >>> 1);
1902	>	* Adds to count, and if table is too small and not already
1903	>	* resizing, initiates transfer. If already resizing, helps
1904	>	* perform transfer if work is available.  Rechecks occupancy
1905	>	* after a transfer to see if another resize is already needed
1906	>	* because resizings are lagging additions.
1907	>	*
1908	>	* @param x the count to add
1909	>	* @param check if <0, don't check resize, if <= 1 only check if uncontended
1910	>	*/
1911	>	private final void addCount(long x, int check) {
1912	>	CounterCell[] as; long b, s;
1913	>	if ((as = counterCells) != null ||
1914	>	!U.compareAndSwapLong(this, BASECOUNT, b = baseCount, s = b + x)) {
1915	>	CounterHashCode hc; CounterCell a; long v; int m;
1916	>	boolean uncontended = true;
1917	>	if ((hc = threadCounterHashCode.get()) == null ||
1918	>	as == null || (m = as.length - 1) < 0 ||
1919	>	(a = as[m & hc.code]) == null ||
1920	>	!(uncontended =
1921	>	U.compareAndSwapLong(a, CELLVALUE, v = a.value, v + x))) {
1922	>	fullAddCount(x, hc, uncontended);
1923	>	return;
1924	>	}
1925	>	if (check <= 1)
1926	>	return;
1927	>	s = sumCount();
1928	>	}
1929	>	if (check >= 0) {
1930	>	Node<V>[] tab, nt; int sc;
1931	>	while (s >= (long)(sc = sizeCtl) && (tab = table) != null &&
1932	>	tab.length < MAXIMUM_CAPACITY) {
1933	>	if (sc < 0) {
1934	>	if (sc == -1 || transferIndex <= transferOrigin ||
1935	>	(nt = nextTable) == null)
1936	>	break;
1937	>	if (U.compareAndSwapInt(this, SIZECTL, sc, sc - 1))
1938	>	transfer(tab, nt);
1939		}
1940	<	} finally {
1941	<	sizeCtl = sc;
1940	>	else if (U.compareAndSwapInt(this, SIZECTL, sc, -2))
1941	>	transfer(tab, null);
1942	>	s = sumCount();
1943		}
1944		}
1945		}
#	Line 1948 | Line 1949 | public class ConcurrentHashMapV8<K, V>
1949		*
1950		* @param size number of elements (doesn't need to be perfectly accurate)
1951		*/
1952	<	private final void tryPresize(int size) {
1952	>	@SuppressWarnings("unchecked") private final void tryPresize(int size) {
1953		int c = (size >= (MAXIMUM_CAPACITY >>> 1)) ? MAXIMUM_CAPACITY :
1954		tableSizeFor(size + (size >>> 1) + 1);
1955		int sc;
1956		while ((sc = sizeCtl) >= 0) {
1957	<	Node[] tab = table; int n;
1957	>	Node<V>[] tab = table; int n;
1958		if (tab == null || (n = tab.length) == 0) {
1959		n = (sc > c) ? sc : c;
1960	<	if (UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) {
1960	>	if (U.compareAndSwapInt(this, SIZECTL, sc, -1)) {
1961		try {
1962		if (table == tab) {
1963	<	table = new Node[n];
1963	>	@SuppressWarnings("rawtypes") Node[] tb = new Node[n];
1964	>	table = (Node<V>[])tb;
1965		sc = n - (n >>> 2);
1966		}
1967		} finally {
#	Line 1969 | Line 1971 | public class ConcurrentHashMapV8<K, V>
1971		}
1972		else if (c <= sc || n >= MAXIMUM_CAPACITY)
1973		break;
1974	<	else if (UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) {
1975	<	try {
1976	<	if (table == tab) {
1975	<	table = rebuild(tab);
1976	<	sc = (n << 1) - (n >>> 1);
1977	<	}
1978	<	} finally {
1979	<	sizeCtl = sc;
1980	<	}
1981	<	}
1974	>	else if (tab == table &&
1975	>	U.compareAndSwapInt(this, SIZECTL, sc, -2))
1976	>	transfer(tab, null);
1977		}
1978		}
1979
1980		/*
1981		* Moves and/or copies the nodes in each bin to new table. See
1982		* above for explanation.
1988	–	*
1989	–	* @return the new table
1983		*/
1984	<	private static final Node[] rebuild(Node[] tab) {
1985	<	int n = tab.length;
1986	<	Node[] nextTab = new Node[n << 1];
1987	<	Node fwd = new Node(MOVED, nextTab, null, null);
1988	<	int[] buffer = null;       // holds bins to revisit; null until needed
1989	<	Node rev = null;           // reverse forwarder; null until needed
1990	<	int nbuffered = 0;         // the number of bins in buffer list
1991	<	int bufferIndex = 0;       // buffer index of current buffered bin
1992	<	int bin = n - 1;           // current non-buffered bin or -1 if none
1993	<
1994	<	for (int i = bin;;) {      // start upwards sweep
1995	<	int fh; Node f;
1996	<	if ((f = tabAt(tab, i)) == null) {
1997	<	if (bin >= 0) {    // no lock needed (or available)
1998	<	if (!casTabAt(tab, i, f, fwd))
1999	<	continue;
2000	<	}
2001	<	else {             // transiently use a locked forwarding node
2002	<	Node g = new Node(MOVED|LOCKED, nextTab, null, null);
2003	<	if (!casTabAt(tab, i, f, g))
2004	<	continue;
1984	>	@SuppressWarnings("unchecked") private final void transfer
1985	>	(Node<V>[] tab, Node<V>[] nextTab) {
1986	>	int n = tab.length, stride;
1987	>	if ((stride = (NCPU > 1) ? (n >>> 3) / NCPU : n) < MIN_TRANSFER_STRIDE)
1988	>	stride = MIN_TRANSFER_STRIDE; // subdivide range
1989	>	if (nextTab == null) {            // initiating
1990	>	try {
1991	>	@SuppressWarnings("rawtypes") Node[] tb = new Node[n << 1];
1992	>	nextTab = (Node<V>[])tb;
1993	>	} catch (Throwable ex) {      // try to cope with OOME
1994	>	sizeCtl = Integer.MAX_VALUE;
1995	>	return;
1996	>	}
1997	>	nextTable = nextTab;
1998	>	transferOrigin = n;
1999	>	transferIndex = n;
2000	>	Node<V> rev = new Node<V>(MOVED, tab, null, null);
2001	>	for (int k = n; k > 0;) {    // progressively reveal ready slots
2002	>	int nextk = (k > stride) ? k - stride : 0;
2003	>	for (int m = nextk; m < k; ++m)
2004	>	nextTab[m] = rev;
2005	>	for (int m = n + nextk; m < n + k; ++m)
2006	>	nextTab[m] = rev;
2007	>	U.putOrderedInt(this, TRANSFERORIGIN, k = nextk);
2008	>	}
2009	>	}
2010	>	int nextn = nextTab.length;
2011	>	Node<V> fwd = new Node<V>(MOVED, nextTab, null, null);
2012	>	boolean advance = true;
2013	>	for (int i = 0, bound = 0;;) {
2014	>	int nextIndex, nextBound; Node<V> f; Object fk;
2015	>	while (advance) {
2016	>	if (--i >= bound)
2017	>	advance = false;
2018	>	else if ((nextIndex = transferIndex) <= transferOrigin) {
2019	>	i = -1;
2020	>	advance = false;
2021	>	}
2022	>	else if (U.compareAndSwapInt
2023	>	(this, TRANSFERINDEX, nextIndex,
2024	>	nextBound = (nextIndex > stride ?
2025	>	nextIndex - stride : 0))) {
2026	>	bound = nextBound;
2027	>	i = nextIndex - 1;
2028	>	advance = false;
2029	>	}
2030	>	}
2031	>	if (i < 0 || i >= n || i + n >= nextn) {
2032	>	for (int sc;;) {
2033	>	if (U.compareAndSwapInt(this, SIZECTL, sc = sizeCtl, ++sc)) {
2034	>	if (sc == -1) {
2035	>	nextTable = null;
2036	>	table = nextTab;
2037	>	sizeCtl = (n << 1) - (n >>> 1);
2038	>	}
2039	>	return;
2040	>	}
2041	>	}
2042	>	}
2043	>	else if ((f = tabAt(tab, i)) == null) {
2044	>	if (casTabAt(tab, i, null, fwd)) {
2045		setTabAt(nextTab, i, null);
2046		setTabAt(nextTab, i + n, null);
2047	<	setTabAt(tab, i, fwd);
2015	<	if (!g.casHash(MOVED|LOCKED, MOVED)) {
2016	<	g.hash = MOVED;
2017	<	synchronized (g) { g.notifyAll(); }
2018	<	}
2047	>	advance = true;
2048		}
2049		}
2050	<	else if ((fh = f.hash) == MOVED) {
2051	<	Object fk = f.key;
2052	<	if (fk instanceof TreeBin) {
2053	<	TreeBin t = (TreeBin)fk;
2054	<	boolean validated = false;
2055	<	t.acquire(0);
2056	<	try {
2057	<	if (tabAt(tab, i) == f) {
2058	<	validated = true;
2059	<	splitTreeBin(nextTab, i, t);
2060	<	setTabAt(tab, i, fwd);
2050	>	else if (f.hash >= 0) {
2051	>	synchronized (f) {
2052	>	if (tabAt(tab, i) == f) {
2053	>	int runBit = f.hash & n;
2054	>	Node<V> lastRun = f, lo = null, hi = null;
2055	>	for (Node<V> p = f.next; p != null; p = p.next) {
2056	>	int b = p.hash & n;
2057	>	if (b != runBit) {
2058	>	runBit = b;
2059	>	lastRun = p;
2060	>	}
2061		}
2062	<	} finally {
2063	<	t.release(0);
2062	>	if (runBit == 0)
2063	>	lo = lastRun;
2064	>	else
2065	>	hi = lastRun;
2066	>	for (Node<V> p = f; p != lastRun; p = p.next) {
2067	>	int ph = p.hash;
2068	>	Object pk = p.key; V pv = p.val;
2069	>	if ((ph & n) == 0)
2070	>	lo = new Node<V>(ph, pk, pv, lo);
2071	>	else
2072	>	hi = new Node<V>(ph, pk, pv, hi);
2073	>	}
2074	>	setTabAt(nextTab, i, lo);
2075	>	setTabAt(nextTab, i + n, hi);
2076	>	setTabAt(tab, i, fwd);
2077	>	advance = true;
2078		}
2036	–	if (!validated)
2037	–	continue;
2079		}
2080		}
2081	<	else if ((fh & LOCKED) == 0 && f.casHash(fh, fh|LOCKED)) {
2082	<	boolean validated = false;
2083	<	try {              // split to lo and hi lists; copying as needed
2081	>	else if ((fk = f.key) instanceof TreeBin) {
2082	>	TreeBin<V> t = (TreeBin<V>)fk;
2083	>	t.acquire(0);
2084	>	try {
2085		if (tabAt(tab, i) == f) {
2086	<	validated = true;
2087	<	splitBin(nextTab, i, f);
2086	>	TreeBin<V> lt = new TreeBin<V>();
2087	>	TreeBin<V> ht = new TreeBin<V>();
2088	>	int lc = 0, hc = 0;
2089	>	for (Node<V> e = t.first; e != null; e = e.next) {
2090	>	int h = e.hash;
2091	>	Object k = e.key; V v = e.val;
2092	>	if ((h & n) == 0) {
2093	>	++lc;
2094	>	lt.putTreeNode(h, k, v);
2095	>	}
2096	>	else {
2097	>	++hc;
2098	>	ht.putTreeNode(h, k, v);
2099	>	}
2100	>	}
2101	>	Node<V> ln, hn; // throw away trees if too small
2102	>	if (lc < TREE_THRESHOLD) {
2103	>	ln = null;
2104	>	for (Node<V> p = lt.first; p != null; p = p.next)
2105	>	ln = new Node<V>(p.hash, p.key, p.val, ln);
2106	>	}
2107	>	else
2108	>	ln = new Node<V>(MOVED, lt, null, null);
2109	>	setTabAt(nextTab, i, ln);
2110	>	if (hc < TREE_THRESHOLD) {
2111	>	hn = null;
2112	>	for (Node<V> p = ht.first; p != null; p = p.next)
2113	>	hn = new Node<V>(p.hash, p.key, p.val, hn);
2114	>	}
2115	>	else
2116	>	hn = new Node<V>(MOVED, ht, null, null);
2117	>	setTabAt(nextTab, i + n, hn);
2118		setTabAt(tab, i, fwd);
2119	+	advance = true;
2120		}
2121		} finally {
2122	<	if (!f.casHash(fh | LOCKED, fh)) {
2050	<	f.hash = fh;
2051	<	synchronized (f) { f.notifyAll(); };
2052	<	}
2122	>	t.release(0);
2123		}
2054	–	if (!validated)
2055	–	continue;
2056	–	}
2057	–	else {
2058	–	if (buffer == null) // initialize buffer for revisits
2059	–	buffer = new int[TRANSFER_BUFFER_SIZE];
2060	–	if (bin < 0 && bufferIndex > 0) {
2061	–	int j = buffer[--bufferIndex];
2062	–	buffer[bufferIndex] = i;
2063	–	i = j;         // swap with another bin
2064	–	continue;
2065	–	}
2066	–	if (bin < 0 || nbuffered >= TRANSFER_BUFFER_SIZE) {
2067	–	f.tryAwaitLock(tab, i);
2068	–	continue;      // no other options -- block
2069	–	}
2070	–	if (rev == null)   // initialize reverse-forwarder
2071	–	rev = new Node(MOVED, tab, null, null);
2072	–	if (tabAt(tab, i) != f || (f.hash & LOCKED) == 0)
2073	–	continue;      // recheck before adding to list
2074	–	buffer[nbuffered++] = i;
2075	–	setTabAt(nextTab, i, rev);     // install place-holders
2076	–	setTabAt(nextTab, i + n, rev);
2077	–	}
2078	–
2079	–	if (bin > 0)
2080	–	i = --bin;
2081	–	else if (buffer != null && nbuffered > 0) {
2082	–	bin = -1;
2083	–	i = buffer[bufferIndex = --nbuffered];
2124		}
2125		else
2126	<	return nextTab;
2126	>	advance = true; // already processed
2127		}
2128		}
2129
2130	<	/**
2131	<	* Splits a normal bin with list headed by e into lo and hi parts;
2132	<	* installs in given table.
2133	<	*/
2134	<	private static void splitBin(Node[] nextTab, int i, Node e) {
2135	<	int bit = nextTab.length >>> 1; // bit to split on
2136	<	int runBit = e.hash & bit;
2137	<	Node lastRun = e, lo = null, hi = null;
2138	<	for (Node p = e.next; p != null; p = p.next) {
2099	<	int b = p.hash & bit;
2100	<	if (b != runBit) {
2101	<	runBit = b;
2102	<	lastRun = p;
2130	>	/* ---------------- Counter support -------------- */
2131	>
2132	>	final long sumCount() {
2133	>	CounterCell[] as = counterCells; CounterCell a;
2134	>	long sum = baseCount;
2135	>	if (as != null) {
2136	>	for (int i = 0; i < as.length; ++i) {
2137	>	if ((a = as[i]) != null)
2138	>	sum += a.value;
2139		}
2140		}
2141	<	if (runBit == 0)
2106	<	lo = lastRun;
2107	<	else
2108	<	hi = lastRun;
2109	<	for (Node p = e; p != lastRun; p = p.next) {
2110	<	int ph = p.hash & HASH_BITS;
2111	<	Object pk = p.key, pv = p.val;
2112	<	if ((ph & bit) == 0)
2113	<	lo = new Node(ph, pk, pv, lo);
2114	<	else
2115	<	hi = new Node(ph, pk, pv, hi);
2116	<	}
2117	<	setTabAt(nextTab, i, lo);
2118	<	setTabAt(nextTab, i + bit, hi);
2141	>	return sum;
2142		}
2143
2144	<	/**
2145	<	* Splits a tree bin into lo and hi parts; installs in given table.
2146	<	*/
2147	<	private static void splitTreeBin(Node[] nextTab, int i, TreeBin t) {
2148	<	int bit = nextTab.length >>> 1;
2149	<	TreeBin lt = new TreeBin();
2150	<	TreeBin ht = new TreeBin();
2151	<	int lc = 0, hc = 0;
2152	<	for (Node e = t.first; e != null; e = e.next) {
2130	<	int h = e.hash & HASH_BITS;
2131	<	Object k = e.key, v = e.val;
2132	<	if ((h & bit) == 0) {
2133	<	++lc;
2134	<	lt.putTreeNode(h, k, v);
2135	<	}
2136	<	else {
2137	<	++hc;
2138	<	ht.putTreeNode(h, k, v);
2139	<	}
2140	<	}
2141	<	Node ln, hn; // throw away trees if too small
2142	<	if (lc <= (TREE_THRESHOLD >>> 1)) {
2143	<	ln = null;
2144	<	for (Node p = lt.first; p != null; p = p.next)
2145	<	ln = new Node(p.hash, p.key, p.val, ln);
2146	<	}
2147	<	else
2148	<	ln = new Node(MOVED, lt, null, null);
2149	<	setTabAt(nextTab, i, ln);
2150	<	if (hc <= (TREE_THRESHOLD >>> 1)) {
2151	<	hn = null;
2152	<	for (Node p = ht.first; p != null; p = p.next)
2153	<	hn = new Node(p.hash, p.key, p.val, hn);
2144	>	// See LongAdder version for explanation
2145	>	private final void fullAddCount(long x, CounterHashCode hc,
2146	>	boolean wasUncontended) {
2147	>	int h;
2148	>	if (hc == null) {
2149	>	hc = new CounterHashCode();
2150	>	int s = counterHashCodeGenerator.addAndGet(SEED_INCREMENT);
2151	>	h = hc.code = (s == 0) ? 1 : s; // Avoid zero
2152	>	threadCounterHashCode.set(hc);
2153		}
2154		else
2155	<	hn = new Node(MOVED, ht, null, null);
2156	<	setTabAt(nextTab, i + bit, hn);
2157	<	}
2158	<
2159	<	/**
2160	<	* Implementation for clear. Steps through each bin, removing all
2161	<	* nodes.
2162	<	*/
2163	<	private final void internalClear() {
2164	<	long delta = 0L; // negative number of deletions
2165	<	int i = 0;
2166	<	Node[] tab = table;
2167	<	while (tab != null && i < tab.length) {
2168	<	int fh; Object fk;
2169	<	Node f = tabAt(tab, i);
2170	<	if (f == null)
2171	<	++i;
2172	<	else if ((fh = f.hash) == MOVED) {
2173	<	if ((fk = f.key) instanceof TreeBin) {
2174	<	TreeBin t = (TreeBin)fk;
2175	<	t.acquire(0);
2177	<	try {
2178	<	if (tabAt(tab, i) == f) {
2179	<	for (Node p = t.first; p != null; p = p.next) {
2180	<	p.val = null;
2181	<	--delta;
2155	>	h = hc.code;
2156	>	boolean collide = false;                // True if last slot nonempty
2157	>	for (;;) {
2158	>	CounterCell[] as; CounterCell a; int n; long v;
2159	>	if ((as = counterCells) != null && (n = as.length) > 0) {
2160	>	if ((a = as[(n - 1) & h]) == null) {
2161	>	if (counterBusy == 0) {            // Try to attach new Cell
2162	>	CounterCell r = new CounterCell(x); // Optimistic create
2163	>	if (counterBusy == 0 &&
2164	>	U.compareAndSwapInt(this, COUNTERBUSY, 0, 1)) {
2165	>	boolean created = false;
2166	>	try {               // Recheck under lock
2167	>	CounterCell[] rs; int m, j;
2168	>	if ((rs = counterCells) != null &&
2169	>	(m = rs.length) > 0 &&
2170	>	rs[j = (m - 1) & h] == null) {
2171	>	rs[j] = r;
2172	>	created = true;
2173	>	}
2174	>	} finally {
2175	>	counterBusy = 0;
2176		}
2177	<	t.first = null;
2178	<	t.root = null;
2179	<	++i;
2177	>	if (created)
2178	>	break;
2179	>	continue;           // Slot is now non-empty
2180		}
2187	–	} finally {
2188	–	t.release(0);
2181		}
2182	+	collide = false;
2183		}
2184	<	else
2185	<	tab = (Node[])fk;
2186	<	}
2187	<	else if ((fh & LOCKED) != 0) {
2188	<	counter.add(delta); // opportunistically update count
2189	<	delta = 0L;
2190	<	f.tryAwaitLock(tab, i);
2191	<	}
2192	<	else if (f.casHash(fh, fh | LOCKED)) {
2193	<	try {
2194	<	if (tabAt(tab, i) == f) {
2195	<	for (Node e = f; e != null; e = e.next) {
2196	<	e.val = null;
2197	<	--delta;
2184	>	else if (!wasUncontended)       // CAS already known to fail
2185	>	wasUncontended = true;      // Continue after rehash
2186	>	else if (U.compareAndSwapLong(a, CELLVALUE, v = a.value, v + x))
2187	>	break;
2188	>	else if (counterCells != as || n >= NCPU)
2189	>	collide = false;            // At max size or stale
2190	>	else if (!collide)
2191	>	collide = true;
2192	>	else if (counterBusy == 0 &&
2193	>	U.compareAndSwapInt(this, COUNTERBUSY, 0, 1)) {
2194	>	try {
2195	>	if (counterCells == as) {// Expand table unless stale
2196	>	CounterCell[] rs = new CounterCell[n << 1];
2197	>	for (int i = 0; i < n; ++i)
2198	>	rs[i] = as[i];
2199	>	counterCells = rs;
2200		}
2201	<	setTabAt(tab, i, null);
2202	<	++i;
2201	>	} finally {
2202	>	counterBusy = 0;
2203		}
2204	<	} finally {
2205	<	if (!f.casHash(fh | LOCKED, fh)) {
2206	<	f.hash = fh;
2207	<	synchronized (f) { f.notifyAll(); };
2204	>	collide = false;
2205	>	continue;                   // Retry with expanded table
2206	>	}
2207	>	h ^= h << 13;                   // Rehash
2208	>	h ^= h >>> 17;
2209	>	h ^= h << 5;
2210	>	}
2211	>	else if (counterBusy == 0 && counterCells == as &&
2212	>	U.compareAndSwapInt(this, COUNTERBUSY, 0, 1)) {
2213	>	boolean init = false;
2214	>	try {                           // Initialize table
2215	>	if (counterCells == as) {
2216	>	CounterCell[] rs = new CounterCell[2];
2217	>	rs[h & 1] = new CounterCell(x);
2218	>	counterCells = rs;
2219	>	init = true;
2220		}
2221	+	} finally {
2222	+	counterBusy = 0;
2223		}
2224	+	if (init)
2225	+	break;
2226		}
2227	+	else if (U.compareAndSwapLong(this, BASECOUNT, v = baseCount, v + x))
2228	+	break;                          // Fall back on using base
2229		}
2230	<	if (delta != 0)
2218	<	counter.add(delta);
2230	>	hc.code = h;                            // Record index for next time
2231		}
2232
2233		/* ----------------Table Traversal -------------- */
2234
2235		/**
2236		* Encapsulates traversal for methods such as containsValue; also
2237	<	* serves as a base class for other iterators.
2237	>	* serves as a base class for other iterators and bulk tasks.
2238		*
2239		* At each step, the iterator snapshots the key ("nextKey") and
2240		* value ("nextVal") of a valid node (i.e., one that, at point of
#	Line 2230 | Line 2242 | public class ConcurrentHashMapV8<K, V>
2242		* change (including to null, indicating deletion), field nextVal
2243		* might not be accurate at point of use, but still maintains the
2244		* weak consistency property of holding a value that was once
2245	<	* valid.
2245	>	* valid. To support iterator.remove, the nextKey field is not
2246	>	* updated (nulled out) when the iterator cannot advance.
2247		*
2248		* Internal traversals directly access these fields, as in:
2249		* {@code while (it.advance() != null) { process(it.nextKey); }}
#	Line 2257 | Line 2270 | public class ConcurrentHashMapV8<K, V>
2270		* across threads, iteration terminates if a bounds checks fails
2271		* for a table read.
2272		*
2273	<	* This class extends ForkJoinTask to streamline parallel
2274	<	* iteration in bulk operations (see BulkTask). This adds only an
2275	<	* int of space overhead, which is close enough to negligible in
2276	<	* cases where it is not needed to not worry about it.
2273	>	* This class extends CountedCompleter to streamline parallel
2274	>	* iteration in bulk operations. This adds only a few fields of
2275	>	* space overhead, which is small enough in cases where it is not
2276	>	* needed to not worry about it.  Because CountedCompleter is
2277	>	* Serializable, but iterators need not be, we need to add warning
2278	>	* suppressions.
2279		*/
2280	<	static class Traverser<K,V,R> extends ForkJoinTask<R> {
2280	>	@SuppressWarnings("serial") static class Traverser<K,V,R>
2281	>	extends CountedCompleter<R> {
2282		final ConcurrentHashMapV8<K, V> map;
2283	<	Node next;           // the next entry to use
2268	<	Node last;           // the last entry used
2283	>	Node<V> next;        // the next entry to use
2284		Object nextKey;      // cached key field of next
2285	<	Object nextVal;      // cached val field of next
2286	<	Node[] tab;          // current table; updated if resized
2285	>	V nextVal;           // cached val field of next
2286	>	Node<V>[] tab;       // current table; updated if resized
2287		int index;           // index of bin to use next
2288		int baseIndex;       // current index of initial table
2289		int baseLimit;       // index bound for initial table
2290	<	final int baseSize;  // initial table size
2290	>	int baseSize;        // initial table size
2291	>	int batch;           // split control
2292
2293		/** Creates iterator for all entries in the table. */
2294		Traverser(ConcurrentHashMapV8<K, V> map) {
2295	<	this.tab = (this.map = map).table;
2280	<	baseLimit = baseSize = (tab == null) ? 0 : tab.length;
2295	>	this.map = map;
2296		}
2297
2298	<	/** Creates iterator for split() methods */
2299	<	Traverser(Traverser<K,V,?> it, boolean split) {
2300	<	this.map = it.map;
2301	<	this.tab = it.tab;
2302	<	this.baseSize = it.baseSize;
2303	<	int lo = it.baseIndex;
2304	<	int hi = this.baseLimit = it.baseLimit;
2305	<	int i;
2306	<	if (split) // adjust parent
2307	<	i = it.baseLimit = (lo + hi + 1) >>> 1;
2308	<	else       // clone parent
2309	<	i = lo;
2310	<	this.index = this.baseIndex = i;
2298	>	/** Creates iterator for split() methods and task constructors */
2299	>	Traverser(ConcurrentHashMapV8<K,V> map, Traverser<K,V,?> it, int batch) {
2300	>	super(it);
2301	>	this.batch = batch;
2302	>	if ((this.map = map) != null && it != null) { // split parent
2303	>	Node<V>[] t;
2304	>	if ((t = it.tab) == null &&
2305	>	(t = it.tab = map.table) != null)
2306	>	it.baseLimit = it.baseSize = t.length;
2307	>	this.tab = t;
2308	>	this.baseSize = it.baseSize;
2309	>	int hi = this.baseLimit = it.baseLimit;
2310	>	it.baseLimit = this.index = this.baseIndex =
2311	>	(hi + it.baseIndex + 1) >>> 1;
2312	>	}
2313		}
2314
2315		/**
2316		* Advances next; returns nextVal or null if terminated.
2317		* See above for explanation.
2318		*/
2319	<	final Object advance() {
2320	<	Node e = last = next;
2321	<	Object ev = null;
2319	>	@SuppressWarnings("unchecked") final V advance() {
2320	>	Node<V> e = next;
2321	>	V ev = null;
2322		outer: do {
2323		if (e != null)                  // advance past used/skipped node
2324		e = e.next;
2325		while (e == null) {             // get to next non-null bin
2326	<	Node[] t; int b, i, n; Object ek; // checks must use locals
2327	<	if ((b = baseIndex) >= baseLimit || (i = index) < 0 ||
2328	<	(t = tab) == null || i >= (n = t.length))
2326	>	ConcurrentHashMapV8<K, V> m;
2327	>	Node<V>[] t; int b, i, n; Object ek; //  must use locals
2328	>	if ((t = tab) != null)
2329	>	n = t.length;
2330	>	else if ((m = map) != null && (t = tab = m.table) != null)
2331	>	n = baseLimit = baseSize = t.length;
2332	>	else
2333		break outer;
2334	<	else if ((e = tabAt(t, i)) != null && e.hash == MOVED) {
2334	>	if ((b = baseIndex) >= baseLimit ||
2335	>	(i = index) < 0 || i >= n)
2336	>	break outer;
2337	>	if ((e = tabAt(t, i)) != null && e.hash < 0) {
2338		if ((ek = e.key) instanceof TreeBin)
2339	<	e = ((TreeBin)ek).first;
2339	>	e = ((TreeBin<V>)ek).first;
2340		else {
2341	<	tab = (Node[])ek;
2341	>	tab = (Node<V>[])ek;
2342		continue;           // restarts due to null val
2343		}
2344		}                           // visit upper slots if present
#	Line 2327 | Line 2351 | public class ConcurrentHashMapV8<K, V>
2351		}
2352
2353		public final void remove() {
2354	<	if (nextVal == null && last == null)
2355	<	advance();
2332	<	Node e = last;
2333	<	if (e == null)
2354	>	Object k = nextKey;
2355	>	if (k == null && (advance() == null || (k = nextKey) == null))
2356		throw new IllegalStateException();
2357	<	last = null;
2336	<	map.remove(e.key);
2357	>	map.internalReplace(k, null, null);
2358		}
2359
2360		public final boolean hasNext() {
#	Line 2341 | Line 2362 | public class ConcurrentHashMapV8<K, V>
2362		}
2363
2364		public final boolean hasMoreElements() { return hasNext(); }
2365	<	public final void setRawResult(Object x) { }
2366	<	public R getRawResult() { return null; }
2367	<	public boolean exec() { return true; }
2365	>
2366	>	public void compute() { } // default no-op CountedCompleter body
2367	>
2368	>	/**
2369	>	* Returns a batch value > 0 if this task should (and must) be
2370	>	* split, if so, adding to pending count, and in any case
2371	>	* updating batch value. The initial batch value is approx
2372	>	* exp2 of the number of times (minus one) to split task by
2373	>	* two before executing leaf action. This value is faster to
2374	>	* compute and more convenient to use as a guide to splitting
2375	>	* than is the depth, since it is used while dividing by two
2376	>	* anyway.
2377	>	*/
2378	>	final int preSplit() {
2379	>	ConcurrentHashMapV8<K, V> m; int b; Node<V>[] t;  ForkJoinPool pool;
2380	>	if ((b = batch) < 0 && (m = map) != null) { // force initialization
2381	>	if ((t = tab) == null && (t = tab = m.table) != null)
2382	>	baseLimit = baseSize = t.length;
2383	>	if (t != null) {
2384	>	long n = m.sumCount();
2385	>	int par = ((pool = getPool()) == null) ?
2386	>	ForkJoinPool.getCommonPoolParallelism() :
2387	>	pool.getParallelism();
2388	>	int sp = par << 3; // slack of 8
2389	>	b = (n <= 0L) ? 0 : (n < (long)sp) ? (int)n : sp;
2390	>	}
2391	>	}
2392	>	b = (b <= 1 || baseIndex == baseLimit) ? 0 : (b >>> 1);
2393	>	if ((batch = b) > 0)
2394	>	addToPendingCount(1);
2395	>	return b;
2396	>	}
2397	>
2398		}
2399
2400		/* ---------------- Public operations -------------- */
#	Line 2352 | Line 2403 | public class ConcurrentHashMapV8<K, V>
2403		* Creates a new, empty map with the default initial table size (16).
2404		*/
2405		public ConcurrentHashMapV8() {
2355	–	this.counter = new LongAdder();
2406		}
2407
2408		/**
#	Line 2371 | Line 2421 | public class ConcurrentHashMapV8<K, V>
2421		int cap = ((initialCapacity >= (MAXIMUM_CAPACITY >>> 1)) ?
2422		MAXIMUM_CAPACITY :
2423		tableSizeFor(initialCapacity + (initialCapacity >>> 1) + 1));
2374	–	this.counter = new LongAdder();
2424		this.sizeCtl = cap;
2425		}
2426
#	Line 2381 | Line 2430 | public class ConcurrentHashMapV8<K, V>
2430		* @param m the map
2431		*/
2432		public ConcurrentHashMapV8(Map<? extends K, ? extends V> m) {
2384	–	this.counter = new LongAdder();
2433		this.sizeCtl = DEFAULT_CAPACITY;
2434		internalPutAll(m);
2435		}
#	Line 2432 | Line 2480 | public class ConcurrentHashMapV8<K, V>
2480		long size = (long)(1.0 + (long)initialCapacity / loadFactor);
2481		int cap = (size >= (long)MAXIMUM_CAPACITY) ?
2482		MAXIMUM_CAPACITY : tableSizeFor((int)size);
2435	–	this.counter = new LongAdder();
2483		this.sizeCtl = cap;
2484		}
2485
2486		/**
2487	+	* Creates a new {@link Set} backed by a ConcurrentHashMapV8
2488	+	* from the given type to {@code Boolean.TRUE}.
2489	+	*
2490	+	* @return the new set
2491	+	*/
2492	+	public static <K> KeySetView<K,Boolean> newKeySet() {
2493	+	return new KeySetView<K,Boolean>(new ConcurrentHashMapV8<K,Boolean>(),
2494	+	Boolean.TRUE);
2495	+	}
2496	+
2497	+	/**
2498	+	* Creates a new {@link Set} backed by a ConcurrentHashMapV8
2499	+	* from the given type to {@code Boolean.TRUE}.
2500	+	*
2501	+	* @param initialCapacity The implementation performs internal
2502	+	* sizing to accommodate this many elements.
2503	+	* @throws IllegalArgumentException if the initial capacity of
2504	+	* elements is negative
2505	+	* @return the new set
2506	+	*/
2507	+	public static <K> KeySetView<K,Boolean> newKeySet(int initialCapacity) {
2508	+	return new KeySetView<K,Boolean>
2509	+	(new ConcurrentHashMapV8<K,Boolean>(initialCapacity), Boolean.TRUE);
2510	+	}
2511	+
2512	+	/**
2513		* {@inheritDoc}
2514		*/
2515		public boolean isEmpty() {
2516	<	return counter.sum() <= 0L; // ignore transient negative values
2516	>	return sumCount() <= 0L; // ignore transient negative values
2517		}
2518
2519		/**
2520		* {@inheritDoc}
2521		*/
2522		public int size() {
2523	<	long n = counter.sum();
2523	>	long n = sumCount();
2524		return ((n < 0L) ? 0 :
2525		(n > (long)Integer.MAX_VALUE) ? Integer.MAX_VALUE :
2526		(int)n);
#	Line 2455 | Line 2528 | public class ConcurrentHashMapV8<K, V>
2528
2529		/**
2530		* Returns the number of mappings. This method should be used
2531	<	* instead of {@link #size} because a ConcurrentHashMap may
2531	>	* instead of {@link #size} because a ConcurrentHashMapV8 may
2532		* contain more mappings than can be represented as an int. The
2533	<	* value returned is a snapshot; the actual count may differ if
2534	<	* there are ongoing concurrent insertions of removals.
2533	>	* value returned is an estimate; the actual count may differ if
2534	>	* there are concurrent insertions or removals.
2535		*
2536		* @return the number of mappings
2537		*/
2538		public long mappingCount() {
2539	<	long n = counter.sum();
2540	<	return (n < 0L) ? 0L : n;
2539	>	long n = sumCount();
2540	>	return (n < 0L) ? 0L : n; // ignore transient negative values
2541		}
2542
2543		/**
#	Line 2478 | Line 2551 | public class ConcurrentHashMapV8<K, V>
2551		*
2552		* @throws NullPointerException if the specified key is null
2553		*/
2554	<	@SuppressWarnings("unchecked")
2555	<	public V get(Object key) {
2556	<	if (key == null)
2557	<	throw new NullPointerException();
2558	<	return (V)internalGet(key);
2554	>	public V get(Object key) {
2555	>	return internalGet(key);
2556	>	}
2557	>
2558	>	/**
2559	>	* Returns the value to which the specified key is mapped,
2560	>	* or the given defaultValue if this map contains no mapping for the key.
2561	>	*
2562	>	* @param key the key
2563	>	* @param defaultValue the value to return if this map contains
2564	>	* no mapping for the given key
2565	>	* @return the mapping for the key, if present; else the defaultValue
2566	>	* @throws NullPointerException if the specified key is null
2567	>	*/
2568	>	public V getValueOrDefault(Object key, V defaultValue) {
2569	>	V v;
2570	>	return (v = internalGet(key)) == null ? defaultValue : v;
2571		}
2572
2573		/**
#	Line 2495 | Line 2580 | public class ConcurrentHashMapV8<K, V>
2580		* @throws NullPointerException if the specified key is null
2581		*/
2582		public boolean containsKey(Object key) {
2498	–	if (key == null)
2499	–	throw new NullPointerException();
2583		return internalGet(key) != null;
2584		}
2585
#	Line 2513 | Line 2596 | public class ConcurrentHashMapV8<K, V>
2596		public boolean containsValue(Object value) {
2597		if (value == null)
2598		throw new NullPointerException();
2599	<	Object v;
2599	>	V v;
2600		Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
2601		while ((v = it.advance()) != null) {
2602		if (v == value || value.equals(v))
#	Line 2537 | Line 2620 | public class ConcurrentHashMapV8<K, V>
2620		*         {@code false} otherwise
2621		* @throws NullPointerException if the specified value is null
2622		*/
2623	<	public boolean contains(Object value) {
2623	>	@Deprecated public boolean contains(Object value) {
2624		return containsValue(value);
2625		}
2626
#	Line 2545 | Line 2628 | public class ConcurrentHashMapV8<K, V>
2628		* Maps the specified key to the specified value in this table.
2629		* Neither the key nor the value can be null.
2630		*
2631	<	* <p> The value can be retrieved by calling the {@code get} method
2631	>	* <p>The value can be retrieved by calling the {@code get} method
2632		* with a key that is equal to the original key.
2633		*
2634		* @param key key with which the specified value is to be associated
#	Line 2554 | Line 2637 | public class ConcurrentHashMapV8<K, V>
2637		*         {@code null} if there was no mapping for {@code key}
2638		* @throws NullPointerException if the specified key or value is null
2639		*/
2640	<	@SuppressWarnings("unchecked")
2641	<	public V put(K key, V value) {
2559	<	if (key == null || value == null)
2560	<	throw new NullPointerException();
2561	<	return (V)internalPut(key, value);
2640	>	public V put(K key, V value) {
2641	>	return internalPut(key, value, false);
2642		}
2643
2644		/**
#	Line 2568 | Line 2648 | public class ConcurrentHashMapV8<K, V>
2648		*         or {@code null} if there was no mapping for the key
2649		* @throws NullPointerException if the specified key or value is null
2650		*/
2651	<	@SuppressWarnings("unchecked")
2652	<	public V putIfAbsent(K key, V value) {
2573	<	if (key == null || value == null)
2574	<	throw new NullPointerException();
2575	<	return (V)internalPutIfAbsent(key, value);
2651	>	public V putIfAbsent(K key, V value) {
2652	>	return internalPut(key, value, true);
2653		}
2654
2655		/**
#	Line 2616 | Line 2693 | public class ConcurrentHashMapV8<K, V>
2693		* @param key key with which the specified value is to be associated
2694		* @param mappingFunction the function to compute a value
2695		* @return the current (existing or computed) value associated with
2696	<	*         the specified key, or null if the computed value is null.
2696	>	*         the specified key, or null if the computed value is null
2697		* @throws NullPointerException if the specified key or mappingFunction
2698		*         is null
2699		* @throws IllegalStateException if the computation detectably
#	Line 2625 | Line 2702 | public class ConcurrentHashMapV8<K, V>
2702		* @throws RuntimeException or Error if the mappingFunction does so,
2703		*         in which case the mapping is left unestablished
2704		*/
2705	<	@SuppressWarnings("unchecked")
2706	<	public V computeIfAbsent(K key, Fun<? super K, ? extends V> mappingFunction) {
2707	<	if (key == null || mappingFunction == null)
2631	<	throw new NullPointerException();
2632	<	return (V)internalComputeIfAbsent(key, mappingFunction);
2705	>	public V computeIfAbsent
2706	>	(K key, Fun<? super K, ? extends V> mappingFunction) {
2707	>	return internalComputeIfAbsent(key, mappingFunction);
2708		}
2709
2710		/**
#	Line 2666 | Line 2741 | public class ConcurrentHashMapV8<K, V>
2741		* @throws RuntimeException or Error if the remappingFunction does so,
2742		*         in which case the mapping is unchanged
2743		*/
2744	<	public V computeIfPresent(K key, BiFun<? super K, ? super V, ? extends V> remappingFunction) {
2745	<	if (key == null || remappingFunction == null)
2746	<	throw new NullPointerException();
2672	<	return (V)internalCompute(key, true, remappingFunction);
2744	>	public V computeIfPresent
2745	>	(K key, BiFun<? super K, ? super V, ? extends V> remappingFunction) {
2746	>	return internalCompute(key, true, remappingFunction);
2747		}
2748
2749		/**
#	Line 2712 | Line 2786 | public class ConcurrentHashMapV8<K, V>
2786		* @throws RuntimeException or Error if the remappingFunction does so,
2787		*         in which case the mapping is unchanged
2788		*/
2789	<	//    @SuppressWarnings("unchecked")
2790	<	public V compute(K key, BiFun<? super K, ? super V, ? extends V> remappingFunction) {
2791	<	if (key == null || remappingFunction == null)
2718	<	throw new NullPointerException();
2719	<	return (V)internalCompute(key, false, remappingFunction);
2789	>	public V compute
2790	>	(K key, BiFun<? super K, ? super V, ? extends V> remappingFunction) {
2791	>	return internalCompute(key, false, remappingFunction);
2792		}
2793
2794		/**
#	Line 2744 | Line 2816 | public class ConcurrentHashMapV8<K, V>
2816		* so the computation should be short and simple, and must not
2817		* attempt to update any other mappings of this Map.
2818		*/
2819	<	//    @SuppressWarnings("unchecked")
2820	<	public V merge(K key, V value, BiFun<? super V, ? super V, ? extends V> remappingFunction) {
2821	<	if (key == null || value == null || remappingFunction == null)
2822	<	throw new NullPointerException();
2751	<	return (V)internalMerge(key, value, remappingFunction);
2819	>	public V merge
2820	>	(K key, V value,
2821	>	BiFun<? super V, ? super V, ? extends V> remappingFunction) {
2822	>	return internalMerge(key, value, remappingFunction);
2823		}
2824
2825		/**
#	Line 2760 | Line 2831 | public class ConcurrentHashMapV8<K, V>
2831		*         {@code null} if there was no mapping for {@code key}
2832		* @throws NullPointerException if the specified key is null
2833		*/
2834	<	@SuppressWarnings("unchecked")
2835	<	public V remove(Object key) {
2765	<	if (key == null)
2766	<	throw new NullPointerException();
2767	<	return (V)internalReplace(key, null, null);
2834	>	public V remove(Object key) {
2835	>	return internalReplace(key, null, null);
2836		}
2837
2838		/**
#	Line 2773 | Line 2841 | public class ConcurrentHashMapV8<K, V>
2841		* @throws NullPointerException if the specified key is null
2842		*/
2843		public boolean remove(Object key, Object value) {
2844	<	if (key == null)
2777	<	throw new NullPointerException();
2778	<	if (value == null)
2779	<	return false;
2780	<	return internalReplace(key, null, value) != null;
2844	>	return value != null && internalReplace(key, null, value) != null;
2845		}
2846
2847		/**
#	Line 2798 | Line 2862 | public class ConcurrentHashMapV8<K, V>
2862		*         or {@code null} if there was no mapping for the key
2863		* @throws NullPointerException if the specified key or value is null
2864		*/
2865	<	@SuppressWarnings("unchecked")
2802	<	public V replace(K key, V value) {
2865	>	public V replace(K key, V value) {
2866		if (key == null || value == null)
2867		throw new NullPointerException();
2868	<	return (V)internalReplace(key, value, null);
2868	>	return internalReplace(key, value, null);
2869		}
2870
2871		/**
#	Line 2815 | Line 2878 | public class ConcurrentHashMapV8<K, V>
2878		/**
2879		* Returns a {@link Set} view of the keys contained in this map.
2880		* The set is backed by the map, so changes to the map are
2881	<	* reflected in the set, and vice-versa.  The set supports element
2819	<	* removal, which removes the corresponding mapping from this map,
2820	<	* via the {@code Iterator.remove}, {@code Set.remove},
2821	<	* {@code removeAll}, {@code retainAll}, and {@code clear}
2822	<	* operations.  It does not support the {@code add} or
2823	<	* {@code addAll} operations.
2881	>	* reflected in the set, and vice-versa.
2882		*
2883	<	* <p>The view's {@code iterator} is a "weakly consistent" iterator
2884	<	* that will never throw {@link ConcurrentModificationException},
2885	<	* and guarantees to traverse elements as they existed upon
2886	<	* construction of the iterator, and may (but is not guaranteed to)
2887	<	* reflect any modifications subsequent to construction.
2883	>	* @return the set view
2884	>	*/
2885	>	public KeySetView<K,V> keySet() {
2886	>	KeySetView<K,V> ks = keySet;
2887	>	return (ks != null) ? ks : (keySet = new KeySetView<K,V>(this, null));
2888	>	}
2889	>
2890	>	/**
2891	>	* Returns a {@link Set} view of the keys in this map, using the
2892	>	* given common mapped value for any additions (i.e., {@link
2893	>	* Collection#add} and {@link Collection#addAll}). This is of
2894	>	* course only appropriate if it is acceptable to use the same
2895	>	* value for all additions from this view.
2896	>	*
2897	>	* @param mappedValue the mapped value to use for any
2898	>	* additions.
2899	>	* @return the set view
2900	>	* @throws NullPointerException if the mappedValue is null
2901		*/
2902	<	public Set<K> keySet() {
2903	<	KeySet<K,V> ks = keySet;
2904	<	return (ks != null) ? ks : (keySet = new KeySet<K,V>(this));
2902	>	public KeySetView<K,V> keySet(V mappedValue) {
2903	>	if (mappedValue == null)
2904	>	throw new NullPointerException();
2905	>	return new KeySetView<K,V>(this, mappedValue);
2906		}
2907
2908		/**
2909		* Returns a {@link Collection} view of the values contained in this map.
2910		* The collection is backed by the map, so changes to the map are
2911	<	* reflected in the collection, and vice-versa.  The collection
2840	<	* supports element removal, which removes the corresponding
2841	<	* mapping from this map, via the {@code Iterator.remove},
2842	<	* {@code Collection.remove}, {@code removeAll},
2843	<	* {@code retainAll}, and {@code clear} operations.  It does not
2844	<	* support the {@code add} or {@code addAll} operations.
2845	<	*
2846	<	* <p>The view's {@code iterator} is a "weakly consistent" iterator
2847	<	* that will never throw {@link ConcurrentModificationException},
2848	<	* and guarantees to traverse elements as they existed upon
2849	<	* construction of the iterator, and may (but is not guaranteed to)
2850	<	* reflect any modifications subsequent to construction.
2911	>	* reflected in the collection, and vice-versa.
2912		*/
2913	<	public Collection<V> values() {
2914	<	Values<K,V> vs = values;
2915	<	return (vs != null) ? vs : (values = new Values<K,V>(this));
2913	>	public ValuesView<K,V> values() {
2914	>	ValuesView<K,V> vs = values;
2915	>	return (vs != null) ? vs : (values = new ValuesView<K,V>(this));
2916		}
2917
2918		/**
#	Line 2871 | Line 2932 | public class ConcurrentHashMapV8<K, V>
2932		* reflect any modifications subsequent to construction.
2933		*/
2934		public Set<Map.Entry<K,V>> entrySet() {
2935	<	EntrySet<K,V> es = entrySet;
2936	<	return (es != null) ? es : (entrySet = new EntrySet<K,V>(this));
2935	>	EntrySetView<K,V> es = entrySet;
2936	>	return (es != null) ? es : (entrySet = new EntrySetView<K,V>(this));
2937		}
2938
2939		/**
#	Line 2932 | Line 2993 | public class ConcurrentHashMapV8<K, V>
2993		public int hashCode() {
2994		int h = 0;
2995		Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
2996	<	Object v;
2996	>	V v;
2997		while ((v = it.advance()) != null) {
2998		h += it.nextKey.hashCode() ^ v.hashCode();
2999		}
#	Line 2954 | Line 3015 | public class ConcurrentHashMapV8<K, V>
3015		Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3016		StringBuilder sb = new StringBuilder();
3017		sb.append('{');
3018	<	Object v;
3018	>	V v;
3019		if ((v = it.advance()) != null) {
3020		for (;;) {
3021		Object k = it.nextKey;
#	Line 2985 | Line 3046 | public class ConcurrentHashMapV8<K, V>
3046		return false;
3047		Map<?,?> m = (Map<?,?>) o;
3048		Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3049	<	Object val;
3049	>	V val;
3050		while ((val = it.advance()) != null) {
3051		Object v = m.get(it.nextKey);
3052		if (v == null || (v != val && !v.equals(val)))
#	Line 3005 | Line 3066 | public class ConcurrentHashMapV8<K, V>
3066
3067		/* ----------------Iterators -------------- */
3068
3069	<	static final class KeyIterator<K,V> extends Traverser<K,V,Object>
3069	>	@SuppressWarnings("serial") static final class KeyIterator<K,V>
3070	>	extends Traverser<K,V,Object>
3071		implements Spliterator<K>, Enumeration<K> {
3072		KeyIterator(ConcurrentHashMapV8<K, V> map) { super(map); }
3073	<	KeyIterator(Traverser<K,V,Object> it, boolean split) {
3074	<	super(it, split);
3073	>	KeyIterator(ConcurrentHashMapV8<K, V> map, Traverser<K,V,Object> it) {
3074	>	super(map, it, -1);
3075		}
3076		public KeyIterator<K,V> split() {
3077	<	if (last != null || (next != null && nextVal == null))
3077	>	if (nextKey != null)
3078		throw new IllegalStateException();
3079	<	return new KeyIterator<K,V>(this, true);
3079	>	return new KeyIterator<K,V>(map, this);
3080		}
3081	<	@SuppressWarnings("unchecked")
3020	<	public final K next() {
3081	>	@SuppressWarnings("unchecked") public final K next() {
3082		if (nextVal == null && advance() == null)
3083		throw new NoSuchElementException();
3084		Object k = nextKey;
#	Line 3028 | Line 3089 | public class ConcurrentHashMapV8<K, V>
3089		public final K nextElement() { return next(); }
3090		}
3091
3092	<	static final class ValueIterator<K,V> extends Traverser<K,V,Object>
3092	>	@SuppressWarnings("serial") static final class ValueIterator<K,V>
3093	>	extends Traverser<K,V,Object>
3094		implements Spliterator<V>, Enumeration<V> {
3095		ValueIterator(ConcurrentHashMapV8<K, V> map) { super(map); }
3096	<	ValueIterator(Traverser<K,V,Object> it, boolean split) {
3097	<	super(it, split);
3096	>	ValueIterator(ConcurrentHashMapV8<K, V> map, Traverser<K,V,Object> it) {
3097	>	super(map, it, -1);
3098		}
3099		public ValueIterator<K,V> split() {
3100	<	if (last != null || (next != null && nextVal == null))
3100	>	if (nextKey != null)
3101		throw new IllegalStateException();
3102	<	return new ValueIterator<K,V>(this, true);
3102	>	return new ValueIterator<K,V>(map, this);
3103		}
3104
3105	<	@SuppressWarnings("unchecked")
3106	<	public final V next() {
3045	<	Object v;
3105	>	public final V next() {
3106	>	V v;
3107		if ((v = nextVal) == null && (v = advance()) == null)
3108		throw new NoSuchElementException();
3109		nextVal = null;
3110	<	return (V) v;
3110	>	return v;
3111		}
3112
3113		public final V nextElement() { return next(); }
3114		}
3115
3116	<	static final class EntryIterator<K,V> extends Traverser<K,V,Object>
3116	>	@SuppressWarnings("serial") static final class EntryIterator<K,V>
3117	>	extends Traverser<K,V,Object>
3118		implements Spliterator<Map.Entry<K,V>> {
3119		EntryIterator(ConcurrentHashMapV8<K, V> map) { super(map); }
3120	<	EntryIterator(Traverser<K,V,Object> it, boolean split) {
3121	<	super(it, split);
3120	>	EntryIterator(ConcurrentHashMapV8<K, V> map, Traverser<K,V,Object> it) {
3121	>	super(map, it, -1);
3122		}
3123		public EntryIterator<K,V> split() {
3124	<	if (last != null || (next != null && nextVal == null))
3124	>	if (nextKey != null)
3125		throw new IllegalStateException();
3126	<	return new EntryIterator<K,V>(this, true);
3126	>	return new EntryIterator<K,V>(map, this);
3127		}
3128
3129	<	@SuppressWarnings("unchecked")
3130	<	public final Map.Entry<K,V> next() {
3069	<	Object v;
3129	>	@SuppressWarnings("unchecked") public final Map.Entry<K,V> next() {
3130	>	V v;
3131		if ((v = nextVal) == null && (v = advance()) == null)
3132		throw new NoSuchElementException();
3133		Object k = nextKey;
3134		nextVal = null;
3135	<	return new MapEntry<K,V>((K)k, (V)v, map);
3135	>	return new MapEntry<K,V>((K)k, v, map);
3136		}
3137		}
3138
#	Line 3118 | Line 3179 | public class ConcurrentHashMapV8<K, V>
3179		}
3180		}
3181
3121	–	/* ----------------Views -------------- */
3122	–
3182		/**
3183	<	* Base class for views.
3183	>	* Returns exportable snapshot entry for the given key and value
3184	>	* when write-through can't or shouldn't be used.
3185		*/
3186	<	static abstract class CHMView<K, V> {
3187	<	final ConcurrentHashMapV8<K, V> map;
3128	<	CHMView(ConcurrentHashMapV8<K, V> map)  { this.map = map; }
3129	<	public final int size()                 { return map.size(); }
3130	<	public final boolean isEmpty()          { return map.isEmpty(); }
3131	<	public final void clear()               { map.clear(); }
3132	<
3133	<	// implementations below rely on concrete classes supplying these
3134	<	abstract public Iterator<?> iterator();
3135	<	abstract public boolean contains(Object o);
3136	<	abstract public boolean remove(Object o);
3137	<
3138	<	private static final String oomeMsg = "Required array size too large";
3139	<
3140	<	public final Object[] toArray() {
3141	<	long sz = map.mappingCount();
3142	<	if (sz > (long)(MAX_ARRAY_SIZE))
3143	<	throw new OutOfMemoryError(oomeMsg);
3144	<	int n = (int)sz;
3145	<	Object[] r = new Object[n];
3146	<	int i = 0;
3147	<	Iterator<?> it = iterator();
3148	<	while (it.hasNext()) {
3149	<	if (i == n) {
3150	<	if (n >= MAX_ARRAY_SIZE)
3151	<	throw new OutOfMemoryError(oomeMsg);
3152	<	if (n >= MAX_ARRAY_SIZE - (MAX_ARRAY_SIZE >>> 1) - 1)
3153	<	n = MAX_ARRAY_SIZE;
3154	<	else
3155	<	n += (n >>> 1) + 1;
3156	<	r = Arrays.copyOf(r, n);
3157	<	}
3158	<	r[i++] = it.next();
3159	<	}
3160	<	return (i == n) ? r : Arrays.copyOf(r, i);
3161	<	}
3162	<
3163	<	@SuppressWarnings("unchecked")
3164	<	public final <T> T[] toArray(T[] a) {
3165	<	long sz = map.mappingCount();
3166	<	if (sz > (long)(MAX_ARRAY_SIZE))
3167	<	throw new OutOfMemoryError(oomeMsg);
3168	<	int m = (int)sz;
3169	<	T[] r = (a.length >= m) ? a :
3170	<	(T[])java.lang.reflect.Array
3171	<	.newInstance(a.getClass().getComponentType(), m);
3172	<	int n = r.length;
3173	<	int i = 0;
3174	<	Iterator<?> it = iterator();
3175	<	while (it.hasNext()) {
3176	<	if (i == n) {
3177	<	if (n >= MAX_ARRAY_SIZE)
3178	<	throw new OutOfMemoryError(oomeMsg);
3179	<	if (n >= MAX_ARRAY_SIZE - (MAX_ARRAY_SIZE >>> 1) - 1)
3180	<	n = MAX_ARRAY_SIZE;
3181	<	else
3182	<	n += (n >>> 1) + 1;
3183	<	r = Arrays.copyOf(r, n);
3184	<	}
3185	<	r[i++] = (T)it.next();
3186	<	}
3187	<	if (a == r && i < n) {
3188	<	r[i] = null; // null-terminate
3189	<	return r;
3190	<	}
3191	<	return (i == n) ? r : Arrays.copyOf(r, i);
3192	<	}
3193	<
3194	<	public final int hashCode() {
3195	<	int h = 0;
3196	<	for (Iterator<?> it = iterator(); it.hasNext();)
3197	<	h += it.next().hashCode();
3198	<	return h;
3199	<	}
3200	<
3201	<	public final String toString() {
3202	<	StringBuilder sb = new StringBuilder();
3203	<	sb.append('[');
3204	<	Iterator<?> it = iterator();
3205	<	if (it.hasNext()) {
3206	<	for (;;) {
3207	<	Object e = it.next();
3208	<	sb.append(e == this ? "(this Collection)" : e);
3209	<	if (!it.hasNext())
3210	<	break;
3211	<	sb.append(',').append(' ');
3212	<	}
3213	<	}
3214	<	return sb.append(']').toString();
3215	<	}
3216	<
3217	<	public final boolean containsAll(Collection<?> c) {
3218	<	if (c != this) {
3219	<	for (Iterator<?> it = c.iterator(); it.hasNext();) {
3220	<	Object e = it.next();
3221	<	if (e == null || !contains(e))
3222	<	return false;
3223	<	}
3224	<	}
3225	<	return true;
3226	<	}
3227	<
3228	<	public final boolean removeAll(Collection<?> c) {
3229	<	boolean modified = false;
3230	<	for (Iterator<?> it = iterator(); it.hasNext();) {
3231	<	if (c.contains(it.next())) {
3232	<	it.remove();
3233	<	modified = true;
3234	<	}
3235	<	}
3236	<	return modified;
3237	<	}
3238	<
3239	<	public final boolean retainAll(Collection<?> c) {
3240	<	boolean modified = false;
3241	<	for (Iterator<?> it = iterator(); it.hasNext();) {
3242	<	if (!c.contains(it.next())) {
3243	<	it.remove();
3244	<	modified = true;
3245	<	}
3246	<	}
3247	<	return modified;
3248	<	}
3249	<
3250	<	}
3251	<
3252	<	static final class KeySet<K,V> extends CHMView<K,V> implements Set<K> {
3253	<	KeySet(ConcurrentHashMapV8<K, V> map)  {
3254	<	super(map);
3255	<	}
3256	<	public final boolean contains(Object o) { return map.containsKey(o); }
3257	<	public final boolean remove(Object o)   { return map.remove(o) != null; }
3258	<	public final Iterator<K> iterator() {
3259	<	return new KeyIterator<K,V>(map);
3260	<	}
3261	<	public final boolean add(K e) {
3262	<	throw new UnsupportedOperationException();
3263	<	}
3264	<	public final boolean addAll(Collection<? extends K> c) {
3265	<	throw new UnsupportedOperationException();
3266	<	}
3267	<	public boolean equals(Object o) {
3268	<	Set<?> c;
3269	<	return ((o instanceof Set) &&
3270	<	((c = (Set<?>)o) == this ||
3271	<	(containsAll(c) && c.containsAll(this))));
3272	<	}
3273	<	}
3274	<
3275	<
3276	<	static final class Values<K,V> extends CHMView<K,V>
3277	<	implements Collection<V> {
3278	<	Values(ConcurrentHashMapV8<K, V> map)   { super(map); }
3279	<	public final boolean contains(Object o) { return map.containsValue(o); }
3280	<	public final boolean remove(Object o) {
3281	<	if (o != null) {
3282	<	Iterator<V> it = new ValueIterator<K,V>(map);
3283	<	while (it.hasNext()) {
3284	<	if (o.equals(it.next())) {
3285	<	it.remove();
3286	<	return true;
3287	<	}
3288	<	}
3289	<	}
3290	<	return false;
3291	<	}
3292	<	public final Iterator<V> iterator() {
3293	<	return new ValueIterator<K,V>(map);
3294	<	}
3295	<	public final boolean add(V e) {
3296	<	throw new UnsupportedOperationException();
3297	<	}
3298	<	public final boolean addAll(Collection<? extends V> c) {
3299	<	throw new UnsupportedOperationException();
3300	<	}
3301	<
3302	<	}
3303	<
3304	<	static final class EntrySet<K,V> extends CHMView<K,V>
3305	<	implements Set<Map.Entry<K,V>> {
3306	<	EntrySet(ConcurrentHashMapV8<K, V> map) { super(map); }
3307	<	public final boolean contains(Object o) {
3308	<	Object k, v, r; Map.Entry<?,?> e;
3309	<	return ((o instanceof Map.Entry) &&
3310	<	(k = (e = (Map.Entry<?,?>)o).getKey()) != null &&
3311	<	(r = map.get(k)) != null &&
3312	<	(v = e.getValue()) != null &&
3313	<	(v == r || v.equals(r)));
3314	<	}
3315	<	public final boolean remove(Object o) {
3316	<	Object k, v; Map.Entry<?,?> e;
3317	<	return ((o instanceof Map.Entry) &&
3318	<	(k = (e = (Map.Entry<?,?>)o).getKey()) != null &&
3319	<	(v = e.getValue()) != null &&
3320	<	map.remove(k, v));
3321	<	}
3322	<	public final Iterator<Map.Entry<K,V>> iterator() {
3323	<	return new EntryIterator<K,V>(map);
3324	<	}
3325	<	public final boolean add(Entry<K,V> e) {
3326	<	throw new UnsupportedOperationException();
3327	<	}
3328	<	public final boolean addAll(Collection<? extends Entry<K,V>> c) {
3329	<	throw new UnsupportedOperationException();
3330	<	}
3331	<	public boolean equals(Object o) {
3332	<	Set<?> c;
3333	<	return ((o instanceof Set) &&
3334	<	((c = (Set<?>)o) == this ||
3335	<	(containsAll(c) && c.containsAll(this))));
3336	<	}
3186	>	static <K,V> AbstractMap.SimpleEntry<K,V> entryFor(K k, V v) {
3187	>	return new AbstractMap.SimpleEntry<K,V>(k, v);
3188		}
3189
3190		/* ---------------- Serialization Support -------------- */
#	Line 3357 | Line 3208 | public class ConcurrentHashMapV8<K, V>
3208		* for each key-value mapping, followed by a null pair.
3209		* The key-value mappings are emitted in no particular order.
3210		*/
3211	<	@SuppressWarnings("unchecked")
3212	<	private void writeObject(java.io.ObjectOutputStream s)
3211	>	@SuppressWarnings("unchecked") private void writeObject
3212	>	(java.io.ObjectOutputStream s)
3213		throws java.io.IOException {
3214		if (segments == null) { // for serialization compatibility
3215		segments = (Segment<K,V>[])
#	Line 3368 | Line 3219 | public class ConcurrentHashMapV8<K, V>
3219		}
3220		s.defaultWriteObject();
3221		Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3222	<	Object v;
3222	>	V v;
3223		while ((v = it.advance()) != null) {
3224		s.writeObject(it.nextKey);
3225		s.writeObject(v);
#	Line 3382 | Line 3233 | public class ConcurrentHashMapV8<K, V>
3233		* Reconstitutes the instance from a stream (that is, deserializes it).
3234		* @param s the stream
3235		*/
3236	<	@SuppressWarnings("unchecked")
3237	<	private void readObject(java.io.ObjectInputStream s)
3236	>	@SuppressWarnings("unchecked") private void readObject
3237	>	(java.io.ObjectInputStream s)
3238		throws java.io.IOException, ClassNotFoundException {
3239		s.defaultReadObject();
3240		this.segments = null; // unneeded
3390	–	// initialize transient final field
3391	–	UNSAFE.putObjectVolatile(this, counterOffset, new LongAdder());
3241
3242		// Create all nodes, then place in table once size is known
3243		long size = 0L;
3244	<	Node p = null;
3244	>	Node<V> p = null;
3245		for (;;) {
3246		K k = (K) s.readObject();
3247		V v = (V) s.readObject();
3248		if (k != null && v != null) {
3249		int h = spread(k.hashCode());
3250	<	p = new Node(h, k, v, p);
3250	>	p = new Node<V>(h, k, v, p);
3251		++size;
3252		}
3253		else
#	Line 3416 | Line 3265 | public class ConcurrentHashMapV8<K, V>
3265		int sc = sizeCtl;
3266		boolean collide = false;
3267		if (n > sc &&
3268	<	UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) {
3268	>	U.compareAndSwapInt(this, SIZECTL, sc, -1)) {
3269		try {
3270		if (table == null) {
3271		init = true;
3272	<	Node[] tab = new Node[n];
3272	>	@SuppressWarnings("rawtypes") Node[] rt = new Node[n];
3273	>	Node<V>[] tab = (Node<V>[])rt;
3274		int mask = n - 1;
3275		while (p != null) {
3276		int j = p.hash & mask;
3277	<	Node next = p.next;
3278	<	Node q = p.next = tabAt(tab, j);
3277	>	Node<V> next = p.next;
3278	>	Node<V> q = p.next = tabAt(tab, j);
3279		setTabAt(tab, j, p);
3280		if (!collide && q != null && q.hash == p.hash)
3281		collide = true;
3282		p = next;
3283		}
3284		table = tab;
3285	<	counter.add(size);
3285	>	addCount(size, -1);
3286		sc = n - (n >>> 2);
3287		}
3288		} finally {
3289		sizeCtl = sc;
3290		}
3291		if (collide) { // rescan and convert to TreeBins
3292	<	Node[] tab = table;
3292	>	Node<V>[] tab = table;
3293		for (int i = 0; i < tab.length; ++i) {
3294		int c = 0;
3295	<	for (Node e = tabAt(tab, i); e != null; e = e.next) {
3295	>	for (Node<V> e = tabAt(tab, i); e != null; e = e.next) {
3296		if (++c > TREE_THRESHOLD &&
3297		(e.key instanceof Comparable)) {
3298		replaceWithTreeBin(tab, i, e.key);
#	Line 3454 | Line 3304 | public class ConcurrentHashMapV8<K, V>
3304		}
3305		if (!init) { // Can only happen if unsafely published.
3306		while (p != null) {
3307	<	internalPut(p.key, p.val);
3307	>	internalPut((K)p.key, p.val, false);
3308		p = p.next;
3309		}
3310		}
3311		}
3312		}
3313
3464	–
3314		// -------------------------------------------------------
3315
3316		// Sams
#	Line 3503 | Line 3352 | public class ConcurrentHashMapV8<K, V>
3352
3353		// -------------------------------------------------------
3354
3355	+	// Sequential bulk operations
3356	+
3357		/**
3358	<	* Returns an extended {@link Parallel} view of this map using the
3508	<	* given executor for bulk parallel operations.
3358	>	* Performs the given action for each (key, value).
3359		*
3360	<	* @param executor the executor
3511	<	* @return a parallel view
3360	>	* @param action the action
3361		*/
3362	<	public Parallel parallel(ForkJoinPool executor)  {
3363	<	return new Parallel(executor);
3362	>	@SuppressWarnings("unchecked") public void forEachSequentially
3363	>	(BiAction<K,V> action) {
3364	>	if (action == null) throw new NullPointerException();
3365	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3366	>	V v;
3367	>	while ((v = it.advance()) != null)
3368	>	action.apply((K)it.nextKey, v);
3369		}
3370
3371		/**
3372	<	* An extended view of a ConcurrentHashMap supporting bulk
3373	<	* parallel operations. These operations are designed to be
3374	<	* safely, and often sensibly, applied even with maps that are
3375	<	* being concurrently updated by other threads; for example, when
3376	<	* computing a snapshot summary of the values in a shared
3377	<	* registry.  There are three kinds of operation, each with four
3378	<	* forms, accepting functions with Keys, Values, Entries, and
3525	<	* (Key, Value) arguments and/or return values. Because the
3526	<	* elements of a ConcurrentHashMap are not ordered in any
3527	<	* particular way, and may be processed in different orders in
3528	<	* different parallel executions, the correctness of supplied
3529	<	* functions should not depend on any ordering, or on any other
3530	<	* objects or values that may transiently change while computation
3531	<	* is in progress; and except for forEach actions, should ideally
3532	<	* be side-effect-free.
3533	<	*
3534	<	* <ul>
3535	<	* <li> forEach: Perform a given action on each element.
3536	<	* A variant form applies a given transformation on each element
3537	<	* before performing the action.</li>
3538	<	*
3539	<	* <li> search: Return the first available non-null result of
3540	<	* applying a given function on each element; skipping further
3541	<	* search when a result is found.</li>
3542	<	*
3543	<	* <li> reduce: Accumulate each element.  The supplied reduction
3544	<	* function cannot rely on ordering (more formally, it should be
3545	<	* both associative and commutative).  There are five variants:
3546	<	*
3547	<	* <ul>
3548	<	*
3549	<	* <li> Plain reductions. (There is not a form of this method for
3550	<	* (key, value) function arguments since there is no corresponding
3551	<	* return type.)</li>
3552	<	*
3553	<	* <li> Mapped reductions that accumulate the results of a given
3554	<	* function applied to each element.</li>
3555	<	*
3556	<	* <li> Reductions to scalar doubles, longs, and ints, using a
3557	<	* given basis value.</li>
3558	<	*
3559	<	* </li>
3560	<	* </ul>
3561	<	* </ul>
3562	<	*
3563	<	* <p>The concurrency properties of the bulk operations follow
3564	<	* from those of ConcurrentHashMap: Any non-null result returned
3565	<	* from {@code get(key)} and related access methods bears a
3566	<	* happens-before relation with the associated insertion or
3567	<	* update.  The result of any bulk operation reflects the
3568	<	* composition of these per-element relations (but is not
3569	<	* necessarily atomic with respect to the map as a whole unless it
3570	<	* is somehow known to be quiescent).  Conversely, because keys
3571	<	* and values in the map are never null, null serves as a reliable
3572	<	* atomic indicator of the current lack of any result.  To
3573	<	* maintain this property, null serves as an implicit basis for
3574	<	* all non-scalar reduction operations. For the double, long, and
3575	<	* int versions, the basis should be one that, when combined with
3576	<	* any other value, returns that other value (more formally, it
3577	<	* should be the identity element for the reduction). Most common
3578	<	* reductions have these properties; for example, computing a sum
3579	<	* with basis 0 or a minimum with basis MAX_VALUE.
3580	<	*
3581	<	* <p>Search and transformation functions provided as arguments
3582	<	* should similarly return null to indicate the lack of any result
3583	<	* (in which case it is not used). In the case of mapped
3584	<	* reductions, this also enables transformations to serve as
3585	<	* filters, returning null (or, in the case of primitive
3586	<	* specializations, the identity basis) if the element should not
3587	<	* be combined. You can create compound transformations and
3588	<	* filterings by composing them yourself under this "null means
3589	<	* there is nothing there now" rule before using them in search or
3590	<	* reduce operations.
3591	<	*
3592	<	* <p>Methods accepting and/or returning Entry arguments maintain
3593	<	* key-value associations. They may be useful for example when
3594	<	* finding the key for the greatest value. Note that "plain" Entry
3595	<	* arguments can be supplied using {@code new
3596	<	* AbstractMap.SimpleEntry(k,v)}.
3597	<	*
3598	<	* <p> Bulk operations may complete abruptly, throwing an
3599	<	* exception encountered in the application of a supplied
3600	<	* function. Bear in mind when handling such exceptions that other
3601	<	* concurrently executing functions could also have thrown
3602	<	* exceptions, or would have done so if the first exception had
3603	<	* not occurred.
3604	<	*
3605	<	* <p>Parallel speedups compared to sequential processing are
3606	<	* common but not guaranteed.  Operations involving brief
3607	<	* functions on small maps may execute more slowly than sequential
3608	<	* loops if the underlying work to parallelize the computation is
3609	<	* more expensive than the computation itself. Similarly,
3610	<	* parallelization may not lead to much actual parallelism if all
3611	<	* processors are busy performing unrelated tasks.
3612	<	*
3613	<	* <p> All arguments to all task methods must be non-null.
3614	<	*
3615	<	* <p><em>jsr166e note: During transition, this class
3616	<	* uses nested functional interfaces with different names but the
3617	<	* same forms as those expected for JDK8.<em>
3372	>	* Performs the given action for each non-null transformation
3373	>	* of each (key, value).
3374	>	*
3375	>	* @param transformer a function returning the transformation
3376	>	* for an element, or null of there is no transformation (in
3377	>	* which case the action is not applied).
3378	>	* @param action the action
3379		*/
3380	<	public class Parallel {
3381	<	final ForkJoinPool fjp;
3382	<
3383	<	/**
3384	<	* Returns an extended view of this map using the given
3385	<	* executor for bulk parallel operations.
3386	<	*
3387	<	* @param executor the executor
3388	<	*/
3389	<	public Parallel(ForkJoinPool executor)  {
3629	<	this.fjp = executor;
3380	>	@SuppressWarnings("unchecked") public <U> void forEachSequentially
3381	>	(BiFun<? super K, ? super V, ? extends U> transformer,
3382	>	Action<U> action) {
3383	>	if (transformer == null || action == null)
3384	>	throw new NullPointerException();
3385	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3386	>	V v; U u;
3387	>	while ((v = it.advance()) != null) {
3388	>	if ((u = transformer.apply((K)it.nextKey, v)) != null)
3389	>	action.apply(u);
3390		}
3391	+	}
3392
3393	<	/**
3394	<	* Performs the given action for each (key, value).
3395	<	*
3396	<	* @param action the action
3397	<	*/
3398	<	public void forEach(BiAction<K,V> action) {
3399	<	fjp.invoke(ForkJoinTasks.forEach
3400	<	(ConcurrentHashMapV8.this, action));
3393	>	/**
3394	>	* Returns a non-null result from applying the given search
3395	>	* function on each (key, value), or null if none.
3396	>	*
3397	>	* @param searchFunction a function returning a non-null
3398	>	* result on success, else null
3399	>	* @return a non-null result from applying the given search
3400	>	* function on each (key, value), or null if none
3401	>	*/
3402	>	@SuppressWarnings("unchecked") public <U> U searchSequentially
3403	>	(BiFun<? super K, ? super V, ? extends U> searchFunction) {
3404	>	if (searchFunction == null) throw new NullPointerException();
3405	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3406	>	V v; U u;
3407	>	while ((v = it.advance()) != null) {
3408	>	if ((u = searchFunction.apply((K)it.nextKey, v)) != null)
3409	>	return u;
3410		}
3411	+	return null;
3412	+	}
3413
3414	<	/**
3415	<	* Performs the given action for each non-null transformation
3416	<	* of each (key, value).
3417	<	*
3418	<	* @param transformer a function returning the transformation
3419	<	* for an element, or null of there is no transformation (in
3420	<	* which case the action is not applied).
3421	<	* @param action the action
3422	<	*/
3423	<	public <U> void forEach(BiFun<? super K, ? super V, ? extends U> transformer,
3424	<	Action<U> action) {
3425	<	fjp.invoke(ForkJoinTasks.forEach
3426	<	(ConcurrentHashMapV8.this, transformer, action));
3414	>	/**
3415	>	* Returns the result of accumulating the given transformation
3416	>	* of all (key, value) pairs using the given reducer to
3417	>	* combine values, or null if none.
3418	>	*
3419	>	* @param transformer a function returning the transformation
3420	>	* for an element, or null of there is no transformation (in
3421	>	* which case it is not combined).
3422	>	* @param reducer a commutative associative combining function
3423	>	* @return the result of accumulating the given transformation
3424	>	* of all (key, value) pairs
3425	>	*/
3426	>	@SuppressWarnings("unchecked") public <U> U reduceSequentially
3427	>	(BiFun<? super K, ? super V, ? extends U> transformer,
3428	>	BiFun<? super U, ? super U, ? extends U> reducer) {
3429	>	if (transformer == null || reducer == null)
3430	>	throw new NullPointerException();
3431	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3432	>	U r = null, u; V v;
3433	>	while ((v = it.advance()) != null) {
3434	>	if ((u = transformer.apply((K)it.nextKey, v)) != null)
3435	>	r = (r == null) ? u : reducer.apply(r, u);
3436		}
3437	+	return r;
3438	+	}
3439
3440	<	/**
3441	<	* Returns a non-null result from applying the given search
3442	<	* function on each (key, value), or null if none.  Further
3443	<	* element processing is suppressed upon success. However,
3444	<	* this method does not return until other in-progress
3445	<	* parallel invocations of the search function also complete.
3446	<	*
3447	<	* @param searchFunction a function returning a non-null
3448	<	* result on success, else null
3449	<	* @return a non-null result from applying the given search
3450	<	* function on each (key, value), or null if none
3451	<	*/
3452	<	public <U> U search(BiFun<? super K, ? super V, ? extends U> searchFunction) {
3453	<	return fjp.invoke(ForkJoinTasks.search
3454	<	(ConcurrentHashMapV8.this, searchFunction));
3455	<	}
3440	>	/**
3441	>	* Returns the result of accumulating the given transformation
3442	>	* of all (key, value) pairs using the given reducer to
3443	>	* combine values, and the given basis as an identity value.
3444	>	*
3445	>	* @param transformer a function returning the transformation
3446	>	* for an element
3447	>	* @param basis the identity (initial default value) for the reduction
3448	>	* @param reducer a commutative associative combining function
3449	>	* @return the result of accumulating the given transformation
3450	>	* of all (key, value) pairs
3451	>	*/
3452	>	@SuppressWarnings("unchecked") public double reduceToDoubleSequentially
3453	>	(ObjectByObjectToDouble<? super K, ? super V> transformer,
3454	>	double basis,
3455	>	DoubleByDoubleToDouble reducer) {
3456	>	if (transformer == null || reducer == null)
3457	>	throw new NullPointerException();
3458	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3459	>	double r = basis; V v;
3460	>	while ((v = it.advance()) != null)
3461	>	r = reducer.apply(r, transformer.apply((K)it.nextKey, v));
3462	>	return r;
3463	>	}
3464
3465	<	/**
3466	<	* Returns the result of accumulating the given transformation
3467	<	* of all (key, value) pairs using the given reducer to
3468	<	* combine values, or null if none.
3469	<	*
3470	<	* @param transformer a function returning the transformation
3471	<	* for an element, or null of there is no transformation (in
3472	<	* which case it is not combined).
3473	<	* @param reducer a commutative associative combining function
3474	<	* @return the result of accumulating the given transformation
3475	<	* of all (key, value) pairs
3476	<	*/
3477	<	public <U> U reduce(BiFun<? super K, ? super V, ? extends U> transformer,
3478	<	BiFun<? super U, ? super U, ? extends U> reducer) {
3479	<	return fjp.invoke(ForkJoinTasks.reduce
3480	<	(ConcurrentHashMapV8.this, transformer, reducer));
3481	<	}
3465	>	/**
3466	>	* Returns the result of accumulating the given transformation
3467	>	* of all (key, value) pairs using the given reducer to
3468	>	* combine values, and the given basis as an identity value.
3469	>	*
3470	>	* @param transformer a function returning the transformation
3471	>	* for an element
3472	>	* @param basis the identity (initial default value) for the reduction
3473	>	* @param reducer a commutative associative combining function
3474	>	* @return the result of accumulating the given transformation
3475	>	* of all (key, value) pairs
3476	>	*/
3477	>	@SuppressWarnings("unchecked") public long reduceToLongSequentially
3478	>	(ObjectByObjectToLong<? super K, ? super V> transformer,
3479	>	long basis,
3480	>	LongByLongToLong reducer) {
3481	>	if (transformer == null || reducer == null)
3482	>	throw new NullPointerException();
3483	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3484	>	long r = basis; V v;
3485	>	while ((v = it.advance()) != null)
3486	>	r = reducer.apply(r, transformer.apply((K)it.nextKey, v));
3487	>	return r;
3488	>	}
3489
3490	<	/**
3491	<	* Returns the result of accumulating the given transformation
3492	<	* of all (key, value) pairs using the given reducer to
3493	<	* combine values, and the given basis as an identity value.
3494	<	*
3495	<	* @param transformer a function returning the transformation
3496	<	* for an element
3497	<	* @param basis the identity (initial default value) for the reduction
3498	<	* @param reducer a commutative associative combining function
3499	<	* @return the result of accumulating the given transformation
3500	<	* of all (key, value) pairs
3501	<	*/
3502	<	public double reduceToDouble(ObjectByObjectToDouble<? super K, ? super V> transformer,
3503	<	double basis,
3504	<	DoubleByDoubleToDouble reducer) {
3505	<	return fjp.invoke(ForkJoinTasks.reduceToDouble
3506	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
3507	<	}
3490	>	/**
3491	>	* Returns the result of accumulating the given transformation
3492	>	* of all (key, value) pairs using the given reducer to
3493	>	* combine values, and the given basis as an identity value.
3494	>	*
3495	>	* @param transformer a function returning the transformation
3496	>	* for an element
3497	>	* @param basis the identity (initial default value) for the reduction
3498	>	* @param reducer a commutative associative combining function
3499	>	* @return the result of accumulating the given transformation
3500	>	* of all (key, value) pairs
3501	>	*/
3502	>	@SuppressWarnings("unchecked") public int reduceToIntSequentially
3503	>	(ObjectByObjectToInt<? super K, ? super V> transformer,
3504	>	int basis,
3505	>	IntByIntToInt reducer) {
3506	>	if (transformer == null || reducer == null)
3507	>	throw new NullPointerException();
3508	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3509	>	int r = basis; V v;
3510	>	while ((v = it.advance()) != null)
3511	>	r = reducer.apply(r, transformer.apply((K)it.nextKey, v));
3512	>	return r;
3513	>	}
3514
3515	<	/**
3516	<	* Returns the result of accumulating the given transformation
3517	<	* of all (key, value) pairs using the given reducer to
3518	<	* combine values, and the given basis as an identity value.
3519	<	*
3520	<	* @param transformer a function returning the transformation
3521	<	* for an element
3522	<	* @param basis the identity (initial default value) for the reduction
3523	<	* @param reducer a commutative associative combining function
3524	<	* @return the result of accumulating the given transformation
3525	<	* of all (key, value) pairs using the given reducer to
3526	<	* combine values, and the given basis as an identity value.
3723	<	*/
3724	<	public long reduceToLong(ObjectByObjectToLong<? super K, ? super V> transformer,
3725	<	long basis,
3726	<	LongByLongToLong reducer) {
3727	<	return fjp.invoke(ForkJoinTasks.reduceToLong
3728	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
3729	<	}
3515	>	/**
3516	>	* Performs the given action for each key.
3517	>	*
3518	>	* @param action the action
3519	>	*/
3520	>	@SuppressWarnings("unchecked") public void forEachKeySequentially
3521	>	(Action<K> action) {
3522	>	if (action == null) throw new NullPointerException();
3523	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3524	>	while (it.advance() != null)
3525	>	action.apply((K)it.nextKey);
3526	>	}
3527
3528	<	/**
3529	<	* Returns the result of accumulating the given transformation
3530	<	* of all (key, value) pairs using the given reducer to
3531	<	* combine values, and the given basis as an identity value.
3532	<	*
3533	<	* @param transformer a function returning the transformation
3534	<	* for an element
3535	<	* @param basis the identity (initial default value) for the reduction
3536	<	* @param reducer a commutative associative combining function
3537	<	* @return the result of accumulating the given transformation
3538	<	* of all (key, value) pairs
3539	<	*/
3540	<	public int reduceToInt(ObjectByObjectToInt<? super K, ? super V> transformer,
3541	<	int basis,
3542	<	IntByIntToInt reducer) {
3543	<	return fjp.invoke(ForkJoinTasks.reduceToInt
3544	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
3528	>	/**
3529	>	* Performs the given action for each non-null transformation
3530	>	* of each key.
3531	>	*
3532	>	* @param transformer a function returning the transformation
3533	>	* for an element, or null of there is no transformation (in
3534	>	* which case the action is not applied).
3535	>	* @param action the action
3536	>	*/
3537	>	@SuppressWarnings("unchecked") public <U> void forEachKeySequentially
3538	>	(Fun<? super K, ? extends U> transformer,
3539	>	Action<U> action) {
3540	>	if (transformer == null || action == null)
3541	>	throw new NullPointerException();
3542	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3543	>	U u;
3544	>	while (it.advance() != null) {
3545	>	if ((u = transformer.apply((K)it.nextKey)) != null)
3546	>	action.apply(u);
3547		}
3548	+	ForkJoinTasks.forEachKey
3549	+	(this, transformer, action).invoke();
3550	+	}
3551
3552	<	/**
3553	<	* Performs the given action for each key.
3554	<	*
3555	<	* @param action the action
3556	<	*/
3557	<	public void forEachKey(Action<K> action) {
3558	<	fjp.invoke(ForkJoinTasks.forEachKey
3559	<	(ConcurrentHashMapV8.this, action));
3552	>	/**
3553	>	* Returns a non-null result from applying the given search
3554	>	* function on each key, or null if none.
3555	>	*
3556	>	* @param searchFunction a function returning a non-null
3557	>	* result on success, else null
3558	>	* @return a non-null result from applying the given search
3559	>	* function on each key, or null if none
3560	>	*/
3561	>	@SuppressWarnings("unchecked") public <U> U searchKeysSequentially
3562	>	(Fun<? super K, ? extends U> searchFunction) {
3563	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3564	>	U u;
3565	>	while (it.advance() != null) {
3566	>	if ((u = searchFunction.apply((K)it.nextKey)) != null)
3567	>	return u;
3568		}
3569	+	return null;
3570	+	}
3571
3572	<	/**
3573	<	* Performs the given action for each non-null transformation
3574	<	* of each key.
3575	<	*
3576	<	* @param transformer a function returning the transformation
3577	<	* for an element, or null of there is no transformation (in
3578	<	* which case the action is not applied).
3579	<	* @param action the action
3580	<	*/
3581	<	public <U> void forEachKey(Fun<? super K, ? extends U> transformer,
3582	<	Action<U> action) {
3583	<	fjp.invoke(ForkJoinTasks.forEachKey
3584	<	(ConcurrentHashMapV8.this, transformer, action));
3572	>	/**
3573	>	* Returns the result of accumulating all keys using the given
3574	>	* reducer to combine values, or null if none.
3575	>	*
3576	>	* @param reducer a commutative associative combining function
3577	>	* @return the result of accumulating all keys using the given
3578	>	* reducer to combine values, or null if none
3579	>	*/
3580	>	@SuppressWarnings("unchecked") public K reduceKeysSequentially
3581	>	(BiFun<? super K, ? super K, ? extends K> reducer) {
3582	>	if (reducer == null) throw new NullPointerException();
3583	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3584	>	K r = null;
3585	>	while (it.advance() != null) {
3586	>	K u = (K)it.nextKey;
3587	>	r = (r == null) ? u : reducer.apply(r, u);
3588	>	}
3589	>	return r;
3590	>	}
3591	>
3592	>	/**
3593	>	* Returns the result of accumulating the given transformation
3594	>	* of all keys using the given reducer to combine values, or
3595	>	* null if none.
3596	>	*
3597	>	* @param transformer a function returning the transformation
3598	>	* for an element, or null of there is no transformation (in
3599	>	* which case it is not combined).
3600	>	* @param reducer a commutative associative combining function
3601	>	* @return the result of accumulating the given transformation
3602	>	* of all keys
3603	>	*/
3604	>	@SuppressWarnings("unchecked") public <U> U reduceKeysSequentially
3605	>	(Fun<? super K, ? extends U> transformer,
3606	>	BiFun<? super U, ? super U, ? extends U> reducer) {
3607	>	if (transformer == null || reducer == null)
3608	>	throw new NullPointerException();
3609	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3610	>	U r = null, u;
3611	>	while (it.advance() != null) {
3612	>	if ((u = transformer.apply((K)it.nextKey)) != null)
3613	>	r = (r == null) ? u : reducer.apply(r, u);
3614		}
3615	+	return r;
3616	+	}
3617
3618	<	/**
3619	<	* Returns a non-null result from applying the given search
3620	<	* function on each key, or null if none.  Further element
3621	<	* processing is suppressed upon success. However, this method
3622	<	* does not return until other in-progress parallel
3623	<	* invocations of the search function also complete.
3624	<	*
3625	<	* @param searchFunction a function returning a non-null
3626	<	* result on success, else null
3627	<	* @return a non-null result from applying the given search
3628	<	* function on each key, or null if none
3629	<	*/
3630	<	public <U> U searchKeys(Fun<? super K, ? extends U> searchFunction) {
3631	<	return fjp.invoke(ForkJoinTasks.searchKeys
3632	<	(ConcurrentHashMapV8.this, searchFunction));
3618	>	/**
3619	>	* Returns the result of accumulating the given transformation
3620	>	* of all keys using the given reducer to combine values, and
3621	>	* the given basis as an identity value.
3622	>	*
3623	>	* @param transformer a function returning the transformation
3624	>	* for an element
3625	>	* @param basis the identity (initial default value) for the reduction
3626	>	* @param reducer a commutative associative combining function
3627	>	* @return  the result of accumulating the given transformation
3628	>	* of all keys
3629	>	*/
3630	>	@SuppressWarnings("unchecked") public double reduceKeysToDoubleSequentially
3631	>	(ObjectToDouble<? super K> transformer,
3632	>	double basis,
3633	>	DoubleByDoubleToDouble reducer) {
3634	>	if (transformer == null || reducer == null)
3635	>	throw new NullPointerException();
3636	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3637	>	double r = basis;
3638	>	while (it.advance() != null)
3639	>	r = reducer.apply(r, transformer.apply((K)it.nextKey));
3640	>	return r;
3641	>	}
3642	>
3643	>	/**
3644	>	* Returns the result of accumulating the given transformation
3645	>	* of all keys using the given reducer to combine values, and
3646	>	* the given basis as an identity value.
3647	>	*
3648	>	* @param transformer a function returning the transformation
3649	>	* for an element
3650	>	* @param basis the identity (initial default value) for the reduction
3651	>	* @param reducer a commutative associative combining function
3652	>	* @return the result of accumulating the given transformation
3653	>	* of all keys
3654	>	*/
3655	>	@SuppressWarnings("unchecked") public long reduceKeysToLongSequentially
3656	>	(ObjectToLong<? super K> transformer,
3657	>	long basis,
3658	>	LongByLongToLong reducer) {
3659	>	if (transformer == null || reducer == null)
3660	>	throw new NullPointerException();
3661	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3662	>	long r = basis;
3663	>	while (it.advance() != null)
3664	>	r = reducer.apply(r, transformer.apply((K)it.nextKey));
3665	>	return r;
3666	>	}
3667	>
3668	>	/**
3669	>	* Returns the result of accumulating the given transformation
3670	>	* of all keys using the given reducer to combine values, and
3671	>	* the given basis as an identity value.
3672	>	*
3673	>	* @param transformer a function returning the transformation
3674	>	* for an element
3675	>	* @param basis the identity (initial default value) for the reduction
3676	>	* @param reducer a commutative associative combining function
3677	>	* @return the result of accumulating the given transformation
3678	>	* of all keys
3679	>	*/
3680	>	@SuppressWarnings("unchecked") public int reduceKeysToIntSequentially
3681	>	(ObjectToInt<? super K> transformer,
3682	>	int basis,
3683	>	IntByIntToInt reducer) {
3684	>	if (transformer == null || reducer == null)
3685	>	throw new NullPointerException();
3686	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3687	>	int r = basis;
3688	>	while (it.advance() != null)
3689	>	r = reducer.apply(r, transformer.apply((K)it.nextKey));
3690	>	return r;
3691	>	}
3692	>
3693	>	/**
3694	>	* Performs the given action for each value.
3695	>	*
3696	>	* @param action the action
3697	>	*/
3698	>	public void forEachValueSequentially(Action<V> action) {
3699	>	if (action == null) throw new NullPointerException();
3700	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3701	>	V v;
3702	>	while ((v = it.advance()) != null)
3703	>	action.apply(v);
3704	>	}
3705	>
3706	>	/**
3707	>	* Performs the given action for each non-null transformation
3708	>	* of each value.
3709	>	*
3710	>	* @param transformer a function returning the transformation
3711	>	* for an element, or null of there is no transformation (in
3712	>	* which case the action is not applied).
3713	>	*/
3714	>	public <U> void forEachValueSequentially
3715	>	(Fun<? super V, ? extends U> transformer,
3716	>	Action<U> action) {
3717	>	if (transformer == null || action == null)
3718	>	throw new NullPointerException();
3719	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3720	>	V v; U u;
3721	>	while ((v = it.advance()) != null) {
3722	>	if ((u = transformer.apply(v)) != null)
3723	>	action.apply(u);
3724		}
3725	+	}
3726
3727	<	/**
3728	<	* Returns the result of accumulating all keys using the given
3729	<	* reducer to combine values, or null if none.
3730	<	*
3731	<	* @param reducer a commutative associative combining function
3732	<	* @return the result of accumulating all keys using the given
3733	<	* reducer to combine values, or null if none
3734	<	*/
3735	<	public K reduceKeys(BiFun<? super K, ? super K, ? extends K> reducer) {
3736	<	return fjp.invoke(ForkJoinTasks.reduceKeys
3737	<	(ConcurrentHashMapV8.this, reducer));
3727	>	/**
3728	>	* Returns a non-null result from applying the given search
3729	>	* function on each value, or null if none.
3730	>	*
3731	>	* @param searchFunction a function returning a non-null
3732	>	* result on success, else null
3733	>	* @return a non-null result from applying the given search
3734	>	* function on each value, or null if none
3735	>	*/
3736	>	public <U> U searchValuesSequentially
3737	>	(Fun<? super V, ? extends U> searchFunction) {
3738	>	if (searchFunction == null) throw new NullPointerException();
3739	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3740	>	V v; U u;
3741	>	while ((v = it.advance()) != null) {
3742	>	if ((u = searchFunction.apply(v)) != null)
3743	>	return u;
3744		}
3745	+	return null;
3746	+	}
3747
3748	<	/**
3749	<	* Returns the result of accumulating the given transformation
3750	<	* of all keys using the given reducer to combine values, or
3751	<	* null if none.
3752	<	*
3753	<	* @param transformer a function returning the transformation
3754	<	* for an element, or null of there is no transformation (in
3755	<	* which case it is not combined).
3756	<	* @param reducer a commutative associative combining function
3757	<	* @return the result of accumulating the given transformation
3758	<	* of all keys
3759	<	*/
3760	<	public <U> U reduceKeys(Fun<? super K, ? extends U> transformer,
3761	<	BiFun<? super U, ? super U, ? extends U> reducer) {
3762	<	return fjp.invoke(ForkJoinTasks.reduceKeys
3763	<	(ConcurrentHashMapV8.this, transformer, reducer));
3748	>	/**
3749	>	* Returns the result of accumulating all values using the
3750	>	* given reducer to combine values, or null if none.
3751	>	*
3752	>	* @param reducer a commutative associative combining function
3753	>	* @return  the result of accumulating all values
3754	>	*/
3755	>	public V reduceValuesSequentially
3756	>	(BiFun<? super V, ? super V, ? extends V> reducer) {
3757	>	if (reducer == null) throw new NullPointerException();
3758	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3759	>	V r = null; V v;
3760	>	while ((v = it.advance()) != null)
3761	>	r = (r == null) ? v : reducer.apply(r, v);
3762	>	return r;
3763	>	}
3764	>
3765	>	/**
3766	>	* Returns the result of accumulating the given transformation
3767	>	* of all values using the given reducer to combine values, or
3768	>	* null if none.
3769	>	*
3770	>	* @param transformer a function returning the transformation
3771	>	* for an element, or null of there is no transformation (in
3772	>	* which case it is not combined).
3773	>	* @param reducer a commutative associative combining function
3774	>	* @return the result of accumulating the given transformation
3775	>	* of all values
3776	>	*/
3777	>	public <U> U reduceValuesSequentially
3778	>	(Fun<? super V, ? extends U> transformer,
3779	>	BiFun<? super U, ? super U, ? extends U> reducer) {
3780	>	if (transformer == null || reducer == null)
3781	>	throw new NullPointerException();
3782	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3783	>	U r = null, u; V v;
3784	>	while ((v = it.advance()) != null) {
3785	>	if ((u = transformer.apply(v)) != null)
3786	>	r = (r == null) ? u : reducer.apply(r, u);
3787		}
3788	+	return r;
3789	+	}
3790
3791	<	/**
3792	<	* Returns the result of accumulating the given transformation
3793	<	* of all keys using the given reducer to combine values, and
3794	<	* the given basis as an identity value.
3795	<	*
3796	<	* @param transformer a function returning the transformation
3797	<	* for an element
3798	<	* @param basis the identity (initial default value) for the reduction
3799	<	* @param reducer a commutative associative combining function
3800	<	* @return  the result of accumulating the given transformation
3801	<	* of all keys
3802	<	*/
3803	<	public double reduceKeysToDouble(ObjectToDouble<? super K> transformer,
3804	<	double basis,
3805	<	DoubleByDoubleToDouble reducer) {
3806	<	return fjp.invoke(ForkJoinTasks.reduceKeysToDouble
3807	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
3791	>	/**
3792	>	* Returns the result of accumulating the given transformation
3793	>	* of all values using the given reducer to combine values,
3794	>	* and the given basis as an identity value.
3795	>	*
3796	>	* @param transformer a function returning the transformation
3797	>	* for an element
3798	>	* @param basis the identity (initial default value) for the reduction
3799	>	* @param reducer a commutative associative combining function
3800	>	* @return the result of accumulating the given transformation
3801	>	* of all values
3802	>	*/
3803	>	public double reduceValuesToDoubleSequentially
3804	>	(ObjectToDouble<? super V> transformer,
3805	>	double basis,
3806	>	DoubleByDoubleToDouble reducer) {
3807	>	if (transformer == null || reducer == null)
3808	>	throw new NullPointerException();
3809	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3810	>	double r = basis; V v;
3811	>	while ((v = it.advance()) != null)
3812	>	r = reducer.apply(r, transformer.apply(v));
3813	>	return r;
3814	>	}
3815	>
3816	>	/**
3817	>	* Returns the result of accumulating the given transformation
3818	>	* of all values using the given reducer to combine values,
3819	>	* and the given basis as an identity value.
3820	>	*
3821	>	* @param transformer a function returning the transformation
3822	>	* for an element
3823	>	* @param basis the identity (initial default value) for the reduction
3824	>	* @param reducer a commutative associative combining function
3825	>	* @return the result of accumulating the given transformation
3826	>	* of all values
3827	>	*/
3828	>	public long reduceValuesToLongSequentially
3829	>	(ObjectToLong<? super V> transformer,
3830	>	long basis,
3831	>	LongByLongToLong reducer) {
3832	>	if (transformer == null || reducer == null)
3833	>	throw new NullPointerException();
3834	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3835	>	long r = basis; V v;
3836	>	while ((v = it.advance()) != null)
3837	>	r = reducer.apply(r, transformer.apply(v));
3838	>	return r;
3839	>	}
3840	>
3841	>	/**
3842	>	* Returns the result of accumulating the given transformation
3843	>	* of all values using the given reducer to combine values,
3844	>	* and the given basis as an identity value.
3845	>	*
3846	>	* @param transformer a function returning the transformation
3847	>	* for an element
3848	>	* @param basis the identity (initial default value) for the reduction
3849	>	* @param reducer a commutative associative combining function
3850	>	* @return the result of accumulating the given transformation
3851	>	* of all values
3852	>	*/
3853	>	public int reduceValuesToIntSequentially
3854	>	(ObjectToInt<? super V> transformer,
3855	>	int basis,
3856	>	IntByIntToInt reducer) {
3857	>	if (transformer == null || reducer == null)
3858	>	throw new NullPointerException();
3859	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3860	>	int r = basis; V v;
3861	>	while ((v = it.advance()) != null)
3862	>	r = reducer.apply(r, transformer.apply(v));
3863	>	return r;
3864	>	}
3865	>
3866	>	/**
3867	>	* Performs the given action for each entry.
3868	>	*
3869	>	* @param action the action
3870	>	*/
3871	>	@SuppressWarnings("unchecked") public void forEachEntrySequentially
3872	>	(Action<Map.Entry<K,V>> action) {
3873	>	if (action == null) throw new NullPointerException();
3874	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3875	>	V v;
3876	>	while ((v = it.advance()) != null)
3877	>	action.apply(entryFor((K)it.nextKey, v));
3878	>	}
3879	>
3880	>	/**
3881	>	* Performs the given action for each non-null transformation
3882	>	* of each entry.
3883	>	*
3884	>	* @param transformer a function returning the transformation
3885	>	* for an element, or null of there is no transformation (in
3886	>	* which case the action is not applied).
3887	>	* @param action the action
3888	>	*/
3889	>	@SuppressWarnings("unchecked") public <U> void forEachEntrySequentially
3890	>	(Fun<Map.Entry<K,V>, ? extends U> transformer,
3891	>	Action<U> action) {
3892	>	if (transformer == null || action == null)
3893	>	throw new NullPointerException();
3894	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3895	>	V v; U u;
3896	>	while ((v = it.advance()) != null) {
3897	>	if ((u = transformer.apply(entryFor((K)it.nextKey, v))) != null)
3898	>	action.apply(u);
3899		}
3900	+	}
3901
3902	<	/**
3903	<	* Returns the result of accumulating the given transformation
3904	<	* of all keys using the given reducer to combine values, and
3905	<	* the given basis as an identity value.
3906	<	*
3907	<	* @param transformer a function returning the transformation
3908	<	* for an element
3909	<	* @param basis the identity (initial default value) for the reduction
3910	<	* @param reducer a commutative associative combining function
3911	<	* @return the result of accumulating the given transformation
3912	<	* of all keys
3913	<	*/
3914	<	public long reduceKeysToLong(ObjectToLong<? super K> transformer,
3915	<	long basis,
3916	<	LongByLongToLong reducer) {
3917	<	return fjp.invoke(ForkJoinTasks.reduceKeysToLong
3918	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
3902	>	/**
3903	>	* Returns a non-null result from applying the given search
3904	>	* function on each entry, or null if none.
3905	>	*
3906	>	* @param searchFunction a function returning a non-null
3907	>	* result on success, else null
3908	>	* @return a non-null result from applying the given search
3909	>	* function on each entry, or null if none
3910	>	*/
3911	>	@SuppressWarnings("unchecked") public <U> U searchEntriesSequentially
3912	>	(Fun<Map.Entry<K,V>, ? extends U> searchFunction) {
3913	>	if (searchFunction == null) throw new NullPointerException();
3914	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3915	>	V v; U u;
3916	>	while ((v = it.advance()) != null) {
3917	>	if ((u = searchFunction.apply(entryFor((K)it.nextKey, v))) != null)
3918	>	return u;
3919		}
3920	+	return null;
3921	+	}
3922
3923	<	/**
3924	<	* Returns the result of accumulating the given transformation
3925	<	* of all keys using the given reducer to combine values, and
3926	<	* the given basis as an identity value.
3927	<	*
3928	<	* @param transformer a function returning the transformation
3929	<	* for an element
3930	<	* @param basis the identity (initial default value) for the reduction
3931	<	* @param reducer a commutative associative combining function
3932	<	* @return the result of accumulating the given transformation
3933	<	* of all keys
3934	<	*/
3935	<	public int reduceKeysToInt(ObjectToInt<? super K> transformer,
3936	<	int basis,
3937	<	IntByIntToInt reducer) {
3876	<	return fjp.invoke(ForkJoinTasks.reduceKeysToInt
3877	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
3923	>	/**
3924	>	* Returns the result of accumulating all entries using the
3925	>	* given reducer to combine values, or null if none.
3926	>	*
3927	>	* @param reducer a commutative associative combining function
3928	>	* @return the result of accumulating all entries
3929	>	*/
3930	>	@SuppressWarnings("unchecked") public Map.Entry<K,V> reduceEntriesSequentially
3931	>	(BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
3932	>	if (reducer == null) throw new NullPointerException();
3933	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3934	>	Map.Entry<K,V> r = null; V v;
3935	>	while ((v = it.advance()) != null) {
3936	>	Map.Entry<K,V> u = entryFor((K)it.nextKey, v);
3937	>	r = (r == null) ? u : reducer.apply(r, u);
3938		}
3939	+	return r;
3940	+	}
3941
3942	<	/**
3943	<	* Performs the given action for each value.
3944	<	*
3945	<	* @param action the action
3946	<	*/
3947	<	public void forEachValue(Action<V> action) {
3948	<	fjp.invoke(ForkJoinTasks.forEachValue
3949	<	(ConcurrentHashMapV8.this, action));
3942	>	/**
3943	>	* Returns the result of accumulating the given transformation
3944	>	* of all entries using the given reducer to combine values,
3945	>	* or null if none.
3946	>	*
3947	>	* @param transformer a function returning the transformation
3948	>	* for an element, or null of there is no transformation (in
3949	>	* which case it is not combined).
3950	>	* @param reducer a commutative associative combining function
3951	>	* @return the result of accumulating the given transformation
3952	>	* of all entries
3953	>	*/
3954	>	@SuppressWarnings("unchecked") public <U> U reduceEntriesSequentially
3955	>	(Fun<Map.Entry<K,V>, ? extends U> transformer,
3956	>	BiFun<? super U, ? super U, ? extends U> reducer) {
3957	>	if (transformer == null || reducer == null)
3958	>	throw new NullPointerException();
3959	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3960	>	U r = null, u; V v;
3961	>	while ((v = it.advance()) != null) {
3962	>	if ((u = transformer.apply(entryFor((K)it.nextKey, v))) != null)
3963	>	r = (r == null) ? u : reducer.apply(r, u);
3964		}
3965	+	return r;
3966	+	}
3967	+
3968	+	/**
3969	+	* Returns the result of accumulating the given transformation
3970	+	* of all entries using the given reducer to combine values,
3971	+	* and the given basis as an identity value.
3972	+	*
3973	+	* @param transformer a function returning the transformation
3974	+	* for an element
3975	+	* @param basis the identity (initial default value) for the reduction
3976	+	* @param reducer a commutative associative combining function
3977	+	* @return the result of accumulating the given transformation
3978	+	* of all entries
3979	+	*/
3980	+	@SuppressWarnings("unchecked") public double reduceEntriesToDoubleSequentially
3981	+	(ObjectToDouble<Map.Entry<K,V>> transformer,
3982	+	double basis,
3983	+	DoubleByDoubleToDouble reducer) {
3984	+	if (transformer == null || reducer == null)
3985	+	throw new NullPointerException();
3986	+	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3987	+	double r = basis; V v;
3988	+	while ((v = it.advance()) != null)
3989	+	r = reducer.apply(r, transformer.apply(entryFor((K)it.nextKey, v)));
3990	+	return r;
3991	+	}
3992	+
3993	+	/**
3994	+	* Returns the result of accumulating the given transformation
3995	+	* of all entries using the given reducer to combine values,
3996	+	* and the given basis as an identity value.
3997	+	*
3998	+	* @param transformer a function returning the transformation
3999	+	* for an element
4000	+	* @param basis the identity (initial default value) for the reduction
4001	+	* @param reducer a commutative associative combining function
4002	+	* @return  the result of accumulating the given transformation
4003	+	* of all entries
4004	+	*/
4005	+	@SuppressWarnings("unchecked") public long reduceEntriesToLongSequentially
4006	+	(ObjectToLong<Map.Entry<K,V>> transformer,
4007	+	long basis,
4008	+	LongByLongToLong reducer) {
4009	+	if (transformer == null || reducer == null)
4010	+	throw new NullPointerException();
4011	+	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
4012	+	long r = basis; V v;
4013	+	while ((v = it.advance()) != null)
4014	+	r = reducer.apply(r, transformer.apply(entryFor((K)it.nextKey, v)));
4015	+	return r;
4016	+	}
4017	+
4018	+	/**
4019	+	* Returns the result of accumulating the given transformation
4020	+	* of all entries using the given reducer to combine values,
4021	+	* and the given basis as an identity value.
4022	+	*
4023	+	* @param transformer a function returning the transformation
4024	+	* for an element
4025	+	* @param basis the identity (initial default value) for the reduction
4026	+	* @param reducer a commutative associative combining function
4027	+	* @return the result of accumulating the given transformation
4028	+	* of all entries
4029	+	*/
4030	+	@SuppressWarnings("unchecked") public int reduceEntriesToIntSequentially
4031	+	(ObjectToInt<Map.Entry<K,V>> transformer,
4032	+	int basis,
4033	+	IntByIntToInt reducer) {
4034	+	if (transformer == null || reducer == null)
4035	+	throw new NullPointerException();
4036	+	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
4037	+	int r = basis; V v;
4038	+	while ((v = it.advance()) != null)
4039	+	r = reducer.apply(r, transformer.apply(entryFor((K)it.nextKey, v)));
4040	+	return r;
4041	+	}
4042	+
4043	+	// Parallel bulk operations
4044	+
4045	+	/**
4046	+	* Performs the given action for each (key, value).
4047	+	*
4048	+	* @param action the action
4049	+	*/
4050	+	public void forEachInParallel(BiAction<K,V> action) {
4051	+	ForkJoinTasks.forEach
4052	+	(this, action).invoke();
4053	+	}
4054	+
4055	+	/**
4056	+	* Performs the given action for each non-null transformation
4057	+	* of each (key, value).
4058	+	*
4059	+	* @param transformer a function returning the transformation
4060	+	* for an element, or null of there is no transformation (in
4061	+	* which case the action is not applied).
4062	+	* @param action the action
4063	+	*/
4064	+	public <U> void forEachInParallel
4065	+	(BiFun<? super K, ? super V, ? extends U> transformer,
4066	+	Action<U> action) {
4067	+	ForkJoinTasks.forEach
4068	+	(this, transformer, action).invoke();
4069	+	}
4070	+
4071	+	/**
4072	+	* Returns a non-null result from applying the given search
4073	+	* function on each (key, value), or null if none.  Upon
4074	+	* success, further element processing is suppressed and the
4075	+	* results of any other parallel invocations of the search
4076	+	* function are ignored.
4077	+	*
4078	+	* @param searchFunction a function returning a non-null
4079	+	* result on success, else null
4080	+	* @return a non-null result from applying the given search
4081	+	* function on each (key, value), or null if none
4082	+	*/
4083	+	public <U> U searchInParallel
4084	+	(BiFun<? super K, ? super V, ? extends U> searchFunction) {
4085	+	return ForkJoinTasks.search
4086	+	(this, searchFunction).invoke();
4087	+	}
4088	+
4089	+	/**
4090	+	* Returns the result of accumulating the given transformation
4091	+	* of all (key, value) pairs using the given reducer to
4092	+	* combine values, or null if none.
4093	+	*
4094	+	* @param transformer a function returning the transformation
4095	+	* for an element, or null of there is no transformation (in
4096	+	* which case it is not combined).
4097	+	* @param reducer a commutative associative combining function
4098	+	* @return the result of accumulating the given transformation
4099	+	* of all (key, value) pairs
4100	+	*/
4101	+	public <U> U reduceInParallel
4102	+	(BiFun<? super K, ? super V, ? extends U> transformer,
4103	+	BiFun<? super U, ? super U, ? extends U> reducer) {
4104	+	return ForkJoinTasks.reduce
4105	+	(this, transformer, reducer).invoke();
4106	+	}
4107	+
4108	+	/**
4109	+	* Returns the result of accumulating the given transformation
4110	+	* of all (key, value) pairs using the given reducer to
4111	+	* combine values, and the given basis as an identity value.
4112	+	*
4113	+	* @param transformer a function returning the transformation
4114	+	* for an element
4115	+	* @param basis the identity (initial default value) for the reduction
4116	+	* @param reducer a commutative associative combining function
4117	+	* @return the result of accumulating the given transformation
4118	+	* of all (key, value) pairs
4119	+	*/
4120	+	public double reduceToDoubleInParallel
4121	+	(ObjectByObjectToDouble<? super K, ? super V> transformer,
4122	+	double basis,
4123	+	DoubleByDoubleToDouble reducer) {
4124	+	return ForkJoinTasks.reduceToDouble
4125	+	(this, transformer, basis, reducer).invoke();
4126	+	}
4127	+
4128	+	/**
4129	+	* Returns the result of accumulating the given transformation
4130	+	* of all (key, value) pairs using the given reducer to
4131	+	* combine values, and the given basis as an identity value.
4132	+	*
4133	+	* @param transformer a function returning the transformation
4134	+	* for an element
4135	+	* @param basis the identity (initial default value) for the reduction
4136	+	* @param reducer a commutative associative combining function
4137	+	* @return the result of accumulating the given transformation
4138	+	* of all (key, value) pairs
4139	+	*/
4140	+	public long reduceToLongInParallel
4141	+	(ObjectByObjectToLong<? super K, ? super V> transformer,
4142	+	long basis,
4143	+	LongByLongToLong reducer) {
4144	+	return ForkJoinTasks.reduceToLong
4145	+	(this, transformer, basis, reducer).invoke();
4146	+	}
4147	+
4148	+	/**
4149	+	* Returns the result of accumulating the given transformation
4150	+	* of all (key, value) pairs using the given reducer to
4151	+	* combine values, and the given basis as an identity value.
4152	+	*
4153	+	* @param transformer a function returning the transformation
4154	+	* for an element
4155	+	* @param basis the identity (initial default value) for the reduction
4156	+	* @param reducer a commutative associative combining function
4157	+	* @return the result of accumulating the given transformation
4158	+	* of all (key, value) pairs
4159	+	*/
4160	+	public int reduceToIntInParallel
4161	+	(ObjectByObjectToInt<? super K, ? super V> transformer,
4162	+	int basis,
4163	+	IntByIntToInt reducer) {
4164	+	return ForkJoinTasks.reduceToInt
4165	+	(this, transformer, basis, reducer).invoke();
4166	+	}
4167	+
4168	+	/**
4169	+	* Performs the given action for each key.
4170	+	*
4171	+	* @param action the action
4172	+	*/
4173	+	public void forEachKeyInParallel(Action<K> action) {
4174	+	ForkJoinTasks.forEachKey
4175	+	(this, action).invoke();
4176	+	}
4177	+
4178	+	/**
4179	+	* Performs the given action for each non-null transformation
4180	+	* of each key.
4181	+	*
4182	+	* @param transformer a function returning the transformation
4183	+	* for an element, or null of there is no transformation (in
4184	+	* which case the action is not applied).
4185	+	* @param action the action
4186	+	*/
4187	+	public <U> void forEachKeyInParallel
4188	+	(Fun<? super K, ? extends U> transformer,
4189	+	Action<U> action) {
4190	+	ForkJoinTasks.forEachKey
4191	+	(this, transformer, action).invoke();
4192	+	}
4193	+
4194	+	/**
4195	+	* Returns a non-null result from applying the given search
4196	+	* function on each key, 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 searchFunction a function returning a non-null
4202	+	* result on success, else null
4203	+	* @return a non-null result from applying the given search
4204	+	* function on each key, or null if none
4205	+	*/
4206	+	public <U> U searchKeysInParallel
4207	+	(Fun<? super K, ? extends U> searchFunction) {
4208	+	return ForkJoinTasks.searchKeys
4209	+	(this, searchFunction).invoke();
4210	+	}
4211	+
4212	+	/**
4213	+	* Returns the result of accumulating all keys using the given
4214	+	* reducer to combine values, or null if none.
4215	+	*
4216	+	* @param reducer a commutative associative combining function
4217	+	* @return the result of accumulating all keys using the given
4218	+	* reducer to combine values, or null if none
4219	+	*/
4220	+	public K reduceKeysInParallel
4221	+	(BiFun<? super K, ? super K, ? extends K> reducer) {
4222	+	return ForkJoinTasks.reduceKeys
4223	+	(this, reducer).invoke();
4224	+	}
4225	+
4226	+	/**
4227	+	* Returns the result of accumulating the given transformation
4228	+	* of all keys using the given reducer to combine values, or
4229	+	* null if none.
4230	+	*
4231	+	* @param transformer a function returning the transformation
4232	+	* for an element, or null of there is no transformation (in
4233	+	* which case it is not combined).
4234	+	* @param reducer a commutative associative combining function
4235	+	* @return the result of accumulating the given transformation
4236	+	* of all keys
4237	+	*/
4238	+	public <U> U reduceKeysInParallel
4239	+	(Fun<? super K, ? extends U> transformer,
4240	+	BiFun<? super U, ? super U, ? extends U> reducer) {
4241	+	return ForkJoinTasks.reduceKeys
4242	+	(this, transformer, reducer).invoke();
4243	+	}
4244	+
4245	+	/**
4246	+	* Returns the result of accumulating the given transformation
4247	+	* of all keys using the given reducer to combine values, and
4248	+	* the given basis as an identity value.
4249	+	*
4250	+	* @param transformer a function returning the transformation
4251	+	* for an element
4252	+	* @param basis the identity (initial default value) for the reduction
4253	+	* @param reducer a commutative associative combining function
4254	+	* @return  the result of accumulating the given transformation
4255	+	* of all keys
4256	+	*/
4257	+	public double reduceKeysToDoubleInParallel
4258	+	(ObjectToDouble<? super K> transformer,
4259	+	double basis,
4260	+	DoubleByDoubleToDouble reducer) {
4261	+	return ForkJoinTasks.reduceKeysToDouble
4262	+	(this, transformer, basis, reducer).invoke();
4263	+	}
4264	+
4265	+	/**
4266	+	* Returns the result of accumulating the given transformation
4267	+	* of all keys using the given reducer to combine values, and
4268	+	* the given basis as an identity value.
4269	+	*
4270	+	* @param transformer a function returning the transformation
4271	+	* for an element
4272	+	* @param basis the identity (initial default value) for the reduction
4273	+	* @param reducer a commutative associative combining function
4274	+	* @return the result of accumulating the given transformation
4275	+	* of all keys
4276	+	*/
4277	+	public long reduceKeysToLongInParallel
4278	+	(ObjectToLong<? super K> transformer,
4279	+	long basis,
4280	+	LongByLongToLong reducer) {
4281	+	return ForkJoinTasks.reduceKeysToLong
4282	+	(this, transformer, basis, reducer).invoke();
4283	+	}
4284	+
4285	+	/**
4286	+	* Returns the result of accumulating the given transformation
4287	+	* of all keys using the given reducer to combine values, and
4288	+	* the given basis as an identity value.
4289	+	*
4290	+	* @param transformer a function returning the transformation
4291	+	* for an element
4292	+	* @param basis the identity (initial default value) for the reduction
4293	+	* @param reducer a commutative associative combining function
4294	+	* @return the result of accumulating the given transformation
4295	+	* of all keys
4296	+	*/
4297	+	public int reduceKeysToIntInParallel
4298	+	(ObjectToInt<? super K> transformer,
4299	+	int basis,
4300	+	IntByIntToInt reducer) {
4301	+	return ForkJoinTasks.reduceKeysToInt
4302	+	(this, transformer, basis, reducer).invoke();
4303	+	}
4304	+
4305	+	/**
4306	+	* Performs the given action for each value.
4307	+	*
4308	+	* @param action the action
4309	+	*/
4310	+	public void forEachValueInParallel(Action<V> action) {
4311	+	ForkJoinTasks.forEachValue
4312	+	(this, action).invoke();
4313	+	}
4314	+
4315	+	/**
4316	+	* Performs the given action for each non-null transformation
4317	+	* of each value.
4318	+	*
4319	+	* @param transformer a function returning the transformation
4320	+	* for an element, or null of there is no transformation (in
4321	+	* which case the action is not applied).
4322	+	*/
4323	+	public <U> void forEachValueInParallel
4324	+	(Fun<? super V, ? extends U> transformer,
4325	+	Action<U> action) {
4326	+	ForkJoinTasks.forEachValue
4327	+	(this, transformer, action).invoke();
4328	+	}
4329	+
4330	+	/**
4331	+	* Returns a non-null result from applying the given search
4332	+	* function on each value, or null if none.  Upon success,
4333	+	* further element processing is suppressed and the results of
4334	+	* any other parallel invocations of the search function are
4335	+	* ignored.
4336	+	*
4337	+	* @param searchFunction a function returning a non-null
4338	+	* result on success, else null
4339	+	* @return a non-null result from applying the given search
4340	+	* function on each value, or null if none
4341	+	*/
4342	+	public <U> U searchValuesInParallel
4343	+	(Fun<? super V, ? extends U> searchFunction) {
4344	+	return ForkJoinTasks.searchValues
4345	+	(this, searchFunction).invoke();
4346	+	}
4347	+
4348	+	/**
4349	+	* Returns the result of accumulating all values using the
4350	+	* given reducer to combine values, or null if none.
4351	+	*
4352	+	* @param reducer a commutative associative combining function
4353	+	* @return  the result of accumulating all values
4354	+	*/
4355	+	public V reduceValuesInParallel
4356	+	(BiFun<? super V, ? super V, ? extends V> reducer) {
4357	+	return ForkJoinTasks.reduceValues
4358	+	(this, reducer).invoke();
4359	+	}
4360	+
4361	+	/**
4362	+	* Returns the result of accumulating the given transformation
4363	+	* of all values using the given reducer to combine values, or
4364	+	* null if none.
4365	+	*
4366	+	* @param transformer a function returning the transformation
4367	+	* for an element, or null of there is no transformation (in
4368	+	* which case it is not combined).
4369	+	* @param reducer a commutative associative combining function
4370	+	* @return the result of accumulating the given transformation
4371	+	* of all values
4372	+	*/
4373	+	public <U> U reduceValuesInParallel
4374	+	(Fun<? super V, ? extends U> transformer,
4375	+	BiFun<? super U, ? super U, ? extends U> reducer) {
4376	+	return ForkJoinTasks.reduceValues
4377	+	(this, transformer, reducer).invoke();
4378	+	}
4379	+
4380	+	/**
4381	+	* Returns the result of accumulating the given transformation
4382	+	* of all values using the given reducer to combine values,
4383	+	* and the given basis as an identity value.
4384	+	*
4385	+	* @param transformer a function returning the transformation
4386	+	* for an element
4387	+	* @param basis the identity (initial default value) for the reduction
4388	+	* @param reducer a commutative associative combining function
4389	+	* @return the result of accumulating the given transformation
4390	+	* of all values
4391	+	*/
4392	+	public double reduceValuesToDoubleInParallel
4393	+	(ObjectToDouble<? super V> transformer,
4394	+	double basis,
4395	+	DoubleByDoubleToDouble reducer) {
4396	+	return ForkJoinTasks.reduceValuesToDouble
4397	+	(this, transformer, basis, reducer).invoke();
4398	+	}
4399	+
4400	+	/**
4401	+	* Returns the result of accumulating the given transformation
4402	+	* of all values using the given reducer to combine values,
4403	+	* and the given basis as an identity value.
4404	+	*
4405	+	* @param transformer a function returning the transformation
4406	+	* for an element
4407	+	* @param basis the identity (initial default value) for the reduction
4408	+	* @param reducer a commutative associative combining function
4409	+	* @return the result of accumulating the given transformation
4410	+	* of all values
4411	+	*/
4412	+	public long reduceValuesToLongInParallel
4413	+	(ObjectToLong<? super V> transformer,
4414	+	long basis,
4415	+	LongByLongToLong reducer) {
4416	+	return ForkJoinTasks.reduceValuesToLong
4417	+	(this, transformer, basis, reducer).invoke();
4418	+	}
4419	+
4420	+	/**
4421	+	* Returns the result of accumulating the given transformation
4422	+	* of all values using the given reducer to combine values,
4423	+	* and the given basis as an identity value.
4424	+	*
4425	+	* @param transformer a function returning the transformation
4426	+	* for an element
4427	+	* @param basis the identity (initial default value) for the reduction
4428	+	* @param reducer a commutative associative combining function
4429	+	* @return the result of accumulating the given transformation
4430	+	* of all values
4431	+	*/
4432	+	public int reduceValuesToIntInParallel
4433	+	(ObjectToInt<? super V> transformer,
4434	+	int basis,
4435	+	IntByIntToInt reducer) {
4436	+	return ForkJoinTasks.reduceValuesToInt
4437	+	(this, transformer, basis, reducer).invoke();
4438	+	}
4439	+
4440	+	/**
4441	+	* Performs the given action for each entry.
4442	+	*
4443	+	* @param action the action
4444	+	*/
4445	+	public void forEachEntryInParallel(Action<Map.Entry<K,V>> action) {
4446	+	ForkJoinTasks.forEachEntry
4447	+	(this, action).invoke();
4448	+	}
4449	+
4450	+	/**
4451	+	* Performs the given action for each non-null transformation
4452	+	* of each entry.
4453	+	*
4454	+	* @param transformer a function returning the transformation
4455	+	* for an element, or null of there is no transformation (in
4456	+	* which case the action is not applied).
4457	+	* @param action the action
4458	+	*/
4459	+	public <U> void forEachEntryInParallel
4460	+	(Fun<Map.Entry<K,V>, ? extends U> transformer,
4461	+	Action<U> action) {
4462	+	ForkJoinTasks.forEachEntry
4463	+	(this, transformer, action).invoke();
4464	+	}
4465	+
4466	+	/**
4467	+	* Returns a non-null result from applying the given search
4468	+	* function on each entry, or null if none.  Upon success,
4469	+	* further element processing is suppressed and the results of
4470	+	* any other parallel invocations of the search function are
4471	+	* ignored.
4472	+	*
4473	+	* @param searchFunction a function returning a non-null
4474	+	* result on success, else null
4475	+	* @return a non-null result from applying the given search
4476	+	* function on each entry, or null if none
4477	+	*/
4478	+	public <U> U searchEntriesInParallel
4479	+	(Fun<Map.Entry<K,V>, ? extends U> searchFunction) {
4480	+	return ForkJoinTasks.searchEntries
4481	+	(this, searchFunction).invoke();
4482	+	}
4483	+
4484	+	/**
4485	+	* Returns the result of accumulating all entries using the
4486	+	* given reducer to combine values, or null if none.
4487	+	*
4488	+	* @param reducer a commutative associative combining function
4489	+	* @return the result of accumulating all entries
4490	+	*/
4491	+	public Map.Entry<K,V> reduceEntriesInParallel
4492	+	(BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
4493	+	return ForkJoinTasks.reduceEntries
4494	+	(this, reducer).invoke();
4495	+	}
4496	+
4497	+	/**
4498	+	* Returns the result of accumulating the given transformation
4499	+	* of all entries using the given reducer to combine values,
4500	+	* or null if none.
4501	+	*
4502	+	* @param transformer a function returning the transformation
4503	+	* for an element, or null of there is no transformation (in
4504	+	* which case it is not combined).
4505	+	* @param reducer a commutative associative combining function
4506	+	* @return the result of accumulating the given transformation
4507	+	* of all entries
4508	+	*/
4509	+	public <U> U reduceEntriesInParallel
4510	+	(Fun<Map.Entry<K,V>, ? extends U> transformer,
4511	+	BiFun<? super U, ? super U, ? extends U> reducer) {
4512	+	return ForkJoinTasks.reduceEntries
4513	+	(this, transformer, reducer).invoke();
4514	+	}
4515	+
4516	+	/**
4517	+	* Returns the result of accumulating the given transformation
4518	+	* of all entries using the given reducer to combine values,
4519	+	* and the given basis as an identity value.
4520	+	*
4521	+	* @param transformer a function returning the transformation
4522	+	* for an element
4523	+	* @param basis the identity (initial default value) for the reduction
4524	+	* @param reducer a commutative associative combining function
4525	+	* @return the result of accumulating the given transformation
4526	+	* of all entries
4527	+	*/
4528	+	public double reduceEntriesToDoubleInParallel
4529	+	(ObjectToDouble<Map.Entry<K,V>> transformer,
4530	+	double basis,
4531	+	DoubleByDoubleToDouble reducer) {
4532	+	return ForkJoinTasks.reduceEntriesToDouble
4533	+	(this, transformer, basis, reducer).invoke();
4534	+	}
4535	+
4536	+	/**
4537	+	* Returns the result of accumulating the given transformation
4538	+	* of all entries using the given reducer to combine values,
4539	+	* and the given basis as an identity value.
4540	+	*
4541	+	* @param transformer a function returning the transformation
4542	+	* for an element
4543	+	* @param basis the identity (initial default value) for the reduction
4544	+	* @param reducer a commutative associative combining function
4545	+	* @return  the result of accumulating the given transformation
4546	+	* of all entries
4547	+	*/
4548	+	public long reduceEntriesToLongInParallel
4549	+	(ObjectToLong<Map.Entry<K,V>> transformer,
4550	+	long basis,
4551	+	LongByLongToLong reducer) {
4552	+	return ForkJoinTasks.reduceEntriesToLong
4553	+	(this, transformer, basis, reducer).invoke();
4554	+	}
4555	+
4556	+	/**
4557	+	* Returns the result of accumulating the given transformation
4558	+	* of all entries using the given reducer to combine values,
4559	+	* and the given basis as an identity value.
4560	+	*
4561	+	* @param transformer a function returning the transformation
4562	+	* for an element
4563	+	* @param basis the identity (initial default value) for the reduction
4564	+	* @param reducer a commutative associative combining function
4565	+	* @return the result of accumulating the given transformation
4566	+	* of all entries
4567	+	*/
4568	+	public int reduceEntriesToIntInParallel
4569	+	(ObjectToInt<Map.Entry<K,V>> transformer,
4570	+	int basis,
4571	+	IntByIntToInt reducer) {
4572	+	return ForkJoinTasks.reduceEntriesToInt
4573	+	(this, transformer, basis, reducer).invoke();
4574	+	}
4575	+
4576	+
4577	+	/* ----------------Views -------------- */
4578	+
4579	+	/**
4580	+	* Base class for views.
4581	+	*/
4582	+	abstract static class CHMView<K, V> {
4583	+	final ConcurrentHashMapV8<K, V> map;
4584	+	CHMView(ConcurrentHashMapV8<K, V> map)  { this.map = map; }
4585
4586		/**
4587	<	* Performs the given action for each non-null transformation
3892	<	* of each value.
4587	>	* Returns the map backing this view.
4588		*
4589	<	* @param transformer a function returning the transformation
3895	<	* for an element, or null of there is no transformation (in
3896	<	* which case the action is not applied).
4589	>	* @return the map backing this view
4590		*/
4591	<	public <U> void forEachValue(Fun<? super V, ? extends U> transformer,
4592	<	Action<U> action) {
4593	<	fjp.invoke(ForkJoinTasks.forEachValue
4594	<	(ConcurrentHashMapV8.this, transformer, action));
4591	>	public ConcurrentHashMapV8<K,V> getMap() { return map; }
4592	>
4593	>	public final int size()                 { return map.size(); }
4594	>	public final boolean isEmpty()          { return map.isEmpty(); }
4595	>	public final void clear()               { map.clear(); }
4596	>
4597	>	// implementations below rely on concrete classes supplying these
4598	>	public abstract Iterator<?> iterator();
4599	>	public abstract boolean contains(Object o);
4600	>	public abstract boolean remove(Object o);
4601	>
4602	>	private static final String oomeMsg = "Required array size too large";
4603	>
4604	>	public final Object[] toArray() {
4605	>	long sz = map.mappingCount();
4606	>	if (sz > (long)(MAX_ARRAY_SIZE))
4607	>	throw new OutOfMemoryError(oomeMsg);
4608	>	int n = (int)sz;
4609	>	Object[] r = new Object[n];
4610	>	int i = 0;
4611	>	Iterator<?> it = iterator();
4612	>	while (it.hasNext()) {
4613	>	if (i == n) {
4614	>	if (n >= MAX_ARRAY_SIZE)
4615	>	throw new OutOfMemoryError(oomeMsg);
4616	>	if (n >= MAX_ARRAY_SIZE - (MAX_ARRAY_SIZE >>> 1) - 1)
4617	>	n = MAX_ARRAY_SIZE;
4618	>	else
4619	>	n += (n >>> 1) + 1;
4620	>	r = Arrays.copyOf(r, n);
4621	>	}
4622	>	r[i++] = it.next();
4623	>	}
4624	>	return (i == n) ? r : Arrays.copyOf(r, i);
4625		}
4626
4627	<	/**
4628	<	* Returns a non-null result from applying the given search
4629	<	* function on each value, or null if none.  Further element
4630	<	* processing is suppressed upon success. However, this method
4631	<	* does not return until other in-progress parallel
4632	<	* invocations of the search function also complete.
4633	<	*
4634	<	* @param searchFunction a function returning a non-null
4635	<	* result on success, else null
4636	<	* @return a non-null result from applying the given search
4637	<	* function on each value, or null if none
4638	<	*
4639	<	*/
4640	<	public <U> U searchValues(Fun<? super V, ? extends U> searchFunction) {
4641	<	return fjp.invoke(ForkJoinTasks.searchValues
4642	<	(ConcurrentHashMapV8.this, searchFunction));
4627	>	@SuppressWarnings("unchecked") public final <T> T[] toArray(T[] a) {
4628	>	long sz = map.mappingCount();
4629	>	if (sz > (long)(MAX_ARRAY_SIZE))
4630	>	throw new OutOfMemoryError(oomeMsg);
4631	>	int m = (int)sz;
4632	>	T[] r = (a.length >= m) ? a :
4633	>	(T[])java.lang.reflect.Array
4634	>	.newInstance(a.getClass().getComponentType(), m);
4635	>	int n = r.length;
4636	>	int i = 0;
4637	>	Iterator<?> it = iterator();
4638	>	while (it.hasNext()) {
4639	>	if (i == n) {
4640	>	if (n >= MAX_ARRAY_SIZE)
4641	>	throw new OutOfMemoryError(oomeMsg);
4642	>	if (n >= MAX_ARRAY_SIZE - (MAX_ARRAY_SIZE >>> 1) - 1)
4643	>	n = MAX_ARRAY_SIZE;
4644	>	else
4645	>	n += (n >>> 1) + 1;
4646	>	r = Arrays.copyOf(r, n);
4647	>	}
4648	>	r[i++] = (T)it.next();
4649	>	}
4650	>	if (a == r && i < n) {
4651	>	r[i] = null; // null-terminate
4652	>	return r;
4653	>	}
4654	>	return (i == n) ? r : Arrays.copyOf(r, i);
4655		}
4656
4657	<	/**
4658	<	* Returns the result of accumulating all values using the
4659	<	* given reducer to combine values, or null if none.
4660	<	*
4661	<	* @param reducer a commutative associative combining function
3927	<	* @return  the result of accumulating all values
3928	<	*/
3929	<	public V reduceValues(BiFun<? super V, ? super V, ? extends V> reducer) {
3930	<	return fjp.invoke(ForkJoinTasks.reduceValues
3931	<	(ConcurrentHashMapV8.this, reducer));
4657	>	public final int hashCode() {
4658	>	int h = 0;
4659	>	for (Iterator<?> it = iterator(); it.hasNext();)
4660	>	h += it.next().hashCode();
4661	>	return h;
4662		}
4663
4664	<	/**
4665	<	* Returns the result of accumulating the given transformation
4666	<	* of all values using the given reducer to combine values, or
4667	<	* null if none.
4668	<	*
4669	<	* @param transformer a function returning the transformation
4670	<	* for an element, or null of there is no transformation (in
4671	<	* which case it is not combined).
4672	<	* @param reducer a commutative associative combining function
4673	<	* @return the result of accumulating the given transformation
4674	<	* of all values
4675	<	*/
4676	<	public <U> U reduceValues(Fun<? super V, ? extends U> transformer,
4677	<	BiFun<? super U, ? super U, ? extends U> reducer) {
3948	<	return fjp.invoke(ForkJoinTasks.reduceValues
3949	<	(ConcurrentHashMapV8.this, transformer, reducer));
4664	>	public final String toString() {
4665	>	StringBuilder sb = new StringBuilder();
4666	>	sb.append('[');
4667	>	Iterator<?> it = iterator();
4668	>	if (it.hasNext()) {
4669	>	for (;;) {
4670	>	Object e = it.next();
4671	>	sb.append(e == this ? "(this Collection)" : e);
4672	>	if (!it.hasNext())
4673	>	break;
4674	>	sb.append(',').append(' ');
4675	>	}
4676	>	}
4677	>	return sb.append(']').toString();
4678		}
4679
4680	<	/**
4681	<	* Returns the result of accumulating the given transformation
4682	<	* of all values using the given reducer to combine values,
4683	<	* and the given basis as an identity value.
4684	<	*
4685	<	* @param transformer a function returning the transformation
4686	<	* for an element
4687	<	* @param basis the identity (initial default value) for the reduction
4688	<	* @param reducer a commutative associative combining function
3961	<	* @return the result of accumulating the given transformation
3962	<	* of all values
3963	<	*/
3964	<	public double reduceValuesToDouble(ObjectToDouble<? super V> transformer,
3965	<	double basis,
3966	<	DoubleByDoubleToDouble reducer) {
3967	<	return fjp.invoke(ForkJoinTasks.reduceValuesToDouble
3968	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
4680	>	public final boolean containsAll(Collection<?> c) {
4681	>	if (c != this) {
4682	>	for (Iterator<?> it = c.iterator(); it.hasNext();) {
4683	>	Object e = it.next();
4684	>	if (e == null || !contains(e))
4685	>	return false;
4686	>	}
4687	>	}
4688	>	return true;
4689		}
4690
4691	<	/**
4692	<	* Returns the result of accumulating the given transformation
4693	<	* of all values using the given reducer to combine values,
4694	<	* and the given basis as an identity value.
4695	<	*
4696	<	* @param transformer a function returning the transformation
4697	<	* for an element
4698	<	* @param basis the identity (initial default value) for the reduction
4699	<	* @param reducer a commutative associative combining function
3980	<	* @return the result of accumulating the given transformation
3981	<	* of all values
3982	<	*/
3983	<	public long reduceValuesToLong(ObjectToLong<? super V> transformer,
3984	<	long basis,
3985	<	LongByLongToLong reducer) {
3986	<	return fjp.invoke(ForkJoinTasks.reduceValuesToLong
3987	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
4691	>	public final boolean removeAll(Collection<?> c) {
4692	>	boolean modified = false;
4693	>	for (Iterator<?> it = iterator(); it.hasNext();) {
4694	>	if (c.contains(it.next())) {
4695	>	it.remove();
4696	>	modified = true;
4697	>	}
4698	>	}
4699	>	return modified;
4700		}
4701
4702	<	/**
4703	<	* Returns the result of accumulating the given transformation
4704	<	* of all values using the given reducer to combine values,
4705	<	* and the given basis as an identity value.
4706	<	*
4707	<	* @param transformer a function returning the transformation
4708	<	* for an element
4709	<	* @param basis the identity (initial default value) for the reduction
4710	<	* @param reducer a commutative associative combining function
3999	<	* @return the result of accumulating the given transformation
4000	<	* of all values
4001	<	*/
4002	<	public int reduceValuesToInt(ObjectToInt<? super V> transformer,
4003	<	int basis,
4004	<	IntByIntToInt reducer) {
4005	<	return fjp.invoke(ForkJoinTasks.reduceValuesToInt
4006	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
4702	>	public final boolean retainAll(Collection<?> c) {
4703	>	boolean modified = false;
4704	>	for (Iterator<?> it = iterator(); it.hasNext();) {
4705	>	if (!c.contains(it.next())) {
4706	>	it.remove();
4707	>	modified = true;
4708	>	}
4709	>	}
4710	>	return modified;
4711		}
4712
4713	<	/**
4714	<	* Performs the given action for each entry.
4715	<	*
4716	<	* @param action the action
4717	<	*/
4718	<	public void forEachEntry(Action<Map.Entry<K,V>> action) {
4719	<	fjp.invoke(ForkJoinTasks.forEachEntry
4720	<	(ConcurrentHashMapV8.this, action));
4713	>	}
4714	>
4715	>	/**
4716	>	* A view of a ConcurrentHashMapV8 as a {@link Set} of keys, in
4717	>	* which additions may optionally be enabled by mapping to a
4718	>	* common value.  This class cannot be directly instantiated. See
4719	>	* {@link #keySet}, {@link #keySet(Object)}, {@link #newKeySet()},
4720	>	* {@link #newKeySet(int)}.
4721	>	*/
4722	>	public static class KeySetView<K,V> extends CHMView<K,V>
4723	>	implements Set<K>, java.io.Serializable {
4724	>	private static final long serialVersionUID = 7249069246763182397L;
4725	>	private final V value;
4726	>	KeySetView(ConcurrentHashMapV8<K, V> map, V value) {  // non-public
4727	>	super(map);
4728	>	this.value = value;
4729		}
4730
4731		/**
4732	<	* Performs the given action for each non-null transformation
4733	<	* of each entry.
4732	>	* Returns the default mapped value for additions,
4733	>	* or {@code null} if additions are not supported.
4734		*
4735	<	* @param transformer a function returning the transformation
4736	<	* for an element, or null of there is no transformation (in
4025	<	* which case the action is not applied).
4026	<	* @param action the action
4735	>	* @return the default mapped value for additions, or {@code null}
4736	>	* if not supported.
4737		*/
4738	<	public <U> void forEachEntry(Fun<Map.Entry<K,V>, ? extends U> transformer,
4739	<	Action<U> action) {
4740	<	fjp.invoke(ForkJoinTasks.forEachEntry
4741	<	(ConcurrentHashMapV8.this, transformer, action));
4742	<	}
4738	>	public V getMappedValue() { return value; }
4739	>
4740	>	// implement Set API
4741	>
4742	>	public boolean contains(Object o) { return map.containsKey(o); }
4743	>	public boolean remove(Object o)   { return map.remove(o) != null; }
4744
4745		/**
4746	<	* Returns a non-null result from applying the given search
4747	<	* function on each entry, or null if none.  Further element
4748	<	* processing is suppressed upon success. However, this method
4749	<	* does not return until other in-progress parallel
4750	<	* invocations of the search function also complete.
4746	>	* Returns a "weakly consistent" iterator that will never
4747	>	* throw {@link ConcurrentModificationException}, and
4748	>	* guarantees to traverse elements as they existed upon
4749	>	* construction of the iterator, and may (but is not
4750	>	* guaranteed to) reflect any modifications subsequent to
4751	>	* construction.
4752		*
4753	<	* @param searchFunction a function returning a non-null
4042	<	* result on success, else null
4043	<	* @return a non-null result from applying the given search
4044	<	* function on each entry, or null if none
4753	>	* @return an iterator over the keys of this map
4754		*/
4755	<	public <U> U searchEntries(Fun<Map.Entry<K,V>, ? extends U> searchFunction) {
4756	<	return fjp.invoke(ForkJoinTasks.searchEntries
4757	<	(ConcurrentHashMapV8.this, searchFunction));
4755	>	public Iterator<K> iterator()     { return new KeyIterator<K,V>(map); }
4756	>	public boolean add(K e) {
4757	>	V v;
4758	>	if ((v = value) == null)
4759	>	throw new UnsupportedOperationException();
4760	>	if (e == null)
4761	>	throw new NullPointerException();
4762	>	return map.internalPut(e, v, true) == null;
4763	>	}
4764	>	public boolean addAll(Collection<? extends K> c) {
4765	>	boolean added = false;
4766	>	V v;
4767	>	if ((v = value) == null)
4768	>	throw new UnsupportedOperationException();
4769	>	for (K e : c) {
4770	>	if (e == null)
4771	>	throw new NullPointerException();
4772	>	if (map.internalPut(e, v, true) == null)
4773	>	added = true;
4774	>	}
4775	>	return added;
4776	>	}
4777	>	public boolean equals(Object o) {
4778	>	Set<?> c;
4779	>	return ((o instanceof Set) &&
4780	>	((c = (Set<?>)o) == this ||
4781	>	(containsAll(c) && c.containsAll(this))));
4782		}
4783	+	}
4784
4785	<	/**
4786	<	* Returns the result of accumulating all entries using the
4787	<	* given reducer to combine values, or null if none.
4788	<	*
4789	<	* @param reducer a commutative associative combining function
4790	<	* @return the result of accumulating all entries
4791	<	*/
4792	<	public Map.Entry<K,V> reduceEntries(BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
4793	<	return fjp.invoke(ForkJoinTasks.reduceEntries
4794	<	(ConcurrentHashMapV8.this, reducer));
4785	>	/**
4786	>	* A view of a ConcurrentHashMapV8 as a {@link Collection} of
4787	>	* values, in which additions are disabled. This class cannot be
4788	>	* directly instantiated. See {@link #values},
4789	>	*
4790	>	* <p>The view's {@code iterator} is a "weakly consistent" iterator
4791	>	* that will never throw {@link ConcurrentModificationException},
4792	>	* and guarantees to traverse elements as they existed upon
4793	>	* construction of the iterator, and may (but is not guaranteed to)
4794	>	* reflect any modifications subsequent to construction.
4795	>	*/
4796	>	public static final class ValuesView<K,V> extends CHMView<K,V>
4797	>	implements Collection<V> {
4798	>	ValuesView(ConcurrentHashMapV8<K, V> map)   { super(map); }
4799	>	public final boolean contains(Object o) { return map.containsValue(o); }
4800	>	public final boolean remove(Object o) {
4801	>	if (o != null) {
4802	>	Iterator<V> it = new ValueIterator<K,V>(map);
4803	>	while (it.hasNext()) {
4804	>	if (o.equals(it.next())) {
4805	>	it.remove();
4806	>	return true;
4807	>	}
4808	>	}
4809	>	}
4810	>	return false;
4811		}
4812
4813		/**
4814	<	* Returns the result of accumulating the given transformation
4815	<	* of all entries using the given reducer to combine values,
4816	<	* or null if none.
4814	>	* Returns a "weakly consistent" iterator that will never
4815	>	* throw {@link ConcurrentModificationException}, and
4816	>	* guarantees to traverse elements as they existed upon
4817	>	* construction of the iterator, and may (but is not
4818	>	* guaranteed to) reflect any modifications subsequent to
4819	>	* construction.
4820		*
4821	<	* @param transformer a function returning the transformation
4069	<	* for an element, or null of there is no transformation (in
4070	<	* which case it is not combined).
4071	<	* @param reducer a commutative associative combining function
4072	<	* @return the result of accumulating the given transformation
4073	<	* of all entries
4821	>	* @return an iterator over the values of this map
4822		*/
4823	<	public <U> U reduceEntries(Fun<Map.Entry<K,V>, ? extends U> transformer,
4824	<	BiFun<? super U, ? super U, ? extends U> reducer) {
4825	<	return fjp.invoke(ForkJoinTasks.reduceEntries
4826	<	(ConcurrentHashMapV8.this, transformer, reducer));
4823	>	public final Iterator<V> iterator() {
4824	>	return new ValueIterator<K,V>(map);
4825	>	}
4826	>	public final boolean add(V e) {
4827	>	throw new UnsupportedOperationException();
4828	>	}
4829	>	public final boolean addAll(Collection<? extends V> c) {
4830	>	throw new UnsupportedOperationException();
4831		}
4832
4833	<	/**
4834	<	* Returns the result of accumulating the given transformation
4835	<	* of all entries using the given reducer to combine values,
4836	<	* and the given basis as an identity value.
4837	<	*
4838	<	* @param transformer a function returning the transformation
4839	<	* for an element
4840	<	* @param basis the identity (initial default value) for the reduction
4841	<	* @param reducer a commutative associative combining function
4842	<	* @return the result of accumulating the given transformation
4843	<	* of all entries
4844	<	*/
4845	<	public double reduceEntriesToDouble(ObjectToDouble<Map.Entry<K,V>> transformer,
4846	<	double basis,
4847	<	DoubleByDoubleToDouble reducer) {
4848	<	return fjp.invoke(ForkJoinTasks.reduceEntriesToDouble
4849	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
4833	>	}
4834	>
4835	>	/**
4836	>	* A view of a ConcurrentHashMapV8 as a {@link Set} of (key, value)
4837	>	* entries.  This class cannot be directly instantiated. See
4838	>	* {@link #entrySet}.
4839	>	*/
4840	>	public static final class EntrySetView<K,V> extends CHMView<K,V>
4841	>	implements Set<Map.Entry<K,V>> {
4842	>	EntrySetView(ConcurrentHashMapV8<K, V> map) { super(map); }
4843	>	public final boolean contains(Object o) {
4844	>	Object k, v, r; Map.Entry<?,?> e;
4845	>	return ((o instanceof Map.Entry) &&
4846	>	(k = (e = (Map.Entry<?,?>)o).getKey()) != null &&
4847	>	(r = map.get(k)) != null &&
4848	>	(v = e.getValue()) != null &&
4849	>	(v == r || v.equals(r)));
4850	>	}
4851	>	public final boolean remove(Object o) {
4852	>	Object k, v; Map.Entry<?,?> e;
4853	>	return ((o instanceof Map.Entry) &&
4854	>	(k = (e = (Map.Entry<?,?>)o).getKey()) != null &&
4855	>	(v = e.getValue()) != null &&
4856	>	map.remove(k, v));
4857		}
4858
4859		/**
4860	<	* Returns the result of accumulating the given transformation
4861	<	* of all entries using the given reducer to combine values,
4862	<	* and the given basis as an identity value.
4860	>	* Returns a "weakly consistent" iterator that will never
4861	>	* throw {@link ConcurrentModificationException}, and
4862	>	* guarantees to traverse elements as they existed upon
4863	>	* construction of the iterator, and may (but is not
4864	>	* guaranteed to) reflect any modifications subsequent to
4865	>	* construction.
4866		*
4867	<	* @param transformer a function returning the transformation
4106	<	* for an element
4107	<	* @param basis the identity (initial default value) for the reduction
4108	<	* @param reducer a commutative associative combining function
4109	<	* @return  the result of accumulating the given transformation
4110	<	* of all entries
4867	>	* @return an iterator over the entries of this map
4868		*/
4869	<	public long reduceEntriesToLong(ObjectToLong<Map.Entry<K,V>> transformer,
4870	<	long basis,
4114	<	LongByLongToLong reducer) {
4115	<	return fjp.invoke(ForkJoinTasks.reduceEntriesToLong
4116	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
4869	>	public final Iterator<Map.Entry<K,V>> iterator() {
4870	>	return new EntryIterator<K,V>(map);
4871		}
4872
4873	<	/**
4874	<	* Returns the result of accumulating the given transformation
4875	<	* of all entries using the given reducer to combine values,
4876	<	* and the given basis as an identity value.
4877	<	*
4878	<	* @param transformer a function returning the transformation
4879	<	* for an element
4880	<	* @param basis the identity (initial default value) for the reduction
4881	<	* @param reducer a commutative associative combining function
4882	<	* @return the result of accumulating the given transformation
4883	<	* of all entries
4884	<	*/
4885	<	public int reduceEntriesToInt(ObjectToInt<Map.Entry<K,V>> transformer,
4886	<	int basis,
4887	<	IntByIntToInt reducer) {
4888	<	return fjp.invoke(ForkJoinTasks.reduceEntriesToInt
4889	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
4873	>	public final boolean add(Entry<K,V> e) {
4874	>	K key = e.getKey();
4875	>	V value = e.getValue();
4876	>	if (key == null || value == null)
4877	>	throw new NullPointerException();
4878	>	return map.internalPut(key, value, false) == null;
4879	>	}
4880	>	public final boolean addAll(Collection<? extends Entry<K,V>> c) {
4881	>	boolean added = false;
4882	>	for (Entry<K,V> e : c) {
4883	>	if (add(e))
4884	>	added = true;
4885	>	}
4886	>	return added;
4887	>	}
4888	>	public boolean equals(Object o) {
4889	>	Set<?> c;
4890	>	return ((o instanceof Set) &&
4891	>	((c = (Set<?>)o) == this ||
4892	>	(containsAll(c) && c.containsAll(this))));
4893		}
4894		}
4895
#	Line 4140 | Line 4897 | public class ConcurrentHashMapV8<K, V>
4897
4898		/**
4899		* Predefined tasks for performing bulk parallel operations on
4900	<	* ConcurrentHashMaps. These tasks follow the forms and rules used
4901	<	* in class {@link Parallel}. Each method has the same name, but
4902	<	* returns a task rather than invoking it. These methods may be
4903	<	* useful in custom applications such as submitting a task without
4904	<	* waiting for completion, or combining with other tasks.
4900	>	* ConcurrentHashMapV8s. These tasks follow the forms and rules used
4901	>	* for bulk operations. Each method has the same name, but returns
4902	>	* a task rather than invoking it. These methods may be useful in
4903	>	* custom applications such as submitting a task without waiting
4904	>	* for completion, using a custom pool, or combining with other
4905	>	* tasks.
4906		*/
4907		public static class ForkJoinTasks {
4908		private ForkJoinTasks() {}
#	Line 4161 | Line 4919 | public class ConcurrentHashMapV8<K, V>
4919		(ConcurrentHashMapV8<K,V> map,
4920		BiAction<K,V> action) {
4921		if (action == null) throw new NullPointerException();
4922	<	return new ForEachMappingTask<K,V>(map, action);
4922	>	return new ForEachMappingTask<K,V>(map, null, -1, action);
4923		}
4924
4925		/**
#	Line 4170 | Line 4928 | public class ConcurrentHashMapV8<K, V>
4928		*
4929		* @param map the map
4930		* @param transformer a function returning the transformation
4931	<	* for an element, or null of there is no transformation (in
4932	<	* which case the action is not applied).
4931	>	* for an element, or null if there is no transformation (in
4932	>	* which case the action is not applied)
4933		* @param action the action
4934		* @return the task
4935		*/
#	Line 4182 | Line 4940 | public class ConcurrentHashMapV8<K, V>
4940		if (transformer == null || action == null)
4941		throw new NullPointerException();
4942		return new ForEachTransformedMappingTask<K,V,U>
4943	<	(map, transformer, action);
4943	>	(map, null, -1, transformer, action);
4944		}
4945
4946		/**
4947	<	* Returns a task that when invoked, returns a non-null
4948	<	* result from applying the given search function on each
4949	<	* (key, value), or null if none.  Further element processing
4950	<	* is suppressed upon success. However, this method does not
4951	<	* return until other in-progress parallel invocations of the
4194	<	* search function also complete.
4947	>	* Returns a task that when invoked, returns a non-null result
4948	>	* from applying the given search function on each (key,
4949	>	* value), or null if none. Upon success, further element
4950	>	* processing is suppressed and the results of any other
4951	>	* parallel invocations of the search function are ignored.
4952		*
4953		* @param map the map
4954		* @param searchFunction a function returning a non-null
#	Line 4203 | Line 4960 | public class ConcurrentHashMapV8<K, V>
4960		BiFun<? super K, ? super V, ? extends U> searchFunction) {
4961		if (searchFunction == null) throw new NullPointerException();
4962		return new SearchMappingsTask<K,V,U>
4963	<	(map, searchFunction,
4963	>	(map, null, -1, searchFunction,
4964		new AtomicReference<U>());
4965		}
4966
#	Line 4214 | Line 4971 | public class ConcurrentHashMapV8<K, V>
4971		*
4972		* @param map the map
4973		* @param transformer a function returning the transformation
4974	<	* for an element, or null of there is no transformation (in
4974	>	* for an element, or null if there is no transformation (in
4975		* which case it is not combined).
4976		* @param reducer a commutative associative combining function
4977		* @return the task
#	Line 4226 | Line 4983 | public class ConcurrentHashMapV8<K, V>
4983		if (transformer == null || reducer == null)
4984		throw new NullPointerException();
4985		return new MapReduceMappingsTask<K,V,U>
4986	<	(map, transformer, reducer);
4986	>	(map, null, -1, null, transformer, reducer);
4987		}
4988
4989		/**
#	Line 4250 | Line 5007 | public class ConcurrentHashMapV8<K, V>
5007		if (transformer == null || reducer == null)
5008		throw new NullPointerException();
5009		return new MapReduceMappingsToDoubleTask<K,V>
5010	<	(map, transformer, basis, reducer);
5010	>	(map, null, -1, null, transformer, basis, reducer);
5011		}
5012
5013		/**
#	Line 4274 | Line 5031 | public class ConcurrentHashMapV8<K, V>
5031		if (transformer == null || reducer == null)
5032		throw new NullPointerException();
5033		return new MapReduceMappingsToLongTask<K,V>
5034	<	(map, transformer, basis, reducer);
5034	>	(map, null, -1, null, transformer, basis, reducer);
5035		}
5036
5037		/**
#	Line 4297 | Line 5054 | public class ConcurrentHashMapV8<K, V>
5054		if (transformer == null || reducer == null)
5055		throw new NullPointerException();
5056		return new MapReduceMappingsToIntTask<K,V>
5057	<	(map, transformer, basis, reducer);
5057	>	(map, null, -1, null, transformer, basis, reducer);
5058		}
5059
5060		/**
#	Line 4312 | Line 5069 | public class ConcurrentHashMapV8<K, V>
5069		(ConcurrentHashMapV8<K,V> map,
5070		Action<K> action) {
5071		if (action == null) throw new NullPointerException();
5072	<	return new ForEachKeyTask<K,V>(map, action);
5072	>	return new ForEachKeyTask<K,V>(map, null, -1, action);
5073		}
5074
5075		/**
#	Line 4321 | Line 5078 | public class ConcurrentHashMapV8<K, V>
5078		*
5079		* @param map the map
5080		* @param transformer a function returning the transformation
5081	<	* for an element, or null of there is no transformation (in
5082	<	* which case the action is not applied).
5081	>	* for an element, or null if there is no transformation (in
5082	>	* which case the action is not applied)
5083		* @param action the action
5084		* @return the task
5085		*/
#	Line 4333 | Line 5090 | public class ConcurrentHashMapV8<K, V>
5090		if (transformer == null || action == null)
5091		throw new NullPointerException();
5092		return new ForEachTransformedKeyTask<K,V,U>
5093	<	(map, transformer, action);
5093	>	(map, null, -1, transformer, action);
5094		}
5095
5096		/**
5097		* Returns a task that when invoked, returns a non-null result
5098		* from applying the given search function on each key, or
5099	<	* null if none.  Further element processing is suppressed
5100	<	* upon success. However, this method does not return until
5101	<	* other in-progress parallel invocations of the search
4345	<	* function also complete.
5099	>	* null if none.  Upon success, further element processing is
5100	>	* suppressed and the results of any other parallel
5101	>	* invocations of the search function are ignored.
5102		*
5103		* @param map the map
5104		* @param searchFunction a function returning a non-null
#	Line 4354 | Line 5110 | public class ConcurrentHashMapV8<K, V>
5110		Fun<? super K, ? extends U> searchFunction) {
5111		if (searchFunction == null) throw new NullPointerException();
5112		return new SearchKeysTask<K,V,U>
5113	<	(map, searchFunction,
5113	>	(map, null, -1, searchFunction,
5114		new AtomicReference<U>());
5115		}
5116
#	Line 4372 | Line 5128 | public class ConcurrentHashMapV8<K, V>
5128		BiFun<? super K, ? super K, ? extends K> reducer) {
5129		if (reducer == null) throw new NullPointerException();
5130		return new ReduceKeysTask<K,V>
5131	<	(map, reducer);
5131	>	(map, null, -1, null, reducer);
5132		}
5133
5134		/**
#	Line 4382 | Line 5138 | public class ConcurrentHashMapV8<K, V>
5138		*
5139		* @param map the map
5140		* @param transformer a function returning the transformation
5141	<	* for an element, or null of there is no transformation (in
5141	>	* for an element, or null if there is no transformation (in
5142		* which case it is not combined).
5143		* @param reducer a commutative associative combining function
5144		* @return the task
#	Line 4394 | Line 5150 | public class ConcurrentHashMapV8<K, V>
5150		if (transformer == null || reducer == null)
5151		throw new NullPointerException();
5152		return new MapReduceKeysTask<K,V,U>
5153	<	(map, transformer, reducer);
5153	>	(map, null, -1, null, transformer, reducer);
5154		}
5155
5156		/**
#	Line 4418 | Line 5174 | public class ConcurrentHashMapV8<K, V>
5174		if (transformer == null || reducer == null)
5175		throw new NullPointerException();
5176		return new MapReduceKeysToDoubleTask<K,V>
5177	<	(map, transformer, basis, reducer);
5177	>	(map, null, -1, null, transformer, basis, reducer);
5178		}
5179
5180		/**
#	Line 4442 | Line 5198 | public class ConcurrentHashMapV8<K, V>
5198		if (transformer == null || reducer == null)
5199		throw new NullPointerException();
5200		return new MapReduceKeysToLongTask<K,V>
5201	<	(map, transformer, basis, reducer);
5201	>	(map, null, -1, null, transformer, basis, reducer);
5202		}
5203
5204		/**
#	Line 4466 | Line 5222 | public class ConcurrentHashMapV8<K, V>
5222		if (transformer == null || reducer == null)
5223		throw new NullPointerException();
5224		return new MapReduceKeysToIntTask<K,V>
5225	<	(map, transformer, basis, reducer);
5225	>	(map, null, -1, null, transformer, basis, reducer);
5226		}
5227
5228		/**
#	Line 4480 | Line 5236 | public class ConcurrentHashMapV8<K, V>
5236		(ConcurrentHashMapV8<K,V> map,
5237		Action<V> action) {
5238		if (action == null) throw new NullPointerException();
5239	<	return new ForEachValueTask<K,V>(map, action);
5239	>	return new ForEachValueTask<K,V>(map, null, -1, action);
5240		}
5241
5242		/**
#	Line 4489 | Line 5245 | public class ConcurrentHashMapV8<K, V>
5245		*
5246		* @param map the map
5247		* @param transformer a function returning the transformation
5248	<	* for an element, or null of there is no transformation (in
5249	<	* which case the action is not applied).
5248	>	* for an element, or null if there is no transformation (in
5249	>	* which case the action is not applied)
5250		* @param action the action
5251		*/
5252		public static <K,V,U> ForkJoinTask<Void> forEachValue
#	Line 4500 | Line 5256 | public class ConcurrentHashMapV8<K, V>
5256		if (transformer == null || action == null)
5257		throw new NullPointerException();
5258		return new ForEachTransformedValueTask<K,V,U>
5259	<	(map, transformer, action);
5259	>	(map, null, -1, transformer, action);
5260		}
5261
5262		/**
5263		* Returns a task that when invoked, returns a non-null result
5264		* from applying the given search function on each value, or
5265	<	* null if none.  Further element processing is suppressed
5266	<	* upon success. However, this method does not return until
5267	<	* other in-progress parallel invocations of the search
4512	<	* function also complete.
5265	>	* null if none.  Upon success, further element processing is
5266	>	* suppressed and the results of any other parallel
5267	>	* invocations of the search function are ignored.
5268		*
5269		* @param map the map
5270		* @param searchFunction a function returning a non-null
5271		* result on success, else null
5272		* @return the task
4518	–	*
5273		*/
5274		public static <K,V,U> ForkJoinTask<U> searchValues
5275		(ConcurrentHashMapV8<K,V> map,
5276		Fun<? super V, ? extends U> searchFunction) {
5277		if (searchFunction == null) throw new NullPointerException();
5278		return new SearchValuesTask<K,V,U>
5279	<	(map, searchFunction,
5279	>	(map, null, -1, searchFunction,
5280		new AtomicReference<U>());
5281		}
5282
#	Line 4540 | Line 5294 | public class ConcurrentHashMapV8<K, V>
5294		BiFun<? super V, ? super V, ? extends V> reducer) {
5295		if (reducer == null) throw new NullPointerException();
5296		return new ReduceValuesTask<K,V>
5297	<	(map, reducer);
5297	>	(map, null, -1, null, reducer);
5298		}
5299
5300		/**
#	Line 4550 | Line 5304 | public class ConcurrentHashMapV8<K, V>
5304		*
5305		* @param map the map
5306		* @param transformer a function returning the transformation
5307	<	* for an element, or null of there is no transformation (in
5307	>	* for an element, or null if there is no transformation (in
5308		* which case it is not combined).
5309		* @param reducer a commutative associative combining function
5310		* @return the task
#	Line 4562 | Line 5316 | public class ConcurrentHashMapV8<K, V>
5316		if (transformer == null || reducer == null)
5317		throw new NullPointerException();
5318		return new MapReduceValuesTask<K,V,U>
5319	<	(map, transformer, reducer);
5319	>	(map, null, -1, null, transformer, reducer);
5320		}
5321
5322		/**
#	Line 4586 | Line 5340 | public class ConcurrentHashMapV8<K, V>
5340		if (transformer == null || reducer == null)
5341		throw new NullPointerException();
5342		return new MapReduceValuesToDoubleTask<K,V>
5343	<	(map, transformer, basis, reducer);
5343	>	(map, null, -1, null, transformer, basis, reducer);
5344		}
5345
5346		/**
#	Line 4610 | Line 5364 | public class ConcurrentHashMapV8<K, V>
5364		if (transformer == null || reducer == null)
5365		throw new NullPointerException();
5366		return new MapReduceValuesToLongTask<K,V>
5367	<	(map, transformer, basis, reducer);
5367	>	(map, null, -1, null, transformer, basis, reducer);
5368		}
5369
5370		/**
#	Line 4634 | Line 5388 | public class ConcurrentHashMapV8<K, V>
5388		if (transformer == null || reducer == null)
5389		throw new NullPointerException();
5390		return new MapReduceValuesToIntTask<K,V>
5391	<	(map, transformer, basis, reducer);
5391	>	(map, null, -1, null, transformer, basis, reducer);
5392		}
5393
5394		/**
#	Line 4648 | Line 5402 | public class ConcurrentHashMapV8<K, V>
5402		(ConcurrentHashMapV8<K,V> map,
5403		Action<Map.Entry<K,V>> action) {
5404		if (action == null) throw new NullPointerException();
5405	<	return new ForEachEntryTask<K,V>(map, action);
5405	>	return new ForEachEntryTask<K,V>(map, null, -1, action);
5406		}
5407
5408		/**
#	Line 4657 | Line 5411 | public class ConcurrentHashMapV8<K, V>
5411		*
5412		* @param map the map
5413		* @param transformer a function returning the transformation
5414	<	* for an element, or null of there is no transformation (in
5415	<	* which case the action is not applied).
5414	>	* for an element, or null if there is no transformation (in
5415	>	* which case the action is not applied)
5416		* @param action the action
5417		*/
5418		public static <K,V,U> ForkJoinTask<Void> forEachEntry
#	Line 4668 | Line 5422 | public class ConcurrentHashMapV8<K, V>
5422		if (transformer == null || action == null)
5423		throw new NullPointerException();
5424		return new ForEachTransformedEntryTask<K,V,U>
5425	<	(map, transformer, action);
5425	>	(map, null, -1, transformer, action);
5426		}
5427
5428		/**
5429		* Returns a task that when invoked, returns a non-null result
5430		* from applying the given search function on each entry, or
5431	<	* null if none.  Further element processing is suppressed
5432	<	* upon success. However, this method does not return until
5433	<	* other in-progress parallel invocations of the search
4680	<	* function also complete.
5431	>	* null if none.  Upon success, further element processing is
5432	>	* suppressed and the results of any other parallel
5433	>	* invocations of the search function are ignored.
5434		*
5435		* @param map the map
5436		* @param searchFunction a function returning a non-null
5437		* result on success, else null
5438		* @return the task
4686	–	*
5439		*/
5440		public static <K,V,U> ForkJoinTask<U> searchEntries
5441		(ConcurrentHashMapV8<K,V> map,
5442		Fun<Map.Entry<K,V>, ? extends U> searchFunction) {
5443		if (searchFunction == null) throw new NullPointerException();
5444		return new SearchEntriesTask<K,V,U>
5445	<	(map, searchFunction,
5445	>	(map, null, -1, searchFunction,
5446		new AtomicReference<U>());
5447		}
5448
#	Line 4708 | Line 5460 | public class ConcurrentHashMapV8<K, V>
5460		BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
5461		if (reducer == null) throw new NullPointerException();
5462		return new ReduceEntriesTask<K,V>
5463	<	(map, reducer);
5463	>	(map, null, -1, null, reducer);
5464		}
5465
5466		/**
#	Line 4718 | Line 5470 | public class ConcurrentHashMapV8<K, V>
5470		*
5471		* @param map the map
5472		* @param transformer a function returning the transformation
5473	<	* for an element, or null of there is no transformation (in
5473	>	* for an element, or null if there is no transformation (in
5474		* which case it is not combined).
5475		* @param reducer a commutative associative combining function
5476		* @return the task
#	Line 4730 | Line 5482 | public class ConcurrentHashMapV8<K, V>
5482		if (transformer == null || reducer == null)
5483		throw new NullPointerException();
5484		return new MapReduceEntriesTask<K,V,U>
5485	<	(map, transformer, reducer);
5485	>	(map, null, -1, null, transformer, reducer);
5486		}
5487
5488		/**
#	Line 4754 | Line 5506 | public class ConcurrentHashMapV8<K, V>
5506		if (transformer == null || reducer == null)
5507		throw new NullPointerException();
5508		return new MapReduceEntriesToDoubleTask<K,V>
5509	<	(map, transformer, basis, reducer);
5509	>	(map, null, -1, null, transformer, basis, reducer);
5510		}
5511
5512		/**
#	Line 4778 | Line 5530 | public class ConcurrentHashMapV8<K, V>
5530		if (transformer == null || reducer == null)
5531		throw new NullPointerException();
5532		return new MapReduceEntriesToLongTask<K,V>
5533	<	(map, transformer, basis, reducer);
5533	>	(map, null, -1, null, transformer, basis, reducer);
5534		}
5535
5536		/**
#	Line 4802 | Line 5554 | public class ConcurrentHashMapV8<K, V>
5554		if (transformer == null || reducer == null)
5555		throw new NullPointerException();
5556		return new MapReduceEntriesToIntTask<K,V>
5557	<	(map, transformer, basis, reducer);
5557	>	(map, null, -1, null, transformer, basis, reducer);
5558		}
5559		}
5560
5561		// -------------------------------------------------------
5562
4811	–	/**
4812	–	* Base for FJ tasks for bulk operations. This adds a variant of
4813	–	* CountedCompleters and some split and merge bookkeeping to
4814	–	* iterator functionality. The forEach and reduce methods are
4815	–	* similar to those illustrated in CountedCompleter documentation,
4816	–	* except that bottom-up reduction completions perform them within
4817	–	* their compute methods. The search methods are like forEach
4818	–	* except they continually poll for success and exit early.  Also,
4819	–	* exceptions are handled in a simpler manner, by just trying to
4820	–	* complete root task exceptionally.
4821	–	*/
4822	–	static abstract class BulkTask<K,V,R> extends Traverser<K,V,R> {
4823	–	final BulkTask<K,V,?> parent;  // completion target
4824	–	int batch;                     // split control
4825	–	int pending;                   // completion control
4826	–
4827	–	/** Constructor for root tasks */
4828	–	BulkTask(ConcurrentHashMapV8<K,V> map) {
4829	–	super(map);
4830	–	this.parent = null;
4831	–	this.batch = -1; // force call to batch() on execution
4832	–	}
4833	–
4834	–	/** Constructor for subtasks */
4835	–	BulkTask(BulkTask<K,V,?> parent, int batch, boolean split) {
4836	–	super(parent, split);
4837	–	this.parent = parent;
4838	–	this.batch = batch;
4839	–	}
4840	–
4841	–	// FJ methods
4842	–
4843	–	/**
4844	–	* Propagates completion. Note that all reduce actions
4845	–	* bypass this method to combine while completing.
4846	–	*/
4847	–	final void tryComplete() {
4848	–	BulkTask<K,V,?> a = this, s = a;
4849	–	for (int c;;) {
4850	–	if ((c = a.pending) == 0) {
4851	–	if ((a = (s = a).parent) == null) {
4852	–	s.quietlyComplete();
4853	–	break;
4854	–	}
4855	–	}
4856	–	else if (U.compareAndSwapInt(a, PENDING, c, c - 1))
4857	–	break;
4858	–	}
4859	–	}
4860	–
4861	–	/**
4862	–	* Forces root task to throw exception unless already complete.
4863	–	*/
4864	–	final void tryAbortComputation(Throwable ex) {
4865	–	for (BulkTask<K,V,?> a = this;;) {
4866	–	BulkTask<K,V,?> p = a.parent;
4867	–	if (p == null) {
4868	–	a.completeExceptionally(ex);
4869	–	break;
4870	–	}
4871	–	a = p;
4872	–	}
4873	–	}
4874	–
4875	–	public final boolean exec() {
4876	–	try {
4877	–	compute();
4878	–	}
4879	–	catch (Throwable ex) {
4880	–	tryAbortComputation(ex);
4881	–	}
4882	–	return false;
4883	–	}
4884	–
4885	–	public abstract void compute();
4886	–
4887	–	// utilities
4888	–
4889	–	/** CompareAndSet pending count */
4890	–	final boolean casPending(int cmp, int val) {
4891	–	return U.compareAndSwapInt(this, PENDING, cmp, val);
4892	–	}
4893	–
4894	–	/**
4895	–	* Returns approx exp2 of the number of times (minus one) to
4896	–	* split task by two before executing leaf action. This value
4897	–	* is faster to compute and more convenient to use as a guide
4898	–	* to splitting than is the depth, since it is used while
4899	–	* dividing by two anyway.
4900	–	*/
4901	–	final int batch() {
4902	–	int b = batch;
4903	–	if (b < 0) {
4904	–	long n = map.counter.sum();
4905	–	int sp = getPool().getParallelism() << 3; // slack of 8
4906	–	b = batch = (n <= 0L) ? 0 : (n < (long)sp) ? (int)n : sp;
4907	–	}
4908	–	return b;
4909	–	}
4910	–
4911	–	/**
4912	–	* Error message for hoisted null checks of functions
4913	–	*/
4914	–	static final String NullFunctionMessage =
4915	–	"Unexpected null function";
4916	–
4917	–	/**
4918	–	* Returns exportable snapshot entry.
4919	–	*/
4920	–	static <K,V> AbstractMap.SimpleEntry<K,V> entryFor(K k, V v) {
4921	–	return new AbstractMap.SimpleEntry(k, v);
4922	–	}
4923	–
4924	–	// Unsafe mechanics
4925	–	private static final sun.misc.Unsafe U;
4926	–	private static final long PENDING;
4927	–	static {
4928	–	try {
4929	–	U = sun.misc.Unsafe.getUnsafe();
4930	–	PENDING = U.objectFieldOffset
4931	–	(BulkTask.class.getDeclaredField("pending"));
4932	–	} catch (Exception e) {
4933	–	throw new Error(e);
4934	–	}
4935	–	}
4936	–	}
4937	–
5563		/*
5564		* Task classes. Coded in a regular but ugly format/style to
5565		* simplify checks that each variant differs in the right way from
5566	<	* others.
5566	>	* others. The null screenings exist because compilers cannot tell
5567	>	* that we've already null-checked task arguments, so we force
5568	>	* simplest hoisted bypass to help avoid convoluted traps.
5569		*/
5570
5571	<	static final class ForEachKeyTask<K,V>
5572	<	extends BulkTask<K,V,Void> {
5571	>	@SuppressWarnings("serial") static final class ForEachKeyTask<K,V>
5572	>	extends Traverser<K,V,Void> {
5573		final Action<K> action;
5574		ForEachKeyTask
5575	<	(ConcurrentHashMapV8<K,V> m,
4949	<	Action<K> action) {
4950	<	super(m);
4951	<	this.action = action;
4952	<	}
4953	<	ForEachKeyTask
4954	<	(BulkTask<K,V,?> p, int b, boolean split,
5575	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5576		Action<K> action) {
5577	<	super(p, b, split);
5577	>	super(m, p, b);
5578		this.action = action;
5579		}
5580	<	public final void compute() {
5581	<	final Action<K> action = this.action;
5582	<	if (action == null)
5583	<	throw new Error(NullFunctionMessage);
5584	<	int b = batch(), c;
5585	<	while (b > 1 && baseIndex != baseLimit) {
5586	<	do {} while (!casPending(c = pending, c+1));
5587	<	new ForEachKeyTask<K,V>(this, b >>>= 1, true, action).fork();
5588	<	}
4968	<	while (advance() != null)
4969	<	action.apply((K)nextKey);
4970	<	tryComplete();
5580	>	@SuppressWarnings("unchecked") public final void compute() {
5581	>	final Action<K> action;
5582	>	if ((action = this.action) != null) {
5583	>	for (int b; (b = preSplit()) > 0;)
5584	>	new ForEachKeyTask<K,V>(map, this, b, action).fork();
5585	>	while (advance() != null)
5586	>	action.apply((K)nextKey);
5587	>	propagateCompletion();
5588	>	}
5589		}
5590		}
5591
5592	<	static final class ForEachValueTask<K,V>
5593	<	extends BulkTask<K,V,Void> {
5592	>	@SuppressWarnings("serial") static final class ForEachValueTask<K,V>
5593	>	extends Traverser<K,V,Void> {
5594		final Action<V> action;
5595		ForEachValueTask
5596	<	(ConcurrentHashMapV8<K,V> m,
5596	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5597		Action<V> action) {
5598	<	super(m);
5598	>	super(m, p, b);
5599		this.action = action;
5600		}
5601	<	ForEachValueTask
5602	<	(BulkTask<K,V,?> p, int b, boolean split,
5603	<	Action<V> action) {
5604	<	super(p, b, split);
5605	<	this.action = action;
5606	<	}
5607	<	public final void compute() {
5608	<	final Action<V> action = this.action;
5609	<	if (action == null)
5610	<	throw new Error(NullFunctionMessage);
4993	<	int b = batch(), c;
4994	<	while (b > 1 && baseIndex != baseLimit) {
4995	<	do {} while (!casPending(c = pending, c+1));
4996	<	new ForEachValueTask<K,V>(this, b >>>= 1, true, action).fork();
4997	<	}
4998	<	Object v;
4999	<	while ((v = advance()) != null)
5000	<	action.apply((V)v);
5001	<	tryComplete();
5601	>	@SuppressWarnings("unchecked") public final void compute() {
5602	>	final Action<V> action;
5603	>	if ((action = this.action) != null) {
5604	>	for (int b; (b = preSplit()) > 0;)
5605	>	new ForEachValueTask<K,V>(map, this, b, action).fork();
5606	>	V v;
5607	>	while ((v = advance()) != null)
5608	>	action.apply(v);
5609	>	propagateCompletion();
5610	>	}
5611		}
5612		}
5613
5614	<	static final class ForEachEntryTask<K,V>
5615	<	extends BulkTask<K,V,Void> {
5614	>	@SuppressWarnings("serial") static final class ForEachEntryTask<K,V>
5615	>	extends Traverser<K,V,Void> {
5616		final Action<Entry<K,V>> action;
5617		ForEachEntryTask
5618	<	(ConcurrentHashMapV8<K,V> m,
5010	<	Action<Entry<K,V>> action) {
5011	<	super(m);
5012	<	this.action = action;
5013	<	}
5014	<	ForEachEntryTask
5015	<	(BulkTask<K,V,?> p, int b, boolean split,
5618	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5619		Action<Entry<K,V>> action) {
5620	<	super(p, b, split);
5620	>	super(m, p, b);
5621		this.action = action;
5622		}
5623	<	public final void compute() {
5624	<	final Action<Entry<K,V>> action = this.action;
5625	<	if (action == null)
5626	<	throw new Error(NullFunctionMessage);
5627	<	int b = batch(), c;
5628	<	while (b > 1 && baseIndex != baseLimit) {
5629	<	do {} while (!casPending(c = pending, c+1));
5630	<	new ForEachEntryTask<K,V>(this, b >>>= 1, true, action).fork();
5631	<	}
5632	<	Object v;
5030	<	while ((v = advance()) != null)
5031	<	action.apply(entryFor((K)nextKey, (V)v));
5032	<	tryComplete();
5623	>	@SuppressWarnings("unchecked") public final void compute() {
5624	>	final Action<Entry<K,V>> action;
5625	>	if ((action = this.action) != null) {
5626	>	for (int b; (b = preSplit()) > 0;)
5627	>	new ForEachEntryTask<K,V>(map, this, b, action).fork();
5628	>	V v;
5629	>	while ((v = advance()) != null)
5630	>	action.apply(entryFor((K)nextKey, v));
5631	>	propagateCompletion();
5632	>	}
5633		}
5634		}
5635
5636	<	static final class ForEachMappingTask<K,V>
5637	<	extends BulkTask<K,V,Void> {
5636	>	@SuppressWarnings("serial") static final class ForEachMappingTask<K,V>
5637	>	extends Traverser<K,V,Void> {
5638		final BiAction<K,V> action;
5639		ForEachMappingTask
5640	<	(ConcurrentHashMapV8<K,V> m,
5041	<	BiAction<K,V> action) {
5042	<	super(m);
5043	<	this.action = action;
5044	<	}
5045	<	ForEachMappingTask
5046	<	(BulkTask<K,V,?> p, int b, boolean split,
5640	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5641		BiAction<K,V> action) {
5642	<	super(p, b, split);
5642	>	super(m, p, b);
5643		this.action = action;
5644		}
5645	<
5646	<	public final void compute() {
5647	<	final BiAction<K,V> action = this.action;
5648	<	if (action == null)
5649	<	throw new Error(NullFunctionMessage);
5650	<	int b = batch(), c;
5651	<	while (b > 1 && baseIndex != baseLimit) {
5652	<	do {} while (!casPending(c = pending, c+1));
5653	<	new ForEachMappingTask<K,V>(this, b >>>= 1, true,
5654	<	action).fork();
5061	<	}
5062	<	Object v;
5063	<	while ((v = advance()) != null)
5064	<	action.apply((K)nextKey, (V)v);
5065	<	tryComplete();
5645	>	@SuppressWarnings("unchecked") public final void compute() {
5646	>	final BiAction<K,V> action;
5647	>	if ((action = this.action) != null) {
5648	>	for (int b; (b = preSplit()) > 0;)
5649	>	new ForEachMappingTask<K,V>(map, this, b, action).fork();
5650	>	V v;
5651	>	while ((v = advance()) != null)
5652	>	action.apply((K)nextKey, v);
5653	>	propagateCompletion();
5654	>	}
5655		}
5656		}
5657
5658	<	static final class ForEachTransformedKeyTask<K,V,U>
5659	<	extends BulkTask<K,V,Void> {
5658	>	@SuppressWarnings("serial") static final class ForEachTransformedKeyTask<K,V,U>
5659	>	extends Traverser<K,V,Void> {
5660		final Fun<? super K, ? extends U> transformer;
5661		final Action<U> action;
5662		ForEachTransformedKeyTask
5663	<	(ConcurrentHashMapV8<K,V> m,
5664	<	Fun<? super K, ? extends U> transformer,
5665	<	Action<U> action) {
5666	<	super(m);
5667	<	this.transformer = transformer;
5668	<	this.action = action;
5669	<
5670	<	}
5671	<	ForEachTransformedKeyTask
5672	<	(BulkTask<K,V,?> p, int b, boolean split,
5673	<	Fun<? super K, ? extends U> transformer,
5674	<	Action<U> action) {
5675	<	super(p, b, split);
5676	<	this.transformer = transformer;
5677	<	this.action = action;
5678	<	}
5679	<	public final void compute() {
5680	<	final Fun<? super K, ? extends U> transformer =
5681	<	this.transformer;
5093	<	final Action<U> action = this.action;
5094	<	if (transformer == null || action == null)
5095	<	throw new Error(NullFunctionMessage);
5096	<	int b = batch(), c;
5097	<	while (b > 1 && baseIndex != baseLimit) {
5098	<	do {} while (!casPending(c = pending, c+1));
5099	<	new ForEachTransformedKeyTask<K,V,U>
5100	<	(this, b >>>= 1, true, transformer, action).fork();
5101	<	}
5102	<	U u;
5103	<	while (advance() != null) {
5104	<	if ((u = transformer.apply((K)nextKey)) != null)
5105	<	action.apply(u);
5663	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5664	>	Fun<? super K, ? extends U> transformer, Action<U> action) {
5665	>	super(m, p, b);
5666	>	this.transformer = transformer; this.action = action;
5667	>	}
5668	>	@SuppressWarnings("unchecked") public final void compute() {
5669	>	final Fun<? super K, ? extends U> transformer;
5670	>	final Action<U> action;
5671	>	if ((transformer = this.transformer) != null &&
5672	>	(action = this.action) != null) {
5673	>	for (int b; (b = preSplit()) > 0;)
5674	>	new ForEachTransformedKeyTask<K,V,U>
5675	>	(map, this, b, transformer, action).fork();
5676	>	U u;
5677	>	while (advance() != null) {
5678	>	if ((u = transformer.apply((K)nextKey)) != null)
5679	>	action.apply(u);
5680	>	}
5681	>	propagateCompletion();
5682		}
5107	–	tryComplete();
5683		}
5684		}
5685
5686	<	static final class ForEachTransformedValueTask<K,V,U>
5687	<	extends BulkTask<K,V,Void> {
5686	>	@SuppressWarnings("serial") static final class ForEachTransformedValueTask<K,V,U>
5687	>	extends Traverser<K,V,Void> {
5688		final Fun<? super V, ? extends U> transformer;
5689		final Action<U> action;
5690		ForEachTransformedValueTask
5691	<	(ConcurrentHashMapV8<K,V> m,
5692	<	Fun<? super V, ? extends U> transformer,
5693	<	Action<U> action) {
5694	<	super(m);
5695	<	this.transformer = transformer;
5696	<	this.action = action;
5697	<
5698	<	}
5699	<	ForEachTransformedValueTask
5700	<	(BulkTask<K,V,?> p, int b, boolean split,
5701	<	Fun<? super V, ? extends U> transformer,
5702	<	Action<U> action) {
5703	<	super(p, b, split);
5704	<	this.transformer = transformer;
5705	<	this.action = action;
5706	<	}
5707	<	public final void compute() {
5708	<	final Fun<? super V, ? extends U> transformer =
5709	<	this.transformer;
5135	<	final Action<U> action = this.action;
5136	<	if (transformer == null || action == null)
5137	<	throw new Error(NullFunctionMessage);
5138	<	int b = batch(), c;
5139	<	while (b > 1 && baseIndex != baseLimit) {
5140	<	do {} while (!casPending(c = pending, c+1));
5141	<	new ForEachTransformedValueTask<K,V,U>
5142	<	(this, b >>>= 1, true, transformer, action).fork();
5143	<	}
5144	<	Object v; U u;
5145	<	while ((v = advance()) != null) {
5146	<	if ((u = transformer.apply((V)v)) != null)
5147	<	action.apply(u);
5691	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5692	>	Fun<? super V, ? extends U> transformer, Action<U> action) {
5693	>	super(m, p, b);
5694	>	this.transformer = transformer; this.action = action;
5695	>	}
5696	>	@SuppressWarnings("unchecked") public final void compute() {
5697	>	final Fun<? super V, ? extends U> transformer;
5698	>	final Action<U> action;
5699	>	if ((transformer = this.transformer) != null &&
5700	>	(action = this.action) != null) {
5701	>	for (int b; (b = preSplit()) > 0;)
5702	>	new ForEachTransformedValueTask<K,V,U>
5703	>	(map, this, b, transformer, action).fork();
5704	>	V v; U u;
5705	>	while ((v = advance()) != null) {
5706	>	if ((u = transformer.apply(v)) != null)
5707	>	action.apply(u);
5708	>	}
5709	>	propagateCompletion();
5710		}
5149	–	tryComplete();
5711		}
5712		}
5713
5714	<	static final class ForEachTransformedEntryTask<K,V,U>
5715	<	extends BulkTask<K,V,Void> {
5714	>	@SuppressWarnings("serial") static final class ForEachTransformedEntryTask<K,V,U>
5715	>	extends Traverser<K,V,Void> {
5716		final Fun<Map.Entry<K,V>, ? extends U> transformer;
5717		final Action<U> action;
5718		ForEachTransformedEntryTask
5719	<	(ConcurrentHashMapV8<K,V> m,
5720	<	Fun<Map.Entry<K,V>, ? extends U> transformer,
5721	<	Action<U> action) {
5722	<	super(m);
5723	<	this.transformer = transformer;
5724	<	this.action = action;
5725	<
5726	<	}
5727	<	ForEachTransformedEntryTask
5728	<	(BulkTask<K,V,?> p, int b, boolean split,
5729	<	Fun<Map.Entry<K,V>, ? extends U> transformer,
5730	<	Action<U> action) {
5731	<	super(p, b, split);
5732	<	this.transformer = transformer;
5733	<	this.action = action;
5734	<	}
5735	<	public final void compute() {
5736	<	final Fun<Map.Entry<K,V>, ? extends U> transformer =
5737	<	this.transformer;
5738	<	final Action<U> action = this.action;
5178	<	if (transformer == null || action == null)
5179	<	throw new Error(NullFunctionMessage);
5180	<	int b = batch(), c;
5181	<	while (b > 1 && baseIndex != baseLimit) {
5182	<	do {} while (!casPending(c = pending, c+1));
5183	<	new ForEachTransformedEntryTask<K,V,U>
5184	<	(this, b >>>= 1, true, transformer, action).fork();
5185	<	}
5186	<	Object v; U u;
5187	<	while ((v = advance()) != null) {
5188	<	if ((u = transformer.apply(entryFor((K)nextKey, (V)v))) != null)
5189	<	action.apply(u);
5719	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5720	>	Fun<Map.Entry<K,V>, ? extends U> transformer, Action<U> action) {
5721	>	super(m, p, b);
5722	>	this.transformer = transformer; this.action = action;
5723	>	}
5724	>	@SuppressWarnings("unchecked") public final void compute() {
5725	>	final Fun<Map.Entry<K,V>, ? extends U> transformer;
5726	>	final Action<U> action;
5727	>	if ((transformer = this.transformer) != null &&
5728	>	(action = this.action) != null) {
5729	>	for (int b; (b = preSplit()) > 0;)
5730	>	new ForEachTransformedEntryTask<K,V,U>
5731	>	(map, this, b, transformer, action).fork();
5732	>	V v; U u;
5733	>	while ((v = advance()) != null) {
5734	>	if ((u = transformer.apply(entryFor((K)nextKey,
5735	>	v))) != null)
5736	>	action.apply(u);
5737	>	}
5738	>	propagateCompletion();
5739		}
5191	–	tryComplete();
5740		}
5741		}
5742
5743	<	static final class ForEachTransformedMappingTask<K,V,U>
5744	<	extends BulkTask<K,V,Void> {
5743	>	@SuppressWarnings("serial") static final class ForEachTransformedMappingTask<K,V,U>
5744	>	extends Traverser<K,V,Void> {
5745		final BiFun<? super K, ? super V, ? extends U> transformer;
5746		final Action<U> action;
5747		ForEachTransformedMappingTask
5748	<	(ConcurrentHashMapV8<K,V> m,
5201	<	BiFun<? super K, ? super V, ? extends U> transformer,
5202	<	Action<U> action) {
5203	<	super(m);
5204	<	this.transformer = transformer;
5205	<	this.action = action;
5206	<
5207	<	}
5208	<	ForEachTransformedMappingTask
5209	<	(BulkTask<K,V,?> p, int b, boolean split,
5748	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5749		BiFun<? super K, ? super V, ? extends U> transformer,
5750		Action<U> action) {
5751	<	super(p, b, split);
5752	<	this.transformer = transformer;
5214	<	this.action = action;
5751	>	super(m, p, b);
5752	>	this.transformer = transformer; this.action = action;
5753		}
5754	<	public final void compute() {
5755	<	final BiFun<? super K, ? super V, ? extends U> transformer =
5756	<	this.transformer;
5757	<	final Action<U> action = this.action;
5758	<	if (transformer == null || action == null)
5759	<	throw new Error(NullFunctionMessage);
5760	<	int b = batch(), c;
5761	<	while (b > 1 && baseIndex != baseLimit) {
5762	<	do {} while (!casPending(c = pending, c+1));
5763	<	new ForEachTransformedMappingTask<K,V,U>
5764	<	(this, b >>>= 1, true, transformer, action).fork();
5765	<	}
5766	<	Object v; U u;
5767	<	while ((v = advance()) != null) {
5230	<	if ((u = transformer.apply((K)nextKey, (V)v)) != null)
5231	<	action.apply(u);
5754	>	@SuppressWarnings("unchecked") public final void compute() {
5755	>	final BiFun<? super K, ? super V, ? extends U> transformer;
5756	>	final Action<U> action;
5757	>	if ((transformer = this.transformer) != null &&
5758	>	(action = this.action) != null) {
5759	>	for (int b; (b = preSplit()) > 0;)
5760	>	new ForEachTransformedMappingTask<K,V,U>
5761	>	(map, this, b, transformer, action).fork();
5762	>	V v; U u;
5763	>	while ((v = advance()) != null) {
5764	>	if ((u = transformer.apply((K)nextKey, v)) != null)
5765	>	action.apply(u);
5766	>	}
5767	>	propagateCompletion();
5768		}
5233	–	tryComplete();
5769		}
5770		}
5771
5772	<	static final class SearchKeysTask<K,V,U>
5773	<	extends BulkTask<K,V,U> {
5772	>	@SuppressWarnings("serial") static final class SearchKeysTask<K,V,U>
5773	>	extends Traverser<K,V,U> {
5774		final Fun<? super K, ? extends U> searchFunction;
5775		final AtomicReference<U> result;
5776		SearchKeysTask
5777	<	(ConcurrentHashMapV8<K,V> m,
5243	<	Fun<? super K, ? extends U> searchFunction,
5244	<	AtomicReference<U> result) {
5245	<	super(m);
5246	<	this.searchFunction = searchFunction; this.result = result;
5247	<	}
5248	<	SearchKeysTask
5249	<	(BulkTask<K,V,?> p, int b, boolean split,
5777	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5778		Fun<? super K, ? extends U> searchFunction,
5779		AtomicReference<U> result) {
5780	<	super(p, b, split);
5780	>	super(m, p, b);
5781		this.searchFunction = searchFunction; this.result = result;
5782		}
5783	<	public final void compute() {
5784	<	AtomicReference<U> result = this.result;
5785	<	final Fun<? super K, ? extends U> searchFunction =
5786	<	this.searchFunction;
5787	<	if (searchFunction == null || result == null)
5788	<	throw new Error(NullFunctionMessage);
5789	<	int b = batch(), c;
5790	<	while (b > 1 && baseIndex != baseLimit && result.get() == null) {
5791	<	do {} while (!casPending(c = pending, c+1));
5792	<	new SearchKeysTask<K,V,U>(this, b >>>= 1, true,
5793	<	searchFunction, result).fork();
5794	<	}
5795	<	U u;
5796	<	while (result.get() == null && advance() != null) {
5797	<	if ((u = searchFunction.apply((K)nextKey)) != null) {
5798	<	result.compareAndSet(null, u);
5799	<	break;
5783	>	public final U getRawResult() { return result.get(); }
5784	>	@SuppressWarnings("unchecked") public final void compute() {
5785	>	final Fun<? super K, ? extends U> searchFunction;
5786	>	final AtomicReference<U> result;
5787	>	if ((searchFunction = this.searchFunction) != null &&
5788	>	(result = this.result) != null) {
5789	>	for (int b;;) {
5790	>	if (result.get() != null)
5791	>	return;
5792	>	if ((b = preSplit()) <= 0)
5793	>	break;
5794	>	new SearchKeysTask<K,V,U>
5795	>	(map, this, b, searchFunction, result).fork();
5796	>	}
5797	>	while (result.get() == null) {
5798	>	U u;
5799	>	if (advance() == null) {
5800	>	propagateCompletion();
5801	>	break;
5802	>	}
5803	>	if ((u = searchFunction.apply((K)nextKey)) != null) {
5804	>	if (result.compareAndSet(null, u))
5805	>	quietlyCompleteRoot();
5806	>	break;
5807	>	}
5808		}
5809		}
5274	–	tryComplete();
5810		}
5276	–	public final U getRawResult() { return result.get(); }
5811		}
5812
5813	<	static final class SearchValuesTask<K,V,U>
5814	<	extends BulkTask<K,V,U> {
5813	>	@SuppressWarnings("serial") static final class SearchValuesTask<K,V,U>
5814	>	extends Traverser<K,V,U> {
5815		final Fun<? super V, ? extends U> searchFunction;
5816		final AtomicReference<U> result;
5817		SearchValuesTask
5818	<	(ConcurrentHashMapV8<K,V> m,
5285	<	Fun<? super V, ? extends U> searchFunction,
5286	<	AtomicReference<U> result) {
5287	<	super(m);
5288	<	this.searchFunction = searchFunction; this.result = result;
5289	<	}
5290	<	SearchValuesTask
5291	<	(BulkTask<K,V,?> p, int b, boolean split,
5818	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5819		Fun<? super V, ? extends U> searchFunction,
5820		AtomicReference<U> result) {
5821	<	super(p, b, split);
5821	>	super(m, p, b);
5822		this.searchFunction = searchFunction; this.result = result;
5823		}
5824	<	public final void compute() {
5825	<	AtomicReference<U> result = this.result;
5826	<	final Fun<? super V, ? extends U> searchFunction =
5827	<	this.searchFunction;
5828	<	if (searchFunction == null || result == null)
5829	<	throw new Error(NullFunctionMessage);
5830	<	int b = batch(), c;
5831	<	while (b > 1 && baseIndex != baseLimit && result.get() == null) {
5832	<	do {} while (!casPending(c = pending, c+1));
5833	<	new SearchValuesTask<K,V,U>(this, b >>>= 1, true,
5834	<	searchFunction, result).fork();
5835	<	}
5836	<	Object v; U u;
5837	<	while (result.get() == null && (v = advance()) != null) {
5838	<	if ((u = searchFunction.apply((V)v)) != null) {
5839	<	result.compareAndSet(null, u);
5840	<	break;
5824	>	public final U getRawResult() { return result.get(); }
5825	>	@SuppressWarnings("unchecked") public final void compute() {
5826	>	final Fun<? super V, ? extends U> searchFunction;
5827	>	final AtomicReference<U> result;
5828	>	if ((searchFunction = this.searchFunction) != null &&
5829	>	(result = this.result) != null) {
5830	>	for (int b;;) {
5831	>	if (result.get() != null)
5832	>	return;
5833	>	if ((b = preSplit()) <= 0)
5834	>	break;
5835	>	new SearchValuesTask<K,V,U>
5836	>	(map, this, b, searchFunction, result).fork();
5837	>	}
5838	>	while (result.get() == null) {
5839	>	V v; U u;
5840	>	if ((v = advance()) == null) {
5841	>	propagateCompletion();
5842	>	break;
5843	>	}
5844	>	if ((u = searchFunction.apply(v)) != null) {
5845	>	if (result.compareAndSet(null, u))
5846	>	quietlyCompleteRoot();
5847	>	break;
5848	>	}
5849		}
5850		}
5316	–	tryComplete();
5851		}
5318	–	public final U getRawResult() { return result.get(); }
5852		}
5853
5854	<	static final class SearchEntriesTask<K,V,U>
5855	<	extends BulkTask<K,V,U> {
5854	>	@SuppressWarnings("serial") static final class SearchEntriesTask<K,V,U>
5855	>	extends Traverser<K,V,U> {
5856		final Fun<Entry<K,V>, ? extends U> searchFunction;
5857		final AtomicReference<U> result;
5858		SearchEntriesTask
5859	<	(ConcurrentHashMapV8<K,V> m,
5327	<	Fun<Entry<K,V>, ? extends U> searchFunction,
5328	<	AtomicReference<U> result) {
5329	<	super(m);
5330	<	this.searchFunction = searchFunction; this.result = result;
5331	<	}
5332	<	SearchEntriesTask
5333	<	(BulkTask<K,V,?> p, int b, boolean split,
5859	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5860		Fun<Entry<K,V>, ? extends U> searchFunction,
5861		AtomicReference<U> result) {
5862	<	super(p, b, split);
5862	>	super(m, p, b);
5863		this.searchFunction = searchFunction; this.result = result;
5864		}
5865	<	public final void compute() {
5866	<	AtomicReference<U> result = this.result;
5867	<	final Fun<Entry<K,V>, ? extends U> searchFunction =
5868	<	this.searchFunction;
5869	<	if (searchFunction == null || result == null)
5870	<	throw new Error(NullFunctionMessage);
5871	<	int b = batch(), c;
5872	<	while (b > 1 && baseIndex != baseLimit && result.get() == null) {
5873	<	do {} while (!casPending(c = pending, c+1));
5874	<	new SearchEntriesTask<K,V,U>(this, b >>>= 1, true,
5875	<	searchFunction, result).fork();
5876	<	}
5877	<	Object v; U u;
5878	<	while (result.get() == null && (v = advance()) != null) {
5879	<	if ((u = searchFunction.apply(entryFor((K)nextKey, (V)v))) != null) {
5880	<	result.compareAndSet(null, u);
5881	<	break;
5865	>	public final U getRawResult() { return result.get(); }
5866	>	@SuppressWarnings("unchecked") public final void compute() {
5867	>	final Fun<Entry<K,V>, ? extends U> searchFunction;
5868	>	final AtomicReference<U> result;
5869	>	if ((searchFunction = this.searchFunction) != null &&
5870	>	(result = this.result) != null) {
5871	>	for (int b;;) {
5872	>	if (result.get() != null)
5873	>	return;
5874	>	if ((b = preSplit()) <= 0)
5875	>	break;
5876	>	new SearchEntriesTask<K,V,U>
5877	>	(map, this, b, searchFunction, result).fork();
5878	>	}
5879	>	while (result.get() == null) {
5880	>	V v; U u;
5881	>	if ((v = advance()) == null) {
5882	>	propagateCompletion();
5883	>	break;
5884	>	}
5885	>	if ((u = searchFunction.apply(entryFor((K)nextKey,
5886	>	v))) != null) {
5887	>	if (result.compareAndSet(null, u))
5888	>	quietlyCompleteRoot();
5889	>	return;
5890	>	}
5891		}
5892		}
5358	–	tryComplete();
5893		}
5360	–	public final U getRawResult() { return result.get(); }
5894		}
5895
5896	<	static final class SearchMappingsTask<K,V,U>
5897	<	extends BulkTask<K,V,U> {
5896	>	@SuppressWarnings("serial") static final class SearchMappingsTask<K,V,U>
5897	>	extends Traverser<K,V,U> {
5898		final BiFun<? super K, ? super V, ? extends U> searchFunction;
5899		final AtomicReference<U> result;
5900		SearchMappingsTask
5901	<	(ConcurrentHashMapV8<K,V> m,
5369	<	BiFun<? super K, ? super V, ? extends U> searchFunction,
5370	<	AtomicReference<U> result) {
5371	<	super(m);
5372	<	this.searchFunction = searchFunction; this.result = result;
5373	<	}
5374	<	SearchMappingsTask
5375	<	(BulkTask<K,V,?> p, int b, boolean split,
5901	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5902		BiFun<? super K, ? super V, ? extends U> searchFunction,
5903		AtomicReference<U> result) {
5904	<	super(p, b, split);
5904	>	super(m, p, b);
5905		this.searchFunction = searchFunction; this.result = result;
5906		}
5907	<	public final void compute() {
5908	<	AtomicReference<U> result = this.result;
5909	<	final BiFun<? super K, ? super V, ? extends U> searchFunction =
5910	<	this.searchFunction;
5911	<	if (searchFunction == null || result == null)
5912	<	throw new Error(NullFunctionMessage);
5913	<	int b = batch(), c;
5914	<	while (b > 1 && baseIndex != baseLimit && result.get() == null) {
5915	<	do {} while (!casPending(c = pending, c+1));
5916	<	new SearchMappingsTask<K,V,U>(this, b >>>= 1, true,
5917	<	searchFunction, result).fork();
5918	<	}
5919	<	Object v; U u;
5920	<	while (result.get() == null && (v = advance()) != null) {
5921	<	if ((u = searchFunction.apply((K)nextKey, (V)v)) != null) {
5922	<	result.compareAndSet(null, u);
5923	<	break;
5907	>	public final U getRawResult() { return result.get(); }
5908	>	@SuppressWarnings("unchecked") public final void compute() {
5909	>	final BiFun<? super K, ? super V, ? extends U> searchFunction;
5910	>	final AtomicReference<U> result;
5911	>	if ((searchFunction = this.searchFunction) != null &&
5912	>	(result = this.result) != null) {
5913	>	for (int b;;) {
5914	>	if (result.get() != null)
5915	>	return;
5916	>	if ((b = preSplit()) <= 0)
5917	>	break;
5918	>	new SearchMappingsTask<K,V,U>
5919	>	(map, this, b, searchFunction, result).fork();
5920	>	}
5921	>	while (result.get() == null) {
5922	>	V v; U u;
5923	>	if ((v = advance()) == null) {
5924	>	propagateCompletion();
5925	>	break;
5926	>	}
5927	>	if ((u = searchFunction.apply((K)nextKey, v)) != null) {
5928	>	if (result.compareAndSet(null, u))
5929	>	quietlyCompleteRoot();
5930	>	break;
5931	>	}
5932		}
5933		}
5400	–	tryComplete();
5934		}
5402	–	public final U getRawResult() { return result.get(); }
5935		}
5936
5937	<	static final class ReduceKeysTask<K,V>
5938	<	extends BulkTask<K,V,K> {
5937	>	@SuppressWarnings("serial") static final class ReduceKeysTask<K,V>
5938	>	extends Traverser<K,V,K> {
5939		final BiFun<? super K, ? super K, ? extends K> reducer;
5940		K result;
5941	<	ReduceKeysTask<K,V> sibling;
5410	<	ReduceKeysTask
5411	<	(ConcurrentHashMapV8<K,V> m,
5412	<	BiFun<? super K, ? super K, ? extends K> reducer) {
5413	<	super(m);
5414	<	this.reducer = reducer;
5415	<	}
5941	>	ReduceKeysTask<K,V> rights, nextRight;
5942		ReduceKeysTask
5943	<	(BulkTask<K,V,?> p, int b, boolean split,
5943	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5944	>	ReduceKeysTask<K,V> nextRight,
5945		BiFun<? super K, ? super K, ? extends K> reducer) {
5946	<	super(p, b, split);
5946	>	super(m, p, b); this.nextRight = nextRight;
5947		this.reducer = reducer;
5948		}
5949	<
5950	<	public final void compute() {
5951	<	ReduceKeysTask<K,V> t = this;
5952	<	final BiFun<? super K, ? super K, ? extends K> reducer =
5953	<	this.reducer;
5954	<	if (reducer == null)
5955	<	throw new Error(NullFunctionMessage);
5956	<	int b = batch();
5957	<	while (b > 1 && t.baseIndex != t.baseLimit) {
5958	<	b >>>= 1;
5959	<	t.pending = 1;
5433	<	ReduceKeysTask<K,V> rt =
5434	<	new ReduceKeysTask<K,V>
5435	<	(t, b, true, reducer);
5436	<	t = new ReduceKeysTask<K,V>
5437	<	(t, b, false, reducer);
5438	<	t.sibling = rt;
5439	<	rt.sibling = t;
5440	<	rt.fork();
5441	<	}
5442	<	K r = null;
5443	<	while (t.advance() != null) {
5444	<	K u = (K)t.nextKey;
5445	<	r = (r == null) ? u : reducer.apply(r, u);
5446	<	}
5447	<	t.result = r;
5448	<	for (;;) {
5449	<	int c; BulkTask<K,V,?> par; ReduceKeysTask<K,V> s, p; K u;
5450	<	if ((par = t.parent) == null ||
5451	<	!(par instanceof ReduceKeysTask)) {
5452	<	t.quietlyComplete();
5453	<	break;
5949	>	public final K getRawResult() { return result; }
5950	>	@SuppressWarnings("unchecked") public final void compute() {
5951	>	final BiFun<? super K, ? super K, ? extends K> reducer;
5952	>	if ((reducer = this.reducer) != null) {
5953	>	for (int b; (b = preSplit()) > 0;)
5954	>	(rights = new ReduceKeysTask<K,V>
5955	>	(map, this, b, rights, reducer)).fork();
5956	>	K r = null;
5957	>	while (advance() != null) {
5958	>	K u = (K)nextKey;
5959	>	r = (r == null) ? u : reducer.apply(r, u);
5960		}
5961	<	else if ((c = (p = (ReduceKeysTask<K,V>)par).pending) == 0) {
5962	<	if ((s = t.sibling) != null && (u = s.result) != null)
5963	<	r = (r == null) ? u : reducer.apply(r, u);
5964	<	(t = p).result = r;
5961	>	result = r;
5962	>	CountedCompleter<?> c;
5963	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
5964	>	ReduceKeysTask<K,V>
5965	>	t = (ReduceKeysTask<K,V>)c,
5966	>	s = t.rights;
5967	>	while (s != null) {
5968	>	K tr, sr;
5969	>	if ((sr = s.result) != null)
5970	>	t.result = (((tr = t.result) == null) ? sr :
5971	>	reducer.apply(tr, sr));
5972	>	s = t.rights = s.nextRight;
5973	>	}
5974		}
5460	–	else if (p.casPending(c, 0))
5461	–	break;
5975		}
5976		}
5464	–	public final K getRawResult() { return result; }
5977		}
5978
5979	<	static final class ReduceValuesTask<K,V>
5980	<	extends BulkTask<K,V,V> {
5979	>	@SuppressWarnings("serial") static final class ReduceValuesTask<K,V>
5980	>	extends Traverser<K,V,V> {
5981		final BiFun<? super V, ? super V, ? extends V> reducer;
5982		V result;
5983	<	ReduceValuesTask<K,V> sibling;
5472	<	ReduceValuesTask
5473	<	(ConcurrentHashMapV8<K,V> m,
5474	<	BiFun<? super V, ? super V, ? extends V> reducer) {
5475	<	super(m);
5476	<	this.reducer = reducer;
5477	<	}
5983	>	ReduceValuesTask<K,V> rights, nextRight;
5984		ReduceValuesTask
5985	<	(BulkTask<K,V,?> p, int b, boolean split,
5985	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5986	>	ReduceValuesTask<K,V> nextRight,
5987		BiFun<? super V, ? super V, ? extends V> reducer) {
5988	<	super(p, b, split);
5988	>	super(m, p, b); this.nextRight = nextRight;
5989		this.reducer = reducer;
5990		}
5991	<
5992	<	public final void compute() {
5993	<	ReduceValuesTask<K,V> t = this;
5994	<	final BiFun<? super V, ? super V, ? extends V> reducer =
5995	<	this.reducer;
5996	<	if (reducer == null)
5997	<	throw new Error(NullFunctionMessage);
5998	<	int b = batch();
5999	<	while (b > 1 && t.baseIndex != t.baseLimit) {
6000	<	b >>>= 1;
6001	<	t.pending = 1;
6002	<	ReduceValuesTask<K,V> rt =
5496	<	new ReduceValuesTask<K,V>
5497	<	(t, b, true, reducer);
5498	<	t = new ReduceValuesTask<K,V>
5499	<	(t, b, false, reducer);
5500	<	t.sibling = rt;
5501	<	rt.sibling = t;
5502	<	rt.fork();
5503	<	}
5504	<	V r = null;
5505	<	Object v;
5506	<	while ((v = t.advance()) != null) {
5507	<	V u = (V)v;
5508	<	r = (r == null) ? u : reducer.apply(r, u);
5509	<	}
5510	<	t.result = r;
5511	<	for (;;) {
5512	<	int c; BulkTask<K,V,?> par; ReduceValuesTask<K,V> s, p; V u;
5513	<	if ((par = t.parent) == null ||
5514	<	!(par instanceof ReduceValuesTask)) {
5515	<	t.quietlyComplete();
5516	<	break;
5991	>	public final V getRawResult() { return result; }
5992	>	@SuppressWarnings("unchecked") public final void compute() {
5993	>	final BiFun<? super V, ? super V, ? extends V> reducer;
5994	>	if ((reducer = this.reducer) != null) {
5995	>	for (int b; (b = preSplit()) > 0;)
5996	>	(rights = new ReduceValuesTask<K,V>
5997	>	(map, this, b, rights, reducer)).fork();
5998	>	V r = null;
5999	>	V v;
6000	>	while ((v = advance()) != null) {
6001	>	V u = v;
6002	>	r = (r == null) ? u : reducer.apply(r, u);
6003		}
6004	<	else if ((c = (p = (ReduceValuesTask<K,V>)par).pending) == 0) {
6005	<	if ((s = t.sibling) != null && (u = s.result) != null)
6006	<	r = (r == null) ? u : reducer.apply(r, u);
6007	<	(t = p).result = r;
6004	>	result = r;
6005	>	CountedCompleter<?> c;
6006	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6007	>	ReduceValuesTask<K,V>
6008	>	t = (ReduceValuesTask<K,V>)c,
6009	>	s = t.rights;
6010	>	while (s != null) {
6011	>	V tr, sr;
6012	>	if ((sr = s.result) != null)
6013	>	t.result = (((tr = t.result) == null) ? sr :
6014	>	reducer.apply(tr, sr));
6015	>	s = t.rights = s.nextRight;
6016	>	}
6017		}
5523	–	else if (p.casPending(c, 0))
5524	–	break;
6018		}
6019		}
5527	–	public final V getRawResult() { return result; }
6020		}
6021
6022	<	static final class ReduceEntriesTask<K,V>
6023	<	extends BulkTask<K,V,Map.Entry<K,V>> {
6022	>	@SuppressWarnings("serial") static final class ReduceEntriesTask<K,V>
6023	>	extends Traverser<K,V,Map.Entry<K,V>> {
6024		final BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer;
6025		Map.Entry<K,V> result;
6026	<	ReduceEntriesTask<K,V> sibling;
6026	>	ReduceEntriesTask<K,V> rights, nextRight;
6027		ReduceEntriesTask
6028	<	(ConcurrentHashMapV8<K,V> m,
6028	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6029	>	ReduceEntriesTask<K,V> nextRight,
6030		BiFun<Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
6031	<	super(m);
5539	<	this.reducer = reducer;
5540	<	}
5541	<	ReduceEntriesTask
5542	<	(BulkTask<K,V,?> p, int b, boolean split,
5543	<	BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
5544	<	super(p, b, split);
6031	>	super(m, p, b); this.nextRight = nextRight;
6032		this.reducer = reducer;
6033		}
6034	<
6035	<	public final void compute() {
6036	<	ReduceEntriesTask<K,V> t = this;
6037	<	final BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer =
6038	<	this.reducer;
6039	<	if (reducer == null)
6040	<	throw new Error(NullFunctionMessage);
6041	<	int b = batch();
6042	<	while (b > 1 && t.baseIndex != t.baseLimit) {
6043	<	b >>>= 1;
6044	<	t.pending = 1;
6045	<	ReduceEntriesTask<K,V> rt =
5559	<	new ReduceEntriesTask<K,V>
5560	<	(t, b, true, reducer);
5561	<	t = new ReduceEntriesTask<K,V>
5562	<	(t, b, false, reducer);
5563	<	t.sibling = rt;
5564	<	rt.sibling = t;
5565	<	rt.fork();
5566	<	}
5567	<	Map.Entry<K,V> r = null;
5568	<	Object v;
5569	<	while ((v = t.advance()) != null) {
5570	<	Map.Entry<K,V> u = entryFor((K)t.nextKey, (V)v);
5571	<	r = (r == null) ? u : reducer.apply(r, u);
5572	<	}
5573	<	t.result = r;
5574	<	for (;;) {
5575	<	int c; BulkTask<K,V,?> par; ReduceEntriesTask<K,V> s, p;
5576	<	Map.Entry<K,V> u;
5577	<	if ((par = t.parent) == null ||
5578	<	!(par instanceof ReduceEntriesTask)) {
5579	<	t.quietlyComplete();
5580	<	break;
6034	>	public final Map.Entry<K,V> getRawResult() { return result; }
6035	>	@SuppressWarnings("unchecked") public final void compute() {
6036	>	final BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer;
6037	>	if ((reducer = this.reducer) != null) {
6038	>	for (int b; (b = preSplit()) > 0;)
6039	>	(rights = new ReduceEntriesTask<K,V>
6040	>	(map, this, b, rights, reducer)).fork();
6041	>	Map.Entry<K,V> r = null;
6042	>	V v;
6043	>	while ((v = advance()) != null) {
6044	>	Map.Entry<K,V> u = entryFor((K)nextKey, v);
6045	>	r = (r == null) ? u : reducer.apply(r, u);
6046		}
6047	<	else if ((c = (p = (ReduceEntriesTask<K,V>)par).pending) == 0) {
6048	<	if ((s = t.sibling) != null && (u = s.result) != null)
6049	<	r = (r == null) ? u : reducer.apply(r, u);
6050	<	(t = p).result = r;
6047	>	result = r;
6048	>	CountedCompleter<?> c;
6049	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6050	>	ReduceEntriesTask<K,V>
6051	>	t = (ReduceEntriesTask<K,V>)c,
6052	>	s = t.rights;
6053	>	while (s != null) {
6054	>	Map.Entry<K,V> tr, sr;
6055	>	if ((sr = s.result) != null)
6056	>	t.result = (((tr = t.result) == null) ? sr :
6057	>	reducer.apply(tr, sr));
6058	>	s = t.rights = s.nextRight;
6059	>	}
6060		}
5587	–	else if (p.casPending(c, 0))
5588	–	break;
6061		}
6062		}
5591	–	public final Map.Entry<K,V> getRawResult() { return result; }
6063		}
6064
6065	<	static final class MapReduceKeysTask<K,V,U>
6066	<	extends BulkTask<K,V,U> {
6065	>	@SuppressWarnings("serial") static final class MapReduceKeysTask<K,V,U>
6066	>	extends Traverser<K,V,U> {
6067		final Fun<? super K, ? extends U> transformer;
6068		final BiFun<? super U, ? super U, ? extends U> reducer;
6069		U result;
6070	<	MapReduceKeysTask<K,V,U> sibling;
5600	<	MapReduceKeysTask
5601	<	(ConcurrentHashMapV8<K,V> m,
5602	<	Fun<? super K, ? extends U> transformer,
5603	<	BiFun<? super U, ? super U, ? extends U> reducer) {
5604	<	super(m);
5605	<	this.transformer = transformer;
5606	<	this.reducer = reducer;
5607	<	}
6070	>	MapReduceKeysTask<K,V,U> rights, nextRight;
6071		MapReduceKeysTask
6072	<	(BulkTask<K,V,?> p, int b, boolean split,
6072	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6073	>	MapReduceKeysTask<K,V,U> nextRight,
6074		Fun<? super K, ? extends U> transformer,
6075		BiFun<? super U, ? super U, ? extends U> reducer) {
6076	<	super(p, b, split);
6076	>	super(m, p, b); this.nextRight = nextRight;
6077		this.transformer = transformer;
6078		this.reducer = reducer;
6079		}
6080	<	public final void compute() {
6081	<	MapReduceKeysTask<K,V,U> t = this;
6082	<	final Fun<? super K, ? extends U> transformer =
6083	<	this.transformer;
6084	<	final BiFun<? super U, ? super U, ? extends U> reducer =
6085	<	this.reducer;
6086	<	if (transformer == null || reducer == null)
6087	<	throw new Error(NullFunctionMessage);
6088	<	int b = batch();
6089	<	while (b > 1 && t.baseIndex != t.baseLimit) {
6090	<	b >>>= 1;
6091	<	t.pending = 1;
5628	<	MapReduceKeysTask<K,V,U> rt =
5629	<	new MapReduceKeysTask<K,V,U>
5630	<	(t, b, true, transformer, reducer);
5631	<	t = new MapReduceKeysTask<K,V,U>
5632	<	(t, b, false, transformer, reducer);
5633	<	t.sibling = rt;
5634	<	rt.sibling = t;
5635	<	rt.fork();
5636	<	}
5637	<	U r = null, u;
5638	<	while (t.advance() != null) {
5639	<	if ((u = transformer.apply((K)t.nextKey)) != null)
5640	<	r = (r == null) ? u : reducer.apply(r, u);
5641	<	}
5642	<	t.result = r;
5643	<	for (;;) {
5644	<	int c; BulkTask<K,V,?> par; MapReduceKeysTask<K,V,U> s, p;
5645	<	if ((par = t.parent) == null ||
5646	<	!(par instanceof MapReduceKeysTask)) {
5647	<	t.quietlyComplete();
5648	<	break;
5649	<	}
5650	<	else if ((c = (p = (MapReduceKeysTask<K,V,U>)par).pending) == 0) {
5651	<	if ((s = t.sibling) != null && (u = s.result) != null)
6080	>	public final U getRawResult() { return result; }
6081	>	@SuppressWarnings("unchecked") public final void compute() {
6082	>	final Fun<? super K, ? extends U> transformer;
6083	>	final BiFun<? super U, ? super U, ? extends U> reducer;
6084	>	if ((transformer = this.transformer) != null &&
6085	>	(reducer = this.reducer) != null) {
6086	>	for (int b; (b = preSplit()) > 0;)
6087	>	(rights = new MapReduceKeysTask<K,V,U>
6088	>	(map, this, b, rights, transformer, reducer)).fork();
6089	>	U r = null, u;
6090	>	while (advance() != null) {
6091	>	if ((u = transformer.apply((K)nextKey)) != null)
6092		r = (r == null) ? u : reducer.apply(r, u);
5653	–	(t = p).result = r;
6093		}
6094	<	else if (p.casPending(c, 0))
6095	<	break;
6094	>	result = r;
6095	>	CountedCompleter<?> c;
6096	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6097	>	MapReduceKeysTask<K,V,U>
6098	>	t = (MapReduceKeysTask<K,V,U>)c,
6099	>	s = t.rights;
6100	>	while (s != null) {
6101	>	U tr, sr;
6102	>	if ((sr = s.result) != null)
6103	>	t.result = (((tr = t.result) == null) ? sr :
6104	>	reducer.apply(tr, sr));
6105	>	s = t.rights = s.nextRight;
6106	>	}
6107	>	}
6108		}
6109		}
5659	–	public final U getRawResult() { return result; }
6110		}
6111
6112	<	static final class MapReduceValuesTask<K,V,U>
6113	<	extends BulkTask<K,V,U> {
6112	>	@SuppressWarnings("serial") static final class MapReduceValuesTask<K,V,U>
6113	>	extends Traverser<K,V,U> {
6114		final Fun<? super V, ? extends U> transformer;
6115		final BiFun<? super U, ? super U, ? extends U> reducer;
6116		U result;
6117	<	MapReduceValuesTask<K,V,U> sibling;
5668	<	MapReduceValuesTask
5669	<	(ConcurrentHashMapV8<K,V> m,
5670	<	Fun<? super V, ? extends U> transformer,
5671	<	BiFun<? super U, ? super U, ? extends U> reducer) {
5672	<	super(m);
5673	<	this.transformer = transformer;
5674	<	this.reducer = reducer;
5675	<	}
6117	>	MapReduceValuesTask<K,V,U> rights, nextRight;
6118		MapReduceValuesTask
6119	<	(BulkTask<K,V,?> p, int b, boolean split,
6119	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6120	>	MapReduceValuesTask<K,V,U> nextRight,
6121		Fun<? super V, ? extends U> transformer,
6122		BiFun<? super U, ? super U, ? extends U> reducer) {
6123	<	super(p, b, split);
6123	>	super(m, p, b); this.nextRight = nextRight;
6124		this.transformer = transformer;
6125		this.reducer = reducer;
6126		}
6127	<	public final void compute() {
6128	<	MapReduceValuesTask<K,V,U> t = this;
6129	<	final Fun<? super V, ? extends U> transformer =
6130	<	this.transformer;
6131	<	final BiFun<? super U, ? super U, ? extends U> reducer =
6132	<	this.reducer;
6133	<	if (transformer == null || reducer == null)
6134	<	throw new Error(NullFunctionMessage);
6135	<	int b = batch();
6136	<	while (b > 1 && t.baseIndex != t.baseLimit) {
6137	<	b >>>= 1;
6138	<	t.pending = 1;
6139	<	MapReduceValuesTask<K,V,U> rt =
5697	<	new MapReduceValuesTask<K,V,U>
5698	<	(t, b, true, transformer, reducer);
5699	<	t = new MapReduceValuesTask<K,V,U>
5700	<	(t, b, false, transformer, reducer);
5701	<	t.sibling = rt;
5702	<	rt.sibling = t;
5703	<	rt.fork();
5704	<	}
5705	<	U r = null, u;
5706	<	Object v;
5707	<	while ((v = t.advance()) != null) {
5708	<	if ((u = transformer.apply((V)v)) != null)
5709	<	r = (r == null) ? u : reducer.apply(r, u);
5710	<	}
5711	<	t.result = r;
5712	<	for (;;) {
5713	<	int c; BulkTask<K,V,?> par; MapReduceValuesTask<K,V,U> s, p;
5714	<	if ((par = t.parent) == null ||
5715	<	!(par instanceof MapReduceValuesTask)) {
5716	<	t.quietlyComplete();
5717	<	break;
5718	<	}
5719	<	else if ((c = (p = (MapReduceValuesTask<K,V,U>)par).pending) == 0) {
5720	<	if ((s = t.sibling) != null && (u = s.result) != null)
6127	>	public final U getRawResult() { return result; }
6128	>	@SuppressWarnings("unchecked") public final void compute() {
6129	>	final Fun<? super V, ? extends U> transformer;
6130	>	final BiFun<? super U, ? super U, ? extends U> reducer;
6131	>	if ((transformer = this.transformer) != null &&
6132	>	(reducer = this.reducer) != null) {
6133	>	for (int b; (b = preSplit()) > 0;)
6134	>	(rights = new MapReduceValuesTask<K,V,U>
6135	>	(map, this, b, rights, transformer, reducer)).fork();
6136	>	U r = null, u;
6137	>	V v;
6138	>	while ((v = advance()) != null) {
6139	>	if ((u = transformer.apply(v)) != null)
6140		r = (r == null) ? u : reducer.apply(r, u);
5722	–	(t = p).result = r;
6141		}
6142	<	else if (p.casPending(c, 0))
6143	<	break;
6142	>	result = r;
6143	>	CountedCompleter<?> c;
6144	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6145	>	MapReduceValuesTask<K,V,U>
6146	>	t = (MapReduceValuesTask<K,V,U>)c,
6147	>	s = t.rights;
6148	>	while (s != null) {
6149	>	U tr, sr;
6150	>	if ((sr = s.result) != null)
6151	>	t.result = (((tr = t.result) == null) ? sr :
6152	>	reducer.apply(tr, sr));
6153	>	s = t.rights = s.nextRight;
6154	>	}
6155	>	}
6156		}
6157		}
5728	–	public final U getRawResult() { return result; }
6158		}
6159
6160	<	static final class MapReduceEntriesTask<K,V,U>
6161	<	extends BulkTask<K,V,U> {
6160	>	@SuppressWarnings("serial") static final class MapReduceEntriesTask<K,V,U>
6161	>	extends Traverser<K,V,U> {
6162		final Fun<Map.Entry<K,V>, ? extends U> transformer;
6163		final BiFun<? super U, ? super U, ? extends U> reducer;
6164		U result;
6165	<	MapReduceEntriesTask<K,V,U> sibling;
5737	<	MapReduceEntriesTask
5738	<	(ConcurrentHashMapV8<K,V> m,
5739	<	Fun<Map.Entry<K,V>, ? extends U> transformer,
5740	<	BiFun<? super U, ? super U, ? extends U> reducer) {
5741	<	super(m);
5742	<	this.transformer = transformer;
5743	<	this.reducer = reducer;
5744	<	}
6165	>	MapReduceEntriesTask<K,V,U> rights, nextRight;
6166		MapReduceEntriesTask
6167	<	(BulkTask<K,V,?> p, int b, boolean split,
6167	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6168	>	MapReduceEntriesTask<K,V,U> nextRight,
6169		Fun<Map.Entry<K,V>, ? extends U> transformer,
6170		BiFun<? super U, ? super U, ? extends U> reducer) {
6171	<	super(p, b, split);
6171	>	super(m, p, b); this.nextRight = nextRight;
6172		this.transformer = transformer;
6173		this.reducer = reducer;
6174		}
6175	<	public final void compute() {
6176	<	MapReduceEntriesTask<K,V,U> t = this;
6177	<	final Fun<Map.Entry<K,V>, ? extends U> transformer =
6178	<	this.transformer;
6179	<	final BiFun<? super U, ? super U, ? extends U> reducer =
6180	<	this.reducer;
6181	<	if (transformer == null || reducer == null)
6182	<	throw new Error(NullFunctionMessage);
6183	<	int b = batch();
6184	<	while (b > 1 && t.baseIndex != t.baseLimit) {
6185	<	b >>>= 1;
6186	<	t.pending = 1;
6187	<	MapReduceEntriesTask<K,V,U> rt =
6188	<	new MapReduceEntriesTask<K,V,U>
5767	<	(t, b, true, transformer, reducer);
5768	<	t = new MapReduceEntriesTask<K,V,U>
5769	<	(t, b, false, transformer, reducer);
5770	<	t.sibling = rt;
5771	<	rt.sibling = t;
5772	<	rt.fork();
5773	<	}
5774	<	U r = null, u;
5775	<	Object v;
5776	<	while ((v = t.advance()) != null) {
5777	<	if ((u = transformer.apply(entryFor((K)t.nextKey, (V)v))) != null)
5778	<	r = (r == null) ? u : reducer.apply(r, u);
5779	<	}
5780	<	t.result = r;
5781	<	for (;;) {
5782	<	int c; BulkTask<K,V,?> par; MapReduceEntriesTask<K,V,U> s, p;
5783	<	if ((par = t.parent) == null ||
5784	<	!(par instanceof MapReduceEntriesTask)) {
5785	<	t.quietlyComplete();
5786	<	break;
5787	<	}
5788	<	else if ((c = (p = (MapReduceEntriesTask<K,V,U>)par).pending) == 0) {
5789	<	if ((s = t.sibling) != null && (u = s.result) != null)
6175	>	public final U getRawResult() { return result; }
6176	>	@SuppressWarnings("unchecked") public final void compute() {
6177	>	final Fun<Map.Entry<K,V>, ? extends U> transformer;
6178	>	final BiFun<? super U, ? super U, ? extends U> reducer;
6179	>	if ((transformer = this.transformer) != null &&
6180	>	(reducer = this.reducer) != null) {
6181	>	for (int b; (b = preSplit()) > 0;)
6182	>	(rights = new MapReduceEntriesTask<K,V,U>
6183	>	(map, this, b, rights, transformer, reducer)).fork();
6184	>	U r = null, u;
6185	>	V v;
6186	>	while ((v = advance()) != null) {
6187	>	if ((u = transformer.apply(entryFor((K)nextKey,
6188	>	v))) != null)
6189		r = (r == null) ? u : reducer.apply(r, u);
5791	–	(t = p).result = r;
6190		}
6191	<	else if (p.casPending(c, 0))
6192	<	break;
6191	>	result = r;
6192	>	CountedCompleter<?> c;
6193	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6194	>	MapReduceEntriesTask<K,V,U>
6195	>	t = (MapReduceEntriesTask<K,V,U>)c,
6196	>	s = t.rights;
6197	>	while (s != null) {
6198	>	U tr, sr;
6199	>	if ((sr = s.result) != null)
6200	>	t.result = (((tr = t.result) == null) ? sr :
6201	>	reducer.apply(tr, sr));
6202	>	s = t.rights = s.nextRight;
6203	>	}
6204	>	}
6205		}
6206		}
5797	–	public final U getRawResult() { return result; }
6207		}
6208
6209	<	static final class MapReduceMappingsTask<K,V,U>
6210	<	extends BulkTask<K,V,U> {
6209	>	@SuppressWarnings("serial") static final class MapReduceMappingsTask<K,V,U>
6210	>	extends Traverser<K,V,U> {
6211		final BiFun<? super K, ? super V, ? extends U> transformer;
6212		final BiFun<? super U, ? super U, ? extends U> reducer;
6213		U result;
6214	<	MapReduceMappingsTask<K,V,U> sibling;
5806	<	MapReduceMappingsTask
5807	<	(ConcurrentHashMapV8<K,V> m,
5808	<	BiFun<? super K, ? super V, ? extends U> transformer,
5809	<	BiFun<? super U, ? super U, ? extends U> reducer) {
5810	<	super(m);
5811	<	this.transformer = transformer;
5812	<	this.reducer = reducer;
5813	<	}
6214	>	MapReduceMappingsTask<K,V,U> rights, nextRight;
6215		MapReduceMappingsTask
6216	<	(BulkTask<K,V,?> p, int b, boolean split,
6216	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6217	>	MapReduceMappingsTask<K,V,U> nextRight,
6218		BiFun<? super K, ? super V, ? extends U> transformer,
6219		BiFun<? super U, ? super U, ? extends U> reducer) {
6220	<	super(p, b, split);
6220	>	super(m, p, b); this.nextRight = nextRight;
6221		this.transformer = transformer;
6222		this.reducer = reducer;
6223		}
6224	<	public final void compute() {
6225	<	MapReduceMappingsTask<K,V,U> t = this;
6226	<	final BiFun<? super K, ? super V, ? extends U> transformer =
6227	<	this.transformer;
6228	<	final BiFun<? super U, ? super U, ? extends U> reducer =
6229	<	this.reducer;
6230	<	if (transformer == null || reducer == null)
6231	<	throw new Error(NullFunctionMessage);
6232	<	int b = batch();
6233	<	while (b > 1 && t.baseIndex != t.baseLimit) {
6234	<	b >>>= 1;
6235	<	t.pending = 1;
6236	<	MapReduceMappingsTask<K,V,U> rt =
5835	<	new MapReduceMappingsTask<K,V,U>
5836	<	(t, b, true, transformer, reducer);
5837	<	t = new MapReduceMappingsTask<K,V,U>
5838	<	(t, b, false, transformer, reducer);
5839	<	t.sibling = rt;
5840	<	rt.sibling = t;
5841	<	rt.fork();
5842	<	}
5843	<	U r = null, u;
5844	<	Object v;
5845	<	while ((v = t.advance()) != null) {
5846	<	if ((u = transformer.apply((K)t.nextKey, (V)v)) != null)
5847	<	r = (r == null) ? u : reducer.apply(r, u);
5848	<	}
5849	<	for (;;) {
5850	<	int c; BulkTask<K,V,?> par; MapReduceMappingsTask<K,V,U> s, p;
5851	<	if ((par = t.parent) == null ||
5852	<	!(par instanceof MapReduceMappingsTask)) {
5853	<	t.quietlyComplete();
5854	<	break;
5855	<	}
5856	<	else if ((c = (p = (MapReduceMappingsTask<K,V,U>)par).pending) == 0) {
5857	<	if ((s = t.sibling) != null && (u = s.result) != null)
6224	>	public final U getRawResult() { return result; }
6225	>	@SuppressWarnings("unchecked") public final void compute() {
6226	>	final BiFun<? super K, ? super V, ? extends U> transformer;
6227	>	final BiFun<? super U, ? super U, ? extends U> reducer;
6228	>	if ((transformer = this.transformer) != null &&
6229	>	(reducer = this.reducer) != null) {
6230	>	for (int b; (b = preSplit()) > 0;)
6231	>	(rights = new MapReduceMappingsTask<K,V,U>
6232	>	(map, this, b, rights, transformer, reducer)).fork();
6233	>	U r = null, u;
6234	>	V v;
6235	>	while ((v = advance()) != null) {
6236	>	if ((u = transformer.apply((K)nextKey, v)) != null)
6237		r = (r == null) ? u : reducer.apply(r, u);
5859	–	(t = p).result = r;
6238		}
6239	<	else if (p.casPending(c, 0))
6240	<	break;
6239	>	result = r;
6240	>	CountedCompleter<?> c;
6241	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6242	>	MapReduceMappingsTask<K,V,U>
6243	>	t = (MapReduceMappingsTask<K,V,U>)c,
6244	>	s = t.rights;
6245	>	while (s != null) {
6246	>	U tr, sr;
6247	>	if ((sr = s.result) != null)
6248	>	t.result = (((tr = t.result) == null) ? sr :
6249	>	reducer.apply(tr, sr));
6250	>	s = t.rights = s.nextRight;
6251	>	}
6252	>	}
6253		}
6254		}
5865	–	public final U getRawResult() { return result; }
6255		}
6256
6257	<	static final class MapReduceKeysToDoubleTask<K,V>
6258	<	extends BulkTask<K,V,Double> {
6257	>	@SuppressWarnings("serial") static final class MapReduceKeysToDoubleTask<K,V>
6258	>	extends Traverser<K,V,Double> {
6259		final ObjectToDouble<? super K> transformer;
6260		final DoubleByDoubleToDouble reducer;
6261		final double basis;
6262		double result;
6263	<	MapReduceKeysToDoubleTask<K,V> sibling;
5875	<	MapReduceKeysToDoubleTask
5876	<	(ConcurrentHashMapV8<K,V> m,
5877	<	ObjectToDouble<? super K> transformer,
5878	<	double basis,
5879	<	DoubleByDoubleToDouble reducer) {
5880	<	super(m);
5881	<	this.transformer = transformer;
5882	<	this.basis = basis; this.reducer = reducer;
5883	<	}
6263	>	MapReduceKeysToDoubleTask<K,V> rights, nextRight;
6264		MapReduceKeysToDoubleTask
6265	<	(BulkTask<K,V,?> p, int b, boolean split,
6265	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6266	>	MapReduceKeysToDoubleTask<K,V> nextRight,
6267		ObjectToDouble<? super K> transformer,
6268		double basis,
6269		DoubleByDoubleToDouble reducer) {
6270	<	super(p, b, split);
6270	>	super(m, p, b); this.nextRight = nextRight;
6271		this.transformer = transformer;
6272		this.basis = basis; this.reducer = reducer;
6273		}
6274	<	public final void compute() {
6275	<	MapReduceKeysToDoubleTask<K,V> t = this;
6276	<	final ObjectToDouble<? super K> transformer =
6277	<	this.transformer;
6278	<	final DoubleByDoubleToDouble reducer = this.reducer;
6279	<	if (transformer == null || reducer == null)
6280	<	throw new Error(NullFunctionMessage);
6281	<	final double id = this.basis;
6282	<	int b = batch();
6283	<	while (b > 1 && t.baseIndex != t.baseLimit) {
6284	<	b >>>= 1;
6285	<	t.pending = 1;
6286	<	MapReduceKeysToDoubleTask<K,V> rt =
6287	<	new MapReduceKeysToDoubleTask<K,V>
6288	<	(t, b, true, transformer, id, reducer);
6289	<	t = new MapReduceKeysToDoubleTask<K,V>
6290	<	(t, b, false, transformer, id, reducer);
6291	<	t.sibling = rt;
6292	<	rt.sibling = t;
6293	<	rt.fork();
6294	<	}
6295	<	double r = id;
5915	<	while (t.advance() != null)
5916	<	r = reducer.apply(r, transformer.apply((K)t.nextKey));
5917	<	t.result = r;
5918	<	for (;;) {
5919	<	int c; BulkTask<K,V,?> par; MapReduceKeysToDoubleTask<K,V> s, p;
5920	<	if ((par = t.parent) == null ||
5921	<	!(par instanceof MapReduceKeysToDoubleTask)) {
5922	<	t.quietlyComplete();
5923	<	break;
5924	<	}
5925	<	else if ((c = (p = (MapReduceKeysToDoubleTask<K,V>)par).pending) == 0) {
5926	<	if ((s = t.sibling) != null)
5927	<	r = reducer.apply(r, s.result);
5928	<	(t = p).result = r;
6274	>	public final Double getRawResult() { return result; }
6275	>	@SuppressWarnings("unchecked") public final void compute() {
6276	>	final ObjectToDouble<? super K> transformer;
6277	>	final DoubleByDoubleToDouble reducer;
6278	>	if ((transformer = this.transformer) != null &&
6279	>	(reducer = this.reducer) != null) {
6280	>	double r = this.basis;
6281	>	for (int b; (b = preSplit()) > 0;)
6282	>	(rights = new MapReduceKeysToDoubleTask<K,V>
6283	>	(map, this, b, rights, transformer, r, reducer)).fork();
6284	>	while (advance() != null)
6285	>	r = reducer.apply(r, transformer.apply((K)nextKey));
6286	>	result = r;
6287	>	CountedCompleter<?> c;
6288	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6289	>	MapReduceKeysToDoubleTask<K,V>
6290	>	t = (MapReduceKeysToDoubleTask<K,V>)c,
6291	>	s = t.rights;
6292	>	while (s != null) {
6293	>	t.result = reducer.apply(t.result, s.result);
6294	>	s = t.rights = s.nextRight;
6295	>	}
6296		}
5930	–	else if (p.casPending(c, 0))
5931	–	break;
6297		}
6298		}
5934	–	public final Double getRawResult() { return result; }
6299		}
6300
6301	<	static final class MapReduceValuesToDoubleTask<K,V>
6302	<	extends BulkTask<K,V,Double> {
6301	>	@SuppressWarnings("serial") static final class MapReduceValuesToDoubleTask<K,V>
6302	>	extends Traverser<K,V,Double> {
6303		final ObjectToDouble<? super V> transformer;
6304		final DoubleByDoubleToDouble reducer;
6305		final double basis;
6306		double result;
6307	<	MapReduceValuesToDoubleTask<K,V> sibling;
5944	<	MapReduceValuesToDoubleTask
5945	<	(ConcurrentHashMapV8<K,V> m,
5946	<	ObjectToDouble<? super V> transformer,
5947	<	double basis,
5948	<	DoubleByDoubleToDouble reducer) {
5949	<	super(m);
5950	<	this.transformer = transformer;
5951	<	this.basis = basis; this.reducer = reducer;
5952	<	}
6307	>	MapReduceValuesToDoubleTask<K,V> rights, nextRight;
6308		MapReduceValuesToDoubleTask
6309	<	(BulkTask<K,V,?> p, int b, boolean split,
6309	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6310	>	MapReduceValuesToDoubleTask<K,V> nextRight,
6311		ObjectToDouble<? super V> transformer,
6312		double basis,
6313		DoubleByDoubleToDouble reducer) {
6314	<	super(p, b, split);
6314	>	super(m, p, b); this.nextRight = nextRight;
6315		this.transformer = transformer;
6316		this.basis = basis; this.reducer = reducer;
6317		}
6318	<	public final void compute() {
6319	<	MapReduceValuesToDoubleTask<K,V> t = this;
6320	<	final ObjectToDouble<? super V> transformer =
6321	<	this.transformer;
6322	<	final DoubleByDoubleToDouble reducer = this.reducer;
6323	<	if (transformer == null || reducer == null)
6324	<	throw new Error(NullFunctionMessage);
6325	<	final double id = this.basis;
6326	<	int b = batch();
6327	<	while (b > 1 && t.baseIndex != t.baseLimit) {
6328	<	b >>>= 1;
6329	<	t.pending = 1;
6330	<	MapReduceValuesToDoubleTask<K,V> rt =
6331	<	new MapReduceValuesToDoubleTask<K,V>
6332	<	(t, b, true, transformer, id, reducer);
6333	<	t = new MapReduceValuesToDoubleTask<K,V>
6334	<	(t, b, false, transformer, id, reducer);
6335	<	t.sibling = rt;
6336	<	rt.sibling = t;
6337	<	rt.fork();
6338	<	}
6339	<	double r = id;
6340	<	Object v;
5985	<	while ((v = t.advance()) != null)
5986	<	r = reducer.apply(r, transformer.apply((V)v));
5987	<	t.result = r;
5988	<	for (;;) {
5989	<	int c; BulkTask<K,V,?> par; MapReduceValuesToDoubleTask<K,V> s, p;
5990	<	if ((par = t.parent) == null ||
5991	<	!(par instanceof MapReduceValuesToDoubleTask)) {
5992	<	t.quietlyComplete();
5993	<	break;
5994	<	}
5995	<	else if ((c = (p = (MapReduceValuesToDoubleTask<K,V>)par).pending) == 0) {
5996	<	if ((s = t.sibling) != null)
5997	<	r = reducer.apply(r, s.result);
5998	<	(t = p).result = r;
6318	>	public final Double getRawResult() { return result; }
6319	>	@SuppressWarnings("unchecked") public final void compute() {
6320	>	final ObjectToDouble<? super V> transformer;
6321	>	final DoubleByDoubleToDouble reducer;
6322	>	if ((transformer = this.transformer) != null &&
6323	>	(reducer = this.reducer) != null) {
6324	>	double r = this.basis;
6325	>	for (int b; (b = preSplit()) > 0;)
6326	>	(rights = new MapReduceValuesToDoubleTask<K,V>
6327	>	(map, this, b, rights, transformer, r, reducer)).fork();
6328	>	V v;
6329	>	while ((v = advance()) != null)
6330	>	r = reducer.apply(r, transformer.apply(v));
6331	>	result = r;
6332	>	CountedCompleter<?> c;
6333	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6334	>	MapReduceValuesToDoubleTask<K,V>
6335	>	t = (MapReduceValuesToDoubleTask<K,V>)c,
6336	>	s = t.rights;
6337	>	while (s != null) {
6338	>	t.result = reducer.apply(t.result, s.result);
6339	>	s = t.rights = s.nextRight;
6340	>	}
6341		}
6000	–	else if (p.casPending(c, 0))
6001	–	break;
6342		}
6343		}
6004	–	public final Double getRawResult() { return result; }
6344		}
6345
6346	<	static final class MapReduceEntriesToDoubleTask<K,V>
6347	<	extends BulkTask<K,V,Double> {
6346	>	@SuppressWarnings("serial") static final class MapReduceEntriesToDoubleTask<K,V>
6347	>	extends Traverser<K,V,Double> {
6348		final ObjectToDouble<Map.Entry<K,V>> transformer;
6349		final DoubleByDoubleToDouble reducer;
6350		final double basis;
6351		double result;
6352	<	MapReduceEntriesToDoubleTask<K,V> sibling;
6014	<	MapReduceEntriesToDoubleTask
6015	<	(ConcurrentHashMapV8<K,V> m,
6016	<	ObjectToDouble<Map.Entry<K,V>> transformer,
6017	<	double basis,
6018	<	DoubleByDoubleToDouble reducer) {
6019	<	super(m);
6020	<	this.transformer = transformer;
6021	<	this.basis = basis; this.reducer = reducer;
6022	<	}
6352	>	MapReduceEntriesToDoubleTask<K,V> rights, nextRight;
6353		MapReduceEntriesToDoubleTask
6354	<	(BulkTask<K,V,?> p, int b, boolean split,
6354	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6355	>	MapReduceEntriesToDoubleTask<K,V> nextRight,
6356		ObjectToDouble<Map.Entry<K,V>> transformer,
6357		double basis,
6358		DoubleByDoubleToDouble reducer) {
6359	<	super(p, b, split);
6359	>	super(m, p, b); this.nextRight = nextRight;
6360		this.transformer = transformer;
6361		this.basis = basis; this.reducer = reducer;
6362		}
6363	<	public final void compute() {
6364	<	MapReduceEntriesToDoubleTask<K,V> t = this;
6365	<	final ObjectToDouble<Map.Entry<K,V>> transformer =
6366	<	this.transformer;
6367	<	final DoubleByDoubleToDouble reducer = this.reducer;
6368	<	if (transformer == null || reducer == null)
6369	<	throw new Error(NullFunctionMessage);
6370	<	final double id = this.basis;
6371	<	int b = batch();
6372	<	while (b > 1 && t.baseIndex != t.baseLimit) {
6373	<	b >>>= 1;
6374	<	t.pending = 1;
6375	<	MapReduceEntriesToDoubleTask<K,V> rt =
6376	<	new MapReduceEntriesToDoubleTask<K,V>
6377	<	(t, b, true, transformer, id, reducer);
6378	<	t = new MapReduceEntriesToDoubleTask<K,V>
6379	<	(t, b, false, transformer, id, reducer);
6380	<	t.sibling = rt;
6381	<	rt.sibling = t;
6382	<	rt.fork();
6383	<	}
6384	<	double r = id;
6385	<	Object v;
6386	<	while ((v = t.advance()) != null)
6056	<	r = reducer.apply(r, transformer.apply(entryFor((K)t.nextKey, (V)v)));
6057	<	t.result = r;
6058	<	for (;;) {
6059	<	int c; BulkTask<K,V,?> par; MapReduceEntriesToDoubleTask<K,V> s, p;
6060	<	if ((par = t.parent) == null ||
6061	<	!(par instanceof MapReduceEntriesToDoubleTask)) {
6062	<	t.quietlyComplete();
6063	<	break;
6064	<	}
6065	<	else if ((c = (p = (MapReduceEntriesToDoubleTask<K,V>)par).pending) == 0) {
6066	<	if ((s = t.sibling) != null)
6067	<	r = reducer.apply(r, s.result);
6068	<	(t = p).result = r;
6363	>	public final Double getRawResult() { return result; }
6364	>	@SuppressWarnings("unchecked") public final void compute() {
6365	>	final ObjectToDouble<Map.Entry<K,V>> transformer;
6366	>	final DoubleByDoubleToDouble reducer;
6367	>	if ((transformer = this.transformer) != null &&
6368	>	(reducer = this.reducer) != null) {
6369	>	double r = this.basis;
6370	>	for (int b; (b = preSplit()) > 0;)
6371	>	(rights = new MapReduceEntriesToDoubleTask<K,V>
6372	>	(map, this, b, rights, transformer, r, reducer)).fork();
6373	>	V v;
6374	>	while ((v = advance()) != null)
6375	>	r = reducer.apply(r, transformer.apply(entryFor((K)nextKey,
6376	>	v)));
6377	>	result = r;
6378	>	CountedCompleter<?> c;
6379	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6380	>	MapReduceEntriesToDoubleTask<K,V>
6381	>	t = (MapReduceEntriesToDoubleTask<K,V>)c,
6382	>	s = t.rights;
6383	>	while (s != null) {
6384	>	t.result = reducer.apply(t.result, s.result);
6385	>	s = t.rights = s.nextRight;
6386	>	}
6387		}
6070	–	else if (p.casPending(c, 0))
6071	–	break;
6388		}
6389		}
6074	–	public final Double getRawResult() { return result; }
6390		}
6391
6392	<	static final class MapReduceMappingsToDoubleTask<K,V>
6393	<	extends BulkTask<K,V,Double> {
6392	>	@SuppressWarnings("serial") static final class MapReduceMappingsToDoubleTask<K,V>
6393	>	extends Traverser<K,V,Double> {
6394		final ObjectByObjectToDouble<? super K, ? super V> transformer;
6395		final DoubleByDoubleToDouble reducer;
6396		final double basis;
6397		double result;
6398	<	MapReduceMappingsToDoubleTask<K,V> sibling;
6398	>	MapReduceMappingsToDoubleTask<K,V> rights, nextRight;
6399		MapReduceMappingsToDoubleTask
6400	<	(ConcurrentHashMapV8<K,V> m,
6400	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6401	>	MapReduceMappingsToDoubleTask<K,V> nextRight,
6402		ObjectByObjectToDouble<? super K, ? super V> transformer,
6403		double basis,
6404		DoubleByDoubleToDouble reducer) {
6405	<	super(m);
6405	>	super(m, p, b); this.nextRight = nextRight;
6406		this.transformer = transformer;
6407		this.basis = basis; this.reducer = reducer;
6408		}
6409	<	MapReduceMappingsToDoubleTask
6410	<	(BulkTask<K,V,?> p, int b, boolean split,
6411	<	ObjectByObjectToDouble<? super K, ? super V> transformer,
6412	<	double basis,
6413	<	DoubleByDoubleToDouble reducer) {
6414	<	super(p, b, split);
6415	<	this.transformer = transformer;
6416	<	this.basis = basis; this.reducer = reducer;
6417	<	}
6418	<	public final void compute() {
6419	<	MapReduceMappingsToDoubleTask<K,V> t = this;
6420	<	final ObjectByObjectToDouble<? super K, ? super V> transformer =
6421	<	this.transformer;
6422	<	final DoubleByDoubleToDouble reducer = this.reducer;
6423	<	if (transformer == null || reducer == null)
6424	<	throw new Error(NullFunctionMessage);
6425	<	final double id = this.basis;
6426	<	int b = batch();
6427	<	while (b > 1 && t.baseIndex != t.baseLimit) {
6428	<	b >>>= 1;
6429	<	t.pending = 1;
6430	<	MapReduceMappingsToDoubleTask<K,V> rt =
6431	<	new MapReduceMappingsToDoubleTask<K,V>
6116	<	(t, b, true, transformer, id, reducer);
6117	<	t = new MapReduceMappingsToDoubleTask<K,V>
6118	<	(t, b, false, transformer, id, reducer);
6119	<	t.sibling = rt;
6120	<	rt.sibling = t;
6121	<	rt.fork();
6122	<	}
6123	<	double r = id;
6124	<	Object v;
6125	<	while ((v = t.advance()) != null)
6126	<	r = reducer.apply(r, transformer.apply((K)t.nextKey, (V)v));
6127	<	t.result = r;
6128	<	for (;;) {
6129	<	int c; BulkTask<K,V,?> par; MapReduceMappingsToDoubleTask<K,V> s, p;
6130	<	if ((par = t.parent) == null ||
6131	<	!(par instanceof MapReduceMappingsToDoubleTask)) {
6132	<	t.quietlyComplete();
6133	<	break;
6134	<	}
6135	<	else if ((c = (p = (MapReduceMappingsToDoubleTask<K,V>)par).pending) == 0) {
6136	<	if ((s = t.sibling) != null)
6137	<	r = reducer.apply(r, s.result);
6138	<	(t = p).result = r;
6409	>	public final Double getRawResult() { return result; }
6410	>	@SuppressWarnings("unchecked") public final void compute() {
6411	>	final ObjectByObjectToDouble<? super K, ? super V> transformer;
6412	>	final DoubleByDoubleToDouble reducer;
6413	>	if ((transformer = this.transformer) != null &&
6414	>	(reducer = this.reducer) != null) {
6415	>	double r = this.basis;
6416	>	for (int b; (b = preSplit()) > 0;)
6417	>	(rights = new MapReduceMappingsToDoubleTask<K,V>
6418	>	(map, this, b, rights, transformer, r, reducer)).fork();
6419	>	V v;
6420	>	while ((v = advance()) != null)
6421	>	r = reducer.apply(r, transformer.apply((K)nextKey, v));
6422	>	result = r;
6423	>	CountedCompleter<?> c;
6424	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6425	>	MapReduceMappingsToDoubleTask<K,V>
6426	>	t = (MapReduceMappingsToDoubleTask<K,V>)c,
6427	>	s = t.rights;
6428	>	while (s != null) {
6429	>	t.result = reducer.apply(t.result, s.result);
6430	>	s = t.rights = s.nextRight;
6431	>	}
6432		}
6140	–	else if (p.casPending(c, 0))
6141	–	break;
6433		}
6434		}
6144	–	public final Double getRawResult() { return result; }
6435		}
6436
6437	<	static final class MapReduceKeysToLongTask<K,V>
6438	<	extends BulkTask<K,V,Long> {
6437	>	@SuppressWarnings("serial") static final class MapReduceKeysToLongTask<K,V>
6438	>	extends Traverser<K,V,Long> {
6439		final ObjectToLong<? super K> transformer;
6440		final LongByLongToLong reducer;
6441		final long basis;
6442		long result;
6443	<	MapReduceKeysToLongTask<K,V> sibling;
6154	<	MapReduceKeysToLongTask
6155	<	(ConcurrentHashMapV8<K,V> m,
6156	<	ObjectToLong<? super K> transformer,
6157	<	long basis,
6158	<	LongByLongToLong reducer) {
6159	<	super(m);
6160	<	this.transformer = transformer;
6161	<	this.basis = basis; this.reducer = reducer;
6162	<	}
6443	>	MapReduceKeysToLongTask<K,V> rights, nextRight;
6444		MapReduceKeysToLongTask
6445	<	(BulkTask<K,V,?> p, int b, boolean split,
6445	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6446	>	MapReduceKeysToLongTask<K,V> nextRight,
6447		ObjectToLong<? super K> transformer,
6448		long basis,
6449		LongByLongToLong reducer) {
6450	<	super(p, b, split);
6450	>	super(m, p, b); this.nextRight = nextRight;
6451		this.transformer = transformer;
6452		this.basis = basis; this.reducer = reducer;
6453		}
6454	<	public final void compute() {
6455	<	MapReduceKeysToLongTask<K,V> t = this;
6456	<	final ObjectToLong<? super K> transformer =
6457	<	this.transformer;
6458	<	final LongByLongToLong reducer = this.reducer;
6459	<	if (transformer == null || reducer == null)
6460	<	throw new Error(NullFunctionMessage);
6461	<	final long id = this.basis;
6462	<	int b = batch();
6463	<	while (b > 1 && t.baseIndex != t.baseLimit) {
6464	<	b >>>= 1;
6465	<	t.pending = 1;
6466	<	MapReduceKeysToLongTask<K,V> rt =
6467	<	new MapReduceKeysToLongTask<K,V>
6468	<	(t, b, true, transformer, id, reducer);
6469	<	t = new MapReduceKeysToLongTask<K,V>
6470	<	(t, b, false, transformer, id, reducer);
6471	<	t.sibling = rt;
6472	<	rt.sibling = t;
6473	<	rt.fork();
6474	<	}
6475	<	long r = id;
6194	<	while (t.advance() != null)
6195	<	r = reducer.apply(r, transformer.apply((K)t.nextKey));
6196	<	t.result = r;
6197	<	for (;;) {
6198	<	int c; BulkTask<K,V,?> par; MapReduceKeysToLongTask<K,V> s, p;
6199	<	if ((par = t.parent) == null ||
6200	<	!(par instanceof MapReduceKeysToLongTask)) {
6201	<	t.quietlyComplete();
6202	<	break;
6203	<	}
6204	<	else if ((c = (p = (MapReduceKeysToLongTask<K,V>)par).pending) == 0) {
6205	<	if ((s = t.sibling) != null)
6206	<	r = reducer.apply(r, s.result);
6207	<	(t = p).result = r;
6454	>	public final Long getRawResult() { return result; }
6455	>	@SuppressWarnings("unchecked") public final void compute() {
6456	>	final ObjectToLong<? super K> transformer;
6457	>	final LongByLongToLong reducer;
6458	>	if ((transformer = this.transformer) != null &&
6459	>	(reducer = this.reducer) != null) {
6460	>	long r = this.basis;
6461	>	for (int b; (b = preSplit()) > 0;)
6462	>	(rights = new MapReduceKeysToLongTask<K,V>
6463	>	(map, this, b, rights, transformer, r, reducer)).fork();
6464	>	while (advance() != null)
6465	>	r = reducer.apply(r, transformer.apply((K)nextKey));
6466	>	result = r;
6467	>	CountedCompleter<?> c;
6468	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6469	>	MapReduceKeysToLongTask<K,V>
6470	>	t = (MapReduceKeysToLongTask<K,V>)c,
6471	>	s = t.rights;
6472	>	while (s != null) {
6473	>	t.result = reducer.apply(t.result, s.result);
6474	>	s = t.rights = s.nextRight;
6475	>	}
6476		}
6209	–	else if (p.casPending(c, 0))
6210	–	break;
6477		}
6478		}
6213	–	public final Long getRawResult() { return result; }
6479		}
6480
6481	<	static final class MapReduceValuesToLongTask<K,V>
6482	<	extends BulkTask<K,V,Long> {
6481	>	@SuppressWarnings("serial") static final class MapReduceValuesToLongTask<K,V>
6482	>	extends Traverser<K,V,Long> {
6483		final ObjectToLong<? super V> transformer;
6484		final LongByLongToLong reducer;
6485		final long basis;
6486		long result;
6487	<	MapReduceValuesToLongTask<K,V> sibling;
6223	<	MapReduceValuesToLongTask
6224	<	(ConcurrentHashMapV8<K,V> m,
6225	<	ObjectToLong<? super V> transformer,
6226	<	long basis,
6227	<	LongByLongToLong reducer) {
6228	<	super(m);
6229	<	this.transformer = transformer;
6230	<	this.basis = basis; this.reducer = reducer;
6231	<	}
6487	>	MapReduceValuesToLongTask<K,V> rights, nextRight;
6488		MapReduceValuesToLongTask
6489	<	(BulkTask<K,V,?> p, int b, boolean split,
6489	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6490	>	MapReduceValuesToLongTask<K,V> nextRight,
6491		ObjectToLong<? super V> transformer,
6492		long basis,
6493		LongByLongToLong reducer) {
6494	<	super(p, b, split);
6494	>	super(m, p, b); this.nextRight = nextRight;
6495		this.transformer = transformer;
6496		this.basis = basis; this.reducer = reducer;
6497		}
6498	<	public final void compute() {
6499	<	MapReduceValuesToLongTask<K,V> t = this;
6500	<	final ObjectToLong<? super V> transformer =
6501	<	this.transformer;
6502	<	final LongByLongToLong reducer = this.reducer;
6503	<	if (transformer == null || reducer == null)
6504	<	throw new Error(NullFunctionMessage);
6505	<	final long id = this.basis;
6506	<	int b = batch();
6507	<	while (b > 1 && t.baseIndex != t.baseLimit) {
6508	<	b >>>= 1;
6509	<	t.pending = 1;
6510	<	MapReduceValuesToLongTask<K,V> rt =
6511	<	new MapReduceValuesToLongTask<K,V>
6512	<	(t, b, true, transformer, id, reducer);
6513	<	t = new MapReduceValuesToLongTask<K,V>
6514	<	(t, b, false, transformer, id, reducer);
6515	<	t.sibling = rt;
6516	<	rt.sibling = t;
6517	<	rt.fork();
6518	<	}
6519	<	long r = id;
6520	<	Object v;
6264	<	while ((v = t.advance()) != null)
6265	<	r = reducer.apply(r, transformer.apply((V)v));
6266	<	t.result = r;
6267	<	for (;;) {
6268	<	int c; BulkTask<K,V,?> par; MapReduceValuesToLongTask<K,V> s, p;
6269	<	if ((par = t.parent) == null ||
6270	<	!(par instanceof MapReduceValuesToLongTask)) {
6271	<	t.quietlyComplete();
6272	<	break;
6273	<	}
6274	<	else if ((c = (p = (MapReduceValuesToLongTask<K,V>)par).pending) == 0) {
6275	<	if ((s = t.sibling) != null)
6276	<	r = reducer.apply(r, s.result);
6277	<	(t = p).result = r;
6498	>	public final Long getRawResult() { return result; }
6499	>	@SuppressWarnings("unchecked") public final void compute() {
6500	>	final ObjectToLong<? super V> transformer;
6501	>	final LongByLongToLong reducer;
6502	>	if ((transformer = this.transformer) != null &&
6503	>	(reducer = this.reducer) != null) {
6504	>	long r = this.basis;
6505	>	for (int b; (b = preSplit()) > 0;)
6506	>	(rights = new MapReduceValuesToLongTask<K,V>
6507	>	(map, this, b, rights, transformer, r, reducer)).fork();
6508	>	V v;
6509	>	while ((v = advance()) != null)
6510	>	r = reducer.apply(r, transformer.apply(v));
6511	>	result = r;
6512	>	CountedCompleter<?> c;
6513	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6514	>	MapReduceValuesToLongTask<K,V>
6515	>	t = (MapReduceValuesToLongTask<K,V>)c,
6516	>	s = t.rights;
6517	>	while (s != null) {
6518	>	t.result = reducer.apply(t.result, s.result);
6519	>	s = t.rights = s.nextRight;
6520	>	}
6521		}
6279	–	else if (p.casPending(c, 0))
6280	–	break;
6522		}
6523		}
6283	–	public final Long getRawResult() { return result; }
6524		}
6525
6526	<	static final class MapReduceEntriesToLongTask<K,V>
6527	<	extends BulkTask<K,V,Long> {
6526	>	@SuppressWarnings("serial") static final class MapReduceEntriesToLongTask<K,V>
6527	>	extends Traverser<K,V,Long> {
6528		final ObjectToLong<Map.Entry<K,V>> transformer;
6529		final LongByLongToLong reducer;
6530		final long basis;
6531		long result;
6532	<	MapReduceEntriesToLongTask<K,V> sibling;
6293	<	MapReduceEntriesToLongTask
6294	<	(ConcurrentHashMapV8<K,V> m,
6295	<	ObjectToLong<Map.Entry<K,V>> transformer,
6296	<	long basis,
6297	<	LongByLongToLong reducer) {
6298	<	super(m);
6299	<	this.transformer = transformer;
6300	<	this.basis = basis; this.reducer = reducer;
6301	<	}
6532	>	MapReduceEntriesToLongTask<K,V> rights, nextRight;
6533		MapReduceEntriesToLongTask
6534	<	(BulkTask<K,V,?> p, int b, boolean split,
6534	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6535	>	MapReduceEntriesToLongTask<K,V> nextRight,
6536		ObjectToLong<Map.Entry<K,V>> transformer,
6537		long basis,
6538		LongByLongToLong reducer) {
6539	<	super(p, b, split);
6539	>	super(m, p, b); this.nextRight = nextRight;
6540		this.transformer = transformer;
6541		this.basis = basis; this.reducer = reducer;
6542		}
6543	<	public final void compute() {
6544	<	MapReduceEntriesToLongTask<K,V> t = this;
6545	<	final ObjectToLong<Map.Entry<K,V>> transformer =
6546	<	this.transformer;
6547	<	final LongByLongToLong reducer = this.reducer;
6548	<	if (transformer == null || reducer == null)
6549	<	throw new Error(NullFunctionMessage);
6550	<	final long id = this.basis;
6551	<	int b = batch();
6552	<	while (b > 1 && t.baseIndex != t.baseLimit) {
6553	<	b >>>= 1;
6554	<	t.pending = 1;
6555	<	MapReduceEntriesToLongTask<K,V> rt =
6556	<	new MapReduceEntriesToLongTask<K,V>
6557	<	(t, b, true, transformer, id, reducer);
6558	<	t = new MapReduceEntriesToLongTask<K,V>
6559	<	(t, b, false, transformer, id, reducer);
6560	<	t.sibling = rt;
6561	<	rt.sibling = t;
6562	<	rt.fork();
6563	<	}
6564	<	long r = id;
6565	<	Object v;
6566	<	while ((v = t.advance()) != null)
6335	<	r = reducer.apply(r, transformer.apply(entryFor((K)t.nextKey, (V)v)));
6336	<	t.result = r;
6337	<	for (;;) {
6338	<	int c; BulkTask<K,V,?> par; MapReduceEntriesToLongTask<K,V> s, p;
6339	<	if ((par = t.parent) == null ||
6340	<	!(par instanceof MapReduceEntriesToLongTask)) {
6341	<	t.quietlyComplete();
6342	<	break;
6343	<	}
6344	<	else if ((c = (p = (MapReduceEntriesToLongTask<K,V>)par).pending) == 0) {
6345	<	if ((s = t.sibling) != null)
6346	<	r = reducer.apply(r, s.result);
6347	<	(t = p).result = r;
6543	>	public final Long getRawResult() { return result; }
6544	>	@SuppressWarnings("unchecked") public final void compute() {
6545	>	final ObjectToLong<Map.Entry<K,V>> transformer;
6546	>	final LongByLongToLong reducer;
6547	>	if ((transformer = this.transformer) != null &&
6548	>	(reducer = this.reducer) != null) {
6549	>	long r = this.basis;
6550	>	for (int b; (b = preSplit()) > 0;)
6551	>	(rights = new MapReduceEntriesToLongTask<K,V>
6552	>	(map, this, b, rights, transformer, r, reducer)).fork();
6553	>	V v;
6554	>	while ((v = advance()) != null)
6555	>	r = reducer.apply(r, transformer.apply(entryFor((K)nextKey,
6556	>	v)));
6557	>	result = r;
6558	>	CountedCompleter<?> c;
6559	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6560	>	MapReduceEntriesToLongTask<K,V>
6561	>	t = (MapReduceEntriesToLongTask<K,V>)c,
6562	>	s = t.rights;
6563	>	while (s != null) {
6564	>	t.result = reducer.apply(t.result, s.result);
6565	>	s = t.rights = s.nextRight;
6566	>	}
6567		}
6349	–	else if (p.casPending(c, 0))
6350	–	break;
6568		}
6569		}
6353	–	public final Long getRawResult() { return result; }
6570		}
6571
6572	<	static final class MapReduceMappingsToLongTask<K,V>
6573	<	extends BulkTask<K,V,Long> {
6572	>	@SuppressWarnings("serial") static final class MapReduceMappingsToLongTask<K,V>
6573	>	extends Traverser<K,V,Long> {
6574		final ObjectByObjectToLong<? super K, ? super V> transformer;
6575		final LongByLongToLong reducer;
6576		final long basis;
6577		long result;
6578	<	MapReduceMappingsToLongTask<K,V> sibling;
6363	<	MapReduceMappingsToLongTask
6364	<	(ConcurrentHashMapV8<K,V> m,
6365	<	ObjectByObjectToLong<? super K, ? super V> transformer,
6366	<	long basis,
6367	<	LongByLongToLong reducer) {
6368	<	super(m);
6369	<	this.transformer = transformer;
6370	<	this.basis = basis; this.reducer = reducer;
6371	<	}
6578	>	MapReduceMappingsToLongTask<K,V> rights, nextRight;
6579		MapReduceMappingsToLongTask
6580	<	(BulkTask<K,V,?> p, int b, boolean split,
6580	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6581	>	MapReduceMappingsToLongTask<K,V> nextRight,
6582		ObjectByObjectToLong<? super K, ? super V> transformer,
6583		long basis,
6584		LongByLongToLong reducer) {
6585	<	super(p, b, split);
6585	>	super(m, p, b); this.nextRight = nextRight;
6586		this.transformer = transformer;
6587		this.basis = basis; this.reducer = reducer;
6588		}
6589	<	public final void compute() {
6590	<	MapReduceMappingsToLongTask<K,V> t = this;
6591	<	final ObjectByObjectToLong<? super K, ? super V> transformer =
6592	<	this.transformer;
6593	<	final LongByLongToLong reducer = this.reducer;
6594	<	if (transformer == null || reducer == null)
6595	<	throw new Error(NullFunctionMessage);
6596	<	final long id = this.basis;
6597	<	int b = batch();
6598	<	while (b > 1 && t.baseIndex != t.baseLimit) {
6599	<	b >>>= 1;
6600	<	t.pending = 1;
6601	<	MapReduceMappingsToLongTask<K,V> rt =
6602	<	new MapReduceMappingsToLongTask<K,V>
6603	<	(t, b, true, transformer, id, reducer);
6604	<	t = new MapReduceMappingsToLongTask<K,V>
6605	<	(t, b, false, transformer, id, reducer);
6606	<	t.sibling = rt;
6607	<	rt.sibling = t;
6608	<	rt.fork();
6609	<	}
6610	<	long r = id;
6611	<	Object v;
6404	<	while ((v = t.advance()) != null)
6405	<	r = reducer.apply(r, transformer.apply((K)t.nextKey, (V)v));
6406	<	t.result = r;
6407	<	for (;;) {
6408	<	int c; BulkTask<K,V,?> par; MapReduceMappingsToLongTask<K,V> s, p;
6409	<	if ((par = t.parent) == null ||
6410	<	!(par instanceof MapReduceMappingsToLongTask)) {
6411	<	t.quietlyComplete();
6412	<	break;
6413	<	}
6414	<	else if ((c = (p = (MapReduceMappingsToLongTask<K,V>)par).pending) == 0) {
6415	<	if ((s = t.sibling) != null)
6416	<	r = reducer.apply(r, s.result);
6417	<	(t = p).result = r;
6589	>	public final Long getRawResult() { return result; }
6590	>	@SuppressWarnings("unchecked") public final void compute() {
6591	>	final ObjectByObjectToLong<? super K, ? super V> transformer;
6592	>	final LongByLongToLong reducer;
6593	>	if ((transformer = this.transformer) != null &&
6594	>	(reducer = this.reducer) != null) {
6595	>	long r = this.basis;
6596	>	for (int b; (b = preSplit()) > 0;)
6597	>	(rights = new MapReduceMappingsToLongTask<K,V>
6598	>	(map, this, b, rights, transformer, r, reducer)).fork();
6599	>	V v;
6600	>	while ((v = advance()) != null)
6601	>	r = reducer.apply(r, transformer.apply((K)nextKey, v));
6602	>	result = r;
6603	>	CountedCompleter<?> c;
6604	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6605	>	MapReduceMappingsToLongTask<K,V>
6606	>	t = (MapReduceMappingsToLongTask<K,V>)c,
6607	>	s = t.rights;
6608	>	while (s != null) {
6609	>	t.result = reducer.apply(t.result, s.result);
6610	>	s = t.rights = s.nextRight;
6611	>	}
6612		}
6419	–	else if (p.casPending(c, 0))
6420	–	break;
6613		}
6614		}
6423	–	public final Long getRawResult() { return result; }
6615		}
6616
6617	<	static final class MapReduceKeysToIntTask<K,V>
6618	<	extends BulkTask<K,V,Integer> {
6617	>	@SuppressWarnings("serial") static final class MapReduceKeysToIntTask<K,V>
6618	>	extends Traverser<K,V,Integer> {
6619		final ObjectToInt<? super K> transformer;
6620		final IntByIntToInt reducer;
6621		final int basis;
6622		int result;
6623	<	MapReduceKeysToIntTask<K,V> sibling;
6433	<	MapReduceKeysToIntTask
6434	<	(ConcurrentHashMapV8<K,V> m,
6435	<	ObjectToInt<? super K> transformer,
6436	<	int basis,
6437	<	IntByIntToInt reducer) {
6438	<	super(m);
6439	<	this.transformer = transformer;
6440	<	this.basis = basis; this.reducer = reducer;
6441	<	}
6623	>	MapReduceKeysToIntTask<K,V> rights, nextRight;
6624		MapReduceKeysToIntTask
6625	<	(BulkTask<K,V,?> p, int b, boolean split,
6625	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6626	>	MapReduceKeysToIntTask<K,V> nextRight,
6627		ObjectToInt<? super K> transformer,
6628		int basis,
6629		IntByIntToInt reducer) {
6630	<	super(p, b, split);
6630	>	super(m, p, b); this.nextRight = nextRight;
6631		this.transformer = transformer;
6632		this.basis = basis; this.reducer = reducer;
6633		}
6634	<	public final void compute() {
6635	<	MapReduceKeysToIntTask<K,V> t = this;
6636	<	final ObjectToInt<? super K> transformer =
6637	<	this.transformer;
6638	<	final IntByIntToInt reducer = this.reducer;
6639	<	if (transformer == null || reducer == null)
6640	<	throw new Error(NullFunctionMessage);
6641	<	final int id = this.basis;
6642	<	int b = batch();
6643	<	while (b > 1 && t.baseIndex != t.baseLimit) {
6644	<	b >>>= 1;
6645	<	t.pending = 1;
6646	<	MapReduceKeysToIntTask<K,V> rt =
6647	<	new MapReduceKeysToIntTask<K,V>
6648	<	(t, b, true, transformer, id, reducer);
6649	<	t = new MapReduceKeysToIntTask<K,V>
6650	<	(t, b, false, transformer, id, reducer);
6651	<	t.sibling = rt;
6652	<	rt.sibling = t;
6653	<	rt.fork();
6654	<	}
6655	<	int r = id;
6473	<	while (t.advance() != null)
6474	<	r = reducer.apply(r, transformer.apply((K)t.nextKey));
6475	<	t.result = r;
6476	<	for (;;) {
6477	<	int c; BulkTask<K,V,?> par; MapReduceKeysToIntTask<K,V> s, p;
6478	<	if ((par = t.parent) == null ||
6479	<	!(par instanceof MapReduceKeysToIntTask)) {
6480	<	t.quietlyComplete();
6481	<	break;
6482	<	}
6483	<	else if ((c = (p = (MapReduceKeysToIntTask<K,V>)par).pending) == 0) {
6484	<	if ((s = t.sibling) != null)
6485	<	r = reducer.apply(r, s.result);
6486	<	(t = p).result = r;
6634	>	public final Integer getRawResult() { return result; }
6635	>	@SuppressWarnings("unchecked") public final void compute() {
6636	>	final ObjectToInt<? super K> transformer;
6637	>	final IntByIntToInt reducer;
6638	>	if ((transformer = this.transformer) != null &&
6639	>	(reducer = this.reducer) != null) {
6640	>	int r = this.basis;
6641	>	for (int b; (b = preSplit()) > 0;)
6642	>	(rights = new MapReduceKeysToIntTask<K,V>
6643	>	(map, this, b, rights, transformer, r, reducer)).fork();
6644	>	while (advance() != null)
6645	>	r = reducer.apply(r, transformer.apply((K)nextKey));
6646	>	result = r;
6647	>	CountedCompleter<?> c;
6648	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6649	>	MapReduceKeysToIntTask<K,V>
6650	>	t = (MapReduceKeysToIntTask<K,V>)c,
6651	>	s = t.rights;
6652	>	while (s != null) {
6653	>	t.result = reducer.apply(t.result, s.result);
6654	>	s = t.rights = s.nextRight;
6655	>	}
6656		}
6488	–	else if (p.casPending(c, 0))
6489	–	break;
6657		}
6658		}
6492	–	public final Integer getRawResult() { return result; }
6659		}
6660
6661	<	static final class MapReduceValuesToIntTask<K,V>
6662	<	extends BulkTask<K,V,Integer> {
6661	>	@SuppressWarnings("serial") static final class MapReduceValuesToIntTask<K,V>
6662	>	extends Traverser<K,V,Integer> {
6663		final ObjectToInt<? super V> transformer;
6664		final IntByIntToInt reducer;
6665		final int basis;
6666		int result;
6667	<	MapReduceValuesToIntTask<K,V> sibling;
6502	<	MapReduceValuesToIntTask
6503	<	(ConcurrentHashMapV8<K,V> m,
6504	<	ObjectToInt<? super V> transformer,
6505	<	int basis,
6506	<	IntByIntToInt reducer) {
6507	<	super(m);
6508	<	this.transformer = transformer;
6509	<	this.basis = basis; this.reducer = reducer;
6510	<	}
6667	>	MapReduceValuesToIntTask<K,V> rights, nextRight;
6668		MapReduceValuesToIntTask
6669	<	(BulkTask<K,V,?> p, int b, boolean split,
6669	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6670	>	MapReduceValuesToIntTask<K,V> nextRight,
6671		ObjectToInt<? super V> transformer,
6672		int basis,
6673		IntByIntToInt reducer) {
6674	<	super(p, b, split);
6674	>	super(m, p, b); this.nextRight = nextRight;
6675		this.transformer = transformer;
6676		this.basis = basis; this.reducer = reducer;
6677		}
6678	<	public final void compute() {
6679	<	MapReduceValuesToIntTask<K,V> t = this;
6680	<	final ObjectToInt<? super V> transformer =
6681	<	this.transformer;
6682	<	final IntByIntToInt reducer = this.reducer;
6683	<	if (transformer == null || reducer == null)
6684	<	throw new Error(NullFunctionMessage);
6685	<	final int id = this.basis;
6686	<	int b = batch();
6687	<	while (b > 1 && t.baseIndex != t.baseLimit) {
6688	<	b >>>= 1;
6689	<	t.pending = 1;
6690	<	MapReduceValuesToIntTask<K,V> rt =
6691	<	new MapReduceValuesToIntTask<K,V>
6692	<	(t, b, true, transformer, id, reducer);
6693	<	t = new MapReduceValuesToIntTask<K,V>
6694	<	(t, b, false, transformer, id, reducer);
6695	<	t.sibling = rt;
6696	<	rt.sibling = t;
6697	<	rt.fork();
6698	<	}
6699	<	int r = id;
6700	<	Object v;
6543	<	while ((v = t.advance()) != null)
6544	<	r = reducer.apply(r, transformer.apply((V)v));
6545	<	t.result = r;
6546	<	for (;;) {
6547	<	int c; BulkTask<K,V,?> par; MapReduceValuesToIntTask<K,V> s, p;
6548	<	if ((par = t.parent) == null ||
6549	<	!(par instanceof MapReduceValuesToIntTask)) {
6550	<	t.quietlyComplete();
6551	<	break;
6552	<	}
6553	<	else if ((c = (p = (MapReduceValuesToIntTask<K,V>)par).pending) == 0) {
6554	<	if ((s = t.sibling) != null)
6555	<	r = reducer.apply(r, s.result);
6556	<	(t = p).result = r;
6678	>	public final Integer getRawResult() { return result; }
6679	>	@SuppressWarnings("unchecked") public final void compute() {
6680	>	final ObjectToInt<? super V> transformer;
6681	>	final IntByIntToInt reducer;
6682	>	if ((transformer = this.transformer) != null &&
6683	>	(reducer = this.reducer) != null) {
6684	>	int r = this.basis;
6685	>	for (int b; (b = preSplit()) > 0;)
6686	>	(rights = new MapReduceValuesToIntTask<K,V>
6687	>	(map, this, b, rights, transformer, r, reducer)).fork();
6688	>	V v;
6689	>	while ((v = advance()) != null)
6690	>	r = reducer.apply(r, transformer.apply(v));
6691	>	result = r;
6692	>	CountedCompleter<?> c;
6693	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6694	>	MapReduceValuesToIntTask<K,V>
6695	>	t = (MapReduceValuesToIntTask<K,V>)c,
6696	>	s = t.rights;
6697	>	while (s != null) {
6698	>	t.result = reducer.apply(t.result, s.result);
6699	>	s = t.rights = s.nextRight;
6700	>	}
6701		}
6558	–	else if (p.casPending(c, 0))
6559	–	break;
6702		}
6703		}
6562	–	public final Integer getRawResult() { return result; }
6704		}
6705
6706	<	static final class MapReduceEntriesToIntTask<K,V>
6707	<	extends BulkTask<K,V,Integer> {
6706	>	@SuppressWarnings("serial") static final class MapReduceEntriesToIntTask<K,V>
6707	>	extends Traverser<K,V,Integer> {
6708		final ObjectToInt<Map.Entry<K,V>> transformer;
6709		final IntByIntToInt reducer;
6710		final int basis;
6711		int result;
6712	<	MapReduceEntriesToIntTask<K,V> sibling;
6572	<	MapReduceEntriesToIntTask
6573	<	(ConcurrentHashMapV8<K,V> m,
6574	<	ObjectToInt<Map.Entry<K,V>> transformer,
6575	<	int basis,
6576	<	IntByIntToInt reducer) {
6577	<	super(m);
6578	<	this.transformer = transformer;
6579	<	this.basis = basis; this.reducer = reducer;
6580	<	}
6712	>	MapReduceEntriesToIntTask<K,V> rights, nextRight;
6713		MapReduceEntriesToIntTask
6714	<	(BulkTask<K,V,?> p, int b, boolean split,
6714	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6715	>	MapReduceEntriesToIntTask<K,V> nextRight,
6716		ObjectToInt<Map.Entry<K,V>> transformer,
6717		int basis,
6718		IntByIntToInt reducer) {
6719	<	super(p, b, split);
6719	>	super(m, p, b); this.nextRight = nextRight;
6720		this.transformer = transformer;
6721		this.basis = basis; this.reducer = reducer;
6722		}
6723	<	public final void compute() {
6724	<	MapReduceEntriesToIntTask<K,V> t = this;
6725	<	final ObjectToInt<Map.Entry<K,V>> transformer =
6726	<	this.transformer;
6727	<	final IntByIntToInt reducer = this.reducer;
6728	<	if (transformer == null || reducer == null)
6729	<	throw new Error(NullFunctionMessage);
6730	<	final int id = this.basis;
6731	<	int b = batch();
6732	<	while (b > 1 && t.baseIndex != t.baseLimit) {
6733	<	b >>>= 1;
6734	<	t.pending = 1;
6735	<	MapReduceEntriesToIntTask<K,V> rt =
6736	<	new MapReduceEntriesToIntTask<K,V>
6737	<	(t, b, true, transformer, id, reducer);
6738	<	t = new MapReduceEntriesToIntTask<K,V>
6739	<	(t, b, false, transformer, id, reducer);
6740	<	t.sibling = rt;
6741	<	rt.sibling = t;
6742	<	rt.fork();
6743	<	}
6744	<	int r = id;
6745	<	Object v;
6746	<	while ((v = t.advance()) != null)
6614	<	r = reducer.apply(r, transformer.apply(entryFor((K)t.nextKey, (V)v)));
6615	<	t.result = r;
6616	<	for (;;) {
6617	<	int c; BulkTask<K,V,?> par; MapReduceEntriesToIntTask<K,V> s, p;
6618	<	if ((par = t.parent) == null ||
6619	<	!(par instanceof MapReduceEntriesToIntTask)) {
6620	<	t.quietlyComplete();
6621	<	break;
6622	<	}
6623	<	else if ((c = (p = (MapReduceEntriesToIntTask<K,V>)par).pending) == 0) {
6624	<	if ((s = t.sibling) != null)
6625	<	r = reducer.apply(r, s.result);
6626	<	(t = p).result = r;
6723	>	public final Integer getRawResult() { return result; }
6724	>	@SuppressWarnings("unchecked") public final void compute() {
6725	>	final ObjectToInt<Map.Entry<K,V>> transformer;
6726	>	final IntByIntToInt reducer;
6727	>	if ((transformer = this.transformer) != null &&
6728	>	(reducer = this.reducer) != null) {
6729	>	int r = this.basis;
6730	>	for (int b; (b = preSplit()) > 0;)
6731	>	(rights = new MapReduceEntriesToIntTask<K,V>
6732	>	(map, this, b, rights, transformer, r, reducer)).fork();
6733	>	V v;
6734	>	while ((v = advance()) != null)
6735	>	r = reducer.apply(r, transformer.apply(entryFor((K)nextKey,
6736	>	v)));
6737	>	result = r;
6738	>	CountedCompleter<?> c;
6739	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6740	>	MapReduceEntriesToIntTask<K,V>
6741	>	t = (MapReduceEntriesToIntTask<K,V>)c,
6742	>	s = t.rights;
6743	>	while (s != null) {
6744	>	t.result = reducer.apply(t.result, s.result);
6745	>	s = t.rights = s.nextRight;
6746	>	}
6747		}
6628	–	else if (p.casPending(c, 0))
6629	–	break;
6748		}
6749		}
6632	–	public final Integer getRawResult() { return result; }
6750		}
6751
6752	<	static final class MapReduceMappingsToIntTask<K,V>
6753	<	extends BulkTask<K,V,Integer> {
6752	>	@SuppressWarnings("serial") static final class MapReduceMappingsToIntTask<K,V>
6753	>	extends Traverser<K,V,Integer> {
6754		final ObjectByObjectToInt<? super K, ? super V> transformer;
6755		final IntByIntToInt reducer;
6756		final int basis;
6757		int result;
6758	<	MapReduceMappingsToIntTask<K,V> sibling;
6758	>	MapReduceMappingsToIntTask<K,V> rights, nextRight;
6759		MapReduceMappingsToIntTask
6760	<	(ConcurrentHashMapV8<K,V> m,
6760	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6761	>	MapReduceMappingsToIntTask<K,V> nextRight,
6762		ObjectByObjectToInt<? super K, ? super V> transformer,
6763		int basis,
6764		IntByIntToInt reducer) {
6765	<	super(m);
6765	>	super(m, p, b); this.nextRight = nextRight;
6766		this.transformer = transformer;
6767		this.basis = basis; this.reducer = reducer;
6768		}
6769	<	MapReduceMappingsToIntTask
6770	<	(BulkTask<K,V,?> p, int b, boolean split,
6771	<	ObjectByObjectToInt<? super K, ? super V> transformer,
6772	<	int basis,
6773	<	IntByIntToInt reducer) {
6774	<	super(p, b, split);
6775	<	this.transformer = transformer;
6776	<	this.basis = basis; this.reducer = reducer;
6777	<	}
6778	<	public final void compute() {
6779	<	MapReduceMappingsToIntTask<K,V> t = this;
6780	<	final ObjectByObjectToInt<? super K, ? super V> transformer =
6781	<	this.transformer;
6782	<	final IntByIntToInt reducer = this.reducer;
6783	<	if (transformer == null || reducer == null)
6784	<	throw new Error(NullFunctionMessage);
6785	<	final int id = this.basis;
6786	<	int b = batch();
6787	<	while (b > 1 && t.baseIndex != t.baseLimit) {
6788	<	b >>>= 1;
6789	<	t.pending = 1;
6790	<	MapReduceMappingsToIntTask<K,V> rt =
6791	<	new MapReduceMappingsToIntTask<K,V>
6674	<	(t, b, true, transformer, id, reducer);
6675	<	t = new MapReduceMappingsToIntTask<K,V>
6676	<	(t, b, false, transformer, id, reducer);
6677	<	t.sibling = rt;
6678	<	rt.sibling = t;
6679	<	rt.fork();
6680	<	}
6681	<	int r = id;
6682	<	Object v;
6683	<	while ((v = t.advance()) != null)
6684	<	r = reducer.apply(r, transformer.apply((K)t.nextKey, (V)v));
6685	<	t.result = r;
6686	<	for (;;) {
6687	<	int c; BulkTask<K,V,?> par; MapReduceMappingsToIntTask<K,V> s, p;
6688	<	if ((par = t.parent) == null ||
6689	<	!(par instanceof MapReduceMappingsToIntTask)) {
6690	<	t.quietlyComplete();
6691	<	break;
6692	<	}
6693	<	else if ((c = (p = (MapReduceMappingsToIntTask<K,V>)par).pending) == 0) {
6694	<	if ((s = t.sibling) != null)
6695	<	r = reducer.apply(r, s.result);
6696	<	(t = p).result = r;
6769	>	public final Integer getRawResult() { return result; }
6770	>	@SuppressWarnings("unchecked") public final void compute() {
6771	>	final ObjectByObjectToInt<? super K, ? super V> transformer;
6772	>	final IntByIntToInt reducer;
6773	>	if ((transformer = this.transformer) != null &&
6774	>	(reducer = this.reducer) != null) {
6775	>	int r = this.basis;
6776	>	for (int b; (b = preSplit()) > 0;)
6777	>	(rights = new MapReduceMappingsToIntTask<K,V>
6778	>	(map, this, b, rights, transformer, r, reducer)).fork();
6779	>	V v;
6780	>	while ((v = advance()) != null)
6781	>	r = reducer.apply(r, transformer.apply((K)nextKey, v));
6782	>	result = r;
6783	>	CountedCompleter<?> c;
6784	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6785	>	MapReduceMappingsToIntTask<K,V>
6786	>	t = (MapReduceMappingsToIntTask<K,V>)c,
6787	>	s = t.rights;
6788	>	while (s != null) {
6789	>	t.result = reducer.apply(t.result, s.result);
6790	>	s = t.rights = s.nextRight;
6791	>	}
6792		}
6698	–	else if (p.casPending(c, 0))
6699	–	break;
6793		}
6794		}
6702	–	public final Integer getRawResult() { return result; }
6795		}
6796
6705	–
6797		// Unsafe mechanics
6798	<	private static final sun.misc.Unsafe UNSAFE;
6799	<	private static final long counterOffset;
6800	<	private static final long sizeCtlOffset;
6798	>	private static final sun.misc.Unsafe U;
6799	>	private static final long SIZECTL;
6800	>	private static final long TRANSFERINDEX;
6801	>	private static final long TRANSFERORIGIN;
6802	>	private static final long BASECOUNT;
6803	>	private static final long COUNTERBUSY;
6804	>	private static final long CELLVALUE;
6805		private static final long ABASE;
6806		private static final int ASHIFT;
6807
6808		static {
6714	–	int ss;
6809		try {
6810	<	UNSAFE = getUnsafe();
6810	>	U = getUnsafe();
6811		Class<?> k = ConcurrentHashMapV8.class;
6812	<	counterOffset = UNSAFE.objectFieldOffset
6719	<	(k.getDeclaredField("counter"));
6720	<	sizeCtlOffset = UNSAFE.objectFieldOffset
6812	>	SIZECTL = U.objectFieldOffset
6813		(k.getDeclaredField("sizeCtl"));
6814	+	TRANSFERINDEX = U.objectFieldOffset
6815	+	(k.getDeclaredField("transferIndex"));
6816	+	TRANSFERORIGIN = U.objectFieldOffset
6817	+	(k.getDeclaredField("transferOrigin"));
6818	+	BASECOUNT = U.objectFieldOffset
6819	+	(k.getDeclaredField("baseCount"));
6820	+	COUNTERBUSY = U.objectFieldOffset
6821	+	(k.getDeclaredField("counterBusy"));
6822	+	Class<?> ck = CounterCell.class;
6823	+	CELLVALUE = U.objectFieldOffset
6824	+	(ck.getDeclaredField("value"));
6825		Class<?> sc = Node[].class;
6826	<	ABASE = UNSAFE.arrayBaseOffset(sc);
6827	<	ss = UNSAFE.arrayIndexScale(sc);
6826	>	ABASE = U.arrayBaseOffset(sc);
6827	>	int scale = U.arrayIndexScale(sc);
6828	>	if ((scale & (scale - 1)) != 0)
6829	>	throw new Error("data type scale not a power of two");
6830	>	ASHIFT = 31 - Integer.numberOfLeadingZeros(scale);
6831		} catch (Exception e) {
6832		throw new Error(e);
6833		}
6728	–	if ((ss & (ss-1)) != 0)
6729	–	throw new Error("data type scale not a power of two");
6730	–	ASHIFT = 31 - Integer.numberOfLeadingZeros(ss);
6834		}
6835
6836		/**
#	Line 6740 | Line 6843 | public class ConcurrentHashMapV8<K, V>
6843		private static sun.misc.Unsafe getUnsafe() {
6844		try {
6845		return sun.misc.Unsafe.getUnsafe();
6846	<	} catch (SecurityException se) {
6847	<	try {
6848	<	return java.security.AccessController.doPrivileged
6849	<	(new java.security
6850	<	.PrivilegedExceptionAction<sun.misc.Unsafe>() {
6851	<	public sun.misc.Unsafe run() throws Exception {
6852	<	java.lang.reflect.Field f = sun.misc
6853	<	.Unsafe.class.getDeclaredField("theUnsafe");
6854	<	f.setAccessible(true);
6855	<	return (sun.misc.Unsafe) f.get(null);
6856	<	}});
6857	<	} catch (java.security.PrivilegedActionException e) {
6858	<	throw new RuntimeException("Could not initialize intrinsics",
6859	<	e.getCause());
6860	<	}
6846	>	} catch (SecurityException tryReflectionInstead) {}
6847	>	try {
6848	>	return java.security.AccessController.doPrivileged
6849	>	(new java.security.PrivilegedExceptionAction<sun.misc.Unsafe>() {
6850	>	public sun.misc.Unsafe run() throws Exception {
6851	>	Class<sun.misc.Unsafe> k = sun.misc.Unsafe.class;
6852	>	for (java.lang.reflect.Field f : k.getDeclaredFields()) {
6853	>	f.setAccessible(true);
6854	>	Object x = f.get(null);
6855	>	if (k.isInstance(x))
6856	>	return k.cast(x);
6857	>	}
6858	>	throw new NoSuchFieldError("the Unsafe");
6859	>	}});
6860	>	} catch (java.security.PrivilegedActionException e) {
6861	>	throw new RuntimeException("Could not initialize intrinsics",
6862	>	e.getCause());
6863		}
6864		}
6865		}

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