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Comparing jsr166/src/main/java/util/concurrent/ConcurrentHashMap.java (file contents):
Revision 1.143 by jsr166, Fri Nov 9 03:30:03 2012 UTC vs.
Revision 1.189 by jsr166, Mon Feb 18 01:30:23 2013 UTC

#	Line 5 | Line 5
5		*/
6
7		package java.util.concurrent;
8	–	import java.util.concurrent.atomic.LongAdder;
8		import java.util.concurrent.ForkJoinPool;
9	<	import java.util.concurrent.ForkJoinTask;
9	>	import java.util.concurrent.CountedCompleter;
10	>	import java.util.function.*;
11	>	import java.util.Spliterator;
12	>	import java.util.stream.Stream;
13	>	import java.util.stream.Streams;
14
15		import java.util.Comparator;
16		import java.util.Arrays;
#	Line 24 | Line 27 | import java.util.Enumeration;
27		import java.util.ConcurrentModificationException;
28		import java.util.NoSuchElementException;
29		import java.util.concurrent.ConcurrentMap;
27	–	import java.util.concurrent.ThreadLocalRandom;
28	–	import java.util.concurrent.locks.LockSupport;
30		import java.util.concurrent.locks.AbstractQueuedSynchronizer;
31	+	import java.util.concurrent.atomic.AtomicInteger;
32		import java.util.concurrent.atomic.AtomicReference;
31	–
33		import java.io.Serializable;
34
35		/**
#	Line 43 | Line 44 | import java.io.Serializable;
44		* interoperable with {@code Hashtable} in programs that rely on its
45		* thread safety but not on its synchronization details.
46		*
47	<	* <p> Retrieval operations (including {@code get}) generally do not
47	>	* <p>Retrieval operations (including {@code get}) generally do not
48		* block, so may overlap with update operations (including {@code put}
49		* and {@code remove}). Retrievals reflect the results of the most
50		* recently <em>completed</em> update operations holding upon their
#	Line 64 | Line 65 | import java.io.Serializable;
65		* that may be adequate for monitoring or estimation purposes, but not
66		* for program control.
67		*
68	<	* <p> The table is dynamically expanded when there are too many
68	>	* <p>The table is dynamically expanded when there are too many
69		* collisions (i.e., keys that have distinct hash codes but fall into
70		* the same slot modulo the table size), with the expected average
71		* effect of maintaining roughly two bins per mapping (corresponding
#	Line 85 | Line 86 | import java.io.Serializable;
86		* {@code hashCode()} is a sure way to slow down performance of any
87		* hash table.
88		*
89	<	* <p> A {@link Set} projection of a ConcurrentHashMap may be created
89	>	* <p>A {@link Set} projection of a ConcurrentHashMap may be created
90		* (using {@link #newKeySet()} or {@link #newKeySet(int)}), or viewed
91		* (using {@link #keySet(Object)} when only keys are of interest, and the
92		* mapped values are (perhaps transiently) not used or all take the
93		* same mapping value.
94		*
95	<	* <p> A ConcurrentHashMap can be used as scalable frequency map (a
96	<	* form of histogram or multiset) by using {@link LongAdder} values
97	<	* and initializing via {@link #computeIfAbsent}. For example, to add
98	<	* a count to a {@code ConcurrentHashMap<String,LongAdder> freqs}, you
99	<	* can use {@code freqs.computeIfAbsent(k -> new
100	<	* LongAdder()).increment();}
95	>	* <p>A ConcurrentHashMap can be used as scalable frequency map (a
96	>	* form of histogram or multiset) by using {@link
97	>	* java.util.concurrent.atomic.LongAdder} values and initializing via
98	>	* {@link #computeIfAbsent computeIfAbsent}. For example, to add a count
99	>	* to a {@code ConcurrentHashMap<String,LongAdder> freqs}, you can use
100	>	* {@code freqs.computeIfAbsent(k -> new LongAdder()).increment();}
101		*
102		* <p>This class and its views and iterators implement all of the
103		* <em>optional</em> methods of the {@link Map} and {@link Iterator}
104		* interfaces.
105		*
106	<	* <p> Like {@link Hashtable} but unlike {@link HashMap}, this class
106	>	* <p>Like {@link Hashtable} but unlike {@link HashMap}, this class
107		* does <em>not</em> allow {@code null} to be used as a key or value.
108		*
109	<	* <p>ConcurrentHashMaps support parallel operations using the {@link
110	<	* ForkJoinPool#commonPool}. (Tasks that may be used in other contexts
111	<	* are available in class {@link ForkJoinTasks}). These operations are
112	<	* designed to be safely, and often sensibly, applied even with maps
113	<	* that are being concurrently updated by other threads; for example,
114	<	* when computing a snapshot summary of the values in a shared
115	<	* registry.  There are three kinds of operation, each with four
116	<	* forms, accepting functions with Keys, Values, Entries, and (Key,
117	<	* Value) arguments and/or return values. (The first three forms are
118	<	* also available via the {@link #keySet()}, {@link #values()} and
119	<	* {@link #entrySet()} views). Because the elements of a
120	<	* ConcurrentHashMap are not ordered in any particular way, and may be
121	<	* processed in different orders in different parallel executions, the
122	<	* correctness of supplied functions should not depend on any
123	<	* ordering, or on any other objects or values that may transiently
124	<	* change while computation is in progress; and except for forEach
125	<	* actions, should ideally be side-effect-free.
109	>	* <p>ConcurrentHashMaps support sequential and parallel operations
110	>	* bulk operations. (Parallel forms use the {@link
111	>	* ForkJoinPool#commonPool()}). Tasks that may be used in other
112	>	* contexts are available in class {@link ForkJoinTasks}. These
113	>	* operations are designed to be safely, and often sensibly, applied
114	>	* even with maps that are being concurrently updated by other
115	>	* threads; for example, when computing a snapshot summary of the
116	>	* values in a shared registry.  There are three kinds of operation,
117	>	* each with four forms, accepting functions with Keys, Values,
118	>	* Entries, and (Key, Value) arguments and/or return values. Because
119	>	* the elements of a ConcurrentHashMap are not ordered in any
120	>	* particular way, and may be processed in different orders in
121	>	* different parallel executions, the correctness of supplied
122	>	* functions should not depend on any ordering, or on any other
123	>	* objects or values that may transiently change while computation is
124	>	* in progress; and except for forEach actions, should ideally be
125	>	* side-effect-free.
126		*
127		* <ul>
128		* <li> forEach: Perform a given action on each element.
#	Line 148 | Line 149 | import java.io.Serializable;
149		* <li> Reductions to scalar doubles, longs, and ints, using a
150		* given basis value.</li>
151		*
151	–	* </li>
152		* </ul>
153	+	* </li>
154		* </ul>
155		*
156		* <p>The concurrency properties of bulk operations follow
#	Line 187 | Line 188 | import java.io.Serializable;
188		* arguments can be supplied using {@code new
189		* AbstractMap.SimpleEntry(k,v)}.
190		*
191	<	* <p> Bulk operations may complete abruptly, throwing an
191	>	* <p>Bulk operations may complete abruptly, throwing an
192		* exception encountered in the application of a supplied
193		* function. Bear in mind when handling such exceptions that other
194		* concurrently executing functions could also have thrown
195		* exceptions, or would have done so if the first exception had
196		* not occurred.
197		*
198	<	* <p>Parallel speedups for bulk operations compared to sequential
199	<	* processing are common but not guaranteed.  Operations involving
200	<	* brief functions on small maps may execute more slowly than
201	<	* sequential loops if the underlying work to parallelize the
202	<	* computation is more expensive than the computation itself.
203	<	* Similarly, parallelization may not lead to much actual parallelism
204	<	* if all processors are busy performing unrelated tasks.
198	>	* <p>Speedups for parallel compared to sequential forms are common
199	>	* but not guaranteed.  Parallel operations involving brief functions
200	>	* on small maps may execute more slowly than sequential forms if the
201	>	* underlying work to parallelize the computation is more expensive
202	>	* than the computation itself.  Similarly, parallelization may not
203	>	* lead to much actual parallelism if all processors are busy
204	>	* performing unrelated tasks.
205		*
206	<	* <p> All arguments to all task methods must be non-null.
206	<	*
207	<	* <p><em>jsr166e note: During transition, this class
208	<	* uses nested functional interfaces with different names but the
209	<	* same forms as those expected for JDK8.<em>
206	>	* <p>All arguments to all task methods must be non-null.
207		*
208		* <p>This class is a member of the
209		* <a href="{@docRoot}/../technotes/guides/collections/index.html">
#	Line 217 | Line 214 | import java.io.Serializable;
214		* @param <K> the type of keys maintained by this map
215		* @param <V> the type of mapped values
216		*/
217	<	public class ConcurrentHashMap<K, V>
218	<	implements ConcurrentMap<K, V>, Serializable {
217	>	public class ConcurrentHashMap<K,V>
218	>	implements ConcurrentMap<K,V>, Serializable {
219		private static final long serialVersionUID = 7249069246763182397L;
220
224	–	/**
225	–	* A partitionable iterator. A Spliterator can be traversed
226	–	* directly, but can also be partitioned (before traversal) by
227	–	* creating another Spliterator that covers a non-overlapping
228	–	* portion of the elements, and so may be amenable to parallel
229	–	* execution.
230	–	*
231	–	* <p> This interface exports a subset of expected JDK8
232	–	* functionality.
233	–	*
234	–	* <p>Sample usage: Here is one (of the several) ways to compute
235	–	* the sum of the values held in a map using the ForkJoin
236	–	* framework. As illustrated here, Spliterators are well suited to
237	–	* designs in which a task repeatedly splits off half its work
238	–	* into forked subtasks until small enough to process directly,
239	–	* and then joins these subtasks. Variants of this style can also
240	–	* be used in completion-based designs.
241	–	*
242	–	* <pre>
243	–	* {@code ConcurrentHashMap<String, Long> m = ...
244	–	* // split as if have 8 * parallelism, for load balance
245	–	* int n = m.size();
246	–	* int p = aForkJoinPool.getParallelism() * 8;
247	–	* int split = (n < p)? n : p;
248	–	* long sum = aForkJoinPool.invoke(new SumValues(m.valueSpliterator(), split, null));
249	–	* // ...
250	–	* static class SumValues extends RecursiveTask<Long> {
251	–	*   final Spliterator<Long> s;
252	–	*   final int split;             // split while > 1
253	–	*   final SumValues nextJoin;    // records forked subtasks to join
254	–	*   SumValues(Spliterator<Long> s, int depth, SumValues nextJoin) {
255	–	*     this.s = s; this.depth = depth; this.nextJoin = nextJoin;
256	–	*   }
257	–	*   public Long compute() {
258	–	*     long sum = 0;
259	–	*     SumValues subtasks = null; // fork subtasks
260	–	*     for (int s = split >>> 1; s > 0; s >>>= 1)
261	–	*       (subtasks = new SumValues(s.split(), s, subtasks)).fork();
262	–	*     while (s.hasNext())        // directly process remaining elements
263	–	*       sum += s.next();
264	–	*     for (SumValues t = subtasks; t != null; t = t.nextJoin)
265	–	*       sum += t.join();         // collect subtask results
266	–	*     return sum;
267	–	*   }
268	–	* }
269	–	* }</pre>
270	–	*/
271	–	public static interface Spliterator<T> extends Iterator<T> {
272	–	/**
273	–	* Returns a Spliterator covering approximately half of the
274	–	* elements, guaranteed not to overlap with those subsequently
275	–	* returned by this Spliterator.  After invoking this method,
276	–	* the current Spliterator will <em>not</em> produce any of
277	–	* the elements of the returned Spliterator, but the two
278	–	* Spliterators together will produce all of the elements that
279	–	* would have been produced by this Spliterator had this
280	–	* method not been called. The exact number of elements
281	–	* produced by the returned Spliterator is not guaranteed, and
282	–	* may be zero (i.e., with {@code hasNext()} reporting {@code
283	–	* false}) if this Spliterator cannot be further split.
284	–	*
285	–	* @return a Spliterator covering approximately half of the
286	–	* elements
287	–	* @throws IllegalStateException if this Spliterator has
288	–	* already commenced traversing elements
289	–	*/
290	–	Spliterator<T> split();
291	–	}
292	–
293	–
221		/*
222		* Overview:
223		*
#	Line 301 | Line 228 | public class ConcurrentHashMap<K, V>
228		* the same or better than java.util.HashMap, and to support high
229		* initial insertion rates on an empty table by many threads.
230		*
231	<	* Each key-value mapping is held in a Node.  Because Node fields
232	<	* can contain special values, they are defined using plain Object
233	<	* types. Similarly in turn, all internal methods that use them
234	<	* work off Object types. And similarly, so do the internal
235	<	* methods of auxiliary iterator and view classes.  All public
236	<	* generic typed methods relay in/out of these internal methods,
237	<	* supplying null-checks and casts as needed. This also allows
238	<	* many of the public methods to be factored into a smaller number
239	<	* of internal methods (although sadly not so for the five
313	<	* variants of put-related operations). The validation-based
314	<	* approach explained below leads to a lot of code sprawl because
231	>	* Each key-value mapping is held in a Node.  Because Node key
232	>	* fields can contain special values, they are defined using plain
233	>	* Object types (not type "K"). This leads to a lot of explicit
234	>	* casting (and many explicit warning suppressions to tell
235	>	* compilers not to complain about it). It also allows some of the
236	>	* public methods to be factored into a smaller number of internal
237	>	* methods (although sadly not so for the five variants of
238	>	* put-related operations). The validation-based approach
239	>	* explained below leads to a lot of code sprawl because
240		* retry-control precludes factoring into smaller methods.
241		*
242		* The table is lazily initialized to a power-of-two size upon the
#	Line 325 | Line 250 | public class ConcurrentHashMap<K, V>
250		* as lookups check hash code and non-nullness of value before
251		* checking key equality.
252		*
253	<	* We use the top two bits of Node hash fields for control
254	<	* purposes -- they are available anyway because of addressing
255	<	* constraints.  As explained further below, these top bits are
256	<	* used as follows:
257	<	*  00 - Normal
258	<	*  01 - Locked
334	<	*  11 - Locked and may have a thread waiting for lock
335	<	*  10 - Node is a forwarding node
336	<	*
337	<	* The lower 30 bits of each Node's hash field contain a
338	<	* transformation of the key's hash code, except for forwarding
339	<	* nodes, for which the lower bits are zero (and so always have
340	<	* hash field == MOVED).
253	>	* We use the top (sign) bit of Node hash fields for control
254	>	* purposes -- it is available anyway because of addressing
255	>	* constraints.  Nodes with negative hash fields are forwarding
256	>	* nodes to either TreeBins or resized tables.  The lower 31 bits
257	>	* of each normal Node's hash field contain a transformation of
258	>	* the key's hash code.
259		*
260		* Insertion (via put or its variants) of the first node in an
261		* empty bin is performed by just CASing it to the bin.  This is
#	Line 346 | Line 264 | public class ConcurrentHashMap<K, V>
264		* delete, and replace) require locks.  We do not want to waste
265		* the space required to associate a distinct lock object with
266		* each bin, so instead use the first node of a bin list itself as
267	<	* a lock. Blocking support for these locks relies on the builtin
268	<	* "synchronized" monitors.  However, we also need a tryLock
351	<	* construction, so we overlay these by using bits of the Node
352	<	* hash field for lock control (see above), and so normally use
353	<	* builtin monitors only for blocking and signalling using
354	<	* wait/notifyAll constructions. See Node.tryAwaitLock.
267	>	* a lock. Locking support for these locks relies on builtin
268	>	* "synchronized" monitors.
269		*
270		* Using the first node of a list as a lock does not by itself
271		* suffice though: When a node is locked, any update must first
#	Line 413 | Line 327 | public class ConcurrentHashMap<K, V>
327		* iterators in the same way.
328		*
329		* The table is resized when occupancy exceeds a percentage
330	<	* threshold (nominally, 0.75, but see below).  Only a single
331	<	* thread performs the resize (using field "sizeCtl", to arrange
332	<	* exclusion), but the table otherwise remains usable for reads
333	<	* and updates. Resizing proceeds by transferring bins, one by
334	<	* one, from the table to the next table.  Because we are using
335	<	* power-of-two expansion, the elements from each bin must either
336	<	* stay at same index, or move with a power of two offset. We
337	<	* eliminate unnecessary node creation by catching cases where old
338	<	* nodes can be reused because their next fields won't change.  On
339	<	* average, only about one-sixth of them need cloning when a table
340	<	* doubles. The nodes they replace will be garbage collectable as
341	<	* soon as they are no longer referenced by any reader thread that
342	<	* may be in the midst of concurrently traversing table.  Upon
343	<	* transfer, the old table bin contains only a special forwarding
344	<	* node (with hash field "MOVED") that contains the next table as
345	<	* its key. On encountering a forwarding node, access and update
346	<	* operations restart, using the new table.
347	<	*
348	<	* Each bin transfer requires its bin lock. However, unlike other
349	<	* cases, a transfer can skip a bin if it fails to acquire its
350	<	* lock, and revisit it later (unless it is a TreeBin). Method
351	<	* rebuild maintains a buffer of TRANSFER_BUFFER_SIZE bins that
352	<	* have been skipped because of failure to acquire a lock, and
353	<	* blocks only if none are available (i.e., only very rarely).
354	<	* The transfer operation must also ensure that all accessible
355	<	* bins in both the old and new table are usable by any traversal.
356	<	* When there are no lock acquisition failures, this is arranged
357	<	* simply by proceeding from the last bin (table.length - 1) up
358	<	* towards the first.  Upon seeing a forwarding node, traversals
359	<	* (see class Iter) arrange to move to the new table
360	<	* without revisiting nodes.  However, when any node is skipped
361	<	* during a transfer, all earlier table bins may have become
362	<	* visible, so are initialized with a reverse-forwarding node back
363	<	* to the old table until the new ones are established. (This
364	<	* sometimes requires transiently locking a forwarding node, which
365	<	* is possible under the above encoding.) These more expensive
366	<	* mechanics trigger only when necessary.
330	>	* threshold (nominally, 0.75, but see below).  Any thread
331	>	* noticing an overfull bin may assist in resizing after the
332	>	* initiating thread allocates and sets up the replacement
333	>	* array. However, rather than stalling, these other threads may
334	>	* proceed with insertions etc.  The use of TreeBins shields us
335	>	* from the worst case effects of overfilling while resizes are in
336	>	* progress.  Resizing proceeds by transferring bins, one by one,
337	>	* from the table to the next table. To enable concurrency, the
338	>	* next table must be (incrementally) prefilled with place-holders
339	>	* serving as reverse forwarders to the old table.  Because we are
340	>	* using power-of-two expansion, the elements from each bin must
341	>	* either stay at same index, or move with a power of two
342	>	* offset. We eliminate unnecessary node creation by catching
343	>	* cases where old nodes can be reused because their next fields
344	>	* won't change.  On average, only about one-sixth of them need
345	>	* cloning when a table doubles. The nodes they replace will be
346	>	* garbage collectable as soon as they are no longer referenced by
347	>	* any reader thread that may be in the midst of concurrently
348	>	* traversing table.  Upon transfer, the old table bin contains
349	>	* only a special forwarding node (with hash field "MOVED") that
350	>	* contains the next table as its key. On encountering a
351	>	* forwarding node, access and update operations restart, using
352	>	* the new table.
353	>	*
354	>	* Each bin transfer requires its bin lock, which can stall
355	>	* waiting for locks while resizing. However, because other
356	>	* threads can join in and help resize rather than contend for
357	>	* locks, average aggregate waits become shorter as resizing
358	>	* progresses.  The transfer operation must also ensure that all
359	>	* accessible bins in both the old and new table are usable by any
360	>	* traversal.  This is arranged by proceeding from the last bin
361	>	* (table.length - 1) up towards the first.  Upon seeing a
362	>	* forwarding node, traversals (see class Traverser) arrange to
363	>	* move to the new table without revisiting nodes.  However, to
364	>	* ensure that no intervening nodes are skipped, bin splitting can
365	>	* only begin after the associated reverse-forwarders are in
366	>	* place.
367		*
368		* The traversal scheme also applies to partial traversals of
369		* ranges of bins (via an alternate Traverser constructor)
#	Line 464 | Line 378 | public class ConcurrentHashMap<K, V>
378		* These cases attempt to override the initial capacity settings,
379		* but harmlessly fail to take effect in cases of races.
380		*
381	<	* The element count is maintained using a LongAdder, which avoids
382	<	* contention on updates but can encounter cache thrashing if read
383	<	* too frequently during concurrent access. To avoid reading so
384	<	* often, resizing is attempted either when a bin lock is
385	<	* contended, or upon adding to a bin already holding two or more
386	<	* nodes (checked before adding in the xIfAbsent methods, after
387	<	* adding in others). Under uniform hash distributions, the
388	<	* probability of this occurring at threshold is around 13%,
389	<	* meaning that only about 1 in 8 puts check threshold (and after
390	<	* resizing, many fewer do so). But this approximation has high
391	<	* variance for small table sizes, so we check on any collision
392	<	* for sizes <= 64. The bulk putAll operation further reduces
393	<	* contention by only committing count updates upon these size
394	<	* checks.
381	>	* The element count is maintained using a specialization of
382	>	* LongAdder. We need to incorporate a specialization rather than
383	>	* just use a LongAdder in order to access implicit
384	>	* contention-sensing that leads to creation of multiple
385	>	* Cells.  The counter mechanics avoid contention on
386	>	* updates but can encounter cache thrashing if read too
387	>	* frequently during concurrent access. To avoid reading so often,
388	>	* resizing under contention is attempted only upon adding to a
389	>	* bin already holding two or more nodes. Under uniform hash
390	>	* distributions, the probability of this occurring at threshold
391	>	* is around 13%, meaning that only about 1 in 8 puts check
392	>	* threshold (and after resizing, many fewer do so). The bulk
393	>	* putAll operation further reduces contention by only committing
394	>	* count updates upon these size checks.
395		*
396		* Maintaining API and serialization compatibility with previous
397		* versions of this class introduces several oddities. Mainly: We
#	Line 528 | Line 442 | public class ConcurrentHashMap<K, V>
442		private static final float LOAD_FACTOR = 0.75f;
443
444		/**
531	–	* The buffer size for skipped bins during transfers. The
532	–	* value is arbitrary but should be large enough to avoid
533	–	* most locking stalls during resizes.
534	–	*/
535	–	private static final int TRANSFER_BUFFER_SIZE = 32;
536	–
537	–	/**
445		* The bin count threshold for using a tree rather than list for a
446		* bin.  The value reflects the approximate break-even point for
447		* using tree-based operations.
448		*/
449		private static final int TREE_THRESHOLD = 8;
450
451	+	/**
452	+	* Minimum number of rebinnings per transfer step. Ranges are
453	+	* subdivided to allow multiple resizer threads.  This value
454	+	* serves as a lower bound to avoid resizers encountering
455	+	* excessive memory contention.  The value should be at least
456	+	* DEFAULT_CAPACITY.
457	+	*/
458	+	private static final int MIN_TRANSFER_STRIDE = 16;
459	+
460		/*
461	<	* Encodings for special uses of Node hash fields. See above for
546	<	* explanation.
461	>	* Encodings for Node hash fields. See above for explanation.
462		*/
463		static final int MOVED     = 0x80000000; // hash field for forwarding nodes
464	<	static final int LOCKED    = 0x40000000; // set/tested only as a bit
465	<	static final int WAITING   = 0xc0000000; // both bits set/tested together
466	<	static final int HASH_BITS = 0x3fffffff; // usable bits of normal node hash
464	>	static final int HASH_BITS = 0x7fffffff; // usable bits of normal node hash
465	>
466	>	/** Number of CPUS, to place bounds on some sizings */
467	>	static final int NCPU = Runtime.getRuntime().availableProcessors();
468	>
469	>	/* ---------------- Counters -------------- */
470	>
471	>	// Adapted from LongAdder and Striped64.
472	>	// See their internal docs for explanation.
473	>
474	>	// A padded cell for distributing counts
475	>	static final class Cell {
476	>	volatile long p0, p1, p2, p3, p4, p5, p6;
477	>	volatile long value;
478	>	volatile long q0, q1, q2, q3, q4, q5, q6;
479	>	Cell(long x) { value = x; }
480	>	}
481
482		/* ---------------- Fields -------------- */
483
#	Line 556 | Line 485 | public class ConcurrentHashMap<K, V>
485		* The array of bins. Lazily initialized upon first insertion.
486		* Size is always a power of two. Accessed directly by iterators.
487		*/
488	<	transient volatile Node[] table;
488	>	transient volatile Node<V>[] table;
489	>
490	>	/**
491	>	* The next table to use; non-null only while resizing.
492	>	*/
493	>	private transient volatile Node<V>[] nextTable;
494
495		/**
496	<	* The counter maintaining number of elements.
496	>	* Base counter value, used mainly when there is no contention,
497	>	* but also as a fallback during table initialization
498	>	* races. Updated via CAS.
499		*/
500	<	private transient final LongAdder counter;
500	>	private transient volatile long baseCount;
501
502		/**
503		* Table initialization and resizing control.  When negative, the
504	<	* table is being initialized or resized. Otherwise, when table is
505	<	* null, holds the initial table size to use upon creation, or 0
506	<	* for default. After initialization, holds the next element count
507	<	* value upon which to resize the table.
504	>	* table is being initialized or resized: -1 for initialization,
505	>	* else -(1 + the number of active resizing threads).  Otherwise,
506	>	* when table is null, holds the initial table size to use upon
507	>	* creation, or 0 for default. After initialization, holds the
508	>	* next element count value upon which to resize the table.
509		*/
510		private transient volatile int sizeCtl;
511
512	+	/**
513	+	* The next table index (plus one) to split while resizing.
514	+	*/
515	+	private transient volatile int transferIndex;
516	+
517	+	/**
518	+	* The least available table index to split while resizing.
519	+	*/
520	+	private transient volatile int transferOrigin;
521	+
522	+	/**
523	+	* Spinlock (locked via CAS) used when resizing and/or creating Cells.
524	+	*/
525	+	private transient volatile int cellsBusy;
526	+
527	+	/**
528	+	* Table of counter cells. When non-null, size is a power of 2.
529	+	*/
530	+	private transient volatile Cell[] counterCells;
531	+
532		// views
533		private transient KeySetView<K,V> keySet;
534		private transient ValuesView<K,V> values;
#	Line 594 | Line 551 | public class ConcurrentHashMap<K, V>
551		* inline assignments below.
552		*/
553
554	<	static final Node tabAt(Node[] tab, int i) { // used by Iter
555	<	return (Node)UNSAFE.getObjectVolatile(tab, ((long)i<<ASHIFT)+ABASE);
554	>	@SuppressWarnings("unchecked") static final <V> Node<V> tabAt
555	>	(Node<V>[] tab, int i) { // used by Traverser
556	>	return (Node<V>)U.getObjectVolatile(tab, ((long)i << ASHIFT) + ABASE);
557		}
558
559	<	private static final boolean casTabAt(Node[] tab, int i, Node c, Node v) {
560	<	return UNSAFE.compareAndSwapObject(tab, ((long)i<<ASHIFT)+ABASE, c, v);
559	>	private static final <V> boolean casTabAt
560	>	(Node<V>[] tab, int i, Node<V> c, Node<V> v) {
561	>	return U.compareAndSwapObject(tab, ((long)i << ASHIFT) + ABASE, c, v);
562		}
563
564	<	private static final void setTabAt(Node[] tab, int i, Node v) {
565	<	UNSAFE.putObjectVolatile(tab, ((long)i<<ASHIFT)+ABASE, v);
564	>	private static final <V> void setTabAt
565	>	(Node<V>[] tab, int i, Node<V> v) {
566	>	U.putObjectVolatile(tab, ((long)i << ASHIFT) + ABASE, v);
567		}
568
569		/* ---------------- Nodes -------------- */
#	Line 618 | Line 578 | public class ConcurrentHashMap<K, V>
578		* before a val, but can only be used after checking val to be
579		* non-null.
580		*/
581	<	static class Node {
582	<	volatile int hash;
581	>	static class Node<V> {
582	>	final int hash;
583		final Object key;
584	<	volatile Object val;
585	<	volatile Node next;
584	>	volatile V val;
585	>	volatile Node<V> next;
586
587	<	Node(int hash, Object key, Object val, Node next) {
587	>	Node(int hash, Object key, V val, Node<V> next) {
588		this.hash = hash;
589		this.key = key;
590		this.val = val;
591		this.next = next;
592		}
633	–
634	–	/** CompareAndSet the hash field */
635	–	final boolean casHash(int cmp, int val) {
636	–	return UNSAFE.compareAndSwapInt(this, hashOffset, cmp, val);
637	–	}
638	–
639	–	/** The number of spins before blocking for a lock */
640	–	static final int MAX_SPINS =
641	–	Runtime.getRuntime().availableProcessors() > 1 ? 64 : 1;
642	–
643	–	/**
644	–	* Spins a while if LOCKED bit set and this node is the first
645	–	* of its bin, and then sets WAITING bits on hash field and
646	–	* blocks (once) if they are still set.  It is OK for this
647	–	* method to return even if lock is not available upon exit,
648	–	* which enables these simple single-wait mechanics.
649	–	*
650	–	* The corresponding signalling operation is performed within
651	–	* callers: Upon detecting that WAITING has been set when
652	–	* unlocking lock (via a failed CAS from non-waiting LOCKED
653	–	* state), unlockers acquire the sync lock and perform a
654	–	* notifyAll.
655	–	*
656	–	* The initial sanity check on tab and bounds is not currently
657	–	* necessary in the only usages of this method, but enables
658	–	* use in other future contexts.
659	–	*/
660	–	final void tryAwaitLock(Node[] tab, int i) {
661	–	if (tab != null && i >= 0 && i < tab.length) { // sanity check
662	–	int r = ThreadLocalRandom.current().nextInt(); // randomize spins
663	–	int spins = MAX_SPINS, h;
664	–	while (tabAt(tab, i) == this && ((h = hash) & LOCKED) != 0) {
665	–	if (spins >= 0) {
666	–	r ^= r << 1; r ^= r >>> 3; r ^= r << 10; // xorshift
667	–	if (r >= 0 && --spins == 0)
668	–	Thread.yield();  // yield before block
669	–	}
670	–	else if (casHash(h, h | WAITING)) {
671	–	synchronized (this) {
672	–	if (tabAt(tab, i) == this &&
673	–	(hash & WAITING) == WAITING) {
674	–	try {
675	–	wait();
676	–	} catch (InterruptedException ie) {
677	–	try {
678	–	Thread.currentThread().interrupt();
679	–	} catch (SecurityException ignore) {
680	–	}
681	–	}
682	–	}
683	–	else
684	–	notifyAll(); // possibly won race vs signaller
685	–	}
686	–	break;
687	–	}
688	–	}
689	–	}
690	–	}
691	–
692	–	// Unsafe mechanics for casHash
693	–	private static final sun.misc.Unsafe UNSAFE;
694	–	private static final long hashOffset;
695	–
696	–	static {
697	–	try {
698	–	UNSAFE = sun.misc.Unsafe.getUnsafe();
699	–	Class<?> k = Node.class;
700	–	hashOffset = UNSAFE.objectFieldOffset
701	–	(k.getDeclaredField("hash"));
702	–	} catch (Exception e) {
703	–	throw new Error(e);
704	–	}
705	–	}
593		}
594
595		/* ---------------- TreeBins -------------- */
#	Line 710 | Line 597 | public class ConcurrentHashMap<K, V>
597		/**
598		* Nodes for use in TreeBins
599		*/
600	<	static final class TreeNode extends Node {
601	<	TreeNode parent;  // red-black tree links
602	<	TreeNode left;
603	<	TreeNode right;
604	<	TreeNode prev;    // needed to unlink next upon deletion
600	>	static final class TreeNode<V> extends Node<V> {
601	>	TreeNode<V> parent;  // red-black tree links
602	>	TreeNode<V> left;
603	>	TreeNode<V> right;
604	>	TreeNode<V> prev;    // needed to unlink next upon deletion
605		boolean red;
606
607	<	TreeNode(int hash, Object key, Object val, Node next, TreeNode parent) {
607	>	TreeNode(int hash, Object key, V val, Node<V> next, TreeNode<V> parent) {
608		super(hash, key, val, next);
609		this.parent = parent;
610		}
#	Line 766 | Line 653 | public class ConcurrentHashMap<K, V>
653		* and writers. Since we don't need to export full Lock API, we
654		* just override the minimal AQS methods and use them directly.
655		*/
656	<	static final class TreeBin extends AbstractQueuedSynchronizer {
656	>	static final class TreeBin<V> extends AbstractQueuedSynchronizer {
657		private static final long serialVersionUID = 2249069246763182397L;
658	<	transient TreeNode root;  // root of tree
659	<	transient TreeNode first; // head of next-pointer list
658	>	transient TreeNode<V> root;  // root of tree
659	>	transient TreeNode<V> first; // head of next-pointer list
660
661		/* AQS overrides */
662		public final boolean isHeldExclusively() { return getState() > 0; }
#	Line 800 | Line 687 | public class ConcurrentHashMap<K, V>
687		}
688
689		/** From CLR */
690	<	private void rotateLeft(TreeNode p) {
690	>	private void rotateLeft(TreeNode<V> p) {
691		if (p != null) {
692	<	TreeNode r = p.right, pp, rl;
692	>	TreeNode<V> r = p.right, pp, rl;
693		if ((rl = p.right = r.left) != null)
694		rl.parent = p;
695		if ((pp = r.parent = p.parent) == null)
#	Line 817 | Line 704 | public class ConcurrentHashMap<K, V>
704		}
705
706		/** From CLR */
707	<	private void rotateRight(TreeNode p) {
707	>	private void rotateRight(TreeNode<V> p) {
708		if (p != null) {
709	<	TreeNode l = p.left, pp, lr;
709	>	TreeNode<V> l = p.left, pp, lr;
710		if ((lr = p.left = l.right) != null)
711		lr.parent = p;
712		if ((pp = l.parent = p.parent) == null)
#	Line 837 | Line 724 | public class ConcurrentHashMap<K, V>
724		* Returns the TreeNode (or null if not found) for the given key
725		* starting at given root.
726		*/
727	<	@SuppressWarnings("unchecked") final TreeNode getTreeNode
728	<	(int h, Object k, TreeNode p) {
727	>	@SuppressWarnings("unchecked") final TreeNode<V> getTreeNode
728	>	(int h, Object k, TreeNode<V> p) {
729		Class<?> c = k.getClass();
730		while (p != null) {
731		int dir, ph;  Object pk; Class<?> pc;
#	Line 848 | Line 735 | public class ConcurrentHashMap<K, V>
735		if (c != (pc = pk.getClass()) ||
736		!(k instanceof Comparable) ||
737		(dir = ((Comparable)k).compareTo((Comparable)pk)) == 0) {
738	<	dir = (c == pc) ? 0 : c.getName().compareTo(pc.getName());
739	<	TreeNode r = null, s = null, pl, pr;
740	<	if (dir >= 0) {
741	<	if ((pl = p.left) != null && h <= pl.hash)
742	<	s = pl;
738	>	if ((dir = (c == pc) ? 0 :
739	>	c.getName().compareTo(pc.getName())) == 0) {
740	>	TreeNode<V> r = null, pl, pr; // check both sides
741	>	if ((pr = p.right) != null && h >= pr.hash &&
742	>	(r = getTreeNode(h, k, pr)) != null)
743	>	return r;
744	>	else if ((pl = p.left) != null && h <= pl.hash)
745	>	dir = -1;
746	>	else // nothing there
747	>	return null;
748		}
857	–	else if ((pr = p.right) != null && h >= pr.hash)
858	–	s = pr;
859	–	if (s != null && (r = getTreeNode(h, k, s)) != null)
860	–	return r;
749		}
750		}
751		else
#	Line 872 | Line 760 | public class ConcurrentHashMap<K, V>
760		* read-lock to call getTreeNode, but during failure to get
761		* lock, searches along next links.
762		*/
763	<	final Object getValue(int h, Object k) {
764	<	Node r = null;
763	>	final V getValue(int h, Object k) {
764	>	Node<V> r = null;
765		int c = getState(); // Must read lock state first
766	<	for (Node e = first; e != null; e = e.next) {
766	>	for (Node<V> e = first; e != null; e = e.next) {
767		if (c <= 0 && compareAndSetState(c, c - 1)) {
768		try {
769		r = getTreeNode(h, k, root);
#	Line 884 | Line 772 | public class ConcurrentHashMap<K, V>
772		}
773		break;
774		}
775	<	else if ((e.hash & HASH_BITS) == h && k.equals(e.key)) {
775	>	else if (e.hash == h && k.equals(e.key)) {
776		r = e;
777		break;
778		}
#	Line 898 | Line 786 | public class ConcurrentHashMap<K, V>
786		* Finds or adds a node.
787		* @return null if added
788		*/
789	<	@SuppressWarnings("unchecked") final TreeNode putTreeNode
790	<	(int h, Object k, Object v) {
789	>	@SuppressWarnings("unchecked") final TreeNode<V> putTreeNode
790	>	(int h, Object k, V v) {
791		Class<?> c = k.getClass();
792	<	TreeNode pp = root, p = null;
792	>	TreeNode<V> pp = root, p = null;
793		int dir = 0;
794		while (pp != null) { // find existing node or leaf to insert at
795		int ph;  Object pk; Class<?> pc;
#	Line 912 | Line 800 | public class ConcurrentHashMap<K, V>
800		if (c != (pc = pk.getClass()) ||
801		!(k instanceof Comparable) ||
802		(dir = ((Comparable)k).compareTo((Comparable)pk)) == 0) {
803	<	dir = (c == pc) ? 0 : c.getName().compareTo(pc.getName());
804	<	TreeNode r = null, s = null, pl, pr;
805	<	if (dir >= 0) {
806	<	if ((pl = p.left) != null && h <= pl.hash)
807	<	s = pl;
803	>	TreeNode<V> s = null, r = null, pr;
804	>	if ((dir = (c == pc) ? 0 :
805	>	c.getName().compareTo(pc.getName())) == 0) {
806	>	if ((pr = p.right) != null && h >= pr.hash &&
807	>	(r = getTreeNode(h, k, pr)) != null)
808	>	return r;
809	>	else // continue left
810	>	dir = -1;
811		}
812		else if ((pr = p.right) != null && h >= pr.hash)
813		s = pr;
#	Line 929 | Line 820 | public class ConcurrentHashMap<K, V>
820		pp = (dir > 0) ? p.right : p.left;
821		}
822
823	<	TreeNode f = first;
824	<	TreeNode x = first = new TreeNode(h, k, v, f, p);
823	>	TreeNode<V> f = first;
824	>	TreeNode<V> x = first = new TreeNode<V>(h, k, v, f, p);
825		if (p == null)
826		root = x;
827		else { // attach and rebalance; adapted from CLR
828	<	TreeNode xp, xpp;
828	>	TreeNode<V> xp, xpp;
829		if (f != null)
830		f.prev = x;
831		if (dir <= 0)
#	Line 944 | Line 835 | public class ConcurrentHashMap<K, V>
835		x.red = true;
836		while (x != null && (xp = x.parent) != null && xp.red &&
837		(xpp = xp.parent) != null) {
838	<	TreeNode xppl = xpp.left;
838	>	TreeNode<V> xppl = xpp.left;
839		if (xp == xppl) {
840	<	TreeNode y = xpp.right;
840	>	TreeNode<V> y = xpp.right;
841		if (y != null && y.red) {
842		y.red = false;
843		xp.red = false;
#	Line 968 | Line 859 | public class ConcurrentHashMap<K, V>
859		}
860		}
861		else {
862	<	TreeNode y = xppl;
862	>	TreeNode<V> y = xppl;
863		if (y != null && y.red) {
864		y.red = false;
865		xp.red = false;
#	Line 990 | Line 881 | public class ConcurrentHashMap<K, V>
881		}
882		}
883		}
884	<	TreeNode r = root;
884	>	TreeNode<V> r = root;
885		if (r != null && r.red)
886		r.red = false;
887		}
#	Line 1005 | Line 896 | public class ConcurrentHashMap<K, V>
896		* that are accessible independently of lock. So instead we
897		* swap the tree linkages.
898		*/
899	<	final void deleteTreeNode(TreeNode p) {
900	<	TreeNode next = (TreeNode)p.next; // unlink traversal pointers
901	<	TreeNode pred = p.prev;
899	>	final void deleteTreeNode(TreeNode<V> p) {
900	>	TreeNode<V> next = (TreeNode<V>)p.next; // unlink traversal pointers
901	>	TreeNode<V> pred = p.prev;
902		if (pred == null)
903		first = next;
904		else
905		pred.next = next;
906		if (next != null)
907		next.prev = pred;
908	<	TreeNode replacement;
909	<	TreeNode pl = p.left;
910	<	TreeNode pr = p.right;
908	>	TreeNode<V> replacement;
909	>	TreeNode<V> pl = p.left;
910	>	TreeNode<V> pr = p.right;
911		if (pl != null && pr != null) {
912	<	TreeNode s = pr, sl;
912	>	TreeNode<V> s = pr, sl;
913		while ((sl = s.left) != null) // find successor
914		s = sl;
915		boolean c = s.red; s.red = p.red; p.red = c; // swap colors
916	<	TreeNode sr = s.right;
917	<	TreeNode pp = p.parent;
916	>	TreeNode<V> sr = s.right;
917	>	TreeNode<V> pp = p.parent;
918		if (s == pr) { // p was s's direct parent
919		p.parent = s;
920		s.right = p;
921		}
922		else {
923	<	TreeNode sp = s.parent;
923	>	TreeNode<V> sp = s.parent;
924		if ((p.parent = sp) != null) {
925		if (s == sp.left)
926		sp.left = p;
#	Line 1054 | Line 945 | public class ConcurrentHashMap<K, V>
945		}
946		else
947		replacement = (pl != null) ? pl : pr;
948	<	TreeNode pp = p.parent;
948	>	TreeNode<V> pp = p.parent;
949		if (replacement == null) {
950		if (pp == null) {
951		root = null;
#	Line 1073 | Line 964 | public class ConcurrentHashMap<K, V>
964		p.left = p.right = p.parent = null;
965		}
966		if (!p.red) { // rebalance, from CLR
967	<	TreeNode x = replacement;
967	>	TreeNode<V> x = replacement;
968		while (x != null) {
969	<	TreeNode xp, xpl;
969	>	TreeNode<V> xp, xpl;
970		if (x.red || (xp = x.parent) == null) {
971		x.red = false;
972		break;
973		}
974		if (x == (xpl = xp.left)) {
975	<	TreeNode sib = xp.right;
975	>	TreeNode<V> sib = xp.right;
976		if (sib != null && sib.red) {
977		sib.red = false;
978		xp.red = true;
#	Line 1091 | Line 982 | public class ConcurrentHashMap<K, V>
982		if (sib == null)
983		x = xp;
984		else {
985	<	TreeNode sl = sib.left, sr = sib.right;
985	>	TreeNode<V> sl = sib.left, sr = sib.right;
986		if ((sr == null || !sr.red) &&
987		(sl == null || !sl.red)) {
988		sib.red = true;
#	Line 1103 | Line 994 | public class ConcurrentHashMap<K, V>
994		sl.red = false;
995		sib.red = true;
996		rotateRight(sib);
997	<	sib = (xp = x.parent) == null ? null : xp.right;
997	>	sib = (xp = x.parent) == null ?
998	>	null : xp.right;
999		}
1000		if (sib != null) {
1001		sib.red = (xp == null) ? false : xp.red;
#	Line 1119 | Line 1011 | public class ConcurrentHashMap<K, V>
1011		}
1012		}
1013		else { // symmetric
1014	<	TreeNode sib = xpl;
1014	>	TreeNode<V> sib = xpl;
1015		if (sib != null && sib.red) {
1016		sib.red = false;
1017		xp.red = true;
#	Line 1129 | Line 1021 | public class ConcurrentHashMap<K, V>
1021		if (sib == null)
1022		x = xp;
1023		else {
1024	<	TreeNode sl = sib.left, sr = sib.right;
1024	>	TreeNode<V> sl = sib.left, sr = sib.right;
1025		if ((sl == null || !sl.red) &&
1026		(sr == null || !sr.red)) {
1027		sib.red = true;
#	Line 1141 | Line 1033 | public class ConcurrentHashMap<K, V>
1033		sr.red = false;
1034		sib.red = true;
1035		rotateLeft(sib);
1036	<	sib = (xp = x.parent) == null ? null : xp.left;
1036	>	sib = (xp = x.parent) == null ?
1037	>	null : xp.left;
1038		}
1039		if (sib != null) {
1040		sib.red = (xp == null) ? false : xp.red;
#	Line 1171 | Line 1064 | public class ConcurrentHashMap<K, V>
1064		/* ---------------- Collision reduction methods -------------- */
1065
1066		/**
1067	<	* Spreads higher bits to lower, and also forces top 2 bits to 0.
1067	>	* Spreads higher bits to lower, and also forces top bit to 0.
1068		* Because the table uses power-of-two masking, sets of hashes
1069		* that vary only in bits above the current mask will always
1070		* collide. (Among known examples are sets of Float keys holding
#	Line 1189 | Line 1082 | public class ConcurrentHashMap<K, V>
1082		}
1083
1084		/**
1085	<	* Replaces a list bin with a tree bin. Call only when locked.
1086	<	* Fails to replace if the given key is non-comparable or table
1087	<	* is, or needs, resizing.
1088	<	*/
1089	<	private final void replaceWithTreeBin(Node[] tab, int index, Object key) {
1090	<	if ((key instanceof Comparable) &&
1091	<	(tab.length >= MAXIMUM_CAPACITY || counter.sum() < (long)sizeCtl)) {
1092	<	TreeBin t = new TreeBin();
1093	<	for (Node e = tabAt(tab, index); e != null; e = e.next)
1201	<	t.putTreeNode(e.hash & HASH_BITS, e.key, e.val);
1202	<	setTabAt(tab, index, new Node(MOVED, t, null, null));
1085	>	* Replaces a list bin with a tree bin if key is comparable.  Call
1086	>	* only when locked.
1087	>	*/
1088	>	private final void replaceWithTreeBin(Node<V>[] tab, int index, Object key) {
1089	>	if (key instanceof Comparable) {
1090	>	TreeBin<V> t = new TreeBin<V>();
1091	>	for (Node<V> e = tabAt(tab, index); e != null; e = e.next)
1092	>	t.putTreeNode(e.hash, e.key, e.val);
1093	>	setTabAt(tab, index, new Node<V>(MOVED, t, null, null));
1094		}
1095		}
1096
1097		/* ---------------- Internal access and update methods -------------- */
1098
1099		/** Implementation for get and containsKey */
1100	<	private final Object internalGet(Object k) {
1100	>	@SuppressWarnings("unchecked") private final V internalGet(Object k) {
1101		int h = spread(k.hashCode());
1102	<	retry: for (Node[] tab = table; tab != null;) {
1103	<	Node e, p; Object ek, ev; int eh;      // locals to read fields once
1102	>	retry: for (Node<V>[] tab = table; tab != null;) {
1103	>	Node<V> e; Object ek; V ev; int eh; // locals to read fields once
1104		for (e = tabAt(tab, (tab.length - 1) & h); e != null; e = e.next) {
1105	<	if ((eh = e.hash) == MOVED) {
1105	>	if ((eh = e.hash) < 0) {
1106		if ((ek = e.key) instanceof TreeBin)  // search TreeBin
1107	<	return ((TreeBin)ek).getValue(h, k);
1108	<	else {                        // restart with new table
1109	<	tab = (Node[])ek;
1107	>	return ((TreeBin<V>)ek).getValue(h, k);
1108	>	else {                      // restart with new table
1109	>	tab = (Node<V>[])ek;
1110		continue retry;
1111		}
1112		}
1113	<	else if ((eh & HASH_BITS) == h && (ev = e.val) != null &&
1113	>	else if (eh == h && (ev = e.val) != null &&
1114		((ek = e.key) == k || k.equals(ek)))
1115		return ev;
1116		}
#	Line 1233 | Line 1124 | public class ConcurrentHashMap<K, V>
1124		* Replaces node value with v, conditional upon match of cv if
1125		* non-null.  If resulting value is null, delete.
1126		*/
1127	<	private final Object internalReplace(Object k, Object v, Object cv) {
1127	>	@SuppressWarnings("unchecked") private final V internalReplace
1128	>	(Object k, V v, Object cv) {
1129		int h = spread(k.hashCode());
1130	<	Object oldVal = null;
1131	<	for (Node[] tab = table;;) {
1132	<	Node f; int i, fh; Object fk;
1130	>	V oldVal = null;
1131	>	for (Node<V>[] tab = table;;) {
1132	>	Node<V> f; int i, fh; Object fk;
1133		if (tab == null ||
1134		(f = tabAt(tab, i = (tab.length - 1) & h)) == null)
1135		break;
1136	<	else if ((fh = f.hash) == MOVED) {
1136	>	else if ((fh = f.hash) < 0) {
1137		if ((fk = f.key) instanceof TreeBin) {
1138	<	TreeBin t = (TreeBin)fk;
1138	>	TreeBin<V> t = (TreeBin<V>)fk;
1139		boolean validated = false;
1140		boolean deleted = false;
1141		t.acquire(0);
1142		try {
1143		if (tabAt(tab, i) == f) {
1144		validated = true;
1145	<	TreeNode p = t.getTreeNode(h, k, t.root);
1145	>	TreeNode<V> p = t.getTreeNode(h, k, t.root);
1146		if (p != null) {
1147	<	Object pv = p.val;
1147	>	V pv = p.val;
1148		if (cv == null || cv == pv || cv.equals(pv)) {
1149		oldVal = pv;
1150		if ((p.val = v) == null) {
#	Line 1267 | Line 1159 | public class ConcurrentHashMap<K, V>
1159		}
1160		if (validated) {
1161		if (deleted)
1162	<	counter.add(-1L);
1162	>	addCount(-1L, -1);
1163		break;
1164		}
1165		}
1166		else
1167	<	tab = (Node[])fk;
1167	>	tab = (Node<V>[])fk;
1168		}
1169	<	else if ((fh & HASH_BITS) != h && f.next == null) // precheck
1169	>	else if (fh != h && f.next == null) // precheck
1170		break;                          // rules out possible existence
1171	<	else if ((fh & LOCKED) != 0) {
1280	<	checkForResize();               // try resizing if can't get lock
1281	<	f.tryAwaitLock(tab, i);
1282	<	}
1283	<	else if (f.casHash(fh, fh | LOCKED)) {
1171	>	else {
1172		boolean validated = false;
1173		boolean deleted = false;
1174	<	try {
1174	>	synchronized (f) {
1175		if (tabAt(tab, i) == f) {
1176		validated = true;
1177	<	for (Node e = f, pred = null;;) {
1178	<	Object ek, ev;
1179	<	if ((e.hash & HASH_BITS) == h &&
1177	>	for (Node<V> e = f, pred = null;;) {
1178	>	Object ek; V ev;
1179	>	if (e.hash == h &&
1180		((ev = e.val) != null) &&
1181		((ek = e.key) == k || k.equals(ek))) {
1182		if (cv == null || cv == ev || cv.equals(ev)) {
1183		oldVal = ev;
1184		if ((e.val = v) == null) {
1185		deleted = true;
1186	<	Node en = e.next;
1186	>	Node<V> en = e.next;
1187		if (pred != null)
1188		pred.next = en;
1189		else
#	Line 1309 | Line 1197 | public class ConcurrentHashMap<K, V>
1197		break;
1198		}
1199		}
1312	–	} finally {
1313	–	if (!f.casHash(fh | LOCKED, fh)) {
1314	–	f.hash = fh;
1315	–	synchronized (f) { f.notifyAll(); };
1316	–	}
1200		}
1201		if (validated) {
1202		if (deleted)
1203	<	counter.add(-1L);
1203	>	addCount(-1L, -1);
1204		break;
1205		}
1206		}
#	Line 1326 | Line 1209 | public class ConcurrentHashMap<K, V>
1209		}
1210
1211		/*
1212	<	* Internal versions of the six insertion methods, each a
1213	<	* little more complicated than the last. All have
1331	<	* the same basic structure as the first (internalPut):
1212	>	* Internal versions of insertion methods
1213	>	* All have the same basic structure as the first (internalPut):
1214		*  1. If table uninitialized, create
1215		*  2. If bin empty, try to CAS new node
1216		*  3. If bin stale, use new table
1217		*  4. if bin converted to TreeBin, validate and relay to TreeBin methods
1218		*  5. Lock and validate; if valid, scan and add or update
1219		*
1220	<	* The others interweave other checks and/or alternative actions:
1221	<	*  * Plain put checks for and performs resize after insertion.
1222	<	*  * putIfAbsent prescans for mapping without lock (and fails to add
1223	<	*    if present), which also makes pre-emptive resize checks worthwhile.
1224	<	*  * computeIfAbsent extends form used in putIfAbsent with additional
1225	<	*    mechanics to deal with, calls, potential exceptions and null
1226	<	*    returns from function call.
1345	<	*  * compute uses the same function-call mechanics, but without
1346	<	*    the prescans
1347	<	*  * merge acts as putIfAbsent in the absent case, but invokes the
1348	<	*    update function if present
1349	<	*  * putAll attempts to pre-allocate enough table space
1350	<	*    and more lazily performs count updates and checks.
1351	<	*
1352	<	* Someday when details settle down a bit more, it might be worth
1353	<	* some factoring to reduce sprawl.
1220	>	* The putAll method differs mainly in attempting to pre-allocate
1221	>	* enough table space, and also more lazily performs count updates
1222	>	* and checks.
1223	>	*
1224	>	* Most of the function-accepting methods can't be factored nicely
1225	>	* because they require different functional forms, so instead
1226	>	* sprawl out similar mechanics.
1227		*/
1228
1229	<	/** Implementation for put */
1230	<	private final Object internalPut(Object k, Object v) {
1229	>	/** Implementation for put and putIfAbsent */
1230	>	@SuppressWarnings("unchecked") private final V internalPut
1231	>	(K k, V v, boolean onlyIfAbsent) {
1232	>	if (k == null || v == null) throw new NullPointerException();
1233		int h = spread(k.hashCode());
1234	<	int count = 0;
1235	<	for (Node[] tab = table;;) {
1236	<	int i; Node f; int fh; Object fk;
1234	>	int len = 0;
1235	>	for (Node<V>[] tab = table;;) {
1236	>	int i, fh; Node<V> f; Object fk; V fv;
1237		if (tab == null)
1238		tab = initTable();
1239		else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) {
1240	<	if (casTabAt(tab, i, null, new Node(h, k, v, null)))
1240	>	if (casTabAt(tab, i, null, new Node<V>(h, k, v, null)))
1241		break;                   // no lock when adding to empty bin
1242		}
1243	<	else if ((fh = f.hash) == MOVED) {
1243	>	else if ((fh = f.hash) < 0) {
1244		if ((fk = f.key) instanceof TreeBin) {
1245	<	TreeBin t = (TreeBin)fk;
1246	<	Object oldVal = null;
1245	>	TreeBin<V> t = (TreeBin<V>)fk;
1246	>	V oldVal = null;
1247		t.acquire(0);
1248		try {
1249		if (tabAt(tab, i) == f) {
1250	<	count = 2;
1251	<	TreeNode p = t.putTreeNode(h, k, v);
1250	>	len = 2;
1251	>	TreeNode<V> p = t.putTreeNode(h, k, v);
1252		if (p != null) {
1253		oldVal = p.val;
1254	<	p.val = v;
1254	>	if (!onlyIfAbsent)
1255	>	p.val = v;
1256		}
1257		}
1258		} finally {
1259		t.release(0);
1260		}
1261	<	if (count != 0) {
1261	>	if (len != 0) {
1262		if (oldVal != null)
1263		return oldVal;
1264		break;
1265		}
1266		}
1267		else
1268	<	tab = (Node[])fk;
1268	>	tab = (Node<V>[])fk;
1269		}
1270	<	else if ((fh & LOCKED) != 0) {
1271	<	checkForResize();
1272	<	f.tryAwaitLock(tab, i);
1273	<	}
1274	<	else if (f.casHash(fh, fh | LOCKED)) {
1275	<	Object oldVal = null;
1400	<	try {                        // needed in case equals() throws
1270	>	else if (onlyIfAbsent && fh == h && (fv = f.val) != null &&
1271	>	((fk = f.key) == k || k.equals(fk))) // peek while nearby
1272	>	return fv;
1273	>	else {
1274	>	V oldVal = null;
1275	>	synchronized (f) {
1276		if (tabAt(tab, i) == f) {
1277	<	count = 1;
1278	<	for (Node e = f;; ++count) {
1279	<	Object ek, ev;
1280	<	if ((e.hash & HASH_BITS) == h &&
1277	>	len = 1;
1278	>	for (Node<V> e = f;; ++len) {
1279	>	Object ek; V ev;
1280	>	if (e.hash == h &&
1281		(ev = e.val) != null &&
1282		((ek = e.key) == k || k.equals(ek))) {
1283		oldVal = ev;
1284	<	e.val = v;
1284	>	if (!onlyIfAbsent)
1285	>	e.val = v;
1286		break;
1287		}
1288	<	Node last = e;
1288	>	Node<V> last = e;
1289		if ((e = e.next) == null) {
1290	<	last.next = new Node(h, k, v, null);
1291	<	if (count >= TREE_THRESHOLD)
1290	>	last.next = new Node<V>(h, k, v, null);
1291	>	if (len >= TREE_THRESHOLD)
1292		replaceWithTreeBin(tab, i, k);
1293		break;
1294		}
1295		}
1296		}
1421	–	} finally {                  // unlock and signal if needed
1422	–	if (!f.casHash(fh | LOCKED, fh)) {
1423	–	f.hash = fh;
1424	–	synchronized (f) { f.notifyAll(); };
1425	–	}
1297		}
1298	<	if (count != 0) {
1298	>	if (len != 0) {
1299		if (oldVal != null)
1300		return oldVal;
1430	–	if (tab.length <= 64)
1431	–	count = 2;
1301		break;
1302		}
1303		}
1304		}
1305	<	counter.add(1L);
1437	<	if (count > 1)
1438	<	checkForResize();
1439	<	return null;
1440	<	}
1441	<
1442	<	/** Implementation for putIfAbsent */
1443	<	private final Object internalPutIfAbsent(Object k, Object v) {
1444	<	int h = spread(k.hashCode());
1445	<	int count = 0;
1446	<	for (Node[] tab = table;;) {
1447	<	int i; Node f; int fh; Object fk, fv;
1448	<	if (tab == null)
1449	<	tab = initTable();
1450	<	else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) {
1451	<	if (casTabAt(tab, i, null, new Node(h, k, v, null)))
1452	<	break;
1453	<	}
1454	<	else if ((fh = f.hash) == MOVED) {
1455	<	if ((fk = f.key) instanceof TreeBin) {
1456	<	TreeBin t = (TreeBin)fk;
1457	<	Object oldVal = null;
1458	<	t.acquire(0);
1459	<	try {
1460	<	if (tabAt(tab, i) == f) {
1461	<	count = 2;
1462	<	TreeNode p = t.putTreeNode(h, k, v);
1463	<	if (p != null)
1464	<	oldVal = p.val;
1465	<	}
1466	<	} finally {
1467	<	t.release(0);
1468	<	}
1469	<	if (count != 0) {
1470	<	if (oldVal != null)
1471	<	return oldVal;
1472	<	break;
1473	<	}
1474	<	}
1475	<	else
1476	<	tab = (Node[])fk;
1477	<	}
1478	<	else if ((fh & HASH_BITS) == h && (fv = f.val) != null &&
1479	<	((fk = f.key) == k || k.equals(fk)))
1480	<	return fv;
1481	<	else {
1482	<	Node g = f.next;
1483	<	if (g != null) { // at least 2 nodes -- search and maybe resize
1484	<	for (Node e = g;;) {
1485	<	Object ek, ev;
1486	<	if ((e.hash & HASH_BITS) == h && (ev = e.val) != null &&
1487	<	((ek = e.key) == k || k.equals(ek)))
1488	<	return ev;
1489	<	if ((e = e.next) == null) {
1490	<	checkForResize();
1491	<	break;
1492	<	}
1493	<	}
1494	<	}
1495	<	if (((fh = f.hash) & LOCKED) != 0) {
1496	<	checkForResize();
1497	<	f.tryAwaitLock(tab, i);
1498	<	}
1499	<	else if (tabAt(tab, i) == f && f.casHash(fh, fh | LOCKED)) {
1500	<	Object oldVal = null;
1501	<	try {
1502	<	if (tabAt(tab, i) == f) {
1503	<	count = 1;
1504	<	for (Node e = f;; ++count) {
1505	<	Object ek, ev;
1506	<	if ((e.hash & HASH_BITS) == h &&
1507	<	(ev = e.val) != null &&
1508	<	((ek = e.key) == k || k.equals(ek))) {
1509	<	oldVal = ev;
1510	<	break;
1511	<	}
1512	<	Node last = e;
1513	<	if ((e = e.next) == null) {
1514	<	last.next = new Node(h, k, v, null);
1515	<	if (count >= TREE_THRESHOLD)
1516	<	replaceWithTreeBin(tab, i, k);
1517	<	break;
1518	<	}
1519	<	}
1520	<	}
1521	<	} finally {
1522	<	if (!f.casHash(fh | LOCKED, fh)) {
1523	<	f.hash = fh;
1524	<	synchronized (f) { f.notifyAll(); };
1525	<	}
1526	<	}
1527	<	if (count != 0) {
1528	<	if (oldVal != null)
1529	<	return oldVal;
1530	<	if (tab.length <= 64)
1531	<	count = 2;
1532	<	break;
1533	<	}
1534	<	}
1535	<	}
1536	<	}
1537	<	counter.add(1L);
1538	<	if (count > 1)
1539	<	checkForResize();
1305	>	addCount(1L, len);
1306		return null;
1307		}
1308
1309		/** Implementation for computeIfAbsent */
1310	<	private final Object internalComputeIfAbsent(K k,
1311	<	Fun<? super K, ?> mf) {
1310	>	@SuppressWarnings("unchecked") private final V internalComputeIfAbsent
1311	>	(K k, Function<? super K, ? extends V> mf) {
1312	>	if (k == null || mf == null)
1313	>	throw new NullPointerException();
1314		int h = spread(k.hashCode());
1315	<	Object val = null;
1316	<	int count = 0;
1317	<	for (Node[] tab = table;;) {
1318	<	Node f; int i, fh; Object fk, fv;
1315	>	V val = null;
1316	>	int len = 0;
1317	>	for (Node<V>[] tab = table;;) {
1318	>	Node<V> f; int i; Object fk;
1319		if (tab == null)
1320		tab = initTable();
1321		else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) {
1322	<	Node node = new Node(fh = h | LOCKED, k, null, null);
1323	<	if (casTabAt(tab, i, null, node)) {
1324	<	count = 1;
1325	<	try {
1326	<	if ((val = mf.apply(k)) != null)
1327	<	node.val = val;
1328	<	} finally {
1329	<	if (val == null)
1330	<	setTabAt(tab, i, null);
1331	<	if (!node.casHash(fh, h)) {
1564	<	node.hash = h;
1565	<	synchronized (node) { node.notifyAll(); };
1322	>	Node<V> node = new Node<V>(h, k, null, null);
1323	>	synchronized (node) {
1324	>	if (casTabAt(tab, i, null, node)) {
1325	>	len = 1;
1326	>	try {
1327	>	if ((val = mf.apply(k)) != null)
1328	>	node.val = val;
1329	>	} finally {
1330	>	if (val == null)
1331	>	setTabAt(tab, i, null);
1332		}
1333		}
1334		}
1335	<	if (count != 0)
1335	>	if (len != 0)
1336		break;
1337		}
1338	<	else if ((fh = f.hash) == MOVED) {
1338	>	else if (f.hash < 0) {
1339		if ((fk = f.key) instanceof TreeBin) {
1340	<	TreeBin t = (TreeBin)fk;
1340	>	TreeBin<V> t = (TreeBin<V>)fk;
1341		boolean added = false;
1342		t.acquire(0);
1343		try {
1344		if (tabAt(tab, i) == f) {
1345	<	count = 1;
1346	<	TreeNode p = t.getTreeNode(h, k, t.root);
1345	>	len = 1;
1346	>	TreeNode<V> p = t.getTreeNode(h, k, t.root);
1347		if (p != null)
1348		val = p.val;
1349		else if ((val = mf.apply(k)) != null) {
1350		added = true;
1351	<	count = 2;
1351	>	len = 2;
1352		t.putTreeNode(h, k, val);
1353		}
1354		}
1355		} finally {
1356		t.release(0);
1357		}
1358	<	if (count != 0) {
1358	>	if (len != 0) {
1359		if (!added)
1360		return val;
1361		break;
1362		}
1363		}
1364		else
1365	<	tab = (Node[])fk;
1365	>	tab = (Node<V>[])fk;
1366		}
1601	–	else if ((fh & HASH_BITS) == h && (fv = f.val) != null &&
1602	–	((fk = f.key) == k || k.equals(fk)))
1603	–	return fv;
1367		else {
1368	<	Node g = f.next;
1369	<	if (g != null) {
1370	<	for (Node e = g;;) {
1371	<	Object ek, ev;
1372	<	if ((e.hash & HASH_BITS) == h && (ev = e.val) != null &&
1610	<	((ek = e.key) == k || k.equals(ek)))
1611	<	return ev;
1612	<	if ((e = e.next) == null) {
1613	<	checkForResize();
1614	<	break;
1615	<	}
1616	<	}
1617	<	}
1618	<	if (((fh = f.hash) & LOCKED) != 0) {
1619	<	checkForResize();
1620	<	f.tryAwaitLock(tab, i);
1368	>	for (Node<V> e = f; e != null; e = e.next) { // prescan
1369	>	Object ek; V ev;
1370	>	if (e.hash == h && (ev = e.val) != null &&
1371	>	((ek = e.key) == k || k.equals(ek)))
1372	>	return ev;
1373		}
1374	<	else if (tabAt(tab, i) == f && f.casHash(fh, fh | LOCKED)) {
1375	<	boolean added = false;
1376	<	try {
1377	<	if (tabAt(tab, i) == f) {
1378	<	count = 1;
1379	<	for (Node e = f;; ++count) {
1380	<	Object ek, ev;
1381	<	if ((e.hash & HASH_BITS) == h &&
1382	<	(ev = e.val) != null &&
1383	<	((ek = e.key) == k || k.equals(ek))) {
1384	<	val = ev;
1385	<	break;
1386	<	}
1387	<	Node last = e;
1388	<	if ((e = e.next) == null) {
1389	<	if ((val = mf.apply(k)) != null) {
1390	<	added = true;
1391	<	last.next = new Node(h, k, val, null);
1392	<	if (count >= TREE_THRESHOLD)
1641	<	replaceWithTreeBin(tab, i, k);
1642	<	}
1643	<	break;
1374	>	boolean added = false;
1375	>	synchronized (f) {
1376	>	if (tabAt(tab, i) == f) {
1377	>	len = 1;
1378	>	for (Node<V> e = f;; ++len) {
1379	>	Object ek; V ev;
1380	>	if (e.hash == h &&
1381	>	(ev = e.val) != null &&
1382	>	((ek = e.key) == k || k.equals(ek))) {
1383	>	val = ev;
1384	>	break;
1385	>	}
1386	>	Node<V> last = e;
1387	>	if ((e = e.next) == null) {
1388	>	if ((val = mf.apply(k)) != null) {
1389	>	added = true;
1390	>	last.next = new Node<V>(h, k, val, null);
1391	>	if (len >= TREE_THRESHOLD)
1392	>	replaceWithTreeBin(tab, i, k);
1393		}
1394	+	break;
1395		}
1396		}
1647	–	} finally {
1648	–	if (!f.casHash(fh | LOCKED, fh)) {
1649	–	f.hash = fh;
1650	–	synchronized (f) { f.notifyAll(); };
1651	–	}
1652	–	}
1653	–	if (count != 0) {
1654	–	if (!added)
1655	–	return val;
1656	–	if (tab.length <= 64)
1657	–	count = 2;
1658	–	break;
1397		}
1398		}
1399	+	if (len != 0) {
1400	+	if (!added)
1401	+	return val;
1402	+	break;
1403	+	}
1404		}
1405		}
1406	<	if (val != null) {
1407	<	counter.add(1L);
1665	<	if (count > 1)
1666	<	checkForResize();
1667	<	}
1406	>	if (val != null)
1407	>	addCount(1L, len);
1408		return val;
1409		}
1410
1411		/** Implementation for compute */
1412	<	@SuppressWarnings("unchecked") private final Object internalCompute
1413	<	(K k, boolean onlyIfPresent, BiFun<? super K, ? super V, ? extends V> mf) {
1412	>	@SuppressWarnings("unchecked") private final V internalCompute
1413	>	(K k, boolean onlyIfPresent,
1414	>	BiFunction<? super K, ? super V, ? extends V> mf) {
1415	>	if (k == null || mf == null)
1416	>	throw new NullPointerException();
1417		int h = spread(k.hashCode());
1418	<	Object val = null;
1418	>	V val = null;
1419		int delta = 0;
1420	<	int count = 0;
1421	<	for (Node[] tab = table;;) {
1422	<	Node f; int i, fh; Object fk;
1420	>	int len = 0;
1421	>	for (Node<V>[] tab = table;;) {
1422	>	Node<V> f; int i, fh; Object fk;
1423		if (tab == null)
1424		tab = initTable();
1425		else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) {
1426		if (onlyIfPresent)
1427		break;
1428	<	Node node = new Node(fh = h | LOCKED, k, null, null);
1429	<	if (casTabAt(tab, i, null, node)) {
1430	<	try {
1431	<	count = 1;
1432	<	if ((val = mf.apply(k, null)) != null) {
1433	<	node.val = val;
1434	<	delta = 1;
1435	<	}
1436	<	} finally {
1437	<	if (delta == 0)
1438	<	setTabAt(tab, i, null);
1439	<	if (!node.casHash(fh, h)) {
1697	<	node.hash = h;
1698	<	synchronized (node) { node.notifyAll(); };
1428	>	Node<V> node = new Node<V>(h, k, null, null);
1429	>	synchronized (node) {
1430	>	if (casTabAt(tab, i, null, node)) {
1431	>	try {
1432	>	len = 1;
1433	>	if ((val = mf.apply(k, null)) != null) {
1434	>	node.val = val;
1435	>	delta = 1;
1436	>	}
1437	>	} finally {
1438	>	if (delta == 0)
1439	>	setTabAt(tab, i, null);
1440		}
1441		}
1442		}
1443	<	if (count != 0)
1443	>	if (len != 0)
1444		break;
1445		}
1446	<	else if ((fh = f.hash) == MOVED) {
1446	>	else if ((fh = f.hash) < 0) {
1447		if ((fk = f.key) instanceof TreeBin) {
1448	<	TreeBin t = (TreeBin)fk;
1448	>	TreeBin<V> t = (TreeBin<V>)fk;
1449		t.acquire(0);
1450		try {
1451		if (tabAt(tab, i) == f) {
1452	<	count = 1;
1453	<	TreeNode p = t.getTreeNode(h, k, t.root);
1454	<	Object pv = (p == null) ? null : p.val;
1455	<	if ((val = mf.apply(k, (V)pv)) != null) {
1452	>	len = 1;
1453	>	TreeNode<V> p = t.getTreeNode(h, k, t.root);
1454	>	if (p == null && onlyIfPresent)
1455	>	break;
1456	>	V pv = (p == null) ? null : p.val;
1457	>	if ((val = mf.apply(k, pv)) != null) {
1458		if (p != null)
1459		p.val = val;
1460		else {
1461	<	count = 2;
1461	>	len = 2;
1462		delta = 1;
1463		t.putTreeNode(h, k, val);
1464		}
#	Line 1728 | Line 1471 | public class ConcurrentHashMap<K, V>
1471		} finally {
1472		t.release(0);
1473		}
1474	<	if (count != 0)
1474	>	if (len != 0)
1475		break;
1476		}
1477		else
1478	<	tab = (Node[])fk;
1736	<	}
1737	<	else if ((fh & LOCKED) != 0) {
1738	<	checkForResize();
1739	<	f.tryAwaitLock(tab, i);
1478	>	tab = (Node<V>[])fk;
1479		}
1480	<	else if (f.casHash(fh, fh | LOCKED)) {
1481	<	try {
1480	>	else {
1481	>	synchronized (f) {
1482		if (tabAt(tab, i) == f) {
1483	<	count = 1;
1484	<	for (Node e = f, pred = null;; ++count) {
1485	<	Object ek, ev;
1486	<	if ((e.hash & HASH_BITS) == h &&
1483	>	len = 1;
1484	>	for (Node<V> e = f, pred = null;; ++len) {
1485	>	Object ek; V ev;
1486	>	if (e.hash == h &&
1487		(ev = e.val) != null &&
1488		((ek = e.key) == k || k.equals(ek))) {
1489	<	val = mf.apply(k, (V)ev);
1489	>	val = mf.apply(k, ev);
1490		if (val != null)
1491		e.val = val;
1492		else {
1493		delta = -1;
1494	<	Node en = e.next;
1494	>	Node<V> en = e.next;
1495		if (pred != null)
1496		pred.next = en;
1497		else
#	Line 1762 | Line 1501 | public class ConcurrentHashMap<K, V>
1501		}
1502		pred = e;
1503		if ((e = e.next) == null) {
1504	<	if (!onlyIfPresent && (val = mf.apply(k, null)) != null) {
1505	<	pred.next = new Node(h, k, val, null);
1504	>	if (!onlyIfPresent &&
1505	>	(val = mf.apply(k, null)) != null) {
1506	>	pred.next = new Node<V>(h, k, val, null);
1507		delta = 1;
1508	<	if (count >= TREE_THRESHOLD)
1508	>	if (len >= TREE_THRESHOLD)
1509		replaceWithTreeBin(tab, i, k);
1510		}
1511		break;
1512		}
1513		}
1514		}
1775	–	} finally {
1776	–	if (!f.casHash(fh | LOCKED, fh)) {
1777	–	f.hash = fh;
1778	–	synchronized (f) { f.notifyAll(); };
1779	–	}
1515		}
1516	<	if (count != 0) {
1782	<	if (tab.length <= 64)
1783	<	count = 2;
1516	>	if (len != 0)
1517		break;
1785	–	}
1518		}
1519		}
1520	<	if (delta != 0) {
1521	<	counter.add((long)delta);
1790	<	if (count > 1)
1791	<	checkForResize();
1792	<	}
1520	>	if (delta != 0)
1521	>	addCount((long)delta, len);
1522		return val;
1523		}
1524
1525		/** Implementation for merge */
1526	<	@SuppressWarnings("unchecked") private final Object internalMerge
1527	<	(K k, V v, BiFun<? super V, ? super V, ? extends V> mf) {
1526	>	@SuppressWarnings("unchecked") private final V internalMerge
1527	>	(K k, V v, BiFunction<? super V, ? super V, ? extends V> mf) {
1528	>	if (k == null || v == null || mf == null)
1529	>	throw new NullPointerException();
1530		int h = spread(k.hashCode());
1531	<	Object val = null;
1531	>	V val = null;
1532		int delta = 0;
1533	<	int count = 0;
1534	<	for (Node[] tab = table;;) {
1535	<	int i; Node f; int fh; Object fk, fv;
1533	>	int len = 0;
1534	>	for (Node<V>[] tab = table;;) {
1535	>	int i; Node<V> f; Object fk; V fv;
1536		if (tab == null)
1537		tab = initTable();
1538		else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) {
1539	<	if (casTabAt(tab, i, null, new Node(h, k, v, null))) {
1539	>	if (casTabAt(tab, i, null, new Node<V>(h, k, v, null))) {
1540		delta = 1;
1541		val = v;
1542		break;
1543		}
1544		}
1545	<	else if ((fh = f.hash) == MOVED) {
1545	>	else if (f.hash < 0) {
1546		if ((fk = f.key) instanceof TreeBin) {
1547	<	TreeBin t = (TreeBin)fk;
1547	>	TreeBin<V> t = (TreeBin<V>)fk;
1548		t.acquire(0);
1549		try {
1550		if (tabAt(tab, i) == f) {
1551	<	count = 1;
1552	<	TreeNode p = t.getTreeNode(h, k, t.root);
1553	<	val = (p == null) ? v : mf.apply((V)p.val, v);
1551	>	len = 1;
1552	>	TreeNode<V> p = t.getTreeNode(h, k, t.root);
1553	>	val = (p == null) ? v : mf.apply(p.val, v);
1554		if (val != null) {
1555		if (p != null)
1556		p.val = val;
1557		else {
1558	<	count = 2;
1558	>	len = 2;
1559		delta = 1;
1560		t.putTreeNode(h, k, val);
1561		}
#	Line 1837 | Line 1568 | public class ConcurrentHashMap<K, V>
1568		} finally {
1569		t.release(0);
1570		}
1571	<	if (count != 0)
1571	>	if (len != 0)
1572		break;
1573		}
1574		else
1575	<	tab = (Node[])fk;
1845	<	}
1846	<	else if ((fh & LOCKED) != 0) {
1847	<	checkForResize();
1848	<	f.tryAwaitLock(tab, i);
1575	>	tab = (Node<V>[])fk;
1576		}
1577	<	else if (f.casHash(fh, fh | LOCKED)) {
1578	<	try {
1577	>	else {
1578	>	synchronized (f) {
1579		if (tabAt(tab, i) == f) {
1580	<	count = 1;
1581	<	for (Node e = f, pred = null;; ++count) {
1582	<	Object ek, ev;
1583	<	if ((e.hash & HASH_BITS) == h &&
1580	>	len = 1;
1581	>	for (Node<V> e = f, pred = null;; ++len) {
1582	>	Object ek; V ev;
1583	>	if (e.hash == h &&
1584		(ev = e.val) != null &&
1585		((ek = e.key) == k || k.equals(ek))) {
1586	<	val = mf.apply(v, (V)ev);
1586	>	val = mf.apply(ev, v);
1587		if (val != null)
1588		e.val = val;
1589		else {
1590		delta = -1;
1591	<	Node en = e.next;
1591	>	Node<V> en = e.next;
1592		if (pred != null)
1593		pred.next = en;
1594		else
#	Line 1872 | Line 1599 | public class ConcurrentHashMap<K, V>
1599		pred = e;
1600		if ((e = e.next) == null) {
1601		val = v;
1602	<	pred.next = new Node(h, k, val, null);
1602	>	pred.next = new Node<V>(h, k, val, null);
1603		delta = 1;
1604	<	if (count >= TREE_THRESHOLD)
1604	>	if (len >= TREE_THRESHOLD)
1605		replaceWithTreeBin(tab, i, k);
1606		break;
1607		}
1608		}
1609		}
1883	–	} finally {
1884	–	if (!f.casHash(fh | LOCKED, fh)) {
1885	–	f.hash = fh;
1886	–	synchronized (f) { f.notifyAll(); };
1887	–	}
1610		}
1611	<	if (count != 0) {
1890	<	if (tab.length <= 64)
1891	<	count = 2;
1611	>	if (len != 0)
1612		break;
1893	–	}
1613		}
1614		}
1615	<	if (delta != 0) {
1616	<	counter.add((long)delta);
1898	<	if (count > 1)
1899	<	checkForResize();
1900	<	}
1615	>	if (delta != 0)
1616	>	addCount((long)delta, len);
1617		return val;
1618		}
1619
1620		/** Implementation for putAll */
1621	<	private final void internalPutAll(Map<?, ?> m) {
1621	>	@SuppressWarnings("unchecked") private final void internalPutAll
1622	>	(Map<? extends K, ? extends V> m) {
1623		tryPresize(m.size());
1624		long delta = 0L;     // number of uncommitted additions
1625		boolean npe = false; // to throw exception on exit for nulls
1626		try {                // to clean up counts on other exceptions
1627	<	for (Map.Entry<?, ?> entry : m.entrySet()) {
1628	<	Object k, v;
1627	>	for (Map.Entry<?, ? extends V> entry : m.entrySet()) {
1628	>	Object k; V v;
1629		if (entry == null || (k = entry.getKey()) == null ||
1630		(v = entry.getValue()) == null) {
1631		npe = true;
1632		break;
1633		}
1634		int h = spread(k.hashCode());
1635	<	for (Node[] tab = table;;) {
1636	<	int i; Node f; int fh; Object fk;
1635	>	for (Node<V>[] tab = table;;) {
1636	>	int i; Node<V> f; int fh; Object fk;
1637		if (tab == null)
1638		tab = initTable();
1639		else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null){
1640	<	if (casTabAt(tab, i, null, new Node(h, k, v, null))) {
1640	>	if (casTabAt(tab, i, null, new Node<V>(h, k, v, null))) {
1641		++delta;
1642		break;
1643		}
1644		}
1645	<	else if ((fh = f.hash) == MOVED) {
1645	>	else if ((fh = f.hash) < 0) {
1646		if ((fk = f.key) instanceof TreeBin) {
1647	<	TreeBin t = (TreeBin)fk;
1647	>	TreeBin<V> t = (TreeBin<V>)fk;
1648		boolean validated = false;
1649		t.acquire(0);
1650		try {
1651		if (tabAt(tab, i) == f) {
1652		validated = true;
1653	<	TreeNode p = t.getTreeNode(h, k, t.root);
1653	>	TreeNode<V> p = t.getTreeNode(h, k, t.root);
1654		if (p != null)
1655		p.val = v;
1656		else {
#	Line 1948 | Line 1665 | public class ConcurrentHashMap<K, V>
1665		break;
1666		}
1667		else
1668	<	tab = (Node[])fk;
1952	<	}
1953	<	else if ((fh & LOCKED) != 0) {
1954	<	counter.add(delta);
1955	<	delta = 0L;
1956	<	checkForResize();
1957	<	f.tryAwaitLock(tab, i);
1668	>	tab = (Node<V>[])fk;
1669		}
1670	<	else if (f.casHash(fh, fh | LOCKED)) {
1671	<	int count = 0;
1672	<	try {
1670	>	else {
1671	>	int len = 0;
1672	>	synchronized (f) {
1673		if (tabAt(tab, i) == f) {
1674	<	count = 1;
1675	<	for (Node e = f;; ++count) {
1676	<	Object ek, ev;
1677	<	if ((e.hash & HASH_BITS) == h &&
1674	>	len = 1;
1675	>	for (Node<V> e = f;; ++len) {
1676	>	Object ek; V ev;
1677	>	if (e.hash == h &&
1678		(ev = e.val) != null &&
1679		((ek = e.key) == k || k.equals(ek))) {
1680		e.val = v;
1681		break;
1682		}
1683	<	Node last = e;
1683	>	Node<V> last = e;
1684		if ((e = e.next) == null) {
1685		++delta;
1686	<	last.next = new Node(h, k, v, null);
1687	<	if (count >= TREE_THRESHOLD)
1686	>	last.next = new Node<V>(h, k, v, null);
1687	>	if (len >= TREE_THRESHOLD)
1688		replaceWithTreeBin(tab, i, k);
1689		break;
1690		}
1691		}
1692		}
1982	–	} finally {
1983	–	if (!f.casHash(fh | LOCKED, fh)) {
1984	–	f.hash = fh;
1985	–	synchronized (f) { f.notifyAll(); };
1986	–	}
1693		}
1694	<	if (count != 0) {
1695	<	if (count > 1) {
1696	<	counter.add(delta);
1694	>	if (len != 0) {
1695	>	if (len > 1) {
1696	>	addCount(delta, len);
1697		delta = 0L;
1992	–	checkForResize();
1698		}
1699		break;
1700		}
#	Line 1997 | Line 1702 | public class ConcurrentHashMap<K, V>
1702		}
1703		}
1704		} finally {
1705	<	if (delta != 0)
1706	<	counter.add(delta);
1705	>	if (delta != 0L)
1706	>	addCount(delta, 2);
1707		}
1708		if (npe)
1709		throw new NullPointerException();
1710		}
1711
1712	+	/**
1713	+	* Implementation for clear. Steps through each bin, removing all
1714	+	* nodes.
1715	+	*/
1716	+	@SuppressWarnings("unchecked") private final void internalClear() {
1717	+	long delta = 0L; // negative number of deletions
1718	+	int i = 0;
1719	+	Node<V>[] tab = table;
1720	+	while (tab != null && i < tab.length) {
1721	+	Node<V> f = tabAt(tab, i);
1722	+	if (f == null)
1723	+	++i;
1724	+	else if (f.hash < 0) {
1725	+	Object fk;
1726	+	if ((fk = f.key) instanceof TreeBin) {
1727	+	TreeBin<V> t = (TreeBin<V>)fk;
1728	+	t.acquire(0);
1729	+	try {
1730	+	if (tabAt(tab, i) == f) {
1731	+	for (Node<V> p = t.first; p != null; p = p.next) {
1732	+	if (p.val != null) { // (currently always true)
1733	+	p.val = null;
1734	+	--delta;
1735	+	}
1736	+	}
1737	+	t.first = null;
1738	+	t.root = null;
1739	+	++i;
1740	+	}
1741	+	} finally {
1742	+	t.release(0);
1743	+	}
1744	+	}
1745	+	else
1746	+	tab = (Node<V>[])fk;
1747	+	}
1748	+	else {
1749	+	synchronized (f) {
1750	+	if (tabAt(tab, i) == f) {
1751	+	for (Node<V> e = f; e != null; e = e.next) {
1752	+	if (e.val != null) {  // (currently always true)
1753	+	e.val = null;
1754	+	--delta;
1755	+	}
1756	+	}
1757	+	setTabAt(tab, i, null);
1758	+	++i;
1759	+	}
1760	+	}
1761	+	}
1762	+	}
1763	+	if (delta != 0L)
1764	+	addCount(delta, -1);
1765	+	}
1766	+
1767		/* ---------------- Table Initialization and Resizing -------------- */
1768
1769		/**
#	Line 2023 | Line 1783 | public class ConcurrentHashMap<K, V>
1783		/**
1784		* Initializes table, using the size recorded in sizeCtl.
1785		*/
1786	<	private final Node[] initTable() {
1787	<	Node[] tab; int sc;
1786	>	@SuppressWarnings("unchecked") private final Node<V>[] initTable() {
1787	>	Node<V>[] tab; int sc;
1788		while ((tab = table) == null) {
1789		if ((sc = sizeCtl) < 0)
1790		Thread.yield(); // lost initialization race; just spin
1791	<	else if (UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) {
1791	>	else if (U.compareAndSwapInt(this, SIZECTL, sc, -1)) {
1792		try {
1793		if ((tab = table) == null) {
1794		int n = (sc > 0) ? sc : DEFAULT_CAPACITY;
1795	<	tab = table = new Node[n];
1795	>	@SuppressWarnings("rawtypes") Node[] tb = new Node[n];
1796	>	table = tab = (Node<V>[])tb;
1797		sc = n - (n >>> 2);
1798		}
1799		} finally {
#	Line 2045 | Line 1806 | public class ConcurrentHashMap<K, V>
1806		}
1807
1808		/**
1809	<	* If table is too small and not already resizing, creates next
1810	<	* table and transfers bins.  Rechecks occupancy after a transfer
1811	<	* to see if another resize is already needed because resizings
1812	<	* are lagging additions.
1813	<	*/
1814	<	private final void checkForResize() {
1815	<	Node[] tab; int n, sc;
1816	<	while ((tab = table) != null &&
1817	<	(n = tab.length) < MAXIMUM_CAPACITY &&
1818	<	(sc = sizeCtl) >= 0 && counter.sum() >= (long)sc &&
1819	<	UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) {
1820	<	try {
1821	<	if (tab == table) {
1822	<	table = rebuild(tab);
1823	<	sc = (n << 1) - (n >>> 1);
1809	>	* Adds to count, and if table is too small and not already
1810	>	* resizing, initiates transfer. If already resizing, helps
1811	>	* perform transfer if work is available.  Rechecks occupancy
1812	>	* after a transfer to see if another resize is already needed
1813	>	* because resizings are lagging additions.
1814	>	*
1815	>	* @param x the count to add
1816	>	* @param check if <0, don't check resize, if <= 1 only check if uncontended
1817	>	*/
1818	>	private final void addCount(long x, int check) {
1819	>	Cell[] as; long b, s;
1820	>	if ((as = counterCells) != null ||
1821	>	!U.compareAndSwapLong(this, BASECOUNT, b = baseCount, s = b + x)) {
1822	>	Cell a; long v; int m;
1823	>	boolean uncontended = true;
1824	>	if (as == null || (m = as.length - 1) < 0 ||
1825	>	(a = as[ThreadLocalRandom.getProbe() & m]) == null ||
1826	>	!(uncontended =
1827	>	U.compareAndSwapLong(a, CELLVALUE, v = a.value, v + x))) {
1828	>	fullAddCount(x, uncontended);
1829	>	return;
1830	>	}
1831	>	if (check <= 1)
1832	>	return;
1833	>	s = sumCount();
1834	>	}
1835	>	if (check >= 0) {
1836	>	Node<V>[] tab, nt; int sc;
1837	>	while (s >= (long)(sc = sizeCtl) && (tab = table) != null &&
1838	>	tab.length < MAXIMUM_CAPACITY) {
1839	>	if (sc < 0) {
1840	>	if (sc == -1 || transferIndex <= transferOrigin ||
1841	>	(nt = nextTable) == null)
1842	>	break;
1843	>	if (U.compareAndSwapInt(this, SIZECTL, sc, sc - 1))
1844	>	transfer(tab, nt);
1845		}
1846	<	} finally {
1847	<	sizeCtl = sc;
1846	>	else if (U.compareAndSwapInt(this, SIZECTL, sc, -2))
1847	>	transfer(tab, null);
1848	>	s = sumCount();
1849		}
1850		}
1851		}
#	Line 2072 | Line 1855 | public class ConcurrentHashMap<K, V>
1855		*
1856		* @param size number of elements (doesn't need to be perfectly accurate)
1857		*/
1858	<	private final void tryPresize(int size) {
1858	>	@SuppressWarnings("unchecked") private final void tryPresize(int size) {
1859		int c = (size >= (MAXIMUM_CAPACITY >>> 1)) ? MAXIMUM_CAPACITY :
1860		tableSizeFor(size + (size >>> 1) + 1);
1861		int sc;
1862		while ((sc = sizeCtl) >= 0) {
1863	<	Node[] tab = table; int n;
1863	>	Node<V>[] tab = table; int n;
1864		if (tab == null || (n = tab.length) == 0) {
1865		n = (sc > c) ? sc : c;
1866	<	if (UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) {
1866	>	if (U.compareAndSwapInt(this, SIZECTL, sc, -1)) {
1867		try {
1868		if (table == tab) {
1869	<	table = new Node[n];
1869	>	@SuppressWarnings("rawtypes") Node[] tb = new Node[n];
1870	>	table = (Node<V>[])tb;
1871		sc = n - (n >>> 2);
1872		}
1873		} finally {
#	Line 2093 | Line 1877 | public class ConcurrentHashMap<K, V>
1877		}
1878		else if (c <= sc || n >= MAXIMUM_CAPACITY)
1879		break;
1880	<	else if (UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) {
1881	<	try {
1882	<	if (table == tab) {
2099	<	table = rebuild(tab);
2100	<	sc = (n << 1) - (n >>> 1);
2101	<	}
2102	<	} finally {
2103	<	sizeCtl = sc;
2104	<	}
2105	<	}
1880	>	else if (tab == table &&
1881	>	U.compareAndSwapInt(this, SIZECTL, sc, -2))
1882	>	transfer(tab, null);
1883		}
1884		}
1885
1886	<	/*
1886	>	/**
1887		* Moves and/or copies the nodes in each bin to new table. See
1888		* above for explanation.
2112	–	*
2113	–	* @return the new table
1889		*/
1890	<	private static final Node[] rebuild(Node[] tab) {
1891	<	int n = tab.length;
1892	<	Node[] nextTab = new Node[n << 1];
1893	<	Node fwd = new Node(MOVED, nextTab, null, null);
1894	<	int[] buffer = null;       // holds bins to revisit; null until needed
1895	<	Node rev = null;           // reverse forwarder; null until needed
1896	<	int nbuffered = 0;         // the number of bins in buffer list
1897	<	int bufferIndex = 0;       // buffer index of current buffered bin
1898	<	int bin = n - 1;           // current non-buffered bin or -1 if none
1899	<
1900	<	for (int i = bin;;) {      // start upwards sweep
1901	<	int fh; Node f;
1902	<	if ((f = tabAt(tab, i)) == null) {
1903	<	if (bin >= 0) {    // Unbuffered; no lock needed (or available)
1904	<	if (!casTabAt(tab, i, f, fwd))
1905	<	continue;
1906	<	}
1907	<	else {             // transiently use a locked forwarding node
1908	<	Node g = new Node(MOVED|LOCKED, nextTab, null, null);
1909	<	if (!casTabAt(tab, i, f, g))
1910	<	continue;
1890	>	@SuppressWarnings("unchecked") private final void transfer
1891	>	(Node<V>[] tab, Node<V>[] nextTab) {
1892	>	int n = tab.length, stride;
1893	>	if ((stride = (NCPU > 1) ? (n >>> 3) / NCPU : n) < MIN_TRANSFER_STRIDE)
1894	>	stride = MIN_TRANSFER_STRIDE; // subdivide range
1895	>	if (nextTab == null) {            // initiating
1896	>	try {
1897	>	@SuppressWarnings("rawtypes") Node[] tb = new Node[n << 1];
1898	>	nextTab = (Node<V>[])tb;
1899	>	} catch (Throwable ex) {      // try to cope with OOME
1900	>	sizeCtl = Integer.MAX_VALUE;
1901	>	return;
1902	>	}
1903	>	nextTable = nextTab;
1904	>	transferOrigin = n;
1905	>	transferIndex = n;
1906	>	Node<V> rev = new Node<V>(MOVED, tab, null, null);
1907	>	for (int k = n; k > 0;) {    // progressively reveal ready slots
1908	>	int nextk = (k > stride) ? k - stride : 0;
1909	>	for (int m = nextk; m < k; ++m)
1910	>	nextTab[m] = rev;
1911	>	for (int m = n + nextk; m < n + k; ++m)
1912	>	nextTab[m] = rev;
1913	>	U.putOrderedInt(this, TRANSFERORIGIN, k = nextk);
1914	>	}
1915	>	}
1916	>	int nextn = nextTab.length;
1917	>	Node<V> fwd = new Node<V>(MOVED, nextTab, null, null);
1918	>	boolean advance = true;
1919	>	for (int i = 0, bound = 0;;) {
1920	>	int nextIndex, nextBound; Node<V> f; Object fk;
1921	>	while (advance) {
1922	>	if (--i >= bound)
1923	>	advance = false;
1924	>	else if ((nextIndex = transferIndex) <= transferOrigin) {
1925	>	i = -1;
1926	>	advance = false;
1927	>	}
1928	>	else if (U.compareAndSwapInt
1929	>	(this, TRANSFERINDEX, nextIndex,
1930	>	nextBound = (nextIndex > stride ?
1931	>	nextIndex - stride : 0))) {
1932	>	bound = nextBound;
1933	>	i = nextIndex - 1;
1934	>	advance = false;
1935	>	}
1936	>	}
1937	>	if (i < 0 || i >= n || i + n >= nextn) {
1938	>	for (int sc;;) {
1939	>	if (U.compareAndSwapInt(this, SIZECTL, sc = sizeCtl, ++sc)) {
1940	>	if (sc == -1) {
1941	>	nextTable = null;
1942	>	table = nextTab;
1943	>	sizeCtl = (n << 1) - (n >>> 1);
1944	>	}
1945	>	return;
1946	>	}
1947	>	}
1948	>	}
1949	>	else if ((f = tabAt(tab, i)) == null) {
1950	>	if (casTabAt(tab, i, null, fwd)) {
1951		setTabAt(nextTab, i, null);
1952		setTabAt(nextTab, i + n, null);
1953	<	setTabAt(tab, i, fwd);
2139	<	if (!g.casHash(MOVED|LOCKED, MOVED)) {
2140	<	g.hash = MOVED;
2141	<	synchronized (g) { g.notifyAll(); }
2142	<	}
1953	>	advance = true;
1954		}
1955		}
1956	<	else if ((fh = f.hash) == MOVED) {
1957	<	Object fk = f.key;
1958	<	if (fk instanceof TreeBin) {
1959	<	TreeBin t = (TreeBin)fk;
1960	<	boolean validated = false;
1961	<	t.acquire(0);
1962	<	try {
1963	<	if (tabAt(tab, i) == f) {
1964	<	validated = true;
1965	<	splitTreeBin(nextTab, i, t);
1966	<	setTabAt(tab, i, fwd);
1956	>	else if (f.hash >= 0) {
1957	>	synchronized (f) {
1958	>	if (tabAt(tab, i) == f) {
1959	>	int runBit = f.hash & n;
1960	>	Node<V> lastRun = f, lo = null, hi = null;
1961	>	for (Node<V> p = f.next; p != null; p = p.next) {
1962	>	int b = p.hash & n;
1963	>	if (b != runBit) {
1964	>	runBit = b;
1965	>	lastRun = p;
1966	>	}
1967		}
1968	<	} finally {
1969	<	t.release(0);
1968	>	if (runBit == 0)
1969	>	lo = lastRun;
1970	>	else
1971	>	hi = lastRun;
1972	>	for (Node<V> p = f; p != lastRun; p = p.next) {
1973	>	int ph = p.hash;
1974	>	Object pk = p.key; V pv = p.val;
1975	>	if ((ph & n) == 0)
1976	>	lo = new Node<V>(ph, pk, pv, lo);
1977	>	else
1978	>	hi = new Node<V>(ph, pk, pv, hi);
1979	>	}
1980	>	setTabAt(nextTab, i, lo);
1981	>	setTabAt(nextTab, i + n, hi);
1982	>	setTabAt(tab, i, fwd);
1983	>	advance = true;
1984		}
2160	–	if (!validated)
2161	–	continue;
1985		}
1986		}
1987	<	else if ((fh & LOCKED) == 0 && f.casHash(fh, fh|LOCKED)) {
1988	<	boolean validated = false;
1989	<	try {              // split to lo and hi lists; copying as needed
1987	>	else if ((fk = f.key) instanceof TreeBin) {
1988	>	TreeBin<V> t = (TreeBin<V>)fk;
1989	>	t.acquire(0);
1990	>	try {
1991		if (tabAt(tab, i) == f) {
1992	<	validated = true;
1993	<	splitBin(nextTab, i, f);
1992	>	TreeBin<V> lt = new TreeBin<V>();
1993	>	TreeBin<V> ht = new TreeBin<V>();
1994	>	int lc = 0, hc = 0;
1995	>	for (Node<V> e = t.first; e != null; e = e.next) {
1996	>	int h = e.hash;
1997	>	Object k = e.key; V v = e.val;
1998	>	if ((h & n) == 0) {
1999	>	++lc;
2000	>	lt.putTreeNode(h, k, v);
2001	>	}
2002	>	else {
2003	>	++hc;
2004	>	ht.putTreeNode(h, k, v);
2005	>	}
2006	>	}
2007	>	Node<V> ln, hn; // throw away trees if too small
2008	>	if (lc < TREE_THRESHOLD) {
2009	>	ln = null;
2010	>	for (Node<V> p = lt.first; p != null; p = p.next)
2011	>	ln = new Node<V>(p.hash, p.key, p.val, ln);
2012	>	}
2013	>	else
2014	>	ln = new Node<V>(MOVED, lt, null, null);
2015	>	setTabAt(nextTab, i, ln);
2016	>	if (hc < TREE_THRESHOLD) {
2017	>	hn = null;
2018	>	for (Node<V> p = ht.first; p != null; p = p.next)
2019	>	hn = new Node<V>(p.hash, p.key, p.val, hn);
2020	>	}
2021	>	else
2022	>	hn = new Node<V>(MOVED, ht, null, null);
2023	>	setTabAt(nextTab, i + n, hn);
2024		setTabAt(tab, i, fwd);
2025	+	advance = true;
2026		}
2027		} finally {
2028	<	if (!f.casHash(fh | LOCKED, fh)) {
2174	<	f.hash = fh;
2175	<	synchronized (f) { f.notifyAll(); };
2176	<	}
2028	>	t.release(0);
2029		}
2178	–	if (!validated)
2179	–	continue;
2180	–	}
2181	–	else {
2182	–	if (buffer == null) // initialize buffer for revisits
2183	–	buffer = new int[TRANSFER_BUFFER_SIZE];
2184	–	if (bin < 0 && bufferIndex > 0) {
2185	–	int j = buffer[--bufferIndex];
2186	–	buffer[bufferIndex] = i;
2187	–	i = j;         // swap with another bin
2188	–	continue;
2189	–	}
2190	–	if (bin < 0 || nbuffered >= TRANSFER_BUFFER_SIZE) {
2191	–	f.tryAwaitLock(tab, i);
2192	–	continue;      // no other options -- block
2193	–	}
2194	–	if (rev == null)   // initialize reverse-forwarder
2195	–	rev = new Node(MOVED, tab, null, null);
2196	–	if (tabAt(tab, i) != f || (f.hash & LOCKED) == 0)
2197	–	continue;      // recheck before adding to list
2198	–	buffer[nbuffered++] = i;
2199	–	setTabAt(nextTab, i, rev);     // install place-holders
2200	–	setTabAt(nextTab, i + n, rev);
2201	–	}
2202	–
2203	–	if (bin > 0)
2204	–	i = --bin;
2205	–	else if (buffer != null && nbuffered > 0) {
2206	–	bin = -1;
2207	–	i = buffer[bufferIndex = --nbuffered];
2030		}
2031		else
2032	<	return nextTab;
2032	>	advance = true; // already processed
2033		}
2034		}
2035
2036	<	/**
2215	<	* Splits a normal bin with list headed by e into lo and hi parts;
2216	<	* installs in given table.
2217	<	*/
2218	<	private static void splitBin(Node[] nextTab, int i, Node e) {
2219	<	int bit = nextTab.length >>> 1; // bit to split on
2220	<	int runBit = e.hash & bit;
2221	<	Node lastRun = e, lo = null, hi = null;
2222	<	for (Node p = e.next; p != null; p = p.next) {
2223	<	int b = p.hash & bit;
2224	<	if (b != runBit) {
2225	<	runBit = b;
2226	<	lastRun = p;
2227	<	}
2228	<	}
2229	<	if (runBit == 0)
2230	<	lo = lastRun;
2231	<	else
2232	<	hi = lastRun;
2233	<	for (Node p = e; p != lastRun; p = p.next) {
2234	<	int ph = p.hash & HASH_BITS;
2235	<	Object pk = p.key, pv = p.val;
2236	<	if ((ph & bit) == 0)
2237	<	lo = new Node(ph, pk, pv, lo);
2238	<	else
2239	<	hi = new Node(ph, pk, pv, hi);
2240	<	}
2241	<	setTabAt(nextTab, i, lo);
2242	<	setTabAt(nextTab, i + bit, hi);
2243	<	}
2036	>	/* ---------------- Counter support -------------- */
2037
2038	<	/**
2039	<	* Splits a tree bin into lo and hi parts; installs in given table.
2040	<	*/
2041	<	private static void splitTreeBin(Node[] nextTab, int i, TreeBin t) {
2042	<	int bit = nextTab.length >>> 1;
2043	<	TreeBin lt = new TreeBin();
2044	<	TreeBin ht = new TreeBin();
2252	<	int lc = 0, hc = 0;
2253	<	for (Node e = t.first; e != null; e = e.next) {
2254	<	int h = e.hash & HASH_BITS;
2255	<	Object k = e.key, v = e.val;
2256	<	if ((h & bit) == 0) {
2257	<	++lc;
2258	<	lt.putTreeNode(h, k, v);
2259	<	}
2260	<	else {
2261	<	++hc;
2262	<	ht.putTreeNode(h, k, v);
2038	>	final long sumCount() {
2039	>	Cell[] as = counterCells; Cell a;
2040	>	long sum = baseCount;
2041	>	if (as != null) {
2042	>	for (int i = 0; i < as.length; ++i) {
2043	>	if ((a = as[i]) != null)
2044	>	sum += a.value;
2045		}
2046		}
2047	<	Node ln, hn; // throw away trees if too small
2266	<	if (lc <= (TREE_THRESHOLD >>> 1)) {
2267	<	ln = null;
2268	<	for (Node p = lt.first; p != null; p = p.next)
2269	<	ln = new Node(p.hash, p.key, p.val, ln);
2270	<	}
2271	<	else
2272	<	ln = new Node(MOVED, lt, null, null);
2273	<	setTabAt(nextTab, i, ln);
2274	<	if (hc <= (TREE_THRESHOLD >>> 1)) {
2275	<	hn = null;
2276	<	for (Node p = ht.first; p != null; p = p.next)
2277	<	hn = new Node(p.hash, p.key, p.val, hn);
2278	<	}
2279	<	else
2280	<	hn = new Node(MOVED, ht, null, null);
2281	<	setTabAt(nextTab, i + bit, hn);
2047	>	return sum;
2048		}
2049
2050	<	/**
2051	<	* Implementation for clear. Steps through each bin, removing all
2052	<	* nodes.
2053	<	*/
2054	<	private final void internalClear() {
2055	<	long delta = 0L; // negative number of deletions
2056	<	int i = 0;
2057	<	Node[] tab = table;
2058	<	while (tab != null && i < tab.length) {
2059	<	int fh; Object fk;
2060	<	Node f = tabAt(tab, i);
2061	<	if (f == null)
2062	<	++i;
2063	<	else if ((fh = f.hash) == MOVED) {
2064	<	if ((fk = f.key) instanceof TreeBin) {
2065	<	TreeBin t = (TreeBin)fk;
2066	<	t.acquire(0);
2067	<	try {
2068	<	if (tabAt(tab, i) == f) {
2069	<	for (Node p = t.first; p != null; p = p.next) {
2070	<	if (p.val != null) { // (currently always true)
2071	<	p.val = null;
2072	<	--delta;
2050	>	// See LongAdder version for explanation
2051	>	private final void fullAddCount(long x, boolean wasUncontended) {
2052	>	int h;
2053	>	if ((h = ThreadLocalRandom.getProbe()) == 0) {
2054	>	ThreadLocalRandom.localInit();      // force initialization
2055	>	h = ThreadLocalRandom.getProbe();
2056	>	wasUncontended = true;
2057	>	}
2058	>	boolean collide = false;                // True if last slot nonempty
2059	>	for (;;) {
2060	>	Cell[] as; Cell a; int n; long v;
2061	>	if ((as = counterCells) != null && (n = as.length) > 0) {
2062	>	if ((a = as[(n - 1) & h]) == null) {
2063	>	if (cellsBusy == 0) {            // Try to attach new Cell
2064	>	Cell r = new Cell(x); // Optimistic create
2065	>	if (cellsBusy == 0 &&
2066	>	U.compareAndSwapInt(this, CELLSBUSY, 0, 1)) {
2067	>	boolean created = false;
2068	>	try {               // Recheck under lock
2069	>	Cell[] rs; int m, j;
2070	>	if ((rs = counterCells) != null &&
2071	>	(m = rs.length) > 0 &&
2072	>	rs[j = (m - 1) & h] == null) {
2073	>	rs[j] = r;
2074	>	created = true;
2075		}
2076	+	} finally {
2077	+	cellsBusy = 0;
2078		}
2079	<	t.first = null;
2080	<	t.root = null;
2081	<	++i;
2079	>	if (created)
2080	>	break;
2081	>	continue;           // Slot is now non-empty
2082	>	}
2083	>	}
2084	>	collide = false;
2085	>	}
2086	>	else if (!wasUncontended)       // CAS already known to fail
2087	>	wasUncontended = true;      // Continue after rehash
2088	>	else if (U.compareAndSwapLong(a, CELLVALUE, v = a.value, v + x))
2089	>	break;
2090	>	else if (counterCells != as || n >= NCPU)
2091	>	collide = false;            // At max size or stale
2092	>	else if (!collide)
2093	>	collide = true;
2094	>	else if (cellsBusy == 0 &&
2095	>	U.compareAndSwapInt(this, CELLSBUSY, 0, 1)) {
2096	>	try {
2097	>	if (counterCells == as) {// Expand table unless stale
2098	>	Cell[] rs = new Cell[n << 1];
2099	>	for (int i = 0; i < n; ++i)
2100	>	rs[i] = as[i];
2101	>	counterCells = rs;
2102		}
2103		} finally {
2104	<	t.release(0);
2104	>	cellsBusy = 0;
2105		}
2106	+	collide = false;
2107	+	continue;                   // Retry with expanded table
2108		}
2109	<	else
2318	<	tab = (Node[])fk;
2109	>	h = ThreadLocalRandom.advanceProbe(h);
2110		}
2111	<	else if ((fh & LOCKED) != 0) {
2112	<	counter.add(delta); // opportunistically update count
2113	<	delta = 0L;
2114	<	f.tryAwaitLock(tab, i);
2115	<	}
2116	<	else if (f.casHash(fh, fh | LOCKED)) {
2117	<	try {
2118	<	if (tabAt(tab, i) == f) {
2119	<	for (Node e = f; e != null; e = e.next) {
2329	<	if (e.val != null) {  // (currently always true)
2330	<	e.val = null;
2331	<	--delta;
2332	<	}
2333	<	}
2334	<	setTabAt(tab, i, null);
2335	<	++i;
2111	>	else if (cellsBusy == 0 && counterCells == as &&
2112	>	U.compareAndSwapInt(this, CELLSBUSY, 0, 1)) {
2113	>	boolean init = false;
2114	>	try {                           // Initialize table
2115	>	if (counterCells == as) {
2116	>	Cell[] rs = new Cell[2];
2117	>	rs[h & 1] = new Cell(x);
2118	>	counterCells = rs;
2119	>	init = true;
2120		}
2121		} finally {
2122	<	if (!f.casHash(fh | LOCKED, fh)) {
2339	<	f.hash = fh;
2340	<	synchronized (f) { f.notifyAll(); };
2341	<	}
2122	>	cellsBusy = 0;
2123		}
2124	+	if (init)
2125	+	break;
2126		}
2127	+	else if (U.compareAndSwapLong(this, BASECOUNT, v = baseCount, v + x))
2128	+	break;                          // Fall back on using base
2129		}
2345	–	if (delta != 0)
2346	–	counter.add(delta);
2130		}
2131
2132		/* ----------------Table Traversal -------------- */
#	Line 2386 | Line 2169 | public class ConcurrentHashMap<K, V>
2169		* across threads, iteration terminates if a bounds checks fails
2170		* for a table read.
2171		*
2172	<	* This class extends ForkJoinTask to streamline parallel
2173	<	* iteration in bulk operations (see BulkTask). This adds only an
2174	<	* int of space overhead, which is close enough to negligible in
2175	<	* cases where it is not needed to not worry about it.  Because
2176	<	* ForkJoinTask is Serializable, but iterators need not be, we
2177	<	* need to add warning suppressions.
2178	<	*/
2179	<	@SuppressWarnings("serial") static class Traverser<K,V,R> extends ForkJoinTask<R> {
2180	<	final ConcurrentHashMap<K, V> map;
2181	<	Node next;           // the next entry to use
2182	<	Object nextKey;      // cached key field of next
2183	<	Object nextVal;      // cached val field of next
2184	<	Node[] tab;          // current table; updated if resized
2172	>	* This class supports both Spliterator-based traversal and
2173	>	* CountedCompleter-based bulk tasks. The same "batch" field is
2174	>	* used, but in slightly different ways, in the two cases.  For
2175	>	* Spliterators, it is a saturating (at Integer.MAX_VALUE)
2176	>	* estimate of element coverage. For CHM tasks, it is a pre-scaled
2177	>	* size that halves down to zero for leaf tasks, that is only
2178	>	* computed upon execution of the task. (Tasks can be submitted to
2179	>	* any pool, of any size, so we don't know scale factors until
2180	>	* running.)
2181	>	*
2182	>	* This class extends CountedCompleter to streamline parallel
2183	>	* iteration in bulk operations. This adds only a few fields of
2184	>	* space overhead, which is small enough in cases where it is not
2185	>	* needed to not worry about it.  Because CountedCompleter is
2186	>	* Serializable, but iterators need not be, we need to add warning
2187	>	* suppressions.
2188	>	*/
2189	>	@SuppressWarnings("serial") static class Traverser<K,V,R>
2190	>	extends CountedCompleter<R> {
2191	>	final ConcurrentHashMap<K,V> map;
2192	>	Node<V> next;        // the next entry to use
2193	>	K nextKey;           // cached key field of next
2194	>	V nextVal;           // cached val field of next
2195	>	Node<V>[] tab;       // current table; updated if resized
2196		int index;           // index of bin to use next
2197		int baseIndex;       // current index of initial table
2198		int baseLimit;       // index bound for initial table
2199		int baseSize;        // initial table size
2200	<
2200	>	int batch;           // split control
2201		/** Creates iterator for all entries in the table. */
2202	<	Traverser(ConcurrentHashMap<K, V> map) {
2202	>	Traverser(ConcurrentHashMap<K,V> map) {
2203		this.map = map;
2204	+	Node<V>[] t;
2205	+	if ((t = tab = map.table) != null)
2206	+	baseLimit = baseSize = t.length;
2207		}
2208
2209	<	/** Creates iterator for split() methods */
2210	<	Traverser(Traverser<K,V,?> it) {
2211	<	ConcurrentHashMap<K, V> m; Node[] t;
2212	<	if ((m = this.map = it.map) == null)
2213	<	t = null;
2214	<	else if ((t = it.tab) == null && // force parent tab initialization
2215	<	(t = it.tab = m.table) != null)
2216	<	it.baseLimit = it.baseSize = t.length;
2217	<	this.tab = t;
2218	<	this.baseSize = it.baseSize;
2219	<	it.baseLimit = this.index = this.baseIndex =
2220	<	((this.baseLimit = it.baseLimit) + it.baseIndex + 1) >>> 1;
2209	>	/** Task constructor */
2210	>	Traverser(ConcurrentHashMap<K,V> map, Traverser<K,V,?> it, int batch) {
2211	>	super(it);
2212	>	this.map = map;
2213	>	this.batch = batch; // -1 if unknown
2214	>	if (it == null) {
2215	>	Node<V>[] t;
2216	>	if ((t = tab = map.table) != null)
2217	>	baseLimit = baseSize = t.length;
2218	>	}
2219	>	else { // split parent
2220	>	this.tab = it.tab;
2221	>	this.baseSize = it.baseSize;
2222	>	int hi = this.baseLimit = it.baseLimit;
2223	>	it.baseLimit = this.index = this.baseIndex =
2224	>	(hi + it.baseIndex + 1) >>> 1;
2225	>	}
2226	>	}
2227	>
2228	>	/** Spliterator constructor */
2229	>	Traverser(ConcurrentHashMap<K,V> map, Traverser<K,V,?> it) {
2230	>	super(it);
2231	>	this.map = map;
2232	>	if (it == null) {
2233	>	Node<V>[] t;
2234	>	if ((t = tab = map.table) != null)
2235	>	baseLimit = baseSize = t.length;
2236	>	long n = map.sumCount();
2237	>	batch = ((n > (long)Integer.MAX_VALUE) ? Integer.MAX_VALUE :
2238	>	(int)n);
2239	>	}
2240	>	else {
2241	>	this.tab = it.tab;
2242	>	this.baseSize = it.baseSize;
2243	>	int hi = this.baseLimit = it.baseLimit;
2244	>	it.baseLimit = this.index = this.baseIndex =
2245	>	(hi + it.baseIndex + 1) >>> 1;
2246	>	this.batch = it.batch >>>= 1;
2247	>	}
2248		}
2249
2250		/**
2251		* Advances next; returns nextVal or null if terminated.
2252		* See above for explanation.
2253		*/
2254	<	final Object advance() {
2255	<	Node e = next;
2256	<	Object ev = null;
2254	>	@SuppressWarnings("unchecked") final V advance() {
2255	>	Node<V> e = next;
2256	>	V ev = null;
2257		outer: do {
2258		if (e != null)                  // advance past used/skipped node
2259		e = e.next;
2260		while (e == null) {             // get to next non-null bin
2261	<	ConcurrentHashMap<K, V> m;
2262	<	Node[] t; int b, i, n; Object ek; // checks must use locals
2261	>	ConcurrentHashMap<K,V> m;
2262	>	Node<V>[] t; int b, i, n; Object ek; //  must use locals
2263		if ((t = tab) != null)
2264		n = t.length;
2265		else if ((m = map) != null && (t = tab = m.table) != null)
#	Line 2445 | Line 2269 | public class ConcurrentHashMap<K, V>
2269		if ((b = baseIndex) >= baseLimit ||
2270		(i = index) < 0 || i >= n)
2271		break outer;
2272	<	if ((e = tabAt(t, i)) != null && e.hash == MOVED) {
2272	>	if ((e = tabAt(t, i)) != null && e.hash < 0) {
2273		if ((ek = e.key) instanceof TreeBin)
2274	<	e = ((TreeBin)ek).first;
2274	>	e = ((TreeBin<V>)ek).first;
2275		else {
2276	<	tab = (Node[])ek;
2276	>	tab = (Node<V>[])ek;
2277		continue;           // restarts due to null val
2278		}
2279		}                           // visit upper slots if present
2280		index = (i += baseSize) < n ? i : (baseIndex = b + 1);
2281		}
2282	<	nextKey = e.key;
2282	>	nextKey = (K)e.key;
2283		} while ((ev = e.val) == null);    // skip deleted or special nodes
2284		next = e;
2285		return nextVal = ev;
2286		}
2287
2288		public final void remove() {
2289	<	Object k = nextKey;
2289	>	K k = nextKey;
2290		if (k == null && (advance() == null || (k = nextKey) == null))
2291		throw new IllegalStateException();
2292		map.internalReplace(k, null, null);
#	Line 2473 | Line 2297 | public class ConcurrentHashMap<K, V>
2297		}
2298
2299		public final boolean hasMoreElements() { return hasNext(); }
2300	<	public final void setRawResult(Object x) { }
2301	<	public R getRawResult() { return null; }
2302	<	public boolean exec() { return true; }
2300	>
2301	>	public void compute() { } // default no-op CountedCompleter body
2302	>
2303	>	/**
2304	>	* Returns a batch value > 0 if this task should (and must) be
2305	>	* split, if so, adding to pending count, and in any case
2306	>	* updating batch value. The initial batch value is approx
2307	>	* exp2 of the number of times (minus one) to split task by
2308	>	* two before executing leaf action. This value is faster to
2309	>	* compute and more convenient to use as a guide to splitting
2310	>	* than is the depth, since it is used while dividing by two
2311	>	* anyway.
2312	>	*/
2313	>	final int preSplit() {
2314	>	int b;  ForkJoinPool pool;
2315	>	if ((b = batch) < 0) { // force initialization
2316	>	int sp = (((pool = getPool()) == null) ?
2317	>	ForkJoinPool.getCommonPoolParallelism() :
2318	>	pool.getParallelism()) << 3; // slack of 8
2319	>	long n = map.sumCount();
2320	>	b = (n <= 0L) ? 0 : (n < (long)sp) ? (int)n : sp;
2321	>	}
2322	>	b = (b <= 1 || baseIndex == baseLimit) ? 0 : (b >>> 1);
2323	>	if ((batch = b) > 0)
2324	>	addToPendingCount(1);
2325	>	return b;
2326	>	}
2327	>
2328	>	// spliterator support
2329	>
2330	>	public long estimateSize() {
2331	>	return batch;
2332	>	}
2333		}
2334
2335		/* ---------------- Public operations -------------- */
#	Line 2484 | Line 2338 | public class ConcurrentHashMap<K, V>
2338		* Creates a new, empty map with the default initial table size (16).
2339		*/
2340		public ConcurrentHashMap() {
2487	–	this.counter = new LongAdder();
2341		}
2342
2343		/**
#	Line 2503 | Line 2356 | public class ConcurrentHashMap<K, V>
2356		int cap = ((initialCapacity >= (MAXIMUM_CAPACITY >>> 1)) ?
2357		MAXIMUM_CAPACITY :
2358		tableSizeFor(initialCapacity + (initialCapacity >>> 1) + 1));
2506	–	this.counter = new LongAdder();
2359		this.sizeCtl = cap;
2360		}
2361
#	Line 2513 | Line 2365 | public class ConcurrentHashMap<K, V>
2365		* @param m the map
2366		*/
2367		public ConcurrentHashMap(Map<? extends K, ? extends V> m) {
2516	–	this.counter = new LongAdder();
2368		this.sizeCtl = DEFAULT_CAPACITY;
2369		internalPutAll(m);
2370		}
#	Line 2564 | Line 2415 | public class ConcurrentHashMap<K, V>
2415		long size = (long)(1.0 + (long)initialCapacity / loadFactor);
2416		int cap = (size >= (long)MAXIMUM_CAPACITY) ?
2417		MAXIMUM_CAPACITY : tableSizeFor((int)size);
2567	–	this.counter = new LongAdder();
2418		this.sizeCtl = cap;
2419		}
2420
#	Line 2575 | Line 2425 | public class ConcurrentHashMap<K, V>
2425		* @return the new set
2426		*/
2427		public static <K> KeySetView<K,Boolean> newKeySet() {
2428	<	return new KeySetView<K,Boolean>(new ConcurrentHashMap<K,Boolean>(),
2429	<	Boolean.TRUE);
2428	>	return new KeySetView<K,Boolean>
2429	>	(new ConcurrentHashMap<K,Boolean>(), Boolean.TRUE);
2430		}
2431
2432		/**
#	Line 2590 | Line 2440 | public class ConcurrentHashMap<K, V>
2440		* @return the new set
2441		*/
2442		public static <K> KeySetView<K,Boolean> newKeySet(int initialCapacity) {
2443	<	return new KeySetView<K,Boolean>(new ConcurrentHashMap<K,Boolean>(initialCapacity),
2444	<	Boolean.TRUE);
2443	>	return new KeySetView<K,Boolean>
2444	>	(new ConcurrentHashMap<K,Boolean>(initialCapacity), Boolean.TRUE);
2445		}
2446
2447		/**
2448		* {@inheritDoc}
2449		*/
2450		public boolean isEmpty() {
2451	<	return counter.sum() <= 0L; // ignore transient negative values
2451	>	return sumCount() <= 0L; // ignore transient negative values
2452		}
2453
2454		/**
2455		* {@inheritDoc}
2456		*/
2457		public int size() {
2458	<	long n = counter.sum();
2458	>	long n = sumCount();
2459		return ((n < 0L) ? 0 :
2460		(n > (long)Integer.MAX_VALUE) ? Integer.MAX_VALUE :
2461		(int)n);
#	Line 2615 | Line 2465 | public class ConcurrentHashMap<K, V>
2465		* Returns the number of mappings. This method should be used
2466		* instead of {@link #size} because a ConcurrentHashMap may
2467		* contain more mappings than can be represented as an int. The
2468	<	* value returned is a snapshot; the actual count may differ if
2469	<	* there are ongoing concurrent insertions or removals.
2468	>	* value returned is an estimate; the actual count may differ if
2469	>	* there are concurrent insertions or removals.
2470		*
2471		* @return the number of mappings
2472		*/
2473		public long mappingCount() {
2474	<	long n = counter.sum();
2474	>	long n = sumCount();
2475		return (n < 0L) ? 0L : n; // ignore transient negative values
2476		}
2477
#	Line 2636 | Line 2486 | public class ConcurrentHashMap<K, V>
2486		*
2487		* @throws NullPointerException if the specified key is null
2488		*/
2489	<	@SuppressWarnings("unchecked") public V get(Object key) {
2490	<	if (key == null)
2641	<	throw new NullPointerException();
2642	<	return (V)internalGet(key);
2489	>	public V get(Object key) {
2490	>	return internalGet(key);
2491		}
2492
2493		/**
#	Line 2652 | Line 2500 | public class ConcurrentHashMap<K, V>
2500		* @return the mapping for the key, if present; else the defaultValue
2501		* @throws NullPointerException if the specified key is null
2502		*/
2503	<	@SuppressWarnings("unchecked") public V getValueOrDefault(Object key, V defaultValue) {
2504	<	if (key == null)
2505	<	throw new NullPointerException();
2658	<	V v = (V) internalGet(key);
2659	<	return v == null ? defaultValue : v;
2503	>	public V getValueOrDefault(Object key, V defaultValue) {
2504	>	V v;
2505	>	return (v = internalGet(key)) == null ? defaultValue : v;
2506		}
2507
2508		/**
#	Line 2669 | Line 2515 | public class ConcurrentHashMap<K, V>
2515		* @throws NullPointerException if the specified key is null
2516		*/
2517		public boolean containsKey(Object key) {
2672	–	if (key == null)
2673	–	throw new NullPointerException();
2518		return internalGet(key) != null;
2519		}
2520
#	Line 2687 | Line 2531 | public class ConcurrentHashMap<K, V>
2531		public boolean containsValue(Object value) {
2532		if (value == null)
2533		throw new NullPointerException();
2534	<	Object v;
2534	>	V v;
2535		Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
2536		while ((v = it.advance()) != null) {
2537		if (v == value || value.equals(v))
#	Line 2699 | Line 2543 | public class ConcurrentHashMap<K, V>
2543		/**
2544		* Legacy method testing if some key maps into the specified value
2545		* in this table.  This method is identical in functionality to
2546	<	* {@link #containsValue}, and exists solely to ensure
2546	>	* {@link #containsValue(Object)}, and exists solely to ensure
2547		* full compatibility with class {@link java.util.Hashtable},
2548		* which supported this method prior to introduction of the
2549		* Java Collections framework.
#	Line 2711 | Line 2555 | public class ConcurrentHashMap<K, V>
2555		*         {@code false} otherwise
2556		* @throws NullPointerException if the specified value is null
2557		*/
2558	<	public boolean contains(Object value) {
2558	>	@Deprecated public boolean contains(Object value) {
2559		return containsValue(value);
2560		}
2561
#	Line 2719 | Line 2563 | public class ConcurrentHashMap<K, V>
2563		* Maps the specified key to the specified value in this table.
2564		* Neither the key nor the value can be null.
2565		*
2566	<	* <p> The value can be retrieved by calling the {@code get} method
2566	>	* <p>The value can be retrieved by calling the {@code get} method
2567		* with a key that is equal to the original key.
2568		*
2569		* @param key key with which the specified value is to be associated
#	Line 2728 | Line 2572 | public class ConcurrentHashMap<K, V>
2572		*         {@code null} if there was no mapping for {@code key}
2573		* @throws NullPointerException if the specified key or value is null
2574		*/
2575	<	@SuppressWarnings("unchecked") public V put(K key, V value) {
2576	<	if (key == null || value == null)
2733	<	throw new NullPointerException();
2734	<	return (V)internalPut(key, value);
2575	>	public V put(K key, V value) {
2576	>	return internalPut(key, value, false);
2577		}
2578
2579		/**
#	Line 2741 | Line 2583 | public class ConcurrentHashMap<K, V>
2583		*         or {@code null} if there was no mapping for the key
2584		* @throws NullPointerException if the specified key or value is null
2585		*/
2586	<	@SuppressWarnings("unchecked") public V putIfAbsent(K key, V value) {
2587	<	if (key == null || value == null)
2746	<	throw new NullPointerException();
2747	<	return (V)internalPutIfAbsent(key, value);
2586	>	public V putIfAbsent(K key, V value) {
2587	>	return internalPut(key, value, true);
2588		}
2589
2590		/**
#	Line 2759 | Line 2599 | public class ConcurrentHashMap<K, V>
2599		}
2600
2601		/**
2602	<	* If the specified key is not already associated with a value,
2603	<	* computes its value using the given mappingFunction and enters
2604	<	* it into the map unless null.  This is equivalent to
2605	<	* <pre> {@code
2606	<	* if (map.containsKey(key))
2607	<	*   return map.get(key);
2608	<	* value = mappingFunction.apply(key);
2609	<	* if (value != null)
2610	<	*   map.put(key, value);
2771	<	* return value;}</pre>
2772	<	*
2773	<	* except that the action is performed atomically.  If the
2774	<	* function returns {@code null} no mapping is recorded. If the
2775	<	* function itself throws an (unchecked) exception, the exception
2776	<	* is rethrown to its caller, and no mapping is recorded.  Some
2777	<	* attempted update operations on this map by other threads may be
2778	<	* blocked while computation is in progress, so the computation
2779	<	* should be short and simple, and must not attempt to update any
2780	<	* other mappings of this Map. The most appropriate usage is to
2781	<	* construct a new object serving as an initial mapped value, or
2782	<	* memoized result, as in:
2783	<	*
2784	<	*  <pre> {@code
2785	<	* map.computeIfAbsent(key, new Fun<K, V>() {
2786	<	*   public V map(K k) { return new Value(f(k)); }});}</pre>
2602	>	* If the specified key is not already associated with a value (or
2603	>	* is mapped to {@code null}), attempts to compute its value using
2604	>	* the given mapping function and enters it into this map unless
2605	>	* {@code null}. The entire method invocation is performed
2606	>	* atomically, so the function is applied at most once per key.
2607	>	* Some attempted update operations on this map by other threads
2608	>	* may be blocked while computation is in progress, so the
2609	>	* computation should be short and simple, and must not attempt to
2610	>	* update any other mappings of this Map.
2611		*
2612		* @param key key with which the specified value is to be associated
2613		* @param mappingFunction the function to compute a value
#	Line 2797 | Line 2621 | public class ConcurrentHashMap<K, V>
2621		* @throws RuntimeException or Error if the mappingFunction does so,
2622		*         in which case the mapping is left unestablished
2623		*/
2624	<	@SuppressWarnings("unchecked") public V computeIfAbsent
2625	<	(K key, Fun<? super K, ? extends V> mappingFunction) {
2626	<	if (key == null || mappingFunction == null)
2803	<	throw new NullPointerException();
2804	<	return (V)internalComputeIfAbsent(key, mappingFunction);
2624	>	public V computeIfAbsent
2625	>	(K key, Function<? super K, ? extends V> mappingFunction) {
2626	>	return internalComputeIfAbsent(key, mappingFunction);
2627		}
2628
2629		/**
2630	<	* If the given key is present, computes a new mapping value given a key and
2631	<	* its current mapped value. This is equivalent to
2632	<	*  <pre> {@code
2633	<	*   if (map.containsKey(key)) {
2812	<	*     value = remappingFunction.apply(key, map.get(key));
2813	<	*     if (value != null)
2814	<	*       map.put(key, value);
2815	<	*     else
2816	<	*       map.remove(key);
2817	<	*   }
2818	<	* }</pre>
2819	<	*
2820	<	* except that the action is performed atomically.  If the
2821	<	* function returns {@code null}, the mapping is removed.  If the
2822	<	* function itself throws an (unchecked) exception, the exception
2823	<	* is rethrown to its caller, and the current mapping is left
2824	<	* unchanged.  Some attempted update operations on this map by
2630	>	* If the value for the specified key is present and non-null,
2631	>	* attempts to compute a new mapping given the key and its current
2632	>	* mapped value.  The entire method invocation is performed
2633	>	* atomically.  Some attempted update operations on this map by
2634		* other threads may be blocked while computation is in progress,
2635		* so the computation should be short and simple, and must not
2636	<	* attempt to update any other mappings of this Map. For example,
2828	<	* to either create or append new messages to a value mapping:
2636	>	* attempt to update any other mappings of this Map.
2637		*
2638		* @param key key with which the specified value is to be associated
2639		* @param remappingFunction the function to compute a value
#	Line 2838 | Line 2646 | public class ConcurrentHashMap<K, V>
2646		* @throws RuntimeException or Error if the remappingFunction does so,
2647		*         in which case the mapping is unchanged
2648		*/
2649	<	@SuppressWarnings("unchecked") public V computeIfPresent
2650	<	(K key, BiFun<? super K, ? super V, ? extends V> remappingFunction) {
2651	<	if (key == null || remappingFunction == null)
2844	<	throw new NullPointerException();
2845	<	return (V)internalCompute(key, true, remappingFunction);
2649	>	public V computeIfPresent
2650	>	(K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
2651	>	return internalCompute(key, true, remappingFunction);
2652		}
2653
2654		/**
2655	<	* Computes a new mapping value given a key and
2656	<	* its current mapped value (or {@code null} if there is no current
2657	<	* mapping). This is equivalent to
2658	<	*  <pre> {@code
2659	<	*   value = remappingFunction.apply(key, map.get(key));
2660	<	*   if (value != null)
2661	<	*     map.put(key, value);
2856	<	*   else
2857	<	*     map.remove(key);
2858	<	* }</pre>
2859	<	*
2860	<	* except that the action is performed atomically.  If the
2861	<	* function returns {@code null}, the mapping is removed.  If the
2862	<	* function itself throws an (unchecked) exception, the exception
2863	<	* is rethrown to its caller, and the current mapping is left
2864	<	* unchanged.  Some attempted update operations on this map by
2865	<	* other threads may be blocked while computation is in progress,
2866	<	* so the computation should be short and simple, and must not
2867	<	* attempt to update any other mappings of this Map. For example,
2868	<	* to either create or append new messages to a value mapping:
2869	<	*
2870	<	* <pre> {@code
2871	<	* Map<Key, String> map = ...;
2872	<	* final String msg = ...;
2873	<	* map.compute(key, new BiFun<Key, String, String>() {
2874	<	*   public String apply(Key k, String v) {
2875	<	*    return (v == null) ? msg : v + msg;});}}</pre>
2655	>	* Attempts to compute a mapping for the specified key and its
2656	>	* current mapped value (or {@code null} if there is no current
2657	>	* mapping). The entire method invocation is performed atomically.
2658	>	* Some attempted update operations on this map by other threads
2659	>	* may be blocked while computation is in progress, so the
2660	>	* computation should be short and simple, and must not attempt to
2661	>	* update any other mappings of this Map.
2662		*
2663		* @param key key with which the specified value is to be associated
2664		* @param remappingFunction the function to compute a value
#	Line 2885 | Line 2671 | public class ConcurrentHashMap<K, V>
2671		* @throws RuntimeException or Error if the remappingFunction does so,
2672		*         in which case the mapping is unchanged
2673		*/
2674	<	@SuppressWarnings("unchecked") public V compute
2675	<	(K key, BiFun<? super K, ? super V, ? extends V> remappingFunction) {
2676	<	if (key == null || remappingFunction == null)
2891	<	throw new NullPointerException();
2892	<	return (V)internalCompute(key, false, remappingFunction);
2674	>	public V compute
2675	>	(K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
2676	>	return internalCompute(key, false, remappingFunction);
2677		}
2678
2679		/**
2680	<	* If the specified key is not already associated
2681	<	* with a value, associate it with the given value.
2682	<	* Otherwise, replace the value with the results of
2683	<	* the given remapping function. This is equivalent to:
2684	<	*  <pre> {@code
2685	<	*   if (!map.containsKey(key))
2686	<	*     map.put(value);
2687	<	*   else {
2688	<	*     newValue = remappingFunction.apply(map.get(key), value);
2689	<	*     if (value != null)
2690	<	*       map.put(key, value);
2691	<	*     else
2692	<	*       map.remove(key);
2693	<	*   }
2694	<	* }</pre>
2695	<	* except that the action is performed atomically.  If the
2696	<	* function returns {@code null}, the mapping is removed.  If the
2697	<	* function itself throws an (unchecked) exception, the exception
2914	<	* is rethrown to its caller, and the current mapping is left
2915	<	* unchanged.  Some attempted update operations on this map by
2916	<	* other threads may be blocked while computation is in progress,
2917	<	* so the computation should be short and simple, and must not
2918	<	* attempt to update any other mappings of this Map.
2680	>	* If the specified key is not already associated with a
2681	>	* (non-null) value, associates it with the given value.
2682	>	* Otherwise, replaces the value with the results of the given
2683	>	* remapping function, or removes if {@code null}. The entire
2684	>	* method invocation is performed atomically.  Some attempted
2685	>	* update operations on this map by other threads may be blocked
2686	>	* while computation is in progress, so the computation should be
2687	>	* short and simple, and must not attempt to update any other
2688	>	* mappings of this Map.
2689	>	*
2690	>	* @param key key with which the specified value is to be associated
2691	>	* @param value the value to use if absent
2692	>	* @param remappingFunction the function to recompute a value if present
2693	>	* @return the new value associated with the specified key, or null if none
2694	>	* @throws NullPointerException if the specified key or the
2695	>	*         remappingFunction is null
2696	>	* @throws RuntimeException or Error if the remappingFunction does so,
2697	>	*         in which case the mapping is unchanged
2698		*/
2699	<	@SuppressWarnings("unchecked") public V merge
2700	<	(K key, V value, BiFun<? super V, ? super V, ? extends V> remappingFunction) {
2701	<	if (key == null || value == null || remappingFunction == null)
2702	<	throw new NullPointerException();
2924	<	return (V)internalMerge(key, value, remappingFunction);
2699	>	public V merge
2700	>	(K key, V value,
2701	>	BiFunction<? super V, ? super V, ? extends V> remappingFunction) {
2702	>	return internalMerge(key, value, remappingFunction);
2703		}
2704
2705		/**
#	Line 2933 | Line 2711 | public class ConcurrentHashMap<K, V>
2711		*         {@code null} if there was no mapping for {@code key}
2712		* @throws NullPointerException if the specified key is null
2713		*/
2714	<	@SuppressWarnings("unchecked") public V remove(Object key) {
2715	<	if (key == null)
2938	<	throw new NullPointerException();
2939	<	return (V)internalReplace(key, null, null);
2714	>	public V remove(Object key) {
2715	>	return internalReplace(key, null, null);
2716		}
2717
2718		/**
#	Line 2947 | Line 2723 | public class ConcurrentHashMap<K, V>
2723		public boolean remove(Object key, Object value) {
2724		if (key == null)
2725		throw new NullPointerException();
2726	<	if (value == null)
2951	<	return false;
2952	<	return internalReplace(key, null, value) != null;
2726	>	return value != null && internalReplace(key, null, value) != null;
2727		}
2728
2729		/**
#	Line 2970 | Line 2744 | public class ConcurrentHashMap<K, V>
2744		*         or {@code null} if there was no mapping for the key
2745		* @throws NullPointerException if the specified key or value is null
2746		*/
2747	<	@SuppressWarnings("unchecked") public V replace(K key, V value) {
2747	>	public V replace(K key, V value) {
2748		if (key == null || value == null)
2749		throw new NullPointerException();
2750	<	return (V)internalReplace(key, value, null);
2750	>	return internalReplace(key, value, null);
2751		}
2752
2753		/**
#	Line 2998 | Line 2772 | public class ConcurrentHashMap<K, V>
2772		/**
2773		* Returns a {@link Set} view of the keys in this map, using the
2774		* given common mapped value for any additions (i.e., {@link
2775	<	* Collection#add} and {@link Collection#addAll}). This is of
2776	<	* course only appropriate if it is acceptable to use the same
2777	<	* value for all additions from this view.
2775	>	* Collection#add} and {@link Collection#addAll(Collection)}).
2776	>	* This is of course only appropriate if it is acceptable to use
2777	>	* the same value for all additions from this view.
2778		*
2779	<	* @param mappedValue the mapped value to use for any
3006	<	* additions.
2779	>	* @param mappedValue the mapped value to use for any additions
2780		* @return the set view
2781		* @throws NullPointerException if the mappedValue is null
2782		*/
#	Line 3017 | Line 2790 | public class ConcurrentHashMap<K, V>
2790		* Returns a {@link Collection} view of the values contained in this map.
2791		* The collection is backed by the map, so changes to the map are
2792		* reflected in the collection, and vice-versa.
2793	+	*
2794	+	* @return the collection view
2795		*/
2796		public ValuesView<K,V> values() {
2797		ValuesView<K,V> vs = values;
#	Line 3038 | Line 2813 | public class ConcurrentHashMap<K, V>
2813		* and guarantees to traverse elements as they existed upon
2814		* construction of the iterator, and may (but is not guaranteed to)
2815		* reflect any modifications subsequent to construction.
2816	+	*
2817	+	* @return the set view
2818		*/
2819		public Set<Map.Entry<K,V>> entrySet() {
2820		EntrySetView<K,V> es = entrySet;
#	Line 3065 | Line 2842 | public class ConcurrentHashMap<K, V>
2842		}
2843
2844		/**
3068	–	* Returns a partitionable iterator of the keys in this map.
3069	–	*
3070	–	* @return a partitionable iterator of the keys in this map
3071	–	*/
3072	–	public Spliterator<K> keySpliterator() {
3073	–	return new KeyIterator<K,V>(this);
3074	–	}
3075	–
3076	–	/**
3077	–	* Returns a partitionable iterator of the values in this map.
3078	–	*
3079	–	* @return a partitionable iterator of the values in this map
3080	–	*/
3081	–	public Spliterator<V> valueSpliterator() {
3082	–	return new ValueIterator<K,V>(this);
3083	–	}
3084	–
3085	–	/**
3086	–	* Returns a partitionable iterator of the entries in this map.
3087	–	*
3088	–	* @return a partitionable iterator of the entries in this map
3089	–	*/
3090	–	public Spliterator<Map.Entry<K,V>> entrySpliterator() {
3091	–	return new EntryIterator<K,V>(this);
3092	–	}
3093	–
3094	–	/**
2845		* Returns the hash code value for this {@link Map}, i.e.,
2846		* the sum of, for each key-value pair in the map,
2847		* {@code key.hashCode() ^ value.hashCode()}.
#	Line 3101 | Line 2851 | public class ConcurrentHashMap<K, V>
2851		public int hashCode() {
2852		int h = 0;
2853		Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
2854	<	Object v;
2854	>	V v;
2855		while ((v = it.advance()) != null) {
2856		h += it.nextKey.hashCode() ^ v.hashCode();
2857		}
#	Line 3123 | Line 2873 | public class ConcurrentHashMap<K, V>
2873		Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
2874		StringBuilder sb = new StringBuilder();
2875		sb.append('{');
2876	<	Object v;
2876	>	V v;
2877		if ((v = it.advance()) != null) {
2878		for (;;) {
2879	<	Object k = it.nextKey;
2879	>	K k = it.nextKey;
2880		sb.append(k == this ? "(this Map)" : k);
2881		sb.append('=');
2882		sb.append(v == this ? "(this Map)" : v);
#	Line 3154 | Line 2904 | public class ConcurrentHashMap<K, V>
2904		return false;
2905		Map<?,?> m = (Map<?,?>) o;
2906		Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
2907	<	Object val;
2907	>	V val;
2908		while ((val = it.advance()) != null) {
2909		Object v = m.get(it.nextKey);
2910		if (v == null || (v != val && !v.equals(val)))
#	Line 3174 | Line 2924 | public class ConcurrentHashMap<K, V>
2924
2925		/* ----------------Iterators -------------- */
2926
2927	<	@SuppressWarnings("serial") static final class KeyIterator<K,V> extends Traverser<K,V,Object>
2928	<	implements Spliterator<K>, Enumeration<K> {
2929	<	KeyIterator(ConcurrentHashMap<K, V> map) { super(map); }
2930	<	KeyIterator(Traverser<K,V,Object> it) {
2931	<	super(it);
2927	>	@SuppressWarnings("serial") static final class KeyIterator<K,V>
2928	>	extends Traverser<K,V,Object>
2929	>	implements Spliterator<K>, Iterator<K>, Enumeration<K> {
2930	>	KeyIterator(ConcurrentHashMap<K,V> map) { super(map); }
2931	>	KeyIterator(ConcurrentHashMap<K,V> map, Traverser<K,V,Object> it) {
2932	>	super(map, it);
2933	>	}
2934	>	public KeyIterator<K,V> trySplit() {
2935	>	if (tab != null && baseIndex == baseLimit)
2936	>	return null;
2937	>	return new KeyIterator<K,V>(map, this);
2938		}
2939	<	public KeyIterator<K,V> split() {
3184	<	if (nextKey != null)
3185	<	throw new IllegalStateException();
3186	<	return new KeyIterator<K,V>(this);
3187	<	}
3188	<	@SuppressWarnings("unchecked") public final K next() {
2939	>	public final K next() {
2940		if (nextVal == null && advance() == null)
2941		throw new NoSuchElementException();
2942	<	Object k = nextKey;
2942	>	K k = nextKey;
2943		nextVal = null;
2944	<	return (K) k;
2944	>	return k;
2945		}
2946
2947		public final K nextElement() { return next(); }
2948	+
2949	+	public Iterator<K> iterator() { return this; }
2950	+
2951	+	public void forEach(Consumer<? super K> action) {
2952	+	if (action == null) throw new NullPointerException();
2953	+	while (advance() != null)
2954	+	action.accept(nextKey);
2955	+	}
2956	+
2957	+	public boolean tryAdvance(Consumer<? super K> block) {
2958	+	if (block == null) throw new NullPointerException();
2959	+	if (advance() == null)
2960	+	return false;
2961	+	block.accept(nextKey);
2962	+	return true;
2963	+	}
2964	+
2965	+	public int characteristics() {
2966	+	return Spliterator.DISTINCT | Spliterator.CONCURRENT |
2967	+	Spliterator.NONNULL;
2968	+	}
2969	+
2970		}
2971
2972	<	@SuppressWarnings("serial") static final class ValueIterator<K,V> extends Traverser<K,V,Object>
2973	<	implements Spliterator<V>, Enumeration<V> {
2974	<	ValueIterator(ConcurrentHashMap<K, V> map) { super(map); }
2975	<	ValueIterator(Traverser<K,V,Object> it) {
2976	<	super(it);
2972	>	@SuppressWarnings("serial") static final class ValueIterator<K,V>
2973	>	extends Traverser<K,V,Object>
2974	>	implements Spliterator<V>, Iterator<V>, Enumeration<V> {
2975	>	ValueIterator(ConcurrentHashMap<K,V> map) { super(map); }
2976	>	ValueIterator(ConcurrentHashMap<K,V> map, Traverser<K,V,Object> it) {
2977	>	super(map, it);
2978		}
2979	<	public ValueIterator<K,V> split() {
2980	<	if (nextKey != null)
2981	<	throw new IllegalStateException();
2982	<	return new ValueIterator<K,V>(this);
2979	>	public ValueIterator<K,V> trySplit() {
2980	>	if (tab != null && baseIndex == baseLimit)
2981	>	return null;
2982	>	return new ValueIterator<K,V>(map, this);
2983		}
2984
2985	<	@SuppressWarnings("unchecked") public final V next() {
2986	<	Object v;
2985	>	public final V next() {
2986	>	V v;
2987		if ((v = nextVal) == null && (v = advance()) == null)
2988		throw new NoSuchElementException();
2989		nextVal = null;
2990	<	return (V) v;
2990	>	return v;
2991		}
2992
2993		public final V nextElement() { return next(); }
2994	+
2995	+	public Iterator<V> iterator() { return this; }
2996	+
2997	+	public void forEach(Consumer<? super V> action) {
2998	+	if (action == null) throw new NullPointerException();
2999	+	V v;
3000	+	while ((v = advance()) != null)
3001	+	action.accept(v);
3002	+	}
3003	+
3004	+	public boolean tryAdvance(Consumer<? super V> block) {
3005	+	V v;
3006	+	if (block == null) throw new NullPointerException();
3007	+	if ((v = advance()) == null)
3008	+	return false;
3009	+	block.accept(v);
3010	+	return true;
3011	+	}
3012	+
3013	+	public int characteristics() {
3014	+	return Spliterator.CONCURRENT | Spliterator.NONNULL;
3015	+	}
3016		}
3017
3018	<	@SuppressWarnings("serial") static final class EntryIterator<K,V> extends Traverser<K,V,Object>
3019	<	implements Spliterator<Map.Entry<K,V>> {
3020	<	EntryIterator(ConcurrentHashMap<K, V> map) { super(map); }
3021	<	EntryIterator(Traverser<K,V,Object> it) {
3022	<	super(it);
3018	>	@SuppressWarnings("serial") static final class EntryIterator<K,V>
3019	>	extends Traverser<K,V,Object>
3020	>	implements Spliterator<Map.Entry<K,V>>, Iterator<Map.Entry<K,V>> {
3021	>	EntryIterator(ConcurrentHashMap<K,V> map) { super(map); }
3022	>	EntryIterator(ConcurrentHashMap<K,V> map, Traverser<K,V,Object> it) {
3023	>	super(map, it);
3024		}
3025	<	public EntryIterator<K,V> split() {
3026	<	if (nextKey != null)
3027	<	throw new IllegalStateException();
3028	<	return new EntryIterator<K,V>(this);
3025	>	public EntryIterator<K,V> trySplit() {
3026	>	if (tab != null && baseIndex == baseLimit)
3027	>	return null;
3028	>	return new EntryIterator<K,V>(map, this);
3029		}
3030
3031	<	@SuppressWarnings("unchecked") public final Map.Entry<K,V> next() {
3032	<	Object v;
3031	>	public final Map.Entry<K,V> next() {
3032	>	V v;
3033		if ((v = nextVal) == null && (v = advance()) == null)
3034		throw new NoSuchElementException();
3035	<	Object k = nextKey;
3035	>	K k = nextKey;
3036		nextVal = null;
3037	<	return new MapEntry<K,V>((K)k, (V)v, map);
3037	>	return new MapEntry<K,V>(k, v, map);
3038	>	}
3039	>
3040	>	public Iterator<Map.Entry<K,V>> iterator() { return this; }
3041	>
3042	>	public void forEach(Consumer<? super Map.Entry<K,V>> action) {
3043	>	if (action == null) throw new NullPointerException();
3044	>	V v;
3045	>	while ((v = advance()) != null)
3046	>	action.accept(entryFor(nextKey, v));
3047	>	}
3048	>
3049	>	public boolean tryAdvance(Consumer<? super Map.Entry<K,V>> block) {
3050	>	V v;
3051	>	if (block == null) throw new NullPointerException();
3052	>	if ((v = advance()) == null)
3053	>	return false;
3054	>	block.accept(entryFor(nextKey, v));
3055	>	return true;
3056	>	}
3057	>
3058	>	public int characteristics() {
3059	>	return Spliterator.DISTINCT | Spliterator.CONCURRENT |
3060	>	Spliterator.NONNULL;
3061		}
3062		}
3063
3064		/**
3065		* Exported Entry for iterators
3066		*/
3067	<	static final class MapEntry<K,V> implements Map.Entry<K, V> {
3067	>	static final class MapEntry<K,V> implements Map.Entry<K,V> {
3068		final K key; // non-null
3069		V val;       // non-null
3070	<	final ConcurrentHashMap<K, V> map;
3071	<	MapEntry(K key, V val, ConcurrentHashMap<K, V> map) {
3070	>	final ConcurrentHashMap<K,V> map;
3071	>	MapEntry(K key, V val, ConcurrentHashMap<K,V> map) {
3072		this.key = key;
3073		this.val = val;
3074		this.map = map;
#	Line 3284 | Line 3104 | public class ConcurrentHashMap<K, V>
3104		}
3105		}
3106
3107	+	/**
3108	+	* Returns exportable snapshot entry for the given key and value
3109	+	* when write-through can't or shouldn't be used.
3110	+	*/
3111	+	static <K,V> AbstractMap.SimpleEntry<K,V> entryFor(K k, V v) {
3112	+	return new AbstractMap.SimpleEntry<K,V>(k, v);
3113	+	}
3114	+
3115		/* ---------------- Serialization Support -------------- */
3116
3117		/**
#	Line 3305 | Line 3133 | public class ConcurrentHashMap<K, V>
3133		* for each key-value mapping, followed by a null pair.
3134		* The key-value mappings are emitted in no particular order.
3135		*/
3136	<	@SuppressWarnings("unchecked") private void writeObject(java.io.ObjectOutputStream s)
3136	>	@SuppressWarnings("unchecked") private void writeObject
3137	>	(java.io.ObjectOutputStream s)
3138		throws java.io.IOException {
3139		if (segments == null) { // for serialization compatibility
3140		segments = (Segment<K,V>[])
#	Line 3315 | Line 3144 | public class ConcurrentHashMap<K, V>
3144		}
3145		s.defaultWriteObject();
3146		Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3147	<	Object v;
3147	>	V v;
3148		while ((v = it.advance()) != null) {
3149		s.writeObject(it.nextKey);
3150		s.writeObject(v);
#	Line 3329 | Line 3158 | public class ConcurrentHashMap<K, V>
3158		* Reconstitutes the instance from a stream (that is, deserializes it).
3159		* @param s the stream
3160		*/
3161	<	@SuppressWarnings("unchecked") private void readObject(java.io.ObjectInputStream s)
3161	>	@SuppressWarnings("unchecked") private void readObject
3162	>	(java.io.ObjectInputStream s)
3163		throws java.io.IOException, ClassNotFoundException {
3164		s.defaultReadObject();
3165		this.segments = null; // unneeded
3336	–	// initialize transient final field
3337	–	UNSAFE.putObjectVolatile(this, counterOffset, new LongAdder());
3166
3167		// Create all nodes, then place in table once size is known
3168		long size = 0L;
3169	<	Node p = null;
3169	>	Node<V> p = null;
3170		for (;;) {
3171		K k = (K) s.readObject();
3172		V v = (V) s.readObject();
3173		if (k != null && v != null) {
3174		int h = spread(k.hashCode());
3175	<	p = new Node(h, k, v, p);
3175	>	p = new Node<V>(h, k, v, p);
3176		++size;
3177		}
3178		else
#	Line 3362 | Line 3190 | public class ConcurrentHashMap<K, V>
3190		int sc = sizeCtl;
3191		boolean collide = false;
3192		if (n > sc &&
3193	<	UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) {
3193	>	U.compareAndSwapInt(this, SIZECTL, sc, -1)) {
3194		try {
3195		if (table == null) {
3196		init = true;
3197	<	Node[] tab = new Node[n];
3197	>	@SuppressWarnings("rawtypes") Node[] rt = new Node[n];
3198	>	Node<V>[] tab = (Node<V>[])rt;
3199		int mask = n - 1;
3200		while (p != null) {
3201		int j = p.hash & mask;
3202	<	Node next = p.next;
3203	<	Node q = p.next = tabAt(tab, j);
3202	>	Node<V> next = p.next;
3203	>	Node<V> q = p.next = tabAt(tab, j);
3204		setTabAt(tab, j, p);
3205		if (!collide && q != null && q.hash == p.hash)
3206		collide = true;
3207		p = next;
3208		}
3209		table = tab;
3210	<	counter.add(size);
3210	>	addCount(size, -1);
3211		sc = n - (n >>> 2);
3212		}
3213		} finally {
3214		sizeCtl = sc;
3215		}
3216		if (collide) { // rescan and convert to TreeBins
3217	<	Node[] tab = table;
3217	>	Node<V>[] tab = table;
3218		for (int i = 0; i < tab.length; ++i) {
3219		int c = 0;
3220	<	for (Node e = tabAt(tab, i); e != null; e = e.next) {
3220	>	for (Node<V> e = tabAt(tab, i); e != null; e = e.next) {
3221		if (++c > TREE_THRESHOLD &&
3222		(e.key instanceof Comparable)) {
3223		replaceWithTreeBin(tab, i, e.key);
#	Line 3400 | Line 3229 | public class ConcurrentHashMap<K, V>
3229		}
3230		if (!init) { // Can only happen if unsafely published.
3231		while (p != null) {
3232	<	internalPut(p.key, p.val);
3232	>	internalPut((K)p.key, p.val, false);
3233		p = p.next;
3234		}
3235		}
3236		}
3237		}
3238
3410	–
3239		// -------------------------------------------------------
3240
3241	<	// Sams
3414	<	/** Interface describing a void action of one argument */
3415	<	public interface Action<A> { void apply(A a); }
3416	<	/** Interface describing a void action of two arguments */
3417	<	public interface BiAction<A,B> { void apply(A a, B b); }
3418	<	/** Interface describing a function of one argument */
3419	<	public interface Fun<A,T> { T apply(A a); }
3420	<	/** Interface describing a function of two arguments */
3421	<	public interface BiFun<A,B,T> { T apply(A a, B b); }
3422	<	/** Interface describing a function of no arguments */
3423	<	public interface Generator<T> { T apply(); }
3424	<	/** Interface describing a function mapping its argument to a double */
3425	<	public interface ObjectToDouble<A> { double apply(A a); }
3426	<	/** Interface describing a function mapping its argument to a long */
3427	<	public interface ObjectToLong<A> { long apply(A a); }
3428	<	/** Interface describing a function mapping its argument to an int */
3429	<	public interface ObjectToInt<A> {int apply(A a); }
3430	<	/** Interface describing a function mapping two arguments to a double */
3431	<	public interface ObjectByObjectToDouble<A,B> { double apply(A a, B b); }
3432	<	/** Interface describing a function mapping two arguments to a long */
3433	<	public interface ObjectByObjectToLong<A,B> { long apply(A a, B b); }
3434	<	/** Interface describing a function mapping two arguments to an int */
3435	<	public interface ObjectByObjectToInt<A,B> {int apply(A a, B b); }
3436	<	/** Interface describing a function mapping a double to a double */
3437	<	public interface DoubleToDouble { double apply(double a); }
3438	<	/** Interface describing a function mapping a long to a long */
3439	<	public interface LongToLong { long apply(long a); }
3440	<	/** Interface describing a function mapping an int to an int */
3441	<	public interface IntToInt { int apply(int a); }
3442	<	/** Interface describing a function mapping two doubles to a double */
3443	<	public interface DoubleByDoubleToDouble { double apply(double a, double b); }
3444	<	/** Interface describing a function mapping two longs to a long */
3445	<	public interface LongByLongToLong { long apply(long a, long b); }
3446	<	/** Interface describing a function mapping two ints to an int */
3447	<	public interface IntByIntToInt { int apply(int a, int b); }
3241	>	// Sequential bulk operations
3242
3243	+	/**
3244	+	* Performs the given action for each (key, value).
3245	+	*
3246	+	* @param action the action
3247	+	*/
3248	+	public void forEachSequentially
3249	+	(BiConsumer<? super K, ? super V> action) {
3250	+	if (action == null) throw new NullPointerException();
3251	+	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3252	+	V v;
3253	+	while ((v = it.advance()) != null)
3254	+	action.accept(it.nextKey, v);
3255	+	}
3256
3257	<	// -------------------------------------------------------
3257	>	/**
3258	>	* Performs the given action for each non-null transformation
3259	>	* of each (key, value).
3260	>	*
3261	>	* @param transformer a function returning the transformation
3262	>	* for an element, or null if there is no transformation (in
3263	>	* which case the action is not applied)
3264	>	* @param action the action
3265	>	*/
3266	>	public <U> void forEachSequentially
3267	>	(BiFunction<? super K, ? super V, ? extends U> transformer,
3268	>	Consumer<? super U> action) {
3269	>	if (transformer == null || action == null)
3270	>	throw new NullPointerException();
3271	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3272	>	V v; U u;
3273	>	while ((v = it.advance()) != null) {
3274	>	if ((u = transformer.apply(it.nextKey, v)) != null)
3275	>	action.accept(u);
3276	>	}
3277	>	}
3278	>
3279	>	/**
3280	>	* Returns a non-null result from applying the given search
3281	>	* function on each (key, value), or null if none.
3282	>	*
3283	>	* @param searchFunction a function returning a non-null
3284	>	* result on success, else null
3285	>	* @return a non-null result from applying the given search
3286	>	* function on each (key, value), or null if none
3287	>	*/
3288	>	public <U> U searchSequentially
3289	>	(BiFunction<? super K, ? super V, ? extends U> searchFunction) {
3290	>	if (searchFunction == null) throw new NullPointerException();
3291	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3292	>	V v; U u;
3293	>	while ((v = it.advance()) != null) {
3294	>	if ((u = searchFunction.apply(it.nextKey, v)) != null)
3295	>	return u;
3296	>	}
3297	>	return null;
3298	>	}
3299	>
3300	>	/**
3301	>	* Returns the result of accumulating the given transformation
3302	>	* of all (key, value) pairs using the given reducer to
3303	>	* combine values, or null if none.
3304	>	*
3305	>	* @param transformer a function returning the transformation
3306	>	* for an element, or null if there is no transformation (in
3307	>	* which case it is not combined)
3308	>	* @param reducer a commutative associative combining function
3309	>	* @return the result of accumulating the given transformation
3310	>	* of all (key, value) pairs
3311	>	*/
3312	>	public <U> U reduceSequentially
3313	>	(BiFunction<? super K, ? super V, ? extends U> transformer,
3314	>	BiFunction<? super U, ? super U, ? extends U> reducer) {
3315	>	if (transformer == null || reducer == null)
3316	>	throw new NullPointerException();
3317	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3318	>	U r = null, u; V v;
3319	>	while ((v = it.advance()) != null) {
3320	>	if ((u = transformer.apply(it.nextKey, v)) != null)
3321	>	r = (r == null) ? u : reducer.apply(r, u);
3322	>	}
3323	>	return r;
3324	>	}
3325	>
3326	>	/**
3327	>	* Returns the result of accumulating the given transformation
3328	>	* of all (key, value) pairs using the given reducer to
3329	>	* combine values, and the given basis as an identity value.
3330	>	*
3331	>	* @param transformer a function returning the transformation
3332	>	* for an element
3333	>	* @param basis the identity (initial default value) for the reduction
3334	>	* @param reducer a commutative associative combining function
3335	>	* @return the result of accumulating the given transformation
3336	>	* of all (key, value) pairs
3337	>	*/
3338	>	public double reduceToDoubleSequentially
3339	>	(ToDoubleBiFunction<? super K, ? super V> transformer,
3340	>	double basis,
3341	>	DoubleBinaryOperator reducer) {
3342	>	if (transformer == null || reducer == null)
3343	>	throw new NullPointerException();
3344	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3345	>	double r = basis; V v;
3346	>	while ((v = it.advance()) != null)
3347	>	r = reducer.applyAsDouble(r, transformer.applyAsDouble(it.nextKey, v));
3348	>	return r;
3349	>	}
3350	>
3351	>	/**
3352	>	* Returns the result of accumulating the given transformation
3353	>	* of all (key, value) pairs using the given reducer to
3354	>	* combine values, and the given basis as an identity value.
3355	>	*
3356	>	* @param transformer a function returning the transformation
3357	>	* for an element
3358	>	* @param basis the identity (initial default value) for the reduction
3359	>	* @param reducer a commutative associative combining function
3360	>	* @return the result of accumulating the given transformation
3361	>	* of all (key, value) pairs
3362	>	*/
3363	>	public long reduceToLongSequentially
3364	>	(ToLongBiFunction<? super K, ? super V> transformer,
3365	>	long basis,
3366	>	LongBinaryOperator reducer) {
3367	>	if (transformer == null || reducer == null)
3368	>	throw new NullPointerException();
3369	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3370	>	long r = basis; V v;
3371	>	while ((v = it.advance()) != null)
3372	>	r = reducer.applyAsLong(r, transformer.applyAsLong(it.nextKey, v));
3373	>	return r;
3374	>	}
3375	>
3376	>	/**
3377	>	* Returns the result of accumulating the given transformation
3378	>	* of all (key, value) pairs using the given reducer to
3379	>	* combine values, and the given basis as an identity value.
3380	>	*
3381	>	* @param transformer a function returning the transformation
3382	>	* for an element
3383	>	* @param basis the identity (initial default value) for the reduction
3384	>	* @param reducer a commutative associative combining function
3385	>	* @return the result of accumulating the given transformation
3386	>	* of all (key, value) pairs
3387	>	*/
3388	>	public int reduceToIntSequentially
3389	>	(ToIntBiFunction<? super K, ? super V> transformer,
3390	>	int basis,
3391	>	IntBinaryOperator reducer) {
3392	>	if (transformer == null || reducer == null)
3393	>	throw new NullPointerException();
3394	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3395	>	int r = basis; V v;
3396	>	while ((v = it.advance()) != null)
3397	>	r = reducer.applyAsInt(r, transformer.applyAsInt(it.nextKey, v));
3398	>	return r;
3399	>	}
3400	>
3401	>	/**
3402	>	* Performs the given action for each key.
3403	>	*
3404	>	* @param action the action
3405	>	*/
3406	>	public void forEachKeySequentially
3407	>	(Consumer<? super K> action) {
3408	>	if (action == null) throw new NullPointerException();
3409	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3410	>	while (it.advance() != null)
3411	>	action.accept(it.nextKey);
3412	>	}
3413	>
3414	>	/**
3415	>	* Performs the given action for each non-null transformation
3416	>	* of each key.
3417	>	*
3418	>	* @param transformer a function returning the transformation
3419	>	* for an element, or null if there is no transformation (in
3420	>	* which case the action is not applied)
3421	>	* @param action the action
3422	>	*/
3423	>	public <U> void forEachKeySequentially
3424	>	(Function<? super K, ? extends U> transformer,
3425	>	Consumer<? super U> action) {
3426	>	if (transformer == null || action == null)
3427	>	throw new NullPointerException();
3428	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3429	>	U u;
3430	>	while (it.advance() != null) {
3431	>	if ((u = transformer.apply(it.nextKey)) != null)
3432	>	action.accept(u);
3433	>	}
3434	>	ForkJoinTasks.forEachKey
3435	>	(this, transformer, action).invoke();
3436	>	}
3437	>
3438	>	/**
3439	>	* Returns a non-null result from applying the given search
3440	>	* function on each key, or null if none.
3441	>	*
3442	>	* @param searchFunction a function returning a non-null
3443	>	* result on success, else null
3444	>	* @return a non-null result from applying the given search
3445	>	* function on each key, or null if none
3446	>	*/
3447	>	public <U> U searchKeysSequentially
3448	>	(Function<? super K, ? extends U> searchFunction) {
3449	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3450	>	U u;
3451	>	while (it.advance() != null) {
3452	>	if ((u = searchFunction.apply(it.nextKey)) != null)
3453	>	return u;
3454	>	}
3455	>	return null;
3456	>	}
3457	>
3458	>	/**
3459	>	* Returns the result of accumulating all keys using the given
3460	>	* reducer to combine values, or null if none.
3461	>	*
3462	>	* @param reducer a commutative associative combining function
3463	>	* @return the result of accumulating all keys using the given
3464	>	* reducer to combine values, or null if none
3465	>	*/
3466	>	public K reduceKeysSequentially
3467	>	(BiFunction<? super K, ? super K, ? extends K> reducer) {
3468	>	if (reducer == null) throw new NullPointerException();
3469	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3470	>	K r = null;
3471	>	while (it.advance() != null) {
3472	>	K u = it.nextKey;
3473	>	r = (r == null) ? u : reducer.apply(r, u);
3474	>	}
3475	>	return r;
3476	>	}
3477	>
3478	>	/**
3479	>	* Returns the result of accumulating the given transformation
3480	>	* of all keys using the given reducer to combine values, or
3481	>	* null if none.
3482	>	*
3483	>	* @param transformer a function returning the transformation
3484	>	* for an element, or null if there is no transformation (in
3485	>	* which case it is not combined)
3486	>	* @param reducer a commutative associative combining function
3487	>	* @return the result of accumulating the given transformation
3488	>	* of all keys
3489	>	*/
3490	>	public <U> U reduceKeysSequentially
3491	>	(Function<? super K, ? extends U> transformer,
3492	>	BiFunction<? super U, ? super U, ? extends U> reducer) {
3493	>	if (transformer == null || reducer == null)
3494	>	throw new NullPointerException();
3495	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3496	>	U r = null, u;
3497	>	while (it.advance() != null) {
3498	>	if ((u = transformer.apply(it.nextKey)) != null)
3499	>	r = (r == null) ? u : reducer.apply(r, u);
3500	>	}
3501	>	return r;
3502	>	}
3503	>
3504	>	/**
3505	>	* Returns the result of accumulating the given transformation
3506	>	* of all keys using the given reducer to combine values, and
3507	>	* the given basis as an identity value.
3508	>	*
3509	>	* @param transformer a function returning the transformation
3510	>	* for an element
3511	>	* @param basis the identity (initial default value) for the reduction
3512	>	* @param reducer a commutative associative combining function
3513	>	* @return the result of accumulating the given transformation
3514	>	* of all keys
3515	>	*/
3516	>	public double reduceKeysToDoubleSequentially
3517	>	(ToDoubleFunction<? super K> transformer,
3518	>	double basis,
3519	>	DoubleBinaryOperator reducer) {
3520	>	if (transformer == null || reducer == null)
3521	>	throw new NullPointerException();
3522	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3523	>	double r = basis;
3524	>	while (it.advance() != null)
3525	>	r = reducer.applyAsDouble(r, transformer.applyAsDouble(it.nextKey));
3526	>	return r;
3527	>	}
3528	>
3529	>	/**
3530	>	* Returns the result of accumulating the given transformation
3531	>	* of all keys using the given reducer to combine values, and
3532	>	* the given basis as an identity value.
3533	>	*
3534	>	* @param transformer a function returning the transformation
3535	>	* for an element
3536	>	* @param basis the identity (initial default value) for the reduction
3537	>	* @param reducer a commutative associative combining function
3538	>	* @return the result of accumulating the given transformation
3539	>	* of all keys
3540	>	*/
3541	>	public long reduceKeysToLongSequentially
3542	>	(ToLongFunction<? super K> transformer,
3543	>	long basis,
3544	>	LongBinaryOperator reducer) {
3545	>	if (transformer == null || reducer == null)
3546	>	throw new NullPointerException();
3547	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3548	>	long r = basis;
3549	>	while (it.advance() != null)
3550	>	r = reducer.applyAsLong(r, transformer.applyAsLong(it.nextKey));
3551	>	return r;
3552	>	}
3553	>
3554	>	/**
3555	>	* Returns the result of accumulating the given transformation
3556	>	* of all keys using the given reducer to combine values, and
3557	>	* the given basis as an identity value.
3558	>	*
3559	>	* @param transformer a function returning the transformation
3560	>	* for an element
3561	>	* @param basis the identity (initial default value) for the reduction
3562	>	* @param reducer a commutative associative combining function
3563	>	* @return the result of accumulating the given transformation
3564	>	* of all keys
3565	>	*/
3566	>	public int reduceKeysToIntSequentially
3567	>	(ToIntFunction<? super K> transformer,
3568	>	int basis,
3569	>	IntBinaryOperator reducer) {
3570	>	if (transformer == null || reducer == null)
3571	>	throw new NullPointerException();
3572	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3573	>	int r = basis;
3574	>	while (it.advance() != null)
3575	>	r = reducer.applyAsInt(r, transformer.applyAsInt(it.nextKey));
3576	>	return r;
3577	>	}
3578	>
3579	>	/**
3580	>	* Performs the given action for each value.
3581	>	*
3582	>	* @param action the action
3583	>	*/
3584	>	public void forEachValueSequentially(Consumer<? super V> action) {
3585	>	if (action == null) throw new NullPointerException();
3586	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3587	>	V v;
3588	>	while ((v = it.advance()) != null)
3589	>	action.accept(v);
3590	>	}
3591	>
3592	>	/**
3593	>	* Performs the given action for each non-null transformation
3594	>	* of each value.
3595	>	*
3596	>	* @param transformer a function returning the transformation
3597	>	* for an element, or null if there is no transformation (in
3598	>	* which case the action is not applied)
3599	>	* @param action the action
3600	>	*/
3601	>	public <U> void forEachValueSequentially
3602	>	(Function<? super V, ? extends U> transformer,
3603	>	Consumer<? super U> action) {
3604	>	if (transformer == null || action == null)
3605	>	throw new NullPointerException();
3606	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3607	>	V v; U u;
3608	>	while ((v = it.advance()) != null) {
3609	>	if ((u = transformer.apply(v)) != null)
3610	>	action.accept(u);
3611	>	}
3612	>	}
3613	>
3614	>	/**
3615	>	* Returns a non-null result from applying the given search
3616	>	* function on each value, or null if none.
3617	>	*
3618	>	* @param searchFunction a function returning a non-null
3619	>	* result on success, else null
3620	>	* @return a non-null result from applying the given search
3621	>	* function on each value, or null if none
3622	>	*/
3623	>	public <U> U searchValuesSequentially
3624	>	(Function<? super V, ? extends U> searchFunction) {
3625	>	if (searchFunction == null) throw new NullPointerException();
3626	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3627	>	V v; U u;
3628	>	while ((v = it.advance()) != null) {
3629	>	if ((u = searchFunction.apply(v)) != null)
3630	>	return u;
3631	>	}
3632	>	return null;
3633	>	}
3634	>
3635	>	/**
3636	>	* Returns the result of accumulating all values using the
3637	>	* given reducer to combine values, or null if none.
3638	>	*
3639	>	* @param reducer a commutative associative combining function
3640	>	* @return the result of accumulating all values
3641	>	*/
3642	>	public V reduceValuesSequentially
3643	>	(BiFunction<? super V, ? super V, ? extends V> reducer) {
3644	>	if (reducer == null) throw new NullPointerException();
3645	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3646	>	V r = null; V v;
3647	>	while ((v = it.advance()) != null)
3648	>	r = (r == null) ? v : reducer.apply(r, v);
3649	>	return r;
3650	>	}
3651	>
3652	>	/**
3653	>	* Returns the result of accumulating the given transformation
3654	>	* of all values using the given reducer to combine values, or
3655	>	* null if none.
3656	>	*
3657	>	* @param transformer a function returning the transformation
3658	>	* for an element, or null if there is no transformation (in
3659	>	* which case it is not combined)
3660	>	* @param reducer a commutative associative combining function
3661	>	* @return the result of accumulating the given transformation
3662	>	* of all values
3663	>	*/
3664	>	public <U> U reduceValuesSequentially
3665	>	(Function<? super V, ? extends U> transformer,
3666	>	BiFunction<? super U, ? super U, ? extends U> reducer) {
3667	>	if (transformer == null || reducer == null)
3668	>	throw new NullPointerException();
3669	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3670	>	U r = null, u; V v;
3671	>	while ((v = it.advance()) != null) {
3672	>	if ((u = transformer.apply(v)) != null)
3673	>	r = (r == null) ? u : reducer.apply(r, u);
3674	>	}
3675	>	return r;
3676	>	}
3677	>
3678	>	/**
3679	>	* Returns the result of accumulating the given transformation
3680	>	* of all values using the given reducer to combine values,
3681	>	* and the given basis as an identity value.
3682	>	*
3683	>	* @param transformer a function returning the transformation
3684	>	* for an element
3685	>	* @param basis the identity (initial default value) for the reduction
3686	>	* @param reducer a commutative associative combining function
3687	>	* @return the result of accumulating the given transformation
3688	>	* of all values
3689	>	*/
3690	>	public double reduceValuesToDoubleSequentially
3691	>	(ToDoubleFunction<? super V> transformer,
3692	>	double basis,
3693	>	DoubleBinaryOperator reducer) {
3694	>	if (transformer == null || reducer == null)
3695	>	throw new NullPointerException();
3696	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3697	>	double r = basis; V v;
3698	>	while ((v = it.advance()) != null)
3699	>	r = reducer.applyAsDouble(r, transformer.applyAsDouble(v));
3700	>	return r;
3701	>	}
3702	>
3703	>	/**
3704	>	* Returns the result of accumulating the given transformation
3705	>	* of all values using the given reducer to combine values,
3706	>	* and the given basis as an identity value.
3707	>	*
3708	>	* @param transformer a function returning the transformation
3709	>	* for an element
3710	>	* @param basis the identity (initial default value) for the reduction
3711	>	* @param reducer a commutative associative combining function
3712	>	* @return the result of accumulating the given transformation
3713	>	* of all values
3714	>	*/
3715	>	public long reduceValuesToLongSequentially
3716	>	(ToLongFunction<? super V> transformer,
3717	>	long basis,
3718	>	LongBinaryOperator reducer) {
3719	>	if (transformer == null || reducer == null)
3720	>	throw new NullPointerException();
3721	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3722	>	long r = basis; V v;
3723	>	while ((v = it.advance()) != null)
3724	>	r = reducer.applyAsLong(r, transformer.applyAsLong(v));
3725	>	return r;
3726	>	}
3727	>
3728	>	/**
3729	>	* Returns the result of accumulating the given transformation
3730	>	* of all values using the given reducer to combine values,
3731	>	* and the given basis as an identity value.
3732	>	*
3733	>	* @param transformer a function returning the transformation
3734	>	* for an element
3735	>	* @param basis the identity (initial default value) for the reduction
3736	>	* @param reducer a commutative associative combining function
3737	>	* @return the result of accumulating the given transformation
3738	>	* of all values
3739	>	*/
3740	>	public int reduceValuesToIntSequentially
3741	>	(ToIntFunction<? super V> transformer,
3742	>	int basis,
3743	>	IntBinaryOperator reducer) {
3744	>	if (transformer == null || reducer == null)
3745	>	throw new NullPointerException();
3746	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3747	>	int r = basis; V v;
3748	>	while ((v = it.advance()) != null)
3749	>	r = reducer.applyAsInt(r, transformer.applyAsInt(v));
3750	>	return r;
3751	>	}
3752	>
3753	>	/**
3754	>	* Performs the given action for each entry.
3755	>	*
3756	>	* @param action the action
3757	>	*/
3758	>	public void forEachEntrySequentially
3759	>	(Consumer<? super Map.Entry<K,V>> action) {
3760	>	if (action == null) throw new NullPointerException();
3761	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3762	>	V v;
3763	>	while ((v = it.advance()) != null)
3764	>	action.accept(entryFor(it.nextKey, v));
3765	>	}
3766	>
3767	>	/**
3768	>	* Performs the given action for each non-null transformation
3769	>	* of each entry.
3770	>	*
3771	>	* @param transformer a function returning the transformation
3772	>	* for an element, or null if there is no transformation (in
3773	>	* which case the action is not applied)
3774	>	* @param action the action
3775	>	*/
3776	>	public <U> void forEachEntrySequentially
3777	>	(Function<Map.Entry<K,V>, ? extends U> transformer,
3778	>	Consumer<? super U> action) {
3779	>	if (transformer == null || action == null)
3780	>	throw new NullPointerException();
3781	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3782	>	V v; U u;
3783	>	while ((v = it.advance()) != null) {
3784	>	if ((u = transformer.apply(entryFor(it.nextKey, v))) != null)
3785	>	action.accept(u);
3786	>	}
3787	>	}
3788	>
3789	>	/**
3790	>	* Returns a non-null result from applying the given search
3791	>	* function on each entry, or null if none.
3792	>	*
3793	>	* @param searchFunction a function returning a non-null
3794	>	* result on success, else null
3795	>	* @return a non-null result from applying the given search
3796	>	* function on each entry, or null if none
3797	>	*/
3798	>	public <U> U searchEntriesSequentially
3799	>	(Function<Map.Entry<K,V>, ? extends U> searchFunction) {
3800	>	if (searchFunction == null) throw new NullPointerException();
3801	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3802	>	V v; U u;
3803	>	while ((v = it.advance()) != null) {
3804	>	if ((u = searchFunction.apply(entryFor(it.nextKey, v))) != null)
3805	>	return u;
3806	>	}
3807	>	return null;
3808	>	}
3809	>
3810	>	/**
3811	>	* Returns the result of accumulating all entries using the
3812	>	* given reducer to combine values, or null if none.
3813	>	*
3814	>	* @param reducer a commutative associative combining function
3815	>	* @return the result of accumulating all entries
3816	>	*/
3817	>	public Map.Entry<K,V> reduceEntriesSequentially
3818	>	(BiFunction<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
3819	>	if (reducer == null) throw new NullPointerException();
3820	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3821	>	Map.Entry<K,V> r = null; V v;
3822	>	while ((v = it.advance()) != null) {
3823	>	Map.Entry<K,V> u = entryFor(it.nextKey, v);
3824	>	r = (r == null) ? u : reducer.apply(r, u);
3825	>	}
3826	>	return r;
3827	>	}
3828	>
3829	>	/**
3830	>	* Returns the result of accumulating the given transformation
3831	>	* of all entries using the given reducer to combine values,
3832	>	* or null if none.
3833	>	*
3834	>	* @param transformer a function returning the transformation
3835	>	* for an element, or null if there is no transformation (in
3836	>	* which case it is not combined)
3837	>	* @param reducer a commutative associative combining function
3838	>	* @return the result of accumulating the given transformation
3839	>	* of all entries
3840	>	*/
3841	>	public <U> U reduceEntriesSequentially
3842	>	(Function<Map.Entry<K,V>, ? extends U> transformer,
3843	>	BiFunction<? super U, ? super U, ? extends U> reducer) {
3844	>	if (transformer == null || reducer == null)
3845	>	throw new NullPointerException();
3846	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3847	>	U r = null, u; V v;
3848	>	while ((v = it.advance()) != null) {
3849	>	if ((u = transformer.apply(entryFor(it.nextKey, v))) != null)
3850	>	r = (r == null) ? u : reducer.apply(r, u);
3851	>	}
3852	>	return r;
3853	>	}
3854	>
3855	>	/**
3856	>	* Returns the result of accumulating the given transformation
3857	>	* of all entries using the given reducer to combine values,
3858	>	* and the given basis as an identity value.
3859	>	*
3860	>	* @param transformer a function returning the transformation
3861	>	* for an element
3862	>	* @param basis the identity (initial default value) for the reduction
3863	>	* @param reducer a commutative associative combining function
3864	>	* @return the result of accumulating the given transformation
3865	>	* of all entries
3866	>	*/
3867	>	public double reduceEntriesToDoubleSequentially
3868	>	(ToDoubleFunction<Map.Entry<K,V>> transformer,
3869	>	double basis,
3870	>	DoubleBinaryOperator reducer) {
3871	>	if (transformer == null || reducer == null)
3872	>	throw new NullPointerException();
3873	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3874	>	double r = basis; V v;
3875	>	while ((v = it.advance()) != null)
3876	>	r = reducer.applyAsDouble(r, transformer.applyAsDouble(entryFor(it.nextKey, v)));
3877	>	return r;
3878	>	}
3879	>
3880	>	/**
3881	>	* Returns the result of accumulating the given transformation
3882	>	* of all entries using the given reducer to combine values,
3883	>	* and the given basis as an identity value.
3884	>	*
3885	>	* @param transformer a function returning the transformation
3886	>	* for an element
3887	>	* @param basis the identity (initial default value) for the reduction
3888	>	* @param reducer a commutative associative combining function
3889	>	* @return the result of accumulating the given transformation
3890	>	* of all entries
3891	>	*/
3892	>	public long reduceEntriesToLongSequentially
3893	>	(ToLongFunction<Map.Entry<K,V>> transformer,
3894	>	long basis,
3895	>	LongBinaryOperator reducer) {
3896	>	if (transformer == null || reducer == null)
3897	>	throw new NullPointerException();
3898	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3899	>	long r = basis; V v;
3900	>	while ((v = it.advance()) != null)
3901	>	r = reducer.applyAsLong(r, transformer.applyAsLong(entryFor(it.nextKey, v)));
3902	>	return r;
3903	>	}
3904	>
3905	>	/**
3906	>	* Returns the result of accumulating the given transformation
3907	>	* of all entries using the given reducer to combine values,
3908	>	* and the given basis as an identity value.
3909	>	*
3910	>	* @param transformer a function returning the transformation
3911	>	* for an element
3912	>	* @param basis the identity (initial default value) for the reduction
3913	>	* @param reducer a commutative associative combining function
3914	>	* @return the result of accumulating the given transformation
3915	>	* of all entries
3916	>	*/
3917	>	public int reduceEntriesToIntSequentially
3918	>	(ToIntFunction<Map.Entry<K,V>> transformer,
3919	>	int basis,
3920	>	IntBinaryOperator reducer) {
3921	>	if (transformer == null || reducer == null)
3922	>	throw new NullPointerException();
3923	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3924	>	int r = basis; V v;
3925	>	while ((v = it.advance()) != null)
3926	>	r = reducer.applyAsInt(r, transformer.applyAsInt(entryFor(it.nextKey, v)));
3927	>	return r;
3928	>	}
3929	>
3930	>	// Parallel bulk operations
3931
3932		/**
3933		* Performs the given action for each (key, value).
3934		*
3935		* @param action the action
3936		*/
3937	<	public void forEach(BiAction<K,V> action) {
3937	>	public void forEachInParallel(BiConsumer<? super K,? super V> action) {
3938		ForkJoinTasks.forEach
3939		(this, action).invoke();
3940		}
#	Line 3464 | Line 3944 | public class ConcurrentHashMap<K, V>
3944		* of each (key, value).
3945		*
3946		* @param transformer a function returning the transformation
3947	<	* for an element, or null of there is no transformation (in
3948	<	* which case the action is not applied).
3947	>	* for an element, or null if there is no transformation (in
3948	>	* which case the action is not applied)
3949		* @param action the action
3950		*/
3951	<	public <U> void forEach(BiFun<? super K, ? super V, ? extends U> transformer,
3952	<	Action<U> action) {
3951	>	public <U> void forEachInParallel
3952	>	(BiFunction<? super K, ? super V, ? extends U> transformer,
3953	>	Consumer<? super U> action) {
3954		ForkJoinTasks.forEach
3955		(this, transformer, action).invoke();
3956		}
#	Line 3486 | Line 3967 | public class ConcurrentHashMap<K, V>
3967		* @return a non-null result from applying the given search
3968		* function on each (key, value), or null if none
3969		*/
3970	<	public <U> U search(BiFun<? super K, ? super V, ? extends U> searchFunction) {
3970	>	public <U> U searchInParallel
3971	>	(BiFunction<? super K, ? super V, ? extends U> searchFunction) {
3972		return ForkJoinTasks.search
3973		(this, searchFunction).invoke();
3974		}
#	Line 3497 | Line 3979 | public class ConcurrentHashMap<K, V>
3979		* combine values, or null if none.
3980		*
3981		* @param transformer a function returning the transformation
3982	<	* for an element, or null of there is no transformation (in
3983	<	* which case it is not combined).
3982	>	* for an element, or null if there is no transformation (in
3983	>	* which case it is not combined)
3984		* @param reducer a commutative associative combining function
3985		* @return the result of accumulating the given transformation
3986		* of all (key, value) pairs
3987		*/
3988	<	public <U> U reduce(BiFun<? super K, ? super V, ? extends U> transformer,
3989	<	BiFun<? super U, ? super U, ? extends U> reducer) {
3988	>	public <U> U reduceInParallel
3989	>	(BiFunction<? super K, ? super V, ? extends U> transformer,
3990	>	BiFunction<? super U, ? super U, ? extends U> reducer) {
3991		return ForkJoinTasks.reduce
3992		(this, transformer, reducer).invoke();
3993		}
#	Line 3521 | Line 4004 | public class ConcurrentHashMap<K, V>
4004		* @return the result of accumulating the given transformation
4005		* of all (key, value) pairs
4006		*/
4007	<	public double reduceToDouble(ObjectByObjectToDouble<? super K, ? super V> transformer,
4008	<	double basis,
4009	<	DoubleByDoubleToDouble reducer) {
4007	>	public double reduceToDoubleInParallel
4008	>	(ToDoubleBiFunction<? super K, ? super V> transformer,
4009	>	double basis,
4010	>	DoubleBinaryOperator reducer) {
4011		return ForkJoinTasks.reduceToDouble
4012		(this, transformer, basis, reducer).invoke();
4013		}
#	Line 3540 | Line 4024 | public class ConcurrentHashMap<K, V>
4024		* @return the result of accumulating the given transformation
4025		* of all (key, value) pairs
4026		*/
4027	<	public long reduceToLong(ObjectByObjectToLong<? super K, ? super V> transformer,
4028	<	long basis,
4029	<	LongByLongToLong reducer) {
4027	>	public long reduceToLongInParallel
4028	>	(ToLongBiFunction<? super K, ? super V> transformer,
4029	>	long basis,
4030	>	LongBinaryOperator reducer) {
4031		return ForkJoinTasks.reduceToLong
4032		(this, transformer, basis, reducer).invoke();
4033		}
#	Line 3559 | Line 4044 | public class ConcurrentHashMap<K, V>
4044		* @return the result of accumulating the given transformation
4045		* of all (key, value) pairs
4046		*/
4047	<	public int reduceToInt(ObjectByObjectToInt<? super K, ? super V> transformer,
4048	<	int basis,
4049	<	IntByIntToInt reducer) {
4047	>	public int reduceToIntInParallel
4048	>	(ToIntBiFunction<? super K, ? super V> transformer,
4049	>	int basis,
4050	>	IntBinaryOperator reducer) {
4051		return ForkJoinTasks.reduceToInt
4052		(this, transformer, basis, reducer).invoke();
4053		}
#	Line 3571 | Line 4057 | public class ConcurrentHashMap<K, V>
4057		*
4058		* @param action the action
4059		*/
4060	<	public void forEachKey(Action<K> action) {
4060	>	public void forEachKeyInParallel(Consumer<? super K> action) {
4061		ForkJoinTasks.forEachKey
4062		(this, action).invoke();
4063		}
#	Line 3581 | Line 4067 | public class ConcurrentHashMap<K, V>
4067		* of each key.
4068		*
4069		* @param transformer a function returning the transformation
4070	<	* for an element, or null of there is no transformation (in
4071	<	* which case the action is not applied).
4070	>	* for an element, or null if there is no transformation (in
4071	>	* which case the action is not applied)
4072		* @param action the action
4073		*/
4074	<	public <U> void forEachKey(Fun<? super K, ? extends U> transformer,
4075	<	Action<U> action) {
4074	>	public <U> void forEachKeyInParallel
4075	>	(Function<? super K, ? extends U> transformer,
4076	>	Consumer<? super U> action) {
4077		ForkJoinTasks.forEachKey
4078		(this, transformer, action).invoke();
4079		}
#	Line 3603 | Line 4090 | public class ConcurrentHashMap<K, V>
4090		* @return a non-null result from applying the given search
4091		* function on each key, or null if none
4092		*/
4093	<	public <U> U searchKeys(Fun<? super K, ? extends U> searchFunction) {
4093	>	public <U> U searchKeysInParallel
4094	>	(Function<? super K, ? extends U> searchFunction) {
4095		return ForkJoinTasks.searchKeys
4096		(this, searchFunction).invoke();
4097		}
#	Line 3616 | Line 4104 | public class ConcurrentHashMap<K, V>
4104		* @return the result of accumulating all keys using the given
4105		* reducer to combine values, or null if none
4106		*/
4107	<	public K reduceKeys(BiFun<? super K, ? super K, ? extends K> reducer) {
4107	>	public K reduceKeysInParallel
4108	>	(BiFunction<? super K, ? super K, ? extends K> reducer) {
4109		return ForkJoinTasks.reduceKeys
4110		(this, reducer).invoke();
4111		}
#	Line 3627 | Line 4116 | public class ConcurrentHashMap<K, V>
4116		* null if none.
4117		*
4118		* @param transformer a function returning the transformation
4119	<	* for an element, or null of there is no transformation (in
4120	<	* which case it is not combined).
4119	>	* for an element, or null if there is no transformation (in
4120	>	* which case it is not combined)
4121		* @param reducer a commutative associative combining function
4122		* @return the result of accumulating the given transformation
4123		* of all keys
4124		*/
4125	<	public <U> U reduceKeys(Fun<? super K, ? extends U> transformer,
4126	<	BiFun<? super U, ? super U, ? extends U> reducer) {
4125	>	public <U> U reduceKeysInParallel
4126	>	(Function<? super K, ? extends U> transformer,
4127	>	BiFunction<? super U, ? super U, ? extends U> reducer) {
4128		return ForkJoinTasks.reduceKeys
4129		(this, transformer, reducer).invoke();
4130		}
#	Line 3648 | Line 4138 | public class ConcurrentHashMap<K, V>
4138		* for an element
4139		* @param basis the identity (initial default value) for the reduction
4140		* @param reducer a commutative associative combining function
4141	<	* @return  the result of accumulating the given transformation
4141	>	* @return the result of accumulating the given transformation
4142		* of all keys
4143		*/
4144	<	public double reduceKeysToDouble(ObjectToDouble<? super K> transformer,
4145	<	double basis,
4146	<	DoubleByDoubleToDouble reducer) {
4144	>	public double reduceKeysToDoubleInParallel
4145	>	(ToDoubleFunction<? super K> transformer,
4146	>	double basis,
4147	>	DoubleBinaryOperator reducer) {
4148		return ForkJoinTasks.reduceKeysToDouble
4149		(this, transformer, basis, reducer).invoke();
4150		}
#	Line 3670 | Line 4161 | public class ConcurrentHashMap<K, V>
4161		* @return the result of accumulating the given transformation
4162		* of all keys
4163		*/
4164	<	public long reduceKeysToLong(ObjectToLong<? super K> transformer,
4165	<	long basis,
4166	<	LongByLongToLong reducer) {
4164	>	public long reduceKeysToLongInParallel
4165	>	(ToLongFunction<? super K> transformer,
4166	>	long basis,
4167	>	LongBinaryOperator reducer) {
4168		return ForkJoinTasks.reduceKeysToLong
4169		(this, transformer, basis, reducer).invoke();
4170		}
#	Line 3689 | Line 4181 | public class ConcurrentHashMap<K, V>
4181		* @return the result of accumulating the given transformation
4182		* of all keys
4183		*/
4184	<	public int reduceKeysToInt(ObjectToInt<? super K> transformer,
4185	<	int basis,
4186	<	IntByIntToInt reducer) {
4184	>	public int reduceKeysToIntInParallel
4185	>	(ToIntFunction<? super K> transformer,
4186	>	int basis,
4187	>	IntBinaryOperator reducer) {
4188		return ForkJoinTasks.reduceKeysToInt
4189		(this, transformer, basis, reducer).invoke();
4190		}
#	Line 3701 | Line 4194 | public class ConcurrentHashMap<K, V>
4194		*
4195		* @param action the action
4196		*/
4197	<	public void forEachValue(Action<V> action) {
4197	>	public void forEachValueInParallel(Consumer<? super V> action) {
4198		ForkJoinTasks.forEachValue
4199		(this, action).invoke();
4200		}
#	Line 3711 | Line 4204 | public class ConcurrentHashMap<K, V>
4204		* of each value.
4205		*
4206		* @param transformer a function returning the transformation
4207	<	* for an element, or null of there is no transformation (in
4208	<	* which case the action is not applied).
4207	>	* for an element, or null if there is no transformation (in
4208	>	* which case the action is not applied)
4209	>	* @param action the action
4210		*/
4211	<	public <U> void forEachValue(Fun<? super V, ? extends U> transformer,
4212	<	Action<U> action) {
4211	>	public <U> void forEachValueInParallel
4212	>	(Function<? super V, ? extends U> transformer,
4213	>	Consumer<? super U> action) {
4214		ForkJoinTasks.forEachValue
4215		(this, transformer, action).invoke();
4216		}
#	Line 3731 | Line 4226 | public class ConcurrentHashMap<K, V>
4226		* result on success, else null
4227		* @return a non-null result from applying the given search
4228		* function on each value, or null if none
3734	–	*
4229		*/
4230	<	public <U> U searchValues(Fun<? super V, ? extends U> searchFunction) {
4230	>	public <U> U searchValuesInParallel
4231	>	(Function<? super V, ? extends U> searchFunction) {
4232		return ForkJoinTasks.searchValues
4233		(this, searchFunction).invoke();
4234		}
#	Line 3743 | Line 4238 | public class ConcurrentHashMap<K, V>
4238		* given reducer to combine values, or null if none.
4239		*
4240		* @param reducer a commutative associative combining function
4241	<	* @return  the result of accumulating all values
4241	>	* @return the result of accumulating all values
4242		*/
4243	<	public V reduceValues(BiFun<? super V, ? super V, ? extends V> reducer) {
4243	>	public V reduceValuesInParallel
4244	>	(BiFunction<? super V, ? super V, ? extends V> reducer) {
4245		return ForkJoinTasks.reduceValues
4246		(this, reducer).invoke();
4247		}
#	Line 3756 | Line 4252 | public class ConcurrentHashMap<K, V>
4252		* null if none.
4253		*
4254		* @param transformer a function returning the transformation
4255	<	* for an element, or null of there is no transformation (in
4256	<	* which case it is not combined).
4255	>	* for an element, or null if there is no transformation (in
4256	>	* which case it is not combined)
4257		* @param reducer a commutative associative combining function
4258		* @return the result of accumulating the given transformation
4259		* of all values
4260		*/
4261	<	public <U> U reduceValues(Fun<? super V, ? extends U> transformer,
4262	<	BiFun<? super U, ? super U, ? extends U> reducer) {
4261	>	public <U> U reduceValuesInParallel
4262	>	(Function<? super V, ? extends U> transformer,
4263	>	BiFunction<? super U, ? super U, ? extends U> reducer) {
4264		return ForkJoinTasks.reduceValues
4265		(this, transformer, reducer).invoke();
4266		}
#	Line 3780 | Line 4277 | public class ConcurrentHashMap<K, V>
4277		* @return the result of accumulating the given transformation
4278		* of all values
4279		*/
4280	<	public double reduceValuesToDouble(ObjectToDouble<? super V> transformer,
4281	<	double basis,
4282	<	DoubleByDoubleToDouble reducer) {
4280	>	public double reduceValuesToDoubleInParallel
4281	>	(ToDoubleFunction<? super V> transformer,
4282	>	double basis,
4283	>	DoubleBinaryOperator reducer) {
4284		return ForkJoinTasks.reduceValuesToDouble
4285		(this, transformer, basis, reducer).invoke();
4286		}
#	Line 3799 | Line 4297 | public class ConcurrentHashMap<K, V>
4297		* @return the result of accumulating the given transformation
4298		* of all values
4299		*/
4300	<	public long reduceValuesToLong(ObjectToLong<? super V> transformer,
4301	<	long basis,
4302	<	LongByLongToLong reducer) {
4300	>	public long reduceValuesToLongInParallel
4301	>	(ToLongFunction<? super V> transformer,
4302	>	long basis,
4303	>	LongBinaryOperator reducer) {
4304		return ForkJoinTasks.reduceValuesToLong
4305		(this, transformer, basis, reducer).invoke();
4306		}
#	Line 3818 | Line 4317 | public class ConcurrentHashMap<K, V>
4317		* @return the result of accumulating the given transformation
4318		* of all values
4319		*/
4320	<	public int reduceValuesToInt(ObjectToInt<? super V> transformer,
4321	<	int basis,
4322	<	IntByIntToInt reducer) {
4320	>	public int reduceValuesToIntInParallel
4321	>	(ToIntFunction<? super V> transformer,
4322	>	int basis,
4323	>	IntBinaryOperator reducer) {
4324		return ForkJoinTasks.reduceValuesToInt
4325		(this, transformer, basis, reducer).invoke();
4326		}
#	Line 3830 | Line 4330 | public class ConcurrentHashMap<K, V>
4330		*
4331		* @param action the action
4332		*/
4333	<	public void forEachEntry(Action<Map.Entry<K,V>> action) {
4333	>	public void forEachEntryInParallel(Consumer<? super Map.Entry<K,V>> action) {
4334		ForkJoinTasks.forEachEntry
4335		(this, action).invoke();
4336		}
#	Line 3840 | Line 4340 | public class ConcurrentHashMap<K, V>
4340		* of each entry.
4341		*
4342		* @param transformer a function returning the transformation
4343	<	* for an element, or null of there is no transformation (in
4344	<	* which case the action is not applied).
4343	>	* for an element, or null if there is no transformation (in
4344	>	* which case the action is not applied)
4345		* @param action the action
4346		*/
4347	<	public <U> void forEachEntry(Fun<Map.Entry<K,V>, ? extends U> transformer,
4348	<	Action<U> action) {
4347	>	public <U> void forEachEntryInParallel
4348	>	(Function<Map.Entry<K,V>, ? extends U> transformer,
4349	>	Consumer<? super U> action) {
4350		ForkJoinTasks.forEachEntry
4351		(this, transformer, action).invoke();
4352		}
#	Line 3862 | Line 4363 | public class ConcurrentHashMap<K, V>
4363		* @return a non-null result from applying the given search
4364		* function on each entry, or null if none
4365		*/
4366	<	public <U> U searchEntries(Fun<Map.Entry<K,V>, ? extends U> searchFunction) {
4366	>	public <U> U searchEntriesInParallel
4367	>	(Function<Map.Entry<K,V>, ? extends U> searchFunction) {
4368		return ForkJoinTasks.searchEntries
4369		(this, searchFunction).invoke();
4370		}
#	Line 3874 | Line 4376 | public class ConcurrentHashMap<K, V>
4376		* @param reducer a commutative associative combining function
4377		* @return the result of accumulating all entries
4378		*/
4379	<	public Map.Entry<K,V> reduceEntries(BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
4379	>	public Map.Entry<K,V> reduceEntriesInParallel
4380	>	(BiFunction<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
4381		return ForkJoinTasks.reduceEntries
4382		(this, reducer).invoke();
4383		}
#	Line 3885 | Line 4388 | public class ConcurrentHashMap<K, V>
4388		* or null if none.
4389		*
4390		* @param transformer a function returning the transformation
4391	<	* for an element, or null of there is no transformation (in
4392	<	* which case it is not combined).
4391	>	* for an element, or null if there is no transformation (in
4392	>	* which case it is not combined)
4393		* @param reducer a commutative associative combining function
4394		* @return the result of accumulating the given transformation
4395		* of all entries
4396		*/
4397	<	public <U> U reduceEntries(Fun<Map.Entry<K,V>, ? extends U> transformer,
4398	<	BiFun<? super U, ? super U, ? extends U> reducer) {
4397	>	public <U> U reduceEntriesInParallel
4398	>	(Function<Map.Entry<K,V>, ? extends U> transformer,
4399	>	BiFunction<? super U, ? super U, ? extends U> reducer) {
4400		return ForkJoinTasks.reduceEntries
4401		(this, transformer, reducer).invoke();
4402		}
#	Line 3909 | Line 4413 | public class ConcurrentHashMap<K, V>
4413		* @return the result of accumulating the given transformation
4414		* of all entries
4415		*/
4416	<	public double reduceEntriesToDouble(ObjectToDouble<Map.Entry<K,V>> transformer,
4417	<	double basis,
4418	<	DoubleByDoubleToDouble reducer) {
4416	>	public double reduceEntriesToDoubleInParallel
4417	>	(ToDoubleFunction<Map.Entry<K,V>> transformer,
4418	>	double basis,
4419	>	DoubleBinaryOperator reducer) {
4420		return ForkJoinTasks.reduceEntriesToDouble
4421		(this, transformer, basis, reducer).invoke();
4422		}
#	Line 3925 | Line 4430 | public class ConcurrentHashMap<K, V>
4430		* for an element
4431		* @param basis the identity (initial default value) for the reduction
4432		* @param reducer a commutative associative combining function
4433	<	* @return  the result of accumulating the given transformation
4433	>	* @return the result of accumulating the given transformation
4434		* of all entries
4435		*/
4436	<	public long reduceEntriesToLong(ObjectToLong<Map.Entry<K,V>> transformer,
4437	<	long basis,
4438	<	LongByLongToLong reducer) {
4436	>	public long reduceEntriesToLongInParallel
4437	>	(ToLongFunction<Map.Entry<K,V>> transformer,
4438	>	long basis,
4439	>	LongBinaryOperator reducer) {
4440		return ForkJoinTasks.reduceEntriesToLong
4441		(this, transformer, basis, reducer).invoke();
4442		}
#	Line 3947 | Line 4453 | public class ConcurrentHashMap<K, V>
4453		* @return the result of accumulating the given transformation
4454		* of all entries
4455		*/
4456	<	public int reduceEntriesToInt(ObjectToInt<Map.Entry<K,V>> transformer,
4457	<	int basis,
4458	<	IntByIntToInt reducer) {
4456	>	public int reduceEntriesToIntInParallel
4457	>	(ToIntFunction<Map.Entry<K,V>> transformer,
4458	>	int basis,
4459	>	IntBinaryOperator reducer) {
4460		return ForkJoinTasks.reduceEntriesToInt
4461		(this, transformer, basis, reducer).invoke();
4462		}
4463
4464	+
4465		/* ----------------Views -------------- */
4466
4467		/**
4468		* Base class for views.
4469		*/
4470	<	static abstract class CHMView<K, V> {
4471	<	final ConcurrentHashMap<K, V> map;
4472	<	CHMView(ConcurrentHashMap<K, V> map)  { this.map = map; }
4470	>	abstract static class CHMCollectionView<K,V,E>
4471	>	implements Collection<E>, java.io.Serializable {
4472	>	private static final long serialVersionUID = 7249069246763182397L;
4473	>	final ConcurrentHashMap<K,V> map;
4474	>	CHMCollectionView(ConcurrentHashMap<K,V> map)  { this.map = map; }
4475
4476		/**
4477		* Returns the map backing this view.
#	Line 3970 | Line 4480 | public class ConcurrentHashMap<K, V>
4480		*/
4481		public ConcurrentHashMap<K,V> getMap() { return map; }
4482
4483	<	public final int size()                 { return map.size(); }
4484	<	public final boolean isEmpty()          { return map.isEmpty(); }
4485	<	public final void clear()               { map.clear(); }
4483	>	/**
4484	>	* Removes all of the elements from this view, by removing all
4485	>	* the mappings from the map backing this view.
4486	>	*/
4487	>	public final void clear()      { map.clear(); }
4488	>	public final int size()        { return map.size(); }
4489	>	public final boolean isEmpty() { return map.isEmpty(); }
4490
4491		// implementations below rely on concrete classes supplying these
4492	<	abstract public Iterator<?> iterator();
4493	<	abstract public boolean contains(Object o);
4494	<	abstract public boolean remove(Object o);
4492	>	// abstract methods
4493	>	/**
4494	>	* Returns a "weakly consistent" iterator that will never
4495	>	* throw {@link ConcurrentModificationException}, and
4496	>	* guarantees to traverse elements as they existed upon
4497	>	* construction of the iterator, and may (but is not
4498	>	* guaranteed to) reflect any modifications subsequent to
4499	>	* construction.
4500	>	*/
4501	>	public abstract Iterator<E> iterator();
4502	>	public abstract boolean contains(Object o);
4503	>	public abstract boolean remove(Object o);
4504
4505		private static final String oomeMsg = "Required array size too large";
4506
4507		public final Object[] toArray() {
4508		long sz = map.mappingCount();
4509	<	if (sz > (long)(MAX_ARRAY_SIZE))
4509	>	if (sz > MAX_ARRAY_SIZE)
4510		throw new OutOfMemoryError(oomeMsg);
4511		int n = (int)sz;
4512		Object[] r = new Object[n];
4513		int i = 0;
4514	<	Iterator<?> it = iterator();
3992	<	while (it.hasNext()) {
4514	>	for (E e : this) {
4515		if (i == n) {
4516		if (n >= MAX_ARRAY_SIZE)
4517		throw new OutOfMemoryError(oomeMsg);
#	Line 3999 | Line 4521 | public class ConcurrentHashMap<K, V>
4521		n += (n >>> 1) + 1;
4522		r = Arrays.copyOf(r, n);
4523		}
4524	<	r[i++] = it.next();
4524	>	r[i++] = e;
4525		}
4526		return (i == n) ? r : Arrays.copyOf(r, i);
4527		}
4528
4529	<	@SuppressWarnings("unchecked") public final <T> T[] toArray(T[] a) {
4529	>	@SuppressWarnings("unchecked")
4530	>	public final <T> T[] toArray(T[] a) {
4531		long sz = map.mappingCount();
4532	<	if (sz > (long)(MAX_ARRAY_SIZE))
4532	>	if (sz > MAX_ARRAY_SIZE)
4533		throw new OutOfMemoryError(oomeMsg);
4534		int m = (int)sz;
4535		T[] r = (a.length >= m) ? a :
#	Line 4014 | Line 4537 | public class ConcurrentHashMap<K, V>
4537		.newInstance(a.getClass().getComponentType(), m);
4538		int n = r.length;
4539		int i = 0;
4540	<	Iterator<?> it = iterator();
4018	<	while (it.hasNext()) {
4540	>	for (E e : this) {
4541		if (i == n) {
4542		if (n >= MAX_ARRAY_SIZE)
4543		throw new OutOfMemoryError(oomeMsg);
#	Line 4025 | Line 4547 | public class ConcurrentHashMap<K, V>
4547		n += (n >>> 1) + 1;
4548		r = Arrays.copyOf(r, n);
4549		}
4550	<	r[i++] = (T)it.next();
4550	>	r[i++] = (T)e;
4551		}
4552		if (a == r && i < n) {
4553		r[i] = null; // null-terminate
#	Line 4034 | Line 4556 | public class ConcurrentHashMap<K, V>
4556		return (i == n) ? r : Arrays.copyOf(r, i);
4557		}
4558
4559	<	public final int hashCode() {
4560	<	int h = 0;
4561	<	for (Iterator<?> it = iterator(); it.hasNext();)
4562	<	h += it.next().hashCode();
4563	<	return h;
4564	<	}
4565	<
4559	>	/**
4560	>	* Returns a string representation of this collection.
4561	>	* The string representation consists of the string representations
4562	>	* of the collection's elements in the order they are returned by
4563	>	* its iterator, enclosed in square brackets ({@code "[]"}).
4564	>	* Adjacent elements are separated by the characters {@code ", "}
4565	>	* (comma and space).  Elements are converted to strings as by
4566	>	* {@link String#valueOf(Object)}.
4567	>	*
4568	>	* @return a string representation of this collection
4569	>	*/
4570		public final String toString() {
4571		StringBuilder sb = new StringBuilder();
4572		sb.append('[');
4573	<	Iterator<?> it = iterator();
4573	>	Iterator<E> it = iterator();
4574		if (it.hasNext()) {
4575		for (;;) {
4576		Object e = it.next();
#	Line 4059 | Line 4585 | public class ConcurrentHashMap<K, V>
4585
4586		public final boolean containsAll(Collection<?> c) {
4587		if (c != this) {
4588	<	for (Iterator<?> it = c.iterator(); it.hasNext();) {
4063	<	Object e = it.next();
4588	>	for (Object e : c) {
4589		if (e == null || !contains(e))
4590		return false;
4591		}
#	Line 4070 | Line 4595 | public class ConcurrentHashMap<K, V>
4595
4596		public final boolean removeAll(Collection<?> c) {
4597		boolean modified = false;
4598	<	for (Iterator<?> it = iterator(); it.hasNext();) {
4598	>	for (Iterator<E> it = iterator(); it.hasNext();) {
4599		if (c.contains(it.next())) {
4600		it.remove();
4601		modified = true;
#	Line 4081 | Line 4606 | public class ConcurrentHashMap<K, V>
4606
4607		public final boolean retainAll(Collection<?> c) {
4608		boolean modified = false;
4609	<	for (Iterator<?> it = iterator(); it.hasNext();) {
4609	>	for (Iterator<E> it = iterator(); it.hasNext();) {
4610		if (!c.contains(it.next())) {
4611		it.remove();
4612		modified = true;
#	Line 4092 | Line 4617 | public class ConcurrentHashMap<K, V>
4617
4618		}
4619
4620	+	abstract static class CHMSetView<K,V,E>
4621	+	extends CHMCollectionView<K,V,E>
4622	+	implements Set<E>, java.io.Serializable {
4623	+	private static final long serialVersionUID = 7249069246763182397L;
4624	+	CHMSetView(ConcurrentHashMap<K,V> map) { super(map); }
4625	+
4626	+	// Implement Set API
4627	+
4628	+	/**
4629	+	* Implements {@link Set#hashCode()}.
4630	+	* @return the hash code value for this set
4631	+	*/
4632	+	public final int hashCode() {
4633	+	int h = 0;
4634	+	for (E e : this)
4635	+	h += e.hashCode();
4636	+	return h;
4637	+	}
4638	+
4639	+	/**
4640	+	* Implements {@link Set#equals(Object)}.
4641	+	* @param o object to be compared for equality with this set
4642	+	* @return {@code true} if the specified object is equal to this set
4643	+	*/
4644	+	public final boolean equals(Object o) {
4645	+	Set<?> c;
4646	+	return ((o instanceof Set) &&
4647	+	((c = (Set<?>)o) == this ||
4648	+	(containsAll(c) && c.containsAll(this))));
4649	+	}
4650	+	}
4651	+
4652		/**
4653		* A view of a ConcurrentHashMap as a {@link Set} of keys, in
4654		* which additions may optionally be enabled by mapping to a
4655	<	* common value.  This class cannot be directly instantiated. See
4656	<	* {@link #keySet}, {@link #keySet(Object)}, {@link #newKeySet()},
4657	<	* {@link #newKeySet(int)}.
4658	<	*/
4659	<	public static class KeySetView<K,V> extends CHMView<K,V> implements Set<K>, java.io.Serializable {
4655	>	* common value.  This class cannot be directly instantiated.
4656	>	* See {@link #keySet() keySet()},
4657	>	* {@link #keySet(Object) keySet(V)},
4658	>	* {@link #newKeySet() newKeySet()},
4659	>	* {@link #newKeySet(int) newKeySet(int)}.
4660	>	*/
4661	>	public static class KeySetView<K,V>
4662	>	extends CHMSetView<K,V,K>
4663	>	implements Set<K>, java.io.Serializable {
4664		private static final long serialVersionUID = 7249069246763182397L;
4665		private final V value;
4666	<	KeySetView(ConcurrentHashMap<K, V> map, V value) {  // non-public
4666	>	KeySetView(ConcurrentHashMap<K,V> map, V value) {  // non-public
4667		super(map);
4668		this.value = value;
4669		}
#	Line 4112 | Line 4673 | public class ConcurrentHashMap<K, V>
4673		* or {@code null} if additions are not supported.
4674		*
4675		* @return the default mapped value for additions, or {@code null}
4676	<	* if not supported.
4676	>	* if not supported
4677		*/
4678		public V getMappedValue() { return value; }
4679
4680	<	// implement Set API
4681	<
4680	>	/**
4681	>	* {@inheritDoc}
4682	>	* @throws NullPointerException if the specified key is null
4683	>	*/
4684		public boolean contains(Object o) { return map.containsKey(o); }
4122	–	public boolean remove(Object o)   { return map.remove(o) != null; }
4685
4686		/**
4687	<	* Returns a "weakly consistent" iterator that will never
4688	<	* throw {@link ConcurrentModificationException}, and
4689	<	* guarantees to traverse elements as they existed upon
4690	<	* construction of the iterator, and may (but is not
4691	<	* guaranteed to) reflect any modifications subsequent to
4692	<	* construction.
4687	>	* Removes the key from this map view, by removing the key (and its
4688	>	* corresponding value) from the backing map.  This method does
4689	>	* nothing if the key is not in the map.
4690	>	*
4691	>	* @param  o the key to be removed from the backing map
4692	>	* @return {@code true} if the backing map contained the specified key
4693	>	* @throws NullPointerException if the specified key is null
4694	>	*/
4695	>	public boolean remove(Object o) { return map.remove(o) != null; }
4696	>
4697	>	/**
4698	>	* @return an iterator over the keys of the backing map
4699	>	*/
4700	>	public Iterator<K> iterator() { return new KeyIterator<K,V>(map); }
4701	>
4702	>	/**
4703	>	* Adds the specified key to this set view by mapping the key to
4704	>	* the default mapped value in the backing map, if defined.
4705		*
4706	<	* @return an iterator over the keys of this map
4706	>	* @param e key to be added
4707	>	* @return {@code true} if this set changed as a result of the call
4708	>	* @throws NullPointerException if the specified key is null
4709	>	* @throws UnsupportedOperationException if no default mapped value
4710	>	* for additions was provided
4711		*/
4134	–	public Iterator<K> iterator()     { return new KeyIterator<K,V>(map); }
4712		public boolean add(K e) {
4713		V v;
4714		if ((v = value) == null)
4715		throw new UnsupportedOperationException();
4716	<	if (e == null)
4140	<	throw new NullPointerException();
4141	<	return map.internalPutIfAbsent(e, v) == null;
4716	>	return map.internalPut(e, v, true) == null;
4717		}
4718	+
4719	+	/**
4720	+	* Adds all of the elements in the specified collection to this set,
4721	+	* as if by calling {@link #add} on each one.
4722	+	*
4723	+	* @param c the elements to be inserted into this set
4724	+	* @return {@code true} if this set changed as a result of the call
4725	+	* @throws NullPointerException if the collection or any of its
4726	+	* elements are {@code null}
4727	+	* @throws UnsupportedOperationException if no default mapped value
4728	+	* for additions was provided
4729	+	*/
4730		public boolean addAll(Collection<? extends K> c) {
4731		boolean added = false;
4732		V v;
4733		if ((v = value) == null)
4734		throw new UnsupportedOperationException();
4735		for (K e : c) {
4736	<	if (e == null)
4150	<	throw new NullPointerException();
4151	<	if (map.internalPutIfAbsent(e, v) == null)
4736	>	if (map.internalPut(e, v, true) == null)
4737		added = true;
4738		}
4739		return added;
4740		}
4156	–	public boolean equals(Object o) {
4157	–	Set<?> c;
4158	–	return ((o instanceof Set) &&
4159	–	((c = (Set<?>)o) == this ||
4160	–	(containsAll(c) && c.containsAll(this))));
4161	–	}
4162	–
4163	–	/**
4164	–	* Performs the given action for each key.
4165	–	*
4166	–	* @param action the action
4167	–	*/
4168	–	public void forEach(Action<K> action) {
4169	–	ForkJoinTasks.forEachKey
4170	–	(map, action).invoke();
4171	–	}
4172	–
4173	–	/**
4174	–	* Performs the given action for each non-null transformation
4175	–	* of each key.
4176	–	*
4177	–	* @param transformer a function returning the transformation
4178	–	* for an element, or null of there is no transformation (in
4179	–	* which case the action is not applied).
4180	–	* @param action the action
4181	–	*/
4182	–	public <U> void forEach(Fun<? super K, ? extends U> transformer,
4183	–	Action<U> action) {
4184	–	ForkJoinTasks.forEachKey
4185	–	(map, transformer, action).invoke();
4186	–	}
4187	–
4188	–	/**
4189	–	* Returns a non-null result from applying the given search
4190	–	* function on each key, or null if none. Upon success,
4191	–	* further element processing is suppressed and the results of
4192	–	* any other parallel invocations of the search function are
4193	–	* ignored.
4194	–	*
4195	–	* @param searchFunction a function returning a non-null
4196	–	* result on success, else null
4197	–	* @return a non-null result from applying the given search
4198	–	* function on each key, or null if none
4199	–	*/
4200	–	public <U> U search(Fun<? super K, ? extends U> searchFunction) {
4201	–	return ForkJoinTasks.searchKeys
4202	–	(map, searchFunction).invoke();
4203	–	}
4204	–
4205	–	/**
4206	–	* Returns the result of accumulating all keys using the given
4207	–	* reducer to combine values, or null if none.
4208	–	*
4209	–	* @param reducer a commutative associative combining function
4210	–	* @return the result of accumulating all keys using the given
4211	–	* reducer to combine values, or null if none
4212	–	*/
4213	–	public K reduce(BiFun<? super K, ? super K, ? extends K> reducer) {
4214	–	return ForkJoinTasks.reduceKeys
4215	–	(map, reducer).invoke();
4216	–	}
4217	–
4218	–	/**
4219	–	* Returns the result of accumulating the given transformation
4220	–	* of all keys using the given reducer to combine values, and
4221	–	* the given basis as an identity value.
4222	–	*
4223	–	* @param transformer a function returning the transformation
4224	–	* for an element
4225	–	* @param basis the identity (initial default value) for the reduction
4226	–	* @param reducer a commutative associative combining function
4227	–	* @return  the result of accumulating the given transformation
4228	–	* of all keys
4229	–	*/
4230	–	public double reduceToDouble(ObjectToDouble<? super K> transformer,
4231	–	double basis,
4232	–	DoubleByDoubleToDouble reducer) {
4233	–	return ForkJoinTasks.reduceKeysToDouble
4234	–	(map, transformer, basis, reducer).invoke();
4235	–	}
4236	–
4741
4742	<	/**
4743	<	* Returns the result of accumulating the given transformation
4240	<	* of all keys using the given reducer to combine values, and
4241	<	* the given basis as an identity value.
4242	<	*
4243	<	* @param transformer a function returning the transformation
4244	<	* for an element
4245	<	* @param basis the identity (initial default value) for the reduction
4246	<	* @param reducer a commutative associative combining function
4247	<	* @return the result of accumulating the given transformation
4248	<	* of all keys
4249	<	*/
4250	<	public long reduceToLong(ObjectToLong<? super K> transformer,
4251	<	long basis,
4252	<	LongByLongToLong reducer) {
4253	<	return ForkJoinTasks.reduceKeysToLong
4254	<	(map, transformer, basis, reducer).invoke();
4742	>	public Stream<K> stream() {
4743	>	return Streams.stream(new KeyIterator<>(map, null));
4744		}
4745	<
4746	<	/**
4258	<	* Returns the result of accumulating the given transformation
4259	<	* of all keys using the given reducer to combine values, and
4260	<	* the given basis as an identity value.
4261	<	*
4262	<	* @param transformer a function returning the transformation
4263	<	* for an element
4264	<	* @param basis the identity (initial default value) for the reduction
4265	<	* @param reducer a commutative associative combining function
4266	<	* @return the result of accumulating the given transformation
4267	<	* of all keys
4268	<	*/
4269	<	public int reduceToInt(ObjectToInt<? super K> transformer,
4270	<	int basis,
4271	<	IntByIntToInt reducer) {
4272	<	return ForkJoinTasks.reduceKeysToInt
4273	<	(map, transformer, basis, reducer).invoke();
4745	>	public Stream<K> parallelStream() {
4746	>	return Streams.parallelStream(new KeyIterator<K,V>(map, null));
4747		}
4275	–
4748		}
4749
4750		/**
4751		* A view of a ConcurrentHashMap as a {@link Collection} of
4752		* values, in which additions are disabled. This class cannot be
4753	<	* directly instantiated. See {@link #values},
4753	>	* directly instantiated. See {@link #values()}.
4754		*
4755		* <p>The view's {@code iterator} is a "weakly consistent" iterator
4756		* that will never throw {@link ConcurrentModificationException},
#	Line 4286 | Line 4758 | public class ConcurrentHashMap<K, V>
4758		* construction of the iterator, and may (but is not guaranteed to)
4759		* reflect any modifications subsequent to construction.
4760		*/
4761	<	public static final class ValuesView<K,V> extends CHMView<K,V>
4762	<	implements Collection<V> {
4763	<	ValuesView(ConcurrentHashMap<K, V> map)   { super(map); }
4764	<	public final boolean contains(Object o) { return map.containsValue(o); }
4761	>	public static final class ValuesView<K,V>
4762	>	extends CHMCollectionView<K,V,V>
4763	>	implements Collection<V>, java.io.Serializable {
4764	>	private static final long serialVersionUID = 2249069246763182397L;
4765	>	ValuesView(ConcurrentHashMap<K,V> map) { super(map); }
4766	>	public final boolean contains(Object o) {
4767	>	return map.containsValue(o);
4768	>	}
4769		public final boolean remove(Object o) {
4770		if (o != null) {
4771	<	Iterator<V> it = new ValueIterator<K,V>(map);
4296	<	while (it.hasNext()) {
4771	>	for (Iterator<V> it = iterator(); it.hasNext();) {
4772		if (o.equals(it.next())) {
4773		it.remove();
4774		return true;
#	Line 4304 | Line 4779 | public class ConcurrentHashMap<K, V>
4779		}
4780
4781		/**
4782	<	* Returns a "weakly consistent" iterator that will never
4308	<	* throw {@link ConcurrentModificationException}, and
4309	<	* guarantees to traverse elements as they existed upon
4310	<	* construction of the iterator, and may (but is not
4311	<	* guaranteed to) reflect any modifications subsequent to
4312	<	* construction.
4313	<	*
4314	<	* @return an iterator over the values of this map
4782	>	* @return an iterator over the values of the backing map
4783		*/
4784		public final Iterator<V> iterator() {
4785		return new ValueIterator<K,V>(map);
4786		}
4787	+
4788	+	/** Always throws {@link UnsupportedOperationException}. */
4789		public final boolean add(V e) {
4790		throw new UnsupportedOperationException();
4791		}
4792	+	/** Always throws {@link UnsupportedOperationException}. */
4793		public final boolean addAll(Collection<? extends V> c) {
4794		throw new UnsupportedOperationException();
4795		}
4796
4797	<	/**
4798	<	* Performs the given action for each value.
4328	<	*
4329	<	* @param action the action
4330	<	*/
4331	<	public void forEach(Action<V> action) {
4332	<	ForkJoinTasks.forEachValue
4333	<	(map, action).invoke();
4797	>	public Stream<V> stream() {
4798	>	return Streams.stream(new ValueIterator<K,V>(map, null));
4799		}
4800
4801	<	/**
4802	<	* Performs the given action for each non-null transformation
4338	<	* of each value.
4339	<	*
4340	<	* @param transformer a function returning the transformation
4341	<	* for an element, or null of there is no transformation (in
4342	<	* which case the action is not applied).
4343	<	*/
4344	<	public <U> void forEach(Fun<? super V, ? extends U> transformer,
4345	<	Action<U> action) {
4346	<	ForkJoinTasks.forEachValue
4347	<	(map, transformer, action).invoke();
4348	<	}
4349	<
4350	<	/**
4351	<	* Returns a non-null result from applying the given search
4352	<	* function on each value, or null if none.  Upon success,
4353	<	* further element processing is suppressed and the results of
4354	<	* any other parallel invocations of the search function are
4355	<	* ignored.
4356	<	*
4357	<	* @param searchFunction a function returning a non-null
4358	<	* result on success, else null
4359	<	* @return a non-null result from applying the given search
4360	<	* function on each value, or null if none
4361	<	*
4362	<	*/
4363	<	public <U> U search(Fun<? super V, ? extends U> searchFunction) {
4364	<	return ForkJoinTasks.searchValues
4365	<	(map, searchFunction).invoke();
4366	<	}
4367	<
4368	<	/**
4369	<	* Returns the result of accumulating all values using the
4370	<	* given reducer to combine values, or null if none.
4371	<	*
4372	<	* @param reducer a commutative associative combining function
4373	<	* @return  the result of accumulating all values
4374	<	*/
4375	<	public V reduce(BiFun<? super V, ? super V, ? extends V> reducer) {
4376	<	return ForkJoinTasks.reduceValues
4377	<	(map, 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, or
4383	<	* null if none.
4384	<	*
4385	<	* @param transformer a function returning the transformation
4386	<	* for an element, or null of there is no transformation (in
4387	<	* which case it is not combined).
4388	<	* @param reducer a commutative associative combining function
4389	<	* @return the result of accumulating the given transformation
4390	<	* of all values
4391	<	*/
4392	<	public <U> U reduce(Fun<? super V, ? extends U> transformer,
4393	<	BiFun<? super U, ? super U, ? extends U> reducer) {
4394	<	return ForkJoinTasks.reduceValues
4395	<	(map, transformer, reducer).invoke();
4396	<	}
4397	<
4398	<	/**
4399	<	* Returns the result of accumulating the given transformation
4400	<	* of all values using the given reducer to combine values,
4401	<	* and the given basis as an identity value.
4402	<	*
4403	<	* @param transformer a function returning the transformation
4404	<	* for an element
4405	<	* @param basis the identity (initial default value) for the reduction
4406	<	* @param reducer a commutative associative combining function
4407	<	* @return the result of accumulating the given transformation
4408	<	* of all values
4409	<	*/
4410	<	public double reduceToDouble(ObjectToDouble<? super V> transformer,
4411	<	double basis,
4412	<	DoubleByDoubleToDouble reducer) {
4413	<	return ForkJoinTasks.reduceValuesToDouble
4414	<	(map, transformer, basis, reducer).invoke();
4415	<	}
4416	<
4417	<	/**
4418	<	* Returns the result of accumulating the given transformation
4419	<	* of all values using the given reducer to combine values,
4420	<	* and the given basis as an identity value.
4421	<	*
4422	<	* @param transformer a function returning the transformation
4423	<	* for an element
4424	<	* @param basis the identity (initial default value) for the reduction
4425	<	* @param reducer a commutative associative combining function
4426	<	* @return the result of accumulating the given transformation
4427	<	* of all values
4428	<	*/
4429	<	public long reduceToLong(ObjectToLong<? super V> transformer,
4430	<	long basis,
4431	<	LongByLongToLong reducer) {
4432	<	return ForkJoinTasks.reduceValuesToLong
4433	<	(map, transformer, basis, reducer).invoke();
4434	<	}
4435	<
4436	<	/**
4437	<	* Returns the result of accumulating the given transformation
4438	<	* of all values using the given reducer to combine values,
4439	<	* and the given basis as an identity value.
4440	<	*
4441	<	* @param transformer a function returning the transformation
4442	<	* for an element
4443	<	* @param basis the identity (initial default value) for the reduction
4444	<	* @param reducer a commutative associative combining function
4445	<	* @return the result of accumulating the given transformation
4446	<	* of all values
4447	<	*/
4448	<	public int reduceToInt(ObjectToInt<? super V> transformer,
4449	<	int basis,
4450	<	IntByIntToInt reducer) {
4451	<	return ForkJoinTasks.reduceValuesToInt
4452	<	(map, transformer, basis, reducer).invoke();
4801	>	public Stream<V> parallelStream() {
4802	>	return Streams.parallelStream(new ValueIterator<K,V>(map, null));
4803		}
4804
4805		}
#	Line 4457 | Line 4807 | public class ConcurrentHashMap<K, V>
4807		/**
4808		* A view of a ConcurrentHashMap as a {@link Set} of (key, value)
4809		* entries.  This class cannot be directly instantiated. See
4810	<	* {@link #entrySet}.
4810	>	* {@link #entrySet()}.
4811		*/
4812	<	public static final class EntrySetView<K,V> extends CHMView<K,V>
4813	<	implements Set<Map.Entry<K,V>> {
4814	<	EntrySetView(ConcurrentHashMap<K, V> map) { super(map); }
4812	>	public static final class EntrySetView<K,V>
4813	>	extends CHMSetView<K,V,Map.Entry<K,V>>
4814	>	implements Set<Map.Entry<K,V>>, java.io.Serializable {
4815	>	private static final long serialVersionUID = 2249069246763182397L;
4816	>	EntrySetView(ConcurrentHashMap<K,V> map) { super(map); }
4817	>
4818		public final boolean contains(Object o) {
4819		Object k, v, r; Map.Entry<?,?> e;
4820		return ((o instanceof Map.Entry) &&
#	Line 4479 | Line 4832 | public class ConcurrentHashMap<K, V>
4832		}
4833
4834		/**
4835	<	* Returns a "weakly consistent" iterator that will never
4483	<	* throw {@link ConcurrentModificationException}, and
4484	<	* guarantees to traverse elements as they existed upon
4485	<	* construction of the iterator, and may (but is not
4486	<	* guaranteed to) reflect any modifications subsequent to
4487	<	* construction.
4488	<	*
4489	<	* @return an iterator over the entries of this map
4835	>	* @return an iterator over the entries of the backing map
4836		*/
4837		public final Iterator<Map.Entry<K,V>> iterator() {
4838		return new EntryIterator<K,V>(map);
4839		}
4840
4841	+	/**
4842	+	* Adds the specified mapping to this view.
4843	+	*
4844	+	* @param e mapping to be added
4845	+	* @return {@code true} if this set changed as a result of the call
4846	+	* @throws NullPointerException if the entry, its key, or its
4847	+	* value is null
4848	+	*/
4849		public final boolean add(Entry<K,V> e) {
4850	<	K key = e.getKey();
4497	<	V value = e.getValue();
4498	<	if (key == null || value == null)
4499	<	throw new NullPointerException();
4500	<	return map.internalPut(key, value) == null;
4850	>	return map.internalPut(e.getKey(), e.getValue(), false) == null;
4851		}
4852	+	/**
4853	+	* Adds all of the mappings in the specified collection to this
4854	+	* set, as if by calling {@link #add(Map.Entry)} on each one.
4855	+	* @param c the mappings to be inserted into this set
4856	+	* @return {@code true} if this set changed as a result of the call
4857	+	* @throws NullPointerException if the collection or any of its
4858	+	* entries, keys, or values are null
4859	+	*/
4860		public final boolean addAll(Collection<? extends Entry<K,V>> c) {
4861		boolean added = false;
4862		for (Entry<K,V> e : c) {
#	Line 4507 | Line 4865 | public class ConcurrentHashMap<K, V>
4865		}
4866		return added;
4867		}
4510	–	public boolean equals(Object o) {
4511	–	Set<?> c;
4512	–	return ((o instanceof Set) &&
4513	–	((c = (Set<?>)o) == this ||
4514	–	(containsAll(c) && c.containsAll(this))));
4515	–	}
4516	–
4517	–	/**
4518	–	* Performs the given action for each entry.
4519	–	*
4520	–	* @param action the action
4521	–	*/
4522	–	public void forEach(Action<Map.Entry<K,V>> action) {
4523	–	ForkJoinTasks.forEachEntry
4524	–	(map, action).invoke();
4525	–	}
4526	–
4527	–	/**
4528	–	* Performs the given action for each non-null transformation
4529	–	* of each entry.
4530	–	*
4531	–	* @param transformer a function returning the transformation
4532	–	* for an element, or null of there is no transformation (in
4533	–	* which case the action is not applied).
4534	–	* @param action the action
4535	–	*/
4536	–	public <U> void forEach(Fun<Map.Entry<K,V>, ? extends U> transformer,
4537	–	Action<U> action) {
4538	–	ForkJoinTasks.forEachEntry
4539	–	(map, transformer, action).invoke();
4540	–	}
4868
4869	<	/**
4870	<	* Returns a non-null result from applying the given search
4544	<	* function on each entry, or null if none.  Upon success,
4545	<	* further element processing is suppressed and the results of
4546	<	* any other parallel invocations of the search function are
4547	<	* ignored.
4548	<	*
4549	<	* @param searchFunction a function returning a non-null
4550	<	* result on success, else null
4551	<	* @return a non-null result from applying the given search
4552	<	* function on each entry, or null if none
4553	<	*/
4554	<	public <U> U search(Fun<Map.Entry<K,V>, ? extends U> searchFunction) {
4555	<	return ForkJoinTasks.searchEntries
4556	<	(map, searchFunction).invoke();
4869	>	public Stream<Map.Entry<K,V>> stream() {
4870	>	return Streams.stream(new EntryIterator<K,V>(map, null));
4871		}
4872
4873	<	/**
4874	<	* Returns the result of accumulating all entries using the
4561	<	* given reducer to combine values, or null if none.
4562	<	*
4563	<	* @param reducer a commutative associative combining function
4564	<	* @return the result of accumulating all entries
4565	<	*/
4566	<	public Map.Entry<K,V> reduce(BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
4567	<	return ForkJoinTasks.reduceEntries
4568	<	(map, reducer).invoke();
4873	>	public Stream<Map.Entry<K,V>> parallelStream() {
4874	>	return Streams.parallelStream(new EntryIterator<K,V>(map, null));
4875		}
4570	–
4571	–	/**
4572	–	* Returns the result of accumulating the given transformation
4573	–	* of all entries using the given reducer to combine values,
4574	–	* or null if none.
4575	–	*
4576	–	* @param transformer a function returning the transformation
4577	–	* for an element, or null of there is no transformation (in
4578	–	* which case it is not combined).
4579	–	* @param reducer a commutative associative combining function
4580	–	* @return the result of accumulating the given transformation
4581	–	* of all entries
4582	–	*/
4583	–	public <U> U reduce(Fun<Map.Entry<K,V>, ? extends U> transformer,
4584	–	BiFun<? super U, ? super U, ? extends U> reducer) {
4585	–	return ForkJoinTasks.reduceEntries
4586	–	(map, transformer, reducer).invoke();
4587	–	}
4588	–
4589	–	/**
4590	–	* Returns the result of accumulating the given transformation
4591	–	* of all entries using the given reducer to combine values,
4592	–	* and the given basis as an identity value.
4593	–	*
4594	–	* @param transformer a function returning the transformation
4595	–	* for an element
4596	–	* @param basis the identity (initial default value) for the reduction
4597	–	* @param reducer a commutative associative combining function
4598	–	* @return the result of accumulating the given transformation
4599	–	* of all entries
4600	–	*/
4601	–	public double reduceToDouble(ObjectToDouble<Map.Entry<K,V>> transformer,
4602	–	double basis,
4603	–	DoubleByDoubleToDouble reducer) {
4604	–	return ForkJoinTasks.reduceEntriesToDouble
4605	–	(map, transformer, basis, reducer).invoke();
4606	–	}
4607	–
4608	–	/**
4609	–	* Returns the result of accumulating the given transformation
4610	–	* of all entries using the given reducer to combine values,
4611	–	* and the given basis as an identity value.
4612	–	*
4613	–	* @param transformer a function returning the transformation
4614	–	* for an element
4615	–	* @param basis the identity (initial default value) for the reduction
4616	–	* @param reducer a commutative associative combining function
4617	–	* @return  the result of accumulating the given transformation
4618	–	* of all entries
4619	–	*/
4620	–	public long reduceToLong(ObjectToLong<Map.Entry<K,V>> transformer,
4621	–	long basis,
4622	–	LongByLongToLong reducer) {
4623	–	return ForkJoinTasks.reduceEntriesToLong
4624	–	(map, transformer, basis, reducer).invoke();
4625	–	}
4626	–
4627	–	/**
4628	–	* Returns the result of accumulating the given transformation
4629	–	* of all entries using the given reducer to combine values,
4630	–	* and the given basis as an identity value.
4631	–	*
4632	–	* @param transformer a function returning the transformation
4633	–	* for an element
4634	–	* @param basis the identity (initial default value) for the reduction
4635	–	* @param reducer a commutative associative combining function
4636	–	* @return the result of accumulating the given transformation
4637	–	* of all entries
4638	–	*/
4639	–	public int reduceToInt(ObjectToInt<Map.Entry<K,V>> transformer,
4640	–	int basis,
4641	–	IntByIntToInt reducer) {
4642	–	return ForkJoinTasks.reduceEntriesToInt
4643	–	(map, transformer, basis, reducer).invoke();
4644	–	}
4645	–
4876		}
4877
4878		// ---------------------------------------------------------------------
#	Line 4669 | Line 4899 | public class ConcurrentHashMap<K, V>
4899		*/
4900		public static <K,V> ForkJoinTask<Void> forEach
4901		(ConcurrentHashMap<K,V> map,
4902	<	BiAction<K,V> action) {
4902	>	BiConsumer<? super K, ? super V> action) {
4903		if (action == null) throw new NullPointerException();
4904	<	return new ForEachMappingTask<K,V>(map, null, -1, null, action);
4904	>	return new ForEachMappingTask<K,V>(map, null, -1, action);
4905		}
4906
4907		/**
#	Line 4687 | Line 4917 | public class ConcurrentHashMap<K, V>
4917		*/
4918		public static <K,V,U> ForkJoinTask<Void> forEach
4919		(ConcurrentHashMap<K,V> map,
4920	<	BiFun<? super K, ? super V, ? extends U> transformer,
4921	<	Action<U> action) {
4920	>	BiFunction<? super K, ? super V, ? extends U> transformer,
4921	>	Consumer<? super U> action) {
4922		if (transformer == null || action == null)
4923		throw new NullPointerException();
4924		return new ForEachTransformedMappingTask<K,V,U>
4925	<	(map, null, -1, null, transformer, action);
4925	>	(map, null, -1, transformer, action);
4926		}
4927
4928		/**
#	Line 4709 | Line 4939 | public class ConcurrentHashMap<K, V>
4939		*/
4940		public static <K,V,U> ForkJoinTask<U> search
4941		(ConcurrentHashMap<K,V> map,
4942	<	BiFun<? super K, ? super V, ? extends U> searchFunction) {
4942	>	BiFunction<? super K, ? super V, ? extends U> searchFunction) {
4943		if (searchFunction == null) throw new NullPointerException();
4944		return new SearchMappingsTask<K,V,U>
4945	<	(map, null, -1, null, searchFunction,
4945	>	(map, null, -1, searchFunction,
4946		new AtomicReference<U>());
4947		}
4948
#	Line 4724 | Line 4954 | public class ConcurrentHashMap<K, V>
4954		* @param map the map
4955		* @param transformer a function returning the transformation
4956		* for an element, or null if there is no transformation (in
4957	<	* which case it is not combined).
4957	>	* which case it is not combined)
4958		* @param reducer a commutative associative combining function
4959		* @return the task
4960		*/
4961		public static <K,V,U> ForkJoinTask<U> reduce
4962		(ConcurrentHashMap<K,V> map,
4963	<	BiFun<? super K, ? super V, ? extends U> transformer,
4964	<	BiFun<? super U, ? super U, ? extends U> reducer) {
4963	>	BiFunction<? super K, ? super V, ? extends U> transformer,
4964	>	BiFunction<? super U, ? super U, ? extends U> reducer) {
4965		if (transformer == null || reducer == null)
4966		throw new NullPointerException();
4967		return new MapReduceMappingsTask<K,V,U>
#	Line 4753 | Line 4983 | public class ConcurrentHashMap<K, V>
4983		*/
4984		public static <K,V> ForkJoinTask<Double> reduceToDouble
4985		(ConcurrentHashMap<K,V> map,
4986	<	ObjectByObjectToDouble<? super K, ? super V> transformer,
4986	>	ToDoubleBiFunction<? super K, ? super V> transformer,
4987		double basis,
4988	<	DoubleByDoubleToDouble reducer) {
4988	>	DoubleBinaryOperator reducer) {
4989		if (transformer == null || reducer == null)
4990		throw new NullPointerException();
4991		return new MapReduceMappingsToDoubleTask<K,V>
#	Line 4777 | Line 5007 | public class ConcurrentHashMap<K, V>
5007		*/
5008		public static <K,V> ForkJoinTask<Long> reduceToLong
5009		(ConcurrentHashMap<K,V> map,
5010	<	ObjectByObjectToLong<? super K, ? super V> transformer,
5010	>	ToLongBiFunction<? super K, ? super V> transformer,
5011		long basis,
5012	<	LongByLongToLong reducer) {
5012	>	LongBinaryOperator reducer) {
5013		if (transformer == null || reducer == null)
5014		throw new NullPointerException();
5015		return new MapReduceMappingsToLongTask<K,V>
#	Line 4792 | Line 5022 | public class ConcurrentHashMap<K, V>
5022		* using the given reducer to combine values, and the given
5023		* basis as an identity value.
5024		*
5025	+	* @param map the map
5026		* @param transformer a function returning the transformation
5027		* for an element
5028		* @param basis the identity (initial default value) for the reduction
#	Line 4800 | Line 5031 | public class ConcurrentHashMap<K, V>
5031		*/
5032		public static <K,V> ForkJoinTask<Integer> reduceToInt
5033		(ConcurrentHashMap<K,V> map,
5034	<	ObjectByObjectToInt<? super K, ? super V> transformer,
5034	>	ToIntBiFunction<? super K, ? super V> transformer,
5035		int basis,
5036	<	IntByIntToInt reducer) {
5036	>	IntBinaryOperator reducer) {
5037		if (transformer == null || reducer == null)
5038		throw new NullPointerException();
5039		return new MapReduceMappingsToIntTask<K,V>
#	Line 4819 | Line 5050 | public class ConcurrentHashMap<K, V>
5050		*/
5051		public static <K,V> ForkJoinTask<Void> forEachKey
5052		(ConcurrentHashMap<K,V> map,
5053	<	Action<K> action) {
5053	>	Consumer<? super K> action) {
5054		if (action == null) throw new NullPointerException();
5055	<	return new ForEachKeyTask<K,V>(map, null, -1, null, action);
5055	>	return new ForEachKeyTask<K,V>(map, null, -1, action);
5056		}
5057
5058		/**
#	Line 4837 | Line 5068 | public class ConcurrentHashMap<K, V>
5068		*/
5069		public static <K,V,U> ForkJoinTask<Void> forEachKey
5070		(ConcurrentHashMap<K,V> map,
5071	<	Fun<? super K, ? extends U> transformer,
5072	<	Action<U> action) {
5071	>	Function<? super K, ? extends U> transformer,
5072	>	Consumer<? super U> action) {
5073		if (transformer == null || action == null)
5074		throw new NullPointerException();
5075		return new ForEachTransformedKeyTask<K,V,U>
5076	<	(map, null, -1, null, transformer, action);
5076	>	(map, null, -1, transformer, action);
5077		}
5078
5079		/**
#	Line 4859 | Line 5090 | public class ConcurrentHashMap<K, V>
5090		*/
5091		public static <K,V,U> ForkJoinTask<U> searchKeys
5092		(ConcurrentHashMap<K,V> map,
5093	<	Fun<? super K, ? extends U> searchFunction) {
5093	>	Function<? super K, ? extends U> searchFunction) {
5094		if (searchFunction == null) throw new NullPointerException();
5095		return new SearchKeysTask<K,V,U>
5096	<	(map, null, -1, null, searchFunction,
5096	>	(map, null, -1, searchFunction,
5097		new AtomicReference<U>());
5098		}
5099
#	Line 4877 | Line 5108 | public class ConcurrentHashMap<K, V>
5108		*/
5109		public static <K,V> ForkJoinTask<K> reduceKeys
5110		(ConcurrentHashMap<K,V> map,
5111	<	BiFun<? super K, ? super K, ? extends K> reducer) {
5111	>	BiFunction<? super K, ? super K, ? extends K> reducer) {
5112		if (reducer == null) throw new NullPointerException();
5113		return new ReduceKeysTask<K,V>
5114		(map, null, -1, null, reducer);
#	Line 4891 | Line 5122 | public class ConcurrentHashMap<K, V>
5122		* @param map the map
5123		* @param transformer a function returning the transformation
5124		* for an element, or null if there is no transformation (in
5125	<	* which case it is not combined).
5125	>	* which case it is not combined)
5126		* @param reducer a commutative associative combining function
5127		* @return the task
5128		*/
5129		public static <K,V,U> ForkJoinTask<U> reduceKeys
5130		(ConcurrentHashMap<K,V> map,
5131	<	Fun<? super K, ? extends U> transformer,
5132	<	BiFun<? super U, ? super U, ? extends U> reducer) {
5131	>	Function<? super K, ? extends U> transformer,
5132	>	BiFunction<? super U, ? super U, ? extends U> reducer) {
5133		if (transformer == null || reducer == null)
5134		throw new NullPointerException();
5135		return new MapReduceKeysTask<K,V,U>
#	Line 4920 | Line 5151 | public class ConcurrentHashMap<K, V>
5151		*/
5152		public static <K,V> ForkJoinTask<Double> reduceKeysToDouble
5153		(ConcurrentHashMap<K,V> map,
5154	<	ObjectToDouble<? super K> transformer,
5154	>	ToDoubleFunction<? super K> transformer,
5155		double basis,
5156	<	DoubleByDoubleToDouble reducer) {
5156	>	DoubleBinaryOperator reducer) {
5157		if (transformer == null || reducer == null)
5158		throw new NullPointerException();
5159		return new MapReduceKeysToDoubleTask<K,V>
#	Line 4944 | Line 5175 | public class ConcurrentHashMap<K, V>
5175		*/
5176		public static <K,V> ForkJoinTask<Long> reduceKeysToLong
5177		(ConcurrentHashMap<K,V> map,
5178	<	ObjectToLong<? super K> transformer,
5178	>	ToLongFunction<? super K> transformer,
5179		long basis,
5180	<	LongByLongToLong reducer) {
5180	>	LongBinaryOperator reducer) {
5181		if (transformer == null || reducer == null)
5182		throw new NullPointerException();
5183		return new MapReduceKeysToLongTask<K,V>
#	Line 4968 | Line 5199 | public class ConcurrentHashMap<K, V>
5199		*/
5200		public static <K,V> ForkJoinTask<Integer> reduceKeysToInt
5201		(ConcurrentHashMap<K,V> map,
5202	<	ObjectToInt<? super K> transformer,
5202	>	ToIntFunction<? super K> transformer,
5203		int basis,
5204	<	IntByIntToInt reducer) {
5204	>	IntBinaryOperator reducer) {
5205		if (transformer == null || reducer == null)
5206		throw new NullPointerException();
5207		return new MapReduceKeysToIntTask<K,V>
#	Line 4983 | Line 5214 | public class ConcurrentHashMap<K, V>
5214		*
5215		* @param map the map
5216		* @param action the action
5217	+	* @return the task
5218		*/
5219		public static <K,V> ForkJoinTask<Void> forEachValue
5220		(ConcurrentHashMap<K,V> map,
5221	<	Action<V> action) {
5221	>	Consumer<? super V> action) {
5222		if (action == null) throw new NullPointerException();
5223	<	return new ForEachValueTask<K,V>(map, null, -1, null, action);
5223	>	return new ForEachValueTask<K,V>(map, null, -1, action);
5224		}
5225
5226		/**
#	Line 5000 | Line 5232 | public class ConcurrentHashMap<K, V>
5232		* for an element, or null if there is no transformation (in
5233		* which case the action is not applied)
5234		* @param action the action
5235	+	* @return the task
5236		*/
5237		public static <K,V,U> ForkJoinTask<Void> forEachValue
5238		(ConcurrentHashMap<K,V> map,
5239	<	Fun<? super V, ? extends U> transformer,
5240	<	Action<U> action) {
5239	>	Function<? super V, ? extends U> transformer,
5240	>	Consumer<? super U> action) {
5241		if (transformer == null || action == null)
5242		throw new NullPointerException();
5243		return new ForEachTransformedValueTask<K,V,U>
5244	<	(map, null, -1, null, transformer, action);
5244	>	(map, null, -1, transformer, action);
5245		}
5246
5247		/**
#	Line 5025 | Line 5258 | public class ConcurrentHashMap<K, V>
5258		*/
5259		public static <K,V,U> ForkJoinTask<U> searchValues
5260		(ConcurrentHashMap<K,V> map,
5261	<	Fun<? super V, ? extends U> searchFunction) {
5261	>	Function<? super V, ? extends U> searchFunction) {
5262		if (searchFunction == null) throw new NullPointerException();
5263		return new SearchValuesTask<K,V,U>
5264	<	(map, null, -1, null, searchFunction,
5264	>	(map, null, -1, searchFunction,
5265		new AtomicReference<U>());
5266		}
5267
#	Line 5043 | Line 5276 | public class ConcurrentHashMap<K, V>
5276		*/
5277		public static <K,V> ForkJoinTask<V> reduceValues
5278		(ConcurrentHashMap<K,V> map,
5279	<	BiFun<? super V, ? super V, ? extends V> reducer) {
5279	>	BiFunction<? super V, ? super V, ? extends V> reducer) {
5280		if (reducer == null) throw new NullPointerException();
5281		return new ReduceValuesTask<K,V>
5282		(map, null, -1, null, reducer);
#	Line 5057 | Line 5290 | public class ConcurrentHashMap<K, V>
5290		* @param map the map
5291		* @param transformer a function returning the transformation
5292		* for an element, or null if there is no transformation (in
5293	<	* which case it is not combined).
5293	>	* which case it is not combined)
5294		* @param reducer a commutative associative combining function
5295		* @return the task
5296		*/
5297		public static <K,V,U> ForkJoinTask<U> reduceValues
5298		(ConcurrentHashMap<K,V> map,
5299	<	Fun<? super V, ? extends U> transformer,
5300	<	BiFun<? super U, ? super U, ? extends U> reducer) {
5299	>	Function<? super V, ? extends U> transformer,
5300	>	BiFunction<? super U, ? super U, ? extends U> reducer) {
5301		if (transformer == null || reducer == null)
5302		throw new NullPointerException();
5303		return new MapReduceValuesTask<K,V,U>
#	Line 5086 | Line 5319 | public class ConcurrentHashMap<K, V>
5319		*/
5320		public static <K,V> ForkJoinTask<Double> reduceValuesToDouble
5321		(ConcurrentHashMap<K,V> map,
5322	<	ObjectToDouble<? super V> transformer,
5322	>	ToDoubleFunction<? super V> transformer,
5323		double basis,
5324	<	DoubleByDoubleToDouble reducer) {
5324	>	DoubleBinaryOperator reducer) {
5325		if (transformer == null || reducer == null)
5326		throw new NullPointerException();
5327		return new MapReduceValuesToDoubleTask<K,V>
#	Line 5110 | Line 5343 | public class ConcurrentHashMap<K, V>
5343		*/
5344		public static <K,V> ForkJoinTask<Long> reduceValuesToLong
5345		(ConcurrentHashMap<K,V> map,
5346	<	ObjectToLong<? super V> transformer,
5346	>	ToLongFunction<? super V> transformer,
5347		long basis,
5348	<	LongByLongToLong reducer) {
5348	>	LongBinaryOperator reducer) {
5349		if (transformer == null || reducer == null)
5350		throw new NullPointerException();
5351		return new MapReduceValuesToLongTask<K,V>
#	Line 5134 | Line 5367 | public class ConcurrentHashMap<K, V>
5367		*/
5368		public static <K,V> ForkJoinTask<Integer> reduceValuesToInt
5369		(ConcurrentHashMap<K,V> map,
5370	<	ObjectToInt<? super V> transformer,
5370	>	ToIntFunction<? super V> transformer,
5371		int basis,
5372	<	IntByIntToInt reducer) {
5372	>	IntBinaryOperator reducer) {
5373		if (transformer == null || reducer == null)
5374		throw new NullPointerException();
5375		return new MapReduceValuesToIntTask<K,V>
#	Line 5149 | Line 5382 | public class ConcurrentHashMap<K, V>
5382		*
5383		* @param map the map
5384		* @param action the action
5385	+	* @return the task
5386		*/
5387		public static <K,V> ForkJoinTask<Void> forEachEntry
5388		(ConcurrentHashMap<K,V> map,
5389	<	Action<Map.Entry<K,V>> action) {
5389	>	Consumer<? super Map.Entry<K,V>> action) {
5390		if (action == null) throw new NullPointerException();
5391	<	return new ForEachEntryTask<K,V>(map, null, -1, null, action);
5391	>	return new ForEachEntryTask<K,V>(map, null, -1, action);
5392		}
5393
5394		/**
#	Line 5166 | Line 5400 | public class ConcurrentHashMap<K, V>
5400		* for an element, or null if there is no transformation (in
5401		* which case the action is not applied)
5402		* @param action the action
5403	+	* @return the task
5404		*/
5405		public static <K,V,U> ForkJoinTask<Void> forEachEntry
5406		(ConcurrentHashMap<K,V> map,
5407	<	Fun<Map.Entry<K,V>, ? extends U> transformer,
5408	<	Action<U> action) {
5407	>	Function<Map.Entry<K,V>, ? extends U> transformer,
5408	>	Consumer<? super U> action) {
5409		if (transformer == null || action == null)
5410		throw new NullPointerException();
5411		return new ForEachTransformedEntryTask<K,V,U>
5412	<	(map, null, -1, null, transformer, action);
5412	>	(map, null, -1, transformer, action);
5413		}
5414
5415		/**
#	Line 5191 | Line 5426 | public class ConcurrentHashMap<K, V>
5426		*/
5427		public static <K,V,U> ForkJoinTask<U> searchEntries
5428		(ConcurrentHashMap<K,V> map,
5429	<	Fun<Map.Entry<K,V>, ? extends U> searchFunction) {
5429	>	Function<Map.Entry<K,V>, ? extends U> searchFunction) {
5430		if (searchFunction == null) throw new NullPointerException();
5431		return new SearchEntriesTask<K,V,U>
5432	<	(map, null, -1, null, searchFunction,
5432	>	(map, null, -1, searchFunction,
5433		new AtomicReference<U>());
5434		}
5435
#	Line 5209 | Line 5444 | public class ConcurrentHashMap<K, V>
5444		*/
5445		public static <K,V> ForkJoinTask<Map.Entry<K,V>> reduceEntries
5446		(ConcurrentHashMap<K,V> map,
5447	<	BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
5447	>	BiFunction<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
5448		if (reducer == null) throw new NullPointerException();
5449		return new ReduceEntriesTask<K,V>
5450		(map, null, -1, null, reducer);
#	Line 5223 | Line 5458 | public class ConcurrentHashMap<K, V>
5458		* @param map the map
5459		* @param transformer a function returning the transformation
5460		* for an element, or null if there is no transformation (in
5461	<	* which case it is not combined).
5461	>	* which case it is not combined)
5462		* @param reducer a commutative associative combining function
5463		* @return the task
5464		*/
5465		public static <K,V,U> ForkJoinTask<U> reduceEntries
5466		(ConcurrentHashMap<K,V> map,
5467	<	Fun<Map.Entry<K,V>, ? extends U> transformer,
5468	<	BiFun<? super U, ? super U, ? extends U> reducer) {
5467	>	Function<Map.Entry<K,V>, ? extends U> transformer,
5468	>	BiFunction<? super U, ? super U, ? extends U> reducer) {
5469		if (transformer == null || reducer == null)
5470		throw new NullPointerException();
5471		return new MapReduceEntriesTask<K,V,U>
#	Line 5252 | Line 5487 | public class ConcurrentHashMap<K, V>
5487		*/
5488		public static <K,V> ForkJoinTask<Double> reduceEntriesToDouble
5489		(ConcurrentHashMap<K,V> map,
5490	<	ObjectToDouble<Map.Entry<K,V>> transformer,
5490	>	ToDoubleFunction<Map.Entry<K,V>> transformer,
5491		double basis,
5492	<	DoubleByDoubleToDouble reducer) {
5492	>	DoubleBinaryOperator reducer) {
5493		if (transformer == null || reducer == null)
5494		throw new NullPointerException();
5495		return new MapReduceEntriesToDoubleTask<K,V>
#	Line 5276 | Line 5511 | public class ConcurrentHashMap<K, V>
5511		*/
5512		public static <K,V> ForkJoinTask<Long> reduceEntriesToLong
5513		(ConcurrentHashMap<K,V> map,
5514	<	ObjectToLong<Map.Entry<K,V>> transformer,
5514	>	ToLongFunction<Map.Entry<K,V>> transformer,
5515		long basis,
5516	<	LongByLongToLong reducer) {
5516	>	LongBinaryOperator reducer) {
5517		if (transformer == null || reducer == null)
5518		throw new NullPointerException();
5519		return new MapReduceEntriesToLongTask<K,V>
#	Line 5300 | Line 5535 | public class ConcurrentHashMap<K, V>
5535		*/
5536		public static <K,V> ForkJoinTask<Integer> reduceEntriesToInt
5537		(ConcurrentHashMap<K,V> map,
5538	<	ObjectToInt<Map.Entry<K,V>> transformer,
5538	>	ToIntFunction<Map.Entry<K,V>> transformer,
5539		int basis,
5540	<	IntByIntToInt reducer) {
5540	>	IntBinaryOperator reducer) {
5541		if (transformer == null || reducer == null)
5542		throw new NullPointerException();
5543		return new MapReduceEntriesToIntTask<K,V>
#	Line 5312 | Line 5547 | public class ConcurrentHashMap<K, V>
5547
5548		// -------------------------------------------------------
5549
5315	–	/**
5316	–	* Base for FJ tasks for bulk operations. This adds a variant of
5317	–	* CountedCompleters and some split and merge bookkeeping to
5318	–	* iterator functionality. The forEach and reduce methods are
5319	–	* similar to those illustrated in CountedCompleter documentation,
5320	–	* except that bottom-up reduction completions perform them within
5321	–	* their compute methods. The search methods are like forEach
5322	–	* except they continually poll for success and exit early.  Also,
5323	–	* exceptions are handled in a simpler manner, by just trying to
5324	–	* complete root task exceptionally.
5325	–	*/
5326	–	@SuppressWarnings("serial") static abstract class BulkTask<K,V,R> extends Traverser<K,V,R> {
5327	–	final BulkTask<K,V,?> parent;  // completion target
5328	–	int batch;                     // split control; -1 for unknown
5329	–	int pending;                   // completion control
5330	–
5331	–	BulkTask(ConcurrentHashMap<K,V> map, BulkTask<K,V,?> parent,
5332	–	int batch) {
5333	–	super(map);
5334	–	this.parent = parent;
5335	–	this.batch = batch;
5336	–	if (parent != null && map != null) { // split parent
5337	–	Node[] t;
5338	–	if ((t = parent.tab) == null &&
5339	–	(t = parent.tab = map.table) != null)
5340	–	parent.baseLimit = parent.baseSize = t.length;
5341	–	this.tab = t;
5342	–	this.baseSize = parent.baseSize;
5343	–	int hi = this.baseLimit = parent.baseLimit;
5344	–	parent.baseLimit = this.index = this.baseIndex =
5345	–	(hi + parent.baseIndex + 1) >>> 1;
5346	–	}
5347	–	}
5348	–
5349	–	/**
5350	–	* Forces root task to complete.
5351	–	* @param ex if null, complete normally, else exceptionally
5352	–	* @return false to simplify use
5353	–	*/
5354	–	final boolean tryCompleteComputation(Throwable ex) {
5355	–	for (BulkTask<K,V,?> a = this;;) {
5356	–	BulkTask<K,V,?> p = a.parent;
5357	–	if (p == null) {
5358	–	if (ex != null)
5359	–	a.completeExceptionally(ex);
5360	–	else
5361	–	a.quietlyComplete();
5362	–	return false;
5363	–	}
5364	–	a = p;
5365	–	}
5366	–	}
5367	–
5368	–	/**
5369	–	* Version of tryCompleteComputation for function screening checks
5370	–	*/
5371	–	final boolean abortOnNullFunction() {
5372	–	return tryCompleteComputation(new Error("Unexpected null function"));
5373	–	}
5374	–
5375	–	// utilities
5376	–
5377	–	/** CompareAndSet pending count */
5378	–	final boolean casPending(int cmp, int val) {
5379	–	return U.compareAndSwapInt(this, PENDING, cmp, val);
5380	–	}
5381	–
5382	–	/**
5383	–	* Returns approx exp2 of the number of times (minus one) to
5384	–	* split task by two before executing leaf action. This value
5385	–	* is faster to compute and more convenient to use as a guide
5386	–	* to splitting than is the depth, since it is used while
5387	–	* dividing by two anyway.
5388	–	*/
5389	–	final int batch() {
5390	–	ConcurrentHashMap<K, V> m; int b; Node[] t;  ForkJoinPool pool;
5391	–	if ((b = batch) < 0 && (m = map) != null) { // force initialization
5392	–	if ((t = tab) == null && (t = tab = m.table) != null)
5393	–	baseLimit = baseSize = t.length;
5394	–	if (t != null) {
5395	–	long n = m.counter.sum();
5396	–	int par = ((pool = getPool()) == null) ?
5397	–	ForkJoinPool.getCommonPoolParallelism() :
5398	–	pool.getParallelism();
5399	–	int sp = par << 3; // slack of 8
5400	–	b = batch = (n <= 0L) ? 0 : (n < (long)sp) ? (int)n : sp;
5401	–	}
5402	–	}
5403	–	return b;
5404	–	}
5405	–
5406	–	/**
5407	–	* Returns exportable snapshot entry.
5408	–	*/
5409	–	static <K,V> AbstractMap.SimpleEntry<K,V> entryFor(K k, V v) {
5410	–	return new AbstractMap.SimpleEntry<K,V>(k, v);
5411	–	}
5412	–
5413	–	// Unsafe mechanics
5414	–	private static final sun.misc.Unsafe U;
5415	–	private static final long PENDING;
5416	–	static {
5417	–	try {
5418	–	U = sun.misc.Unsafe.getUnsafe();
5419	–	PENDING = U.objectFieldOffset
5420	–	(BulkTask.class.getDeclaredField("pending"));
5421	–	} catch (Exception e) {
5422	–	throw new Error(e);
5423	–	}
5424	–	}
5425	–	}
5426	–
5427	–	/**
5428	–	* Base class for non-reductive actions
5429	–	*/
5430	–	@SuppressWarnings("serial") static abstract class BulkAction<K,V,R> extends BulkTask<K,V,R> {
5431	–	BulkAction<K,V,?> nextTask;
5432	–	BulkAction(ConcurrentHashMap<K,V> map, BulkTask<K,V,?> parent,
5433	–	int batch, BulkAction<K,V,?> nextTask) {
5434	–	super(map, parent, batch);
5435	–	this.nextTask = nextTask;
5436	–	}
5437	–
5438	–	/**
5439	–	* Try to complete task and upward parents. Upon hitting
5440	–	* non-completed parent, if a non-FJ task, try to help out the
5441	–	* computation.
5442	–	*/
5443	–	final void tryComplete(BulkAction<K,V,?> subtasks) {
5444	–	BulkTask<K,V,?> a = this, s = a;
5445	–	for (int c;;) {
5446	–	if ((c = a.pending) == 0) {
5447	–	if ((a = (s = a).parent) == null) {
5448	–	s.quietlyComplete();
5449	–	break;
5450	–	}
5451	–	}
5452	–	else if (a.casPending(c, c - 1)) {
5453	–	if (subtasks != null && !inForkJoinPool()) {
5454	–	while ((s = a.parent) != null)
5455	–	a = s;
5456	–	while (!a.isDone()) {
5457	–	BulkAction<K,V,?> next = subtasks.nextTask;
5458	–	if (subtasks.tryUnfork())
5459	–	subtasks.exec();
5460	–	if ((subtasks = next) == null)
5461	–	break;
5462	–	}
5463	–	}
5464	–	break;
5465	–	}
5466	–	}
5467	–	}
5468	–
5469	–	}
5470	–
5550		/*
5551		* Task classes. Coded in a regular but ugly format/style to
5552		* simplify checks that each variant differs in the right way from
5553	<	* others.
5553	>	* others. The null screenings exist because compilers cannot tell
5554	>	* that we've already null-checked task arguments, so we force
5555	>	* simplest hoisted bypass to help avoid convoluted traps.
5556		*/
5557
5558		@SuppressWarnings("serial") static final class ForEachKeyTask<K,V>
5559	<	extends BulkAction<K,V,Void> {
5560	<	final Action<K> action;
5559	>	extends Traverser<K,V,Void> {
5560	>	final Consumer<? super K> action;
5561		ForEachKeyTask
5562	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
5563	<	ForEachKeyTask<K,V> nextTask,
5564	<	Action<K> action) {
5484	<	super(m, p, b, nextTask);
5562	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
5563	>	Consumer<? super K> action) {
5564	>	super(m, p, b);
5565		this.action = action;
5566		}
5567	<	@SuppressWarnings("unchecked") public final boolean exec() {
5568	<	final Action<K> action = this.action;
5569	<	if (action == null)
5570	<	return abortOnNullFunction();
5571	<	ForEachKeyTask<K,V> subtasks = null;
5492	<	try {
5493	<	int b = batch(), c;
5494	<	while (b > 1 && baseIndex != baseLimit) {
5495	<	do {} while (!casPending(c = pending, c+1));
5496	<	(subtasks = new ForEachKeyTask<K,V>
5497	<	(map, this, b >>>= 1, subtasks, action)).fork();
5498	<	}
5567	>	public final void compute() {
5568	>	final Consumer<? super K> action;
5569	>	if ((action = this.action) != null) {
5570	>	for (int b; (b = preSplit()) > 0;)
5571	>	new ForEachKeyTask<K,V>(map, this, b, action).fork();
5572		while (advance() != null)
5573	<	action.apply((K)nextKey);
5574	<	} catch (Throwable ex) {
5502	<	return tryCompleteComputation(ex);
5573	>	action.accept(nextKey);
5574	>	propagateCompletion();
5575		}
5504	–	tryComplete(subtasks);
5505	–	return false;
5576		}
5577		}
5578
5579		@SuppressWarnings("serial") static final class ForEachValueTask<K,V>
5580	<	extends BulkAction<K,V,Void> {
5581	<	final Action<V> action;
5580	>	extends Traverser<K,V,Void> {
5581	>	final Consumer<? super V> action;
5582		ForEachValueTask
5583	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
5584	<	ForEachValueTask<K,V> nextTask,
5585	<	Action<V> action) {
5516	<	super(m, p, b, nextTask);
5583	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
5584	>	Consumer<? super V> action) {
5585	>	super(m, p, b);
5586		this.action = action;
5587		}
5588	<	@SuppressWarnings("unchecked") public final boolean exec() {
5589	<	final Action<V> action = this.action;
5590	<	if (action == null)
5591	<	return abortOnNullFunction();
5592	<	ForEachValueTask<K,V> subtasks = null;
5593	<	try {
5525	<	int b = batch(), c;
5526	<	while (b > 1 && baseIndex != baseLimit) {
5527	<	do {} while (!casPending(c = pending, c+1));
5528	<	(subtasks = new ForEachValueTask<K,V>
5529	<	(map, this, b >>>= 1, subtasks, action)).fork();
5530	<	}
5531	<	Object v;
5588	>	public final void compute() {
5589	>	final Consumer<? super V> action;
5590	>	if ((action = this.action) != null) {
5591	>	for (int b; (b = preSplit()) > 0;)
5592	>	new ForEachValueTask<K,V>(map, this, b, action).fork();
5593	>	V v;
5594		while ((v = advance()) != null)
5595	<	action.apply((V)v);
5596	<	} catch (Throwable ex) {
5535	<	return tryCompleteComputation(ex);
5595	>	action.accept(v);
5596	>	propagateCompletion();
5597		}
5537	–	tryComplete(subtasks);
5538	–	return false;
5598		}
5599		}
5600
5601		@SuppressWarnings("serial") static final class ForEachEntryTask<K,V>
5602	<	extends BulkAction<K,V,Void> {
5603	<	final Action<Entry<K,V>> action;
5602	>	extends Traverser<K,V,Void> {
5603	>	final Consumer<? super Entry<K,V>> action;
5604		ForEachEntryTask
5605	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
5606	<	ForEachEntryTask<K,V> nextTask,
5607	<	Action<Entry<K,V>> action) {
5549	<	super(m, p, b, nextTask);
5605	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
5606	>	Consumer<? super Entry<K,V>> action) {
5607	>	super(m, p, b);
5608		this.action = action;
5609		}
5610	<	@SuppressWarnings("unchecked") public final boolean exec() {
5611	<	final Action<Entry<K,V>> action = this.action;
5612	<	if (action == null)
5613	<	return abortOnNullFunction();
5614	<	ForEachEntryTask<K,V> subtasks = null;
5615	<	try {
5558	<	int b = batch(), c;
5559	<	while (b > 1 && baseIndex != baseLimit) {
5560	<	do {} while (!casPending(c = pending, c+1));
5561	<	(subtasks = new ForEachEntryTask<K,V>
5562	<	(map, this, b >>>= 1, subtasks, action)).fork();
5563	<	}
5564	<	Object v;
5610	>	public final void compute() {
5611	>	final Consumer<? super Entry<K,V>> action;
5612	>	if ((action = this.action) != null) {
5613	>	for (int b; (b = preSplit()) > 0;)
5614	>	new ForEachEntryTask<K,V>(map, this, b, action).fork();
5615	>	V v;
5616		while ((v = advance()) != null)
5617	<	action.apply(entryFor((K)nextKey, (V)v));
5618	<	} catch (Throwable ex) {
5568	<	return tryCompleteComputation(ex);
5617	>	action.accept(entryFor(nextKey, v));
5618	>	propagateCompletion();
5619		}
5570	–	tryComplete(subtasks);
5571	–	return false;
5620		}
5621		}
5622
5623		@SuppressWarnings("serial") static final class ForEachMappingTask<K,V>
5624	<	extends BulkAction<K,V,Void> {
5625	<	final BiAction<K,V> action;
5624	>	extends Traverser<K,V,Void> {
5625	>	final BiConsumer<? super K, ? super V> action;
5626		ForEachMappingTask
5627	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
5628	<	ForEachMappingTask<K,V> nextTask,
5629	<	BiAction<K,V> action) {
5582	<	super(m, p, b, nextTask);
5627	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
5628	>	BiConsumer<? super K,? super V> action) {
5629	>	super(m, p, b);
5630		this.action = action;
5631		}
5632	<	@SuppressWarnings("unchecked") public final boolean exec() {
5633	<	final BiAction<K,V> action = this.action;
5634	<	if (action == null)
5635	<	return abortOnNullFunction();
5636	<	ForEachMappingTask<K,V> subtasks = null;
5637	<	try {
5591	<	int b = batch(), c;
5592	<	while (b > 1 && baseIndex != baseLimit) {
5593	<	do {} while (!casPending(c = pending, c+1));
5594	<	(subtasks = new ForEachMappingTask<K,V>
5595	<	(map, this, b >>>= 1, subtasks, action)).fork();
5596	<	}
5597	<	Object v;
5632	>	public final void compute() {
5633	>	final BiConsumer<? super K, ? super V> action;
5634	>	if ((action = this.action) != null) {
5635	>	for (int b; (b = preSplit()) > 0;)
5636	>	new ForEachMappingTask<K,V>(map, this, b, action).fork();
5637	>	V v;
5638		while ((v = advance()) != null)
5639	<	action.apply((K)nextKey, (V)v);
5640	<	} catch (Throwable ex) {
5601	<	return tryCompleteComputation(ex);
5639	>	action.accept(nextKey, v);
5640	>	propagateCompletion();
5641		}
5603	–	tryComplete(subtasks);
5604	–	return false;
5642		}
5643		}
5644
5645		@SuppressWarnings("serial") static final class ForEachTransformedKeyTask<K,V,U>
5646	<	extends BulkAction<K,V,Void> {
5647	<	final Fun<? super K, ? extends U> transformer;
5648	<	final Action<U> action;
5646	>	extends Traverser<K,V,Void> {
5647	>	final Function<? super K, ? extends U> transformer;
5648	>	final Consumer<? super U> action;
5649		ForEachTransformedKeyTask
5650	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
5651	<	ForEachTransformedKeyTask<K,V,U> nextTask,
5652	<	Fun<? super K, ? extends U> transformer,
5653	<	Action<U> action) {
5654	<	super(m, p, b, nextTask);
5655	<	this.transformer = transformer;
5656	<	this.action = action;
5657	<
5658	<	}
5659	<	@SuppressWarnings("unchecked") public final boolean exec() {
5660	<	final Fun<? super K, ? extends U> transformer =
5661	<	this.transformer;
5662	<	final Action<U> action = this.action;
5626	<	if (transformer == null || action == null)
5627	<	return abortOnNullFunction();
5628	<	ForEachTransformedKeyTask<K,V,U> subtasks = null;
5629	<	try {
5630	<	int b = batch(), c;
5631	<	while (b > 1 && baseIndex != baseLimit) {
5632	<	do {} while (!casPending(c = pending, c+1));
5633	<	(subtasks = new ForEachTransformedKeyTask<K,V,U>
5634	<	(map, this, b >>>= 1, subtasks, transformer, action)).fork();
5635	<	}
5650	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
5651	>	Function<? super K, ? extends U> transformer, Consumer<? super U> action) {
5652	>	super(m, p, b);
5653	>	this.transformer = transformer; this.action = action;
5654	>	}
5655	>	public final void compute() {
5656	>	final Function<? super K, ? extends U> transformer;
5657	>	final Consumer<? super U> action;
5658	>	if ((transformer = this.transformer) != null &&
5659	>	(action = this.action) != null) {
5660	>	for (int b; (b = preSplit()) > 0;)
5661	>	new ForEachTransformedKeyTask<K,V,U>
5662	>	(map, this, b, transformer, action).fork();
5663		U u;
5664		while (advance() != null) {
5665	<	if ((u = transformer.apply((K)nextKey)) != null)
5666	<	action.apply(u);
5665	>	if ((u = transformer.apply(nextKey)) != null)
5666	>	action.accept(u);
5667		}
5668	<	} catch (Throwable ex) {
5642	<	return tryCompleteComputation(ex);
5668	>	propagateCompletion();
5669		}
5644	–	tryComplete(subtasks);
5645	–	return false;
5670		}
5671		}
5672
5673		@SuppressWarnings("serial") static final class ForEachTransformedValueTask<K,V,U>
5674	<	extends BulkAction<K,V,Void> {
5675	<	final Fun<? super V, ? extends U> transformer;
5676	<	final Action<U> action;
5674	>	extends Traverser<K,V,Void> {
5675	>	final Function<? super V, ? extends U> transformer;
5676	>	final Consumer<? super U> action;
5677		ForEachTransformedValueTask
5678	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
5679	<	ForEachTransformedValueTask<K,V,U> nextTask,
5680	<	Fun<? super V, ? extends U> transformer,
5681	<	Action<U> action) {
5682	<	super(m, p, b, nextTask);
5683	<	this.transformer = transformer;
5684	<	this.action = action;
5685	<
5686	<	}
5687	<	@SuppressWarnings("unchecked") public final boolean exec() {
5688	<	final Fun<? super V, ? extends U> transformer =
5689	<	this.transformer;
5690	<	final Action<U> action = this.action;
5691	<	if (transformer == null || action == null)
5668	<	return abortOnNullFunction();
5669	<	ForEachTransformedValueTask<K,V,U> subtasks = null;
5670	<	try {
5671	<	int b = batch(), c;
5672	<	while (b > 1 && baseIndex != baseLimit) {
5673	<	do {} while (!casPending(c = pending, c+1));
5674	<	(subtasks = new ForEachTransformedValueTask<K,V,U>
5675	<	(map, this, b >>>= 1, subtasks, transformer, action)).fork();
5676	<	}
5677	<	Object v; U u;
5678	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
5679	>	Function<? super V, ? extends U> transformer, Consumer<? super U> action) {
5680	>	super(m, p, b);
5681	>	this.transformer = transformer; this.action = action;
5682	>	}
5683	>	public final void compute() {
5684	>	final Function<? super V, ? extends U> transformer;
5685	>	final Consumer<? super U> action;
5686	>	if ((transformer = this.transformer) != null &&
5687	>	(action = this.action) != null) {
5688	>	for (int b; (b = preSplit()) > 0;)
5689	>	new ForEachTransformedValueTask<K,V,U>
5690	>	(map, this, b, transformer, action).fork();
5691	>	V v; U u;
5692		while ((v = advance()) != null) {
5693	<	if ((u = transformer.apply((V)v)) != null)
5694	<	action.apply(u);
5693	>	if ((u = transformer.apply(v)) != null)
5694	>	action.accept(u);
5695		}
5696	<	} catch (Throwable ex) {
5683	<	return tryCompleteComputation(ex);
5696	>	propagateCompletion();
5697		}
5685	–	tryComplete(subtasks);
5686	–	return false;
5698		}
5699		}
5700
5701		@SuppressWarnings("serial") static final class ForEachTransformedEntryTask<K,V,U>
5702	<	extends BulkAction<K,V,Void> {
5703	<	final Fun<Map.Entry<K,V>, ? extends U> transformer;
5704	<	final Action<U> action;
5702	>	extends Traverser<K,V,Void> {
5703	>	final Function<Map.Entry<K,V>, ? extends U> transformer;
5704	>	final Consumer<? super U> action;
5705		ForEachTransformedEntryTask
5706	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
5707	<	ForEachTransformedEntryTask<K,V,U> nextTask,
5708	<	Fun<Map.Entry<K,V>, ? extends U> transformer,
5709	<	Action<U> action) {
5710	<	super(m, p, b, nextTask);
5711	<	this.transformer = transformer;
5712	<	this.action = action;
5713	<
5714	<	}
5715	<	@SuppressWarnings("unchecked") public final boolean exec() {
5716	<	final Fun<Map.Entry<K,V>, ? extends U> transformer =
5717	<	this.transformer;
5718	<	final Action<U> action = this.action;
5719	<	if (transformer == null || action == null)
5709	<	return abortOnNullFunction();
5710	<	ForEachTransformedEntryTask<K,V,U> subtasks = null;
5711	<	try {
5712	<	int b = batch(), c;
5713	<	while (b > 1 && baseIndex != baseLimit) {
5714	<	do {} while (!casPending(c = pending, c+1));
5715	<	(subtasks = new ForEachTransformedEntryTask<K,V,U>
5716	<	(map, this, b >>>= 1, subtasks, transformer, action)).fork();
5717	<	}
5718	<	Object v; U u;
5706	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
5707	>	Function<Map.Entry<K,V>, ? extends U> transformer, Consumer<? super U> action) {
5708	>	super(m, p, b);
5709	>	this.transformer = transformer; this.action = action;
5710	>	}
5711	>	public final void compute() {
5712	>	final Function<Map.Entry<K,V>, ? extends U> transformer;
5713	>	final Consumer<? super U> action;
5714	>	if ((transformer = this.transformer) != null &&
5715	>	(action = this.action) != null) {
5716	>	for (int b; (b = preSplit()) > 0;)
5717	>	new ForEachTransformedEntryTask<K,V,U>
5718	>	(map, this, b, transformer, action).fork();
5719	>	V v; U u;
5720		while ((v = advance()) != null) {
5721	<	if ((u = transformer.apply(entryFor((K)nextKey, (V)v))) != null)
5722	<	action.apply(u);
5721	>	if ((u = transformer.apply(entryFor(nextKey,
5722	>	v))) != null)
5723	>	action.accept(u);
5724		}
5725	<	} catch (Throwable ex) {
5724	<	return tryCompleteComputation(ex);
5725	>	propagateCompletion();
5726		}
5726	–	tryComplete(subtasks);
5727	–	return false;
5727		}
5728		}
5729
5730		@SuppressWarnings("serial") static final class ForEachTransformedMappingTask<K,V,U>
5731	<	extends BulkAction<K,V,Void> {
5732	<	final BiFun<? super K, ? super V, ? extends U> transformer;
5733	<	final Action<U> action;
5731	>	extends Traverser<K,V,Void> {
5732	>	final BiFunction<? super K, ? super V, ? extends U> transformer;
5733	>	final Consumer<? super U> action;
5734		ForEachTransformedMappingTask
5735	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
5736	<	ForEachTransformedMappingTask<K,V,U> nextTask,
5737	<	BiFun<? super K, ? super V, ? extends U> transformer,
5738	<	Action<U> action) {
5739	<	super(m, p, b, nextTask);
5740	<	this.transformer = transformer;
5741	<	this.action = action;
5742	<
5743	<	}
5744	<	@SuppressWarnings("unchecked") public final boolean exec() {
5745	<	final BiFun<? super K, ? super V, ? extends U> transformer =
5746	<	this.transformer;
5747	<	final Action<U> action = this.action;
5748	<	if (transformer == null || action == null)
5749	<	return abortOnNullFunction();
5751	<	ForEachTransformedMappingTask<K,V,U> subtasks = null;
5752	<	try {
5753	<	int b = batch(), c;
5754	<	while (b > 1 && baseIndex != baseLimit) {
5755	<	do {} while (!casPending(c = pending, c+1));
5756	<	(subtasks = new ForEachTransformedMappingTask<K,V,U>
5757	<	(map, this, b >>>= 1, subtasks, transformer, action)).fork();
5758	<	}
5759	<	Object v; U u;
5735	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
5736	>	BiFunction<? super K, ? super V, ? extends U> transformer,
5737	>	Consumer<? super U> action) {
5738	>	super(m, p, b);
5739	>	this.transformer = transformer; this.action = action;
5740	>	}
5741	>	public final void compute() {
5742	>	final BiFunction<? super K, ? super V, ? extends U> transformer;
5743	>	final Consumer<? super U> action;
5744	>	if ((transformer = this.transformer) != null &&
5745	>	(action = this.action) != null) {
5746	>	for (int b; (b = preSplit()) > 0;)
5747	>	new ForEachTransformedMappingTask<K,V,U>
5748	>	(map, this, b, transformer, action).fork();
5749	>	V v; U u;
5750		while ((v = advance()) != null) {
5751	<	if ((u = transformer.apply((K)nextKey, (V)v)) != null)
5752	<	action.apply(u);
5751	>	if ((u = transformer.apply(nextKey, v)) != null)
5752	>	action.accept(u);
5753		}
5754	<	} catch (Throwable ex) {
5765	<	return tryCompleteComputation(ex);
5754	>	propagateCompletion();
5755		}
5767	–	tryComplete(subtasks);
5768	–	return false;
5756		}
5757		}
5758
5759		@SuppressWarnings("serial") static final class SearchKeysTask<K,V,U>
5760	<	extends BulkAction<K,V,U> {
5761	<	final Fun<? super K, ? extends U> searchFunction;
5760	>	extends Traverser<K,V,U> {
5761	>	final Function<? super K, ? extends U> searchFunction;
5762		final AtomicReference<U> result;
5763		SearchKeysTask
5764	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
5765	<	SearchKeysTask<K,V,U> nextTask,
5779	<	Fun<? super K, ? extends U> searchFunction,
5764	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
5765	>	Function<? super K, ? extends U> searchFunction,
5766		AtomicReference<U> result) {
5767	<	super(m, p, b, nextTask);
5767	>	super(m, p, b);
5768		this.searchFunction = searchFunction; this.result = result;
5769		}
5770	<	@SuppressWarnings("unchecked") public final boolean exec() {
5771	<	AtomicReference<U> result = this.result;
5772	<	final Fun<? super K, ? extends U> searchFunction =
5773	<	this.searchFunction;
5774	<	if (searchFunction == null || result == null)
5775	<	return abortOnNullFunction();
5776	<	SearchKeysTask<K,V,U> subtasks = null;
5777	<	try {
5778	<	int b = batch(), c;
5779	<	while (b > 1 && baseIndex != baseLimit && result.get() == null) {
5780	<	do {} while (!casPending(c = pending, c+1));
5781	<	(subtasks = new SearchKeysTask<K,V,U>
5782	<	(map, this, b >>>= 1, subtasks, searchFunction, result)).fork();
5770	>	public final U getRawResult() { return result.get(); }
5771	>	public final void compute() {
5772	>	final Function<? super K, ? extends U> searchFunction;
5773	>	final AtomicReference<U> result;
5774	>	if ((searchFunction = this.searchFunction) != null &&
5775	>	(result = this.result) != null) {
5776	>	for (int b;;) {
5777	>	if (result.get() != null)
5778	>	return;
5779	>	if ((b = preSplit()) <= 0)
5780	>	break;
5781	>	new SearchKeysTask<K,V,U>
5782	>	(map, this, b, searchFunction, result).fork();
5783		}
5784	<	U u;
5785	<	while (result.get() == null && advance() != null) {
5786	<	if ((u = searchFunction.apply((K)nextKey)) != null) {
5784	>	while (result.get() == null) {
5785	>	U u;
5786	>	if (advance() == null) {
5787	>	propagateCompletion();
5788	>	break;
5789	>	}
5790	>	if ((u = searchFunction.apply(nextKey)) != null) {
5791		if (result.compareAndSet(null, u))
5792	<	tryCompleteComputation(null);
5792	>	quietlyCompleteRoot();
5793		break;
5794		}
5795		}
5806	–	} catch (Throwable ex) {
5807	–	return tryCompleteComputation(ex);
5796		}
5809	–	tryComplete(subtasks);
5810	–	return false;
5797		}
5812	–	public final U getRawResult() { return result.get(); }
5798		}
5799
5800		@SuppressWarnings("serial") static final class SearchValuesTask<K,V,U>
5801	<	extends BulkAction<K,V,U> {
5802	<	final Fun<? super V, ? extends U> searchFunction;
5801	>	extends Traverser<K,V,U> {
5802	>	final Function<? super V, ? extends U> searchFunction;
5803		final AtomicReference<U> result;
5804		SearchValuesTask
5805	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
5806	<	SearchValuesTask<K,V,U> nextTask,
5822	<	Fun<? super V, ? extends U> searchFunction,
5805	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
5806	>	Function<? super V, ? extends U> searchFunction,
5807		AtomicReference<U> result) {
5808	<	super(m, p, b, nextTask);
5808	>	super(m, p, b);
5809		this.searchFunction = searchFunction; this.result = result;
5810		}
5811	<	@SuppressWarnings("unchecked") public final boolean exec() {
5812	<	AtomicReference<U> result = this.result;
5813	<	final Fun<? super V, ? extends U> searchFunction =
5814	<	this.searchFunction;
5815	<	if (searchFunction == null || result == null)
5816	<	return abortOnNullFunction();
5817	<	SearchValuesTask<K,V,U> subtasks = null;
5818	<	try {
5819	<	int b = batch(), c;
5820	<	while (b > 1 && baseIndex != baseLimit && result.get() == null) {
5821	<	do {} while (!casPending(c = pending, c+1));
5822	<	(subtasks = new SearchValuesTask<K,V,U>
5823	<	(map, this, b >>>= 1, subtasks, searchFunction, result)).fork();
5824	<	}
5825	<	Object v; U u;
5826	<	while (result.get() == null && (v = advance()) != null) {
5827	<	if ((u = searchFunction.apply((V)v)) != null) {
5811	>	public final U getRawResult() { return result.get(); }
5812	>	public final void compute() {
5813	>	final Function<? super V, ? extends U> searchFunction;
5814	>	final AtomicReference<U> result;
5815	>	if ((searchFunction = this.searchFunction) != null &&
5816	>	(result = this.result) != null) {
5817	>	for (int b;;) {
5818	>	if (result.get() != null)
5819	>	return;
5820	>	if ((b = preSplit()) <= 0)
5821	>	break;
5822	>	new SearchValuesTask<K,V,U>
5823	>	(map, this, b, searchFunction, result).fork();
5824	>	}
5825	>	while (result.get() == null) {
5826	>	V v; U u;
5827	>	if ((v = advance()) == null) {
5828	>	propagateCompletion();
5829	>	break;
5830	>	}
5831	>	if ((u = searchFunction.apply(v)) != null) {
5832		if (result.compareAndSet(null, u))
5833	<	tryCompleteComputation(null);
5833	>	quietlyCompleteRoot();
5834		break;
5835		}
5836		}
5849	–	} catch (Throwable ex) {
5850	–	return tryCompleteComputation(ex);
5837		}
5852	–	tryComplete(subtasks);
5853	–	return false;
5838		}
5855	–	public final U getRawResult() { return result.get(); }
5839		}
5840
5841		@SuppressWarnings("serial") static final class SearchEntriesTask<K,V,U>
5842	<	extends BulkAction<K,V,U> {
5843	<	final Fun<Entry<K,V>, ? extends U> searchFunction;
5842	>	extends Traverser<K,V,U> {
5843	>	final Function<Entry<K,V>, ? extends U> searchFunction;
5844		final AtomicReference<U> result;
5845		SearchEntriesTask
5846	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
5847	<	SearchEntriesTask<K,V,U> nextTask,
5865	<	Fun<Entry<K,V>, ? extends U> searchFunction,
5846	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
5847	>	Function<Entry<K,V>, ? extends U> searchFunction,
5848		AtomicReference<U> result) {
5849	<	super(m, p, b, nextTask);
5849	>	super(m, p, b);
5850		this.searchFunction = searchFunction; this.result = result;
5851		}
5852	<	@SuppressWarnings("unchecked") public final boolean exec() {
5853	<	AtomicReference<U> result = this.result;
5854	<	final Fun<Entry<K,V>, ? extends U> searchFunction =
5855	<	this.searchFunction;
5856	<	if (searchFunction == null || result == null)
5857	<	return abortOnNullFunction();
5858	<	SearchEntriesTask<K,V,U> subtasks = null;
5859	<	try {
5860	<	int b = batch(), c;
5861	<	while (b > 1 && baseIndex != baseLimit && result.get() == null) {
5862	<	do {} while (!casPending(c = pending, c+1));
5863	<	(subtasks = new SearchEntriesTask<K,V,U>
5864	<	(map, this, b >>>= 1, subtasks, searchFunction, result)).fork();
5865	<	}
5866	<	Object v; U u;
5867	<	while (result.get() == null && (v = advance()) != null) {
5868	<	if ((u = searchFunction.apply(entryFor((K)nextKey, (V)v))) != null) {
5869	<	if (result.compareAndSet(null, u))
5888	<	tryCompleteComputation(null);
5852	>	public final U getRawResult() { return result.get(); }
5853	>	public final void compute() {
5854	>	final Function<Entry<K,V>, ? extends U> searchFunction;
5855	>	final AtomicReference<U> result;
5856	>	if ((searchFunction = this.searchFunction) != null &&
5857	>	(result = this.result) != null) {
5858	>	for (int b;;) {
5859	>	if (result.get() != null)
5860	>	return;
5861	>	if ((b = preSplit()) <= 0)
5862	>	break;
5863	>	new SearchEntriesTask<K,V,U>
5864	>	(map, this, b, searchFunction, result).fork();
5865	>	}
5866	>	while (result.get() == null) {
5867	>	V v; U u;
5868	>	if ((v = advance()) == null) {
5869	>	propagateCompletion();
5870		break;
5871		}
5872	+	if ((u = searchFunction.apply(entryFor(nextKey,
5873	+	v))) != null) {
5874	+	if (result.compareAndSet(null, u))
5875	+	quietlyCompleteRoot();
5876	+	return;
5877	+	}
5878		}
5892	–	} catch (Throwable ex) {
5893	–	return tryCompleteComputation(ex);
5879		}
5895	–	tryComplete(subtasks);
5896	–	return false;
5880		}
5898	–	public final U getRawResult() { return result.get(); }
5881		}
5882
5883		@SuppressWarnings("serial") static final class SearchMappingsTask<K,V,U>
5884	<	extends BulkAction<K,V,U> {
5885	<	final BiFun<? super K, ? super V, ? extends U> searchFunction;
5884	>	extends Traverser<K,V,U> {
5885	>	final BiFunction<? super K, ? super V, ? extends U> searchFunction;
5886		final AtomicReference<U> result;
5887		SearchMappingsTask
5888	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
5889	<	SearchMappingsTask<K,V,U> nextTask,
5908	<	BiFun<? super K, ? super V, ? extends U> searchFunction,
5888	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
5889	>	BiFunction<? super K, ? super V, ? extends U> searchFunction,
5890		AtomicReference<U> result) {
5891	<	super(m, p, b, nextTask);
5891	>	super(m, p, b);
5892		this.searchFunction = searchFunction; this.result = result;
5893		}
5894	<	@SuppressWarnings("unchecked") public final boolean exec() {
5895	<	AtomicReference<U> result = this.result;
5896	<	final BiFun<? super K, ? super V, ? extends U> searchFunction =
5897	<	this.searchFunction;
5898	<	if (searchFunction == null || result == null)
5899	<	return abortOnNullFunction();
5900	<	SearchMappingsTask<K,V,U> subtasks = null;
5901	<	try {
5902	<	int b = batch(), c;
5903	<	while (b > 1 && baseIndex != baseLimit && result.get() == null) {
5904	<	do {} while (!casPending(c = pending, c+1));
5905	<	(subtasks = new SearchMappingsTask<K,V,U>
5906	<	(map, this, b >>>= 1, subtasks, searchFunction, result)).fork();
5907	<	}
5908	<	Object v; U u;
5909	<	while (result.get() == null && (v = advance()) != null) {
5910	<	if ((u = searchFunction.apply((K)nextKey, (V)v)) != null) {
5894	>	public final U getRawResult() { return result.get(); }
5895	>	public final void compute() {
5896	>	final BiFunction<? super K, ? super V, ? extends U> searchFunction;
5897	>	final AtomicReference<U> result;
5898	>	if ((searchFunction = this.searchFunction) != null &&
5899	>	(result = this.result) != null) {
5900	>	for (int b;;) {
5901	>	if (result.get() != null)
5902	>	return;
5903	>	if ((b = preSplit()) <= 0)
5904	>	break;
5905	>	new SearchMappingsTask<K,V,U>
5906	>	(map, this, b, searchFunction, result).fork();
5907	>	}
5908	>	while (result.get() == null) {
5909	>	V v; U u;
5910	>	if ((v = advance()) == null) {
5911	>	propagateCompletion();
5912	>	break;
5913	>	}
5914	>	if ((u = searchFunction.apply(nextKey, v)) != null) {
5915		if (result.compareAndSet(null, u))
5916	<	tryCompleteComputation(null);
5916	>	quietlyCompleteRoot();
5917		break;
5918		}
5919		}
5935	–	} catch (Throwable ex) {
5936	–	return tryCompleteComputation(ex);
5920		}
5938	–	tryComplete(subtasks);
5939	–	return false;
5921		}
5941	–	public final U getRawResult() { return result.get(); }
5922		}
5923
5924		@SuppressWarnings("serial") static final class ReduceKeysTask<K,V>
5925	<	extends BulkTask<K,V,K> {
5926	<	final BiFun<? super K, ? super K, ? extends K> reducer;
5925	>	extends Traverser<K,V,K> {
5926	>	final BiFunction<? super K, ? super K, ? extends K> reducer;
5927		K result;
5928		ReduceKeysTask<K,V> rights, nextRight;
5929		ReduceKeysTask
5930	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
5930	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
5931		ReduceKeysTask<K,V> nextRight,
5932	<	BiFun<? super K, ? super K, ? extends K> reducer) {
5932	>	BiFunction<? super K, ? super K, ? extends K> reducer) {
5933		super(m, p, b); this.nextRight = nextRight;
5934		this.reducer = reducer;
5935		}
5936	<	@SuppressWarnings("unchecked") public final boolean exec() {
5937	<	final BiFun<? super K, ? super K, ? extends K> reducer =
5938	<	this.reducer;
5939	<	if (reducer == null)
5940	<	return abortOnNullFunction();
5961	<	try {
5962	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
5963	<	do {} while (!casPending(c = pending, c+1));
5936	>	public final K getRawResult() { return result; }
5937	>	@SuppressWarnings("unchecked") public final void compute() {
5938	>	final BiFunction<? super K, ? super K, ? extends K> reducer;
5939	>	if ((reducer = this.reducer) != null) {
5940	>	for (int b; (b = preSplit()) > 0;)
5941		(rights = new ReduceKeysTask<K,V>
5942	<	(map, this, b >>>= 1, rights, reducer)).fork();
5966	<	}
5942	>	(map, this, b, rights, reducer)).fork();
5943		K r = null;
5944		while (advance() != null) {
5945	<	K u = (K)nextKey;
5946	<	r = (r == null) ? u : reducer.apply(r, u);
5945	>	K u = nextKey;
5946	>	r = (r == null) ? u : u == null ? r : reducer.apply(r, u);
5947		}
5948		result = r;
5949	<	for (ReduceKeysTask<K,V> t = this, s;;) {
5950	<	int c; BulkTask<K,V,?> par; K tr, sr;
5951	<	if ((c = t.pending) == 0) {
5952	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
5953	<	if ((sr = s.result) != null)
5954	<	t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr);
5955	<	}
5956	<	if ((par = t.parent) == null ||
5957	<	!(par instanceof ReduceKeysTask)) {
5958	<	t.quietlyComplete();
5959	<	break;
5984	<	}
5985	<	t = (ReduceKeysTask<K,V>)par;
5949	>	CountedCompleter<?> c;
5950	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
5951	>	ReduceKeysTask<K,V>
5952	>	t = (ReduceKeysTask<K,V>)c,
5953	>	s = t.rights;
5954	>	while (s != null) {
5955	>	K tr, sr;
5956	>	if ((sr = s.result) != null)
5957	>	t.result = (((tr = t.result) == null) ? sr :
5958	>	reducer.apply(tr, sr));
5959	>	s = t.rights = s.nextRight;
5960		}
5987	–	else if (t.casPending(c, c - 1))
5988	–	break;
5961		}
5990	–	} catch (Throwable ex) {
5991	–	return tryCompleteComputation(ex);
5962		}
5993	–	ReduceKeysTask<K,V> s = rights;
5994	–	if (s != null && !inForkJoinPool()) {
5995	–	do  {
5996	–	if (s.tryUnfork())
5997	–	s.exec();
5998	–	} while ((s = s.nextRight) != null);
5999	–	}
6000	–	return false;
5963		}
6002	–	public final K getRawResult() { return result; }
5964		}
5965
5966		@SuppressWarnings("serial") static final class ReduceValuesTask<K,V>
5967	<	extends BulkTask<K,V,V> {
5968	<	final BiFun<? super V, ? super V, ? extends V> reducer;
5967	>	extends Traverser<K,V,V> {
5968	>	final BiFunction<? super V, ? super V, ? extends V> reducer;
5969		V result;
5970		ReduceValuesTask<K,V> rights, nextRight;
5971		ReduceValuesTask
5972	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
5972	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
5973		ReduceValuesTask<K,V> nextRight,
5974	<	BiFun<? super V, ? super V, ? extends V> reducer) {
5974	>	BiFunction<? super V, ? super V, ? extends V> reducer) {
5975		super(m, p, b); this.nextRight = nextRight;
5976		this.reducer = reducer;
5977		}
5978	<	@SuppressWarnings("unchecked") public final boolean exec() {
5979	<	final BiFun<? super V, ? super V, ? extends V> reducer =
5980	<	this.reducer;
5981	<	if (reducer == null)
5982	<	return abortOnNullFunction();
6022	<	try {
6023	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6024	<	do {} while (!casPending(c = pending, c+1));
5978	>	public final V getRawResult() { return result; }
5979	>	@SuppressWarnings("unchecked") public final void compute() {
5980	>	final BiFunction<? super V, ? super V, ? extends V> reducer;
5981	>	if ((reducer = this.reducer) != null) {
5982	>	for (int b; (b = preSplit()) > 0;)
5983		(rights = new ReduceValuesTask<K,V>
5984	<	(map, this, b >>>= 1, rights, reducer)).fork();
5985	<	}
5986	<	V r = null;
5987	<	Object v;
6030	<	while ((v = advance()) != null) {
6031	<	V u = (V)v;
6032	<	r = (r == null) ? u : reducer.apply(r, u);
6033	<	}
5984	>	(map, this, b, rights, reducer)).fork();
5985	>	V r = null, v;
5986	>	while ((v = advance()) != null)
5987	>	r = (r == null) ? v : reducer.apply(r, v);
5988		result = r;
5989	<	for (ReduceValuesTask<K,V> t = this, s;;) {
5990	<	int c; BulkTask<K,V,?> par; V tr, sr;
5991	<	if ((c = t.pending) == 0) {
5992	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
5993	<	if ((sr = s.result) != null)
5994	<	t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr);
5995	<	}
5996	<	if ((par = t.parent) == null ||
5997	<	!(par instanceof ReduceValuesTask)) {
5998	<	t.quietlyComplete();
5999	<	break;
6046	<	}
6047	<	t = (ReduceValuesTask<K,V>)par;
5989	>	CountedCompleter<?> c;
5990	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
5991	>	ReduceValuesTask<K,V>
5992	>	t = (ReduceValuesTask<K,V>)c,
5993	>	s = t.rights;
5994	>	while (s != null) {
5995	>	V tr, sr;
5996	>	if ((sr = s.result) != null)
5997	>	t.result = (((tr = t.result) == null) ? sr :
5998	>	reducer.apply(tr, sr));
5999	>	s = t.rights = s.nextRight;
6000		}
6049	–	else if (t.casPending(c, c - 1))
6050	–	break;
6001		}
6052	–	} catch (Throwable ex) {
6053	–	return tryCompleteComputation(ex);
6054	–	}
6055	–	ReduceValuesTask<K,V> s = rights;
6056	–	if (s != null && !inForkJoinPool()) {
6057	–	do  {
6058	–	if (s.tryUnfork())
6059	–	s.exec();
6060	–	} while ((s = s.nextRight) != null);
6002		}
6062	–	return false;
6003		}
6064	–	public final V getRawResult() { return result; }
6004		}
6005
6006		@SuppressWarnings("serial") static final class ReduceEntriesTask<K,V>
6007	<	extends BulkTask<K,V,Map.Entry<K,V>> {
6008	<	final BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer;
6007	>	extends Traverser<K,V,Map.Entry<K,V>> {
6008	>	final BiFunction<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer;
6009		Map.Entry<K,V> result;
6010		ReduceEntriesTask<K,V> rights, nextRight;
6011		ReduceEntriesTask
6012	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
6012	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
6013		ReduceEntriesTask<K,V> nextRight,
6014	<	BiFun<Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
6014	>	BiFunction<Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
6015		super(m, p, b); this.nextRight = nextRight;
6016		this.reducer = reducer;
6017		}
6018	<	@SuppressWarnings("unchecked") public final boolean exec() {
6019	<	final BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer =
6020	<	this.reducer;
6021	<	if (reducer == null)
6022	<	return abortOnNullFunction();
6084	<	try {
6085	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6086	<	do {} while (!casPending(c = pending, c+1));
6018	>	public final Map.Entry<K,V> getRawResult() { return result; }
6019	>	@SuppressWarnings("unchecked") public final void compute() {
6020	>	final BiFunction<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer;
6021	>	if ((reducer = this.reducer) != null) {
6022	>	for (int b; (b = preSplit()) > 0;)
6023		(rights = new ReduceEntriesTask<K,V>
6024	<	(map, this, b >>>= 1, rights, reducer)).fork();
6089	<	}
6024	>	(map, this, b, rights, reducer)).fork();
6025		Map.Entry<K,V> r = null;
6026	<	Object v;
6026	>	V v;
6027		while ((v = advance()) != null) {
6028	<	Map.Entry<K,V> u = entryFor((K)nextKey, (V)v);
6028	>	Map.Entry<K,V> u = entryFor(nextKey, v);
6029		r = (r == null) ? u : reducer.apply(r, u);
6030		}
6031		result = r;
6032	<	for (ReduceEntriesTask<K,V> t = this, s;;) {
6033	<	int c; BulkTask<K,V,?> par; Map.Entry<K,V> tr, sr;
6034	<	if ((c = t.pending) == 0) {
6035	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6036	<	if ((sr = s.result) != null)
6037	<	t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr);
6038	<	}
6039	<	if ((par = t.parent) == null ||
6040	<	!(par instanceof ReduceEntriesTask)) {
6041	<	t.quietlyComplete();
6042	<	break;
6108	<	}
6109	<	t = (ReduceEntriesTask<K,V>)par;
6032	>	CountedCompleter<?> c;
6033	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6034	>	ReduceEntriesTask<K,V>
6035	>	t = (ReduceEntriesTask<K,V>)c,
6036	>	s = t.rights;
6037	>	while (s != null) {
6038	>	Map.Entry<K,V> tr, sr;
6039	>	if ((sr = s.result) != null)
6040	>	t.result = (((tr = t.result) == null) ? sr :
6041	>	reducer.apply(tr, sr));
6042	>	s = t.rights = s.nextRight;
6043		}
6111	–	else if (t.casPending(c, c - 1))
6112	–	break;
6044		}
6114	–	} catch (Throwable ex) {
6115	–	return tryCompleteComputation(ex);
6116	–	}
6117	–	ReduceEntriesTask<K,V> s = rights;
6118	–	if (s != null && !inForkJoinPool()) {
6119	–	do  {
6120	–	if (s.tryUnfork())
6121	–	s.exec();
6122	–	} while ((s = s.nextRight) != null);
6045		}
6124	–	return false;
6046		}
6126	–	public final Map.Entry<K,V> getRawResult() { return result; }
6047		}
6048
6049		@SuppressWarnings("serial") static final class MapReduceKeysTask<K,V,U>
6050	<	extends BulkTask<K,V,U> {
6051	<	final Fun<? super K, ? extends U> transformer;
6052	<	final BiFun<? super U, ? super U, ? extends U> reducer;
6050	>	extends Traverser<K,V,U> {
6051	>	final Function<? super K, ? extends U> transformer;
6052	>	final BiFunction<? super U, ? super U, ? extends U> reducer;
6053		U result;
6054		MapReduceKeysTask<K,V,U> rights, nextRight;
6055		MapReduceKeysTask
6056	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
6056	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
6057		MapReduceKeysTask<K,V,U> nextRight,
6058	<	Fun<? super K, ? extends U> transformer,
6059	<	BiFun<? super U, ? super U, ? extends U> reducer) {
6058	>	Function<? super K, ? extends U> transformer,
6059	>	BiFunction<? super U, ? super U, ? extends U> reducer) {
6060		super(m, p, b); this.nextRight = nextRight;
6061		this.transformer = transformer;
6062		this.reducer = reducer;
6063		}
6064	<	@SuppressWarnings("unchecked") public final boolean exec() {
6065	<	final Fun<? super K, ? extends U> transformer =
6066	<	this.transformer;
6067	<	final BiFun<? super U, ? super U, ? extends U> reducer =
6068	<	this.reducer;
6069	<	if (transformer == null || reducer == null)
6070	<	return abortOnNullFunction();
6151	<	try {
6152	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6153	<	do {} while (!casPending(c = pending, c+1));
6064	>	public final U getRawResult() { return result; }
6065	>	@SuppressWarnings("unchecked") public final void compute() {
6066	>	final Function<? super K, ? extends U> transformer;
6067	>	final BiFunction<? super U, ? super U, ? extends U> reducer;
6068	>	if ((transformer = this.transformer) != null &&
6069	>	(reducer = this.reducer) != null) {
6070	>	for (int b; (b = preSplit()) > 0;)
6071		(rights = new MapReduceKeysTask<K,V,U>
6072	<	(map, this, b >>>= 1, rights, transformer, reducer)).fork();
6156	<	}
6072	>	(map, this, b, rights, transformer, reducer)).fork();
6073		U r = null, u;
6074		while (advance() != null) {
6075	<	if ((u = transformer.apply((K)nextKey)) != null)
6075	>	if ((u = transformer.apply(nextKey)) != null)
6076		r = (r == null) ? u : reducer.apply(r, u);
6077		}
6078		result = r;
6079	<	for (MapReduceKeysTask<K,V,U> t = this, s;;) {
6080	<	int c; BulkTask<K,V,?> par; U tr, sr;
6081	<	if ((c = t.pending) == 0) {
6082	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6083	<	if ((sr = s.result) != null)
6084	<	t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr);
6085	<	}
6086	<	if ((par = t.parent) == null ||
6087	<	!(par instanceof MapReduceKeysTask)) {
6088	<	t.quietlyComplete();
6089	<	break;
6174	<	}
6175	<	t = (MapReduceKeysTask<K,V,U>)par;
6079	>	CountedCompleter<?> c;
6080	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6081	>	MapReduceKeysTask<K,V,U>
6082	>	t = (MapReduceKeysTask<K,V,U>)c,
6083	>	s = t.rights;
6084	>	while (s != null) {
6085	>	U tr, sr;
6086	>	if ((sr = s.result) != null)
6087	>	t.result = (((tr = t.result) == null) ? sr :
6088	>	reducer.apply(tr, sr));
6089	>	s = t.rights = s.nextRight;
6090		}
6177	–	else if (t.casPending(c, c - 1))
6178	–	break;
6091		}
6180	–	} catch (Throwable ex) {
6181	–	return tryCompleteComputation(ex);
6092		}
6183	–	MapReduceKeysTask<K,V,U> s = rights;
6184	–	if (s != null && !inForkJoinPool()) {
6185	–	do  {
6186	–	if (s.tryUnfork())
6187	–	s.exec();
6188	–	} while ((s = s.nextRight) != null);
6189	–	}
6190	–	return false;
6093		}
6192	–	public final U getRawResult() { return result; }
6094		}
6095
6096		@SuppressWarnings("serial") static final class MapReduceValuesTask<K,V,U>
6097	<	extends BulkTask<K,V,U> {
6098	<	final Fun<? super V, ? extends U> transformer;
6099	<	final BiFun<? super U, ? super U, ? extends U> reducer;
6097	>	extends Traverser<K,V,U> {
6098	>	final Function<? super V, ? extends U> transformer;
6099	>	final BiFunction<? super U, ? super U, ? extends U> reducer;
6100		U result;
6101		MapReduceValuesTask<K,V,U> rights, nextRight;
6102		MapReduceValuesTask
6103	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
6103	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
6104		MapReduceValuesTask<K,V,U> nextRight,
6105	<	Fun<? super V, ? extends U> transformer,
6106	<	BiFun<? super U, ? super U, ? extends U> reducer) {
6105	>	Function<? super V, ? extends U> transformer,
6106	>	BiFunction<? super U, ? super U, ? extends U> reducer) {
6107		super(m, p, b); this.nextRight = nextRight;
6108		this.transformer = transformer;
6109		this.reducer = reducer;
6110		}
6111	<	@SuppressWarnings("unchecked") public final boolean exec() {
6112	<	final Fun<? super V, ? extends U> transformer =
6113	<	this.transformer;
6114	<	final BiFun<? super U, ? super U, ? extends U> reducer =
6115	<	this.reducer;
6116	<	if (transformer == null || reducer == null)
6117	<	return abortOnNullFunction();
6217	<	try {
6218	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6219	<	do {} while (!casPending(c = pending, c+1));
6111	>	public final U getRawResult() { return result; }
6112	>	@SuppressWarnings("unchecked") public final void compute() {
6113	>	final Function<? super V, ? extends U> transformer;
6114	>	final BiFunction<? super U, ? super U, ? extends U> reducer;
6115	>	if ((transformer = this.transformer) != null &&
6116	>	(reducer = this.reducer) != null) {
6117	>	for (int b; (b = preSplit()) > 0;)
6118		(rights = new MapReduceValuesTask<K,V,U>
6119	<	(map, this, b >>>= 1, rights, transformer, reducer)).fork();
6222	<	}
6119	>	(map, this, b, rights, transformer, reducer)).fork();
6120		U r = null, u;
6121	<	Object v;
6121	>	V v;
6122		while ((v = advance()) != null) {
6123	<	if ((u = transformer.apply((V)v)) != null)
6123	>	if ((u = transformer.apply(v)) != null)
6124		r = (r == null) ? u : reducer.apply(r, u);
6125		}
6126		result = r;
6127	<	for (MapReduceValuesTask<K,V,U> t = this, s;;) {
6128	<	int c; BulkTask<K,V,?> par; U tr, sr;
6129	<	if ((c = t.pending) == 0) {
6130	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6131	<	if ((sr = s.result) != null)
6132	<	t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr);
6133	<	}
6134	<	if ((par = t.parent) == null ||
6135	<	!(par instanceof MapReduceValuesTask)) {
6136	<	t.quietlyComplete();
6137	<	break;
6241	<	}
6242	<	t = (MapReduceValuesTask<K,V,U>)par;
6127	>	CountedCompleter<?> c;
6128	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6129	>	MapReduceValuesTask<K,V,U>
6130	>	t = (MapReduceValuesTask<K,V,U>)c,
6131	>	s = t.rights;
6132	>	while (s != null) {
6133	>	U tr, sr;
6134	>	if ((sr = s.result) != null)
6135	>	t.result = (((tr = t.result) == null) ? sr :
6136	>	reducer.apply(tr, sr));
6137	>	s = t.rights = s.nextRight;
6138		}
6244	–	else if (t.casPending(c, c - 1))
6245	–	break;
6139		}
6247	–	} catch (Throwable ex) {
6248	–	return tryCompleteComputation(ex);
6249	–	}
6250	–	MapReduceValuesTask<K,V,U> s = rights;
6251	–	if (s != null && !inForkJoinPool()) {
6252	–	do  {
6253	–	if (s.tryUnfork())
6254	–	s.exec();
6255	–	} while ((s = s.nextRight) != null);
6140		}
6257	–	return false;
6141		}
6259	–	public final U getRawResult() { return result; }
6142		}
6143
6144		@SuppressWarnings("serial") static final class MapReduceEntriesTask<K,V,U>
6145	<	extends BulkTask<K,V,U> {
6146	<	final Fun<Map.Entry<K,V>, ? extends U> transformer;
6147	<	final BiFun<? super U, ? super U, ? extends U> reducer;
6145	>	extends Traverser<K,V,U> {
6146	>	final Function<Map.Entry<K,V>, ? extends U> transformer;
6147	>	final BiFunction<? super U, ? super U, ? extends U> reducer;
6148		U result;
6149		MapReduceEntriesTask<K,V,U> rights, nextRight;
6150		MapReduceEntriesTask
6151	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
6151	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
6152		MapReduceEntriesTask<K,V,U> nextRight,
6153	<	Fun<Map.Entry<K,V>, ? extends U> transformer,
6154	<	BiFun<? super U, ? super U, ? extends U> reducer) {
6153	>	Function<Map.Entry<K,V>, ? extends U> transformer,
6154	>	BiFunction<? super U, ? super U, ? extends U> reducer) {
6155		super(m, p, b); this.nextRight = nextRight;
6156		this.transformer = transformer;
6157		this.reducer = reducer;
6158		}
6159	<	@SuppressWarnings("unchecked") public final boolean exec() {
6160	<	final Fun<Map.Entry<K,V>, ? extends U> transformer =
6161	<	this.transformer;
6162	<	final BiFun<? super U, ? super U, ? extends U> reducer =
6163	<	this.reducer;
6164	<	if (transformer == null || reducer == null)
6165	<	return abortOnNullFunction();
6284	<	try {
6285	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6286	<	do {} while (!casPending(c = pending, c+1));
6159	>	public final U getRawResult() { return result; }
6160	>	@SuppressWarnings("unchecked") public final void compute() {
6161	>	final Function<Map.Entry<K,V>, ? extends U> transformer;
6162	>	final BiFunction<? super U, ? super U, ? extends U> reducer;
6163	>	if ((transformer = this.transformer) != null &&
6164	>	(reducer = this.reducer) != null) {
6165	>	for (int b; (b = preSplit()) > 0;)
6166		(rights = new MapReduceEntriesTask<K,V,U>
6167	<	(map, this, b >>>= 1, rights, transformer, reducer)).fork();
6289	<	}
6167	>	(map, this, b, rights, transformer, reducer)).fork();
6168		U r = null, u;
6169	<	Object v;
6169	>	V v;
6170		while ((v = advance()) != null) {
6171	<	if ((u = transformer.apply(entryFor((K)nextKey, (V)v))) != null)
6171	>	if ((u = transformer.apply(entryFor(nextKey,
6172	>	v))) != null)
6173		r = (r == null) ? u : reducer.apply(r, u);
6174		}
6175		result = r;
6176	<	for (MapReduceEntriesTask<K,V,U> t = this, s;;) {
6177	<	int c; BulkTask<K,V,?> par; U tr, sr;
6178	<	if ((c = t.pending) == 0) {
6179	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6180	<	if ((sr = s.result) != null)
6181	<	t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr);
6182	<	}
6183	<	if ((par = t.parent) == null ||
6184	<	!(par instanceof MapReduceEntriesTask)) {
6185	<	t.quietlyComplete();
6186	<	break;
6308	<	}
6309	<	t = (MapReduceEntriesTask<K,V,U>)par;
6176	>	CountedCompleter<?> c;
6177	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6178	>	MapReduceEntriesTask<K,V,U>
6179	>	t = (MapReduceEntriesTask<K,V,U>)c,
6180	>	s = t.rights;
6181	>	while (s != null) {
6182	>	U tr, sr;
6183	>	if ((sr = s.result) != null)
6184	>	t.result = (((tr = t.result) == null) ? sr :
6185	>	reducer.apply(tr, sr));
6186	>	s = t.rights = s.nextRight;
6187		}
6311	–	else if (t.casPending(c, c - 1))
6312	–	break;
6188		}
6314	–	} catch (Throwable ex) {
6315	–	return tryCompleteComputation(ex);
6316	–	}
6317	–	MapReduceEntriesTask<K,V,U> s = rights;
6318	–	if (s != null && !inForkJoinPool()) {
6319	–	do  {
6320	–	if (s.tryUnfork())
6321	–	s.exec();
6322	–	} while ((s = s.nextRight) != null);
6189		}
6324	–	return false;
6190		}
6326	–	public final U getRawResult() { return result; }
6191		}
6192
6193		@SuppressWarnings("serial") static final class MapReduceMappingsTask<K,V,U>
6194	<	extends BulkTask<K,V,U> {
6195	<	final BiFun<? super K, ? super V, ? extends U> transformer;
6196	<	final BiFun<? super U, ? super U, ? extends U> reducer;
6194	>	extends Traverser<K,V,U> {
6195	>	final BiFunction<? super K, ? super V, ? extends U> transformer;
6196	>	final BiFunction<? super U, ? super U, ? extends U> reducer;
6197		U result;
6198		MapReduceMappingsTask<K,V,U> rights, nextRight;
6199		MapReduceMappingsTask
6200	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
6200	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
6201		MapReduceMappingsTask<K,V,U> nextRight,
6202	<	BiFun<? super K, ? super V, ? extends U> transformer,
6203	<	BiFun<? super U, ? super U, ? extends U> reducer) {
6202	>	BiFunction<? super K, ? super V, ? extends U> transformer,
6203	>	BiFunction<? super U, ? super U, ? extends U> reducer) {
6204		super(m, p, b); this.nextRight = nextRight;
6205		this.transformer = transformer;
6206		this.reducer = reducer;
6207		}
6208	<	@SuppressWarnings("unchecked") public final boolean exec() {
6209	<	final BiFun<? super K, ? super V, ? extends U> transformer =
6210	<	this.transformer;
6211	<	final BiFun<? super U, ? super U, ? extends U> reducer =
6212	<	this.reducer;
6213	<	if (transformer == null || reducer == null)
6214	<	return abortOnNullFunction();
6351	<	try {
6352	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6353	<	do {} while (!casPending(c = pending, c+1));
6208	>	public final U getRawResult() { return result; }
6209	>	@SuppressWarnings("unchecked") public final void compute() {
6210	>	final BiFunction<? super K, ? super V, ? extends U> transformer;
6211	>	final BiFunction<? super U, ? super U, ? extends U> reducer;
6212	>	if ((transformer = this.transformer) != null &&
6213	>	(reducer = this.reducer) != null) {
6214	>	for (int b; (b = preSplit()) > 0;)
6215		(rights = new MapReduceMappingsTask<K,V,U>
6216	<	(map, this, b >>>= 1, rights, transformer, reducer)).fork();
6356	<	}
6216	>	(map, this, b, rights, transformer, reducer)).fork();
6217		U r = null, u;
6218	<	Object v;
6218	>	V v;
6219		while ((v = advance()) != null) {
6220	<	if ((u = transformer.apply((K)nextKey, (V)v)) != null)
6220	>	if ((u = transformer.apply(nextKey, v)) != null)
6221		r = (r == null) ? u : reducer.apply(r, u);
6222		}
6223		result = r;
6224	<	for (MapReduceMappingsTask<K,V,U> t = this, s;;) {
6225	<	int c; BulkTask<K,V,?> par; U tr, sr;
6226	<	if ((c = t.pending) == 0) {
6227	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6228	<	if ((sr = s.result) != null)
6229	<	t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr);
6230	<	}
6231	<	if ((par = t.parent) == null ||
6232	<	!(par instanceof MapReduceMappingsTask)) {
6233	<	t.quietlyComplete();
6234	<	break;
6375	<	}
6376	<	t = (MapReduceMappingsTask<K,V,U>)par;
6224	>	CountedCompleter<?> c;
6225	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6226	>	MapReduceMappingsTask<K,V,U>
6227	>	t = (MapReduceMappingsTask<K,V,U>)c,
6228	>	s = t.rights;
6229	>	while (s != null) {
6230	>	U tr, sr;
6231	>	if ((sr = s.result) != null)
6232	>	t.result = (((tr = t.result) == null) ? sr :
6233	>	reducer.apply(tr, sr));
6234	>	s = t.rights = s.nextRight;
6235		}
6378	–	else if (t.casPending(c, c - 1))
6379	–	break;
6236		}
6381	–	} catch (Throwable ex) {
6382	–	return tryCompleteComputation(ex);
6383	–	}
6384	–	MapReduceMappingsTask<K,V,U> s = rights;
6385	–	if (s != null && !inForkJoinPool()) {
6386	–	do  {
6387	–	if (s.tryUnfork())
6388	–	s.exec();
6389	–	} while ((s = s.nextRight) != null);
6237		}
6391	–	return false;
6238		}
6393	–	public final U getRawResult() { return result; }
6239		}
6240
6241		@SuppressWarnings("serial") static final class MapReduceKeysToDoubleTask<K,V>
6242	<	extends BulkTask<K,V,Double> {
6243	<	final ObjectToDouble<? super K> transformer;
6244	<	final DoubleByDoubleToDouble reducer;
6242	>	extends Traverser<K,V,Double> {
6243	>	final ToDoubleFunction<? super K> transformer;
6244	>	final DoubleBinaryOperator reducer;
6245		final double basis;
6246		double result;
6247		MapReduceKeysToDoubleTask<K,V> rights, nextRight;
6248		MapReduceKeysToDoubleTask
6249	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
6249	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
6250		MapReduceKeysToDoubleTask<K,V> nextRight,
6251	<	ObjectToDouble<? super K> transformer,
6251	>	ToDoubleFunction<? super K> transformer,
6252		double basis,
6253	<	DoubleByDoubleToDouble reducer) {
6253	>	DoubleBinaryOperator reducer) {
6254		super(m, p, b); this.nextRight = nextRight;
6255		this.transformer = transformer;
6256		this.basis = basis; this.reducer = reducer;
6257		}
6258	<	@SuppressWarnings("unchecked") public final boolean exec() {
6259	<	final ObjectToDouble<? super K> transformer =
6260	<	this.transformer;
6261	<	final DoubleByDoubleToDouble reducer = this.reducer;
6262	<	if (transformer == null || reducer == null)
6263	<	return abortOnNullFunction();
6264	<	try {
6265	<	final double id = this.basis;
6421	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6422	<	do {} while (!casPending(c = pending, c+1));
6258	>	public final Double getRawResult() { return result; }
6259	>	@SuppressWarnings("unchecked") public final void compute() {
6260	>	final ToDoubleFunction<? super K> transformer;
6261	>	final DoubleBinaryOperator reducer;
6262	>	if ((transformer = this.transformer) != null &&
6263	>	(reducer = this.reducer) != null) {
6264	>	double r = this.basis;
6265	>	for (int b; (b = preSplit()) > 0;)
6266		(rights = new MapReduceKeysToDoubleTask<K,V>
6267	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6425	<	}
6426	<	double r = id;
6267	>	(map, this, b, rights, transformer, r, reducer)).fork();
6268		while (advance() != null)
6269	<	r = reducer.apply(r, transformer.apply((K)nextKey));
6269	>	r = reducer.applyAsDouble(r, transformer.applyAsDouble(nextKey));
6270		result = r;
6271	<	for (MapReduceKeysToDoubleTask<K,V> t = this, s;;) {
6272	<	int c; BulkTask<K,V,?> par;
6273	<	if ((c = t.pending) == 0) {
6274	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6275	<	t.result = reducer.apply(t.result, s.result);
6276	<	}
6277	<	if ((par = t.parent) == null ||
6278	<	!(par instanceof MapReduceKeysToDoubleTask)) {
6438	<	t.quietlyComplete();
6439	<	break;
6440	<	}
6441	<	t = (MapReduceKeysToDoubleTask<K,V>)par;
6271	>	CountedCompleter<?> c;
6272	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6273	>	MapReduceKeysToDoubleTask<K,V>
6274	>	t = (MapReduceKeysToDoubleTask<K,V>)c,
6275	>	s = t.rights;
6276	>	while (s != null) {
6277	>	t.result = reducer.applyAsDouble(t.result, s.result);
6278	>	s = t.rights = s.nextRight;
6279		}
6443	–	else if (t.casPending(c, c - 1))
6444	–	break;
6280		}
6446	–	} catch (Throwable ex) {
6447	–	return tryCompleteComputation(ex);
6281		}
6449	–	MapReduceKeysToDoubleTask<K,V> s = rights;
6450	–	if (s != null && !inForkJoinPool()) {
6451	–	do  {
6452	–	if (s.tryUnfork())
6453	–	s.exec();
6454	–	} while ((s = s.nextRight) != null);
6455	–	}
6456	–	return false;
6282		}
6458	–	public final Double getRawResult() { return result; }
6283		}
6284
6285		@SuppressWarnings("serial") static final class MapReduceValuesToDoubleTask<K,V>
6286	<	extends BulkTask<K,V,Double> {
6287	<	final ObjectToDouble<? super V> transformer;
6288	<	final DoubleByDoubleToDouble reducer;
6286	>	extends Traverser<K,V,Double> {
6287	>	final ToDoubleFunction<? super V> transformer;
6288	>	final DoubleBinaryOperator reducer;
6289		final double basis;
6290		double result;
6291		MapReduceValuesToDoubleTask<K,V> rights, nextRight;
6292		MapReduceValuesToDoubleTask
6293	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
6293	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
6294		MapReduceValuesToDoubleTask<K,V> nextRight,
6295	<	ObjectToDouble<? super V> transformer,
6295	>	ToDoubleFunction<? super V> transformer,
6296		double basis,
6297	<	DoubleByDoubleToDouble reducer) {
6297	>	DoubleBinaryOperator reducer) {
6298		super(m, p, b); this.nextRight = nextRight;
6299		this.transformer = transformer;
6300		this.basis = basis; this.reducer = reducer;
6301		}
6302	<	@SuppressWarnings("unchecked") public final boolean exec() {
6303	<	final ObjectToDouble<? super V> transformer =
6304	<	this.transformer;
6305	<	final DoubleByDoubleToDouble reducer = this.reducer;
6306	<	if (transformer == null || reducer == null)
6307	<	return abortOnNullFunction();
6308	<	try {
6309	<	final double id = this.basis;
6486	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6487	<	do {} while (!casPending(c = pending, c+1));
6302	>	public final Double getRawResult() { return result; }
6303	>	@SuppressWarnings("unchecked") public final void compute() {
6304	>	final ToDoubleFunction<? super V> transformer;
6305	>	final DoubleBinaryOperator reducer;
6306	>	if ((transformer = this.transformer) != null &&
6307	>	(reducer = this.reducer) != null) {
6308	>	double r = this.basis;
6309	>	for (int b; (b = preSplit()) > 0;)
6310		(rights = new MapReduceValuesToDoubleTask<K,V>
6311	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6312	<	}
6491	<	double r = id;
6492	<	Object v;
6311	>	(map, this, b, rights, transformer, r, reducer)).fork();
6312	>	V v;
6313		while ((v = advance()) != null)
6314	<	r = reducer.apply(r, transformer.apply((V)v));
6314	>	r = reducer.applyAsDouble(r, transformer.applyAsDouble(v));
6315		result = r;
6316	<	for (MapReduceValuesToDoubleTask<K,V> t = this, s;;) {
6317	<	int c; BulkTask<K,V,?> par;
6318	<	if ((c = t.pending) == 0) {
6319	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6320	<	t.result = reducer.apply(t.result, s.result);
6321	<	}
6322	<	if ((par = t.parent) == null ||
6323	<	!(par instanceof MapReduceValuesToDoubleTask)) {
6504	<	t.quietlyComplete();
6505	<	break;
6506	<	}
6507	<	t = (MapReduceValuesToDoubleTask<K,V>)par;
6316	>	CountedCompleter<?> c;
6317	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6318	>	MapReduceValuesToDoubleTask<K,V>
6319	>	t = (MapReduceValuesToDoubleTask<K,V>)c,
6320	>	s = t.rights;
6321	>	while (s != null) {
6322	>	t.result = reducer.applyAsDouble(t.result, s.result);
6323	>	s = t.rights = s.nextRight;
6324		}
6509	–	else if (t.casPending(c, c - 1))
6510	–	break;
6325		}
6512	–	} catch (Throwable ex) {
6513	–	return tryCompleteComputation(ex);
6514	–	}
6515	–	MapReduceValuesToDoubleTask<K,V> s = rights;
6516	–	if (s != null && !inForkJoinPool()) {
6517	–	do  {
6518	–	if (s.tryUnfork())
6519	–	s.exec();
6520	–	} while ((s = s.nextRight) != null);
6326		}
6522	–	return false;
6327		}
6524	–	public final Double getRawResult() { return result; }
6328		}
6329
6330		@SuppressWarnings("serial") static final class MapReduceEntriesToDoubleTask<K,V>
6331	<	extends BulkTask<K,V,Double> {
6332	<	final ObjectToDouble<Map.Entry<K,V>> transformer;
6333	<	final DoubleByDoubleToDouble reducer;
6331	>	extends Traverser<K,V,Double> {
6332	>	final ToDoubleFunction<Map.Entry<K,V>> transformer;
6333	>	final DoubleBinaryOperator reducer;
6334		final double basis;
6335		double result;
6336		MapReduceEntriesToDoubleTask<K,V> rights, nextRight;
6337		MapReduceEntriesToDoubleTask
6338	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
6338	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
6339		MapReduceEntriesToDoubleTask<K,V> nextRight,
6340	<	ObjectToDouble<Map.Entry<K,V>> transformer,
6340	>	ToDoubleFunction<Map.Entry<K,V>> transformer,
6341		double basis,
6342	<	DoubleByDoubleToDouble reducer) {
6342	>	DoubleBinaryOperator reducer) {
6343		super(m, p, b); this.nextRight = nextRight;
6344		this.transformer = transformer;
6345		this.basis = basis; this.reducer = reducer;
6346		}
6347	<	@SuppressWarnings("unchecked") public final boolean exec() {
6348	<	final ObjectToDouble<Map.Entry<K,V>> transformer =
6349	<	this.transformer;
6350	<	final DoubleByDoubleToDouble reducer = this.reducer;
6351	<	if (transformer == null || reducer == null)
6352	<	return abortOnNullFunction();
6353	<	try {
6354	<	final double id = this.basis;
6552	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6553	<	do {} while (!casPending(c = pending, c+1));
6347	>	public final Double getRawResult() { return result; }
6348	>	@SuppressWarnings("unchecked") public final void compute() {
6349	>	final ToDoubleFunction<Map.Entry<K,V>> transformer;
6350	>	final DoubleBinaryOperator reducer;
6351	>	if ((transformer = this.transformer) != null &&
6352	>	(reducer = this.reducer) != null) {
6353	>	double r = this.basis;
6354	>	for (int b; (b = preSplit()) > 0;)
6355		(rights = new MapReduceEntriesToDoubleTask<K,V>
6356	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6357	<	}
6557	<	double r = id;
6558	<	Object v;
6356	>	(map, this, b, rights, transformer, r, reducer)).fork();
6357	>	V v;
6358		while ((v = advance()) != null)
6359	<	r = reducer.apply(r, transformer.apply(entryFor((K)nextKey, (V)v)));
6359	>	r = reducer.applyAsDouble(r, transformer.applyAsDouble(entryFor(nextKey,
6360	>	v)));
6361		result = r;
6362	<	for (MapReduceEntriesToDoubleTask<K,V> t = this, s;;) {
6363	<	int c; BulkTask<K,V,?> par;
6364	<	if ((c = t.pending) == 0) {
6365	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6366	<	t.result = reducer.apply(t.result, s.result);
6367	<	}
6368	<	if ((par = t.parent) == null ||
6369	<	!(par instanceof MapReduceEntriesToDoubleTask)) {
6570	<	t.quietlyComplete();
6571	<	break;
6572	<	}
6573	<	t = (MapReduceEntriesToDoubleTask<K,V>)par;
6362	>	CountedCompleter<?> c;
6363	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6364	>	MapReduceEntriesToDoubleTask<K,V>
6365	>	t = (MapReduceEntriesToDoubleTask<K,V>)c,
6366	>	s = t.rights;
6367	>	while (s != null) {
6368	>	t.result = reducer.applyAsDouble(t.result, s.result);
6369	>	s = t.rights = s.nextRight;
6370		}
6575	–	else if (t.casPending(c, c - 1))
6576	–	break;
6371		}
6578	–	} catch (Throwable ex) {
6579	–	return tryCompleteComputation(ex);
6580	–	}
6581	–	MapReduceEntriesToDoubleTask<K,V> s = rights;
6582	–	if (s != null && !inForkJoinPool()) {
6583	–	do  {
6584	–	if (s.tryUnfork())
6585	–	s.exec();
6586	–	} while ((s = s.nextRight) != null);
6372		}
6588	–	return false;
6373		}
6590	–	public final Double getRawResult() { return result; }
6374		}
6375
6376		@SuppressWarnings("serial") static final class MapReduceMappingsToDoubleTask<K,V>
6377	<	extends BulkTask<K,V,Double> {
6378	<	final ObjectByObjectToDouble<? super K, ? super V> transformer;
6379	<	final DoubleByDoubleToDouble reducer;
6377	>	extends Traverser<K,V,Double> {
6378	>	final ToDoubleBiFunction<? super K, ? super V> transformer;
6379	>	final DoubleBinaryOperator reducer;
6380		final double basis;
6381		double result;
6382		MapReduceMappingsToDoubleTask<K,V> rights, nextRight;
6383		MapReduceMappingsToDoubleTask
6384	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
6384	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
6385		MapReduceMappingsToDoubleTask<K,V> nextRight,
6386	<	ObjectByObjectToDouble<? super K, ? super V> transformer,
6386	>	ToDoubleBiFunction<? super K, ? super V> transformer,
6387		double basis,
6388	<	DoubleByDoubleToDouble reducer) {
6388	>	DoubleBinaryOperator reducer) {
6389		super(m, p, b); this.nextRight = nextRight;
6390		this.transformer = transformer;
6391		this.basis = basis; this.reducer = reducer;
6392		}
6393	<	@SuppressWarnings("unchecked") public final boolean exec() {
6394	<	final ObjectByObjectToDouble<? super K, ? super V> transformer =
6395	<	this.transformer;
6396	<	final DoubleByDoubleToDouble reducer = this.reducer;
6397	<	if (transformer == null || reducer == null)
6398	<	return abortOnNullFunction();
6399	<	try {
6400	<	final double id = this.basis;
6618	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6619	<	do {} while (!casPending(c = pending, c+1));
6393	>	public final Double getRawResult() { return result; }
6394	>	@SuppressWarnings("unchecked") public final void compute() {
6395	>	final ToDoubleBiFunction<? super K, ? super V> transformer;
6396	>	final DoubleBinaryOperator reducer;
6397	>	if ((transformer = this.transformer) != null &&
6398	>	(reducer = this.reducer) != null) {
6399	>	double r = this.basis;
6400	>	for (int b; (b = preSplit()) > 0;)
6401		(rights = new MapReduceMappingsToDoubleTask<K,V>
6402	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6403	<	}
6623	<	double r = id;
6624	<	Object v;
6402	>	(map, this, b, rights, transformer, r, reducer)).fork();
6403	>	V v;
6404		while ((v = advance()) != null)
6405	<	r = reducer.apply(r, transformer.apply((K)nextKey, (V)v));
6405	>	r = reducer.applyAsDouble(r, transformer.applyAsDouble(nextKey, v));
6406		result = r;
6407	<	for (MapReduceMappingsToDoubleTask<K,V> t = this, s;;) {
6408	<	int c; BulkTask<K,V,?> par;
6409	<	if ((c = t.pending) == 0) {
6410	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6411	<	t.result = reducer.apply(t.result, s.result);
6412	<	}
6413	<	if ((par = t.parent) == null ||
6414	<	!(par instanceof MapReduceMappingsToDoubleTask)) {
6636	<	t.quietlyComplete();
6637	<	break;
6638	<	}
6639	<	t = (MapReduceMappingsToDoubleTask<K,V>)par;
6407	>	CountedCompleter<?> c;
6408	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6409	>	MapReduceMappingsToDoubleTask<K,V>
6410	>	t = (MapReduceMappingsToDoubleTask<K,V>)c,
6411	>	s = t.rights;
6412	>	while (s != null) {
6413	>	t.result = reducer.applyAsDouble(t.result, s.result);
6414	>	s = t.rights = s.nextRight;
6415		}
6641	–	else if (t.casPending(c, c - 1))
6642	–	break;
6416		}
6644	–	} catch (Throwable ex) {
6645	–	return tryCompleteComputation(ex);
6646	–	}
6647	–	MapReduceMappingsToDoubleTask<K,V> s = rights;
6648	–	if (s != null && !inForkJoinPool()) {
6649	–	do  {
6650	–	if (s.tryUnfork())
6651	–	s.exec();
6652	–	} while ((s = s.nextRight) != null);
6417		}
6654	–	return false;
6418		}
6656	–	public final Double getRawResult() { return result; }
6419		}
6420
6421		@SuppressWarnings("serial") static final class MapReduceKeysToLongTask<K,V>
6422	<	extends BulkTask<K,V,Long> {
6423	<	final ObjectToLong<? super K> transformer;
6424	<	final LongByLongToLong reducer;
6422	>	extends Traverser<K,V,Long> {
6423	>	final ToLongFunction<? super K> transformer;
6424	>	final LongBinaryOperator reducer;
6425		final long basis;
6426		long result;
6427		MapReduceKeysToLongTask<K,V> rights, nextRight;
6428		MapReduceKeysToLongTask
6429	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
6429	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
6430		MapReduceKeysToLongTask<K,V> nextRight,
6431	<	ObjectToLong<? super K> transformer,
6431	>	ToLongFunction<? super K> transformer,
6432		long basis,
6433	<	LongByLongToLong reducer) {
6433	>	LongBinaryOperator reducer) {
6434		super(m, p, b); this.nextRight = nextRight;
6435		this.transformer = transformer;
6436		this.basis = basis; this.reducer = reducer;
6437		}
6438	<	@SuppressWarnings("unchecked") public final boolean exec() {
6439	<	final ObjectToLong<? super K> transformer =
6440	<	this.transformer;
6441	<	final LongByLongToLong reducer = this.reducer;
6442	<	if (transformer == null || reducer == null)
6443	<	return abortOnNullFunction();
6444	<	try {
6445	<	final long id = this.basis;
6684	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6685	<	do {} while (!casPending(c = pending, c+1));
6438	>	public final Long getRawResult() { return result; }
6439	>	@SuppressWarnings("unchecked") public final void compute() {
6440	>	final ToLongFunction<? super K> transformer;
6441	>	final LongBinaryOperator reducer;
6442	>	if ((transformer = this.transformer) != null &&
6443	>	(reducer = this.reducer) != null) {
6444	>	long r = this.basis;
6445	>	for (int b; (b = preSplit()) > 0;)
6446		(rights = new MapReduceKeysToLongTask<K,V>
6447	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6688	<	}
6689	<	long r = id;
6447	>	(map, this, b, rights, transformer, r, reducer)).fork();
6448		while (advance() != null)
6449	<	r = reducer.apply(r, transformer.apply((K)nextKey));
6449	>	r = reducer.applyAsLong(r, transformer.applyAsLong(nextKey));
6450		result = r;
6451	<	for (MapReduceKeysToLongTask<K,V> t = this, s;;) {
6452	<	int c; BulkTask<K,V,?> par;
6453	<	if ((c = t.pending) == 0) {
6454	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6455	<	t.result = reducer.apply(t.result, s.result);
6456	<	}
6457	<	if ((par = t.parent) == null ||
6458	<	!(par instanceof MapReduceKeysToLongTask)) {
6701	<	t.quietlyComplete();
6702	<	break;
6703	<	}
6704	<	t = (MapReduceKeysToLongTask<K,V>)par;
6451	>	CountedCompleter<?> c;
6452	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6453	>	MapReduceKeysToLongTask<K,V>
6454	>	t = (MapReduceKeysToLongTask<K,V>)c,
6455	>	s = t.rights;
6456	>	while (s != null) {
6457	>	t.result = reducer.applyAsLong(t.result, s.result);
6458	>	s = t.rights = s.nextRight;
6459		}
6706	–	else if (t.casPending(c, c - 1))
6707	–	break;
6460		}
6709	–	} catch (Throwable ex) {
6710	–	return tryCompleteComputation(ex);
6461		}
6712	–	MapReduceKeysToLongTask<K,V> s = rights;
6713	–	if (s != null && !inForkJoinPool()) {
6714	–	do  {
6715	–	if (s.tryUnfork())
6716	–	s.exec();
6717	–	} while ((s = s.nextRight) != null);
6718	–	}
6719	–	return false;
6462		}
6721	–	public final Long getRawResult() { return result; }
6463		}
6464
6465		@SuppressWarnings("serial") static final class MapReduceValuesToLongTask<K,V>
6466	<	extends BulkTask<K,V,Long> {
6467	<	final ObjectToLong<? super V> transformer;
6468	<	final LongByLongToLong reducer;
6466	>	extends Traverser<K,V,Long> {
6467	>	final ToLongFunction<? super V> transformer;
6468	>	final LongBinaryOperator reducer;
6469		final long basis;
6470		long result;
6471		MapReduceValuesToLongTask<K,V> rights, nextRight;
6472		MapReduceValuesToLongTask
6473	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
6473	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
6474		MapReduceValuesToLongTask<K,V> nextRight,
6475	<	ObjectToLong<? super V> transformer,
6475	>	ToLongFunction<? super V> transformer,
6476		long basis,
6477	<	LongByLongToLong reducer) {
6477	>	LongBinaryOperator reducer) {
6478		super(m, p, b); this.nextRight = nextRight;
6479		this.transformer = transformer;
6480		this.basis = basis; this.reducer = reducer;
6481		}
6482	<	@SuppressWarnings("unchecked") public final boolean exec() {
6483	<	final ObjectToLong<? super V> transformer =
6484	<	this.transformer;
6485	<	final LongByLongToLong reducer = this.reducer;
6486	<	if (transformer == null || reducer == null)
6487	<	return abortOnNullFunction();
6488	<	try {
6489	<	final long id = this.basis;
6749	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6750	<	do {} while (!casPending(c = pending, c+1));
6482	>	public final Long getRawResult() { return result; }
6483	>	@SuppressWarnings("unchecked") public final void compute() {
6484	>	final ToLongFunction<? super V> transformer;
6485	>	final LongBinaryOperator reducer;
6486	>	if ((transformer = this.transformer) != null &&
6487	>	(reducer = this.reducer) != null) {
6488	>	long r = this.basis;
6489	>	for (int b; (b = preSplit()) > 0;)
6490		(rights = new MapReduceValuesToLongTask<K,V>
6491	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6492	<	}
6754	<	long r = id;
6755	<	Object v;
6491	>	(map, this, b, rights, transformer, r, reducer)).fork();
6492	>	V v;
6493		while ((v = advance()) != null)
6494	<	r = reducer.apply(r, transformer.apply((V)v));
6494	>	r = reducer.applyAsLong(r, transformer.applyAsLong(v));
6495		result = r;
6496	<	for (MapReduceValuesToLongTask<K,V> t = this, s;;) {
6497	<	int c; BulkTask<K,V,?> par;
6498	<	if ((c = t.pending) == 0) {
6499	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6500	<	t.result = reducer.apply(t.result, s.result);
6501	<	}
6502	<	if ((par = t.parent) == null ||
6503	<	!(par instanceof MapReduceValuesToLongTask)) {
6767	<	t.quietlyComplete();
6768	<	break;
6769	<	}
6770	<	t = (MapReduceValuesToLongTask<K,V>)par;
6496	>	CountedCompleter<?> c;
6497	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6498	>	MapReduceValuesToLongTask<K,V>
6499	>	t = (MapReduceValuesToLongTask<K,V>)c,
6500	>	s = t.rights;
6501	>	while (s != null) {
6502	>	t.result = reducer.applyAsLong(t.result, s.result);
6503	>	s = t.rights = s.nextRight;
6504		}
6772	–	else if (t.casPending(c, c - 1))
6773	–	break;
6505		}
6775	–	} catch (Throwable ex) {
6776	–	return tryCompleteComputation(ex);
6777	–	}
6778	–	MapReduceValuesToLongTask<K,V> s = rights;
6779	–	if (s != null && !inForkJoinPool()) {
6780	–	do  {
6781	–	if (s.tryUnfork())
6782	–	s.exec();
6783	–	} while ((s = s.nextRight) != null);
6506		}
6785	–	return false;
6507		}
6787	–	public final Long getRawResult() { return result; }
6508		}
6509
6510		@SuppressWarnings("serial") static final class MapReduceEntriesToLongTask<K,V>
6511	<	extends BulkTask<K,V,Long> {
6512	<	final ObjectToLong<Map.Entry<K,V>> transformer;
6513	<	final LongByLongToLong reducer;
6511	>	extends Traverser<K,V,Long> {
6512	>	final ToLongFunction<Map.Entry<K,V>> transformer;
6513	>	final LongBinaryOperator reducer;
6514		final long basis;
6515		long result;
6516		MapReduceEntriesToLongTask<K,V> rights, nextRight;
6517		MapReduceEntriesToLongTask
6518	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
6518	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
6519		MapReduceEntriesToLongTask<K,V> nextRight,
6520	<	ObjectToLong<Map.Entry<K,V>> transformer,
6520	>	ToLongFunction<Map.Entry<K,V>> transformer,
6521		long basis,
6522	<	LongByLongToLong reducer) {
6522	>	LongBinaryOperator reducer) {
6523		super(m, p, b); this.nextRight = nextRight;
6524		this.transformer = transformer;
6525		this.basis = basis; this.reducer = reducer;
6526		}
6527	<	@SuppressWarnings("unchecked") public final boolean exec() {
6528	<	final ObjectToLong<Map.Entry<K,V>> transformer =
6529	<	this.transformer;
6530	<	final LongByLongToLong reducer = this.reducer;
6531	<	if (transformer == null || reducer == null)
6532	<	return abortOnNullFunction();
6533	<	try {
6534	<	final long id = this.basis;
6815	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6816	<	do {} while (!casPending(c = pending, c+1));
6527	>	public final Long getRawResult() { return result; }
6528	>	@SuppressWarnings("unchecked") public final void compute() {
6529	>	final ToLongFunction<Map.Entry<K,V>> transformer;
6530	>	final LongBinaryOperator reducer;
6531	>	if ((transformer = this.transformer) != null &&
6532	>	(reducer = this.reducer) != null) {
6533	>	long r = this.basis;
6534	>	for (int b; (b = preSplit()) > 0;)
6535		(rights = new MapReduceEntriesToLongTask<K,V>
6536	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6537	<	}
6820	<	long r = id;
6821	<	Object v;
6536	>	(map, this, b, rights, transformer, r, reducer)).fork();
6537	>	V v;
6538		while ((v = advance()) != null)
6539	<	r = reducer.apply(r, transformer.apply(entryFor((K)nextKey, (V)v)));
6539	>	r = reducer.applyAsLong(r, transformer.applyAsLong(entryFor(nextKey, v)));
6540		result = r;
6541	<	for (MapReduceEntriesToLongTask<K,V> t = this, s;;) {
6542	<	int c; BulkTask<K,V,?> par;
6543	<	if ((c = t.pending) == 0) {
6544	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6545	<	t.result = reducer.apply(t.result, s.result);
6546	<	}
6547	<	if ((par = t.parent) == null ||
6548	<	!(par instanceof MapReduceEntriesToLongTask)) {
6833	<	t.quietlyComplete();
6834	<	break;
6835	<	}
6836	<	t = (MapReduceEntriesToLongTask<K,V>)par;
6541	>	CountedCompleter<?> c;
6542	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6543	>	MapReduceEntriesToLongTask<K,V>
6544	>	t = (MapReduceEntriesToLongTask<K,V>)c,
6545	>	s = t.rights;
6546	>	while (s != null) {
6547	>	t.result = reducer.applyAsLong(t.result, s.result);
6548	>	s = t.rights = s.nextRight;
6549		}
6838	–	else if (t.casPending(c, c - 1))
6839	–	break;
6550		}
6841	–	} catch (Throwable ex) {
6842	–	return tryCompleteComputation(ex);
6843	–	}
6844	–	MapReduceEntriesToLongTask<K,V> s = rights;
6845	–	if (s != null && !inForkJoinPool()) {
6846	–	do  {
6847	–	if (s.tryUnfork())
6848	–	s.exec();
6849	–	} while ((s = s.nextRight) != null);
6551		}
6851	–	return false;
6552		}
6853	–	public final Long getRawResult() { return result; }
6553		}
6554
6555		@SuppressWarnings("serial") static final class MapReduceMappingsToLongTask<K,V>
6556	<	extends BulkTask<K,V,Long> {
6557	<	final ObjectByObjectToLong<? super K, ? super V> transformer;
6558	<	final LongByLongToLong reducer;
6556	>	extends Traverser<K,V,Long> {
6557	>	final ToLongBiFunction<? super K, ? super V> transformer;
6558	>	final LongBinaryOperator reducer;
6559		final long basis;
6560		long result;
6561		MapReduceMappingsToLongTask<K,V> rights, nextRight;
6562		MapReduceMappingsToLongTask
6563	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
6563	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
6564		MapReduceMappingsToLongTask<K,V> nextRight,
6565	<	ObjectByObjectToLong<? super K, ? super V> transformer,
6565	>	ToLongBiFunction<? super K, ? super V> transformer,
6566		long basis,
6567	<	LongByLongToLong reducer) {
6567	>	LongBinaryOperator reducer) {
6568		super(m, p, b); this.nextRight = nextRight;
6569		this.transformer = transformer;
6570		this.basis = basis; this.reducer = reducer;
6571		}
6572	<	@SuppressWarnings("unchecked") public final boolean exec() {
6573	<	final ObjectByObjectToLong<? super K, ? super V> transformer =
6574	<	this.transformer;
6575	<	final LongByLongToLong reducer = this.reducer;
6576	<	if (transformer == null || reducer == null)
6577	<	return abortOnNullFunction();
6578	<	try {
6579	<	final long id = this.basis;
6881	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6882	<	do {} while (!casPending(c = pending, c+1));
6572	>	public final Long getRawResult() { return result; }
6573	>	@SuppressWarnings("unchecked") public final void compute() {
6574	>	final ToLongBiFunction<? super K, ? super V> transformer;
6575	>	final LongBinaryOperator reducer;
6576	>	if ((transformer = this.transformer) != null &&
6577	>	(reducer = this.reducer) != null) {
6578	>	long r = this.basis;
6579	>	for (int b; (b = preSplit()) > 0;)
6580		(rights = new MapReduceMappingsToLongTask<K,V>
6581	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6582	<	}
6886	<	long r = id;
6887	<	Object v;
6581	>	(map, this, b, rights, transformer, r, reducer)).fork();
6582	>	V v;
6583		while ((v = advance()) != null)
6584	<	r = reducer.apply(r, transformer.apply((K)nextKey, (V)v));
6584	>	r = reducer.applyAsLong(r, transformer.applyAsLong(nextKey, v));
6585		result = r;
6586	<	for (MapReduceMappingsToLongTask<K,V> t = this, s;;) {
6587	<	int c; BulkTask<K,V,?> par;
6588	<	if ((c = t.pending) == 0) {
6589	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6590	<	t.result = reducer.apply(t.result, s.result);
6591	<	}
6592	<	if ((par = t.parent) == null ||
6593	<	!(par instanceof MapReduceMappingsToLongTask)) {
6899	<	t.quietlyComplete();
6900	<	break;
6901	<	}
6902	<	t = (MapReduceMappingsToLongTask<K,V>)par;
6586	>	CountedCompleter<?> c;
6587	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6588	>	MapReduceMappingsToLongTask<K,V>
6589	>	t = (MapReduceMappingsToLongTask<K,V>)c,
6590	>	s = t.rights;
6591	>	while (s != null) {
6592	>	t.result = reducer.applyAsLong(t.result, s.result);
6593	>	s = t.rights = s.nextRight;
6594		}
6904	–	else if (t.casPending(c, c - 1))
6905	–	break;
6595		}
6907	–	} catch (Throwable ex) {
6908	–	return tryCompleteComputation(ex);
6596		}
6910	–	MapReduceMappingsToLongTask<K,V> s = rights;
6911	–	if (s != null && !inForkJoinPool()) {
6912	–	do  {
6913	–	if (s.tryUnfork())
6914	–	s.exec();
6915	–	} while ((s = s.nextRight) != null);
6916	–	}
6917	–	return false;
6597		}
6919	–	public final Long getRawResult() { return result; }
6598		}
6599
6600		@SuppressWarnings("serial") static final class MapReduceKeysToIntTask<K,V>
6601	<	extends BulkTask<K,V,Integer> {
6602	<	final ObjectToInt<? super K> transformer;
6603	<	final IntByIntToInt reducer;
6601	>	extends Traverser<K,V,Integer> {
6602	>	final ToIntFunction<? super K> transformer;
6603	>	final IntBinaryOperator reducer;
6604		final int basis;
6605		int result;
6606		MapReduceKeysToIntTask<K,V> rights, nextRight;
6607		MapReduceKeysToIntTask
6608	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
6608	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
6609		MapReduceKeysToIntTask<K,V> nextRight,
6610	<	ObjectToInt<? super K> transformer,
6610	>	ToIntFunction<? super K> transformer,
6611		int basis,
6612	<	IntByIntToInt reducer) {
6612	>	IntBinaryOperator reducer) {
6613		super(m, p, b); this.nextRight = nextRight;
6614		this.transformer = transformer;
6615		this.basis = basis; this.reducer = reducer;
6616		}
6617	<	@SuppressWarnings("unchecked") public final boolean exec() {
6618	<	final ObjectToInt<? super K> transformer =
6619	<	this.transformer;
6620	<	final IntByIntToInt reducer = this.reducer;
6621	<	if (transformer == null || reducer == null)
6622	<	return abortOnNullFunction();
6623	<	try {
6624	<	final int id = this.basis;
6947	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6948	<	do {} while (!casPending(c = pending, c+1));
6617	>	public final Integer getRawResult() { return result; }
6618	>	@SuppressWarnings("unchecked") public final void compute() {
6619	>	final ToIntFunction<? super K> transformer;
6620	>	final IntBinaryOperator reducer;
6621	>	if ((transformer = this.transformer) != null &&
6622	>	(reducer = this.reducer) != null) {
6623	>	int r = this.basis;
6624	>	for (int b; (b = preSplit()) > 0;)
6625		(rights = new MapReduceKeysToIntTask<K,V>
6626	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6951	<	}
6952	<	int r = id;
6626	>	(map, this, b, rights, transformer, r, reducer)).fork();
6627		while (advance() != null)
6628	<	r = reducer.apply(r, transformer.apply((K)nextKey));
6628	>	r = reducer.applyAsInt(r, transformer.applyAsInt(nextKey));
6629		result = r;
6630	<	for (MapReduceKeysToIntTask<K,V> t = this, s;;) {
6631	<	int c; BulkTask<K,V,?> par;
6632	<	if ((c = t.pending) == 0) {
6633	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6634	<	t.result = reducer.apply(t.result, s.result);
6635	<	}
6636	<	if ((par = t.parent) == null ||
6637	<	!(par instanceof MapReduceKeysToIntTask)) {
6964	<	t.quietlyComplete();
6965	<	break;
6966	<	}
6967	<	t = (MapReduceKeysToIntTask<K,V>)par;
6630	>	CountedCompleter<?> c;
6631	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6632	>	MapReduceKeysToIntTask<K,V>
6633	>	t = (MapReduceKeysToIntTask<K,V>)c,
6634	>	s = t.rights;
6635	>	while (s != null) {
6636	>	t.result = reducer.applyAsInt(t.result, s.result);
6637	>	s = t.rights = s.nextRight;
6638		}
6969	–	else if (t.casPending(c, c - 1))
6970	–	break;
6639		}
6972	–	} catch (Throwable ex) {
6973	–	return tryCompleteComputation(ex);
6640		}
6975	–	MapReduceKeysToIntTask<K,V> s = rights;
6976	–	if (s != null && !inForkJoinPool()) {
6977	–	do  {
6978	–	if (s.tryUnfork())
6979	–	s.exec();
6980	–	} while ((s = s.nextRight) != null);
6981	–	}
6982	–	return false;
6641		}
6984	–	public final Integer getRawResult() { return result; }
6642		}
6643
6644		@SuppressWarnings("serial") static final class MapReduceValuesToIntTask<K,V>
6645	<	extends BulkTask<K,V,Integer> {
6646	<	final ObjectToInt<? super V> transformer;
6647	<	final IntByIntToInt reducer;
6645	>	extends Traverser<K,V,Integer> {
6646	>	final ToIntFunction<? super V> transformer;
6647	>	final IntBinaryOperator reducer;
6648		final int basis;
6649		int result;
6650		MapReduceValuesToIntTask<K,V> rights, nextRight;
6651		MapReduceValuesToIntTask
6652	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
6652	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
6653		MapReduceValuesToIntTask<K,V> nextRight,
6654	<	ObjectToInt<? super V> transformer,
6654	>	ToIntFunction<? super V> transformer,
6655		int basis,
6656	<	IntByIntToInt reducer) {
6656	>	IntBinaryOperator reducer) {
6657		super(m, p, b); this.nextRight = nextRight;
6658		this.transformer = transformer;
6659		this.basis = basis; this.reducer = reducer;
6660		}
6661	<	@SuppressWarnings("unchecked") public final boolean exec() {
6662	<	final ObjectToInt<? super V> transformer =
6663	<	this.transformer;
6664	<	final IntByIntToInt reducer = this.reducer;
6665	<	if (transformer == null || reducer == null)
6666	<	return abortOnNullFunction();
6667	<	try {
6668	<	final int id = this.basis;
7012	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
7013	<	do {} while (!casPending(c = pending, c+1));
6661	>	public final Integer getRawResult() { return result; }
6662	>	@SuppressWarnings("unchecked") public final void compute() {
6663	>	final ToIntFunction<? super V> transformer;
6664	>	final IntBinaryOperator reducer;
6665	>	if ((transformer = this.transformer) != null &&
6666	>	(reducer = this.reducer) != null) {
6667	>	int r = this.basis;
6668	>	for (int b; (b = preSplit()) > 0;)
6669		(rights = new MapReduceValuesToIntTask<K,V>
6670	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6671	<	}
7017	<	int r = id;
7018	<	Object v;
6670	>	(map, this, b, rights, transformer, r, reducer)).fork();
6671	>	V v;
6672		while ((v = advance()) != null)
6673	<	r = reducer.apply(r, transformer.apply((V)v));
6673	>	r = reducer.applyAsInt(r, transformer.applyAsInt(v));
6674		result = r;
6675	<	for (MapReduceValuesToIntTask<K,V> t = this, s;;) {
6676	<	int c; BulkTask<K,V,?> par;
6677	<	if ((c = t.pending) == 0) {
6678	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6679	<	t.result = reducer.apply(t.result, s.result);
6680	<	}
6681	<	if ((par = t.parent) == null ||
6682	<	!(par instanceof MapReduceValuesToIntTask)) {
7030	<	t.quietlyComplete();
7031	<	break;
7032	<	}
7033	<	t = (MapReduceValuesToIntTask<K,V>)par;
6675	>	CountedCompleter<?> c;
6676	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6677	>	MapReduceValuesToIntTask<K,V>
6678	>	t = (MapReduceValuesToIntTask<K,V>)c,
6679	>	s = t.rights;
6680	>	while (s != null) {
6681	>	t.result = reducer.applyAsInt(t.result, s.result);
6682	>	s = t.rights = s.nextRight;
6683		}
7035	–	else if (t.casPending(c, c - 1))
7036	–	break;
6684		}
7038	–	} catch (Throwable ex) {
7039	–	return tryCompleteComputation(ex);
7040	–	}
7041	–	MapReduceValuesToIntTask<K,V> s = rights;
7042	–	if (s != null && !inForkJoinPool()) {
7043	–	do  {
7044	–	if (s.tryUnfork())
7045	–	s.exec();
7046	–	} while ((s = s.nextRight) != null);
6685		}
7048	–	return false;
6686		}
7050	–	public final Integer getRawResult() { return result; }
6687		}
6688
6689		@SuppressWarnings("serial") static final class MapReduceEntriesToIntTask<K,V>
6690	<	extends BulkTask<K,V,Integer> {
6691	<	final ObjectToInt<Map.Entry<K,V>> transformer;
6692	<	final IntByIntToInt reducer;
6690	>	extends Traverser<K,V,Integer> {
6691	>	final ToIntFunction<Map.Entry<K,V>> transformer;
6692	>	final IntBinaryOperator reducer;
6693		final int basis;
6694		int result;
6695		MapReduceEntriesToIntTask<K,V> rights, nextRight;
6696		MapReduceEntriesToIntTask
6697	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
6697	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
6698		MapReduceEntriesToIntTask<K,V> nextRight,
6699	<	ObjectToInt<Map.Entry<K,V>> transformer,
6699	>	ToIntFunction<Map.Entry<K,V>> transformer,
6700		int basis,
6701	<	IntByIntToInt reducer) {
6701	>	IntBinaryOperator reducer) {
6702		super(m, p, b); this.nextRight = nextRight;
6703		this.transformer = transformer;
6704		this.basis = basis; this.reducer = reducer;
6705		}
6706	<	@SuppressWarnings("unchecked") public final boolean exec() {
6707	<	final ObjectToInt<Map.Entry<K,V>> transformer =
6708	<	this.transformer;
6709	<	final IntByIntToInt reducer = this.reducer;
6710	<	if (transformer == null || reducer == null)
6711	<	return abortOnNullFunction();
6712	<	try {
6713	<	final int id = this.basis;
7078	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
7079	<	do {} while (!casPending(c = pending, c+1));
6706	>	public final Integer getRawResult() { return result; }
6707	>	@SuppressWarnings("unchecked") public final void compute() {
6708	>	final ToIntFunction<Map.Entry<K,V>> transformer;
6709	>	final IntBinaryOperator reducer;
6710	>	if ((transformer = this.transformer) != null &&
6711	>	(reducer = this.reducer) != null) {
6712	>	int r = this.basis;
6713	>	for (int b; (b = preSplit()) > 0;)
6714		(rights = new MapReduceEntriesToIntTask<K,V>
6715	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6716	<	}
7083	<	int r = id;
7084	<	Object v;
6715	>	(map, this, b, rights, transformer, r, reducer)).fork();
6716	>	V v;
6717		while ((v = advance()) != null)
6718	<	r = reducer.apply(r, transformer.apply(entryFor((K)nextKey, (V)v)));
6718	>	r = reducer.applyAsInt(r, transformer.applyAsInt(entryFor(nextKey,
6719	>	v)));
6720		result = r;
6721	<	for (MapReduceEntriesToIntTask<K,V> t = this, s;;) {
6722	<	int c; BulkTask<K,V,?> par;
6723	<	if ((c = t.pending) == 0) {
6724	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6725	<	t.result = reducer.apply(t.result, s.result);
6726	<	}
6727	<	if ((par = t.parent) == null ||
6728	<	!(par instanceof MapReduceEntriesToIntTask)) {
7096	<	t.quietlyComplete();
7097	<	break;
7098	<	}
7099	<	t = (MapReduceEntriesToIntTask<K,V>)par;
6721	>	CountedCompleter<?> c;
6722	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6723	>	MapReduceEntriesToIntTask<K,V>
6724	>	t = (MapReduceEntriesToIntTask<K,V>)c,
6725	>	s = t.rights;
6726	>	while (s != null) {
6727	>	t.result = reducer.applyAsInt(t.result, s.result);
6728	>	s = t.rights = s.nextRight;
6729		}
7101	–	else if (t.casPending(c, c - 1))
7102	–	break;
6730		}
7104	–	} catch (Throwable ex) {
7105	–	return tryCompleteComputation(ex);
7106	–	}
7107	–	MapReduceEntriesToIntTask<K,V> s = rights;
7108	–	if (s != null && !inForkJoinPool()) {
7109	–	do  {
7110	–	if (s.tryUnfork())
7111	–	s.exec();
7112	–	} while ((s = s.nextRight) != null);
6731		}
7114	–	return false;
6732		}
7116	–	public final Integer getRawResult() { return result; }
6733		}
6734
6735		@SuppressWarnings("serial") static final class MapReduceMappingsToIntTask<K,V>
6736	<	extends BulkTask<K,V,Integer> {
6737	<	final ObjectByObjectToInt<? super K, ? super V> transformer;
6738	<	final IntByIntToInt reducer;
6736	>	extends Traverser<K,V,Integer> {
6737	>	final ToIntBiFunction<? super K, ? super V> transformer;
6738	>	final IntBinaryOperator reducer;
6739		final int basis;
6740		int result;
6741		MapReduceMappingsToIntTask<K,V> rights, nextRight;
6742		MapReduceMappingsToIntTask
6743	<	(ConcurrentHashMap<K,V> m, BulkTask<K,V,?> p, int b,
6744	<	MapReduceMappingsToIntTask<K,V> rights,
6745	<	ObjectByObjectToInt<? super K, ? super V> transformer,
6743	>	(ConcurrentHashMap<K,V> m, Traverser<K,V,?> p, int b,
6744	>	MapReduceMappingsToIntTask<K,V> nextRight,
6745	>	ToIntBiFunction<? super K, ? super V> transformer,
6746		int basis,
6747	<	IntByIntToInt reducer) {
6747	>	IntBinaryOperator reducer) {
6748		super(m, p, b); this.nextRight = nextRight;
6749		this.transformer = transformer;
6750		this.basis = basis; this.reducer = reducer;
6751		}
6752	<	@SuppressWarnings("unchecked") public final boolean exec() {
6753	<	final ObjectByObjectToInt<? super K, ? super V> transformer =
6754	<	this.transformer;
6755	<	final IntByIntToInt reducer = this.reducer;
6756	<	if (transformer == null || reducer == null)
6757	<	return abortOnNullFunction();
6758	<	try {
6759	<	final int id = this.basis;
7144	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
7145	<	do {} while (!casPending(c = pending, c+1));
6752	>	public final Integer getRawResult() { return result; }
6753	>	@SuppressWarnings("unchecked") public final void compute() {
6754	>	final ToIntBiFunction<? super K, ? super V> transformer;
6755	>	final IntBinaryOperator reducer;
6756	>	if ((transformer = this.transformer) != null &&
6757	>	(reducer = this.reducer) != null) {
6758	>	int r = this.basis;
6759	>	for (int b; (b = preSplit()) > 0;)
6760		(rights = new MapReduceMappingsToIntTask<K,V>
6761	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6762	<	}
7149	<	int r = id;
7150	<	Object v;
6761	>	(map, this, b, rights, transformer, r, reducer)).fork();
6762	>	V v;
6763		while ((v = advance()) != null)
6764	<	r = reducer.apply(r, transformer.apply((K)nextKey, (V)v));
6764	>	r = reducer.applyAsInt(r, transformer.applyAsInt(nextKey, v));
6765		result = r;
6766	<	for (MapReduceMappingsToIntTask<K,V> t = this, s;;) {
6767	<	int c; BulkTask<K,V,?> par;
6768	<	if ((c = t.pending) == 0) {
6769	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6770	<	t.result = reducer.apply(t.result, s.result);
6771	<	}
6772	<	if ((par = t.parent) == null ||
6773	<	!(par instanceof MapReduceMappingsToIntTask)) {
7162	<	t.quietlyComplete();
7163	<	break;
7164	<	}
7165	<	t = (MapReduceMappingsToIntTask<K,V>)par;
6766	>	CountedCompleter<?> c;
6767	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6768	>	MapReduceMappingsToIntTask<K,V>
6769	>	t = (MapReduceMappingsToIntTask<K,V>)c,
6770	>	s = t.rights;
6771	>	while (s != null) {
6772	>	t.result = reducer.applyAsInt(t.result, s.result);
6773	>	s = t.rights = s.nextRight;
6774		}
7167	–	else if (t.casPending(c, c - 1))
7168	–	break;
6775		}
7170	–	} catch (Throwable ex) {
7171	–	return tryCompleteComputation(ex);
7172	–	}
7173	–	MapReduceMappingsToIntTask<K,V> s = rights;
7174	–	if (s != null && !inForkJoinPool()) {
7175	–	do  {
7176	–	if (s.tryUnfork())
7177	–	s.exec();
7178	–	} while ((s = s.nextRight) != null);
6776		}
7180	–	return false;
6777		}
7182	–	public final Integer getRawResult() { return result; }
6778		}
6779
6780		// Unsafe mechanics
6781	<	private static final sun.misc.Unsafe UNSAFE;
6782	<	private static final long counterOffset;
6783	<	private static final long sizeCtlOffset;
6781	>	private static final sun.misc.Unsafe U;
6782	>	private static final long SIZECTL;
6783	>	private static final long TRANSFERINDEX;
6784	>	private static final long TRANSFERORIGIN;
6785	>	private static final long BASECOUNT;
6786	>	private static final long CELLSBUSY;
6787	>	private static final long CELLVALUE;
6788		private static final long ABASE;
6789		private static final int ASHIFT;
6790
6791		static {
7193	–	int ss;
6792		try {
6793	<	UNSAFE = sun.misc.Unsafe.getUnsafe();
6793	>	U = sun.misc.Unsafe.getUnsafe();
6794		Class<?> k = ConcurrentHashMap.class;
6795	<	counterOffset = UNSAFE.objectFieldOffset
7198	<	(k.getDeclaredField("counter"));
7199	<	sizeCtlOffset = UNSAFE.objectFieldOffset
6795	>	SIZECTL = U.objectFieldOffset
6796		(k.getDeclaredField("sizeCtl"));
6797	+	TRANSFERINDEX = U.objectFieldOffset
6798	+	(k.getDeclaredField("transferIndex"));
6799	+	TRANSFERORIGIN = U.objectFieldOffset
6800	+	(k.getDeclaredField("transferOrigin"));
6801	+	BASECOUNT = U.objectFieldOffset
6802	+	(k.getDeclaredField("baseCount"));
6803	+	CELLSBUSY = U.objectFieldOffset
6804	+	(k.getDeclaredField("cellsBusy"));
6805	+	Class<?> ck = Cell.class;
6806	+	CELLVALUE = U.objectFieldOffset
6807	+	(ck.getDeclaredField("value"));
6808		Class<?> sc = Node[].class;
6809	<	ABASE = UNSAFE.arrayBaseOffset(sc);
6810	<	ss = UNSAFE.arrayIndexScale(sc);
6809	>	ABASE = U.arrayBaseOffset(sc);
6810	>	int scale = U.arrayIndexScale(sc);
6811	>	if ((scale & (scale - 1)) != 0)
6812	>	throw new Error("data type scale not a power of two");
6813	>	ASHIFT = 31 - Integer.numberOfLeadingZeros(scale);
6814		} catch (Exception e) {
6815		throw new Error(e);
6816		}
7207	–	if ((ss & (ss-1)) != 0)
7208	–	throw new Error("data type scale not a power of two");
7209	–	ASHIFT = 31 - Integer.numberOfLeadingZeros(ss);
6817		}
6818	+
6819		}

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