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Comparing jsr166/src/jsr166e/ConcurrentHashMapV8.java (file contents):
Revision 1.35 by jsr166, Mon Jan 2 23:16:22 2012 UTC vs.
Revision 1.75 by dl, Wed Oct 31 12:49:13 2012 UTC

#	Line 5 | Line 5
5		*/
6
7		package jsr166e;
8	<	import jsr166e.LongAdder;
8	>
9	>	import java.util.Comparator;
10		import java.util.Arrays;
11		import java.util.Map;
12		import java.util.Set;
#	Line 20 | Line 21 | import java.util.Enumeration;
21		import java.util.ConcurrentModificationException;
22		import java.util.NoSuchElementException;
23		import java.util.concurrent.ConcurrentMap;
24	+	import java.util.concurrent.ThreadLocalRandom;
25		import java.util.concurrent.locks.LockSupport;
26	+	import java.util.concurrent.locks.AbstractQueuedSynchronizer;
27	+	import java.util.concurrent.atomic.AtomicReference;
28	+
29		import java.io.Serializable;
30
31		/**
#	Line 39 | Line 44 | import java.io.Serializable;
44		* block, so may overlap with update operations (including {@code put}
45		* and {@code remove}). Retrievals reflect the results of the most
46		* recently <em>completed</em> update operations holding upon their
47	<	* onset.  For aggregate operations such as {@code putAll} and {@code
48	<	* clear}, concurrent retrievals may reflect insertion or removal of
49	<	* only some entries.  Similarly, Iterators and Enumerations return
50	<	* elements reflecting the state of the hash table at some point at or
51	<	* since the creation of the iterator/enumeration.  They do
52	<	* <em>not</em> throw {@link ConcurrentModificationException}.
53	<	* However, iterators are designed to be used by only one thread at a
54	<	* time.  Bear in mind that the results of aggregate status methods
55	<	* including {@code size}, {@code isEmpty}, and {@code containsValue}
56	<	* are typically useful only when a map is not undergoing concurrent
57	<	* updates in other threads.  Otherwise the results of these methods
58	<	* reflect transient states that may be adequate for monitoring
59	<	* or estimation purposes, but not for program control.
47	>	* onset. (More formally, an update operation for a given key bears a
48	>	* <em>happens-before</em> relation with any (non-null) retrieval for
49	>	* that key reporting the updated value.)  For aggregate operations
50	>	* such as {@code putAll} and {@code clear}, concurrent retrievals may
51	>	* reflect insertion or removal of only some entries.  Similarly,
52	>	* Iterators and Enumerations return elements reflecting the state of
53	>	* the hash table at some point at or since the creation of the
54	>	* iterator/enumeration.  They do <em>not</em> throw {@link
55	>	* ConcurrentModificationException}.  However, iterators are designed
56	>	* to be used by only one thread at a time.  Bear in mind that the
57	>	* results of aggregate status methods including {@code size}, {@code
58	>	* isEmpty}, and {@code containsValue} are typically useful only when
59	>	* a map is not undergoing concurrent updates in other threads.
60	>	* Otherwise the results of these methods reflect transient states
61	>	* that may be adequate for monitoring or estimation purposes, but not
62	>	* for program control.
63		*
64		* <p> The table is dynamically expanded when there are too many
65		* collisions (i.e., keys that have distinct hash codes but fall into
#	Line 74 | Line 82 | import java.io.Serializable;
82		* {@code hashCode()} is a sure way to slow down performance of any
83		* hash table.
84		*
85	+	* <p> A {@link Set} projection of a ConcurrentHashMapV8 may be created
86	+	* (using {@link #newKeySet()} or {@link #newKeySet(int)}), or viewed
87	+	* (using {@link #keySet(Object)} when only keys are of interest, and the
88	+	* mapped values are (perhaps transiently) not used or all take the
89	+	* same mapping value.
90	+	*
91	+	* <p> A ConcurrentHashMapV8 can be used as scalable frequency map (a
92	+	* form of histogram or multiset) by using {@link LongAdder} values
93	+	* and initializing via {@link #computeIfAbsent}. For example, to add
94	+	* a count to a {@code ConcurrentHashMapV8<String,LongAdder> freqs}, you
95	+	* can use {@code freqs.computeIfAbsent(k -> new
96	+	* LongAdder()).increment();}
97	+	*
98		* <p>This class and its views and iterators implement all of the
99		* <em>optional</em> methods of the {@link Map} and {@link Iterator}
100		* interfaces.
#	Line 81 | Line 102 | import java.io.Serializable;
102		* <p> Like {@link Hashtable} but unlike {@link HashMap}, this class
103		* does <em>not</em> allow {@code null} to be used as a key or value.
104		*
105	+	* <p>ConcurrentHashMapV8s support parallel operations using the {@link
106	+	* ForkJoinPool#commonPool}. (Tasks that may be used in other contexts
107	+	* are available in class {@link ForkJoinTasks}). These operations are
108	+	* designed to be safely, and often sensibly, applied even with maps
109	+	* that are being concurrently updated by other threads; for example,
110	+	* when computing a snapshot summary of the values in a shared
111	+	* registry.  There are three kinds of operation, each with four
112	+	* forms, accepting functions with Keys, Values, Entries, and (Key,
113	+	* Value) arguments and/or return values. (The first three forms are
114	+	* also available via the {@link #keySet()}, {@link #values()} and
115	+	* {@link #entrySet()} views). Because the elements of a
116	+	* ConcurrentHashMapV8 are not ordered in any particular way, and may be
117	+	* processed in different orders in different parallel executions, the
118	+	* correctness of supplied functions should not depend on any
119	+	* ordering, or on any other objects or values that may transiently
120	+	* change while computation is in progress; and except for forEach
121	+	* actions, should ideally be side-effect-free.
122	+	*
123	+	* <ul>
124	+	* <li> forEach: Perform a given action on each element.
125	+	* A variant form applies a given transformation on each element
126	+	* before performing the action.</li>
127	+	*
128	+	* <li> search: Return the first available non-null result of
129	+	* applying a given function on each element; skipping further
130	+	* search when a result is found.</li>
131	+	*
132	+	* <li> reduce: Accumulate each element.  The supplied reduction
133	+	* function cannot rely on ordering (more formally, it should be
134	+	* both associative and commutative).  There are five variants:
135	+	*
136	+	* <ul>
137	+	*
138	+	* <li> Plain reductions. (There is not a form of this method for
139	+	* (key, value) function arguments since there is no corresponding
140	+	* return type.)</li>
141	+	*
142	+	* <li> Mapped reductions that accumulate the results of a given
143	+	* function applied to each element.</li>
144	+	*
145	+	* <li> Reductions to scalar doubles, longs, and ints, using a
146	+	* given basis value.</li>
147	+	*
148	+	* </li>
149	+	* </ul>
150	+	* </ul>
151	+	*
152	+	* <p>The concurrency properties of bulk operations follow
153	+	* from those of ConcurrentHashMapV8: Any non-null result returned
154	+	* from {@code get(key)} and related access methods bears a
155	+	* happens-before relation with the associated insertion or
156	+	* update.  The result of any bulk operation reflects the
157	+	* composition of these per-element relations (but is not
158	+	* necessarily atomic with respect to the map as a whole unless it
159	+	* is somehow known to be quiescent).  Conversely, because keys
160	+	* and values in the map are never null, null serves as a reliable
161	+	* atomic indicator of the current lack of any result.  To
162	+	* maintain this property, null serves as an implicit basis for
163	+	* all non-scalar reduction operations. For the double, long, and
164	+	* int versions, the basis should be one that, when combined with
165	+	* any other value, returns that other value (more formally, it
166	+	* should be the identity element for the reduction). Most common
167	+	* reductions have these properties; for example, computing a sum
168	+	* with basis 0 or a minimum with basis MAX_VALUE.
169	+	*
170	+	* <p>Search and transformation functions provided as arguments
171	+	* should similarly return null to indicate the lack of any result
172	+	* (in which case it is not used). In the case of mapped
173	+	* reductions, this also enables transformations to serve as
174	+	* filters, returning null (or, in the case of primitive
175	+	* specializations, the identity basis) if the element should not
176	+	* be combined. You can create compound transformations and
177	+	* filterings by composing them yourself under this "null means
178	+	* there is nothing there now" rule before using them in search or
179	+	* reduce operations.
180	+	*
181	+	* <p>Methods accepting and/or returning Entry arguments maintain
182	+	* key-value associations. They may be useful for example when
183	+	* finding the key for the greatest value. Note that "plain" Entry
184	+	* arguments can be supplied using {@code new
185	+	* AbstractMap.SimpleEntry(k,v)}.
186	+	*
187	+	* <p> Bulk operations may complete abruptly, throwing an
188	+	* exception encountered in the application of a supplied
189	+	* function. Bear in mind when handling such exceptions that other
190	+	* concurrently executing functions could also have thrown
191	+	* exceptions, or would have done so if the first exception had
192	+	* not occurred.
193	+	*
194	+	* <p>Parallel speedups for bulk operations compared to sequential
195	+	* processing are common but not guaranteed.  Operations involving
196	+	* brief functions on small maps may execute more slowly than
197	+	* sequential loops if the underlying work to parallelize the
198	+	* computation is more expensive than the computation itself.
199	+	* Similarly, parallelization may not lead to much actual parallelism
200	+	* if all processors are busy performing unrelated tasks.
201	+	*
202	+	* <p> All arguments to all task methods must be non-null.
203	+	*
204	+	* <p><em>jsr166e note: During transition, this class
205	+	* uses nested functional interfaces with different names but the
206	+	* same forms as those expected for JDK8.<em>
207	+	*
208		* <p>This class is a member of the
209		* <a href="{@docRoot}/../technotes/guides/collections/index.html">
210		* Java Collections Framework</a>.
211		*
88	–	* <p><em>jsr166e note: This class is a candidate replacement for
89	–	* java.util.concurrent.ConcurrentHashMap.<em>
90	–	*
212		* @since 1.5
213		* @author Doug Lea
214		* @param <K> the type of keys maintained by this map
215		* @param <V> the type of mapped values
216		*/
217		public class ConcurrentHashMapV8<K, V>
218	<	implements ConcurrentMap<K, V>, Serializable {
218	>	implements ConcurrentMap<K, V>, Serializable {
219		private static final long serialVersionUID = 7249069246763182397L;
220
221		/**
222	<	* A function computing a mapping from the given key to a value.
223	<	* This is a place-holder for an upcoming JDK8 interface.
222	>	* A partitionable iterator. A Spliterator can be traversed
223	>	* directly, but can also be partitioned (before traversal) by
224	>	* creating another Spliterator that covers a non-overlapping
225	>	* portion of the elements, and so may be amenable to parallel
226	>	* execution.
227	>	*
228	>	* <p> This interface exports a subset of expected JDK8
229	>	* functionality.
230	>	*
231	>	* <p>Sample usage: Here is one (of the several) ways to compute
232	>	* the sum of the values held in a map using the ForkJoin
233	>	* framework. As illustrated here, Spliterators are well suited to
234	>	* designs in which a task repeatedly splits off half its work
235	>	* into forked subtasks until small enough to process directly,
236	>	* and then joins these subtasks. Variants of this style can also
237	>	* be used in completion-based designs.
238	>	*
239	>	* <pre>
240	>	* {@code ConcurrentHashMapV8<String, Long> m = ...
241	>	* // split as if have 8 * parallelism, for load balance
242	>	* int n = m.size();
243	>	* int p = aForkJoinPool.getParallelism() * 8;
244	>	* int split = (n < p)? n : p;
245	>	* long sum = aForkJoinPool.invoke(new SumValues(m.valueSpliterator(), split, null));
246	>	* // ...
247	>	* static class SumValues extends RecursiveTask<Long> {
248	>	*   final Spliterator<Long> s;
249	>	*   final int split;             // split while > 1
250	>	*   final SumValues nextJoin;    // records forked subtasks to join
251	>	*   SumValues(Spliterator<Long> s, int depth, SumValues nextJoin) {
252	>	*     this.s = s; this.depth = depth; this.nextJoin = nextJoin;
253	>	*   }
254	>	*   public Long compute() {
255	>	*     long sum = 0;
256	>	*     SumValues subtasks = null; // fork subtasks
257	>	*     for (int s = split >>> 1; s > 0; s >>>= 1)
258	>	*       (subtasks = new SumValues(s.split(), s, subtasks)).fork();
259	>	*     while (s.hasNext())        // directly process remaining elements
260	>	*       sum += s.next();
261	>	*     for (SumValues t = subtasks; t != null; t = t.nextJoin)
262	>	*       sum += t.join();         // collect subtask results
263	>	*     return sum;
264	>	*   }
265	>	* }
266	>	* }</pre>
267		*/
268	<	public static interface MappingFunction<K, V> {
268	>	public static interface Spliterator<T> extends Iterator<T> {
269		/**
270	<	* Returns a non-null value for the given key.
270	>	* Returns a Spliterator covering approximately half of the
271	>	* elements, guaranteed not to overlap with those subsequently
272	>	* returned by this Spliterator.  After invoking this method,
273	>	* the current Spliterator will <em>not</em> produce any of
274	>	* the elements of the returned Spliterator, but the two
275	>	* Spliterators together will produce all of the elements that
276	>	* would have been produced by this Spliterator had this
277	>	* method not been called. The exact number of elements
278	>	* produced by the returned Spliterator is not guaranteed, and
279	>	* may be zero (i.e., with {@code hasNext()} reporting {@code
280	>	* false}) if this Spliterator cannot be further split.
281		*
282	<	* @param key the (non-null) key
283	<	* @return a non-null value
282	>	* @return a Spliterator covering approximately half of the
283	>	* elements
284	>	* @throws IllegalStateException if this Spliterator has
285	>	* already commenced traversing elements
286		*/
287	<	V map(K key);
287	>	Spliterator<T> split();
288		}
289
114	–	/**
115	–	* A function computing a new mapping given a key and its current
116	–	* mapped value (or {@code null} if there is no current
117	–	* mapping). This is a place-holder for an upcoming JDK8
118	–	* interface.
119	–	*/
120	–	public static interface RemappingFunction<K, V> {
121	–	/**
122	–	* Returns a new value given a key and its current value.
123	–	*
124	–	* @param key the (non-null) key
125	–	* @param value the current value, or null if there is no mapping
126	–	* @return a non-null value
127	–	*/
128	–	V remap(K key, V value);
129	–	}
290
291		/*
292		* Overview:
#	Line 147 | Line 307 | public class ConcurrentHashMapV8<K, V>
307		* supplying null-checks and casts as needed. This also allows
308		* many of the public methods to be factored into a smaller number
309		* of internal methods (although sadly not so for the five
310	<	* sprawling variants of put-related operations).
310	>	* variants of put-related operations). The validation-based
311	>	* approach explained below leads to a lot of code sprawl because
312	>	* retry-control precludes factoring into smaller methods.
313		*
314		* The table is lazily initialized to a power-of-two size upon the
315	<	* first insertion.  Each bin in the table contains a list of
316	<	* Nodes (most often, the list has only zero or one Node).  Table
317	<	* accesses require volatile/atomic reads, writes, and CASes.
318	<	* Because there is no other way to arrange this without adding
319	<	* further indirections, we use intrinsics (sun.misc.Unsafe)
320	<	* operations.  The lists of nodes within bins are always
321	<	* accurately traversable under volatile reads, so long as lookups
322	<	* check hash code and non-nullness of value before checking key
323	<	* equality.
315	>	* first insertion.  Each bin in the table normally contains a
316	>	* list of Nodes (most often, the list has only zero or one Node).
317	>	* Table accesses require volatile/atomic reads, writes, and
318	>	* CASes.  Because there is no other way to arrange this without
319	>	* adding further indirections, we use intrinsics
320	>	* (sun.misc.Unsafe) operations.  The lists of nodes within bins
321	>	* are always accurately traversable under volatile reads, so long
322	>	* as lookups check hash code and non-nullness of value before
323	>	* checking key equality.
324		*
325		* We use the top two bits of Node hash fields for control
326		* purposes -- they are available anyway because of addressing
#	Line 170 | Line 332 | public class ConcurrentHashMapV8<K, V>
332		*  10 - Node is a forwarding node
333		*
334		* The lower 30 bits of each Node's hash field contain a
335	<	* transformation (for better randomization -- method "spread") of
336	<	* the key's hash code, except for forwarding nodes, for which the
337	<	* lower bits are zero (and so always have hash field == MOVED).
335	>	* transformation of the key's hash code, except for forwarding
336	>	* nodes, for which the lower bits are zero (and so always have
337	>	* hash field == MOVED).
338		*
339		* Insertion (via put or its variants) of the first node in an
340		* empty bin is performed by just CASing it to the bin.  This is
341	<	* by far the most common case for put operations.  Other update
342	<	* operations (insert, delete, and replace) require locks.  We do
343	<	* not want to waste the space required to associate a distinct
344	<	* lock object with each bin, so instead use the first node of a
345	<	* bin list itself as a lock. Blocking support for these locks
346	<	* relies on the builtin "synchronized" monitors.  However, we
347	<	* also need a tryLock construction, so we overlay these by using
348	<	* bits of the Node hash field for lock control (see above), and
349	<	* so normally use builtin monitors only for blocking and
350	<	* signalling using wait/notifyAll constructions. See
351	<	* Node.tryAwaitLock.
341	>	* by far the most common case for put operations under most
342	>	* key/hash distributions.  Other update operations (insert,
343	>	* delete, and replace) require locks.  We do not want to waste
344	>	* the space required to associate a distinct lock object with
345	>	* each bin, so instead use the first node of a bin list itself as
346	>	* a lock. Blocking support for these locks relies on the builtin
347	>	* "synchronized" monitors.  However, we also need a tryLock
348	>	* construction, so we overlay these by using bits of the Node
349	>	* hash field for lock control (see above), and so normally use
350	>	* builtin monitors only for blocking and signalling using
351	>	* wait/notifyAll constructions. See Node.tryAwaitLock.
352		*
353		* Using the first node of a list as a lock does not by itself
354		* suffice though: When a node is locked, any update must first
#	Line 201 | Line 363 | public class ConcurrentHashMapV8<K, V>
363		* The main disadvantage of per-bin locks is that other update
364		* operations on other nodes in a bin list protected by the same
365		* lock can stall, for example when user equals() or mapping
366	<	* functions take a long time.  However, statistically, this is
367	<	* not a common enough problem to outweigh the time/space overhead
368	<	* of alternatives: Under random hash codes, the frequency of
207	<	* nodes in bins follows a Poisson distribution
366	>	* functions take a long time.  However, statistically, under
367	>	* random hash codes, this is not a common problem.  Ideally, the
368	>	* frequency of nodes in bins follows a Poisson distribution
369		* (http://en.wikipedia.org/wiki/Poisson_distribution) with a
370		* parameter of about 0.5 on average, given the resizing threshold
371		* of 0.75, although with a large variance because of resizing
372		* granularity. Ignoring variance, the expected occurrences of
373		* list size k are (exp(-0.5) * pow(0.5, k) / factorial(k)). The
374	<	* first few values are:
374	>	* first values are:
375		*
376	<	* 0:    0.607
377	<	* 1:    0.303
378	<	* 2:    0.076
379	<	* 3:    0.012
380	<	* more: 0.002
376	>	* 0:    0.60653066
377	>	* 1:    0.30326533
378	>	* 2:    0.07581633
379	>	* 3:    0.01263606
380	>	* 4:    0.00157952
381	>	* 5:    0.00015795
382	>	* 6:    0.00001316
383	>	* 7:    0.00000094
384	>	* 8:    0.00000006
385	>	* more: less than 1 in ten million
386		*
387		* Lock contention probability for two threads accessing distinct
388	<	* elements is roughly 1 / (8 * #elements).  Function "spread"
389	<	* performs hashCode randomization that improves the likelihood
390	<	* that these assumptions hold unless users define exactly the
391	<	* same value for too many hashCodes.
388	>	* elements is roughly 1 / (8 * #elements) under random hashes.
389	>	*
390	>	* Actual hash code distributions encountered in practice
391	>	* sometimes deviate significantly from uniform randomness.  This
392	>	* includes the case when N > (1<<30), so some keys MUST collide.
393	>	* Similarly for dumb or hostile usages in which multiple keys are
394	>	* designed to have identical hash codes. Also, although we guard
395	>	* against the worst effects of this (see method spread), sets of
396	>	* hashes may differ only in bits that do not impact their bin
397	>	* index for a given power-of-two mask.  So we use a secondary
398	>	* strategy that applies when the number of nodes in a bin exceeds
399	>	* a threshold, and at least one of the keys implements
400	>	* Comparable.  These TreeBins use a balanced tree to hold nodes
401	>	* (a specialized form of red-black trees), bounding search time
402	>	* to O(log N).  Each search step in a TreeBin is around twice as
403	>	* slow as in a regular list, but given that N cannot exceed
404	>	* (1<<64) (before running out of addresses) this bounds search
405	>	* steps, lock hold times, etc, to reasonable constants (roughly
406	>	* 100 nodes inspected per operation worst case) so long as keys
407	>	* are Comparable (which is very common -- String, Long, etc).
408	>	* TreeBin nodes (TreeNodes) also maintain the same "next"
409	>	* traversal pointers as regular nodes, so can be traversed in
410	>	* iterators in the same way.
411		*
412	<	* The table is resized when occupancy exceeds an occupancy
412	>	* The table is resized when occupancy exceeds a percentage
413		* threshold (nominally, 0.75, but see below).  Only a single
414		* thread performs the resize (using field "sizeCtl", to arrange
415		* exclusion), but the table otherwise remains usable for reads
#	Line 245 | Line 430 | public class ConcurrentHashMapV8<K, V>
430		*
431		* Each bin transfer requires its bin lock. However, unlike other
432		* cases, a transfer can skip a bin if it fails to acquire its
433	<	* lock, and revisit it later. Method rebuild maintains a buffer
434	<	* of TRANSFER_BUFFER_SIZE bins that have been skipped because of
435	<	* failure to acquire a lock, and blocks only if none are
436	<	* available (i.e., only very rarely).  The transfer operation
437	<	* must also ensure that all accessible bins in both the old and
438	<	* new table are usable by any traversal.  When there are no lock
439	<	* acquisition failures, this is arranged simply by proceeding
440	<	* from the last bin (table.length - 1) up towards the first.
441	<	* Upon seeing a forwarding node, traversals (see class
442	<	* InternalIterator) arrange to move to the new table without
443	<	* revisiting nodes.  However, when any node is skipped during a
444	<	* transfer, all earlier table bins may have become visible, so
445	<	* are initialized with a reverse-forwarding node back to the old
446	<	* table until the new ones are established. (This sometimes
447	<	* requires transiently locking a forwarding node, which is
448	<	* possible under the above encoding.) These more expensive
433	>	* lock, and revisit it later (unless it is a TreeBin). Method
434	>	* rebuild maintains a buffer of TRANSFER_BUFFER_SIZE bins that
435	>	* have been skipped because of failure to acquire a lock, and
436	>	* blocks only if none are available (i.e., only very rarely).
437	>	* The transfer operation must also ensure that all accessible
438	>	* bins in both the old and new table are usable by any traversal.
439	>	* When there are no lock acquisition failures, this is arranged
440	>	* simply by proceeding from the last bin (table.length - 1) up
441	>	* towards the first.  Upon seeing a forwarding node, traversals
442	>	* (see class Iter) arrange to move to the new table
443	>	* without revisiting nodes.  However, when any node is skipped
444	>	* during a transfer, all earlier table bins may have become
445	>	* visible, so are initialized with a reverse-forwarding node back
446	>	* to the old table until the new ones are established. (This
447	>	* sometimes requires transiently locking a forwarding node, which
448	>	* is possible under the above encoding.) These more expensive
449		* mechanics trigger only when necessary.
450		*
451		* The traversal scheme also applies to partial traversals of
452	<	* ranges of bins (via an alternate InternalIterator constructor)
453	<	* to support partitioned aggregate operations (that are not
454	<	* otherwise implemented yet).  Also, read-only operations give up
455	<	* if ever forwarded to a null table, which provides support for
456	<	* shutdown-style clearing, which is also not currently
272	<	* implemented.
452	>	* ranges of bins (via an alternate Traverser constructor)
453	>	* to support partitioned aggregate operations.  Also, read-only
454	>	* operations give up if ever forwarded to a null table, which
455	>	* provides support for shutdown-style clearing, which is also not
456	>	* currently implemented.
457		*
458		* Lazy table initialization minimizes footprint until first use,
459		* and also avoids resizings when the first operation is from a
#	Line 347 | Line 531 | public class ConcurrentHashMapV8<K, V>
531		*/
532		private static final int TRANSFER_BUFFER_SIZE = 32;
533
534	+	/**
535	+	* The bin count threshold for using a tree rather than list for a
536	+	* bin.  The value reflects the approximate break-even point for
537	+	* using tree-based operations.
538	+	*/
539	+	private static final int TREE_THRESHOLD = 8;
540	+
541		/*
542		* Encodings for special uses of Node hash fields. See above for
543		* explanation.
#	Line 379 | Line 570 | public class ConcurrentHashMapV8<K, V>
570		private transient volatile int sizeCtl;
571
572		// views
573	<	private transient KeySet<K,V> keySet;
574	<	private transient Values<K,V> values;
575	<	private transient EntrySet<K,V> entrySet;
573	>	private transient KeySetView<K,V> keySet;
574	>	private transient ValuesView<K,V> values;
575	>	private transient EntrySetView<K,V> entrySet;
576
577		/** For serialization compatibility. Null unless serialized; see below */
578		private Segment<K,V>[] segments;
579
580	+	/* ---------------- Table element access -------------- */
581	+
582	+	/*
583	+	* Volatile access methods are used for table elements as well as
584	+	* elements of in-progress next table while resizing.  Uses are
585	+	* null checked by callers, and implicitly bounds-checked, relying
586	+	* on the invariants that tab arrays have non-zero size, and all
587	+	* indices are masked with (tab.length - 1) which is never
588	+	* negative and always less than length. Note that, to be correct
589	+	* wrt arbitrary concurrency errors by users, bounds checks must
590	+	* operate on local variables, which accounts for some odd-looking
591	+	* inline assignments below.
592	+	*/
593	+
594	+	static final Node tabAt(Node[] tab, int i) { // used by Iter
595	+	return (Node)UNSAFE.getObjectVolatile(tab, ((long)i<<ASHIFT)+ABASE);
596	+	}
597	+
598	+	private static final boolean casTabAt(Node[] tab, int i, Node c, Node v) {
599	+	return UNSAFE.compareAndSwapObject(tab, ((long)i<<ASHIFT)+ABASE, c, v);
600	+	}
601	+
602	+	private static final void setTabAt(Node[] tab, int i, Node v) {
603	+	UNSAFE.putObjectVolatile(tab, ((long)i<<ASHIFT)+ABASE, v);
604	+	}
605	+
606		/* ---------------- Nodes -------------- */
607
608		/**
609		* Key-value entry. Note that this is never exported out as a
610	<	* user-visible Map.Entry (see WriteThroughEntry and SnapshotEntry
611	<	* below). Nodes with a hash field of MOVED are special, and do
612	<	* not contain user keys or values.  Otherwise, keys are never
613	<	* null, and null val fields indicate that a node is in the
614	<	* process of being deleted or created. For purposes of read-only
615	<	* access, a key may be read before a val, but can only be used
616	<	* after checking val to be non-null.
610	>	* user-visible Map.Entry (see MapEntry below). Nodes with a hash
611	>	* field of MOVED are special, and do not contain user keys or
612	>	* values.  Otherwise, keys are never null, and null val fields
613	>	* indicate that a node is in the process of being deleted or
614	>	* created. For purposes of read-only access, a key may be read
615	>	* before a val, but can only be used after checking val to be
616	>	* non-null.
617		*/
618	<	static final class Node {
618	>	static class Node {
619		volatile int hash;
620		final Object key;
621		volatile Object val;
#	Line 432 | Line 649 | public class ConcurrentHashMapV8<K, V>
649		* unlocking lock (via a failed CAS from non-waiting LOCKED
650		* state), unlockers acquire the sync lock and perform a
651		* notifyAll.
652	+	*
653	+	* The initial sanity check on tab and bounds is not currently
654	+	* necessary in the only usages of this method, but enables
655	+	* use in other future contexts.
656		*/
657		final void tryAwaitLock(Node[] tab, int i) {
658	<	if (tab != null && i >= 0 && i < tab.length) { // bounds check
658	>	if (tab != null && i >= 0 && i < tab.length) { // sanity check
659	>	int r = ThreadLocalRandom.current().nextInt(); // randomize spins
660		int spins = MAX_SPINS, h;
661		while (tabAt(tab, i) == this && ((h = hash) & LOCKED) != 0) {
662		if (spins >= 0) {
663	<	if (--spins == MAX_SPINS >>> 1)
664	<	Thread.yield();  // heuristically yield mid-way
663	>	r ^= r << 1; r ^= r >>> 3; r ^= r << 10; // xorshift
664	>	if (r >= 0 && --spins == 0)
665	>	Thread.yield();  // yield before block
666		}
667		else if (casHash(h, h | WAITING)) {
668		synchronized (this) {
#	Line 476 | Line 699 | public class ConcurrentHashMapV8<K, V>
699		}
700		}
701
702	<	/* ---------------- Table element access -------------- */
702	>	/* ---------------- TreeBins -------------- */
703
704	<	/*
705	<	* Volatile access methods are used for table elements as well as
483	<	* elements of in-progress next table while resizing.  Uses are
484	<	* null checked by callers, and implicitly bounds-checked, relying
485	<	* on the invariants that tab arrays have non-zero size, and all
486	<	* indices are masked with (tab.length - 1) which is never
487	<	* negative and always less than length. Note that, to be correct
488	<	* wrt arbitrary concurrency errors by users, bounds checks must
489	<	* operate on local variables, which accounts for some odd-looking
490	<	* inline assignments below.
704	>	/**
705	>	* Nodes for use in TreeBins
706		*/
707	<
708	<	static final Node tabAt(Node[] tab, int i) { // used by InternalIterator
709	<	return (Node)UNSAFE.getObjectVolatile(tab, ((long)i<<ASHIFT)+ABASE);
707	>	static final class TreeNode extends Node {
708	>	TreeNode parent;  // red-black tree links
709	>	TreeNode left;
710	>	TreeNode right;
711	>	TreeNode prev;    // needed to unlink next upon deletion
712	>	boolean red;
713	>
714	>	TreeNode(int hash, Object key, Object val, Node next, TreeNode parent) {
715	>	super(hash, key, val, next);
716	>	this.parent = parent;
717	>	}
718		}
719
720	<	private static final boolean casTabAt(Node[] tab, int i, Node c, Node v) {
721	<	return UNSAFE.compareAndSwapObject(tab, ((long)i<<ASHIFT)+ABASE, c, v);
722	<	}
720	>	/**
721	>	* A specialized form of red-black tree for use in bins
722	>	* whose size exceeds a threshold.
723	>	*
724	>	* TreeBins use a special form of comparison for search and
725	>	* related operations (which is the main reason we cannot use
726	>	* existing collections such as TreeMaps). TreeBins contain
727	>	* Comparable elements, but may contain others, as well as
728	>	* elements that are Comparable but not necessarily Comparable<T>
729	>	* for the same T, so we cannot invoke compareTo among them. To
730	>	* handle this, the tree is ordered primarily by hash value, then
731	>	* by getClass().getName() order, and then by Comparator order
732	>	* among elements of the same class.  On lookup at a node, if
733	>	* elements are not comparable or compare as 0, both left and
734	>	* right children may need to be searched in the case of tied hash
735	>	* values. (This corresponds to the full list search that would be
736	>	* necessary if all elements were non-Comparable and had tied
737	>	* hashes.)  The red-black balancing code is updated from
738	>	* pre-jdk-collections
739	>	* (http://gee.cs.oswego.edu/dl/classes/collections/RBCell.java)
740	>	* based in turn on Cormen, Leiserson, and Rivest "Introduction to
741	>	* Algorithms" (CLR).
742	>	*
743	>	* TreeBins also maintain a separate locking discipline than
744	>	* regular bins. Because they are forwarded via special MOVED
745	>	* nodes at bin heads (which can never change once established),
746	>	* we cannot use those nodes as locks. Instead, TreeBin
747	>	* extends AbstractQueuedSynchronizer to support a simple form of
748	>	* read-write lock. For update operations and table validation,
749	>	* the exclusive form of lock behaves in the same way as bin-head
750	>	* locks. However, lookups use shared read-lock mechanics to allow
751	>	* multiple readers in the absence of writers.  Additionally,
752	>	* these lookups do not ever block: While the lock is not
753	>	* available, they proceed along the slow traversal path (via
754	>	* next-pointers) until the lock becomes available or the list is
755	>	* exhausted, whichever comes first. (These cases are not fast,
756	>	* but maximize aggregate expected throughput.)  The AQS mechanics
757	>	* for doing this are straightforward.  The lock state is held as
758	>	* AQS getState().  Read counts are negative; the write count (1)
759	>	* is positive.  There are no signalling preferences among readers
760	>	* and writers. Since we don't need to export full Lock API, we
761	>	* just override the minimal AQS methods and use them directly.
762	>	*/
763	>	static final class TreeBin extends AbstractQueuedSynchronizer {
764	>	private static final long serialVersionUID = 2249069246763182397L;
765	>	transient TreeNode root;  // root of tree
766	>	transient TreeNode first; // head of next-pointer list
767
768	<	private static final void setTabAt(Node[] tab, int i, Node v) {
769	<	UNSAFE.putObjectVolatile(tab, ((long)i<<ASHIFT)+ABASE, v);
770	<	}
768	>	/* AQS overrides */
769	>	public final boolean isHeldExclusively() { return getState() > 0; }
770	>	public final boolean tryAcquire(int ignore) {
771	>	if (compareAndSetState(0, 1)) {
772	>	setExclusiveOwnerThread(Thread.currentThread());
773	>	return true;
774	>	}
775	>	return false;
776	>	}
777	>	public final boolean tryRelease(int ignore) {
778	>	setExclusiveOwnerThread(null);
779	>	setState(0);
780	>	return true;
781	>	}
782	>	public final int tryAcquireShared(int ignore) {
783	>	for (int c;;) {
784	>	if ((c = getState()) > 0)
785	>	return -1;
786	>	if (compareAndSetState(c, c -1))
787	>	return 1;
788	>	}
789	>	}
790	>	public final boolean tryReleaseShared(int ignore) {
791	>	int c;
792	>	do {} while (!compareAndSetState(c = getState(), c + 1));
793	>	return c == -1;
794	>	}
795	>
796	>	/** From CLR */
797	>	private void rotateLeft(TreeNode p) {
798	>	if (p != null) {
799	>	TreeNode r = p.right, pp, rl;
800	>	if ((rl = p.right = r.left) != null)
801	>	rl.parent = p;
802	>	if ((pp = r.parent = p.parent) == null)
803	>	root = r;
804	>	else if (pp.left == p)
805	>	pp.left = r;
806	>	else
807	>	pp.right = r;
808	>	r.left = p;
809	>	p.parent = r;
810	>	}
811	>	}
812
813	<	/* ---------------- Internal access and update methods -------------- */
813	>	/** From CLR */
814	>	private void rotateRight(TreeNode p) {
815	>	if (p != null) {
816	>	TreeNode l = p.left, pp, lr;
817	>	if ((lr = p.left = l.right) != null)
818	>	lr.parent = p;
819	>	if ((pp = l.parent = p.parent) == null)
820	>	root = l;
821	>	else if (pp.right == p)
822	>	pp.right = l;
823	>	else
824	>	pp.left = l;
825	>	l.right = p;
826	>	p.parent = l;
827	>	}
828	>	}
829
830	<	/**
831	<	* Applies a supplemental hash function to a given hashCode, which
832	<	* defends against poor quality hash functions.  The result must
833	<	* be have the top 2 bits clear. For reasonable performance, this
834	<	* function must have good avalanche properties; i.e., that each
835	<	* bit of the argument affects each bit of the result. (Although
836	<	* we don't care about the unused top 2 bits.)
830	>	/**
831	>	* Returns the TreeNode (or null if not found) for the given key
832	>	* starting at given root.
833	>	*/
834	>	@SuppressWarnings("unchecked") final TreeNode getTreeNode
835	>	(int h, Object k, TreeNode p) {
836	>	Class<?> c = k.getClass();
837	>	while (p != null) {
838	>	int dir, ph;  Object pk; Class<?> pc;
839	>	if ((ph = p.hash) == h) {
840	>	if ((pk = p.key) == k || k.equals(pk))
841	>	return p;
842	>	if (c != (pc = pk.getClass()) ||
843	>	!(k instanceof Comparable) ||
844	>	(dir = ((Comparable)k).compareTo((Comparable)pk)) == 0) {
845	>	dir = (c == pc) ? 0 : c.getName().compareTo(pc.getName());
846	>	TreeNode r = null, s = null, pl, pr;
847	>	if (dir >= 0) {
848	>	if ((pl = p.left) != null && h <= pl.hash)
849	>	s = pl;
850	>	}
851	>	else if ((pr = p.right) != null && h >= pr.hash)
852	>	s = pr;
853	>	if (s != null && (r = getTreeNode(h, k, s)) != null)
854	>	return r;
855	>	}
856	>	}
857	>	else
858	>	dir = (h < ph) ? -1 : 1;
859	>	p = (dir > 0) ? p.right : p.left;
860	>	}
861	>	return null;
862	>	}
863	>
864	>	/**
865	>	* Wrapper for getTreeNode used by CHM.get. Tries to obtain
866	>	* read-lock to call getTreeNode, but during failure to get
867	>	* lock, searches along next links.
868	>	*/
869	>	final Object getValue(int h, Object k) {
870	>	Node r = null;
871	>	int c = getState(); // Must read lock state first
872	>	for (Node e = first; e != null; e = e.next) {
873	>	if (c <= 0 && compareAndSetState(c, c - 1)) {
874	>	try {
875	>	r = getTreeNode(h, k, root);
876	>	} finally {
877	>	releaseShared(0);
878	>	}
879	>	break;
880	>	}
881	>	else if ((e.hash & HASH_BITS) == h && k.equals(e.key)) {
882	>	r = e;
883	>	break;
884	>	}
885	>	else
886	>	c = getState();
887	>	}
888	>	return r == null ? null : r.val;
889	>	}
890	>
891	>	/**
892	>	* Finds or adds a node.
893	>	* @return null if added
894	>	*/
895	>	@SuppressWarnings("unchecked") final TreeNode putTreeNode
896	>	(int h, Object k, Object v) {
897	>	Class<?> c = k.getClass();
898	>	TreeNode pp = root, p = null;
899	>	int dir = 0;
900	>	while (pp != null) { // find existing node or leaf to insert at
901	>	int ph;  Object pk; Class<?> pc;
902	>	p = pp;
903	>	if ((ph = p.hash) == h) {
904	>	if ((pk = p.key) == k || k.equals(pk))
905	>	return p;
906	>	if (c != (pc = pk.getClass()) ||
907	>	!(k instanceof Comparable) ||
908	>	(dir = ((Comparable)k).compareTo((Comparable)pk)) == 0) {
909	>	dir = (c == pc) ? 0 : c.getName().compareTo(pc.getName());
910	>	TreeNode r = null, s = null, pl, pr;
911	>	if (dir >= 0) {
912	>	if ((pl = p.left) != null && h <= pl.hash)
913	>	s = pl;
914	>	}
915	>	else if ((pr = p.right) != null && h >= pr.hash)
916	>	s = pr;
917	>	if (s != null && (r = getTreeNode(h, k, s)) != null)
918	>	return r;
919	>	}
920	>	}
921	>	else
922	>	dir = (h < ph) ? -1 : 1;
923	>	pp = (dir > 0) ? p.right : p.left;
924	>	}
925	>
926	>	TreeNode f = first;
927	>	TreeNode x = first = new TreeNode(h, k, v, f, p);
928	>	if (p == null)
929	>	root = x;
930	>	else { // attach and rebalance; adapted from CLR
931	>	TreeNode xp, xpp;
932	>	if (f != null)
933	>	f.prev = x;
934	>	if (dir <= 0)
935	>	p.left = x;
936	>	else
937	>	p.right = x;
938	>	x.red = true;
939	>	while (x != null && (xp = x.parent) != null && xp.red &&
940	>	(xpp = xp.parent) != null) {
941	>	TreeNode xppl = xpp.left;
942	>	if (xp == xppl) {
943	>	TreeNode y = xpp.right;
944	>	if (y != null && y.red) {
945	>	y.red = false;
946	>	xp.red = false;
947	>	xpp.red = true;
948	>	x = xpp;
949	>	}
950	>	else {
951	>	if (x == xp.right) {
952	>	rotateLeft(x = xp);
953	>	xpp = (xp = x.parent) == null ? null : xp.parent;
954	>	}
955	>	if (xp != null) {
956	>	xp.red = false;
957	>	if (xpp != null) {
958	>	xpp.red = true;
959	>	rotateRight(xpp);
960	>	}
961	>	}
962	>	}
963	>	}
964	>	else {
965	>	TreeNode y = xppl;
966	>	if (y != null && y.red) {
967	>	y.red = false;
968	>	xp.red = false;
969	>	xpp.red = true;
970	>	x = xpp;
971	>	}
972	>	else {
973	>	if (x == xp.left) {
974	>	rotateRight(x = xp);
975	>	xpp = (xp = x.parent) == null ? null : xp.parent;
976	>	}
977	>	if (xp != null) {
978	>	xp.red = false;
979	>	if (xpp != null) {
980	>	xpp.red = true;
981	>	rotateLeft(xpp);
982	>	}
983	>	}
984	>	}
985	>	}
986	>	}
987	>	TreeNode r = root;
988	>	if (r != null && r.red)
989	>	r.red = false;
990	>	}
991	>	return null;
992	>	}
993	>
994	>	/**
995	>	* Removes the given node, that must be present before this
996	>	* call.  This is messier than typical red-black deletion code
997	>	* because we cannot swap the contents of an interior node
998	>	* with a leaf successor that is pinned by "next" pointers
999	>	* that are accessible independently of lock. So instead we
1000	>	* swap the tree linkages.
1001	>	*/
1002	>	final void deleteTreeNode(TreeNode p) {
1003	>	TreeNode next = (TreeNode)p.next; // unlink traversal pointers
1004	>	TreeNode pred = p.prev;
1005	>	if (pred == null)
1006	>	first = next;
1007	>	else
1008	>	pred.next = next;
1009	>	if (next != null)
1010	>	next.prev = pred;
1011	>	TreeNode replacement;
1012	>	TreeNode pl = p.left;
1013	>	TreeNode pr = p.right;
1014	>	if (pl != null && pr != null) {
1015	>	TreeNode s = pr, sl;
1016	>	while ((sl = s.left) != null) // find successor
1017	>	s = sl;
1018	>	boolean c = s.red; s.red = p.red; p.red = c; // swap colors
1019	>	TreeNode sr = s.right;
1020	>	TreeNode pp = p.parent;
1021	>	if (s == pr) { // p was s's direct parent
1022	>	p.parent = s;
1023	>	s.right = p;
1024	>	}
1025	>	else {
1026	>	TreeNode sp = s.parent;
1027	>	if ((p.parent = sp) != null) {
1028	>	if (s == sp.left)
1029	>	sp.left = p;
1030	>	else
1031	>	sp.right = p;
1032	>	}
1033	>	if ((s.right = pr) != null)
1034	>	pr.parent = s;
1035	>	}
1036	>	p.left = null;
1037	>	if ((p.right = sr) != null)
1038	>	sr.parent = p;
1039	>	if ((s.left = pl) != null)
1040	>	pl.parent = s;
1041	>	if ((s.parent = pp) == null)
1042	>	root = s;
1043	>	else if (p == pp.left)
1044	>	pp.left = s;
1045	>	else
1046	>	pp.right = s;
1047	>	replacement = sr;
1048	>	}
1049	>	else
1050	>	replacement = (pl != null) ? pl : pr;
1051	>	TreeNode pp = p.parent;
1052	>	if (replacement == null) {
1053	>	if (pp == null) {
1054	>	root = null;
1055	>	return;
1056	>	}
1057	>	replacement = p;
1058	>	}
1059	>	else {
1060	>	replacement.parent = pp;
1061	>	if (pp == null)
1062	>	root = replacement;
1063	>	else if (p == pp.left)
1064	>	pp.left = replacement;
1065	>	else
1066	>	pp.right = replacement;
1067	>	p.left = p.right = p.parent = null;
1068	>	}
1069	>	if (!p.red) { // rebalance, from CLR
1070	>	TreeNode x = replacement;
1071	>	while (x != null) {
1072	>	TreeNode xp, xpl;
1073	>	if (x.red || (xp = x.parent) == null) {
1074	>	x.red = false;
1075	>	break;
1076	>	}
1077	>	if (x == (xpl = xp.left)) {
1078	>	TreeNode sib = xp.right;
1079	>	if (sib != null && sib.red) {
1080	>	sib.red = false;
1081	>	xp.red = true;
1082	>	rotateLeft(xp);
1083	>	sib = (xp = x.parent) == null ? null : xp.right;
1084	>	}
1085	>	if (sib == null)
1086	>	x = xp;
1087	>	else {
1088	>	TreeNode sl = sib.left, sr = sib.right;
1089	>	if ((sr == null || !sr.red) &&
1090	>	(sl == null || !sl.red)) {
1091	>	sib.red = true;
1092	>	x = xp;
1093	>	}
1094	>	else {
1095	>	if (sr == null || !sr.red) {
1096	>	if (sl != null)
1097	>	sl.red = false;
1098	>	sib.red = true;
1099	>	rotateRight(sib);
1100	>	sib = (xp = x.parent) == null ? null : xp.right;
1101	>	}
1102	>	if (sib != null) {
1103	>	sib.red = (xp == null) ? false : xp.red;
1104	>	if ((sr = sib.right) != null)
1105	>	sr.red = false;
1106	>	}
1107	>	if (xp != null) {
1108	>	xp.red = false;
1109	>	rotateLeft(xp);
1110	>	}
1111	>	x = root;
1112	>	}
1113	>	}
1114	>	}
1115	>	else { // symmetric
1116	>	TreeNode sib = xpl;
1117	>	if (sib != null && sib.red) {
1118	>	sib.red = false;
1119	>	xp.red = true;
1120	>	rotateRight(xp);
1121	>	sib = (xp = x.parent) == null ? null : xp.left;
1122	>	}
1123	>	if (sib == null)
1124	>	x = xp;
1125	>	else {
1126	>	TreeNode sl = sib.left, sr = sib.right;
1127	>	if ((sl == null || !sl.red) &&
1128	>	(sr == null || !sr.red)) {
1129	>	sib.red = true;
1130	>	x = xp;
1131	>	}
1132	>	else {
1133	>	if (sl == null || !sl.red) {
1134	>	if (sr != null)
1135	>	sr.red = false;
1136	>	sib.red = true;
1137	>	rotateLeft(sib);
1138	>	sib = (xp = x.parent) == null ? null : xp.left;
1139	>	}
1140	>	if (sib != null) {
1141	>	sib.red = (xp == null) ? false : xp.red;
1142	>	if ((sl = sib.left) != null)
1143	>	sl.red = false;
1144	>	}
1145	>	if (xp != null) {
1146	>	xp.red = false;
1147	>	rotateRight(xp);
1148	>	}
1149	>	x = root;
1150	>	}
1151	>	}
1152	>	}
1153	>	}
1154	>	}
1155	>	if (p == replacement && (pp = p.parent) != null) {
1156	>	if (p == pp.left) // detach pointers
1157	>	pp.left = null;
1158	>	else if (p == pp.right)
1159	>	pp.right = null;
1160	>	p.parent = null;
1161	>	}
1162	>	}
1163	>	}
1164	>
1165	>	/* ---------------- Collision reduction methods -------------- */
1166	>
1167	>	/**
1168	>	* Spreads higher bits to lower, and also forces top 2 bits to 0.
1169	>	* Because the table uses power-of-two masking, sets of hashes
1170	>	* that vary only in bits above the current mask will always
1171	>	* collide. (Among known examples are sets of Float keys holding
1172	>	* consecutive whole numbers in small tables.)  To counter this,
1173	>	* we apply a transform that spreads the impact of higher bits
1174	>	* downward. There is a tradeoff between speed, utility, and
1175	>	* quality of bit-spreading. Because many common sets of hashes
1176	>	* are already reasonably distributed across bits (so don't benefit
1177	>	* from spreading), and because we use trees to handle large sets
1178	>	* of collisions in bins, we don't need excessively high quality.
1179		*/
1180		private static final int spread(int h) {
1181	<	// Apply base step of MurmurHash; see http://code.google.com/p/smhasher/
1182	<	// Despite two multiplies, this is often faster than others
1183	<	// with comparable bit-spread properties.
1184	<	h ^= h >>> 16;
1185	<	h *= 0x85ebca6b;
1186	<	h ^= h >>> 13;
1187	<	h *= 0xc2b2ae35;
1188	<	return ((h >>> 16) ^ h) & HASH_BITS; // mask out top bits
1181	>	h ^= (h >>> 18) ^ (h >>> 12);
1182	>	return (h ^ (h >>> 10)) & HASH_BITS;
1183	>	}
1184	>
1185	>	/**
1186	>	* Replaces a list bin with a tree bin. Call only when locked.
1187	>	* Fails to replace if the given key is non-comparable or table
1188	>	* is, or needs, resizing.
1189	>	*/
1190	>	private final void replaceWithTreeBin(Node[] tab, int index, Object key) {
1191	>	if ((key instanceof Comparable) &&
1192	>	(tab.length >= MAXIMUM_CAPACITY || counter.sum() < (long)sizeCtl)) {
1193	>	TreeBin t = new TreeBin();
1194	>	for (Node e = tabAt(tab, index); e != null; e = e.next)
1195	>	t.putTreeNode(e.hash & HASH_BITS, e.key, e.val);
1196	>	setTabAt(tab, index, new Node(MOVED, t, null, null));
1197	>	}
1198		}
1199
1200	+	/* ---------------- Internal access and update methods -------------- */
1201	+
1202		/** Implementation for get and containsKey */
1203		private final Object internalGet(Object k) {
1204		int h = spread(k.hashCode());
1205		retry: for (Node[] tab = table; tab != null;) {
1206	<	Node e; Object ek, ev; int eh;    // locals to read fields once
1206	>	Node e, p; Object ek, ev; int eh;      // locals to read fields once
1207		for (e = tabAt(tab, (tab.length - 1) & h); e != null; e = e.next) {
1208		if ((eh = e.hash) == MOVED) {
1209	<	tab = (Node[])e.key;      // restart with new table
1210	<	continue retry;
1209	>	if ((ek = e.key) instanceof TreeBin)  // search TreeBin
1210	>	return ((TreeBin)ek).getValue(h, k);
1211	>	else {                        // restart with new table
1212	>	tab = (Node[])ek;
1213	>	continue retry;
1214	>	}
1215		}
1216	<	if ((eh & HASH_BITS) == h && (ev = e.val) != null &&
1217	<	((ek = e.key) == k || k.equals(ek)))
1216	>	else if ((eh & HASH_BITS) == h && (ev = e.val) != null &&
1217	>	((ek = e.key) == k || k.equals(ek)))
1218		return ev;
1219		}
1220		break;
#	Line 551 | Line 1231 | public class ConcurrentHashMapV8<K, V>
1231		int h = spread(k.hashCode());
1232		Object oldVal = null;
1233		for (Node[] tab = table;;) {
1234	<	Node f; int i, fh;
1234	>	Node f; int i, fh; Object fk;
1235		if (tab == null ||
1236		(f = tabAt(tab, i = (tab.length - 1) & h)) == null)
1237		break;
1238	<	else if ((fh = f.hash) == MOVED)
1239	<	tab = (Node[])f.key;
1238	>	else if ((fh = f.hash) == MOVED) {
1239	>	if ((fk = f.key) instanceof TreeBin) {
1240	>	TreeBin t = (TreeBin)fk;
1241	>	boolean validated = false;
1242	>	boolean deleted = false;
1243	>	t.acquire(0);
1244	>	try {
1245	>	if (tabAt(tab, i) == f) {
1246	>	validated = true;
1247	>	TreeNode p = t.getTreeNode(h, k, t.root);
1248	>	if (p != null) {
1249	>	Object pv = p.val;
1250	>	if (cv == null || cv == pv || cv.equals(pv)) {
1251	>	oldVal = pv;
1252	>	if ((p.val = v) == null) {
1253	>	deleted = true;
1254	>	t.deleteTreeNode(p);
1255	>	}
1256	>	}
1257	>	}
1258	>	}
1259	>	} finally {
1260	>	t.release(0);
1261	>	}
1262	>	if (validated) {
1263	>	if (deleted)
1264	>	counter.add(-1L);
1265	>	break;
1266	>	}
1267	>	}
1268	>	else
1269	>	tab = (Node[])fk;
1270	>	}
1271		else if ((fh & HASH_BITS) != h && f.next == null) // precheck
1272		break;                          // rules out possible existence
1273		else if ((fh & LOCKED) != 0) {
#	Line 609 | Line 1320 | public class ConcurrentHashMapV8<K, V>
1320		}
1321
1322		/*
1323	<	* Internal versions of the five insertion methods, each a
1323	>	* Internal versions of the six insertion methods, each a
1324		* little more complicated than the last. All have
1325		* the same basic structure as the first (internalPut):
1326		*  1. If table uninitialized, create
1327		*  2. If bin empty, try to CAS new node
1328		*  3. If bin stale, use new table
1329	<	*  4. Lock and validate; if valid, scan and add or update
1329	>	*  4. if bin converted to TreeBin, validate and relay to TreeBin methods
1330	>	*  5. Lock and validate; if valid, scan and add or update
1331		*
1332		* The others interweave other checks and/or alternative actions:
1333		*  * Plain put checks for and performs resize after insertion.
#	Line 626 | Line 1338 | public class ConcurrentHashMapV8<K, V>
1338		*    returns from function call.
1339		*  * compute uses the same function-call mechanics, but without
1340		*    the prescans
1341	+	*  * merge acts as putIfAbsent in the absent case, but invokes the
1342	+	*    update function if present
1343		*  * putAll attempts to pre-allocate enough table space
1344		*    and more lazily performs count updates and checks.
1345		*
#	Line 636 | Line 1350 | public class ConcurrentHashMapV8<K, V>
1350		/** Implementation for put */
1351		private final Object internalPut(Object k, Object v) {
1352		int h = spread(k.hashCode());
1353	<	boolean checkSize = false;
1353	>	int count = 0;
1354		for (Node[] tab = table;;) {
1355	<	int i; Node f; int fh;
1355	>	int i; Node f; int fh; Object fk;
1356		if (tab == null)
1357		tab = initTable();
1358		else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) {
1359		if (casTabAt(tab, i, null, new Node(h, k, v, null)))
1360		break;                   // no lock when adding to empty bin
1361		}
1362	<	else if ((fh = f.hash) == MOVED)
1363	<	tab = (Node[])f.key;
1362	>	else if ((fh = f.hash) == MOVED) {
1363	>	if ((fk = f.key) instanceof TreeBin) {
1364	>	TreeBin t = (TreeBin)fk;
1365	>	Object oldVal = null;
1366	>	t.acquire(0);
1367	>	try {
1368	>	if (tabAt(tab, i) == f) {
1369	>	count = 2;
1370	>	TreeNode p = t.putTreeNode(h, k, v);
1371	>	if (p != null) {
1372	>	oldVal = p.val;
1373	>	p.val = v;
1374	>	}
1375	>	}
1376	>	} finally {
1377	>	t.release(0);
1378	>	}
1379	>	if (count != 0) {
1380	>	if (oldVal != null)
1381	>	return oldVal;
1382	>	break;
1383	>	}
1384	>	}
1385	>	else
1386	>	tab = (Node[])fk;
1387	>	}
1388		else if ((fh & LOCKED) != 0) {
1389		checkForResize();
1390		f.tryAwaitLock(tab, i);
1391		}
1392		else if (f.casHash(fh, fh | LOCKED)) {
1393		Object oldVal = null;
656	–	boolean validated = false;
1394		try {                        // needed in case equals() throws
1395		if (tabAt(tab, i) == f) {
1396	<	validated = true;    // retry if 1st already deleted
1397	<	for (Node e = f;;) {
1396	>	count = 1;
1397	>	for (Node e = f;; ++count) {
1398		Object ek, ev;
1399		if ((e.hash & HASH_BITS) == h &&
1400		(ev = e.val) != null &&
#	Line 669 | Line 1406 | public class ConcurrentHashMapV8<K, V>
1406		Node last = e;
1407		if ((e = e.next) == null) {
1408		last.next = new Node(h, k, v, null);
1409	<	if (last != f || tab.length <= 64)
1410	<	checkSize = true;
1409	>	if (count >= TREE_THRESHOLD)
1410	>	replaceWithTreeBin(tab, i, k);
1411		break;
1412		}
1413		}
#	Line 681 | Line 1418 | public class ConcurrentHashMapV8<K, V>
1418		synchronized (f) { f.notifyAll(); };
1419		}
1420		}
1421	<	if (validated) {
1421	>	if (count != 0) {
1422		if (oldVal != null)
1423		return oldVal;
1424	+	if (tab.length <= 64)
1425	+	count = 2;
1426		break;
1427		}
1428		}
1429		}
1430		counter.add(1L);
1431	<	if (checkSize)
1431	>	if (count > 1)
1432		checkForResize();
1433		return null;
1434		}
#	Line 697 | Line 1436 | public class ConcurrentHashMapV8<K, V>
1436		/** Implementation for putIfAbsent */
1437		private final Object internalPutIfAbsent(Object k, Object v) {
1438		int h = spread(k.hashCode());
1439	+	int count = 0;
1440		for (Node[] tab = table;;) {
1441		int i; Node f; int fh; Object fk, fv;
1442		if (tab == null)
#	Line 705 | Line 1445 | public class ConcurrentHashMapV8<K, V>
1445		if (casTabAt(tab, i, null, new Node(h, k, v, null)))
1446		break;
1447		}
1448	<	else if ((fh = f.hash) == MOVED)
1449	<	tab = (Node[])f.key;
1448	>	else if ((fh = f.hash) == MOVED) {
1449	>	if ((fk = f.key) instanceof TreeBin) {
1450	>	TreeBin t = (TreeBin)fk;
1451	>	Object oldVal = null;
1452	>	t.acquire(0);
1453	>	try {
1454	>	if (tabAt(tab, i) == f) {
1455	>	count = 2;
1456	>	TreeNode p = t.putTreeNode(h, k, v);
1457	>	if (p != null)
1458	>	oldVal = p.val;
1459	>	}
1460	>	} finally {
1461	>	t.release(0);
1462	>	}
1463	>	if (count != 0) {
1464	>	if (oldVal != null)
1465	>	return oldVal;
1466	>	break;
1467	>	}
1468	>	}
1469	>	else
1470	>	tab = (Node[])fk;
1471	>	}
1472		else if ((fh & HASH_BITS) == h && (fv = f.val) != null &&
1473		((fk = f.key) == k || k.equals(fk)))
1474		return fv;
#	Line 730 | Line 1492 | public class ConcurrentHashMapV8<K, V>
1492		}
1493		else if (tabAt(tab, i) == f && f.casHash(fh, fh | LOCKED)) {
1494		Object oldVal = null;
733	–	boolean validated = false;
1495		try {
1496		if (tabAt(tab, i) == f) {
1497	<	validated = true;
1498	<	for (Node e = f;;) {
1497	>	count = 1;
1498	>	for (Node e = f;; ++count) {
1499		Object ek, ev;
1500		if ((e.hash & HASH_BITS) == h &&
1501		(ev = e.val) != null &&
#	Line 745 | Line 1506 | public class ConcurrentHashMapV8<K, V>
1506		Node last = e;
1507		if ((e = e.next) == null) {
1508		last.next = new Node(h, k, v, null);
1509	+	if (count >= TREE_THRESHOLD)
1510	+	replaceWithTreeBin(tab, i, k);
1511		break;
1512		}
1513		}
#	Line 755 | Line 1518 | public class ConcurrentHashMapV8<K, V>
1518		synchronized (f) { f.notifyAll(); };
1519		}
1520		}
1521	<	if (validated) {
1521	>	if (count != 0) {
1522		if (oldVal != null)
1523		return oldVal;
1524	+	if (tab.length <= 64)
1525	+	count = 2;
1526		break;
1527		}
1528		}
1529		}
1530		}
1531		counter.add(1L);
1532	+	if (count > 1)
1533	+	checkForResize();
1534		return null;
1535		}
1536
1537		/** Implementation for computeIfAbsent */
1538		private final Object internalComputeIfAbsent(K k,
1539	<	MappingFunction<? super K, ?> mf) {
1539	>	Fun<? super K, ?> mf) {
1540		int h = spread(k.hashCode());
1541		Object val = null;
1542	+	int count = 0;
1543		for (Node[] tab = table;;) {
1544		Node f; int i, fh; Object fk, fv;
1545		if (tab == null)
1546		tab = initTable();
1547		else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) {
1548		Node node = new Node(fh = h | LOCKED, k, null, null);
781	–	boolean validated = false;
1549		if (casTabAt(tab, i, null, node)) {
1550	<	validated = true;
1550	>	count = 1;
1551		try {
1552	<	if ((val = mf.map(k)) != null)
1552	>	if ((val = mf.apply(k)) != null)
1553		node.val = val;
1554		} finally {
1555		if (val == null)
#	Line 793 | Line 1560 | public class ConcurrentHashMapV8<K, V>
1560		}
1561		}
1562		}
1563	<	if (validated)
1563	>	if (count != 0)
1564		break;
1565		}
1566	<	else if ((fh = f.hash) == MOVED)
1567	<	tab = (Node[])f.key;
1566	>	else if ((fh = f.hash) == MOVED) {
1567	>	if ((fk = f.key) instanceof TreeBin) {
1568	>	TreeBin t = (TreeBin)fk;
1569	>	boolean added = false;
1570	>	t.acquire(0);
1571	>	try {
1572	>	if (tabAt(tab, i) == f) {
1573	>	count = 1;
1574	>	TreeNode p = t.getTreeNode(h, k, t.root);
1575	>	if (p != null)
1576	>	val = p.val;
1577	>	else if ((val = mf.apply(k)) != null) {
1578	>	added = true;
1579	>	count = 2;
1580	>	t.putTreeNode(h, k, val);
1581	>	}
1582	>	}
1583	>	} finally {
1584	>	t.release(0);
1585	>	}
1586	>	if (count != 0) {
1587	>	if (!added)
1588	>	return val;
1589	>	break;
1590	>	}
1591	>	}
1592	>	else
1593	>	tab = (Node[])fk;
1594	>	}
1595		else if ((fh & HASH_BITS) == h && (fv = f.val) != null &&
1596		((fk = f.key) == k || k.equals(fk)))
1597		return fv;
#	Line 820 | Line 1614 | public class ConcurrentHashMapV8<K, V>
1614		f.tryAwaitLock(tab, i);
1615		}
1616		else if (tabAt(tab, i) == f && f.casHash(fh, fh | LOCKED)) {
1617	<	boolean validated = false;
1617	>	boolean added = false;
1618		try {
1619		if (tabAt(tab, i) == f) {
1620	<	validated = true;
1621	<	for (Node e = f;;) {
1620	>	count = 1;
1621	>	for (Node e = f;; ++count) {
1622		Object ek, ev;
1623		if ((e.hash & HASH_BITS) == h &&
1624		(ev = e.val) != null &&
#	Line 834 | Line 1628 | public class ConcurrentHashMapV8<K, V>
1628		}
1629		Node last = e;
1630		if ((e = e.next) == null) {
1631	<	if ((val = mf.map(k)) != null)
1631	>	if ((val = mf.apply(k)) != null) {
1632	>	added = true;
1633		last.next = new Node(h, k, val, null);
1634	+	if (count >= TREE_THRESHOLD)
1635	+	replaceWithTreeBin(tab, i, k);
1636	+	}
1637		break;
1638		}
1639		}
#	Line 846 | Line 1644 | public class ConcurrentHashMapV8<K, V>
1644		synchronized (f) { f.notifyAll(); };
1645		}
1646		}
1647	<	if (validated)
1647	>	if (count != 0) {
1648	>	if (!added)
1649	>	return val;
1650	>	if (tab.length <= 64)
1651	>	count = 2;
1652		break;
1653	+	}
1654		}
1655		}
1656		}
1657	<	if (val == null)
1658	<	throw new NullPointerException();
1659	<	counter.add(1L);
1657	>	if (val != null) {
1658	>	counter.add(1L);
1659	>	if (count > 1)
1660	>	checkForResize();
1661	>	}
1662		return val;
1663		}
1664
1665		/** Implementation for compute */
1666	<	@SuppressWarnings("unchecked")
1667	<	private final Object internalCompute(K k,
863	<	RemappingFunction<? super K, V> mf) {
1666	>	@SuppressWarnings("unchecked") private final Object internalCompute
1667	>	(K k, boolean onlyIfPresent, BiFun<? super K, ? super V, ? extends V> mf) {
1668		int h = spread(k.hashCode());
1669		Object val = null;
1670	<	boolean added = false;
1671	<	boolean checkSize = false;
1670	>	int delta = 0;
1671	>	int count = 0;
1672		for (Node[] tab = table;;) {
1673	<	Node f; int i, fh;
1673	>	Node f; int i, fh; Object fk;
1674		if (tab == null)
1675		tab = initTable();
1676		else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) {
1677	+	if (onlyIfPresent)
1678	+	break;
1679		Node node = new Node(fh = h | LOCKED, k, null, null);
874	–	boolean validated = false;
1680		if (casTabAt(tab, i, null, node)) {
876	–	validated = true;
1681		try {
1682	<	if ((val = mf.remap(k, null)) != null) {
1682	>	count = 1;
1683	>	if ((val = mf.apply(k, null)) != null) {
1684		node.val = val;
1685	<	added = true;
1685	>	delta = 1;
1686		}
1687		} finally {
1688	<	if (!added)
1688	>	if (delta == 0)
1689		setTabAt(tab, i, null);
1690		if (!node.casHash(fh, h)) {
1691		node.hash = h;
#	Line 888 | Line 1693 | public class ConcurrentHashMapV8<K, V>
1693		}
1694		}
1695		}
1696	<	if (validated)
1696	>	if (count != 0)
1697		break;
1698		}
1699	<	else if ((fh = f.hash) == MOVED)
1700	<	tab = (Node[])f.key;
1699	>	else if ((fh = f.hash) == MOVED) {
1700	>	if ((fk = f.key) instanceof TreeBin) {
1701	>	TreeBin t = (TreeBin)fk;
1702	>	t.acquire(0);
1703	>	try {
1704	>	if (tabAt(tab, i) == f) {
1705	>	count = 1;
1706	>	TreeNode p = t.getTreeNode(h, k, t.root);
1707	>	Object pv = (p == null) ? null : p.val;
1708	>	if ((val = mf.apply(k, (V)pv)) != null) {
1709	>	if (p != null)
1710	>	p.val = val;
1711	>	else {
1712	>	count = 2;
1713	>	delta = 1;
1714	>	t.putTreeNode(h, k, val);
1715	>	}
1716	>	}
1717	>	else if (p != null) {
1718	>	delta = -1;
1719	>	t.deleteTreeNode(p);
1720	>	}
1721	>	}
1722	>	} finally {
1723	>	t.release(0);
1724	>	}
1725	>	if (count != 0)
1726	>	break;
1727	>	}
1728	>	else
1729	>	tab = (Node[])fk;
1730	>	}
1731		else if ((fh & LOCKED) != 0) {
1732		checkForResize();
1733		f.tryAwaitLock(tab, i);
1734		}
1735		else if (f.casHash(fh, fh | LOCKED)) {
901	–	boolean validated = false;
1736		try {
1737		if (tabAt(tab, i) == f) {
1738	<	validated = true;
1739	<	for (Node e = f;;) {
1738	>	count = 1;
1739	>	for (Node e = f, pred = null;; ++count) {
1740		Object ek, ev;
1741		if ((e.hash & HASH_BITS) == h &&
1742		(ev = e.val) != null &&
1743		((ek = e.key) == k || k.equals(ek))) {
1744	<	val = mf.remap(k, (V)ev);
1744	>	val = mf.apply(k, (V)ev);
1745		if (val != null)
1746		e.val = val;
1747	+	else {
1748	+	delta = -1;
1749	+	Node en = e.next;
1750	+	if (pred != null)
1751	+	pred.next = en;
1752	+	else
1753	+	setTabAt(tab, i, en);
1754	+	}
1755		break;
1756		}
1757	<	Node last = e;
1757	>	pred = e;
1758		if ((e = e.next) == null) {
1759	<	if ((val = mf.remap(k, null)) != null) {
1760	<	last.next = new Node(h, k, val, null);
1761	<	added = true;
1762	<	if (last != f || tab.length <= 64)
1763	<	checkSize = true;
1759	>	if (!onlyIfPresent && (val = mf.apply(k, null)) != null) {
1760	>	pred.next = new Node(h, k, val, null);
1761	>	delta = 1;
1762	>	if (count >= TREE_THRESHOLD)
1763	>	replaceWithTreeBin(tab, i, k);
1764		}
1765		break;
1766		}
#	Line 930 | Line 1772 | public class ConcurrentHashMapV8<K, V>
1772		synchronized (f) { f.notifyAll(); };
1773		}
1774		}
1775	<	if (validated)
1775	>	if (count != 0) {
1776	>	if (tab.length <= 64)
1777	>	count = 2;
1778		break;
1779	+	}
1780		}
1781		}
1782	<	if (val == null)
1783	<	throw new NullPointerException();
1784	<	if (added) {
1785	<	counter.add(1L);
1786	<	if (checkSize)
1782	>	if (delta != 0) {
1783	>	counter.add((long)delta);
1784	>	if (count > 1)
1785	>	checkForResize();
1786	>	}
1787	>	return val;
1788	>	}
1789	>
1790	>	/** Implementation for merge */
1791	>	@SuppressWarnings("unchecked") private final Object internalMerge
1792	>	(K k, V v, BiFun<? super V, ? super V, ? extends V> mf) {
1793	>	int h = spread(k.hashCode());
1794	>	Object val = null;
1795	>	int delta = 0;
1796	>	int count = 0;
1797	>	for (Node[] tab = table;;) {
1798	>	int i; Node f; int fh; Object fk, fv;
1799	>	if (tab == null)
1800	>	tab = initTable();
1801	>	else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) {
1802	>	if (casTabAt(tab, i, null, new Node(h, k, v, null))) {
1803	>	delta = 1;
1804	>	val = v;
1805	>	break;
1806	>	}
1807	>	}
1808	>	else if ((fh = f.hash) == MOVED) {
1809	>	if ((fk = f.key) instanceof TreeBin) {
1810	>	TreeBin t = (TreeBin)fk;
1811	>	t.acquire(0);
1812	>	try {
1813	>	if (tabAt(tab, i) == f) {
1814	>	count = 1;
1815	>	TreeNode p = t.getTreeNode(h, k, t.root);
1816	>	val = (p == null) ? v : mf.apply((V)p.val, v);
1817	>	if (val != null) {
1818	>	if (p != null)
1819	>	p.val = val;
1820	>	else {
1821	>	count = 2;
1822	>	delta = 1;
1823	>	t.putTreeNode(h, k, val);
1824	>	}
1825	>	}
1826	>	else if (p != null) {
1827	>	delta = -1;
1828	>	t.deleteTreeNode(p);
1829	>	}
1830	>	}
1831	>	} finally {
1832	>	t.release(0);
1833	>	}
1834	>	if (count != 0)
1835	>	break;
1836	>	}
1837	>	else
1838	>	tab = (Node[])fk;
1839	>	}
1840	>	else if ((fh & LOCKED) != 0) {
1841	>	checkForResize();
1842	>	f.tryAwaitLock(tab, i);
1843	>	}
1844	>	else if (f.casHash(fh, fh | LOCKED)) {
1845	>	try {
1846	>	if (tabAt(tab, i) == f) {
1847	>	count = 1;
1848	>	for (Node e = f, pred = null;; ++count) {
1849	>	Object ek, ev;
1850	>	if ((e.hash & HASH_BITS) == h &&
1851	>	(ev = e.val) != null &&
1852	>	((ek = e.key) == k || k.equals(ek))) {
1853	>	val = mf.apply(v, (V)ev);
1854	>	if (val != null)
1855	>	e.val = val;
1856	>	else {
1857	>	delta = -1;
1858	>	Node en = e.next;
1859	>	if (pred != null)
1860	>	pred.next = en;
1861	>	else
1862	>	setTabAt(tab, i, en);
1863	>	}
1864	>	break;
1865	>	}
1866	>	pred = e;
1867	>	if ((e = e.next) == null) {
1868	>	val = v;
1869	>	pred.next = new Node(h, k, val, null);
1870	>	delta = 1;
1871	>	if (count >= TREE_THRESHOLD)
1872	>	replaceWithTreeBin(tab, i, k);
1873	>	break;
1874	>	}
1875	>	}
1876	>	}
1877	>	} finally {
1878	>	if (!f.casHash(fh | LOCKED, fh)) {
1879	>	f.hash = fh;
1880	>	synchronized (f) { f.notifyAll(); };
1881	>	}
1882	>	}
1883	>	if (count != 0) {
1884	>	if (tab.length <= 64)
1885	>	count = 2;
1886	>	break;
1887	>	}
1888	>	}
1889	>	}
1890	>	if (delta != 0) {
1891	>	counter.add((long)delta);
1892	>	if (count > 1)
1893		checkForResize();
1894		}
1895		return val;
#	Line 959 | Line 1910 | public class ConcurrentHashMapV8<K, V>
1910		}
1911		int h = spread(k.hashCode());
1912		for (Node[] tab = table;;) {
1913	<	int i; Node f; int fh;
1913	>	int i; Node f; int fh; Object fk;
1914		if (tab == null)
1915		tab = initTable();
1916		else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null){
#	Line 968 | Line 1919 | public class ConcurrentHashMapV8<K, V>
1919		break;
1920		}
1921		}
1922	<	else if ((fh = f.hash) == MOVED)
1923	<	tab = (Node[])f.key;
1922	>	else if ((fh = f.hash) == MOVED) {
1923	>	if ((fk = f.key) instanceof TreeBin) {
1924	>	TreeBin t = (TreeBin)fk;
1925	>	boolean validated = false;
1926	>	t.acquire(0);
1927	>	try {
1928	>	if (tabAt(tab, i) == f) {
1929	>	validated = true;
1930	>	TreeNode p = t.getTreeNode(h, k, t.root);
1931	>	if (p != null)
1932	>	p.val = v;
1933	>	else {
1934	>	t.putTreeNode(h, k, v);
1935	>	++delta;
1936	>	}
1937	>	}
1938	>	} finally {
1939	>	t.release(0);
1940	>	}
1941	>	if (validated)
1942	>	break;
1943	>	}
1944	>	else
1945	>	tab = (Node[])fk;
1946	>	}
1947		else if ((fh & LOCKED) != 0) {
1948		counter.add(delta);
1949		delta = 0L;
#	Line 977 | Line 1951 | public class ConcurrentHashMapV8<K, V>
1951		f.tryAwaitLock(tab, i);
1952		}
1953		else if (f.casHash(fh, fh | LOCKED)) {
1954	<	boolean validated = false;
981	<	boolean tooLong = false;
1954	>	int count = 0;
1955		try {
1956		if (tabAt(tab, i) == f) {
1957	<	validated = true;
1958	<	for (Node e = f;;) {
1957	>	count = 1;
1958	>	for (Node e = f;; ++count) {
1959		Object ek, ev;
1960		if ((e.hash & HASH_BITS) == h &&
1961		(ev = e.val) != null &&
#	Line 994 | Line 1967 | public class ConcurrentHashMapV8<K, V>
1967		if ((e = e.next) == null) {
1968		++delta;
1969		last.next = new Node(h, k, v, null);
1970	+	if (count >= TREE_THRESHOLD)
1971	+	replaceWithTreeBin(tab, i, k);
1972		break;
1973		}
999	–	tooLong = true;
1974		}
1975		}
1976		} finally {
#	Line 1005 | Line 1979 | public class ConcurrentHashMapV8<K, V>
1979		synchronized (f) { f.notifyAll(); };
1980		}
1981		}
1982	<	if (validated) {
1983	<	if (tooLong) {
1982	>	if (count != 0) {
1983	>	if (count > 1) {
1984		counter.add(delta);
1985		delta = 0L;
1986		checkForResize();
#	Line 1145 | Line 2119 | public class ConcurrentHashMapV8<K, V>
2119		for (int i = bin;;) {      // start upwards sweep
2120		int fh; Node f;
2121		if ((f = tabAt(tab, i)) == null) {
2122	<	if (bin >= 0) {    // no lock needed (or available)
2122	>	if (bin >= 0) {    // Unbuffered; no lock needed (or available)
2123		if (!casTabAt(tab, i, f, fwd))
2124		continue;
2125		}
#	Line 1162 | Line 2136 | public class ConcurrentHashMapV8<K, V>
2136		}
2137		}
2138		}
2139	<	else if (((fh = f.hash) & LOCKED) == 0 && f.casHash(fh, fh|LOCKED)) {
2139	>	else if ((fh = f.hash) == MOVED) {
2140	>	Object fk = f.key;
2141	>	if (fk instanceof TreeBin) {
2142	>	TreeBin t = (TreeBin)fk;
2143	>	boolean validated = false;
2144	>	t.acquire(0);
2145	>	try {
2146	>	if (tabAt(tab, i) == f) {
2147	>	validated = true;
2148	>	splitTreeBin(nextTab, i, t);
2149	>	setTabAt(tab, i, fwd);
2150	>	}
2151	>	} finally {
2152	>	t.release(0);
2153	>	}
2154	>	if (!validated)
2155	>	continue;
2156	>	}
2157	>	}
2158	>	else if ((fh & LOCKED) == 0 && f.casHash(fh, fh|LOCKED)) {
2159		boolean validated = false;
2160		try {              // split to lo and hi lists; copying as needed
2161		if (tabAt(tab, i) == f) {
2162		validated = true;
2163	<	Node e = f, lastRun = f;
1171	<	Node lo = null, hi = null;
1172	<	int runBit = e.hash & n;
1173	<	for (Node p = e.next; p != null; p = p.next) {
1174	<	int b = p.hash & n;
1175	<	if (b != runBit) {
1176	<	runBit = b;
1177	<	lastRun = p;
1178	<	}
1179	<	}
1180	<	if (runBit == 0)
1181	<	lo = lastRun;
1182	<	else
1183	<	hi = lastRun;
1184	<	for (Node p = e; p != lastRun; p = p.next) {
1185	<	int ph = p.hash & HASH_BITS;
1186	<	Object pk = p.key, pv = p.val;
1187	<	if ((ph & n) == 0)
1188	<	lo = new Node(ph, pk, pv, lo);
1189	<	else
1190	<	hi = new Node(ph, pk, pv, hi);
1191	<	}
1192	<	setTabAt(nextTab, i, lo);
1193	<	setTabAt(nextTab, i + n, hi);
2163	>	splitBin(nextTab, i, f);
2164		setTabAt(tab, i, fwd);
2165		}
2166		} finally {
#	Line 1236 | Line 2206 | public class ConcurrentHashMapV8<K, V>
2206		}
2207
2208		/**
2209	+	* Splits a normal bin with list headed by e into lo and hi parts;
2210	+	* installs in given table.
2211	+	*/
2212	+	private static void splitBin(Node[] nextTab, int i, Node e) {
2213	+	int bit = nextTab.length >>> 1; // bit to split on
2214	+	int runBit = e.hash & bit;
2215	+	Node lastRun = e, lo = null, hi = null;
2216	+	for (Node p = e.next; p != null; p = p.next) {
2217	+	int b = p.hash & bit;
2218	+	if (b != runBit) {
2219	+	runBit = b;
2220	+	lastRun = p;
2221	+	}
2222	+	}
2223	+	if (runBit == 0)
2224	+	lo = lastRun;
2225	+	else
2226	+	hi = lastRun;
2227	+	for (Node p = e; p != lastRun; p = p.next) {
2228	+	int ph = p.hash & HASH_BITS;
2229	+	Object pk = p.key, pv = p.val;
2230	+	if ((ph & bit) == 0)
2231	+	lo = new Node(ph, pk, pv, lo);
2232	+	else
2233	+	hi = new Node(ph, pk, pv, hi);
2234	+	}
2235	+	setTabAt(nextTab, i, lo);
2236	+	setTabAt(nextTab, i + bit, hi);
2237	+	}
2238	+
2239	+	/**
2240	+	* Splits a tree bin into lo and hi parts; installs in given table.
2241	+	*/
2242	+	private static void splitTreeBin(Node[] nextTab, int i, TreeBin t) {
2243	+	int bit = nextTab.length >>> 1;
2244	+	TreeBin lt = new TreeBin();
2245	+	TreeBin ht = new TreeBin();
2246	+	int lc = 0, hc = 0;
2247	+	for (Node e = t.first; e != null; e = e.next) {
2248	+	int h = e.hash & HASH_BITS;
2249	+	Object k = e.key, v = e.val;
2250	+	if ((h & bit) == 0) {
2251	+	++lc;
2252	+	lt.putTreeNode(h, k, v);
2253	+	}
2254	+	else {
2255	+	++hc;
2256	+	ht.putTreeNode(h, k, v);
2257	+	}
2258	+	}
2259	+	Node ln, hn; // throw away trees if too small
2260	+	if (lc <= (TREE_THRESHOLD >>> 1)) {
2261	+	ln = null;
2262	+	for (Node p = lt.first; p != null; p = p.next)
2263	+	ln = new Node(p.hash, p.key, p.val, ln);
2264	+	}
2265	+	else
2266	+	ln = new Node(MOVED, lt, null, null);
2267	+	setTabAt(nextTab, i, ln);
2268	+	if (hc <= (TREE_THRESHOLD >>> 1)) {
2269	+	hn = null;
2270	+	for (Node p = ht.first; p != null; p = p.next)
2271	+	hn = new Node(p.hash, p.key, p.val, hn);
2272	+	}
2273	+	else
2274	+	hn = new Node(MOVED, ht, null, null);
2275	+	setTabAt(nextTab, i + bit, hn);
2276	+	}
2277	+
2278	+	/**
2279		* Implementation for clear. Steps through each bin, removing all
2280		* nodes.
2281		*/
#	Line 1244 | Line 2284 | public class ConcurrentHashMapV8<K, V>
2284		int i = 0;
2285		Node[] tab = table;
2286		while (tab != null && i < tab.length) {
2287	<	int fh;
2287	>	int fh; Object fk;
2288		Node f = tabAt(tab, i);
2289		if (f == null)
2290		++i;
2291	<	else if ((fh = f.hash) == MOVED)
2292	<	tab = (Node[])f.key;
2291	>	else if ((fh = f.hash) == MOVED) {
2292	>	if ((fk = f.key) instanceof TreeBin) {
2293	>	TreeBin t = (TreeBin)fk;
2294	>	t.acquire(0);
2295	>	try {
2296	>	if (tabAt(tab, i) == f) {
2297	>	for (Node p = t.first; p != null; p = p.next) {
2298	>	if (p.val != null) { // (currently always true)
2299	>	p.val = null;
2300	>	--delta;
2301	>	}
2302	>	}
2303	>	t.first = null;
2304	>	t.root = null;
2305	>	++i;
2306	>	}
2307	>	} finally {
2308	>	t.release(0);
2309	>	}
2310	>	}
2311	>	else
2312	>	tab = (Node[])fk;
2313	>	}
2314		else if ((fh & LOCKED) != 0) {
2315		counter.add(delta); // opportunistically update count
2316		delta = 0L;
2317		f.tryAwaitLock(tab, i);
2318		}
2319		else if (f.casHash(fh, fh | LOCKED)) {
1259	–	boolean validated = false;
2320		try {
2321		if (tabAt(tab, i) == f) {
1262	–	validated = true;
2322		for (Node e = f; e != null; e = e.next) {
2323	<	if (e.val != null) { // currently always true
2323	>	if (e.val != null) {  // (currently always true)
2324		e.val = null;
2325		--delta;
2326		}
2327		}
2328		setTabAt(tab, i, null);
2329	+	++i;
2330		}
2331		} finally {
2332		if (!f.casHash(fh | LOCKED, fh)) {
#	Line 1274 | Line 2334 | public class ConcurrentHashMapV8<K, V>
2334		synchronized (f) { f.notifyAll(); };
2335		}
2336		}
1277	–	if (validated)
1278	–	++i;
2337		}
2338		}
2339		if (delta != 0)
2340		counter.add(delta);
2341		}
2342
1285	–
2343		/* ----------------Table Traversal -------------- */
2344
2345		/**
2346		* Encapsulates traversal for methods such as containsValue; also
2347	<	* serves as a base class for other iterators.
2347	>	* serves as a base class for other iterators and bulk tasks.
2348		*
2349		* At each step, the iterator snapshots the key ("nextKey") and
2350		* value ("nextVal") of a valid node (i.e., one that, at point of
2351	<	* snapshot, has a nonnull user value). Because val fields can
2351	>	* snapshot, has a non-null user value). Because val fields can
2352		* change (including to null, indicating deletion), field nextVal
2353		* might not be accurate at point of use, but still maintains the
2354		* weak consistency property of holding a value that was once
2355	<	* valid.
2355	>	* valid. To support iterator.remove, the nextKey field is not
2356	>	* updated (nulled out) when the iterator cannot advance.
2357		*
2358		* Internal traversals directly access these fields, as in:
2359	<	* {@code while (it.next != null) { process(it.nextKey); it.advance(); }}
2359	>	* {@code while (it.advance() != null) { process(it.nextKey); }}
2360		*
2361	<	* Exported iterators (subclasses of ViewIterator) extract key,
2362	<	* value, or key-value pairs as return values of Iterator.next(),
2363	<	* and encapsulate the it.next check as hasNext();
2361	>	* Exported iterators must track whether the iterator has advanced
2362	>	* (in hasNext vs next) (by setting/checking/nulling field
2363	>	* nextVal), and then extract key, value, or key-value pairs as
2364	>	* return values of next().
2365		*
2366		* The iterator visits once each still-valid node that was
2367		* reachable upon iterator construction. It might miss some that
#	Line 1321 | Line 2380 | public class ConcurrentHashMapV8<K, V>
2380		* across threads, iteration terminates if a bounds checks fails
2381		* for a table read.
2382		*
2383	<	* The range-based constructor enables creation of parallel
2384	<	* range-splitting traversals. (Not yet implemented.)
2383	>	* This class extends ForkJoinTask to streamline parallel
2384	>	* iteration in bulk operations (see BulkTask). This adds only an
2385	>	* int of space overhead, which is close enough to negligible in
2386	>	* cases where it is not needed to not worry about it.  Because
2387	>	* ForkJoinTask is Serializable, but iterators need not be, we
2388	>	* need to add warning suppressions.
2389		*/
2390	<	static class InternalIterator {
2390	>	@SuppressWarnings("serial") static class Traverser<K,V,R> extends ForkJoinTask<R> {
2391	>	final ConcurrentHashMapV8<K, V> map;
2392		Node next;           // the next entry to use
1329	–	Node last;           // the last entry used
2393		Object nextKey;      // cached key field of next
2394		Object nextVal;      // cached val field of next
2395		Node[] tab;          // current table; updated if resized
2396		int index;           // index of bin to use next
2397		int baseIndex;       // current index of initial table
2398	<	final int baseLimit; // index bound for initial table
2399	<	final int baseSize;  // initial table size
2398	>	int baseLimit;       // index bound for initial table
2399	>	int baseSize;        // initial table size
2400
2401		/** Creates iterator for all entries in the table. */
2402	<	InternalIterator(Node[] tab) {
2403	<	this.tab = tab;
2404	<	baseLimit = baseSize = (tab == null) ? 0 : tab.length;
2405	<	index = baseIndex = 0;
2406	<	next = null;
2407	<	advance();
2408	<	}
2409	<
2410	<	/** Creates iterator for the given range of the table */
2411	<	InternalIterator(Node[] tab, int lo, int hi) {
2412	<	this.tab = tab;
2413	<	baseSize = (tab == null) ? 0 : tab.length;
2414	<	baseLimit = (hi <= baseSize) ? hi : baseSize;
2415	<	index = baseIndex = (lo >= 0) ? lo : 0;
2416	<	next = null;
2417	<	advance();
2418	<	}
2419	<
2420	<	/** Advances next. See above for explanation. */
2421	<	final void advance() {
2422	<	Node e = last = next;
2402	>	Traverser(ConcurrentHashMapV8<K, V> map) {
2403	>	this.map = map;
2404	>	}
2405	>
2406	>	/** Creates iterator for split() methods */
2407	>	Traverser(Traverser<K,V,?> it) {
2408	>	ConcurrentHashMapV8<K, V> m; Node[] t;
2409	>	if ((m = this.map = it.map) == null)
2410	>	t = null;
2411	>	else if ((t = it.tab) == null && // force parent tab initialization
2412	>	(t = it.tab = m.table) != null)
2413	>	it.baseLimit = it.baseSize = t.length;
2414	>	this.tab = t;
2415	>	this.baseSize = it.baseSize;
2416	>	it.baseLimit = this.index = this.baseIndex =
2417	>	((this.baseLimit = it.baseLimit) + it.baseIndex + 1) >>> 1;
2418	>	}
2419	>
2420	>	/**
2421	>	* Advances next; returns nextVal or null if terminated.
2422	>	* See above for explanation.
2423	>	*/
2424	>	final Object advance() {
2425	>	Node e = next;
2426	>	Object ev = null;
2427		outer: do {
2428		if (e != null)                  // advance past used/skipped node
2429		e = e.next;
2430		while (e == null) {             // get to next non-null bin
2431	<	Node[] t; int b, i, n;      // checks must use locals
2432	<	if ((b = baseIndex) >= baseLimit || (i = index) < 0 ||
2433	<	(t = tab) == null || i >= (n = t.length))
2431	>	ConcurrentHashMapV8<K, V> m;
2432	>	Node[] t; int b, i, n; Object ek; // checks must use locals
2433	>	if ((t = tab) != null)
2434	>	n = t.length;
2435	>	else if ((m = map) != null && (t = tab = m.table) != null)
2436	>	n = baseLimit = baseSize = t.length;
2437	>	else
2438	>	break outer;
2439	>	if ((b = baseIndex) >= baseLimit ||
2440	>	(i = index) < 0 || i >= n)
2441		break outer;
2442	<	else if ((e = tabAt(t, i)) != null && e.hash == MOVED)
2443	<	tab = (Node[])e.key;    // restarts due to null val
2444	<	else                        // visit upper slots if present
2445	<	index = (i += baseSize) < n ? i : (baseIndex = b + 1);
2442	>	if ((e = tabAt(t, i)) != null && e.hash == MOVED) {
2443	>	if ((ek = e.key) instanceof TreeBin)
2444	>	e = ((TreeBin)ek).first;
2445	>	else {
2446	>	tab = (Node[])ek;
2447	>	continue;           // restarts due to null val
2448	>	}
2449	>	}                           // visit upper slots if present
2450	>	index = (i += baseSize) < n ? i : (baseIndex = b + 1);
2451		}
2452		nextKey = e.key;
2453	<	} while ((nextVal = e.val) == null);// skip deleted or special nodes
2453	>	} while ((ev = e.val) == null);    // skip deleted or special nodes
2454		next = e;
2455	+	return nextVal = ev;
2456	+	}
2457	+
2458	+	public final void remove() {
2459	+	Object k = nextKey;
2460	+	if (k == null && (advance() == null || (k = nextKey) == null))
2461	+	throw new IllegalStateException();
2462	+	map.internalReplace(k, null, null);
2463		}
2464	+
2465	+	public final boolean hasNext() {
2466	+	return nextVal != null || advance() != null;
2467	+	}
2468	+
2469	+	public final boolean hasMoreElements() { return hasNext(); }
2470	+	public final void setRawResult(Object x) { }
2471	+	public R getRawResult() { return null; }
2472	+	public boolean exec() { return true; }
2473		}
2474
2475		/* ---------------- Public operations -------------- */
2476
2477		/**
2478	<	* Creates a new, empty map with the default initial table size (16),
2478	>	* Creates a new, empty map with the default initial table size (16).
2479		*/
2480		public ConcurrentHashMapV8() {
2481		this.counter = new LongAdder();
#	Line 1460 | Line 2556 | public class ConcurrentHashMapV8<K, V>
2556		if (initialCapacity < concurrencyLevel)   // Use at least as many bins
2557		initialCapacity = concurrencyLevel;   // as estimated threads
2558		long size = (long)(1.0 + (long)initialCapacity / loadFactor);
2559	<	int cap = ((size >= (long)MAXIMUM_CAPACITY) ?
2560	<	MAXIMUM_CAPACITY: tableSizeFor((int)size));
2559	>	int cap = (size >= (long)MAXIMUM_CAPACITY) ?
2560	>	MAXIMUM_CAPACITY : tableSizeFor((int)size);
2561		this.counter = new LongAdder();
2562		this.sizeCtl = cap;
2563		}
2564
2565		/**
2566	+	* Creates a new {@link Set} backed by a ConcurrentHashMapV8
2567	+	* from the given type to {@code Boolean.TRUE}.
2568	+	*
2569	+	* @return the new set
2570	+	*/
2571	+	public static <K> KeySetView<K,Boolean> newKeySet() {
2572	+	return new KeySetView<K,Boolean>(new ConcurrentHashMapV8<K,Boolean>(),
2573	+	Boolean.TRUE);
2574	+	}
2575	+
2576	+	/**
2577	+	* Creates a new {@link Set} backed by a ConcurrentHashMapV8
2578	+	* from the given type to {@code Boolean.TRUE}.
2579	+	*
2580	+	* @param initialCapacity The implementation performs internal
2581	+	* sizing to accommodate this many elements.
2582	+	* @throws IllegalArgumentException if the initial capacity of
2583	+	* elements is negative
2584	+	* @return the new set
2585	+	*/
2586	+	public static <K> KeySetView<K,Boolean> newKeySet(int initialCapacity) {
2587	+	return new KeySetView<K,Boolean>(new ConcurrentHashMapV8<K,Boolean>(initialCapacity),
2588	+	Boolean.TRUE);
2589	+	}
2590	+
2591	+	/**
2592		* {@inheritDoc}
2593		*/
2594		public boolean isEmpty() {
#	Line 1483 | Line 2605 | public class ConcurrentHashMapV8<K, V>
2605		(int)n);
2606		}
2607
2608	<	final long longSize() { // accurate version of size needed for views
2608	>	/**
2609	>	* Returns the number of mappings. This method should be used
2610	>	* instead of {@link #size} because a ConcurrentHashMapV8 may
2611	>	* contain more mappings than can be represented as an int. The
2612	>	* value returned is a snapshot; the actual count may differ if
2613	>	* there are ongoing concurrent insertions or removals.
2614	>	*
2615	>	* @return the number of mappings
2616	>	*/
2617	>	public long mappingCount() {
2618		long n = counter.sum();
2619	<	return (n < 0L) ? 0L : n;
2619	>	return (n < 0L) ? 0L : n; // ignore transient negative values
2620		}
2621
2622		/**
#	Line 1499 | Line 2630 | public class ConcurrentHashMapV8<K, V>
2630		*
2631		* @throws NullPointerException if the specified key is null
2632		*/
2633	<	@SuppressWarnings("unchecked")
1503	<	public V get(Object key) {
2633	>	@SuppressWarnings("unchecked") public V get(Object key) {
2634		if (key == null)
2635		throw new NullPointerException();
2636		return (V)internalGet(key);
2637		}
2638
2639		/**
2640	+	* Returns the value to which the specified key is mapped,
2641	+	* or the given defaultValue if this map contains no mapping for the key.
2642	+	*
2643	+	* @param key the key
2644	+	* @param defaultValue the value to return if this map contains
2645	+	* no mapping for the given key
2646	+	* @return the mapping for the key, if present; else the defaultValue
2647	+	* @throws NullPointerException if the specified key is null
2648	+	*/
2649	+	@SuppressWarnings("unchecked") public V getValueOrDefault(Object key, V defaultValue) {
2650	+	if (key == null)
2651	+	throw new NullPointerException();
2652	+	V v = (V) internalGet(key);
2653	+	return v == null ? defaultValue : v;
2654	+	}
2655	+
2656	+	/**
2657		* Tests if the specified object is a key in this table.
2658		*
2659		* @param  key   possible key
#	Line 1535 | Line 2682 | public class ConcurrentHashMapV8<K, V>
2682		if (value == null)
2683		throw new NullPointerException();
2684		Object v;
2685	<	InternalIterator it = new InternalIterator(table);
2686	<	while (it.next != null) {
2687	<	if ((v = it.nextVal) == value || value.equals(v))
2685	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
2686	>	while ((v = it.advance()) != null) {
2687	>	if (v == value || value.equals(v))
2688		return true;
1542	–	it.advance();
2689		}
2690		return false;
2691		}
#	Line 1576 | Line 2722 | public class ConcurrentHashMapV8<K, V>
2722		*         {@code null} if there was no mapping for {@code key}
2723		* @throws NullPointerException if the specified key or value is null
2724		*/
2725	<	@SuppressWarnings("unchecked")
1580	<	public V put(K key, V value) {
2725	>	@SuppressWarnings("unchecked") public V put(K key, V value) {
2726		if (key == null || value == null)
2727		throw new NullPointerException();
2728		return (V)internalPut(key, value);
#	Line 1590 | Line 2735 | public class ConcurrentHashMapV8<K, V>
2735		*         or {@code null} if there was no mapping for the key
2736		* @throws NullPointerException if the specified key or value is null
2737		*/
2738	<	@SuppressWarnings("unchecked")
1594	<	public V putIfAbsent(K key, V value) {
2738	>	@SuppressWarnings("unchecked") public V putIfAbsent(K key, V value) {
2739		if (key == null || value == null)
2740		throw new NullPointerException();
2741		return (V)internalPutIfAbsent(key, value);
#	Line 1610 | Line 2754 | public class ConcurrentHashMapV8<K, V>
2754
2755		/**
2756		* If the specified key is not already associated with a value,
2757	<	* computes its value using the given mappingFunction and
2758	<	* enters it into the map.  This is equivalent to
2757	>	* computes its value using the given mappingFunction and enters
2758	>	* it into the map unless null.  This is equivalent to
2759		* <pre> {@code
2760		* if (map.containsKey(key))
2761		*   return map.get(key);
2762	<	* value = mappingFunction.map(key);
2763	<	* map.put(key, value);
2762	>	* value = mappingFunction.apply(key);
2763	>	* if (value != null)
2764	>	*   map.put(key, value);
2765		* return value;}</pre>
2766		*
2767		* except that the action is performed atomically.  If the
2768	<	* function returns {@code null} (in which case a {@code
2769	<	* NullPointerException} is thrown), or the function itself throws
2770	<	* an (unchecked) exception, the exception is rethrown to its
2771	<	* caller, and no mapping is recorded.  Some attempted update
2772	<	* operations on this map by other threads may be blocked while
2773	<	* computation is in progress, so the computation should be short
2774	<	* and simple, and must not attempt to update any other mappings
2775	<	* of this Map. The most appropriate usage is to construct a new
2776	<	* object serving as an initial mapped value, or memoized result,
1632	<	* as in:
2768	>	* function returns {@code null} no mapping is recorded. If the
2769	>	* function itself throws an (unchecked) exception, the exception
2770	>	* is rethrown to its caller, and no mapping is recorded.  Some
2771	>	* attempted update operations on this map by other threads may be
2772	>	* blocked while computation is in progress, so the computation
2773	>	* should be short and simple, and must not attempt to update any
2774	>	* other mappings of this Map. The most appropriate usage is to
2775	>	* construct a new object serving as an initial mapped value, or
2776	>	* memoized result, as in:
2777		*
2778		*  <pre> {@code
2779	<	* map.computeIfAbsent(key, new MappingFunction<K, V>() {
2779	>	* map.computeIfAbsent(key, new Fun<K, V>() {
2780		*   public V map(K k) { return new Value(f(k)); }});}</pre>
2781		*
2782		* @param key key with which the specified value is to be associated
2783		* @param mappingFunction the function to compute a value
2784		* @return the current (existing or computed) value associated with
2785	<	*         the specified key.
2786	<	* @throws NullPointerException if the specified key, mappingFunction,
2787	<	*         or computed value is null
2785	>	*         the specified key, or null if the computed value is null
2786	>	* @throws NullPointerException if the specified key or mappingFunction
2787	>	*         is null
2788		* @throws IllegalStateException if the computation detectably
2789		*         attempts a recursive update to this map that would
2790		*         otherwise never complete
2791		* @throws RuntimeException or Error if the mappingFunction does so,
2792		*         in which case the mapping is left unestablished
2793		*/
2794	<	@SuppressWarnings("unchecked")
2795	<	public V computeIfAbsent(K key, MappingFunction<? super K, ? extends V> mappingFunction) {
2794	>	@SuppressWarnings("unchecked") public V computeIfAbsent
2795	>	(K key, Fun<? super K, ? extends V> mappingFunction) {
2796		if (key == null || mappingFunction == null)
2797		throw new NullPointerException();
2798		return (V)internalComputeIfAbsent(key, mappingFunction);
2799		}
2800
2801		/**
2802	<	* Computes and enters a new mapping value given a key and
2802	>	* If the given key is present, computes a new mapping value given a key and
2803	>	* its current mapped value. This is equivalent to
2804	>	*  <pre> {@code
2805	>	*   if (map.containsKey(key)) {
2806	>	*     value = remappingFunction.apply(key, map.get(key));
2807	>	*     if (value != null)
2808	>	*       map.put(key, value);
2809	>	*     else
2810	>	*       map.remove(key);
2811	>	*   }
2812	>	* }</pre>
2813	>	*
2814	>	* except that the action is performed atomically.  If the
2815	>	* function returns {@code null}, the mapping is removed.  If the
2816	>	* function itself throws an (unchecked) exception, the exception
2817	>	* is rethrown to its caller, and the current mapping is left
2818	>	* unchanged.  Some attempted update operations on this map by
2819	>	* other threads may be blocked while computation is in progress,
2820	>	* so the computation should be short and simple, and must not
2821	>	* attempt to update any other mappings of this Map. For example,
2822	>	* to either create or append new messages to a value mapping:
2823	>	*
2824	>	* @param key key with which the specified value is to be associated
2825	>	* @param remappingFunction the function to compute a value
2826	>	* @return the new value associated with the specified key, or null if none
2827	>	* @throws NullPointerException if the specified key or remappingFunction
2828	>	*         is null
2829	>	* @throws IllegalStateException if the computation detectably
2830	>	*         attempts a recursive update to this map that would
2831	>	*         otherwise never complete
2832	>	* @throws RuntimeException or Error if the remappingFunction does so,
2833	>	*         in which case the mapping is unchanged
2834	>	*/
2835	>	@SuppressWarnings("unchecked") public V computeIfPresent
2836	>	(K key, BiFun<? super K, ? super V, ? extends V> remappingFunction) {
2837	>	if (key == null || remappingFunction == null)
2838	>	throw new NullPointerException();
2839	>	return (V)internalCompute(key, true, remappingFunction);
2840	>	}
2841	>
2842	>	/**
2843	>	* Computes a new mapping value given a key and
2844		* its current mapped value (or {@code null} if there is no current
2845		* mapping). This is equivalent to
2846		*  <pre> {@code
2847	<	*  map.put(key, remappingFunction.remap(key, map.get(key));
2847	>	*   value = remappingFunction.apply(key, map.get(key));
2848	>	*   if (value != null)
2849	>	*     map.put(key, value);
2850	>	*   else
2851	>	*     map.remove(key);
2852		* }</pre>
2853		*
2854		* except that the action is performed atomically.  If the
2855	<	* function returns {@code null} (in which case a {@code
2856	<	* NullPointerException} is thrown), or the function itself throws
2857	<	* an (unchecked) exception, the exception is rethrown to its
2858	<	* caller, and current mapping is left unchanged.  Some attempted
2859	<	* update operations on this map by other threads may be blocked
2860	<	* while computation is in progress, so the computation should be
2861	<	* short and simple, and must not attempt to update any other
2862	<	* mappings of this Map. For example, to either create or
1674	<	* append new messages to a value mapping:
2855	>	* function returns {@code null}, the mapping is removed.  If the
2856	>	* function itself throws an (unchecked) exception, the exception
2857	>	* is rethrown to its caller, and the current mapping is left
2858	>	* unchanged.  Some attempted update operations on this map by
2859	>	* other threads may be blocked while computation is in progress,
2860	>	* so the computation should be short and simple, and must not
2861	>	* attempt to update any other mappings of this Map. For example,
2862	>	* to either create or append new messages to a value mapping:
2863		*
2864		* <pre> {@code
2865		* Map<Key, String> map = ...;
2866		* final String msg = ...;
2867	<	* map.compute(key, new RemappingFunction<Key, String>() {
2868	<	*   public String remap(Key k, String v) {
2867	>	* map.compute(key, new BiFun<Key, String, String>() {
2868	>	*   public String apply(Key k, String v) {
2869		*    return (v == null) ? msg : v + msg;});}}</pre>
2870		*
2871		* @param key key with which the specified value is to be associated
2872		* @param remappingFunction the function to compute a value
2873	<	* @return the new value associated with
1686	<	*         the specified key.
2873	>	* @return the new value associated with the specified key, or null if none
2874		* @throws NullPointerException if the specified key or remappingFunction
2875	<	*         or computed value is null
2875	>	*         is null
2876		* @throws IllegalStateException if the computation detectably
2877		*         attempts a recursive update to this map that would
2878		*         otherwise never complete
2879		* @throws RuntimeException or Error if the remappingFunction does so,
2880		*         in which case the mapping is unchanged
2881		*/
2882	<	@SuppressWarnings("unchecked")
2883	<	public V compute(K key, RemappingFunction<? super K, V> remappingFunction) {
2882	>	@SuppressWarnings("unchecked") public V compute
2883	>	(K key, BiFun<? super K, ? super V, ? extends V> remappingFunction) {
2884		if (key == null || remappingFunction == null)
2885		throw new NullPointerException();
2886	<	return (V)internalCompute(key, remappingFunction);
2886	>	return (V)internalCompute(key, false, remappingFunction);
2887	>	}
2888	>
2889	>	/**
2890	>	* If the specified key is not already associated
2891	>	* with a value, associate it with the given value.
2892	>	* Otherwise, replace the value with the results of
2893	>	* the given remapping function. This is equivalent to:
2894	>	*  <pre> {@code
2895	>	*   if (!map.containsKey(key))
2896	>	*     map.put(value);
2897	>	*   else {
2898	>	*     newValue = remappingFunction.apply(map.get(key), value);
2899	>	*     if (value != null)
2900	>	*       map.put(key, value);
2901	>	*     else
2902	>	*       map.remove(key);
2903	>	*   }
2904	>	* }</pre>
2905	>	* except that the action is performed atomically.  If the
2906	>	* function returns {@code null}, the mapping is removed.  If the
2907	>	* function itself throws an (unchecked) exception, the exception
2908	>	* is rethrown to its caller, and the current mapping is left
2909	>	* unchanged.  Some attempted update operations on this map by
2910	>	* other threads may be blocked while computation is in progress,
2911	>	* so the computation should be short and simple, and must not
2912	>	* attempt to update any other mappings of this Map.
2913	>	*/
2914	>	@SuppressWarnings("unchecked") public V merge
2915	>	(K key, V value, BiFun<? super V, ? super V, ? extends V> remappingFunction) {
2916	>	if (key == null || value == null || remappingFunction == null)
2917	>	throw new NullPointerException();
2918	>	return (V)internalMerge(key, value, remappingFunction);
2919		}
2920
2921		/**
#	Line 1708 | Line 2927 | public class ConcurrentHashMapV8<K, V>
2927		*         {@code null} if there was no mapping for {@code key}
2928		* @throws NullPointerException if the specified key is null
2929		*/
2930	<	@SuppressWarnings("unchecked")
1712	<	public V remove(Object key) {
2930	>	@SuppressWarnings("unchecked") public V remove(Object key) {
2931		if (key == null)
2932		throw new NullPointerException();
2933		return (V)internalReplace(key, null, null);
#	Line 1746 | Line 2964 | public class ConcurrentHashMapV8<K, V>
2964		*         or {@code null} if there was no mapping for the key
2965		* @throws NullPointerException if the specified key or value is null
2966		*/
2967	<	@SuppressWarnings("unchecked")
1750	<	public V replace(K key, V value) {
2967	>	@SuppressWarnings("unchecked") public V replace(K key, V value) {
2968		if (key == null || value == null)
2969		throw new NullPointerException();
2970		return (V)internalReplace(key, value, null);
#	Line 1763 | Line 2980 | public class ConcurrentHashMapV8<K, V>
2980		/**
2981		* Returns a {@link Set} view of the keys contained in this map.
2982		* The set is backed by the map, so changes to the map are
2983	<	* reflected in the set, and vice-versa.  The set supports element
1767	<	* removal, which removes the corresponding mapping from this map,
1768	<	* via the {@code Iterator.remove}, {@code Set.remove},
1769	<	* {@code removeAll}, {@code retainAll}, and {@code clear}
1770	<	* operations.  It does not support the {@code add} or
1771	<	* {@code addAll} operations.
2983	>	* reflected in the set, and vice-versa.
2984		*
2985	<	* <p>The view's {@code iterator} is a "weakly consistent" iterator
1774	<	* that will never throw {@link ConcurrentModificationException},
1775	<	* and guarantees to traverse elements as they existed upon
1776	<	* construction of the iterator, and may (but is not guaranteed to)
1777	<	* reflect any modifications subsequent to construction.
2985	>	* @return the set view
2986		*/
2987	<	public Set<K> keySet() {
2988	<	KeySet<K,V> ks = keySet;
2989	<	return (ks != null) ? ks : (keySet = new KeySet<K,V>(this));
2987	>	public KeySetView<K,V> keySet() {
2988	>	KeySetView<K,V> ks = keySet;
2989	>	return (ks != null) ? ks : (keySet = new KeySetView<K,V>(this, null));
2990	>	}
2991	>
2992	>	/**
2993	>	* Returns a {@link Set} view of the keys in this map, using the
2994	>	* given common mapped value for any additions (i.e., {@link
2995	>	* Collection#add} and {@link Collection#addAll}). This is of
2996	>	* course only appropriate if it is acceptable to use the same
2997	>	* value for all additions from this view.
2998	>	*
2999	>	* @param mappedValue the mapped value to use for any
3000	>	* additions.
3001	>	* @return the set view
3002	>	* @throws NullPointerException if the mappedValue is null
3003	>	*/
3004	>	public KeySetView<K,V> keySet(V mappedValue) {
3005	>	if (mappedValue == null)
3006	>	throw new NullPointerException();
3007	>	return new KeySetView<K,V>(this, mappedValue);
3008		}
3009
3010		/**
3011		* Returns a {@link Collection} view of the values contained in this map.
3012		* The collection is backed by the map, so changes to the map are
3013	<	* reflected in the collection, and vice-versa.  The collection
1788	<	* supports element removal, which removes the corresponding
1789	<	* mapping from this map, via the {@code Iterator.remove},
1790	<	* {@code Collection.remove}, {@code removeAll},
1791	<	* {@code retainAll}, and {@code clear} operations.  It does not
1792	<	* support the {@code add} or {@code addAll} operations.
1793	<	*
1794	<	* <p>The view's {@code iterator} is a "weakly consistent" iterator
1795	<	* that will never throw {@link ConcurrentModificationException},
1796	<	* and guarantees to traverse elements as they existed upon
1797	<	* construction of the iterator, and may (but is not guaranteed to)
1798	<	* reflect any modifications subsequent to construction.
3013	>	* reflected in the collection, and vice-versa.
3014		*/
3015	<	public Collection<V> values() {
3016	<	Values<K,V> vs = values;
3017	<	return (vs != null) ? vs : (values = new Values<K,V>(this));
3015	>	public ValuesView<K,V> values() {
3016	>	ValuesView<K,V> vs = values;
3017	>	return (vs != null) ? vs : (values = new ValuesView<K,V>(this));
3018		}
3019
3020		/**
#	Line 1819 | Line 3034 | public class ConcurrentHashMapV8<K, V>
3034		* reflect any modifications subsequent to construction.
3035		*/
3036		public Set<Map.Entry<K,V>> entrySet() {
3037	<	EntrySet<K,V> es = entrySet;
3038	<	return (es != null) ? es : (entrySet = new EntrySet<K,V>(this));
3037	>	EntrySetView<K,V> es = entrySet;
3038	>	return (es != null) ? es : (entrySet = new EntrySetView<K,V>(this));
3039		}
3040
3041		/**
#	Line 1844 | Line 3059 | public class ConcurrentHashMapV8<K, V>
3059		}
3060
3061		/**
3062	+	* Returns a partitionable iterator of the keys in this map.
3063	+	*
3064	+	* @return a partitionable iterator of the keys in this map
3065	+	*/
3066	+	public Spliterator<K> keySpliterator() {
3067	+	return new KeyIterator<K,V>(this);
3068	+	}
3069	+
3070	+	/**
3071	+	* Returns a partitionable iterator of the values in this map.
3072	+	*
3073	+	* @return a partitionable iterator of the values in this map
3074	+	*/
3075	+	public Spliterator<V> valueSpliterator() {
3076	+	return new ValueIterator<K,V>(this);
3077	+	}
3078	+
3079	+	/**
3080	+	* Returns a partitionable iterator of the entries in this map.
3081	+	*
3082	+	* @return a partitionable iterator of the entries in this map
3083	+	*/
3084	+	public Spliterator<Map.Entry<K,V>> entrySpliterator() {
3085	+	return new EntryIterator<K,V>(this);
3086	+	}
3087	+
3088	+	/**
3089		* Returns the hash code value for this {@link Map}, i.e.,
3090		* the sum of, for each key-value pair in the map,
3091		* {@code key.hashCode() ^ value.hashCode()}.
#	Line 1852 | Line 3094 | public class ConcurrentHashMapV8<K, V>
3094		*/
3095		public int hashCode() {
3096		int h = 0;
3097	<	InternalIterator it = new InternalIterator(table);
3098	<	while (it.next != null) {
3099	<	h += it.nextKey.hashCode() ^ it.nextVal.hashCode();
3100	<	it.advance();
3097	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3098	>	Object v;
3099	>	while ((v = it.advance()) != null) {
3100	>	h += it.nextKey.hashCode() ^ v.hashCode();
3101		}
3102		return h;
3103		}
#	Line 1872 | Line 3114 | public class ConcurrentHashMapV8<K, V>
3114		* @return a string representation of this map
3115		*/
3116		public String toString() {
3117	<	InternalIterator it = new InternalIterator(table);
3117	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3118		StringBuilder sb = new StringBuilder();
3119		sb.append('{');
3120	<	if (it.next != null) {
3120	>	Object v;
3121	>	if ((v = it.advance()) != null) {
3122		for (;;) {
3123	<	Object k = it.nextKey, v = it.nextVal;
3123	>	Object k = it.nextKey;
3124		sb.append(k == this ? "(this Map)" : k);
3125		sb.append('=');
3126		sb.append(v == this ? "(this Map)" : v);
3127	<	it.advance();
1885	<	if (it.next == null)
3127	>	if ((v = it.advance()) == null)
3128		break;
3129		sb.append(',').append(' ');
3130		}
#	Line 1905 | Line 3147 | public class ConcurrentHashMapV8<K, V>
3147		if (!(o instanceof Map))
3148		return false;
3149		Map<?,?> m = (Map<?,?>) o;
3150	<	InternalIterator it = new InternalIterator(table);
3151	<	while (it.next != null) {
3152	<	Object val = it.nextVal;
3150	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3151	>	Object val;
3152	>	while ((val = it.advance()) != null) {
3153		Object v = m.get(it.nextKey);
3154		if (v == null || (v != val && !v.equals(val)))
3155		return false;
1914	–	it.advance();
3156		}
3157		for (Map.Entry<?,?> e : m.entrySet()) {
3158		Object mk, mv, v;
#	Line 1927 | Line 3168 | public class ConcurrentHashMapV8<K, V>
3168
3169		/* ----------------Iterators -------------- */
3170
3171	<	/**
3172	<	* Base class for key, value, and entry iterators.  Adds a map
3173	<	* reference to InternalIterator to support Iterator.remove.
3174	<	*/
3175	<	static abstract class ViewIterator<K,V> extends InternalIterator {
1935	<	final ConcurrentHashMapV8<K, V> map;
1936	<	ViewIterator(ConcurrentHashMapV8<K, V> map) {
1937	<	super(map.table);
1938	<	this.map = map;
3171	>	@SuppressWarnings("serial") static final class KeyIterator<K,V> extends Traverser<K,V,Object>
3172	>	implements Spliterator<K>, Enumeration<K> {
3173	>	KeyIterator(ConcurrentHashMapV8<K, V> map) { super(map); }
3174	>	KeyIterator(Traverser<K,V,Object> it) {
3175	>	super(it);
3176		}
3177	<
3178	<	public final void remove() {
1942	<	if (last == null)
3177	>	public KeyIterator<K,V> split() {
3178	>	if (nextKey != null)
3179		throw new IllegalStateException();
3180	<	map.remove(last.key);
1945	<	last = null;
3180	>	return new KeyIterator<K,V>(this);
3181		}
3182	<
3183	<	public final boolean hasNext()         { return next != null; }
1949	<	public final boolean hasMoreElements() { return next != null; }
1950	<	}
1951	<
1952	<	static final class KeyIterator<K,V> extends ViewIterator<K,V>
1953	<	implements Iterator<K>, Enumeration<K> {
1954	<	KeyIterator(ConcurrentHashMapV8<K, V> map) { super(map); }
1955	<
1956	<	@SuppressWarnings("unchecked")
1957	<	public final K next() {
1958	<	if (next == null)
3182	>	@SuppressWarnings("unchecked") public final K next() {
3183	>	if (nextVal == null && advance() == null)
3184		throw new NoSuchElementException();
3185		Object k = nextKey;
3186	<	advance();
3187	<	return (K)k;
3186	>	nextVal = null;
3187	>	return (K) k;
3188		}
3189
3190		public final K nextElement() { return next(); }
3191		}
3192
3193	<	static final class ValueIterator<K,V> extends ViewIterator<K,V>
3194	<	implements Iterator<V>, Enumeration<V> {
3193	>	@SuppressWarnings("serial") static final class ValueIterator<K,V> extends Traverser<K,V,Object>
3194	>	implements Spliterator<V>, Enumeration<V> {
3195		ValueIterator(ConcurrentHashMapV8<K, V> map) { super(map); }
3196	+	ValueIterator(Traverser<K,V,Object> it) {
3197	+	super(it);
3198	+	}
3199	+	public ValueIterator<K,V> split() {
3200	+	if (nextKey != null)
3201	+	throw new IllegalStateException();
3202	+	return new ValueIterator<K,V>(this);
3203	+	}
3204
3205	<	@SuppressWarnings("unchecked")
3206	<	public final V next() {
3207	<	if (next == null)
3205	>	@SuppressWarnings("unchecked") public final V next() {
3206	>	Object v;
3207	>	if ((v = nextVal) == null && (v = advance()) == null)
3208		throw new NoSuchElementException();
3209	<	Object v = nextVal;
3210	<	advance();
1978	<	return (V)v;
3209	>	nextVal = null;
3210	>	return (V) v;
3211		}
3212
3213		public final V nextElement() { return next(); }
3214		}
3215
3216	<	static final class EntryIterator<K,V> extends ViewIterator<K,V>
3217	<	implements Iterator<Map.Entry<K,V>> {
3216	>	@SuppressWarnings("serial") static final class EntryIterator<K,V> extends Traverser<K,V,Object>
3217	>	implements Spliterator<Map.Entry<K,V>> {
3218		EntryIterator(ConcurrentHashMapV8<K, V> map) { super(map); }
3219	<
3220	<	@SuppressWarnings("unchecked")
3221	<	public final Map.Entry<K,V> next() {
3222	<	if (next == null)
3223	<	throw new NoSuchElementException();
3224	<	Object k = nextKey;
3225	<	Object v = nextVal;
1994	<	advance();
1995	<	return new WriteThroughEntry<K,V>((K)k, (V)v, map);
3219	>	EntryIterator(Traverser<K,V,Object> it) {
3220	>	super(it);
3221	>	}
3222	>	public EntryIterator<K,V> split() {
3223	>	if (nextKey != null)
3224	>	throw new IllegalStateException();
3225	>	return new EntryIterator<K,V>(this);
3226		}
1997	–	}
1998	–
1999	–	static final class SnapshotEntryIterator<K,V> extends ViewIterator<K,V>
2000	–	implements Iterator<Map.Entry<K,V>> {
2001	–	SnapshotEntryIterator(ConcurrentHashMapV8<K, V> map) { super(map); }
3227
3228	<	@SuppressWarnings("unchecked")
3229	<	public final Map.Entry<K,V> next() {
3230	<	if (next == null)
3228	>	@SuppressWarnings("unchecked") public final Map.Entry<K,V> next() {
3229	>	Object v;
3230	>	if ((v = nextVal) == null && (v = advance()) == null)
3231		throw new NoSuchElementException();
3232		Object k = nextKey;
3233	<	Object v = nextVal;
3234	<	advance();
2010	<	return new SnapshotEntry<K,V>((K)k, (V)v);
3233	>	nextVal = null;
3234	>	return new MapEntry<K,V>((K)k, (V)v, map);
3235		}
3236		}
3237
3238		/**
3239	<	* Base of writeThrough and Snapshot entry classes
3239	>	* Exported Entry for iterators
3240		*/
3241	<	static abstract class MapEntry<K,V> implements Map.Entry<K, V> {
3241	>	static final class MapEntry<K,V> implements Map.Entry<K, V> {
3242		final K key; // non-null
3243		V val;       // non-null
3244	<	MapEntry(K key, V val)        { this.key = key; this.val = val; }
3244	>	final ConcurrentHashMapV8<K, V> map;
3245	>	MapEntry(K key, V val, ConcurrentHashMapV8<K, V> map) {
3246	>	this.key = key;
3247	>	this.val = val;
3248	>	this.map = map;
3249	>	}
3250		public final K getKey()       { return key; }
3251		public final V getValue()     { return val; }
3252		public final int hashCode()   { return key.hashCode() ^ val.hashCode(); }
#	Line 2032 | Line 3261 | public class ConcurrentHashMapV8<K, V>
3261		(v == val || v.equals(val)));
3262		}
3263
2035	–	public abstract V setValue(V value);
2036	–	}
2037	–
2038	–	/**
2039	–	* Entry used by EntryIterator.next(), that relays setValue
2040	–	* changes to the underlying map.
2041	–	*/
2042	–	static final class WriteThroughEntry<K,V> extends MapEntry<K,V>
2043	–	implements Map.Entry<K, V> {
2044	–	final ConcurrentHashMapV8<K, V> map;
2045	–	WriteThroughEntry(K key, V val, ConcurrentHashMapV8<K, V> map) {
2046	–	super(key, val);
2047	–	this.map = map;
2048	–	}
2049	–
3264		/**
3265		* Sets our entry's value and writes through to the map. The
3266	<	* value to return is somewhat arbitrary here. Since a
3267	<	* WriteThroughEntry does not necessarily track asynchronous
3268	<	* changes, the most recent "previous" value could be
3269	<	* different from what we return (or could even have been
3270	<	* removed in which case the put will re-establish). We do not
2057	<	* and cannot guarantee more.
3266	>	* value to return is somewhat arbitrary here. Since we do not
3267	>	* necessarily track asynchronous changes, the most recent
3268	>	* "previous" value could be different from what we return (or
3269	>	* could even have been removed in which case the put will
3270	>	* re-establish). We do not and cannot guarantee more.
3271		*/
3272		public final V setValue(V value) {
3273		if (value == null) throw new NullPointerException();
#	Line 2065 | Line 3278 | public class ConcurrentHashMapV8<K, V>
3278		}
3279		}
3280
3281	+	/* ---------------- Serialization Support -------------- */
3282	+
3283		/**
3284	<	* Internal version of entry, that doesn't write though changes
3284	>	* Stripped-down version of helper class used in previous version,
3285	>	* declared for the sake of serialization compatibility
3286		*/
3287	<	static final class SnapshotEntry<K,V> extends MapEntry<K,V>
3288	<	implements Map.Entry<K, V> {
3289	<	SnapshotEntry(K key, V val) { super(key, val); }
3290	<	public final V setValue(V value) { // only locally update
3291	<	if (value == null) throw new NullPointerException();
3292	<	V v = val;
3293	<	val = value;
3294	<	return v;
3287	>	static class Segment<K,V> implements Serializable {
3288	>	private static final long serialVersionUID = 2249069246763182397L;
3289	>	final float loadFactor;
3290	>	Segment(float lf) { this.loadFactor = lf; }
3291	>	}
3292	>
3293	>	/**
3294	>	* Saves the state of the {@code ConcurrentHashMapV8} instance to a
3295	>	* stream (i.e., serializes it).
3296	>	* @param s the stream
3297	>	* @serialData
3298	>	* the key (Object) and value (Object)
3299	>	* for each key-value mapping, followed by a null pair.
3300	>	* The key-value mappings are emitted in no particular order.
3301	>	*/
3302	>	@SuppressWarnings("unchecked") private void writeObject(java.io.ObjectOutputStream s)
3303	>	throws java.io.IOException {
3304	>	if (segments == null) { // for serialization compatibility
3305	>	segments = (Segment<K,V>[])
3306	>	new Segment<?,?>[DEFAULT_CONCURRENCY_LEVEL];
3307	>	for (int i = 0; i < segments.length; ++i)
3308	>	segments[i] = new Segment<K,V>(LOAD_FACTOR);
3309	>	}
3310	>	s.defaultWriteObject();
3311	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3312	>	Object v;
3313	>	while ((v = it.advance()) != null) {
3314	>	s.writeObject(it.nextKey);
3315	>	s.writeObject(v);
3316		}
3317	+	s.writeObject(null);
3318	+	s.writeObject(null);
3319	+	segments = null; // throw away
3320	+	}
3321	+
3322	+	/**
3323	+	* Reconstitutes the instance from a stream (that is, deserializes it).
3324	+	* @param s the stream
3325	+	*/
3326	+	@SuppressWarnings("unchecked") private void readObject(java.io.ObjectInputStream s)
3327	+	throws java.io.IOException, ClassNotFoundException {
3328	+	s.defaultReadObject();
3329	+	this.segments = null; // unneeded
3330	+	// initialize transient final field
3331	+	UNSAFE.putObjectVolatile(this, counterOffset, new LongAdder());
3332	+
3333	+	// Create all nodes, then place in table once size is known
3334	+	long size = 0L;
3335	+	Node p = null;
3336	+	for (;;) {
3337	+	K k = (K) s.readObject();
3338	+	V v = (V) s.readObject();
3339	+	if (k != null && v != null) {
3340	+	int h = spread(k.hashCode());
3341	+	p = new Node(h, k, v, p);
3342	+	++size;
3343	+	}
3344	+	else
3345	+	break;
3346	+	}
3347	+	if (p != null) {
3348	+	boolean init = false;
3349	+	int n;
3350	+	if (size >= (long)(MAXIMUM_CAPACITY >>> 1))
3351	+	n = MAXIMUM_CAPACITY;
3352	+	else {
3353	+	int sz = (int)size;
3354	+	n = tableSizeFor(sz + (sz >>> 1) + 1);
3355	+	}
3356	+	int sc = sizeCtl;
3357	+	boolean collide = false;
3358	+	if (n > sc &&
3359	+	UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) {
3360	+	try {
3361	+	if (table == null) {
3362	+	init = true;
3363	+	Node[] tab = new Node[n];
3364	+	int mask = n - 1;
3365	+	while (p != null) {
3366	+	int j = p.hash & mask;
3367	+	Node next = p.next;
3368	+	Node q = p.next = tabAt(tab, j);
3369	+	setTabAt(tab, j, p);
3370	+	if (!collide && q != null && q.hash == p.hash)
3371	+	collide = true;
3372	+	p = next;
3373	+	}
3374	+	table = tab;
3375	+	counter.add(size);
3376	+	sc = n - (n >>> 2);
3377	+	}
3378	+	} finally {
3379	+	sizeCtl = sc;
3380	+	}
3381	+	if (collide) { // rescan and convert to TreeBins
3382	+	Node[] tab = table;
3383	+	for (int i = 0; i < tab.length; ++i) {
3384	+	int c = 0;
3385	+	for (Node e = tabAt(tab, i); e != null; e = e.next) {
3386	+	if (++c > TREE_THRESHOLD &&
3387	+	(e.key instanceof Comparable)) {
3388	+	replaceWithTreeBin(tab, i, e.key);
3389	+	break;
3390	+	}
3391	+	}
3392	+	}
3393	+	}
3394	+	}
3395	+	if (!init) { // Can only happen if unsafely published.
3396	+	while (p != null) {
3397	+	internalPut(p.key, p.val);
3398	+	p = p.next;
3399	+	}
3400	+	}
3401	+	}
3402	+	}
3403	+
3404	+
3405	+	// -------------------------------------------------------
3406	+
3407	+	// Sams
3408	+	/** Interface describing a void action of one argument */
3409	+	public interface Action<A> { void apply(A a); }
3410	+	/** Interface describing a void action of two arguments */
3411	+	public interface BiAction<A,B> { void apply(A a, B b); }
3412	+	/** Interface describing a function of one argument */
3413	+	public interface Fun<A,T> { T apply(A a); }
3414	+	/** Interface describing a function of two arguments */
3415	+	public interface BiFun<A,B,T> { T apply(A a, B b); }
3416	+	/** Interface describing a function of no arguments */
3417	+	public interface Generator<T> { T apply(); }
3418	+	/** Interface describing a function mapping its argument to a double */
3419	+	public interface ObjectToDouble<A> { double apply(A a); }
3420	+	/** Interface describing a function mapping its argument to a long */
3421	+	public interface ObjectToLong<A> { long apply(A a); }
3422	+	/** Interface describing a function mapping its argument to an int */
3423	+	public interface ObjectToInt<A> {int apply(A a); }
3424	+	/** Interface describing a function mapping two arguments to a double */
3425	+	public interface ObjectByObjectToDouble<A,B> { double apply(A a, B b); }
3426	+	/** Interface describing a function mapping two arguments to a long */
3427	+	public interface ObjectByObjectToLong<A,B> { long apply(A a, B b); }
3428	+	/** Interface describing a function mapping two arguments to an int */
3429	+	public interface ObjectByObjectToInt<A,B> {int apply(A a, B b); }
3430	+	/** Interface describing a function mapping a double to a double */
3431	+	public interface DoubleToDouble { double apply(double a); }
3432	+	/** Interface describing a function mapping a long to a long */
3433	+	public interface LongToLong { long apply(long a); }
3434	+	/** Interface describing a function mapping an int to an int */
3435	+	public interface IntToInt { int apply(int a); }
3436	+	/** Interface describing a function mapping two doubles to a double */
3437	+	public interface DoubleByDoubleToDouble { double apply(double a, double b); }
3438	+	/** Interface describing a function mapping two longs to a long */
3439	+	public interface LongByLongToLong { long apply(long a, long b); }
3440	+	/** Interface describing a function mapping two ints to an int */
3441	+	public interface IntByIntToInt { int apply(int a, int b); }
3442	+
3443	+
3444	+	// -------------------------------------------------------
3445	+
3446	+	/**
3447	+	* Performs the given action for each (key, value).
3448	+	*
3449	+	* @param action the action
3450	+	*/
3451	+	public void forEach(BiAction<K,V> action) {
3452	+	ForkJoinTasks.forEach
3453	+	(this, action).invoke();
3454	+	}
3455	+
3456	+	/**
3457	+	* Performs the given action for each non-null transformation
3458	+	* of each (key, value).
3459	+	*
3460	+	* @param transformer a function returning the transformation
3461	+	* for an element, or null of there is no transformation (in
3462	+	* which case the action is not applied).
3463	+	* @param action the action
3464	+	*/
3465	+	public <U> void forEach(BiFun<? super K, ? super V, ? extends U> transformer,
3466	+	Action<U> action) {
3467	+	ForkJoinTasks.forEach
3468	+	(this, transformer, action).invoke();
3469	+	}
3470	+
3471	+	/**
3472	+	* Returns a non-null result from applying the given search
3473	+	* function on each (key, value), or null if none.  Upon
3474	+	* success, further element processing is suppressed and the
3475	+	* results of any other parallel invocations of the search
3476	+	* function are ignored.
3477	+	*
3478	+	* @param searchFunction a function returning a non-null
3479	+	* result on success, else null
3480	+	* @return a non-null result from applying the given search
3481	+	* function on each (key, value), or null if none
3482	+	*/
3483	+	public <U> U search(BiFun<? super K, ? super V, ? extends U> searchFunction) {
3484	+	return ForkJoinTasks.search
3485	+	(this, searchFunction).invoke();
3486	+	}
3487	+
3488	+	/**
3489	+	* Returns the result of accumulating the given transformation
3490	+	* of all (key, value) pairs using the given reducer to
3491	+	* combine values, or null if none.
3492	+	*
3493	+	* @param transformer a function returning the transformation
3494	+	* for an element, or null of there is no transformation (in
3495	+	* which case it is not combined).
3496	+	* @param reducer a commutative associative combining function
3497	+	* @return the result of accumulating the given transformation
3498	+	* of all (key, value) pairs
3499	+	*/
3500	+	public <U> U reduce(BiFun<? super K, ? super V, ? extends U> transformer,
3501	+	BiFun<? super U, ? super U, ? extends U> reducer) {
3502	+	return ForkJoinTasks.reduce
3503	+	(this, transformer, reducer).invoke();
3504	+	}
3505	+
3506	+	/**
3507	+	* Returns the result of accumulating the given transformation
3508	+	* of all (key, value) pairs using the given reducer to
3509	+	* combine values, and the given basis as an identity value.
3510	+	*
3511	+	* @param transformer a function returning the transformation
3512	+	* for an element
3513	+	* @param basis the identity (initial default value) for the reduction
3514	+	* @param reducer a commutative associative combining function
3515	+	* @return the result of accumulating the given transformation
3516	+	* of all (key, value) pairs
3517	+	*/
3518	+	public double reduceToDouble(ObjectByObjectToDouble<? super K, ? super V> transformer,
3519	+	double basis,
3520	+	DoubleByDoubleToDouble reducer) {
3521	+	return ForkJoinTasks.reduceToDouble
3522	+	(this, transformer, basis, reducer).invoke();
3523	+	}
3524	+
3525	+	/**
3526	+	* Returns the result of accumulating the given transformation
3527	+	* of all (key, value) pairs using the given reducer to
3528	+	* combine values, and the given basis as an identity value.
3529	+	*
3530	+	* @param transformer a function returning the transformation
3531	+	* for an element
3532	+	* @param basis the identity (initial default value) for the reduction
3533	+	* @param reducer a commutative associative combining function
3534	+	* @return the result of accumulating the given transformation
3535	+	* of all (key, value) pairs
3536	+	*/
3537	+	public long reduceToLong(ObjectByObjectToLong<? super K, ? super V> transformer,
3538	+	long basis,
3539	+	LongByLongToLong reducer) {
3540	+	return ForkJoinTasks.reduceToLong
3541	+	(this, transformer, basis, reducer).invoke();
3542	+	}
3543	+
3544	+	/**
3545	+	* Returns the result of accumulating the given transformation
3546	+	* of all (key, value) pairs using the given reducer to
3547	+	* combine values, and the given basis as an identity value.
3548	+	*
3549	+	* @param transformer a function returning the transformation
3550	+	* for an element
3551	+	* @param basis the identity (initial default value) for the reduction
3552	+	* @param reducer a commutative associative combining function
3553	+	* @return the result of accumulating the given transformation
3554	+	* of all (key, value) pairs
3555	+	*/
3556	+	public int reduceToInt(ObjectByObjectToInt<? super K, ? super V> transformer,
3557	+	int basis,
3558	+	IntByIntToInt reducer) {
3559	+	return ForkJoinTasks.reduceToInt
3560	+	(this, transformer, basis, reducer).invoke();
3561	+	}
3562	+
3563	+	/**
3564	+	* Performs the given action for each key.
3565	+	*
3566	+	* @param action the action
3567	+	*/
3568	+	public void forEachKey(Action<K> action) {
3569	+	ForkJoinTasks.forEachKey
3570	+	(this, action).invoke();
3571	+	}
3572	+
3573	+	/**
3574	+	* Performs the given action for each non-null transformation
3575	+	* of each key.
3576	+	*
3577	+	* @param transformer a function returning the transformation
3578	+	* for an element, or null of there is no transformation (in
3579	+	* which case the action is not applied).
3580	+	* @param action the action
3581	+	*/
3582	+	public <U> void forEachKey(Fun<? super K, ? extends U> transformer,
3583	+	Action<U> action) {
3584	+	ForkJoinTasks.forEachKey
3585	+	(this, transformer, action).invoke();
3586	+	}
3587	+
3588	+	/**
3589	+	* Returns a non-null result from applying the given search
3590	+	* function on each key, or null if none. Upon success,
3591	+	* further element processing is suppressed and the results of
3592	+	* any other parallel invocations of the search function are
3593	+	* ignored.
3594	+	*
3595	+	* @param searchFunction a function returning a non-null
3596	+	* result on success, else null
3597	+	* @return a non-null result from applying the given search
3598	+	* function on each key, or null if none
3599	+	*/
3600	+	public <U> U searchKeys(Fun<? super K, ? extends U> searchFunction) {
3601	+	return ForkJoinTasks.searchKeys
3602	+	(this, searchFunction).invoke();
3603	+	}
3604	+
3605	+	/**
3606	+	* Returns the result of accumulating all keys using the given
3607	+	* reducer to combine values, or null if none.
3608	+	*
3609	+	* @param reducer a commutative associative combining function
3610	+	* @return the result of accumulating all keys using the given
3611	+	* reducer to combine values, or null if none
3612	+	*/
3613	+	public K reduceKeys(BiFun<? super K, ? super K, ? extends K> reducer) {
3614	+	return ForkJoinTasks.reduceKeys
3615	+	(this, reducer).invoke();
3616	+	}
3617	+
3618	+	/**
3619	+	* Returns the result of accumulating the given transformation
3620	+	* of all keys using the given reducer to combine values, or
3621	+	* null if none.
3622	+	*
3623	+	* @param transformer a function returning the transformation
3624	+	* for an element, or null of there is no transformation (in
3625	+	* which case it is not combined).
3626	+	* @param reducer a commutative associative combining function
3627	+	* @return the result of accumulating the given transformation
3628	+	* of all keys
3629	+	*/
3630	+	public <U> U reduceKeys(Fun<? super K, ? extends U> transformer,
3631	+	BiFun<? super U, ? super U, ? extends U> reducer) {
3632	+	return ForkJoinTasks.reduceKeys
3633	+	(this, transformer, reducer).invoke();
3634	+	}
3635	+
3636	+	/**
3637	+	* Returns the result of accumulating the given transformation
3638	+	* of all keys using the given reducer to combine values, and
3639	+	* the given basis as an identity value.
3640	+	*
3641	+	* @param transformer a function returning the transformation
3642	+	* for an element
3643	+	* @param basis the identity (initial default value) for the reduction
3644	+	* @param reducer a commutative associative combining function
3645	+	* @return  the result of accumulating the given transformation
3646	+	* of all keys
3647	+	*/
3648	+	public double reduceKeysToDouble(ObjectToDouble<? super K> transformer,
3649	+	double basis,
3650	+	DoubleByDoubleToDouble reducer) {
3651	+	return ForkJoinTasks.reduceKeysToDouble
3652	+	(this, transformer, basis, reducer).invoke();
3653	+	}
3654	+
3655	+	/**
3656	+	* Returns the result of accumulating the given transformation
3657	+	* of all keys using the given reducer to combine values, and
3658	+	* the given basis as an identity value.
3659	+	*
3660	+	* @param transformer a function returning the transformation
3661	+	* for an element
3662	+	* @param basis the identity (initial default value) for the reduction
3663	+	* @param reducer a commutative associative combining function
3664	+	* @return the result of accumulating the given transformation
3665	+	* of all keys
3666	+	*/
3667	+	public long reduceKeysToLong(ObjectToLong<? super K> transformer,
3668	+	long basis,
3669	+	LongByLongToLong reducer) {
3670	+	return ForkJoinTasks.reduceKeysToLong
3671	+	(this, transformer, basis, reducer).invoke();
3672	+	}
3673	+
3674	+	/**
3675	+	* Returns the result of accumulating the given transformation
3676	+	* of all keys using the given reducer to combine values, and
3677	+	* the given basis as an identity value.
3678	+	*
3679	+	* @param transformer a function returning the transformation
3680	+	* for an element
3681	+	* @param basis the identity (initial default value) for the reduction
3682	+	* @param reducer a commutative associative combining function
3683	+	* @return the result of accumulating the given transformation
3684	+	* of all keys
3685	+	*/
3686	+	public int reduceKeysToInt(ObjectToInt<? super K> transformer,
3687	+	int basis,
3688	+	IntByIntToInt reducer) {
3689	+	return ForkJoinTasks.reduceKeysToInt
3690	+	(this, transformer, basis, reducer).invoke();
3691	+	}
3692	+
3693	+	/**
3694	+	* Performs the given action for each value.
3695	+	*
3696	+	* @param action the action
3697	+	*/
3698	+	public void forEachValue(Action<V> action) {
3699	+	ForkJoinTasks.forEachValue
3700	+	(this, action).invoke();
3701	+	}
3702	+
3703	+	/**
3704	+	* Performs the given action for each non-null transformation
3705	+	* of each value.
3706	+	*
3707	+	* @param transformer a function returning the transformation
3708	+	* for an element, or null of there is no transformation (in
3709	+	* which case the action is not applied).
3710	+	*/
3711	+	public <U> void forEachValue(Fun<? super V, ? extends U> transformer,
3712	+	Action<U> action) {
3713	+	ForkJoinTasks.forEachValue
3714	+	(this, transformer, action).invoke();
3715	+	}
3716	+
3717	+	/**
3718	+	* Returns a non-null result from applying the given search
3719	+	* function on each value, or null if none.  Upon success,
3720	+	* further element processing is suppressed and the results of
3721	+	* any other parallel invocations of the search function are
3722	+	* ignored.
3723	+	*
3724	+	* @param searchFunction a function returning a non-null
3725	+	* result on success, else null
3726	+	* @return a non-null result from applying the given search
3727	+	* function on each value, or null if none
3728	+	*
3729	+	*/
3730	+	public <U> U searchValues(Fun<? super V, ? extends U> searchFunction) {
3731	+	return ForkJoinTasks.searchValues
3732	+	(this, searchFunction).invoke();
3733	+	}
3734	+
3735	+	/**
3736	+	* Returns the result of accumulating all values using the
3737	+	* given reducer to combine values, or null if none.
3738	+	*
3739	+	* @param reducer a commutative associative combining function
3740	+	* @return  the result of accumulating all values
3741	+	*/
3742	+	public V reduceValues(BiFun<? super V, ? super V, ? extends V> reducer) {
3743	+	return ForkJoinTasks.reduceValues
3744	+	(this, reducer).invoke();
3745	+	}
3746	+
3747	+	/**
3748	+	* Returns the result of accumulating the given transformation
3749	+	* of all values using the given reducer to combine values, or
3750	+	* null if none.
3751	+	*
3752	+	* @param transformer a function returning the transformation
3753	+	* for an element, or null of there is no transformation (in
3754	+	* which case it is not combined).
3755	+	* @param reducer a commutative associative combining function
3756	+	* @return the result of accumulating the given transformation
3757	+	* of all values
3758	+	*/
3759	+	public <U> U reduceValues(Fun<? super V, ? extends U> transformer,
3760	+	BiFun<? super U, ? super U, ? extends U> reducer) {
3761	+	return ForkJoinTasks.reduceValues
3762	+	(this, transformer, reducer).invoke();
3763	+	}
3764	+
3765	+	/**
3766	+	* Returns the result of accumulating the given transformation
3767	+	* of all values using the given reducer to combine values,
3768	+	* and the given basis as an identity value.
3769	+	*
3770	+	* @param transformer a function returning the transformation
3771	+	* for an element
3772	+	* @param basis the identity (initial default value) for the reduction
3773	+	* @param reducer a commutative associative combining function
3774	+	* @return the result of accumulating the given transformation
3775	+	* of all values
3776	+	*/
3777	+	public double reduceValuesToDouble(ObjectToDouble<? super V> transformer,
3778	+	double basis,
3779	+	DoubleByDoubleToDouble reducer) {
3780	+	return ForkJoinTasks.reduceValuesToDouble
3781	+	(this, transformer, basis, reducer).invoke();
3782	+	}
3783	+
3784	+	/**
3785	+	* Returns the result of accumulating the given transformation
3786	+	* of all values using the given reducer to combine values,
3787	+	* and the given basis as an identity value.
3788	+	*
3789	+	* @param transformer a function returning the transformation
3790	+	* for an element
3791	+	* @param basis the identity (initial default value) for the reduction
3792	+	* @param reducer a commutative associative combining function
3793	+	* @return the result of accumulating the given transformation
3794	+	* of all values
3795	+	*/
3796	+	public long reduceValuesToLong(ObjectToLong<? super V> transformer,
3797	+	long basis,
3798	+	LongByLongToLong reducer) {
3799	+	return ForkJoinTasks.reduceValuesToLong
3800	+	(this, transformer, basis, reducer).invoke();
3801	+	}
3802	+
3803	+	/**
3804	+	* Returns the result of accumulating the given transformation
3805	+	* of all values using the given reducer to combine values,
3806	+	* and the given basis as an identity value.
3807	+	*
3808	+	* @param transformer a function returning the transformation
3809	+	* for an element
3810	+	* @param basis the identity (initial default value) for the reduction
3811	+	* @param reducer a commutative associative combining function
3812	+	* @return the result of accumulating the given transformation
3813	+	* of all values
3814	+	*/
3815	+	public int reduceValuesToInt(ObjectToInt<? super V> transformer,
3816	+	int basis,
3817	+	IntByIntToInt reducer) {
3818	+	return ForkJoinTasks.reduceValuesToInt
3819	+	(this, transformer, basis, reducer).invoke();
3820	+	}
3821	+
3822	+	/**
3823	+	* Performs the given action for each entry.
3824	+	*
3825	+	* @param action the action
3826	+	*/
3827	+	public void forEachEntry(Action<Map.Entry<K,V>> action) {
3828	+	ForkJoinTasks.forEachEntry
3829	+	(this, action).invoke();
3830	+	}
3831	+
3832	+	/**
3833	+	* Performs the given action for each non-null transformation
3834	+	* of each entry.
3835	+	*
3836	+	* @param transformer a function returning the transformation
3837	+	* for an element, or null of there is no transformation (in
3838	+	* which case the action is not applied).
3839	+	* @param action the action
3840	+	*/
3841	+	public <U> void forEachEntry(Fun<Map.Entry<K,V>, ? extends U> transformer,
3842	+	Action<U> action) {
3843	+	ForkJoinTasks.forEachEntry
3844	+	(this, transformer, action).invoke();
3845	+	}
3846	+
3847	+	/**
3848	+	* Returns a non-null result from applying the given search
3849	+	* function on each entry, or null if none.  Upon success,
3850	+	* further element processing is suppressed and the results of
3851	+	* any other parallel invocations of the search function are
3852	+	* ignored.
3853	+	*
3854	+	* @param searchFunction a function returning a non-null
3855	+	* result on success, else null
3856	+	* @return a non-null result from applying the given search
3857	+	* function on each entry, or null if none
3858	+	*/
3859	+	public <U> U searchEntries(Fun<Map.Entry<K,V>, ? extends U> searchFunction) {
3860	+	return ForkJoinTasks.searchEntries
3861	+	(this, searchFunction).invoke();
3862	+	}
3863	+
3864	+	/**
3865	+	* Returns the result of accumulating all entries using the
3866	+	* given reducer to combine values, or null if none.
3867	+	*
3868	+	* @param reducer a commutative associative combining function
3869	+	* @return the result of accumulating all entries
3870	+	*/
3871	+	public Map.Entry<K,V> reduceEntries(BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
3872	+	return ForkJoinTasks.reduceEntries
3873	+	(this, reducer).invoke();
3874	+	}
3875	+
3876	+	/**
3877	+	* Returns the result of accumulating the given transformation
3878	+	* of all entries using the given reducer to combine values,
3879	+	* or null if none.
3880	+	*
3881	+	* @param transformer a function returning the transformation
3882	+	* for an element, or null of there is no transformation (in
3883	+	* which case it is not combined).
3884	+	* @param reducer a commutative associative combining function
3885	+	* @return the result of accumulating the given transformation
3886	+	* of all entries
3887	+	*/
3888	+	public <U> U reduceEntries(Fun<Map.Entry<K,V>, ? extends U> transformer,
3889	+	BiFun<? super U, ? super U, ? extends U> reducer) {
3890	+	return ForkJoinTasks.reduceEntries
3891	+	(this, transformer, reducer).invoke();
3892	+	}
3893	+
3894	+	/**
3895	+	* Returns the result of accumulating the given transformation
3896	+	* of all entries using the given reducer to combine values,
3897	+	* and the given basis as an identity value.
3898	+	*
3899	+	* @param transformer a function returning the transformation
3900	+	* for an element
3901	+	* @param basis the identity (initial default value) for the reduction
3902	+	* @param reducer a commutative associative combining function
3903	+	* @return the result of accumulating the given transformation
3904	+	* of all entries
3905	+	*/
3906	+	public double reduceEntriesToDouble(ObjectToDouble<Map.Entry<K,V>> transformer,
3907	+	double basis,
3908	+	DoubleByDoubleToDouble reducer) {
3909	+	return ForkJoinTasks.reduceEntriesToDouble
3910	+	(this, transformer, basis, reducer).invoke();
3911	+	}
3912	+
3913	+	/**
3914	+	* Returns the result of accumulating the given transformation
3915	+	* of all entries using the given reducer to combine values,
3916	+	* and the given basis as an identity value.
3917	+	*
3918	+	* @param transformer a function returning the transformation
3919	+	* for an element
3920	+	* @param basis the identity (initial default value) for the reduction
3921	+	* @param reducer a commutative associative combining function
3922	+	* @return  the result of accumulating the given transformation
3923	+	* of all entries
3924	+	*/
3925	+	public long reduceEntriesToLong(ObjectToLong<Map.Entry<K,V>> transformer,
3926	+	long basis,
3927	+	LongByLongToLong reducer) {
3928	+	return ForkJoinTasks.reduceEntriesToLong
3929	+	(this, transformer, basis, reducer).invoke();
3930	+	}
3931	+
3932	+	/**
3933	+	* Returns the result of accumulating the given transformation
3934	+	* of all entries using the given reducer to combine values,
3935	+	* and the given basis as an identity value.
3936	+	*
3937	+	* @param transformer a function returning the transformation
3938	+	* for an element
3939	+	* @param basis the identity (initial default value) for the reduction
3940	+	* @param reducer a commutative associative combining function
3941	+	* @return the result of accumulating the given transformation
3942	+	* of all entries
3943	+	*/
3944	+	public int reduceEntriesToInt(ObjectToInt<Map.Entry<K,V>> transformer,
3945	+	int basis,
3946	+	IntByIntToInt reducer) {
3947	+	return ForkJoinTasks.reduceEntriesToInt
3948	+	(this, transformer, basis, reducer).invoke();
3949		}
3950
3951		/* ----------------Views -------------- */
3952
3953		/**
3954	<	* Base class for views. This is done mainly to allow adding
2086	<	* customized parallel traversals (not yet implemented.)
3954	>	* Base class for views.
3955		*/
3956	<	static abstract class MapView<K, V> {
3956	>	static abstract class CHMView<K, V> {
3957		final ConcurrentHashMapV8<K, V> map;
3958	<	MapView(ConcurrentHashMapV8<K, V> map)  { this.map = map; }
3958	>	CHMView(ConcurrentHashMapV8<K, V> map)  { this.map = map; }
3959	>
3960	>	/**
3961	>	* Returns the map backing this view.
3962	>	*
3963	>	* @return the map backing this view
3964	>	*/
3965	>	public ConcurrentHashMapV8<K,V> getMap() { return map; }
3966	>
3967		public final int size()                 { return map.size(); }
3968		public final boolean isEmpty()          { return map.isEmpty(); }
3969		public final void clear()               { map.clear(); }
3970
3971		// implementations below rely on concrete classes supplying these
3972	<	abstract Iterator<?> iter();
3972	>	abstract public Iterator<?> iterator();
3973		abstract public boolean contains(Object o);
3974		abstract public boolean remove(Object o);
3975
3976		private static final String oomeMsg = "Required array size too large";
3977
3978		public final Object[] toArray() {
3979	<	long sz = map.longSize();
3979	>	long sz = map.mappingCount();
3980		if (sz > (long)(MAX_ARRAY_SIZE))
3981		throw new OutOfMemoryError(oomeMsg);
3982		int n = (int)sz;
3983		Object[] r = new Object[n];
3984		int i = 0;
3985	<	Iterator<?> it = iter();
3985	>	Iterator<?> it = iterator();
3986		while (it.hasNext()) {
3987		if (i == n) {
3988		if (n >= MAX_ARRAY_SIZE)
#	Line 2122 | Line 3998 | public class ConcurrentHashMapV8<K, V>
3998		return (i == n) ? r : Arrays.copyOf(r, i);
3999		}
4000
4001	<	@SuppressWarnings("unchecked")
4002	<	public final <T> T[] toArray(T[] a) {
2127	<	long sz = map.longSize();
4001	>	@SuppressWarnings("unchecked") public final <T> T[] toArray(T[] a) {
4002	>	long sz = map.mappingCount();
4003		if (sz > (long)(MAX_ARRAY_SIZE))
4004		throw new OutOfMemoryError(oomeMsg);
4005		int m = (int)sz;
#	Line 2133 | Line 4008 | public class ConcurrentHashMapV8<K, V>
4008		.newInstance(a.getClass().getComponentType(), m);
4009		int n = r.length;
4010		int i = 0;
4011	<	Iterator<?> it = iter();
4011	>	Iterator<?> it = iterator();
4012		while (it.hasNext()) {
4013		if (i == n) {
4014		if (n >= MAX_ARRAY_SIZE)
#	Line 2155 | Line 4030 | public class ConcurrentHashMapV8<K, V>
4030
4031		public final int hashCode() {
4032		int h = 0;
4033	<	for (Iterator<?> it = iter(); it.hasNext();)
4033	>	for (Iterator<?> it = iterator(); it.hasNext();)
4034		h += it.next().hashCode();
4035		return h;
4036		}
#	Line 2163 | Line 4038 | public class ConcurrentHashMapV8<K, V>
4038		public final String toString() {
4039		StringBuilder sb = new StringBuilder();
4040		sb.append('[');
4041	<	Iterator<?> it = iter();
4041	>	Iterator<?> it = iterator();
4042		if (it.hasNext()) {
4043		for (;;) {
4044		Object e = it.next();
#	Line 2189 | Line 4064 | public class ConcurrentHashMapV8<K, V>
4064
4065		public final boolean removeAll(Collection<?> c) {
4066		boolean modified = false;
4067	<	for (Iterator<?> it = iter(); it.hasNext();) {
4067	>	for (Iterator<?> it = iterator(); it.hasNext();) {
4068		if (c.contains(it.next())) {
4069		it.remove();
4070		modified = true;
#	Line 2200 | Line 4075 | public class ConcurrentHashMapV8<K, V>
4075
4076		public final boolean retainAll(Collection<?> c) {
4077		boolean modified = false;
4078	<	for (Iterator<?> it = iter(); it.hasNext();) {
4078	>	for (Iterator<?> it = iterator(); it.hasNext();) {
4079		if (!c.contains(it.next())) {
4080		it.remove();
4081		modified = true;
#	Line 2211 | Line 4086 | public class ConcurrentHashMapV8<K, V>
4086
4087		}
4088
4089	<	static final class KeySet<K,V> extends MapView<K,V> implements Set<K> {
4090	<	KeySet(ConcurrentHashMapV8<K, V> map)   { super(map); }
4091	<	public final boolean contains(Object o) { return map.containsKey(o); }
4092	<	public final boolean remove(Object o)   { return map.remove(o) != null; }
4093	<
4094	<	public final Iterator<K> iterator() {
4095	<	return new KeyIterator<K,V>(map);
4096	<	}
4097	<	final Iterator<?> iter() {
4098	<	return new KeyIterator<K,V>(map);
4099	<	}
4100	<	public final boolean add(K e) {
4101	<	throw new UnsupportedOperationException();
4089	>	/**
4090	>	* A view of a ConcurrentHashMapV8 as a {@link Set} of keys, in
4091	>	* which additions may optionally be enabled by mapping to a
4092	>	* common value.  This class cannot be directly instantiated. See
4093	>	* {@link #keySet}, {@link #keySet(Object)}, {@link #newKeySet()},
4094	>	* {@link #newKeySet(int)}.
4095	>	*/
4096	>	public static class KeySetView<K,V> extends CHMView<K,V> implements Set<K>, java.io.Serializable {
4097	>	private static final long serialVersionUID = 7249069246763182397L;
4098	>	private final V value;
4099	>	KeySetView(ConcurrentHashMapV8<K, V> map, V value) {  // non-public
4100	>	super(map);
4101	>	this.value = value;
4102		}
4103	<	public final boolean addAll(Collection<? extends K> c) {
4104	<	throw new UnsupportedOperationException();
4103	>
4104	>	/**
4105	>	* Returns the default mapped value for additions,
4106	>	* or {@code null} if additions are not supported.
4107	>	*
4108	>	* @return the default mapped value for additions, or {@code null}
4109	>	* if not supported.
4110	>	*/
4111	>	public V getMappedValue() { return value; }
4112	>
4113	>	// implement Set API
4114	>
4115	>	public boolean contains(Object o) { return map.containsKey(o); }
4116	>	public boolean remove(Object o)   { return map.remove(o) != null; }
4117	>
4118	>	/**
4119	>	* Returns a "weakly consistent" iterator that will never
4120	>	* throw {@link ConcurrentModificationException}, and
4121	>	* guarantees to traverse elements as they existed upon
4122	>	* construction of the iterator, and may (but is not
4123	>	* guaranteed to) reflect any modifications subsequent to
4124	>	* construction.
4125	>	*
4126	>	* @return an iterator over the keys of this map
4127	>	*/
4128	>	public Iterator<K> iterator()     { return new KeyIterator<K,V>(map); }
4129	>	public boolean add(K e) {
4130	>	V v;
4131	>	if ((v = value) == null)
4132	>	throw new UnsupportedOperationException();
4133	>	if (e == null)
4134	>	throw new NullPointerException();
4135	>	return map.internalPutIfAbsent(e, v) == null;
4136	>	}
4137	>	public boolean addAll(Collection<? extends K> c) {
4138	>	boolean added = false;
4139	>	V v;
4140	>	if ((v = value) == null)
4141	>	throw new UnsupportedOperationException();
4142	>	for (K e : c) {
4143	>	if (e == null)
4144	>	throw new NullPointerException();
4145	>	if (map.internalPutIfAbsent(e, v) == null)
4146	>	added = true;
4147	>	}
4148	>	return added;
4149		}
4150		public boolean equals(Object o) {
4151		Set<?> c;
#	Line 2234 | Line 4153 | public class ConcurrentHashMapV8<K, V>
4153		((c = (Set<?>)o) == this ||
4154		(containsAll(c) && c.containsAll(this))));
4155		}
4156	+
4157	+	/**
4158	+	* Performs the given action for each key.
4159	+	*
4160	+	* @param action the action
4161	+	*/
4162	+	public void forEach(Action<K> action) {
4163	+	ForkJoinTasks.forEachKey
4164	+	(map, action).invoke();
4165	+	}
4166	+
4167	+	/**
4168	+	* Performs the given action for each non-null transformation
4169	+	* of each key.
4170	+	*
4171	+	* @param transformer a function returning the transformation
4172	+	* for an element, or null of there is no transformation (in
4173	+	* which case the action is not applied).
4174	+	* @param action the action
4175	+	*/
4176	+	public <U> void forEach(Fun<? super K, ? extends U> transformer,
4177	+	Action<U> action) {
4178	+	ForkJoinTasks.forEachKey
4179	+	(map, transformer, action).invoke();
4180	+	}
4181	+
4182	+	/**
4183	+	* Returns a non-null result from applying the given search
4184	+	* function on each key, or null if none. Upon success,
4185	+	* further element processing is suppressed and the results of
4186	+	* any other parallel invocations of the search function are
4187	+	* ignored.
4188	+	*
4189	+	* @param searchFunction a function returning a non-null
4190	+	* result on success, else null
4191	+	* @return a non-null result from applying the given search
4192	+	* function on each key, or null if none
4193	+	*/
4194	+	public <U> U search(Fun<? super K, ? extends U> searchFunction) {
4195	+	return ForkJoinTasks.searchKeys
4196	+	(map, searchFunction).invoke();
4197	+	}
4198	+
4199	+	/**
4200	+	* Returns the result of accumulating all keys using the given
4201	+	* reducer to combine values, or null if none.
4202	+	*
4203	+	* @param reducer a commutative associative combining function
4204	+	* @return the result of accumulating all keys using the given
4205	+	* reducer to combine values, or null if none
4206	+	*/
4207	+	public K reduce(BiFun<? super K, ? super K, ? extends K> reducer) {
4208	+	return ForkJoinTasks.reduceKeys
4209	+	(map, reducer).invoke();
4210	+	}
4211	+
4212	+	/**
4213	+	* Returns the result of accumulating the given transformation
4214	+	* of all keys using the given reducer to combine values, and
4215	+	* the given basis as an identity value.
4216	+	*
4217	+	* @param transformer a function returning the transformation
4218	+	* for an element
4219	+	* @param basis the identity (initial default value) for the reduction
4220	+	* @param reducer a commutative associative combining function
4221	+	* @return  the result of accumulating the given transformation
4222	+	* of all keys
4223	+	*/
4224	+	public double reduceToDouble(ObjectToDouble<? super K> transformer,
4225	+	double basis,
4226	+	DoubleByDoubleToDouble reducer) {
4227	+	return ForkJoinTasks.reduceKeysToDouble
4228	+	(map, transformer, basis, reducer).invoke();
4229	+	}
4230	+
4231	+
4232	+	/**
4233	+	* Returns the result of accumulating the given transformation
4234	+	* of all keys using the given reducer to combine values, and
4235	+	* the given basis as an identity value.
4236	+	*
4237	+	* @param transformer a function returning the transformation
4238	+	* for an element
4239	+	* @param basis the identity (initial default value) for the reduction
4240	+	* @param reducer a commutative associative combining function
4241	+	* @return the result of accumulating the given transformation
4242	+	* of all keys
4243	+	*/
4244	+	public long reduceToLong(ObjectToLong<? super K> transformer,
4245	+	long basis,
4246	+	LongByLongToLong reducer) {
4247	+	return ForkJoinTasks.reduceKeysToLong
4248	+	(map, transformer, basis, reducer).invoke();
4249	+	}
4250	+
4251	+	/**
4252	+	* Returns the result of accumulating the given transformation
4253	+	* of all keys using the given reducer to combine values, and
4254	+	* the given basis as an identity value.
4255	+	*
4256	+	* @param transformer a function returning the transformation
4257	+	* for an element
4258	+	* @param basis the identity (initial default value) for the reduction
4259	+	* @param reducer a commutative associative combining function
4260	+	* @return the result of accumulating the given transformation
4261	+	* of all keys
4262	+	*/
4263	+	public int reduceToInt(ObjectToInt<? super K> transformer,
4264	+	int basis,
4265	+	IntByIntToInt reducer) {
4266	+	return ForkJoinTasks.reduceKeysToInt
4267	+	(map, transformer, basis, reducer).invoke();
4268	+	}
4269	+
4270		}
4271
4272	<	static final class Values<K,V> extends MapView<K,V>
4272	>	/**
4273	>	* A view of a ConcurrentHashMapV8 as a {@link Collection} of
4274	>	* values, in which additions are disabled. This class cannot be
4275	>	* directly instantiated. See {@link #values},
4276	>	*
4277	>	* <p>The view's {@code iterator} is a "weakly consistent" iterator
4278	>	* that will never throw {@link ConcurrentModificationException},
4279	>	* and guarantees to traverse elements as they existed upon
4280	>	* construction of the iterator, and may (but is not guaranteed to)
4281	>	* reflect any modifications subsequent to construction.
4282	>	*/
4283	>	public static final class ValuesView<K,V> extends CHMView<K,V>
4284		implements Collection<V> {
4285	<	Values(ConcurrentHashMapV8<K, V> map)   { super(map); }
4285	>	ValuesView(ConcurrentHashMapV8<K, V> map)   { super(map); }
4286		public final boolean contains(Object o) { return map.containsValue(o); }
2243	–
4287		public final boolean remove(Object o) {
4288		if (o != null) {
4289		Iterator<V> it = new ValueIterator<K,V>(map);
#	Line 2253 | Line 4296 | public class ConcurrentHashMapV8<K, V>
4296		}
4297		return false;
4298		}
4299	+
4300	+	/**
4301	+	* Returns a "weakly consistent" iterator that will never
4302	+	* throw {@link ConcurrentModificationException}, and
4303	+	* guarantees to traverse elements as they existed upon
4304	+	* construction of the iterator, and may (but is not
4305	+	* guaranteed to) reflect any modifications subsequent to
4306	+	* construction.
4307	+	*
4308	+	* @return an iterator over the values of this map
4309	+	*/
4310		public final Iterator<V> iterator() {
4311		return new ValueIterator<K,V>(map);
4312		}
2259	–	final Iterator<?> iter() {
2260	–	return new ValueIterator<K,V>(map);
2261	–	}
4313		public final boolean add(V e) {
4314		throw new UnsupportedOperationException();
4315		}
4316		public final boolean addAll(Collection<? extends V> c) {
4317		throw new UnsupportedOperationException();
4318		}
4319	+
4320	+	/**
4321	+	* Performs the given action for each value.
4322	+	*
4323	+	* @param action the action
4324	+	*/
4325	+	public void forEach(Action<V> action) {
4326	+	ForkJoinTasks.forEachValue
4327	+	(map, action).invoke();
4328	+	}
4329	+
4330	+	/**
4331	+	* Performs the given action for each non-null transformation
4332	+	* of each value.
4333	+	*
4334	+	* @param transformer a function returning the transformation
4335	+	* for an element, or null of there is no transformation (in
4336	+	* which case the action is not applied).
4337	+	*/
4338	+	public <U> void forEach(Fun<? super V, ? extends U> transformer,
4339	+	Action<U> action) {
4340	+	ForkJoinTasks.forEachValue
4341	+	(map, transformer, action).invoke();
4342	+	}
4343	+
4344	+	/**
4345	+	* Returns a non-null result from applying the given search
4346	+	* function on each value, or null if none.  Upon success,
4347	+	* further element processing is suppressed and the results of
4348	+	* any other parallel invocations of the search function are
4349	+	* ignored.
4350	+	*
4351	+	* @param searchFunction a function returning a non-null
4352	+	* result on success, else null
4353	+	* @return a non-null result from applying the given search
4354	+	* function on each value, or null if none
4355	+	*
4356	+	*/
4357	+	public <U> U search(Fun<? super V, ? extends U> searchFunction) {
4358	+	return ForkJoinTasks.searchValues
4359	+	(map, searchFunction).invoke();
4360	+	}
4361	+
4362	+	/**
4363	+	* Returns the result of accumulating all values using the
4364	+	* given reducer to combine values, or null if none.
4365	+	*
4366	+	* @param reducer a commutative associative combining function
4367	+	* @return  the result of accumulating all values
4368	+	*/
4369	+	public V reduce(BiFun<? super V, ? super V, ? extends V> reducer) {
4370	+	return ForkJoinTasks.reduceValues
4371	+	(map, reducer).invoke();
4372	+	}
4373	+
4374	+	/**
4375	+	* Returns the result of accumulating the given transformation
4376	+	* of all values using the given reducer to combine values, or
4377	+	* null if none.
4378	+	*
4379	+	* @param transformer a function returning the transformation
4380	+	* for an element, or null of there is no transformation (in
4381	+	* which case it is not combined).
4382	+	* @param reducer a commutative associative combining function
4383	+	* @return the result of accumulating the given transformation
4384	+	* of all values
4385	+	*/
4386	+	public <U> U reduce(Fun<? super V, ? extends U> transformer,
4387	+	BiFun<? super U, ? super U, ? extends U> reducer) {
4388	+	return ForkJoinTasks.reduceValues
4389	+	(map, transformer, reducer).invoke();
4390	+	}
4391	+
4392	+	/**
4393	+	* Returns the result of accumulating the given transformation
4394	+	* of all values using the given reducer to combine values,
4395	+	* and the given basis as an identity value.
4396	+	*
4397	+	* @param transformer a function returning the transformation
4398	+	* for an element
4399	+	* @param basis the identity (initial default value) for the reduction
4400	+	* @param reducer a commutative associative combining function
4401	+	* @return the result of accumulating the given transformation
4402	+	* of all values
4403	+	*/
4404	+	public double reduceToDouble(ObjectToDouble<? super V> transformer,
4405	+	double basis,
4406	+	DoubleByDoubleToDouble reducer) {
4407	+	return ForkJoinTasks.reduceValuesToDouble
4408	+	(map, transformer, basis, reducer).invoke();
4409	+	}
4410	+
4411	+	/**
4412	+	* Returns the result of accumulating the given transformation
4413	+	* of all values using the given reducer to combine values,
4414	+	* and the given basis as an identity value.
4415	+	*
4416	+	* @param transformer a function returning the transformation
4417	+	* for an element
4418	+	* @param basis the identity (initial default value) for the reduction
4419	+	* @param reducer a commutative associative combining function
4420	+	* @return the result of accumulating the given transformation
4421	+	* of all values
4422	+	*/
4423	+	public long reduceToLong(ObjectToLong<? super V> transformer,
4424	+	long basis,
4425	+	LongByLongToLong reducer) {
4426	+	return ForkJoinTasks.reduceValuesToLong
4427	+	(map, transformer, basis, reducer).invoke();
4428	+	}
4429	+
4430	+	/**
4431	+	* Returns the result of accumulating the given transformation
4432	+	* of all values using the given reducer to combine values,
4433	+	* and the given basis as an identity value.
4434	+	*
4435	+	* @param transformer a function returning the transformation
4436	+	* for an element
4437	+	* @param basis the identity (initial default value) for the reduction
4438	+	* @param reducer a commutative associative combining function
4439	+	* @return the result of accumulating the given transformation
4440	+	* of all values
4441	+	*/
4442	+	public int reduceToInt(ObjectToInt<? super V> transformer,
4443	+	int basis,
4444	+	IntByIntToInt reducer) {
4445	+	return ForkJoinTasks.reduceValuesToInt
4446	+	(map, transformer, basis, reducer).invoke();
4447	+	}
4448	+
4449		}
4450
4451	<	static final class EntrySet<K,V> extends MapView<K,V>
4451	>	/**
4452	>	* A view of a ConcurrentHashMapV8 as a {@link Set} of (key, value)
4453	>	* entries.  This class cannot be directly instantiated. See
4454	>	* {@link #entrySet}.
4455	>	*/
4456	>	public static final class EntrySetView<K,V> extends CHMView<K,V>
4457		implements Set<Map.Entry<K,V>> {
4458	<	EntrySet(ConcurrentHashMapV8<K, V> map) { super(map); }
2273	<
4458	>	EntrySetView(ConcurrentHashMapV8<K, V> map) { super(map); }
4459		public final boolean contains(Object o) {
4460		Object k, v, r; Map.Entry<?,?> e;
4461		return ((o instanceof Map.Entry) &&
#	Line 2279 | Line 4464 | public class ConcurrentHashMapV8<K, V>
4464		(v = e.getValue()) != null &&
4465		(v == r || v.equals(r)));
4466		}
2282	–
4467		public final boolean remove(Object o) {
4468		Object k, v; Map.Entry<?,?> e;
4469		return ((o instanceof Map.Entry) &&
#	Line 2288 | Line 4472 | public class ConcurrentHashMapV8<K, V>
4472		map.remove(k, v));
4473		}
4474
4475	+	/**
4476	+	* Returns a "weakly consistent" iterator that will never
4477	+	* throw {@link ConcurrentModificationException}, and
4478	+	* guarantees to traverse elements as they existed upon
4479	+	* construction of the iterator, and may (but is not
4480	+	* guaranteed to) reflect any modifications subsequent to
4481	+	* construction.
4482	+	*
4483	+	* @return an iterator over the entries of this map
4484	+	*/
4485		public final Iterator<Map.Entry<K,V>> iterator() {
4486		return new EntryIterator<K,V>(map);
4487		}
4488	<	final Iterator<?> iter() {
2295	<	return new SnapshotEntryIterator<K,V>(map);
2296	<	}
4488	>
4489		public final boolean add(Entry<K,V> e) {
4490	<	throw new UnsupportedOperationException();
4490	>	K key = e.getKey();
4491	>	V value = e.getValue();
4492	>	if (key == null || value == null)
4493	>	throw new NullPointerException();
4494	>	return map.internalPut(key, value) == null;
4495		}
4496		public final boolean addAll(Collection<? extends Entry<K,V>> c) {
4497	<	throw new UnsupportedOperationException();
4497	>	boolean added = false;
4498	>	for (Entry<K,V> e : c) {
4499	>	if (add(e))
4500	>	added = true;
4501	>	}
4502	>	return added;
4503		}
4504		public boolean equals(Object o) {
4505		Set<?> c;
#	Line 2306 | Line 4507 | public class ConcurrentHashMapV8<K, V>
4507		((c = (Set<?>)o) == this ||
4508		(containsAll(c) && c.containsAll(this))));
4509		}
4510	+
4511	+	/**
4512	+	* Performs the given action for each entry.
4513	+	*
4514	+	* @param action the action
4515	+	*/
4516	+	public void forEach(Action<Map.Entry<K,V>> action) {
4517	+	ForkJoinTasks.forEachEntry
4518	+	(map, action).invoke();
4519	+	}
4520	+
4521	+	/**
4522	+	* Performs the given action for each non-null transformation
4523	+	* of each entry.
4524	+	*
4525	+	* @param transformer a function returning the transformation
4526	+	* for an element, or null of there is no transformation (in
4527	+	* which case the action is not applied).
4528	+	* @param action the action
4529	+	*/
4530	+	public <U> void forEach(Fun<Map.Entry<K,V>, ? extends U> transformer,
4531	+	Action<U> action) {
4532	+	ForkJoinTasks.forEachEntry
4533	+	(map, transformer, action).invoke();
4534	+	}
4535	+
4536	+	/**
4537	+	* Returns a non-null result from applying the given search
4538	+	* function on each entry, or null if none.  Upon success,
4539	+	* further element processing is suppressed and the results of
4540	+	* any other parallel invocations of the search function are
4541	+	* ignored.
4542	+	*
4543	+	* @param searchFunction a function returning a non-null
4544	+	* result on success, else null
4545	+	* @return a non-null result from applying the given search
4546	+	* function on each entry, or null if none
4547	+	*/
4548	+	public <U> U search(Fun<Map.Entry<K,V>, ? extends U> searchFunction) {
4549	+	return ForkJoinTasks.searchEntries
4550	+	(map, searchFunction).invoke();
4551	+	}
4552	+
4553	+	/**
4554	+	* Returns the result of accumulating all entries using the
4555	+	* given reducer to combine values, or null if none.
4556	+	*
4557	+	* @param reducer a commutative associative combining function
4558	+	* @return the result of accumulating all entries
4559	+	*/
4560	+	public Map.Entry<K,V> reduce(BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
4561	+	return ForkJoinTasks.reduceEntries
4562	+	(map, reducer).invoke();
4563	+	}
4564	+
4565	+	/**
4566	+	* Returns the result of accumulating the given transformation
4567	+	* of all entries using the given reducer to combine values,
4568	+	* or null if none.
4569	+	*
4570	+	* @param transformer a function returning the transformation
4571	+	* for an element, or null of there is no transformation (in
4572	+	* which case it is not combined).
4573	+	* @param reducer a commutative associative combining function
4574	+	* @return the result of accumulating the given transformation
4575	+	* of all entries
4576	+	*/
4577	+	public <U> U reduce(Fun<Map.Entry<K,V>, ? extends U> transformer,
4578	+	BiFun<? super U, ? super U, ? extends U> reducer) {
4579	+	return ForkJoinTasks.reduceEntries
4580	+	(map, transformer, reducer).invoke();
4581	+	}
4582	+
4583	+	/**
4584	+	* Returns the result of accumulating the given transformation
4585	+	* of all entries using the given reducer to combine values,
4586	+	* and the given basis as an identity value.
4587	+	*
4588	+	* @param transformer a function returning the transformation
4589	+	* for an element
4590	+	* @param basis the identity (initial default value) for the reduction
4591	+	* @param reducer a commutative associative combining function
4592	+	* @return the result of accumulating the given transformation
4593	+	* of all entries
4594	+	*/
4595	+	public double reduceToDouble(ObjectToDouble<Map.Entry<K,V>> transformer,
4596	+	double basis,
4597	+	DoubleByDoubleToDouble reducer) {
4598	+	return ForkJoinTasks.reduceEntriesToDouble
4599	+	(map, transformer, basis, reducer).invoke();
4600	+	}
4601	+
4602	+	/**
4603	+	* Returns the result of accumulating the given transformation
4604	+	* of all entries using the given reducer to combine values,
4605	+	* and the given basis as an identity value.
4606	+	*
4607	+	* @param transformer a function returning the transformation
4608	+	* for an element
4609	+	* @param basis the identity (initial default value) for the reduction
4610	+	* @param reducer a commutative associative combining function
4611	+	* @return  the result of accumulating the given transformation
4612	+	* of all entries
4613	+	*/
4614	+	public long reduceToLong(ObjectToLong<Map.Entry<K,V>> transformer,
4615	+	long basis,
4616	+	LongByLongToLong reducer) {
4617	+	return ForkJoinTasks.reduceEntriesToLong
4618	+	(map, transformer, basis, reducer).invoke();
4619	+	}
4620	+
4621	+	/**
4622	+	* Returns the result of accumulating the given transformation
4623	+	* of all entries using the given reducer to combine values,
4624	+	* and the given basis as an identity value.
4625	+	*
4626	+	* @param transformer a function returning the transformation
4627	+	* for an element
4628	+	* @param basis the identity (initial default value) for the reduction
4629	+	* @param reducer a commutative associative combining function
4630	+	* @return the result of accumulating the given transformation
4631	+	* of all entries
4632	+	*/
4633	+	public int reduceToInt(ObjectToInt<Map.Entry<K,V>> transformer,
4634	+	int basis,
4635	+	IntByIntToInt reducer) {
4636	+	return ForkJoinTasks.reduceEntriesToInt
4637	+	(map, transformer, basis, reducer).invoke();
4638	+	}
4639	+
4640		}
4641
4642	<	/* ---------------- Serialization Support -------------- */
4642	>	// ---------------------------------------------------------------------
4643
4644		/**
4645	<	* Stripped-down version of helper class used in previous version,
4646	<	* declared for the sake of serialization compatibility
4645	>	* Predefined tasks for performing bulk parallel operations on
4646	>	* ConcurrentHashMapV8s. These tasks follow the forms and rules used
4647	>	* for bulk operations. Each method has the same name, but returns
4648	>	* a task rather than invoking it. These methods may be useful in
4649	>	* custom applications such as submitting a task without waiting
4650	>	* for completion, using a custom pool, or combining with other
4651	>	* tasks.
4652		*/
4653	<	static class Segment<K,V> implements Serializable {
4654	<	private static final long serialVersionUID = 2249069246763182397L;
4655	<	final float loadFactor;
4656	<	Segment(float lf) { this.loadFactor = lf; }
4653	>	public static class ForkJoinTasks {
4654	>	private ForkJoinTasks() {}
4655	>
4656	>	/**
4657	>	* Returns a task that when invoked, performs the given
4658	>	* action for each (key, value)
4659	>	*
4660	>	* @param map the map
4661	>	* @param action the action
4662	>	* @return the task
4663	>	*/
4664	>	public static <K,V> ForkJoinTask<Void> forEach
4665	>	(ConcurrentHashMapV8<K,V> map,
4666	>	BiAction<K,V> action) {
4667	>	if (action == null) throw new NullPointerException();
4668	>	return new ForEachMappingTask<K,V>(map, null, -1, null, action);
4669	>	}
4670	>
4671	>	/**
4672	>	* Returns a task that when invoked, performs the given
4673	>	* action for each non-null transformation of each (key, value)
4674	>	*
4675	>	* @param map the map
4676	>	* @param transformer a function returning the transformation
4677	>	* for an element, or null if there is no transformation (in
4678	>	* which case the action is not applied)
4679	>	* @param action the action
4680	>	* @return the task
4681	>	*/
4682	>	public static <K,V,U> ForkJoinTask<Void> forEach
4683	>	(ConcurrentHashMapV8<K,V> map,
4684	>	BiFun<? super K, ? super V, ? extends U> transformer,
4685	>	Action<U> action) {
4686	>	if (transformer == null || action == null)
4687	>	throw new NullPointerException();
4688	>	return new ForEachTransformedMappingTask<K,V,U>
4689	>	(map, null, -1, null, transformer, action);
4690	>	}
4691	>
4692	>	/**
4693	>	* Returns a task that when invoked, returns a non-null result
4694	>	* from applying the given search function on each (key,
4695	>	* value), or null if none. Upon success, further element
4696	>	* processing is suppressed and the results of any other
4697	>	* parallel invocations of the search function are ignored.
4698	>	*
4699	>	* @param map the map
4700	>	* @param searchFunction a function returning a non-null
4701	>	* result on success, else null
4702	>	* @return the task
4703	>	*/
4704	>	public static <K,V,U> ForkJoinTask<U> search
4705	>	(ConcurrentHashMapV8<K,V> map,
4706	>	BiFun<? super K, ? super V, ? extends U> searchFunction) {
4707	>	if (searchFunction == null) throw new NullPointerException();
4708	>	return new SearchMappingsTask<K,V,U>
4709	>	(map, null, -1, null, searchFunction,
4710	>	new AtomicReference<U>());
4711	>	}
4712	>
4713	>	/**
4714	>	* Returns a task that when invoked, returns the result of
4715	>	* accumulating the given transformation of all (key, value) pairs
4716	>	* using the given reducer to combine values, or null if none.
4717	>	*
4718	>	* @param map the map
4719	>	* @param transformer a function returning the transformation
4720	>	* for an element, or null if there is no transformation (in
4721	>	* which case it is not combined).
4722	>	* @param reducer a commutative associative combining function
4723	>	* @return the task
4724	>	*/
4725	>	public static <K,V,U> ForkJoinTask<U> reduce
4726	>	(ConcurrentHashMapV8<K,V> map,
4727	>	BiFun<? super K, ? super V, ? extends U> transformer,
4728	>	BiFun<? super U, ? super U, ? extends U> reducer) {
4729	>	if (transformer == null || reducer == null)
4730	>	throw new NullPointerException();
4731	>	return new MapReduceMappingsTask<K,V,U>
4732	>	(map, null, -1, null, transformer, reducer);
4733	>	}
4734	>
4735	>	/**
4736	>	* Returns a task that when invoked, returns the result of
4737	>	* accumulating the given transformation of all (key, value) pairs
4738	>	* using the given reducer to combine values, and the given
4739	>	* basis as an identity value.
4740	>	*
4741	>	* @param map the map
4742	>	* @param transformer a function returning the transformation
4743	>	* for an element
4744	>	* @param basis the identity (initial default value) for the reduction
4745	>	* @param reducer a commutative associative combining function
4746	>	* @return the task
4747	>	*/
4748	>	public static <K,V> ForkJoinTask<Double> reduceToDouble
4749	>	(ConcurrentHashMapV8<K,V> map,
4750	>	ObjectByObjectToDouble<? super K, ? super V> transformer,
4751	>	double basis,
4752	>	DoubleByDoubleToDouble reducer) {
4753	>	if (transformer == null || reducer == null)
4754	>	throw new NullPointerException();
4755	>	return new MapReduceMappingsToDoubleTask<K,V>
4756	>	(map, null, -1, null, transformer, basis, reducer);
4757	>	}
4758	>
4759	>	/**
4760	>	* Returns a task that when invoked, returns the result of
4761	>	* accumulating the given transformation of all (key, value) pairs
4762	>	* using the given reducer to combine values, and the given
4763	>	* basis as an identity value.
4764	>	*
4765	>	* @param map the map
4766	>	* @param transformer a function returning the transformation
4767	>	* for an element
4768	>	* @param basis the identity (initial default value) for the reduction
4769	>	* @param reducer a commutative associative combining function
4770	>	* @return the task
4771	>	*/
4772	>	public static <K,V> ForkJoinTask<Long> reduceToLong
4773	>	(ConcurrentHashMapV8<K,V> map,
4774	>	ObjectByObjectToLong<? super K, ? super V> transformer,
4775	>	long basis,
4776	>	LongByLongToLong reducer) {
4777	>	if (transformer == null || reducer == null)
4778	>	throw new NullPointerException();
4779	>	return new MapReduceMappingsToLongTask<K,V>
4780	>	(map, null, -1, null, transformer, basis, reducer);
4781	>	}
4782	>
4783	>	/**
4784	>	* Returns a task that when invoked, returns the result of
4785	>	* accumulating the given transformation of all (key, value) pairs
4786	>	* using the given reducer to combine values, and the given
4787	>	* basis as an identity value.
4788	>	*
4789	>	* @param transformer a function returning the transformation
4790	>	* for an element
4791	>	* @param basis the identity (initial default value) for the reduction
4792	>	* @param reducer a commutative associative combining function
4793	>	* @return the task
4794	>	*/
4795	>	public static <K,V> ForkJoinTask<Integer> reduceToInt
4796	>	(ConcurrentHashMapV8<K,V> map,
4797	>	ObjectByObjectToInt<? super K, ? super V> transformer,
4798	>	int basis,
4799	>	IntByIntToInt reducer) {
4800	>	if (transformer == null || reducer == null)
4801	>	throw new NullPointerException();
4802	>	return new MapReduceMappingsToIntTask<K,V>
4803	>	(map, null, -1, null, transformer, basis, reducer);
4804	>	}
4805	>
4806	>	/**
4807	>	* Returns a task that when invoked, performs the given action
4808	>	* for each key.
4809	>	*
4810	>	* @param map the map
4811	>	* @param action the action
4812	>	* @return the task
4813	>	*/
4814	>	public static <K,V> ForkJoinTask<Void> forEachKey
4815	>	(ConcurrentHashMapV8<K,V> map,
4816	>	Action<K> action) {
4817	>	if (action == null) throw new NullPointerException();
4818	>	return new ForEachKeyTask<K,V>(map, null, -1, null, action);
4819	>	}
4820	>
4821	>	/**
4822	>	* Returns a task that when invoked, performs the given action
4823	>	* for each non-null transformation of each key.
4824	>	*
4825	>	* @param map the map
4826	>	* @param transformer a function returning the transformation
4827	>	* for an element, or null if there is no transformation (in
4828	>	* which case the action is not applied)
4829	>	* @param action the action
4830	>	* @return the task
4831	>	*/
4832	>	public static <K,V,U> ForkJoinTask<Void> forEachKey
4833	>	(ConcurrentHashMapV8<K,V> map,
4834	>	Fun<? super K, ? extends U> transformer,
4835	>	Action<U> action) {
4836	>	if (transformer == null || action == null)
4837	>	throw new NullPointerException();
4838	>	return new ForEachTransformedKeyTask<K,V,U>
4839	>	(map, null, -1, null, transformer, action);
4840	>	}
4841	>
4842	>	/**
4843	>	* Returns a task that when invoked, returns a non-null result
4844	>	* from applying the given search function on each key, or
4845	>	* null if none.  Upon success, further element processing is
4846	>	* suppressed and the results of any other parallel
4847	>	* invocations of the search function are ignored.
4848	>	*
4849	>	* @param map the map
4850	>	* @param searchFunction a function returning a non-null
4851	>	* result on success, else null
4852	>	* @return the task
4853	>	*/
4854	>	public static <K,V,U> ForkJoinTask<U> searchKeys
4855	>	(ConcurrentHashMapV8<K,V> map,
4856	>	Fun<? super K, ? extends U> searchFunction) {
4857	>	if (searchFunction == null) throw new NullPointerException();
4858	>	return new SearchKeysTask<K,V,U>
4859	>	(map, null, -1, null, searchFunction,
4860	>	new AtomicReference<U>());
4861	>	}
4862	>
4863	>	/**
4864	>	* Returns a task that when invoked, returns the result of
4865	>	* accumulating all keys using the given reducer to combine
4866	>	* values, or null if none.
4867	>	*
4868	>	* @param map the map
4869	>	* @param reducer a commutative associative combining function
4870	>	* @return the task
4871	>	*/
4872	>	public static <K,V> ForkJoinTask<K> reduceKeys
4873	>	(ConcurrentHashMapV8<K,V> map,
4874	>	BiFun<? super K, ? super K, ? extends K> reducer) {
4875	>	if (reducer == null) throw new NullPointerException();
4876	>	return new ReduceKeysTask<K,V>
4877	>	(map, null, -1, null, reducer);
4878	>	}
4879	>
4880	>	/**
4881	>	* Returns a task that when invoked, returns the result of
4882	>	* accumulating the given transformation of all keys using the given
4883	>	* reducer to combine values, or null if none.
4884	>	*
4885	>	* @param map the map
4886	>	* @param transformer a function returning the transformation
4887	>	* for an element, or null if there is no transformation (in
4888	>	* which case it is not combined).
4889	>	* @param reducer a commutative associative combining function
4890	>	* @return the task
4891	>	*/
4892	>	public static <K,V,U> ForkJoinTask<U> reduceKeys
4893	>	(ConcurrentHashMapV8<K,V> map,
4894	>	Fun<? super K, ? extends U> transformer,
4895	>	BiFun<? super U, ? super U, ? extends U> reducer) {
4896	>	if (transformer == null || reducer == null)
4897	>	throw new NullPointerException();
4898	>	return new MapReduceKeysTask<K,V,U>
4899	>	(map, null, -1, null, transformer, reducer);
4900	>	}
4901	>
4902	>	/**
4903	>	* Returns a task that when invoked, returns the result of
4904	>	* accumulating the given transformation of all keys using the given
4905	>	* reducer to combine values, and the given basis as an
4906	>	* identity value.
4907	>	*
4908	>	* @param map the map
4909	>	* @param transformer a function returning the transformation
4910	>	* for an element
4911	>	* @param basis the identity (initial default value) for the reduction
4912	>	* @param reducer a commutative associative combining function
4913	>	* @return the task
4914	>	*/
4915	>	public static <K,V> ForkJoinTask<Double> reduceKeysToDouble
4916	>	(ConcurrentHashMapV8<K,V> map,
4917	>	ObjectToDouble<? super K> transformer,
4918	>	double basis,
4919	>	DoubleByDoubleToDouble reducer) {
4920	>	if (transformer == null || reducer == null)
4921	>	throw new NullPointerException();
4922	>	return new MapReduceKeysToDoubleTask<K,V>
4923	>	(map, null, -1, null, transformer, basis, reducer);
4924	>	}
4925	>
4926	>	/**
4927	>	* Returns a task that when invoked, returns the result of
4928	>	* accumulating the given transformation of all keys using the given
4929	>	* reducer to combine values, and the given basis as an
4930	>	* identity value.
4931	>	*
4932	>	* @param map the map
4933	>	* @param transformer a function returning the transformation
4934	>	* for an element
4935	>	* @param basis the identity (initial default value) for the reduction
4936	>	* @param reducer a commutative associative combining function
4937	>	* @return the task
4938	>	*/
4939	>	public static <K,V> ForkJoinTask<Long> reduceKeysToLong
4940	>	(ConcurrentHashMapV8<K,V> map,
4941	>	ObjectToLong<? super K> transformer,
4942	>	long basis,
4943	>	LongByLongToLong reducer) {
4944	>	if (transformer == null || reducer == null)
4945	>	throw new NullPointerException();
4946	>	return new MapReduceKeysToLongTask<K,V>
4947	>	(map, null, -1, null, transformer, basis, reducer);
4948	>	}
4949	>
4950	>	/**
4951	>	* Returns a task that when invoked, returns the result of
4952	>	* accumulating the given transformation of all keys using the given
4953	>	* reducer to combine values, and the given basis as an
4954	>	* identity value.
4955	>	*
4956	>	* @param map the map
4957	>	* @param transformer a function returning the transformation
4958	>	* for an element
4959	>	* @param basis the identity (initial default value) for the reduction
4960	>	* @param reducer a commutative associative combining function
4961	>	* @return the task
4962	>	*/
4963	>	public static <K,V> ForkJoinTask<Integer> reduceKeysToInt
4964	>	(ConcurrentHashMapV8<K,V> map,
4965	>	ObjectToInt<? super K> transformer,
4966	>	int basis,
4967	>	IntByIntToInt reducer) {
4968	>	if (transformer == null || reducer == null)
4969	>	throw new NullPointerException();
4970	>	return new MapReduceKeysToIntTask<K,V>
4971	>	(map, null, -1, null, transformer, basis, reducer);
4972	>	}
4973	>
4974	>	/**
4975	>	* Returns a task that when invoked, performs the given action
4976	>	* for each value.
4977	>	*
4978	>	* @param map the map
4979	>	* @param action the action
4980	>	*/
4981	>	public static <K,V> ForkJoinTask<Void> forEachValue
4982	>	(ConcurrentHashMapV8<K,V> map,
4983	>	Action<V> action) {
4984	>	if (action == null) throw new NullPointerException();
4985	>	return new ForEachValueTask<K,V>(map, null, -1, null, action);
4986	>	}
4987	>
4988	>	/**
4989	>	* Returns a task that when invoked, performs the given action
4990	>	* for each non-null transformation of each value.
4991	>	*
4992	>	* @param map the map
4993	>	* @param transformer a function returning the transformation
4994	>	* for an element, or null if there is no transformation (in
4995	>	* which case the action is not applied)
4996	>	* @param action the action
4997	>	*/
4998	>	public static <K,V,U> ForkJoinTask<Void> forEachValue
4999	>	(ConcurrentHashMapV8<K,V> map,
5000	>	Fun<? super V, ? extends U> transformer,
5001	>	Action<U> action) {
5002	>	if (transformer == null || action == null)
5003	>	throw new NullPointerException();
5004	>	return new ForEachTransformedValueTask<K,V,U>
5005	>	(map, null, -1, null, transformer, action);
5006	>	}
5007	>
5008	>	/**
5009	>	* Returns a task that when invoked, returns a non-null result
5010	>	* from applying the given search function on each value, or
5011	>	* null if none.  Upon success, further element processing is
5012	>	* suppressed and the results of any other parallel
5013	>	* invocations of the search function are ignored.
5014	>	*
5015	>	* @param map the map
5016	>	* @param searchFunction a function returning a non-null
5017	>	* result on success, else null
5018	>	* @return the task
5019	>	*/
5020	>	public static <K,V,U> ForkJoinTask<U> searchValues
5021	>	(ConcurrentHashMapV8<K,V> map,
5022	>	Fun<? super V, ? extends U> searchFunction) {
5023	>	if (searchFunction == null) throw new NullPointerException();
5024	>	return new SearchValuesTask<K,V,U>
5025	>	(map, null, -1, null, searchFunction,
5026	>	new AtomicReference<U>());
5027	>	}
5028	>
5029	>	/**
5030	>	* Returns a task that when invoked, returns the result of
5031	>	* accumulating all values using the given reducer to combine
5032	>	* values, or null if none.
5033	>	*
5034	>	* @param map the map
5035	>	* @param reducer a commutative associative combining function
5036	>	* @return the task
5037	>	*/
5038	>	public static <K,V> ForkJoinTask<V> reduceValues
5039	>	(ConcurrentHashMapV8<K,V> map,
5040	>	BiFun<? super V, ? super V, ? extends V> reducer) {
5041	>	if (reducer == null) throw new NullPointerException();
5042	>	return new ReduceValuesTask<K,V>
5043	>	(map, null, -1, null, reducer);
5044	>	}
5045	>
5046	>	/**
5047	>	* Returns a task that when invoked, returns the result of
5048	>	* accumulating the given transformation of all values using the
5049	>	* given reducer to combine values, or null if none.
5050	>	*
5051	>	* @param map the map
5052	>	* @param transformer a function returning the transformation
5053	>	* for an element, or null if there is no transformation (in
5054	>	* which case it is not combined).
5055	>	* @param reducer a commutative associative combining function
5056	>	* @return the task
5057	>	*/
5058	>	public static <K,V,U> ForkJoinTask<U> reduceValues
5059	>	(ConcurrentHashMapV8<K,V> map,
5060	>	Fun<? super V, ? extends U> transformer,
5061	>	BiFun<? super U, ? super U, ? extends U> reducer) {
5062	>	if (transformer == null || reducer == null)
5063	>	throw new NullPointerException();
5064	>	return new MapReduceValuesTask<K,V,U>
5065	>	(map, null, -1, null, transformer, reducer);
5066	>	}
5067	>
5068	>	/**
5069	>	* Returns a task that when invoked, returns the result of
5070	>	* accumulating the given transformation of all values using the
5071	>	* given reducer to combine values, and the given basis as an
5072	>	* identity value.
5073	>	*
5074	>	* @param map the map
5075	>	* @param transformer a function returning the transformation
5076	>	* for an element
5077	>	* @param basis the identity (initial default value) for the reduction
5078	>	* @param reducer a commutative associative combining function
5079	>	* @return the task
5080	>	*/
5081	>	public static <K,V> ForkJoinTask<Double> reduceValuesToDouble
5082	>	(ConcurrentHashMapV8<K,V> map,
5083	>	ObjectToDouble<? super V> transformer,
5084	>	double basis,
5085	>	DoubleByDoubleToDouble reducer) {
5086	>	if (transformer == null || reducer == null)
5087	>	throw new NullPointerException();
5088	>	return new MapReduceValuesToDoubleTask<K,V>
5089	>	(map, null, -1, null, transformer, basis, reducer);
5090	>	}
5091	>
5092	>	/**
5093	>	* Returns a task that when invoked, returns the result of
5094	>	* accumulating the given transformation of all values using the
5095	>	* given reducer to combine values, and the given basis as an
5096	>	* identity value.
5097	>	*
5098	>	* @param map the map
5099	>	* @param transformer a function returning the transformation
5100	>	* for an element
5101	>	* @param basis the identity (initial default value) for the reduction
5102	>	* @param reducer a commutative associative combining function
5103	>	* @return the task
5104	>	*/
5105	>	public static <K,V> ForkJoinTask<Long> reduceValuesToLong
5106	>	(ConcurrentHashMapV8<K,V> map,
5107	>	ObjectToLong<? super V> transformer,
5108	>	long basis,
5109	>	LongByLongToLong reducer) {
5110	>	if (transformer == null || reducer == null)
5111	>	throw new NullPointerException();
5112	>	return new MapReduceValuesToLongTask<K,V>
5113	>	(map, null, -1, null, transformer, basis, reducer);
5114	>	}
5115	>
5116	>	/**
5117	>	* Returns a task that when invoked, returns the result of
5118	>	* accumulating the given transformation of all values using the
5119	>	* given reducer to combine values, and the given basis as an
5120	>	* identity value.
5121	>	*
5122	>	* @param map the map
5123	>	* @param transformer a function returning the transformation
5124	>	* for an element
5125	>	* @param basis the identity (initial default value) for the reduction
5126	>	* @param reducer a commutative associative combining function
5127	>	* @return the task
5128	>	*/
5129	>	public static <K,V> ForkJoinTask<Integer> reduceValuesToInt
5130	>	(ConcurrentHashMapV8<K,V> map,
5131	>	ObjectToInt<? super V> transformer,
5132	>	int basis,
5133	>	IntByIntToInt reducer) {
5134	>	if (transformer == null || reducer == null)
5135	>	throw new NullPointerException();
5136	>	return new MapReduceValuesToIntTask<K,V>
5137	>	(map, null, -1, null, transformer, basis, reducer);
5138	>	}
5139	>
5140	>	/**
5141	>	* Returns a task that when invoked, perform the given action
5142	>	* for each entry.
5143	>	*
5144	>	* @param map the map
5145	>	* @param action the action
5146	>	*/
5147	>	public static <K,V> ForkJoinTask<Void> forEachEntry
5148	>	(ConcurrentHashMapV8<K,V> map,
5149	>	Action<Map.Entry<K,V>> action) {
5150	>	if (action == null) throw new NullPointerException();
5151	>	return new ForEachEntryTask<K,V>(map, null, -1, null, action);
5152	>	}
5153	>
5154	>	/**
5155	>	* Returns a task that when invoked, perform the given action
5156	>	* for each non-null transformation of each entry.
5157	>	*
5158	>	* @param map the map
5159	>	* @param transformer a function returning the transformation
5160	>	* for an element, or null if there is no transformation (in
5161	>	* which case the action is not applied)
5162	>	* @param action the action
5163	>	*/
5164	>	public static <K,V,U> ForkJoinTask<Void> forEachEntry
5165	>	(ConcurrentHashMapV8<K,V> map,
5166	>	Fun<Map.Entry<K,V>, ? extends U> transformer,
5167	>	Action<U> action) {
5168	>	if (transformer == null || action == null)
5169	>	throw new NullPointerException();
5170	>	return new ForEachTransformedEntryTask<K,V,U>
5171	>	(map, null, -1, null, transformer, action);
5172	>	}
5173	>
5174	>	/**
5175	>	* Returns a task that when invoked, returns a non-null result
5176	>	* from applying the given search function on each entry, or
5177	>	* null if none.  Upon success, further element processing is
5178	>	* suppressed and the results of any other parallel
5179	>	* invocations of the search function are ignored.
5180	>	*
5181	>	* @param map the map
5182	>	* @param searchFunction a function returning a non-null
5183	>	* result on success, else null
5184	>	* @return the task
5185	>	*/
5186	>	public static <K,V,U> ForkJoinTask<U> searchEntries
5187	>	(ConcurrentHashMapV8<K,V> map,
5188	>	Fun<Map.Entry<K,V>, ? extends U> searchFunction) {
5189	>	if (searchFunction == null) throw new NullPointerException();
5190	>	return new SearchEntriesTask<K,V,U>
5191	>	(map, null, -1, null, searchFunction,
5192	>	new AtomicReference<U>());
5193	>	}
5194	>
5195	>	/**
5196	>	* Returns a task that when invoked, returns the result of
5197	>	* accumulating all entries using the given reducer to combine
5198	>	* values, or null if none.
5199	>	*
5200	>	* @param map the map
5201	>	* @param reducer a commutative associative combining function
5202	>	* @return the task
5203	>	*/
5204	>	public static <K,V> ForkJoinTask<Map.Entry<K,V>> reduceEntries
5205	>	(ConcurrentHashMapV8<K,V> map,
5206	>	BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
5207	>	if (reducer == null) throw new NullPointerException();
5208	>	return new ReduceEntriesTask<K,V>
5209	>	(map, null, -1, null, reducer);
5210	>	}
5211	>
5212	>	/**
5213	>	* Returns a task that when invoked, returns the result of
5214	>	* accumulating the given transformation of all entries using the
5215	>	* given reducer to combine values, or null if none.
5216	>	*
5217	>	* @param map the map
5218	>	* @param transformer a function returning the transformation
5219	>	* for an element, or null if there is no transformation (in
5220	>	* which case it is not combined).
5221	>	* @param reducer a commutative associative combining function
5222	>	* @return the task
5223	>	*/
5224	>	public static <K,V,U> ForkJoinTask<U> reduceEntries
5225	>	(ConcurrentHashMapV8<K,V> map,
5226	>	Fun<Map.Entry<K,V>, ? extends U> transformer,
5227	>	BiFun<? super U, ? super U, ? extends U> reducer) {
5228	>	if (transformer == null || reducer == null)
5229	>	throw new NullPointerException();
5230	>	return new MapReduceEntriesTask<K,V,U>
5231	>	(map, null, -1, null, transformer, reducer);
5232	>	}
5233	>
5234	>	/**
5235	>	* Returns a task that when invoked, returns the result of
5236	>	* accumulating the given transformation of all entries using the
5237	>	* given reducer to combine values, and the given basis as an
5238	>	* identity value.
5239	>	*
5240	>	* @param map the map
5241	>	* @param transformer a function returning the transformation
5242	>	* for an element
5243	>	* @param basis the identity (initial default value) for the reduction
5244	>	* @param reducer a commutative associative combining function
5245	>	* @return the task
5246	>	*/
5247	>	public static <K,V> ForkJoinTask<Double> reduceEntriesToDouble
5248	>	(ConcurrentHashMapV8<K,V> map,
5249	>	ObjectToDouble<Map.Entry<K,V>> transformer,
5250	>	double basis,
5251	>	DoubleByDoubleToDouble reducer) {
5252	>	if (transformer == null || reducer == null)
5253	>	throw new NullPointerException();
5254	>	return new MapReduceEntriesToDoubleTask<K,V>
5255	>	(map, null, -1, null, transformer, basis, reducer);
5256	>	}
5257	>
5258	>	/**
5259	>	* Returns a task that when invoked, returns the result of
5260	>	* accumulating the given transformation of all entries using the
5261	>	* given reducer to combine values, and the given basis as an
5262	>	* identity value.
5263	>	*
5264	>	* @param map the map
5265	>	* @param transformer a function returning the transformation
5266	>	* for an element
5267	>	* @param basis the identity (initial default value) for the reduction
5268	>	* @param reducer a commutative associative combining function
5269	>	* @return the task
5270	>	*/
5271	>	public static <K,V> ForkJoinTask<Long> reduceEntriesToLong
5272	>	(ConcurrentHashMapV8<K,V> map,
5273	>	ObjectToLong<Map.Entry<K,V>> transformer,
5274	>	long basis,
5275	>	LongByLongToLong reducer) {
5276	>	if (transformer == null || reducer == null)
5277	>	throw new NullPointerException();
5278	>	return new MapReduceEntriesToLongTask<K,V>
5279	>	(map, null, -1, null, transformer, basis, reducer);
5280	>	}
5281	>
5282	>	/**
5283	>	* Returns a task that when invoked, returns the result of
5284	>	* accumulating the given transformation of all entries using the
5285	>	* given reducer to combine values, and the given basis as an
5286	>	* identity value.
5287	>	*
5288	>	* @param map the map
5289	>	* @param transformer a function returning the transformation
5290	>	* for an element
5291	>	* @param basis the identity (initial default value) for the reduction
5292	>	* @param reducer a commutative associative combining function
5293	>	* @return the task
5294	>	*/
5295	>	public static <K,V> ForkJoinTask<Integer> reduceEntriesToInt
5296	>	(ConcurrentHashMapV8<K,V> map,
5297	>	ObjectToInt<Map.Entry<K,V>> transformer,
5298	>	int basis,
5299	>	IntByIntToInt reducer) {
5300	>	if (transformer == null || reducer == null)
5301	>	throw new NullPointerException();
5302	>	return new MapReduceEntriesToIntTask<K,V>
5303	>	(map, null, -1, null, transformer, basis, reducer);
5304	>	}
5305		}
5306
5307	<	/**
5308	<	* Saves the state of the {@code ConcurrentHashMapV8} instance to a
5309	<	* stream (i.e., serializes it).
5310	<	* @param s the stream
5311	<	* @serialData
5312	<	* the key (Object) and value (Object)
5313	<	* for each key-value mapping, followed by a null pair.
5314	<	* The key-value mappings are emitted in no particular order.
5315	<	*/
5316	<	@SuppressWarnings("unchecked")
5317	<	private void writeObject(java.io.ObjectOutputStream s)
5318	<	throws java.io.IOException {
5319	<	if (segments == null) { // for serialization compatibility
5320	<	segments = (Segment<K,V>[])
5321	<	new Segment<?,?>[DEFAULT_CONCURRENCY_LEVEL];
5322	<	for (int i = 0; i < segments.length; ++i)
5323	<	segments[i] = new Segment<K,V>(LOAD_FACTOR);
5307	>	// -------------------------------------------------------
5308	>
5309	>	/**
5310	>	* Base for FJ tasks for bulk operations. This adds a variant of
5311	>	* CountedCompleters and some split and merge bookkeeping to
5312	>	* iterator functionality. The forEach and reduce methods are
5313	>	* similar to those illustrated in CountedCompleter documentation,
5314	>	* except that bottom-up reduction completions perform them within
5315	>	* their compute methods. The search methods are like forEach
5316	>	* except they continually poll for success and exit early.  Also,
5317	>	* exceptions are handled in a simpler manner, by just trying to
5318	>	* complete root task exceptionally.
5319	>	*/
5320	>	@SuppressWarnings("serial") static abstract class BulkTask<K,V,R> extends Traverser<K,V,R> {
5321	>	final BulkTask<K,V,?> parent;  // completion target
5322	>	int batch;                     // split control; -1 for unknown
5323	>	int pending;                   // completion control
5324	>
5325	>	BulkTask(ConcurrentHashMapV8<K,V> map, BulkTask<K,V,?> parent,
5326	>	int batch) {
5327	>	super(map);
5328	>	this.parent = parent;
5329	>	this.batch = batch;
5330	>	if (parent != null && map != null) { // split parent
5331	>	Node[] t;
5332	>	if ((t = parent.tab) == null &&
5333	>	(t = parent.tab = map.table) != null)
5334	>	parent.baseLimit = parent.baseSize = t.length;
5335	>	this.tab = t;
5336	>	this.baseSize = parent.baseSize;
5337	>	int hi = this.baseLimit = parent.baseLimit;
5338	>	parent.baseLimit = this.index = this.baseIndex =
5339	>	(hi + parent.baseIndex + 1) >>> 1;
5340	>	}
5341		}
5342	<	s.defaultWriteObject();
5343	<	InternalIterator it = new InternalIterator(table);
5344	<	while (it.next != null) {
5345	<	s.writeObject(it.nextKey);
5346	<	s.writeObject(it.nextVal);
5347	<	it.advance();
5342	>
5343	>	/**
5344	>	* Forces root task to complete.
5345	>	* @param ex if null, complete normally, else exceptionally
5346	>	* @return false to simplify use
5347	>	*/
5348	>	final boolean tryCompleteComputation(Throwable ex) {
5349	>	for (BulkTask<K,V,?> a = this;;) {
5350	>	BulkTask<K,V,?> p = a.parent;
5351	>	if (p == null) {
5352	>	if (ex != null)
5353	>	a.completeExceptionally(ex);
5354	>	else
5355	>	a.quietlyComplete();
5356	>	return false;
5357	>	}
5358	>	a = p;
5359	>	}
5360	>	}
5361	>
5362	>	/**
5363	>	* Version of tryCompleteComputation for function screening checks
5364	>	*/
5365	>	final boolean abortOnNullFunction() {
5366	>	return tryCompleteComputation(new Error("Unexpected null function"));
5367	>	}
5368	>
5369	>	// utilities
5370	>
5371	>	/** CompareAndSet pending count */
5372	>	final boolean casPending(int cmp, int val) {
5373	>	return U.compareAndSwapInt(this, PENDING, cmp, val);
5374	>	}
5375	>
5376	>	/**
5377	>	* Returns approx exp2 of the number of times (minus one) to
5378	>	* split task by two before executing leaf action. This value
5379	>	* is faster to compute and more convenient to use as a guide
5380	>	* to splitting than is the depth, since it is used while
5381	>	* dividing by two anyway.
5382	>	*/
5383	>	final int batch() {
5384	>	ConcurrentHashMapV8<K, V> m; int b; Node[] t;  ForkJoinPool pool;
5385	>	if ((b = batch) < 0 && (m = map) != null) { // force initialization
5386	>	if ((t = tab) == null && (t = tab = m.table) != null)
5387	>	baseLimit = baseSize = t.length;
5388	>	if (t != null) {
5389	>	long n = m.counter.sum();
5390	>	int par = ((pool = getPool()) == null) ?
5391	>	ForkJoinPool.getCommonPoolParallelism() :
5392	>	pool.getParallelism();
5393	>	int sp = par << 3; // slack of 8
5394	>	b = batch = (n <= 0L) ? 0 : (n < (long)sp) ? (int)n : sp;
5395	>	}
5396	>	}
5397	>	return b;
5398	>	}
5399	>
5400	>	/**
5401	>	* Returns exportable snapshot entry.
5402	>	*/
5403	>	static <K,V> AbstractMap.SimpleEntry<K,V> entryFor(K k, V v) {
5404	>	return new AbstractMap.SimpleEntry<K,V>(k, v);
5405	>	}
5406	>
5407	>	// Unsafe mechanics
5408	>	private static final sun.misc.Unsafe U;
5409	>	private static final long PENDING;
5410	>	static {
5411	>	try {
5412	>	U = getUnsafe();
5413	>	PENDING = U.objectFieldOffset
5414	>	(BulkTask.class.getDeclaredField("pending"));
5415	>	} catch (Exception e) {
5416	>	throw new Error(e);
5417	>	}
5418		}
2348	–	s.writeObject(null);
2349	–	s.writeObject(null);
2350	–	segments = null; // throw away
5419		}
5420
5421		/**
5422	<	* Reconstitutes the instance from a stream (that is, deserializes it).
2355	<	* @param s the stream
5422	>	* Base class for non-reductive actions
5423		*/
5424	<	@SuppressWarnings("unchecked")
5425	<	private void readObject(java.io.ObjectInputStream s)
5426	<	throws java.io.IOException, ClassNotFoundException {
5427	<	s.defaultReadObject();
5428	<	this.segments = null; // unneeded
5429	<	// initialize transient final field
5430	<	UNSAFE.putObjectVolatile(this, counterOffset, new LongAdder());
5424	>	@SuppressWarnings("serial") static abstract class BulkAction<K,V,R> extends BulkTask<K,V,R> {
5425	>	BulkAction<K,V,?> nextTask;
5426	>	BulkAction(ConcurrentHashMapV8<K,V> map, BulkTask<K,V,?> parent,
5427	>	int batch, BulkAction<K,V,?> nextTask) {
5428	>	super(map, parent, batch);
5429	>	this.nextTask = nextTask;
5430	>	}
5431
5432	<	// Create all nodes, then place in table once size is known
5433	<	long size = 0L;
5434	<	Node p = null;
5435	<	for (;;) {
5436	<	K k = (K) s.readObject();
5437	<	V v = (V) s.readObject();
5438	<	if (k != null && v != null) {
5439	<	p = new Node(spread(k.hashCode()), k, v, p);
5440	<	++size;
5432	>	/**
5433	>	* Try to complete task and upward parents. Upon hitting
5434	>	* non-completed parent, if a non-FJ task, try to help out the
5435	>	* computation.
5436	>	*/
5437	>	final void tryComplete(BulkAction<K,V,?> subtasks) {
5438	>	BulkTask<K,V,?> a = this, s = a;
5439	>	for (int c;;) {
5440	>	if ((c = a.pending) == 0) {
5441	>	if ((a = (s = a).parent) == null) {
5442	>	s.quietlyComplete();
5443	>	break;
5444	>	}
5445	>	}
5446	>	else if (a.casPending(c, c - 1)) {
5447	>	if (subtasks != null && !inForkJoinPool()) {
5448	>	while ((s = a.parent) != null)
5449	>	a = s;
5450	>	while (!a.isDone()) {
5451	>	BulkAction<K,V,?> next = subtasks.nextTask;
5452	>	if (subtasks.tryUnfork())
5453	>	subtasks.exec();
5454	>	if ((subtasks = next) == null)
5455	>	break;
5456	>	}
5457	>	}
5458	>	break;
5459	>	}
5460		}
2375	–	else
2376	–	break;
5461		}
5462	<	if (p != null) {
5463	<	boolean init = false;
5464	<	int n;
5465	<	if (size >= (long)(MAXIMUM_CAPACITY >>> 1))
5466	<	n = MAXIMUM_CAPACITY;
5467	<	else {
5468	<	int sz = (int)size;
5469	<	n = tableSizeFor(sz + (sz >>> 1) + 1);
5462	>
5463	>	}
5464	>
5465	>	/*
5466	>	* Task classes. Coded in a regular but ugly format/style to
5467	>	* simplify checks that each variant differs in the right way from
5468	>	* others.
5469	>	*/
5470	>
5471	>	@SuppressWarnings("serial") static final class ForEachKeyTask<K,V>
5472	>	extends BulkAction<K,V,Void> {
5473	>	final Action<K> action;
5474	>	ForEachKeyTask
5475	>	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5476	>	ForEachKeyTask<K,V> nextTask,
5477	>	Action<K> action) {
5478	>	super(m, p, b, nextTask);
5479	>	this.action = action;
5480	>	}
5481	>	@SuppressWarnings("unchecked") public final boolean exec() {
5482	>	final Action<K> action = this.action;
5483	>	if (action == null)
5484	>	return abortOnNullFunction();
5485	>	ForEachKeyTask<K,V> subtasks = null;
5486	>	try {
5487	>	int b = batch(), c;
5488	>	while (b > 1 && baseIndex != baseLimit) {
5489	>	do {} while (!casPending(c = pending, c+1));
5490	>	(subtasks = new ForEachKeyTask<K,V>
5491	>	(map, this, b >>>= 1, subtasks, action)).fork();
5492	>	}
5493	>	while (advance() != null)
5494	>	action.apply((K)nextKey);
5495	>	} catch (Throwable ex) {
5496	>	return tryCompleteComputation(ex);
5497		}
5498	<	int sc = sizeCtl;
5499	<	if (n > sc &&
5500	<	UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) {
5501	<	try {
5502	<	if (table == null) {
5503	<	init = true;
5504	<	Node[] tab = new Node[n];
5505	<	int mask = n - 1;
5506	<	while (p != null) {
5507	<	int j = p.hash & mask;
5508	<	Node next = p.next;
5509	<	p.next = tabAt(tab, j);
5510	<	setTabAt(tab, j, p);
5511	<	p = next;
5498	>	tryComplete(subtasks);
5499	>	return false;
5500	>	}
5501	>	}
5502	>
5503	>	@SuppressWarnings("serial") static final class ForEachValueTask<K,V>
5504	>	extends BulkAction<K,V,Void> {
5505	>	final Action<V> action;
5506	>	ForEachValueTask
5507	>	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5508	>	ForEachValueTask<K,V> nextTask,
5509	>	Action<V> action) {
5510	>	super(m, p, b, nextTask);
5511	>	this.action = action;
5512	>	}
5513	>	@SuppressWarnings("unchecked") public final boolean exec() {
5514	>	final Action<V> action = this.action;
5515	>	if (action == null)
5516	>	return abortOnNullFunction();
5517	>	ForEachValueTask<K,V> subtasks = null;
5518	>	try {
5519	>	int b = batch(), c;
5520	>	while (b > 1 && baseIndex != baseLimit) {
5521	>	do {} while (!casPending(c = pending, c+1));
5522	>	(subtasks = new ForEachValueTask<K,V>
5523	>	(map, this, b >>>= 1, subtasks, action)).fork();
5524	>	}
5525	>	Object v;
5526	>	while ((v = advance()) != null)
5527	>	action.apply((V)v);
5528	>	} catch (Throwable ex) {
5529	>	return tryCompleteComputation(ex);
5530	>	}
5531	>	tryComplete(subtasks);
5532	>	return false;
5533	>	}
5534	>	}
5535	>
5536	>	@SuppressWarnings("serial") static final class ForEachEntryTask<K,V>
5537	>	extends BulkAction<K,V,Void> {
5538	>	final Action<Entry<K,V>> action;
5539	>	ForEachEntryTask
5540	>	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5541	>	ForEachEntryTask<K,V> nextTask,
5542	>	Action<Entry<K,V>> action) {
5543	>	super(m, p, b, nextTask);
5544	>	this.action = action;
5545	>	}
5546	>	@SuppressWarnings("unchecked") public final boolean exec() {
5547	>	final Action<Entry<K,V>> action = this.action;
5548	>	if (action == null)
5549	>	return abortOnNullFunction();
5550	>	ForEachEntryTask<K,V> subtasks = null;
5551	>	try {
5552	>	int b = batch(), c;
5553	>	while (b > 1 && baseIndex != baseLimit) {
5554	>	do {} while (!casPending(c = pending, c+1));
5555	>	(subtasks = new ForEachEntryTask<K,V>
5556	>	(map, this, b >>>= 1, subtasks, action)).fork();
5557	>	}
5558	>	Object v;
5559	>	while ((v = advance()) != null)
5560	>	action.apply(entryFor((K)nextKey, (V)v));
5561	>	} catch (Throwable ex) {
5562	>	return tryCompleteComputation(ex);
5563	>	}
5564	>	tryComplete(subtasks);
5565	>	return false;
5566	>	}
5567	>	}
5568	>
5569	>	@SuppressWarnings("serial") static final class ForEachMappingTask<K,V>
5570	>	extends BulkAction<K,V,Void> {
5571	>	final BiAction<K,V> action;
5572	>	ForEachMappingTask
5573	>	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5574	>	ForEachMappingTask<K,V> nextTask,
5575	>	BiAction<K,V> action) {
5576	>	super(m, p, b, nextTask);
5577	>	this.action = action;
5578	>	}
5579	>	@SuppressWarnings("unchecked") public final boolean exec() {
5580	>	final BiAction<K,V> action = this.action;
5581	>	if (action == null)
5582	>	return abortOnNullFunction();
5583	>	ForEachMappingTask<K,V> subtasks = null;
5584	>	try {
5585	>	int b = batch(), c;
5586	>	while (b > 1 && baseIndex != baseLimit) {
5587	>	do {} while (!casPending(c = pending, c+1));
5588	>	(subtasks = new ForEachMappingTask<K,V>
5589	>	(map, this, b >>>= 1, subtasks, action)).fork();
5590	>	}
5591	>	Object v;
5592	>	while ((v = advance()) != null)
5593	>	action.apply((K)nextKey, (V)v);
5594	>	} catch (Throwable ex) {
5595	>	return tryCompleteComputation(ex);
5596	>	}
5597	>	tryComplete(subtasks);
5598	>	return false;
5599	>	}
5600	>	}
5601	>
5602	>	@SuppressWarnings("serial") static final class ForEachTransformedKeyTask<K,V,U>
5603	>	extends BulkAction<K,V,Void> {
5604	>	final Fun<? super K, ? extends U> transformer;
5605	>	final Action<U> action;
5606	>	ForEachTransformedKeyTask
5607	>	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5608	>	ForEachTransformedKeyTask<K,V,U> nextTask,
5609	>	Fun<? super K, ? extends U> transformer,
5610	>	Action<U> action) {
5611	>	super(m, p, b, nextTask);
5612	>	this.transformer = transformer;
5613	>	this.action = action;
5614	>
5615	>	}
5616	>	@SuppressWarnings("unchecked") public final boolean exec() {
5617	>	final Fun<? super K, ? extends U> transformer =
5618	>	this.transformer;
5619	>	final Action<U> action = this.action;
5620	>	if (transformer == null || action == null)
5621	>	return abortOnNullFunction();
5622	>	ForEachTransformedKeyTask<K,V,U> subtasks = null;
5623	>	try {
5624	>	int b = batch(), c;
5625	>	while (b > 1 && baseIndex != baseLimit) {
5626	>	do {} while (!casPending(c = pending, c+1));
5627	>	(subtasks = new ForEachTransformedKeyTask<K,V,U>
5628	>	(map, this, b >>>= 1, subtasks, transformer, action)).fork();
5629	>	}
5630	>	U u;
5631	>	while (advance() != null) {
5632	>	if ((u = transformer.apply((K)nextKey)) != null)
5633	>	action.apply(u);
5634	>	}
5635	>	} catch (Throwable ex) {
5636	>	return tryCompleteComputation(ex);
5637	>	}
5638	>	tryComplete(subtasks);
5639	>	return false;
5640	>	}
5641	>	}
5642	>
5643	>	@SuppressWarnings("serial") static final class ForEachTransformedValueTask<K,V,U>
5644	>	extends BulkAction<K,V,Void> {
5645	>	final Fun<? super V, ? extends U> transformer;
5646	>	final Action<U> action;
5647	>	ForEachTransformedValueTask
5648	>	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5649	>	ForEachTransformedValueTask<K,V,U> nextTask,
5650	>	Fun<? super V, ? extends U> transformer,
5651	>	Action<U> action) {
5652	>	super(m, p, b, nextTask);
5653	>	this.transformer = transformer;
5654	>	this.action = action;
5655	>
5656	>	}
5657	>	@SuppressWarnings("unchecked") public final boolean exec() {
5658	>	final Fun<? super V, ? extends U> transformer =
5659	>	this.transformer;
5660	>	final Action<U> action = this.action;
5661	>	if (transformer == null || action == null)
5662	>	return abortOnNullFunction();
5663	>	ForEachTransformedValueTask<K,V,U> subtasks = null;
5664	>	try {
5665	>	int b = batch(), c;
5666	>	while (b > 1 && baseIndex != baseLimit) {
5667	>	do {} while (!casPending(c = pending, c+1));
5668	>	(subtasks = new ForEachTransformedValueTask<K,V,U>
5669	>	(map, this, b >>>= 1, subtasks, transformer, action)).fork();
5670	>	}
5671	>	Object v; U u;
5672	>	while ((v = advance()) != null) {
5673	>	if ((u = transformer.apply((V)v)) != null)
5674	>	action.apply(u);
5675	>	}
5676	>	} catch (Throwable ex) {
5677	>	return tryCompleteComputation(ex);
5678	>	}
5679	>	tryComplete(subtasks);
5680	>	return false;
5681	>	}
5682	>	}
5683	>
5684	>	@SuppressWarnings("serial") static final class ForEachTransformedEntryTask<K,V,U>
5685	>	extends BulkAction<K,V,Void> {
5686	>	final Fun<Map.Entry<K,V>, ? extends U> transformer;
5687	>	final Action<U> action;
5688	>	ForEachTransformedEntryTask
5689	>	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5690	>	ForEachTransformedEntryTask<K,V,U> nextTask,
5691	>	Fun<Map.Entry<K,V>, ? extends U> transformer,
5692	>	Action<U> action) {
5693	>	super(m, p, b, nextTask);
5694	>	this.transformer = transformer;
5695	>	this.action = action;
5696	>
5697	>	}
5698	>	@SuppressWarnings("unchecked") public final boolean exec() {
5699	>	final Fun<Map.Entry<K,V>, ? extends U> transformer =
5700	>	this.transformer;
5701	>	final Action<U> action = this.action;
5702	>	if (transformer == null || action == null)
5703	>	return abortOnNullFunction();
5704	>	ForEachTransformedEntryTask<K,V,U> subtasks = null;
5705	>	try {
5706	>	int b = batch(), c;
5707	>	while (b > 1 && baseIndex != baseLimit) {
5708	>	do {} while (!casPending(c = pending, c+1));
5709	>	(subtasks = new ForEachTransformedEntryTask<K,V,U>
5710	>	(map, this, b >>>= 1, subtasks, transformer, action)).fork();
5711	>	}
5712	>	Object v; U u;
5713	>	while ((v = advance()) != null) {
5714	>	if ((u = transformer.apply(entryFor((K)nextKey, (V)v))) != null)
5715	>	action.apply(u);
5716	>	}
5717	>	} catch (Throwable ex) {
5718	>	return tryCompleteComputation(ex);
5719	>	}
5720	>	tryComplete(subtasks);
5721	>	return false;
5722	>	}
5723	>	}
5724	>
5725	>	@SuppressWarnings("serial") static final class ForEachTransformedMappingTask<K,V,U>
5726	>	extends BulkAction<K,V,Void> {
5727	>	final BiFun<? super K, ? super V, ? extends U> transformer;
5728	>	final Action<U> action;
5729	>	ForEachTransformedMappingTask
5730	>	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5731	>	ForEachTransformedMappingTask<K,V,U> nextTask,
5732	>	BiFun<? super K, ? super V, ? extends U> transformer,
5733	>	Action<U> action) {
5734	>	super(m, p, b, nextTask);
5735	>	this.transformer = transformer;
5736	>	this.action = action;
5737	>
5738	>	}
5739	>	@SuppressWarnings("unchecked") public final boolean exec() {
5740	>	final BiFun<? super K, ? super V, ? extends U> transformer =
5741	>	this.transformer;
5742	>	final Action<U> action = this.action;
5743	>	if (transformer == null || action == null)
5744	>	return abortOnNullFunction();
5745	>	ForEachTransformedMappingTask<K,V,U> subtasks = null;
5746	>	try {
5747	>	int b = batch(), c;
5748	>	while (b > 1 && baseIndex != baseLimit) {
5749	>	do {} while (!casPending(c = pending, c+1));
5750	>	(subtasks = new ForEachTransformedMappingTask<K,V,U>
5751	>	(map, this, b >>>= 1, subtasks, transformer, action)).fork();
5752	>	}
5753	>	Object v; U u;
5754	>	while ((v = advance()) != null) {
5755	>	if ((u = transformer.apply((K)nextKey, (V)v)) != null)
5756	>	action.apply(u);
5757	>	}
5758	>	} catch (Throwable ex) {
5759	>	return tryCompleteComputation(ex);
5760	>	}
5761	>	tryComplete(subtasks);
5762	>	return false;
5763	>	}
5764	>	}
5765	>
5766	>	@SuppressWarnings("serial") static final class SearchKeysTask<K,V,U>
5767	>	extends BulkAction<K,V,U> {
5768	>	final Fun<? super K, ? extends U> searchFunction;
5769	>	final AtomicReference<U> result;
5770	>	SearchKeysTask
5771	>	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5772	>	SearchKeysTask<K,V,U> nextTask,
5773	>	Fun<? super K, ? extends U> searchFunction,
5774	>	AtomicReference<U> result) {
5775	>	super(m, p, b, nextTask);
5776	>	this.searchFunction = searchFunction; this.result = result;
5777	>	}
5778	>	@SuppressWarnings("unchecked") public final boolean exec() {
5779	>	AtomicReference<U> result = this.result;
5780	>	final Fun<? super K, ? extends U> searchFunction =
5781	>	this.searchFunction;
5782	>	if (searchFunction == null || result == null)
5783	>	return abortOnNullFunction();
5784	>	SearchKeysTask<K,V,U> subtasks = null;
5785	>	try {
5786	>	int b = batch(), c;
5787	>	while (b > 1 && baseIndex != baseLimit && result.get() == null) {
5788	>	do {} while (!casPending(c = pending, c+1));
5789	>	(subtasks = new SearchKeysTask<K,V,U>
5790	>	(map, this, b >>>= 1, subtasks, searchFunction, result)).fork();
5791	>	}
5792	>	U u;
5793	>	while (result.get() == null && advance() != null) {
5794	>	if ((u = searchFunction.apply((K)nextKey)) != null) {
5795	>	if (result.compareAndSet(null, u))
5796	>	tryCompleteComputation(null);
5797	>	break;
5798	>	}
5799	>	}
5800	>	} catch (Throwable ex) {
5801	>	return tryCompleteComputation(ex);
5802	>	}
5803	>	tryComplete(subtasks);
5804	>	return false;
5805	>	}
5806	>	public final U getRawResult() { return result.get(); }
5807	>	}
5808	>
5809	>	@SuppressWarnings("serial") static final class SearchValuesTask<K,V,U>
5810	>	extends BulkAction<K,V,U> {
5811	>	final Fun<? super V, ? extends U> searchFunction;
5812	>	final AtomicReference<U> result;
5813	>	SearchValuesTask
5814	>	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5815	>	SearchValuesTask<K,V,U> nextTask,
5816	>	Fun<? super V, ? extends U> searchFunction,
5817	>	AtomicReference<U> result) {
5818	>	super(m, p, b, nextTask);
5819	>	this.searchFunction = searchFunction; this.result = result;
5820	>	}
5821	>	@SuppressWarnings("unchecked") public final boolean exec() {
5822	>	AtomicReference<U> result = this.result;
5823	>	final Fun<? super V, ? extends U> searchFunction =
5824	>	this.searchFunction;
5825	>	if (searchFunction == null || result == null)
5826	>	return abortOnNullFunction();
5827	>	SearchValuesTask<K,V,U> subtasks = null;
5828	>	try {
5829	>	int b = batch(), c;
5830	>	while (b > 1 && baseIndex != baseLimit && result.get() == null) {
5831	>	do {} while (!casPending(c = pending, c+1));
5832	>	(subtasks = new SearchValuesTask<K,V,U>
5833	>	(map, this, b >>>= 1, subtasks, searchFunction, result)).fork();
5834	>	}
5835	>	Object v; U u;
5836	>	while (result.get() == null && (v = advance()) != null) {
5837	>	if ((u = searchFunction.apply((V)v)) != null) {
5838	>	if (result.compareAndSet(null, u))
5839	>	tryCompleteComputation(null);
5840	>	break;
5841	>	}
5842	>	}
5843	>	} catch (Throwable ex) {
5844	>	return tryCompleteComputation(ex);
5845	>	}
5846	>	tryComplete(subtasks);
5847	>	return false;
5848	>	}
5849	>	public final U getRawResult() { return result.get(); }
5850	>	}
5851	>
5852	>	@SuppressWarnings("serial") static final class SearchEntriesTask<K,V,U>
5853	>	extends BulkAction<K,V,U> {
5854	>	final Fun<Entry<K,V>, ? extends U> searchFunction;
5855	>	final AtomicReference<U> result;
5856	>	SearchEntriesTask
5857	>	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5858	>	SearchEntriesTask<K,V,U> nextTask,
5859	>	Fun<Entry<K,V>, ? extends U> searchFunction,
5860	>	AtomicReference<U> result) {
5861	>	super(m, p, b, nextTask);
5862	>	this.searchFunction = searchFunction; this.result = result;
5863	>	}
5864	>	@SuppressWarnings("unchecked") public final boolean exec() {
5865	>	AtomicReference<U> result = this.result;
5866	>	final Fun<Entry<K,V>, ? extends U> searchFunction =
5867	>	this.searchFunction;
5868	>	if (searchFunction == null || result == null)
5869	>	return abortOnNullFunction();
5870	>	SearchEntriesTask<K,V,U> subtasks = null;
5871	>	try {
5872	>	int b = batch(), c;
5873	>	while (b > 1 && baseIndex != baseLimit && result.get() == null) {
5874	>	do {} while (!casPending(c = pending, c+1));
5875	>	(subtasks = new SearchEntriesTask<K,V,U>
5876	>	(map, this, b >>>= 1, subtasks, searchFunction, result)).fork();
5877	>	}
5878	>	Object v; U u;
5879	>	while (result.get() == null && (v = advance()) != null) {
5880	>	if ((u = searchFunction.apply(entryFor((K)nextKey, (V)v))) != null) {
5881	>	if (result.compareAndSet(null, u))
5882	>	tryCompleteComputation(null);
5883	>	break;
5884	>	}
5885	>	}
5886	>	} catch (Throwable ex) {
5887	>	return tryCompleteComputation(ex);
5888	>	}
5889	>	tryComplete(subtasks);
5890	>	return false;
5891	>	}
5892	>	public final U getRawResult() { return result.get(); }
5893	>	}
5894	>
5895	>	@SuppressWarnings("serial") static final class SearchMappingsTask<K,V,U>
5896	>	extends BulkAction<K,V,U> {
5897	>	final BiFun<? super K, ? super V, ? extends U> searchFunction;
5898	>	final AtomicReference<U> result;
5899	>	SearchMappingsTask
5900	>	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5901	>	SearchMappingsTask<K,V,U> nextTask,
5902	>	BiFun<? super K, ? super V, ? extends U> searchFunction,
5903	>	AtomicReference<U> result) {
5904	>	super(m, p, b, nextTask);
5905	>	this.searchFunction = searchFunction; this.result = result;
5906	>	}
5907	>	@SuppressWarnings("unchecked") public final boolean exec() {
5908	>	AtomicReference<U> result = this.result;
5909	>	final BiFun<? super K, ? super V, ? extends U> searchFunction =
5910	>	this.searchFunction;
5911	>	if (searchFunction == null || result == null)
5912	>	return abortOnNullFunction();
5913	>	SearchMappingsTask<K,V,U> subtasks = null;
5914	>	try {
5915	>	int b = batch(), c;
5916	>	while (b > 1 && baseIndex != baseLimit && result.get() == null) {
5917	>	do {} while (!casPending(c = pending, c+1));
5918	>	(subtasks = new SearchMappingsTask<K,V,U>
5919	>	(map, this, b >>>= 1, subtasks, searchFunction, result)).fork();
5920	>	}
5921	>	Object v; U u;
5922	>	while (result.get() == null && (v = advance()) != null) {
5923	>	if ((u = searchFunction.apply((K)nextKey, (V)v)) != null) {
5924	>	if (result.compareAndSet(null, u))
5925	>	tryCompleteComputation(null);
5926	>	break;
5927	>	}
5928	>	}
5929	>	} catch (Throwable ex) {
5930	>	return tryCompleteComputation(ex);
5931	>	}
5932	>	tryComplete(subtasks);
5933	>	return false;
5934	>	}
5935	>	public final U getRawResult() { return result.get(); }
5936	>	}
5937	>
5938	>	@SuppressWarnings("serial") static final class ReduceKeysTask<K,V>
5939	>	extends BulkTask<K,V,K> {
5940	>	final BiFun<? super K, ? super K, ? extends K> reducer;
5941	>	K result;
5942	>	ReduceKeysTask<K,V> rights, nextRight;
5943	>	ReduceKeysTask
5944	>	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5945	>	ReduceKeysTask<K,V> nextRight,
5946	>	BiFun<? super K, ? super K, ? extends K> reducer) {
5947	>	super(m, p, b); this.nextRight = nextRight;
5948	>	this.reducer = reducer;
5949	>	}
5950	>	@SuppressWarnings("unchecked") public final boolean exec() {
5951	>	final BiFun<? super K, ? super K, ? extends K> reducer =
5952	>	this.reducer;
5953	>	if (reducer == null)
5954	>	return abortOnNullFunction();
5955	>	try {
5956	>	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
5957	>	do {} while (!casPending(c = pending, c+1));
5958	>	(rights = new ReduceKeysTask<K,V>
5959	>	(map, this, b >>>= 1, rights, reducer)).fork();
5960	>	}
5961	>	K r = null;
5962	>	while (advance() != null) {
5963	>	K u = (K)nextKey;
5964	>	r = (r == null) ? u : reducer.apply(r, u);
5965	>	}
5966	>	result = r;
5967	>	for (ReduceKeysTask<K,V> t = this, s;;) {
5968	>	int c; BulkTask<K,V,?> par; K tr, sr;
5969	>	if ((c = t.pending) == 0) {
5970	>	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
5971	>	if ((sr = s.result) != null)
5972	>	t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr);
5973		}
5974	<	table = tab;
5975	<	counter.add(size);
5976	<	sc = n - (n >>> 2);
5974	>	if ((par = t.parent) == null ||
5975	>	!(par instanceof ReduceKeysTask)) {
5976	>	t.quietlyComplete();
5977	>	break;
5978	>	}
5979	>	t = (ReduceKeysTask<K,V>)par;
5980		}
5981	<	} finally {
5982	<	sizeCtl = sc;
5981	>	else if (t.casPending(c, c - 1))
5982	>	break;
5983		}
5984	+	} catch (Throwable ex) {
5985	+	return tryCompleteComputation(ex);
5986		}
5987	<	if (!init) { // Can only happen if unsafely published.
5988	<	while (p != null) {
5989	<	internalPut(p.key, p.val);
5990	<	p = p.next;
5987	>	ReduceKeysTask<K,V> s = rights;
5988	>	if (s != null && !inForkJoinPool()) {
5989	>	do  {
5990	>	if (s.tryUnfork())
5991	>	s.exec();
5992	>	} while ((s = s.nextRight) != null);
5993	>	}
5994	>	return false;
5995	>	}
5996	>	public final K getRawResult() { return result; }
5997	>	}
5998	>
5999	>	@SuppressWarnings("serial") static final class ReduceValuesTask<K,V>
6000	>	extends BulkTask<K,V,V> {
6001	>	final BiFun<? super V, ? super V, ? extends V> reducer;
6002	>	V result;
6003	>	ReduceValuesTask<K,V> rights, nextRight;
6004	>	ReduceValuesTask
6005	>	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6006	>	ReduceValuesTask<K,V> nextRight,
6007	>	BiFun<? super V, ? super V, ? extends V> reducer) {
6008	>	super(m, p, b); this.nextRight = nextRight;
6009	>	this.reducer = reducer;
6010	>	}
6011	>	@SuppressWarnings("unchecked") public final boolean exec() {
6012	>	final BiFun<? super V, ? super V, ? extends V> reducer =
6013	>	this.reducer;
6014	>	if (reducer == null)
6015	>	return abortOnNullFunction();
6016	>	try {
6017	>	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6018	>	do {} while (!casPending(c = pending, c+1));
6019	>	(rights = new ReduceValuesTask<K,V>
6020	>	(map, this, b >>>= 1, rights, reducer)).fork();
6021		}
6022	+	V r = null;
6023	+	Object v;
6024	+	while ((v = advance()) != null) {
6025	+	V u = (V)v;
6026	+	r = (r == null) ? u : reducer.apply(r, u);
6027	+	}
6028	+	result = r;
6029	+	for (ReduceValuesTask<K,V> t = this, s;;) {
6030	+	int c; BulkTask<K,V,?> par; V tr, sr;
6031	+	if ((c = t.pending) == 0) {
6032	+	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6033	+	if ((sr = s.result) != null)
6034	+	t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr);
6035	+	}
6036	+	if ((par = t.parent) == null ||
6037	+	!(par instanceof ReduceValuesTask)) {
6038	+	t.quietlyComplete();
6039	+	break;
6040	+	}
6041	+	t = (ReduceValuesTask<K,V>)par;
6042	+	}
6043	+	else if (t.casPending(c, c - 1))
6044	+	break;
6045	+	}
6046	+	} catch (Throwable ex) {
6047	+	return tryCompleteComputation(ex);
6048	+	}
6049	+	ReduceValuesTask<K,V> s = rights;
6050	+	if (s != null && !inForkJoinPool()) {
6051	+	do  {
6052	+	if (s.tryUnfork())
6053	+	s.exec();
6054	+	} while ((s = s.nextRight) != null);
6055		}
6056	+	return false;
6057		}
6058	+	public final V getRawResult() { return result; }
6059	+	}
6060	+
6061	+	@SuppressWarnings("serial") static final class ReduceEntriesTask<K,V>
6062	+	extends BulkTask<K,V,Map.Entry<K,V>> {
6063	+	final BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer;
6064	+	Map.Entry<K,V> result;
6065	+	ReduceEntriesTask<K,V> rights, nextRight;
6066	+	ReduceEntriesTask
6067	+	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6068	+	ReduceEntriesTask<K,V> nextRight,
6069	+	BiFun<Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
6070	+	super(m, p, b); this.nextRight = nextRight;
6071	+	this.reducer = reducer;
6072	+	}
6073	+	@SuppressWarnings("unchecked") public final boolean exec() {
6074	+	final BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer =
6075	+	this.reducer;
6076	+	if (reducer == null)
6077	+	return abortOnNullFunction();
6078	+	try {
6079	+	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6080	+	do {} while (!casPending(c = pending, c+1));
6081	+	(rights = new ReduceEntriesTask<K,V>
6082	+	(map, this, b >>>= 1, rights, reducer)).fork();
6083	+	}
6084	+	Map.Entry<K,V> r = null;
6085	+	Object v;
6086	+	while ((v = advance()) != null) {
6087	+	Map.Entry<K,V> u = entryFor((K)nextKey, (V)v);
6088	+	r = (r == null) ? u : reducer.apply(r, u);
6089	+	}
6090	+	result = r;
6091	+	for (ReduceEntriesTask<K,V> t = this, s;;) {
6092	+	int c; BulkTask<K,V,?> par; Map.Entry<K,V> tr, sr;
6093	+	if ((c = t.pending) == 0) {
6094	+	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6095	+	if ((sr = s.result) != null)
6096	+	t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr);
6097	+	}
6098	+	if ((par = t.parent) == null ||
6099	+	!(par instanceof ReduceEntriesTask)) {
6100	+	t.quietlyComplete();
6101	+	break;
6102	+	}
6103	+	t = (ReduceEntriesTask<K,V>)par;
6104	+	}
6105	+	else if (t.casPending(c, c - 1))
6106	+	break;
6107	+	}
6108	+	} catch (Throwable ex) {
6109	+	return tryCompleteComputation(ex);
6110	+	}
6111	+	ReduceEntriesTask<K,V> s = rights;
6112	+	if (s != null && !inForkJoinPool()) {
6113	+	do  {
6114	+	if (s.tryUnfork())
6115	+	s.exec();
6116	+	} while ((s = s.nextRight) != null);
6117	+	}
6118	+	return false;
6119	+	}
6120	+	public final Map.Entry<K,V> getRawResult() { return result; }
6121	+	}
6122	+
6123	+	@SuppressWarnings("serial") static final class MapReduceKeysTask<K,V,U>
6124	+	extends BulkTask<K,V,U> {
6125	+	final Fun<? super K, ? extends U> transformer;
6126	+	final BiFun<? super U, ? super U, ? extends U> reducer;
6127	+	U result;
6128	+	MapReduceKeysTask<K,V,U> rights, nextRight;
6129	+	MapReduceKeysTask
6130	+	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6131	+	MapReduceKeysTask<K,V,U> nextRight,
6132	+	Fun<? super K, ? extends U> transformer,
6133	+	BiFun<? super U, ? super U, ? extends U> reducer) {
6134	+	super(m, p, b); this.nextRight = nextRight;
6135	+	this.transformer = transformer;
6136	+	this.reducer = reducer;
6137	+	}
6138	+	@SuppressWarnings("unchecked") public final boolean exec() {
6139	+	final Fun<? super K, ? extends U> transformer =
6140	+	this.transformer;
6141	+	final BiFun<? super U, ? super U, ? extends U> reducer =
6142	+	this.reducer;
6143	+	if (transformer == null || reducer == null)
6144	+	return abortOnNullFunction();
6145	+	try {
6146	+	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6147	+	do {} while (!casPending(c = pending, c+1));
6148	+	(rights = new MapReduceKeysTask<K,V,U>
6149	+	(map, this, b >>>= 1, rights, transformer, reducer)).fork();
6150	+	}
6151	+	U r = null, u;
6152	+	while (advance() != null) {
6153	+	if ((u = transformer.apply((K)nextKey)) != null)
6154	+	r = (r == null) ? u : reducer.apply(r, u);
6155	+	}
6156	+	result = r;
6157	+	for (MapReduceKeysTask<K,V,U> t = this, s;;) {
6158	+	int c; BulkTask<K,V,?> par; U tr, sr;
6159	+	if ((c = t.pending) == 0) {
6160	+	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6161	+	if ((sr = s.result) != null)
6162	+	t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr);
6163	+	}
6164	+	if ((par = t.parent) == null ||
6165	+	!(par instanceof MapReduceKeysTask)) {
6166	+	t.quietlyComplete();
6167	+	break;
6168	+	}
6169	+	t = (MapReduceKeysTask<K,V,U>)par;
6170	+	}
6171	+	else if (t.casPending(c, c - 1))
6172	+	break;
6173	+	}
6174	+	} catch (Throwable ex) {
6175	+	return tryCompleteComputation(ex);
6176	+	}
6177	+	MapReduceKeysTask<K,V,U> s = rights;
6178	+	if (s != null && !inForkJoinPool()) {
6179	+	do  {
6180	+	if (s.tryUnfork())
6181	+	s.exec();
6182	+	} while ((s = s.nextRight) != null);
6183	+	}
6184	+	return false;
6185	+	}
6186	+	public final U getRawResult() { return result; }
6187	+	}
6188	+
6189	+	@SuppressWarnings("serial") static final class MapReduceValuesTask<K,V,U>
6190	+	extends BulkTask<K,V,U> {
6191	+	final Fun<? super V, ? extends U> transformer;
6192	+	final BiFun<? super U, ? super U, ? extends U> reducer;
6193	+	U result;
6194	+	MapReduceValuesTask<K,V,U> rights, nextRight;
6195	+	MapReduceValuesTask
6196	+	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6197	+	MapReduceValuesTask<K,V,U> nextRight,
6198	+	Fun<? super V, ? extends U> transformer,
6199	+	BiFun<? super U, ? super U, ? extends U> reducer) {
6200	+	super(m, p, b); this.nextRight = nextRight;
6201	+	this.transformer = transformer;
6202	+	this.reducer = reducer;
6203	+	}
6204	+	@SuppressWarnings("unchecked") public final boolean exec() {
6205	+	final Fun<? super V, ? extends U> transformer =
6206	+	this.transformer;
6207	+	final BiFun<? super U, ? super U, ? extends U> reducer =
6208	+	this.reducer;
6209	+	if (transformer == null || reducer == null)
6210	+	return abortOnNullFunction();
6211	+	try {
6212	+	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6213	+	do {} while (!casPending(c = pending, c+1));
6214	+	(rights = new MapReduceValuesTask<K,V,U>
6215	+	(map, this, b >>>= 1, rights, transformer, reducer)).fork();
6216	+	}
6217	+	U r = null, u;
6218	+	Object v;
6219	+	while ((v = advance()) != null) {
6220	+	if ((u = transformer.apply((V)v)) != null)
6221	+	r = (r == null) ? u : reducer.apply(r, u);
6222	+	}
6223	+	result = r;
6224	+	for (MapReduceValuesTask<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 MapReduceValuesTask)) {
6233	+	t.quietlyComplete();
6234	+	break;
6235	+	}
6236	+	t = (MapReduceValuesTask<K,V,U>)par;
6237	+	}
6238	+	else if (t.casPending(c, c - 1))
6239	+	break;
6240	+	}
6241	+	} catch (Throwable ex) {
6242	+	return tryCompleteComputation(ex);
6243	+	}
6244	+	MapReduceValuesTask<K,V,U> s = rights;
6245	+	if (s != null && !inForkJoinPool()) {
6246	+	do  {
6247	+	if (s.tryUnfork())
6248	+	s.exec();
6249	+	} while ((s = s.nextRight) != null);
6250	+	}
6251	+	return false;
6252	+	}
6253	+	public final U getRawResult() { return result; }
6254	+	}
6255	+
6256	+	@SuppressWarnings("serial") static final class MapReduceEntriesTask<K,V,U>
6257	+	extends BulkTask<K,V,U> {
6258	+	final Fun<Map.Entry<K,V>, ? extends U> transformer;
6259	+	final BiFun<? super U, ? super U, ? extends U> reducer;
6260	+	U result;
6261	+	MapReduceEntriesTask<K,V,U> rights, nextRight;
6262	+	MapReduceEntriesTask
6263	+	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6264	+	MapReduceEntriesTask<K,V,U> nextRight,
6265	+	Fun<Map.Entry<K,V>, ? extends U> transformer,
6266	+	BiFun<? super U, ? super U, ? extends U> reducer) {
6267	+	super(m, p, b); this.nextRight = nextRight;
6268	+	this.transformer = transformer;
6269	+	this.reducer = reducer;
6270	+	}
6271	+	@SuppressWarnings("unchecked") public final boolean exec() {
6272	+	final Fun<Map.Entry<K,V>, ? extends U> transformer =
6273	+	this.transformer;
6274	+	final BiFun<? super U, ? super U, ? extends U> reducer =
6275	+	this.reducer;
6276	+	if (transformer == null || reducer == null)
6277	+	return abortOnNullFunction();
6278	+	try {
6279	+	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6280	+	do {} while (!casPending(c = pending, c+1));
6281	+	(rights = new MapReduceEntriesTask<K,V,U>
6282	+	(map, this, b >>>= 1, rights, transformer, reducer)).fork();
6283	+	}
6284	+	U r = null, u;
6285	+	Object v;
6286	+	while ((v = advance()) != null) {
6287	+	if ((u = transformer.apply(entryFor((K)nextKey, (V)v))) != null)
6288	+	r = (r == null) ? u : reducer.apply(r, u);
6289	+	}
6290	+	result = r;
6291	+	for (MapReduceEntriesTask<K,V,U> t = this, s;;) {
6292	+	int c; BulkTask<K,V,?> par; U tr, sr;
6293	+	if ((c = t.pending) == 0) {
6294	+	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6295	+	if ((sr = s.result) != null)
6296	+	t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr);
6297	+	}
6298	+	if ((par = t.parent) == null ||
6299	+	!(par instanceof MapReduceEntriesTask)) {
6300	+	t.quietlyComplete();
6301	+	break;
6302	+	}
6303	+	t = (MapReduceEntriesTask<K,V,U>)par;
6304	+	}
6305	+	else if (t.casPending(c, c - 1))
6306	+	break;
6307	+	}
6308	+	} catch (Throwable ex) {
6309	+	return tryCompleteComputation(ex);
6310	+	}
6311	+	MapReduceEntriesTask<K,V,U> s = rights;
6312	+	if (s != null && !inForkJoinPool()) {
6313	+	do  {
6314	+	if (s.tryUnfork())
6315	+	s.exec();
6316	+	} while ((s = s.nextRight) != null);
6317	+	}
6318	+	return false;
6319	+	}
6320	+	public final U getRawResult() { return result; }
6321	+	}
6322	+
6323	+	@SuppressWarnings("serial") static final class MapReduceMappingsTask<K,V,U>
6324	+	extends BulkTask<K,V,U> {
6325	+	final BiFun<? super K, ? super V, ? extends U> transformer;
6326	+	final BiFun<? super U, ? super U, ? extends U> reducer;
6327	+	U result;
6328	+	MapReduceMappingsTask<K,V,U> rights, nextRight;
6329	+	MapReduceMappingsTask
6330	+	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6331	+	MapReduceMappingsTask<K,V,U> nextRight,
6332	+	BiFun<? super K, ? super V, ? extends U> transformer,
6333	+	BiFun<? super U, ? super U, ? extends U> reducer) {
6334	+	super(m, p, b); this.nextRight = nextRight;
6335	+	this.transformer = transformer;
6336	+	this.reducer = reducer;
6337	+	}
6338	+	@SuppressWarnings("unchecked") public final boolean exec() {
6339	+	final BiFun<? super K, ? super V, ? extends U> transformer =
6340	+	this.transformer;
6341	+	final BiFun<? super U, ? super U, ? extends U> reducer =
6342	+	this.reducer;
6343	+	if (transformer == null || reducer == null)
6344	+	return abortOnNullFunction();
6345	+	try {
6346	+	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6347	+	do {} while (!casPending(c = pending, c+1));
6348	+	(rights = new MapReduceMappingsTask<K,V,U>
6349	+	(map, this, b >>>= 1, rights, transformer, reducer)).fork();
6350	+	}
6351	+	U r = null, u;
6352	+	Object v;
6353	+	while ((v = advance()) != null) {
6354	+	if ((u = transformer.apply((K)nextKey, (V)v)) != null)
6355	+	r = (r == null) ? u : reducer.apply(r, u);
6356	+	}
6357	+	result = r;
6358	+	for (MapReduceMappingsTask<K,V,U> t = this, s;;) {
6359	+	int c; BulkTask<K,V,?> par; U tr, sr;
6360	+	if ((c = t.pending) == 0) {
6361	+	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6362	+	if ((sr = s.result) != null)
6363	+	t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr);
6364	+	}
6365	+	if ((par = t.parent) == null ||
6366	+	!(par instanceof MapReduceMappingsTask)) {
6367	+	t.quietlyComplete();
6368	+	break;
6369	+	}
6370	+	t = (MapReduceMappingsTask<K,V,U>)par;
6371	+	}
6372	+	else if (t.casPending(c, c - 1))
6373	+	break;
6374	+	}
6375	+	} catch (Throwable ex) {
6376	+	return tryCompleteComputation(ex);
6377	+	}
6378	+	MapReduceMappingsTask<K,V,U> s = rights;
6379	+	if (s != null && !inForkJoinPool()) {
6380	+	do  {
6381	+	if (s.tryUnfork())
6382	+	s.exec();
6383	+	} while ((s = s.nextRight) != null);
6384	+	}
6385	+	return false;
6386	+	}
6387	+	public final U getRawResult() { return result; }
6388	+	}
6389	+
6390	+	@SuppressWarnings("serial") static final class MapReduceKeysToDoubleTask<K,V>
6391	+	extends BulkTask<K,V,Double> {
6392	+	final ObjectToDouble<? super K> transformer;
6393	+	final DoubleByDoubleToDouble reducer;
6394	+	final double basis;
6395	+	double result;
6396	+	MapReduceKeysToDoubleTask<K,V> rights, nextRight;
6397	+	MapReduceKeysToDoubleTask
6398	+	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6399	+	MapReduceKeysToDoubleTask<K,V> nextRight,
6400	+	ObjectToDouble<? super K> transformer,
6401	+	double basis,
6402	+	DoubleByDoubleToDouble reducer) {
6403	+	super(m, p, b); this.nextRight = nextRight;
6404	+	this.transformer = transformer;
6405	+	this.basis = basis; this.reducer = reducer;
6406	+	}
6407	+	@SuppressWarnings("unchecked") public final boolean exec() {
6408	+	final ObjectToDouble<? super K> transformer =
6409	+	this.transformer;
6410	+	final DoubleByDoubleToDouble reducer = this.reducer;
6411	+	if (transformer == null || reducer == null)
6412	+	return abortOnNullFunction();
6413	+	try {
6414	+	final double id = this.basis;
6415	+	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6416	+	do {} while (!casPending(c = pending, c+1));
6417	+	(rights = new MapReduceKeysToDoubleTask<K,V>
6418	+	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6419	+	}
6420	+	double r = id;
6421	+	while (advance() != null)
6422	+	r = reducer.apply(r, transformer.apply((K)nextKey));
6423	+	result = r;
6424	+	for (MapReduceKeysToDoubleTask<K,V> t = this, s;;) {
6425	+	int c; BulkTask<K,V,?> par;
6426	+	if ((c = t.pending) == 0) {
6427	+	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6428	+	t.result = reducer.apply(t.result, s.result);
6429	+	}
6430	+	if ((par = t.parent) == null ||
6431	+	!(par instanceof MapReduceKeysToDoubleTask)) {
6432	+	t.quietlyComplete();
6433	+	break;
6434	+	}
6435	+	t = (MapReduceKeysToDoubleTask<K,V>)par;
6436	+	}
6437	+	else if (t.casPending(c, c - 1))
6438	+	break;
6439	+	}
6440	+	} catch (Throwable ex) {
6441	+	return tryCompleteComputation(ex);
6442	+	}
6443	+	MapReduceKeysToDoubleTask<K,V> s = rights;
6444	+	if (s != null && !inForkJoinPool()) {
6445	+	do  {
6446	+	if (s.tryUnfork())
6447	+	s.exec();
6448	+	} while ((s = s.nextRight) != null);
6449	+	}
6450	+	return false;
6451	+	}
6452	+	public final Double getRawResult() { return result; }
6453	+	}
6454	+
6455	+	@SuppressWarnings("serial") static final class MapReduceValuesToDoubleTask<K,V>
6456	+	extends BulkTask<K,V,Double> {
6457	+	final ObjectToDouble<? super V> transformer;
6458	+	final DoubleByDoubleToDouble reducer;
6459	+	final double basis;
6460	+	double result;
6461	+	MapReduceValuesToDoubleTask<K,V> rights, nextRight;
6462	+	MapReduceValuesToDoubleTask
6463	+	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6464	+	MapReduceValuesToDoubleTask<K,V> nextRight,
6465	+	ObjectToDouble<? super V> transformer,
6466	+	double basis,
6467	+	DoubleByDoubleToDouble reducer) {
6468	+	super(m, p, b); this.nextRight = nextRight;
6469	+	this.transformer = transformer;
6470	+	this.basis = basis; this.reducer = reducer;
6471	+	}
6472	+	@SuppressWarnings("unchecked") public final boolean exec() {
6473	+	final ObjectToDouble<? super V> transformer =
6474	+	this.transformer;
6475	+	final DoubleByDoubleToDouble reducer = this.reducer;
6476	+	if (transformer == null || reducer == null)
6477	+	return abortOnNullFunction();
6478	+	try {
6479	+	final double id = this.basis;
6480	+	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6481	+	do {} while (!casPending(c = pending, c+1));
6482	+	(rights = new MapReduceValuesToDoubleTask<K,V>
6483	+	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6484	+	}
6485	+	double r = id;
6486	+	Object v;
6487	+	while ((v = advance()) != null)
6488	+	r = reducer.apply(r, transformer.apply((V)v));
6489	+	result = r;
6490	+	for (MapReduceValuesToDoubleTask<K,V> t = this, s;;) {
6491	+	int c; BulkTask<K,V,?> par;
6492	+	if ((c = t.pending) == 0) {
6493	+	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6494	+	t.result = reducer.apply(t.result, s.result);
6495	+	}
6496	+	if ((par = t.parent) == null ||
6497	+	!(par instanceof MapReduceValuesToDoubleTask)) {
6498	+	t.quietlyComplete();
6499	+	break;
6500	+	}
6501	+	t = (MapReduceValuesToDoubleTask<K,V>)par;
6502	+	}
6503	+	else if (t.casPending(c, c - 1))
6504	+	break;
6505	+	}
6506	+	} catch (Throwable ex) {
6507	+	return tryCompleteComputation(ex);
6508	+	}
6509	+	MapReduceValuesToDoubleTask<K,V> s = rights;
6510	+	if (s != null && !inForkJoinPool()) {
6511	+	do  {
6512	+	if (s.tryUnfork())
6513	+	s.exec();
6514	+	} while ((s = s.nextRight) != null);
6515	+	}
6516	+	return false;
6517	+	}
6518	+	public final Double getRawResult() { return result; }
6519	+	}
6520	+
6521	+	@SuppressWarnings("serial") static final class MapReduceEntriesToDoubleTask<K,V>
6522	+	extends BulkTask<K,V,Double> {
6523	+	final ObjectToDouble<Map.Entry<K,V>> transformer;
6524	+	final DoubleByDoubleToDouble reducer;
6525	+	final double basis;
6526	+	double result;
6527	+	MapReduceEntriesToDoubleTask<K,V> rights, nextRight;
6528	+	MapReduceEntriesToDoubleTask
6529	+	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6530	+	MapReduceEntriesToDoubleTask<K,V> nextRight,
6531	+	ObjectToDouble<Map.Entry<K,V>> transformer,
6532	+	double basis,
6533	+	DoubleByDoubleToDouble reducer) {
6534	+	super(m, p, b); this.nextRight = nextRight;
6535	+	this.transformer = transformer;
6536	+	this.basis = basis; this.reducer = reducer;
6537	+	}
6538	+	@SuppressWarnings("unchecked") public final boolean exec() {
6539	+	final ObjectToDouble<Map.Entry<K,V>> transformer =
6540	+	this.transformer;
6541	+	final DoubleByDoubleToDouble reducer = this.reducer;
6542	+	if (transformer == null || reducer == null)
6543	+	return abortOnNullFunction();
6544	+	try {
6545	+	final double id = this.basis;
6546	+	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6547	+	do {} while (!casPending(c = pending, c+1));
6548	+	(rights = new MapReduceEntriesToDoubleTask<K,V>
6549	+	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6550	+	}
6551	+	double r = id;
6552	+	Object v;
6553	+	while ((v = advance()) != null)
6554	+	r = reducer.apply(r, transformer.apply(entryFor((K)nextKey, (V)v)));
6555	+	result = r;
6556	+	for (MapReduceEntriesToDoubleTask<K,V> t = this, s;;) {
6557	+	int c; BulkTask<K,V,?> par;
6558	+	if ((c = t.pending) == 0) {
6559	+	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6560	+	t.result = reducer.apply(t.result, s.result);
6561	+	}
6562	+	if ((par = t.parent) == null ||
6563	+	!(par instanceof MapReduceEntriesToDoubleTask)) {
6564	+	t.quietlyComplete();
6565	+	break;
6566	+	}
6567	+	t = (MapReduceEntriesToDoubleTask<K,V>)par;
6568	+	}
6569	+	else if (t.casPending(c, c - 1))
6570	+	break;
6571	+	}
6572	+	} catch (Throwable ex) {
6573	+	return tryCompleteComputation(ex);
6574	+	}
6575	+	MapReduceEntriesToDoubleTask<K,V> s = rights;
6576	+	if (s != null && !inForkJoinPool()) {
6577	+	do  {
6578	+	if (s.tryUnfork())
6579	+	s.exec();
6580	+	} while ((s = s.nextRight) != null);
6581	+	}
6582	+	return false;
6583	+	}
6584	+	public final Double getRawResult() { return result; }
6585	+	}
6586	+
6587	+	@SuppressWarnings("serial") static final class MapReduceMappingsToDoubleTask<K,V>
6588	+	extends BulkTask<K,V,Double> {
6589	+	final ObjectByObjectToDouble<? super K, ? super V> transformer;
6590	+	final DoubleByDoubleToDouble reducer;
6591	+	final double basis;
6592	+	double result;
6593	+	MapReduceMappingsToDoubleTask<K,V> rights, nextRight;
6594	+	MapReduceMappingsToDoubleTask
6595	+	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6596	+	MapReduceMappingsToDoubleTask<K,V> nextRight,
6597	+	ObjectByObjectToDouble<? super K, ? super V> transformer,
6598	+	double basis,
6599	+	DoubleByDoubleToDouble reducer) {
6600	+	super(m, p, b); this.nextRight = nextRight;
6601	+	this.transformer = transformer;
6602	+	this.basis = basis; this.reducer = reducer;
6603	+	}
6604	+	@SuppressWarnings("unchecked") public final boolean exec() {
6605	+	final ObjectByObjectToDouble<? super K, ? super V> transformer =
6606	+	this.transformer;
6607	+	final DoubleByDoubleToDouble reducer = this.reducer;
6608	+	if (transformer == null || reducer == null)
6609	+	return abortOnNullFunction();
6610	+	try {
6611	+	final double id = this.basis;
6612	+	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6613	+	do {} while (!casPending(c = pending, c+1));
6614	+	(rights = new MapReduceMappingsToDoubleTask<K,V>
6615	+	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6616	+	}
6617	+	double r = id;
6618	+	Object v;
6619	+	while ((v = advance()) != null)
6620	+	r = reducer.apply(r, transformer.apply((K)nextKey, (V)v));
6621	+	result = r;
6622	+	for (MapReduceMappingsToDoubleTask<K,V> t = this, s;;) {
6623	+	int c; BulkTask<K,V,?> par;
6624	+	if ((c = t.pending) == 0) {
6625	+	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6626	+	t.result = reducer.apply(t.result, s.result);
6627	+	}
6628	+	if ((par = t.parent) == null ||
6629	+	!(par instanceof MapReduceMappingsToDoubleTask)) {
6630	+	t.quietlyComplete();
6631	+	break;
6632	+	}
6633	+	t = (MapReduceMappingsToDoubleTask<K,V>)par;
6634	+	}
6635	+	else if (t.casPending(c, c - 1))
6636	+	break;
6637	+	}
6638	+	} catch (Throwable ex) {
6639	+	return tryCompleteComputation(ex);
6640	+	}
6641	+	MapReduceMappingsToDoubleTask<K,V> s = rights;
6642	+	if (s != null && !inForkJoinPool()) {
6643	+	do  {
6644	+	if (s.tryUnfork())
6645	+	s.exec();
6646	+	} while ((s = s.nextRight) != null);
6647	+	}
6648	+	return false;
6649	+	}
6650	+	public final Double getRawResult() { return result; }
6651	+	}
6652	+
6653	+	@SuppressWarnings("serial") static final class MapReduceKeysToLongTask<K,V>
6654	+	extends BulkTask<K,V,Long> {
6655	+	final ObjectToLong<? super K> transformer;
6656	+	final LongByLongToLong reducer;
6657	+	final long basis;
6658	+	long result;
6659	+	MapReduceKeysToLongTask<K,V> rights, nextRight;
6660	+	MapReduceKeysToLongTask
6661	+	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6662	+	MapReduceKeysToLongTask<K,V> nextRight,
6663	+	ObjectToLong<? super K> transformer,
6664	+	long basis,
6665	+	LongByLongToLong reducer) {
6666	+	super(m, p, b); this.nextRight = nextRight;
6667	+	this.transformer = transformer;
6668	+	this.basis = basis; this.reducer = reducer;
6669	+	}
6670	+	@SuppressWarnings("unchecked") public final boolean exec() {
6671	+	final ObjectToLong<? super K> transformer =
6672	+	this.transformer;
6673	+	final LongByLongToLong reducer = this.reducer;
6674	+	if (transformer == null || reducer == null)
6675	+	return abortOnNullFunction();
6676	+	try {
6677	+	final long id = this.basis;
6678	+	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6679	+	do {} while (!casPending(c = pending, c+1));
6680	+	(rights = new MapReduceKeysToLongTask<K,V>
6681	+	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6682	+	}
6683	+	long r = id;
6684	+	while (advance() != null)
6685	+	r = reducer.apply(r, transformer.apply((K)nextKey));
6686	+	result = r;
6687	+	for (MapReduceKeysToLongTask<K,V> t = this, s;;) {
6688	+	int c; BulkTask<K,V,?> par;
6689	+	if ((c = t.pending) == 0) {
6690	+	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6691	+	t.result = reducer.apply(t.result, s.result);
6692	+	}
6693	+	if ((par = t.parent) == null ||
6694	+	!(par instanceof MapReduceKeysToLongTask)) {
6695	+	t.quietlyComplete();
6696	+	break;
6697	+	}
6698	+	t = (MapReduceKeysToLongTask<K,V>)par;
6699	+	}
6700	+	else if (t.casPending(c, c - 1))
6701	+	break;
6702	+	}
6703	+	} catch (Throwable ex) {
6704	+	return tryCompleteComputation(ex);
6705	+	}
6706	+	MapReduceKeysToLongTask<K,V> s = rights;
6707	+	if (s != null && !inForkJoinPool()) {
6708	+	do  {
6709	+	if (s.tryUnfork())
6710	+	s.exec();
6711	+	} while ((s = s.nextRight) != null);
6712	+	}
6713	+	return false;
6714	+	}
6715	+	public final Long getRawResult() { return result; }
6716	+	}
6717	+
6718	+	@SuppressWarnings("serial") static final class MapReduceValuesToLongTask<K,V>
6719	+	extends BulkTask<K,V,Long> {
6720	+	final ObjectToLong<? super V> transformer;
6721	+	final LongByLongToLong reducer;
6722	+	final long basis;
6723	+	long result;
6724	+	MapReduceValuesToLongTask<K,V> rights, nextRight;
6725	+	MapReduceValuesToLongTask
6726	+	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6727	+	MapReduceValuesToLongTask<K,V> nextRight,
6728	+	ObjectToLong<? super V> transformer,
6729	+	long basis,
6730	+	LongByLongToLong reducer) {
6731	+	super(m, p, b); this.nextRight = nextRight;
6732	+	this.transformer = transformer;
6733	+	this.basis = basis; this.reducer = reducer;
6734	+	}
6735	+	@SuppressWarnings("unchecked") public final boolean exec() {
6736	+	final ObjectToLong<? super V> transformer =
6737	+	this.transformer;
6738	+	final LongByLongToLong reducer = this.reducer;
6739	+	if (transformer == null || reducer == null)
6740	+	return abortOnNullFunction();
6741	+	try {
6742	+	final long id = this.basis;
6743	+	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6744	+	do {} while (!casPending(c = pending, c+1));
6745	+	(rights = new MapReduceValuesToLongTask<K,V>
6746	+	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6747	+	}
6748	+	long r = id;
6749	+	Object v;
6750	+	while ((v = advance()) != null)
6751	+	r = reducer.apply(r, transformer.apply((V)v));
6752	+	result = r;
6753	+	for (MapReduceValuesToLongTask<K,V> t = this, s;;) {
6754	+	int c; BulkTask<K,V,?> par;
6755	+	if ((c = t.pending) == 0) {
6756	+	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6757	+	t.result = reducer.apply(t.result, s.result);
6758	+	}
6759	+	if ((par = t.parent) == null ||
6760	+	!(par instanceof MapReduceValuesToLongTask)) {
6761	+	t.quietlyComplete();
6762	+	break;
6763	+	}
6764	+	t = (MapReduceValuesToLongTask<K,V>)par;
6765	+	}
6766	+	else if (t.casPending(c, c - 1))
6767	+	break;
6768	+	}
6769	+	} catch (Throwable ex) {
6770	+	return tryCompleteComputation(ex);
6771	+	}
6772	+	MapReduceValuesToLongTask<K,V> s = rights;
6773	+	if (s != null && !inForkJoinPool()) {
6774	+	do  {
6775	+	if (s.tryUnfork())
6776	+	s.exec();
6777	+	} while ((s = s.nextRight) != null);
6778	+	}
6779	+	return false;
6780	+	}
6781	+	public final Long getRawResult() { return result; }
6782	+	}
6783	+
6784	+	@SuppressWarnings("serial") static final class MapReduceEntriesToLongTask<K,V>
6785	+	extends BulkTask<K,V,Long> {
6786	+	final ObjectToLong<Map.Entry<K,V>> transformer;
6787	+	final LongByLongToLong reducer;
6788	+	final long basis;
6789	+	long result;
6790	+	MapReduceEntriesToLongTask<K,V> rights, nextRight;
6791	+	MapReduceEntriesToLongTask
6792	+	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6793	+	MapReduceEntriesToLongTask<K,V> nextRight,
6794	+	ObjectToLong<Map.Entry<K,V>> transformer,
6795	+	long basis,
6796	+	LongByLongToLong reducer) {
6797	+	super(m, p, b); this.nextRight = nextRight;
6798	+	this.transformer = transformer;
6799	+	this.basis = basis; this.reducer = reducer;
6800	+	}
6801	+	@SuppressWarnings("unchecked") public final boolean exec() {
6802	+	final ObjectToLong<Map.Entry<K,V>> transformer =
6803	+	this.transformer;
6804	+	final LongByLongToLong reducer = this.reducer;
6805	+	if (transformer == null || reducer == null)
6806	+	return abortOnNullFunction();
6807	+	try {
6808	+	final long id = this.basis;
6809	+	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6810	+	do {} while (!casPending(c = pending, c+1));
6811	+	(rights = new MapReduceEntriesToLongTask<K,V>
6812	+	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6813	+	}
6814	+	long r = id;
6815	+	Object v;
6816	+	while ((v = advance()) != null)
6817	+	r = reducer.apply(r, transformer.apply(entryFor((K)nextKey, (V)v)));
6818	+	result = r;
6819	+	for (MapReduceEntriesToLongTask<K,V> t = this, s;;) {
6820	+	int c; BulkTask<K,V,?> par;
6821	+	if ((c = t.pending) == 0) {
6822	+	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6823	+	t.result = reducer.apply(t.result, s.result);
6824	+	}
6825	+	if ((par = t.parent) == null ||
6826	+	!(par instanceof MapReduceEntriesToLongTask)) {
6827	+	t.quietlyComplete();
6828	+	break;
6829	+	}
6830	+	t = (MapReduceEntriesToLongTask<K,V>)par;
6831	+	}
6832	+	else if (t.casPending(c, c - 1))
6833	+	break;
6834	+	}
6835	+	} catch (Throwable ex) {
6836	+	return tryCompleteComputation(ex);
6837	+	}
6838	+	MapReduceEntriesToLongTask<K,V> s = rights;
6839	+	if (s != null && !inForkJoinPool()) {
6840	+	do  {
6841	+	if (s.tryUnfork())
6842	+	s.exec();
6843	+	} while ((s = s.nextRight) != null);
6844	+	}
6845	+	return false;
6846	+	}
6847	+	public final Long getRawResult() { return result; }
6848	+	}
6849	+
6850	+	@SuppressWarnings("serial") static final class MapReduceMappingsToLongTask<K,V>
6851	+	extends BulkTask<K,V,Long> {
6852	+	final ObjectByObjectToLong<? super K, ? super V> transformer;
6853	+	final LongByLongToLong reducer;
6854	+	final long basis;
6855	+	long result;
6856	+	MapReduceMappingsToLongTask<K,V> rights, nextRight;
6857	+	MapReduceMappingsToLongTask
6858	+	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6859	+	MapReduceMappingsToLongTask<K,V> nextRight,
6860	+	ObjectByObjectToLong<? super K, ? super V> transformer,
6861	+	long basis,
6862	+	LongByLongToLong reducer) {
6863	+	super(m, p, b); this.nextRight = nextRight;
6864	+	this.transformer = transformer;
6865	+	this.basis = basis; this.reducer = reducer;
6866	+	}
6867	+	@SuppressWarnings("unchecked") public final boolean exec() {
6868	+	final ObjectByObjectToLong<? super K, ? super V> transformer =
6869	+	this.transformer;
6870	+	final LongByLongToLong reducer = this.reducer;
6871	+	if (transformer == null || reducer == null)
6872	+	return abortOnNullFunction();
6873	+	try {
6874	+	final long id = this.basis;
6875	+	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6876	+	do {} while (!casPending(c = pending, c+1));
6877	+	(rights = new MapReduceMappingsToLongTask<K,V>
6878	+	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6879	+	}
6880	+	long r = id;
6881	+	Object v;
6882	+	while ((v = advance()) != null)
6883	+	r = reducer.apply(r, transformer.apply((K)nextKey, (V)v));
6884	+	result = r;
6885	+	for (MapReduceMappingsToLongTask<K,V> t = this, s;;) {
6886	+	int c; BulkTask<K,V,?> par;
6887	+	if ((c = t.pending) == 0) {
6888	+	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6889	+	t.result = reducer.apply(t.result, s.result);
6890	+	}
6891	+	if ((par = t.parent) == null ||
6892	+	!(par instanceof MapReduceMappingsToLongTask)) {
6893	+	t.quietlyComplete();
6894	+	break;
6895	+	}
6896	+	t = (MapReduceMappingsToLongTask<K,V>)par;
6897	+	}
6898	+	else if (t.casPending(c, c - 1))
6899	+	break;
6900	+	}
6901	+	} catch (Throwable ex) {
6902	+	return tryCompleteComputation(ex);
6903	+	}
6904	+	MapReduceMappingsToLongTask<K,V> s = rights;
6905	+	if (s != null && !inForkJoinPool()) {
6906	+	do  {
6907	+	if (s.tryUnfork())
6908	+	s.exec();
6909	+	} while ((s = s.nextRight) != null);
6910	+	}
6911	+	return false;
6912	+	}
6913	+	public final Long getRawResult() { return result; }
6914	+	}
6915	+
6916	+	@SuppressWarnings("serial") static final class MapReduceKeysToIntTask<K,V>
6917	+	extends BulkTask<K,V,Integer> {
6918	+	final ObjectToInt<? super K> transformer;
6919	+	final IntByIntToInt reducer;
6920	+	final int basis;
6921	+	int result;
6922	+	MapReduceKeysToIntTask<K,V> rights, nextRight;
6923	+	MapReduceKeysToIntTask
6924	+	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6925	+	MapReduceKeysToIntTask<K,V> nextRight,
6926	+	ObjectToInt<? super K> transformer,
6927	+	int basis,
6928	+	IntByIntToInt reducer) {
6929	+	super(m, p, b); this.nextRight = nextRight;
6930	+	this.transformer = transformer;
6931	+	this.basis = basis; this.reducer = reducer;
6932	+	}
6933	+	@SuppressWarnings("unchecked") public final boolean exec() {
6934	+	final ObjectToInt<? super K> transformer =
6935	+	this.transformer;
6936	+	final IntByIntToInt reducer = this.reducer;
6937	+	if (transformer == null || reducer == null)
6938	+	return abortOnNullFunction();
6939	+	try {
6940	+	final int id = this.basis;
6941	+	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6942	+	do {} while (!casPending(c = pending, c+1));
6943	+	(rights = new MapReduceKeysToIntTask<K,V>
6944	+	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6945	+	}
6946	+	int r = id;
6947	+	while (advance() != null)
6948	+	r = reducer.apply(r, transformer.apply((K)nextKey));
6949	+	result = r;
6950	+	for (MapReduceKeysToIntTask<K,V> t = this, s;;) {
6951	+	int c; BulkTask<K,V,?> par;
6952	+	if ((c = t.pending) == 0) {
6953	+	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6954	+	t.result = reducer.apply(t.result, s.result);
6955	+	}
6956	+	if ((par = t.parent) == null ||
6957	+	!(par instanceof MapReduceKeysToIntTask)) {
6958	+	t.quietlyComplete();
6959	+	break;
6960	+	}
6961	+	t = (MapReduceKeysToIntTask<K,V>)par;
6962	+	}
6963	+	else if (t.casPending(c, c - 1))
6964	+	break;
6965	+	}
6966	+	} catch (Throwable ex) {
6967	+	return tryCompleteComputation(ex);
6968	+	}
6969	+	MapReduceKeysToIntTask<K,V> s = rights;
6970	+	if (s != null && !inForkJoinPool()) {
6971	+	do  {
6972	+	if (s.tryUnfork())
6973	+	s.exec();
6974	+	} while ((s = s.nextRight) != null);
6975	+	}
6976	+	return false;
6977	+	}
6978	+	public final Integer getRawResult() { return result; }
6979	+	}
6980	+
6981	+	@SuppressWarnings("serial") static final class MapReduceValuesToIntTask<K,V>
6982	+	extends BulkTask<K,V,Integer> {
6983	+	final ObjectToInt<? super V> transformer;
6984	+	final IntByIntToInt reducer;
6985	+	final int basis;
6986	+	int result;
6987	+	MapReduceValuesToIntTask<K,V> rights, nextRight;
6988	+	MapReduceValuesToIntTask
6989	+	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6990	+	MapReduceValuesToIntTask<K,V> nextRight,
6991	+	ObjectToInt<? super V> transformer,
6992	+	int basis,
6993	+	IntByIntToInt reducer) {
6994	+	super(m, p, b); this.nextRight = nextRight;
6995	+	this.transformer = transformer;
6996	+	this.basis = basis; this.reducer = reducer;
6997	+	}
6998	+	@SuppressWarnings("unchecked") public final boolean exec() {
6999	+	final ObjectToInt<? super V> transformer =
7000	+	this.transformer;
7001	+	final IntByIntToInt reducer = this.reducer;
7002	+	if (transformer == null || reducer == null)
7003	+	return abortOnNullFunction();
7004	+	try {
7005	+	final int id = this.basis;
7006	+	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
7007	+	do {} while (!casPending(c = pending, c+1));
7008	+	(rights = new MapReduceValuesToIntTask<K,V>
7009	+	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
7010	+	}
7011	+	int r = id;
7012	+	Object v;
7013	+	while ((v = advance()) != null)
7014	+	r = reducer.apply(r, transformer.apply((V)v));
7015	+	result = r;
7016	+	for (MapReduceValuesToIntTask<K,V> t = this, s;;) {
7017	+	int c; BulkTask<K,V,?> par;
7018	+	if ((c = t.pending) == 0) {
7019	+	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
7020	+	t.result = reducer.apply(t.result, s.result);
7021	+	}
7022	+	if ((par = t.parent) == null ||
7023	+	!(par instanceof MapReduceValuesToIntTask)) {
7024	+	t.quietlyComplete();
7025	+	break;
7026	+	}
7027	+	t = (MapReduceValuesToIntTask<K,V>)par;
7028	+	}
7029	+	else if (t.casPending(c, c - 1))
7030	+	break;
7031	+	}
7032	+	} catch (Throwable ex) {
7033	+	return tryCompleteComputation(ex);
7034	+	}
7035	+	MapReduceValuesToIntTask<K,V> s = rights;
7036	+	if (s != null && !inForkJoinPool()) {
7037	+	do  {
7038	+	if (s.tryUnfork())
7039	+	s.exec();
7040	+	} while ((s = s.nextRight) != null);
7041	+	}
7042	+	return false;
7043	+	}
7044	+	public final Integer getRawResult() { return result; }
7045	+	}
7046	+
7047	+	@SuppressWarnings("serial") static final class MapReduceEntriesToIntTask<K,V>
7048	+	extends BulkTask<K,V,Integer> {
7049	+	final ObjectToInt<Map.Entry<K,V>> transformer;
7050	+	final IntByIntToInt reducer;
7051	+	final int basis;
7052	+	int result;
7053	+	MapReduceEntriesToIntTask<K,V> rights, nextRight;
7054	+	MapReduceEntriesToIntTask
7055	+	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
7056	+	MapReduceEntriesToIntTask<K,V> nextRight,
7057	+	ObjectToInt<Map.Entry<K,V>> transformer,
7058	+	int basis,
7059	+	IntByIntToInt reducer) {
7060	+	super(m, p, b); this.nextRight = nextRight;
7061	+	this.transformer = transformer;
7062	+	this.basis = basis; this.reducer = reducer;
7063	+	}
7064	+	@SuppressWarnings("unchecked") public final boolean exec() {
7065	+	final ObjectToInt<Map.Entry<K,V>> transformer =
7066	+	this.transformer;
7067	+	final IntByIntToInt reducer = this.reducer;
7068	+	if (transformer == null || reducer == null)
7069	+	return abortOnNullFunction();
7070	+	try {
7071	+	final int id = this.basis;
7072	+	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
7073	+	do {} while (!casPending(c = pending, c+1));
7074	+	(rights = new MapReduceEntriesToIntTask<K,V>
7075	+	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
7076	+	}
7077	+	int r = id;
7078	+	Object v;
7079	+	while ((v = advance()) != null)
7080	+	r = reducer.apply(r, transformer.apply(entryFor((K)nextKey, (V)v)));
7081	+	result = r;
7082	+	for (MapReduceEntriesToIntTask<K,V> t = this, s;;) {
7083	+	int c; BulkTask<K,V,?> par;
7084	+	if ((c = t.pending) == 0) {
7085	+	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
7086	+	t.result = reducer.apply(t.result, s.result);
7087	+	}
7088	+	if ((par = t.parent) == null ||
7089	+	!(par instanceof MapReduceEntriesToIntTask)) {
7090	+	t.quietlyComplete();
7091	+	break;
7092	+	}
7093	+	t = (MapReduceEntriesToIntTask<K,V>)par;
7094	+	}
7095	+	else if (t.casPending(c, c - 1))
7096	+	break;
7097	+	}
7098	+	} catch (Throwable ex) {
7099	+	return tryCompleteComputation(ex);
7100	+	}
7101	+	MapReduceEntriesToIntTask<K,V> s = rights;
7102	+	if (s != null && !inForkJoinPool()) {
7103	+	do  {
7104	+	if (s.tryUnfork())
7105	+	s.exec();
7106	+	} while ((s = s.nextRight) != null);
7107	+	}
7108	+	return false;
7109	+	}
7110	+	public final Integer getRawResult() { return result; }
7111	+	}
7112	+
7113	+	@SuppressWarnings("serial") static final class MapReduceMappingsToIntTask<K,V>
7114	+	extends BulkTask<K,V,Integer> {
7115	+	final ObjectByObjectToInt<? super K, ? super V> transformer;
7116	+	final IntByIntToInt reducer;
7117	+	final int basis;
7118	+	int result;
7119	+	MapReduceMappingsToIntTask<K,V> rights, nextRight;
7120	+	MapReduceMappingsToIntTask
7121	+	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
7122	+	MapReduceMappingsToIntTask<K,V> rights,
7123	+	ObjectByObjectToInt<? super K, ? super V> transformer,
7124	+	int basis,
7125	+	IntByIntToInt reducer) {
7126	+	super(m, p, b); this.nextRight = nextRight;
7127	+	this.transformer = transformer;
7128	+	this.basis = basis; this.reducer = reducer;
7129	+	}
7130	+	@SuppressWarnings("unchecked") public final boolean exec() {
7131	+	final ObjectByObjectToInt<? super K, ? super V> transformer =
7132	+	this.transformer;
7133	+	final IntByIntToInt reducer = this.reducer;
7134	+	if (transformer == null || reducer == null)
7135	+	return abortOnNullFunction();
7136	+	try {
7137	+	final int id = this.basis;
7138	+	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
7139	+	do {} while (!casPending(c = pending, c+1));
7140	+	(rights = new MapReduceMappingsToIntTask<K,V>
7141	+	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
7142	+	}
7143	+	int r = id;
7144	+	Object v;
7145	+	while ((v = advance()) != null)
7146	+	r = reducer.apply(r, transformer.apply((K)nextKey, (V)v));
7147	+	result = r;
7148	+	for (MapReduceMappingsToIntTask<K,V> t = this, s;;) {
7149	+	int c; BulkTask<K,V,?> par;
7150	+	if ((c = t.pending) == 0) {
7151	+	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
7152	+	t.result = reducer.apply(t.result, s.result);
7153	+	}
7154	+	if ((par = t.parent) == null ||
7155	+	!(par instanceof MapReduceMappingsToIntTask)) {
7156	+	t.quietlyComplete();
7157	+	break;
7158	+	}
7159	+	t = (MapReduceMappingsToIntTask<K,V>)par;
7160	+	}
7161	+	else if (t.casPending(c, c - 1))
7162	+	break;
7163	+	}
7164	+	} catch (Throwable ex) {
7165	+	return tryCompleteComputation(ex);
7166	+	}
7167	+	MapReduceMappingsToIntTask<K,V> s = rights;
7168	+	if (s != null && !inForkJoinPool()) {
7169	+	do  {
7170	+	if (s.tryUnfork())
7171	+	s.exec();
7172	+	} while ((s = s.nextRight) != null);
7173	+	}
7174	+	return false;
7175	+	}
7176	+	public final Integer getRawResult() { return result; }
7177		}
7178
7179		// Unsafe mechanics
#	Line 2470 | Line 7230 | public class ConcurrentHashMapV8<K, V>
7230		}
7231		}
7232		}
2473	–
7233		}

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