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Comparing jsr166/src/jsr166e/ConcurrentHashMapV8.java (file contents):
Revision 1.66 by jsr166, Sun Oct 21 03:26:47 2012 UTC vs.
Revision 1.84 by dl, Sat Dec 15 20:21:25 2012 UTC

#	Line 5 | Line 5
5		*/
6
7		package jsr166e;
8	–	import jsr166e.LongAdder;
9	–	import jsr166e.ForkJoinPool;
10	–	import jsr166e.ForkJoinTask;
8
9		import java.util.Comparator;
10		import java.util.Arrays;
#	Line 24 | Line 21 | import java.util.Enumeration;
21		import java.util.ConcurrentModificationException;
22		import java.util.NoSuchElementException;
23		import java.util.concurrent.ConcurrentMap;
27	–	import java.util.concurrent.ThreadLocalRandom;
28	–	import java.util.concurrent.locks.LockSupport;
24		import java.util.concurrent.locks.AbstractQueuedSynchronizer;
25	+	import java.util.concurrent.atomic.AtomicInteger;
26		import java.util.concurrent.atomic.AtomicReference;
31	–
27		import java.io.Serializable;
28
29		/**
#	Line 43 | Line 38 | import java.io.Serializable;
38		* interoperable with {@code Hashtable} in programs that rely on its
39		* thread safety but not on its synchronization details.
40		*
41	<	* <p> Retrieval operations (including {@code get}) generally do not
41	>	* <p>Retrieval operations (including {@code get}) generally do not
42		* block, so may overlap with update operations (including {@code put}
43		* and {@code remove}). Retrievals reflect the results of the most
44		* recently <em>completed</em> update operations holding upon their
#	Line 64 | Line 59 | import java.io.Serializable;
59		* that may be adequate for monitoring or estimation purposes, but not
60		* for program control.
61		*
62	<	* <p> The table is dynamically expanded when there are too many
62	>	* <p>The table is dynamically expanded when there are too many
63		* collisions (i.e., keys that have distinct hash codes but fall into
64		* the same slot modulo the table size), with the expected average
65		* effect of maintaining roughly two bins per mapping (corresponding
#	Line 85 | Line 80 | import java.io.Serializable;
80		* {@code hashCode()} is a sure way to slow down performance of any
81		* hash table.
82		*
83	+	* <p>A {@link Set} projection of a ConcurrentHashMapV8 may be created
84	+	* (using {@link #newKeySet()} or {@link #newKeySet(int)}), or viewed
85	+	* (using {@link #keySet(Object)} when only keys are of interest, and the
86	+	* mapped values are (perhaps transiently) not used or all take the
87	+	* same mapping value.
88	+	*
89	+	* <p>A ConcurrentHashMapV8 can be used as scalable frequency map (a
90	+	* form of histogram or multiset) by using {@link LongAdder} values
91	+	* and initializing via {@link #computeIfAbsent}. For example, to add
92	+	* a count to a {@code ConcurrentHashMapV8<String,LongAdder> freqs}, you
93	+	* can use {@code freqs.computeIfAbsent(k -> new
94	+	* LongAdder()).increment();}
95	+	*
96		* <p>This class and its views and iterators implement all of the
97		* <em>optional</em> methods of the {@link Map} and {@link Iterator}
98		* interfaces.
99		*
100	<	* <p> Like {@link Hashtable} but unlike {@link HashMap}, this class
100	>	* <p>Like {@link Hashtable} but unlike {@link HashMap}, this class
101		* does <em>not</em> allow {@code null} to be used as a key or value.
102		*
103	+	* <p>ConcurrentHashMapV8s support sequential and parallel operations
104	+	* bulk operations. (Parallel forms use the {@link
105	+	* ForkJoinPool#commonPool()}). Tasks that may be used in other
106	+	* contexts are available in class {@link ForkJoinTasks}. These
107	+	* operations are designed to be safely, and often sensibly, applied
108	+	* even with maps that are being concurrently updated by other
109	+	* threads; for example, when computing a snapshot summary of the
110	+	* values in a shared registry.  There are three kinds of operation,
111	+	* each with four forms, accepting functions with Keys, Values,
112	+	* Entries, and (Key, Value) arguments and/or return values. Because
113	+	* the elements of a ConcurrentHashMapV8 are not ordered in any
114	+	* particular way, and may be processed in different orders in
115	+	* different parallel executions, the correctness of supplied
116	+	* functions should not depend on any ordering, or on any other
117	+	* objects or values that may transiently change while computation is
118	+	* in progress; and except for forEach actions, should ideally be
119	+	* side-effect-free.
120	+	*
121	+	* <ul>
122	+	* <li> forEach: Perform a given action on each element.
123	+	* A variant form applies a given transformation on each element
124	+	* before performing the action.</li>
125	+	*
126	+	* <li> search: Return the first available non-null result of
127	+	* applying a given function on each element; skipping further
128	+	* search when a result is found.</li>
129	+	*
130	+	* <li> reduce: Accumulate each element.  The supplied reduction
131	+	* function cannot rely on ordering (more formally, it should be
132	+	* both associative and commutative).  There are five variants:
133	+	*
134	+	* <ul>
135	+	*
136	+	* <li> Plain reductions. (There is not a form of this method for
137	+	* (key, value) function arguments since there is no corresponding
138	+	* return type.)</li>
139	+	*
140	+	* <li> Mapped reductions that accumulate the results of a given
141	+	* function applied to each element.</li>
142	+	*
143	+	* <li> Reductions to scalar doubles, longs, and ints, using a
144	+	* given basis value.</li>
145	+	*
146	+	* </li>
147	+	* </ul>
148	+	* </ul>
149	+	*
150	+	* <p>The concurrency properties of bulk operations follow
151	+	* from those of ConcurrentHashMapV8: Any non-null result returned
152	+	* from {@code get(key)} and related access methods bears a
153	+	* happens-before relation with the associated insertion or
154	+	* update.  The result of any bulk operation reflects the
155	+	* composition of these per-element relations (but is not
156	+	* necessarily atomic with respect to the map as a whole unless it
157	+	* is somehow known to be quiescent).  Conversely, because keys
158	+	* and values in the map are never null, null serves as a reliable
159	+	* atomic indicator of the current lack of any result.  To
160	+	* maintain this property, null serves as an implicit basis for
161	+	* all non-scalar reduction operations. For the double, long, and
162	+	* int versions, the basis should be one that, when combined with
163	+	* any other value, returns that other value (more formally, it
164	+	* should be the identity element for the reduction). Most common
165	+	* reductions have these properties; for example, computing a sum
166	+	* with basis 0 or a minimum with basis MAX_VALUE.
167	+	*
168	+	* <p>Search and transformation functions provided as arguments
169	+	* should similarly return null to indicate the lack of any result
170	+	* (in which case it is not used). In the case of mapped
171	+	* reductions, this also enables transformations to serve as
172	+	* filters, returning null (or, in the case of primitive
173	+	* specializations, the identity basis) if the element should not
174	+	* be combined. You can create compound transformations and
175	+	* filterings by composing them yourself under this "null means
176	+	* there is nothing there now" rule before using them in search or
177	+	* reduce operations.
178	+	*
179	+	* <p>Methods accepting and/or returning Entry arguments maintain
180	+	* key-value associations. They may be useful for example when
181	+	* finding the key for the greatest value. Note that "plain" Entry
182	+	* arguments can be supplied using {@code new
183	+	* AbstractMap.SimpleEntry(k,v)}.
184	+	*
185	+	* <p>Bulk operations may complete abruptly, throwing an
186	+	* exception encountered in the application of a supplied
187	+	* function. Bear in mind when handling such exceptions that other
188	+	* concurrently executing functions could also have thrown
189	+	* exceptions, or would have done so if the first exception had
190	+	* not occurred.
191	+	*
192	+	* <p>Speedups for parallel compared to sequential forms are common
193	+	* but not guaranteed.  Parallel operations involving brief functions
194	+	* on small maps may execute more slowly than sequential forms if the
195	+	* underlying work to parallelize the computation is more expensive
196	+	* than the computation itself.  Similarly, parallelization may not
197	+	* lead to much actual parallelism if all processors are busy
198	+	* performing unrelated tasks.
199	+	*
200	+	* <p>All arguments to all task methods must be non-null.
201	+	*
202	+	* <p><em>jsr166e note: During transition, this class
203	+	* uses nested functional interfaces with different names but the
204	+	* same forms as those expected for JDK8.</em>
205	+	*
206		* <p>This class is a member of the
207		* <a href="{@docRoot}/../technotes/guides/collections/index.html">
208		* Java Collections Framework</a>.
209		*
99	–	* <p><em>jsr166e note: This class is a candidate replacement for
100	–	* java.util.concurrent.ConcurrentHashMap.  During transition, this
101	–	* class declares and uses nested functional interfaces with different
102	–	* names but the same forms as those expected for JDK8.<em>
103	–	*
210		* @since 1.5
211		* @author Doug Lea
212		* @param <K> the type of keys maintained by this map
#	Line 117 | Line 223 | public class ConcurrentHashMapV8<K, V>
223		* portion of the elements, and so may be amenable to parallel
224		* execution.
225		*
226	<	* <p> This interface exports a subset of expected JDK8
226	>	* <p>This interface exports a subset of expected JDK8
227		* functionality.
228		*
229		* <p>Sample usage: Here is one (of the several) ways to compute
#	Line 189 | Line 295 | public class ConcurrentHashMapV8<K, V>
295		* the same or better than java.util.HashMap, and to support high
296		* initial insertion rates on an empty table by many threads.
297		*
298	<	* Each key-value mapping is held in a Node.  Because Node fields
299	<	* can contain special values, they are defined using plain Object
300	<	* types. Similarly in turn, all internal methods that use them
301	<	* work off Object types. And similarly, so do the internal
302	<	* methods of auxiliary iterator and view classes.  All public
303	<	* generic typed methods relay in/out of these internal methods,
304	<	* supplying null-checks and casts as needed. This also allows
305	<	* many of the public methods to be factored into a smaller number
306	<	* of internal methods (although sadly not so for the five
201	<	* variants of put-related operations). The validation-based
202	<	* approach explained below leads to a lot of code sprawl because
298	>	* Each key-value mapping is held in a Node.  Because Node key
299	>	* fields can contain special values, they are defined using plain
300	>	* Object types (not type "K"). This leads to a lot of explicit
301	>	* casting (and many explicit warning suppressions to tell
302	>	* compilers not to complain about it). It also allows some of the
303	>	* public methods to be factored into a smaller number of internal
304	>	* methods (although sadly not so for the five variants of
305	>	* put-related operations). The validation-based approach
306	>	* explained below leads to a lot of code sprawl because
307		* retry-control precludes factoring into smaller methods.
308		*
309		* The table is lazily initialized to a power-of-two size upon the
#	Line 213 | Line 317 | public class ConcurrentHashMapV8<K, V>
317		* as lookups check hash code and non-nullness of value before
318		* checking key equality.
319		*
320	<	* We use the top two bits of Node hash fields for control
321	<	* purposes -- they are available anyway because of addressing
322	<	* constraints.  As explained further below, these top bits are
323	<	* used as follows:
324	<	*  00 - Normal
325	<	*  01 - Locked
222	<	*  11 - Locked and may have a thread waiting for lock
223	<	*  10 - Node is a forwarding node
224	<	*
225	<	* The lower 30 bits of each Node's hash field contain a
226	<	* transformation of the key's hash code, except for forwarding
227	<	* nodes, for which the lower bits are zero (and so always have
228	<	* hash field == MOVED).
320	>	* We use the top (sign) bit of Node hash fields for control
321	>	* purposes -- it is available anyway because of addressing
322	>	* constraints.  Nodes with negative hash fields are forwarding
323	>	* nodes to either TreeBins or resized tables.  The lower 31 bits
324	>	* of each normal Node's hash field contain a transformation of
325	>	* the key's hash code.
326		*
327		* Insertion (via put or its variants) of the first node in an
328		* empty bin is performed by just CASing it to the bin.  This is
#	Line 234 | Line 331 | public class ConcurrentHashMapV8<K, V>
331		* delete, and replace) require locks.  We do not want to waste
332		* the space required to associate a distinct lock object with
333		* each bin, so instead use the first node of a bin list itself as
334	<	* a lock. Blocking support for these locks relies on the builtin
335	<	* "synchronized" monitors.  However, we also need a tryLock
239	<	* construction, so we overlay these by using bits of the Node
240	<	* hash field for lock control (see above), and so normally use
241	<	* builtin monitors only for blocking and signalling using
242	<	* wait/notifyAll constructions. See Node.tryAwaitLock.
334	>	* a lock. Locking support for these locks relies on builtin
335	>	* "synchronized" monitors.
336		*
337		* Using the first node of a list as a lock does not by itself
338		* suffice though: When a node is locked, any update must first
#	Line 301 | Line 394 | public class ConcurrentHashMapV8<K, V>
394		* iterators in the same way.
395		*
396		* The table is resized when occupancy exceeds a percentage
397	<	* threshold (nominally, 0.75, but see below).  Only a single
398	<	* thread performs the resize (using field "sizeCtl", to arrange
399	<	* exclusion), but the table otherwise remains usable for reads
400	<	* and updates. Resizing proceeds by transferring bins, one by
401	<	* one, from the table to the next table.  Because we are using
402	<	* power-of-two expansion, the elements from each bin must either
403	<	* stay at same index, or move with a power of two offset. We
404	<	* eliminate unnecessary node creation by catching cases where old
405	<	* nodes can be reused because their next fields won't change.  On
406	<	* average, only about one-sixth of them need cloning when a table
407	<	* doubles. The nodes they replace will be garbage collectable as
408	<	* soon as they are no longer referenced by any reader thread that
409	<	* may be in the midst of concurrently traversing table.  Upon
410	<	* transfer, the old table bin contains only a special forwarding
411	<	* node (with hash field "MOVED") that contains the next table as
412	<	* its key. On encountering a forwarding node, access and update
413	<	* operations restart, using the new table.
414	<	*
415	<	* Each bin transfer requires its bin lock. However, unlike other
416	<	* cases, a transfer can skip a bin if it fails to acquire its
417	<	* lock, and revisit it later (unless it is a TreeBin). Method
418	<	* rebuild maintains a buffer of TRANSFER_BUFFER_SIZE bins that
419	<	* have been skipped because of failure to acquire a lock, and
420	<	* blocks only if none are available (i.e., only very rarely).
421	<	* The transfer operation must also ensure that all accessible
422	<	* bins in both the old and new table are usable by any traversal.
423	<	* When there are no lock acquisition failures, this is arranged
424	<	* simply by proceeding from the last bin (table.length - 1) up
425	<	* towards the first.  Upon seeing a forwarding node, traversals
426	<	* (see class Iter) arrange to move to the new table
427	<	* without revisiting nodes.  However, when any node is skipped
428	<	* during a transfer, all earlier table bins may have become
429	<	* visible, so are initialized with a reverse-forwarding node back
430	<	* to the old table until the new ones are established. (This
431	<	* sometimes requires transiently locking a forwarding node, which
432	<	* is possible under the above encoding.) These more expensive
433	<	* mechanics trigger only when necessary.
397	>	* threshold (nominally, 0.75, but see below).  Any thread
398	>	* noticing an overfull bin may assist in resizing after the
399	>	* initiating thread allocates and sets up the replacement
400	>	* array. However, rather than stalling, these other threads may
401	>	* proceed with insertions etc.  The use of TreeBins shields us
402	>	* from the worst case effects of overfilling while resizes are in
403	>	* progress.  Resizing proceeds by transferring bins, one by one,
404	>	* from the table to the next table. To enable concurrency, the
405	>	* next table must be (incrementally) prefilled with place-holders
406	>	* serving as reverse forwarders to the old table.  Because we are
407	>	* using power-of-two expansion, the elements from each bin must
408	>	* either stay at same index, or move with a power of two
409	>	* offset. We eliminate unnecessary node creation by catching
410	>	* cases where old nodes can be reused because their next fields
411	>	* won't change.  On average, only about one-sixth of them need
412	>	* cloning when a table doubles. The nodes they replace will be
413	>	* garbage collectable as soon as they are no longer referenced by
414	>	* any reader thread that may be in the midst of concurrently
415	>	* traversing table.  Upon transfer, the old table bin contains
416	>	* only a special forwarding node (with hash field "MOVED") that
417	>	* contains the next table as its key. On encountering a
418	>	* forwarding node, access and update operations restart, using
419	>	* the new table.
420	>	*
421	>	* Each bin transfer requires its bin lock, which can stall
422	>	* waiting for locks while resizing. However, because other
423	>	* threads can join in and help resize rather than contend for
424	>	* locks, average aggregate waits become shorter as resizing
425	>	* progresses.  The transfer operation must also ensure that all
426	>	* accessible bins in both the old and new table are usable by any
427	>	* traversal.  This is arranged by proceeding from the last bin
428	>	* (table.length - 1) up towards the first.  Upon seeing a
429	>	* forwarding node, traversals (see class Traverser) arrange to
430	>	* move to the new table without revisiting nodes.  However, to
431	>	* ensure that no intervening nodes are skipped, bin splitting can
432	>	* only begin after the associated reverse-forwarders are in
433	>	* place.
434		*
435		* The traversal scheme also applies to partial traversals of
436		* ranges of bins (via an alternate Traverser constructor)
#	Line 352 | Line 445 | public class ConcurrentHashMapV8<K, V>
445		* These cases attempt to override the initial capacity settings,
446		* but harmlessly fail to take effect in cases of races.
447		*
448	<	* The element count is maintained using a LongAdder, which avoids
449	<	* contention on updates but can encounter cache thrashing if read
450	<	* too frequently during concurrent access. To avoid reading so
451	<	* often, resizing is attempted either when a bin lock is
452	<	* contended, or upon adding to a bin already holding two or more
453	<	* nodes (checked before adding in the xIfAbsent methods, after
454	<	* adding in others). Under uniform hash distributions, the
455	<	* probability of this occurring at threshold is around 13%,
456	<	* meaning that only about 1 in 8 puts check threshold (and after
457	<	* resizing, many fewer do so). But this approximation has high
458	<	* variance for small table sizes, so we check on any collision
459	<	* for sizes <= 64. The bulk putAll operation further reduces
460	<	* contention by only committing count updates upon these size
461	<	* checks.
448	>	* The element count is maintained using a specialization of
449	>	* LongAdder. We need to incorporate a specialization rather than
450	>	* just use a LongAdder in order to access implicit
451	>	* contention-sensing that leads to creation of multiple
452	>	* CounterCells.  The counter mechanics avoid contention on
453	>	* updates but can encounter cache thrashing if read too
454	>	* frequently during concurrent access. To avoid reading so often,
455	>	* resizing under contention is attempted only upon adding to a
456	>	* bin already holding two or more nodes. Under uniform hash
457	>	* distributions, the probability of this occurring at threshold
458	>	* is around 13%, meaning that only about 1 in 8 puts check
459	>	* threshold (and after resizing, many fewer do so). The bulk
460	>	* putAll operation further reduces contention by only committing
461	>	* count updates upon these size checks.
462		*
463		* Maintaining API and serialization compatibility with previous
464		* versions of this class introduces several oddities. Mainly: We
#	Line 416 | Line 509 | public class ConcurrentHashMapV8<K, V>
509		private static final float LOAD_FACTOR = 0.75f;
510
511		/**
419	–	* The buffer size for skipped bins during transfers. The
420	–	* value is arbitrary but should be large enough to avoid
421	–	* most locking stalls during resizes.
422	–	*/
423	–	private static final int TRANSFER_BUFFER_SIZE = 32;
424	–
425	–	/**
512		* The bin count threshold for using a tree rather than list for a
513		* bin.  The value reflects the approximate break-even point for
514		* using tree-based operations.
515		*/
516		private static final int TREE_THRESHOLD = 8;
517
518	+	/**
519	+	* Minimum number of rebinnings per transfer step. Ranges are
520	+	* subdivided to allow multiple resizer threads.  This value
521	+	* serves as a lower bound to avoid resizers encountering
522	+	* excessive memory contention.  The value should be at least
523	+	* DEFAULT_CAPACITY.
524	+	*/
525	+	private static final int MIN_TRANSFER_STRIDE = 16;
526	+
527		/*
528	<	* Encodings for special uses of Node hash fields. See above for
434	<	* explanation.
528	>	* Encodings for Node hash fields. See above for explanation.
529		*/
530		static final int MOVED     = 0x80000000; // hash field for forwarding nodes
531	<	static final int LOCKED    = 0x40000000; // set/tested only as a bit
532	<	static final int WAITING   = 0xc0000000; // both bits set/tested together
533	<	static final int HASH_BITS = 0x3fffffff; // usable bits of normal node hash
531	>	static final int HASH_BITS = 0x7fffffff; // usable bits of normal node hash
532	>
533	>	/** Number of CPUS, to place bounds on some sizings */
534	>	static final int NCPU = Runtime.getRuntime().availableProcessors();
535	>
536	>	/* ---------------- Counters -------------- */
537	>
538	>	// Adapted from LongAdder and Striped64.
539	>	// See their internal docs for explanation.
540	>
541	>	// A padded cell for distributing counts
542	>	static final class CounterCell {
543	>	volatile long p0, p1, p2, p3, p4, p5, p6;
544	>	volatile long value;
545	>	volatile long q0, q1, q2, q3, q4, q5, q6;
546	>	CounterCell(long x) { value = x; }
547	>	}
548	>
549	>	/**
550	>	* Holder for the thread-local hash code determining which
551	>	* CounterCell to use. The code is initialized via the
552	>	* counterHashCodeGenerator, but may be moved upon collisions.
553	>	*/
554	>	static final class CounterHashCode {
555	>	int code;
556	>	}
557	>
558	>	/**
559	>	* Generates initial value for per-thread CounterHashCodes
560	>	*/
561	>	static final AtomicInteger counterHashCodeGenerator = new AtomicInteger();
562	>
563	>	/**
564	>	* Increment for counterHashCodeGenerator. See class ThreadLocal
565	>	* for explanation.
566	>	*/
567	>	static final int SEED_INCREMENT = 0x61c88647;
568	>
569	>	/**
570	>	* Per-thread counter hash codes. Shared across all instances
571	>	*/
572	>	static final ThreadLocal<CounterHashCode> threadCounterHashCode =
573	>	new ThreadLocal<CounterHashCode>();
574
575		/* ---------------- Fields -------------- */
576
#	Line 444 | Line 578 | public class ConcurrentHashMapV8<K, V>
578		* The array of bins. Lazily initialized upon first insertion.
579		* Size is always a power of two. Accessed directly by iterators.
580		*/
581	<	transient volatile Node[] table;
581	>	transient volatile Node<V>[] table;
582
583		/**
584	<	* The counter maintaining number of elements.
584	>	* The next table to use; non-null only while resizing.
585		*/
586	<	private transient final LongAdder counter;
586	>	private transient volatile Node<V>[] nextTable;
587	>
588	>	/**
589	>	* Base counter value, used mainly when there is no contention,
590	>	* but also as a fallback during table initialization
591	>	* races. Updated via CAS.
592	>	*/
593	>	private transient volatile long baseCount;
594
595		/**
596		* Table initialization and resizing control.  When negative, the
597	<	* table is being initialized or resized. Otherwise, when table is
598	<	* null, holds the initial table size to use upon creation, or 0
599	<	* for default. After initialization, holds the next element count
600	<	* value upon which to resize the table.
597	>	* table is being initialized or resized: -1 for initialization,
598	>	* else -(1 + the number of active resizing threads).  Otherwise,
599	>	* when table is null, holds the initial table size to use upon
600	>	* creation, or 0 for default. After initialization, holds the
601	>	* next element count value upon which to resize the table.
602		*/
603		private transient volatile int sizeCtl;
604
605	+	/**
606	+	* The next table index (plus one) to split while resizing.
607	+	*/
608	+	private transient volatile int transferIndex;
609	+
610	+	/**
611	+	* The least available table index to split while resizing.
612	+	*/
613	+	private transient volatile int transferOrigin;
614	+
615	+	/**
616	+	* Spinlock (locked via CAS) used when resizing and/or creating Cells.
617	+	*/
618	+	private transient volatile int counterBusy;
619	+
620	+	/**
621	+	* Table of counter cells. When non-null, size is a power of 2.
622	+	*/
623	+	private transient volatile CounterCell[] counterCells;
624	+
625		// views
626	<	private transient KeySet<K,V> keySet;
627	<	private transient Values<K,V> values;
628	<	private transient EntrySet<K,V> entrySet;
626	>	private transient KeySetView<K,V> keySet;
627	>	private transient ValuesView<K,V> values;
628	>	private transient EntrySetView<K,V> entrySet;
629
630		/** For serialization compatibility. Null unless serialized; see below */
631		private Segment<K,V>[] segments;
#	Line 482 | Line 644 | public class ConcurrentHashMapV8<K, V>
644		* inline assignments below.
645		*/
646
647	<	static final Node tabAt(Node[] tab, int i) { // used by Iter
648	<	return (Node)UNSAFE.getObjectVolatile(tab, ((long)i<<ASHIFT)+ABASE);
647	>	@SuppressWarnings("unchecked") static final <V> Node<V> tabAt
648	>	(Node<V>[] tab, int i) { // used by Traverser
649	>	return (Node<V>)U.getObjectVolatile(tab, ((long)i << ASHIFT) + ABASE);
650		}
651
652	<	private static final boolean casTabAt(Node[] tab, int i, Node c, Node v) {
653	<	return UNSAFE.compareAndSwapObject(tab, ((long)i<<ASHIFT)+ABASE, c, v);
652	>	private static final <V> boolean casTabAt
653	>	(Node<V>[] tab, int i, Node<V> c, Node<V> v) {
654	>	return U.compareAndSwapObject(tab, ((long)i << ASHIFT) + ABASE, c, v);
655		}
656
657	<	private static final void setTabAt(Node[] tab, int i, Node v) {
658	<	UNSAFE.putObjectVolatile(tab, ((long)i<<ASHIFT)+ABASE, v);
657	>	private static final <V> void setTabAt
658	>	(Node<V>[] tab, int i, Node<V> v) {
659	>	U.putObjectVolatile(tab, ((long)i << ASHIFT) + ABASE, v);
660		}
661
662		/* ---------------- Nodes -------------- */
#	Line 506 | Line 671 | public class ConcurrentHashMapV8<K, V>
671		* before a val, but can only be used after checking val to be
672		* non-null.
673		*/
674	<	static class Node {
675	<	volatile int hash;
674	>	static class Node<V> {
675	>	final int hash;
676		final Object key;
677	<	volatile Object val;
678	<	volatile Node next;
677	>	volatile V val;
678	>	volatile Node<V> next;
679
680	<	Node(int hash, Object key, Object val, Node next) {
680	>	Node(int hash, Object key, V val, Node<V> next) {
681		this.hash = hash;
682		this.key = key;
683		this.val = val;
684		this.next = next;
685		}
521	–
522	–	/** CompareAndSet the hash field */
523	–	final boolean casHash(int cmp, int val) {
524	–	return UNSAFE.compareAndSwapInt(this, hashOffset, cmp, val);
525	–	}
526	–
527	–	/** The number of spins before blocking for a lock */
528	–	static final int MAX_SPINS =
529	–	Runtime.getRuntime().availableProcessors() > 1 ? 64 : 1;
530	–
531	–	/**
532	–	* Spins a while if LOCKED bit set and this node is the first
533	–	* of its bin, and then sets WAITING bits on hash field and
534	–	* blocks (once) if they are still set.  It is OK for this
535	–	* method to return even if lock is not available upon exit,
536	–	* which enables these simple single-wait mechanics.
537	–	*
538	–	* The corresponding signalling operation is performed within
539	–	* callers: Upon detecting that WAITING has been set when
540	–	* unlocking lock (via a failed CAS from non-waiting LOCKED
541	–	* state), unlockers acquire the sync lock and perform a
542	–	* notifyAll.
543	–	*
544	–	* The initial sanity check on tab and bounds is not currently
545	–	* necessary in the only usages of this method, but enables
546	–	* use in other future contexts.
547	–	*/
548	–	final void tryAwaitLock(Node[] tab, int i) {
549	–	if (tab != null && i >= 0 && i < tab.length) { // sanity check
550	–	int r = ThreadLocalRandom.current().nextInt(); // randomize spins
551	–	int spins = MAX_SPINS, h;
552	–	while (tabAt(tab, i) == this && ((h = hash) & LOCKED) != 0) {
553	–	if (spins >= 0) {
554	–	r ^= r << 1; r ^= r >>> 3; r ^= r << 10; // xorshift
555	–	if (r >= 0 && --spins == 0)
556	–	Thread.yield();  // yield before block
557	–	}
558	–	else if (casHash(h, h | WAITING)) {
559	–	synchronized (this) {
560	–	if (tabAt(tab, i) == this &&
561	–	(hash & WAITING) == WAITING) {
562	–	try {
563	–	wait();
564	–	} catch (InterruptedException ie) {
565	–	Thread.currentThread().interrupt();
566	–	}
567	–	}
568	–	else
569	–	notifyAll(); // possibly won race vs signaller
570	–	}
571	–	break;
572	–	}
573	–	}
574	–	}
575	–	}
576	–
577	–	// Unsafe mechanics for casHash
578	–	private static final sun.misc.Unsafe UNSAFE;
579	–	private static final long hashOffset;
580	–
581	–	static {
582	–	try {
583	–	UNSAFE = getUnsafe();
584	–	Class<?> k = Node.class;
585	–	hashOffset = UNSAFE.objectFieldOffset
586	–	(k.getDeclaredField("hash"));
587	–	} catch (Exception e) {
588	–	throw new Error(e);
589	–	}
590	–	}
686		}
687
688		/* ---------------- TreeBins -------------- */
#	Line 595 | Line 690 | public class ConcurrentHashMapV8<K, V>
690		/**
691		* Nodes for use in TreeBins
692		*/
693	<	static final class TreeNode extends Node {
694	<	TreeNode parent;  // red-black tree links
695	<	TreeNode left;
696	<	TreeNode right;
697	<	TreeNode prev;    // needed to unlink next upon deletion
693	>	static final class TreeNode<V> extends Node<V> {
694	>	TreeNode<V> parent;  // red-black tree links
695	>	TreeNode<V> left;
696	>	TreeNode<V> right;
697	>	TreeNode<V> prev;    // needed to unlink next upon deletion
698		boolean red;
699
700	<	TreeNode(int hash, Object key, Object val, Node next, TreeNode parent) {
700	>	TreeNode(int hash, Object key, V val, Node<V> next, TreeNode<V> parent) {
701		super(hash, key, val, next);
702		this.parent = parent;
703		}
#	Line 651 | Line 746 | public class ConcurrentHashMapV8<K, V>
746		* and writers. Since we don't need to export full Lock API, we
747		* just override the minimal AQS methods and use them directly.
748		*/
749	<	static final class TreeBin extends AbstractQueuedSynchronizer {
749	>	static final class TreeBin<V> extends AbstractQueuedSynchronizer {
750		private static final long serialVersionUID = 2249069246763182397L;
751	<	transient TreeNode root;  // root of tree
752	<	transient TreeNode first; // head of next-pointer list
751	>	transient TreeNode<V> root;  // root of tree
752	>	transient TreeNode<V> first; // head of next-pointer list
753
754		/* AQS overrides */
755		public final boolean isHeldExclusively() { return getState() > 0; }
#	Line 685 | Line 780 | public class ConcurrentHashMapV8<K, V>
780		}
781
782		/** From CLR */
783	<	private void rotateLeft(TreeNode p) {
783	>	private void rotateLeft(TreeNode<V> p) {
784		if (p != null) {
785	<	TreeNode r = p.right, pp, rl;
785	>	TreeNode<V> r = p.right, pp, rl;
786		if ((rl = p.right = r.left) != null)
787		rl.parent = p;
788		if ((pp = r.parent = p.parent) == null)
#	Line 702 | Line 797 | public class ConcurrentHashMapV8<K, V>
797		}
798
799		/** From CLR */
800	<	private void rotateRight(TreeNode p) {
800	>	private void rotateRight(TreeNode<V> p) {
801		if (p != null) {
802	<	TreeNode l = p.left, pp, lr;
802	>	TreeNode<V> l = p.left, pp, lr;
803		if ((lr = p.left = l.right) != null)
804		lr.parent = p;
805		if ((pp = l.parent = p.parent) == null)
#	Line 722 | Line 817 | public class ConcurrentHashMapV8<K, V>
817		* Returns the TreeNode (or null if not found) for the given key
818		* starting at given root.
819		*/
820	<	@SuppressWarnings("unchecked") final TreeNode getTreeNode
821	<	(int h, Object k, TreeNode p) {
820	>	@SuppressWarnings("unchecked") final TreeNode<V> getTreeNode
821	>	(int h, Object k, TreeNode<V> p) {
822		Class<?> c = k.getClass();
823		while (p != null) {
824		int dir, ph;  Object pk; Class<?> pc;
#	Line 733 | Line 828 | public class ConcurrentHashMapV8<K, V>
828		if (c != (pc = pk.getClass()) ||
829		!(k instanceof Comparable) ||
830		(dir = ((Comparable)k).compareTo((Comparable)pk)) == 0) {
831	<	dir = (c == pc) ? 0 : c.getName().compareTo(pc.getName());
832	<	TreeNode r = null, s = null, pl, pr;
833	<	if (dir >= 0) {
834	<	if ((pl = p.left) != null && h <= pl.hash)
835	<	s = pl;
831	>	if ((dir = (c == pc) ? 0 :
832	>	c.getName().compareTo(pc.getName())) == 0) {
833	>	TreeNode<V> r = null, pl, pr; // check both sides
834	>	if ((pr = p.right) != null && h >= pr.hash &&
835	>	(r = getTreeNode(h, k, pr)) != null)
836	>	return r;
837	>	else if ((pl = p.left) != null && h <= pl.hash)
838	>	dir = -1;
839	>	else // nothing there
840	>	return null;
841		}
742	–	else if ((pr = p.right) != null && h >= pr.hash)
743	–	s = pr;
744	–	if (s != null && (r = getTreeNode(h, k, s)) != null)
745	–	return r;
842		}
843		}
844		else
#	Line 757 | Line 853 | public class ConcurrentHashMapV8<K, V>
853		* read-lock to call getTreeNode, but during failure to get
854		* lock, searches along next links.
855		*/
856	<	final Object getValue(int h, Object k) {
857	<	Node r = null;
856	>	final V getValue(int h, Object k) {
857	>	Node<V> r = null;
858		int c = getState(); // Must read lock state first
859	<	for (Node e = first; e != null; e = e.next) {
859	>	for (Node<V> e = first; e != null; e = e.next) {
860		if (c <= 0 && compareAndSetState(c, c - 1)) {
861		try {
862		r = getTreeNode(h, k, root);
#	Line 769 | Line 865 | public class ConcurrentHashMapV8<K, V>
865		}
866		break;
867		}
868	<	else if ((e.hash & HASH_BITS) == h && k.equals(e.key)) {
868	>	else if (e.hash == h && k.equals(e.key)) {
869		r = e;
870		break;
871		}
#	Line 783 | Line 879 | public class ConcurrentHashMapV8<K, V>
879		* Finds or adds a node.
880		* @return null if added
881		*/
882	<	@SuppressWarnings("unchecked") final TreeNode putTreeNode
883	<	(int h, Object k, Object v) {
882	>	@SuppressWarnings("unchecked") final TreeNode<V> putTreeNode
883	>	(int h, Object k, V v) {
884		Class<?> c = k.getClass();
885	<	TreeNode pp = root, p = null;
885	>	TreeNode<V> pp = root, p = null;
886		int dir = 0;
887		while (pp != null) { // find existing node or leaf to insert at
888		int ph;  Object pk; Class<?> pc;
#	Line 797 | Line 893 | public class ConcurrentHashMapV8<K, V>
893		if (c != (pc = pk.getClass()) ||
894		!(k instanceof Comparable) ||
895		(dir = ((Comparable)k).compareTo((Comparable)pk)) == 0) {
896	<	dir = (c == pc) ? 0 : c.getName().compareTo(pc.getName());
897	<	TreeNode r = null, s = null, pl, pr;
898	<	if (dir >= 0) {
899	<	if ((pl = p.left) != null && h <= pl.hash)
900	<	s = pl;
896	>	TreeNode<V> s = null, r = null, pr;
897	>	if ((dir = (c == pc) ? 0 :
898	>	c.getName().compareTo(pc.getName())) == 0) {
899	>	if ((pr = p.right) != null && h >= pr.hash &&
900	>	(r = getTreeNode(h, k, pr)) != null)
901	>	return r;
902	>	else // continue left
903	>	dir = -1;
904		}
905		else if ((pr = p.right) != null && h >= pr.hash)
906		s = pr;
#	Line 814 | Line 913 | public class ConcurrentHashMapV8<K, V>
913		pp = (dir > 0) ? p.right : p.left;
914		}
915
916	<	TreeNode f = first;
917	<	TreeNode x = first = new TreeNode(h, k, v, f, p);
916	>	TreeNode<V> f = first;
917	>	TreeNode<V> x = first = new TreeNode<V>(h, k, v, f, p);
918		if (p == null)
919		root = x;
920		else { // attach and rebalance; adapted from CLR
921	<	TreeNode xp, xpp;
921	>	TreeNode<V> xp, xpp;
922		if (f != null)
923		f.prev = x;
924		if (dir <= 0)
#	Line 829 | Line 928 | public class ConcurrentHashMapV8<K, V>
928		x.red = true;
929		while (x != null && (xp = x.parent) != null && xp.red &&
930		(xpp = xp.parent) != null) {
931	<	TreeNode xppl = xpp.left;
931	>	TreeNode<V> xppl = xpp.left;
932		if (xp == xppl) {
933	<	TreeNode y = xpp.right;
933	>	TreeNode<V> y = xpp.right;
934		if (y != null && y.red) {
935		y.red = false;
936		xp.red = false;
#	Line 853 | Line 952 | public class ConcurrentHashMapV8<K, V>
952		}
953		}
954		else {
955	<	TreeNode y = xppl;
955	>	TreeNode<V> y = xppl;
956		if (y != null && y.red) {
957		y.red = false;
958		xp.red = false;
#	Line 875 | Line 974 | public class ConcurrentHashMapV8<K, V>
974		}
975		}
976		}
977	<	TreeNode r = root;
977	>	TreeNode<V> r = root;
978		if (r != null && r.red)
979		r.red = false;
980		}
#	Line 890 | Line 989 | public class ConcurrentHashMapV8<K, V>
989		* that are accessible independently of lock. So instead we
990		* swap the tree linkages.
991		*/
992	<	final void deleteTreeNode(TreeNode p) {
993	<	TreeNode next = (TreeNode)p.next; // unlink traversal pointers
994	<	TreeNode pred = p.prev;
992	>	final void deleteTreeNode(TreeNode<V> p) {
993	>	TreeNode<V> next = (TreeNode<V>)p.next; // unlink traversal pointers
994	>	TreeNode<V> pred = p.prev;
995		if (pred == null)
996		first = next;
997		else
998		pred.next = next;
999		if (next != null)
1000		next.prev = pred;
1001	<	TreeNode replacement;
1002	<	TreeNode pl = p.left;
1003	<	TreeNode pr = p.right;
1001	>	TreeNode<V> replacement;
1002	>	TreeNode<V> pl = p.left;
1003	>	TreeNode<V> pr = p.right;
1004		if (pl != null && pr != null) {
1005	<	TreeNode s = pr, sl;
1005	>	TreeNode<V> s = pr, sl;
1006		while ((sl = s.left) != null) // find successor
1007		s = sl;
1008		boolean c = s.red; s.red = p.red; p.red = c; // swap colors
1009	<	TreeNode sr = s.right;
1010	<	TreeNode pp = p.parent;
1009	>	TreeNode<V> sr = s.right;
1010	>	TreeNode<V> pp = p.parent;
1011		if (s == pr) { // p was s's direct parent
1012		p.parent = s;
1013		s.right = p;
1014		}
1015		else {
1016	<	TreeNode sp = s.parent;
1016	>	TreeNode<V> sp = s.parent;
1017		if ((p.parent = sp) != null) {
1018		if (s == sp.left)
1019		sp.left = p;
#	Line 939 | Line 1038 | public class ConcurrentHashMapV8<K, V>
1038		}
1039		else
1040		replacement = (pl != null) ? pl : pr;
1041	<	TreeNode pp = p.parent;
1041	>	TreeNode<V> pp = p.parent;
1042		if (replacement == null) {
1043		if (pp == null) {
1044		root = null;
#	Line 958 | Line 1057 | public class ConcurrentHashMapV8<K, V>
1057		p.left = p.right = p.parent = null;
1058		}
1059		if (!p.red) { // rebalance, from CLR
1060	<	TreeNode x = replacement;
1060	>	TreeNode<V> x = replacement;
1061		while (x != null) {
1062	<	TreeNode xp, xpl;
1062	>	TreeNode<V> xp, xpl;
1063		if (x.red || (xp = x.parent) == null) {
1064		x.red = false;
1065		break;
1066		}
1067		if (x == (xpl = xp.left)) {
1068	<	TreeNode sib = xp.right;
1068	>	TreeNode<V> sib = xp.right;
1069		if (sib != null && sib.red) {
1070		sib.red = false;
1071		xp.red = true;
#	Line 976 | Line 1075 | public class ConcurrentHashMapV8<K, V>
1075		if (sib == null)
1076		x = xp;
1077		else {
1078	<	TreeNode sl = sib.left, sr = sib.right;
1078	>	TreeNode<V> sl = sib.left, sr = sib.right;
1079		if ((sr == null || !sr.red) &&
1080		(sl == null || !sl.red)) {
1081		sib.red = true;
#	Line 988 | Line 1087 | public class ConcurrentHashMapV8<K, V>
1087		sl.red = false;
1088		sib.red = true;
1089		rotateRight(sib);
1090	<	sib = (xp = x.parent) == null ? null : xp.right;
1090	>	sib = (xp = x.parent) == null ?
1091	>	null : xp.right;
1092		}
1093		if (sib != null) {
1094		sib.red = (xp == null) ? false : xp.red;
#	Line 1004 | Line 1104 | public class ConcurrentHashMapV8<K, V>
1104		}
1105		}
1106		else { // symmetric
1107	<	TreeNode sib = xpl;
1107	>	TreeNode<V> sib = xpl;
1108		if (sib != null && sib.red) {
1109		sib.red = false;
1110		xp.red = true;
#	Line 1014 | Line 1114 | public class ConcurrentHashMapV8<K, V>
1114		if (sib == null)
1115		x = xp;
1116		else {
1117	<	TreeNode sl = sib.left, sr = sib.right;
1117	>	TreeNode<V> sl = sib.left, sr = sib.right;
1118		if ((sl == null || !sl.red) &&
1119		(sr == null || !sr.red)) {
1120		sib.red = true;
#	Line 1026 | Line 1126 | public class ConcurrentHashMapV8<K, V>
1126		sr.red = false;
1127		sib.red = true;
1128		rotateLeft(sib);
1129	<	sib = (xp = x.parent) == null ? null : xp.left;
1129	>	sib = (xp = x.parent) == null ?
1130	>	null : xp.left;
1131		}
1132		if (sib != null) {
1133		sib.red = (xp == null) ? false : xp.red;
#	Line 1056 | Line 1157 | public class ConcurrentHashMapV8<K, V>
1157		/* ---------------- Collision reduction methods -------------- */
1158
1159		/**
1160	<	* Spreads higher bits to lower, and also forces top 2 bits to 0.
1160	>	* Spreads higher bits to lower, and also forces top bit to 0.
1161		* Because the table uses power-of-two masking, sets of hashes
1162		* that vary only in bits above the current mask will always
1163		* collide. (Among known examples are sets of Float keys holding
#	Line 1074 | Line 1175 | public class ConcurrentHashMapV8<K, V>
1175		}
1176
1177		/**
1178	<	* Replaces a list bin with a tree bin. Call only when locked.
1179	<	* Fails to replace if the given key is non-comparable or table
1180	<	* is, or needs, resizing.
1181	<	*/
1182	<	private final void replaceWithTreeBin(Node[] tab, int index, Object key) {
1183	<	if ((key instanceof Comparable) &&
1184	<	(tab.length >= MAXIMUM_CAPACITY || counter.sum() < (long)sizeCtl)) {
1185	<	TreeBin t = new TreeBin();
1186	<	for (Node e = tabAt(tab, index); e != null; e = e.next)
1086	<	t.putTreeNode(e.hash & HASH_BITS, e.key, e.val);
1087	<	setTabAt(tab, index, new Node(MOVED, t, null, null));
1178	>	* Replaces a list bin with a tree bin if key is comparable.  Call
1179	>	* only when locked.
1180	>	*/
1181	>	private final void replaceWithTreeBin(Node<V>[] tab, int index, Object key) {
1182	>	if (key instanceof Comparable) {
1183	>	TreeBin<V> t = new TreeBin<V>();
1184	>	for (Node<V> e = tabAt(tab, index); e != null; e = e.next)
1185	>	t.putTreeNode(e.hash, e.key, e.val);
1186	>	setTabAt(tab, index, new Node<V>(MOVED, t, null, null));
1187		}
1188		}
1189
1190		/* ---------------- Internal access and update methods -------------- */
1191
1192		/** Implementation for get and containsKey */
1193	<	private final Object internalGet(Object k) {
1193	>	@SuppressWarnings("unchecked") private final V internalGet(Object k) {
1194		int h = spread(k.hashCode());
1195	<	retry: for (Node[] tab = table; tab != null;) {
1196	<	Node e, p; Object ek, ev; int eh;      // locals to read fields once
1195	>	retry: for (Node<V>[] tab = table; tab != null;) {
1196	>	Node<V> e; Object ek; V ev; int eh; // locals to read fields once
1197		for (e = tabAt(tab, (tab.length - 1) & h); e != null; e = e.next) {
1198	<	if ((eh = e.hash) == MOVED) {
1198	>	if ((eh = e.hash) < 0) {
1199		if ((ek = e.key) instanceof TreeBin)  // search TreeBin
1200	<	return ((TreeBin)ek).getValue(h, k);
1201	<	else {                        // restart with new table
1202	<	tab = (Node[])ek;
1200	>	return ((TreeBin<V>)ek).getValue(h, k);
1201	>	else {                      // restart with new table
1202	>	tab = (Node<V>[])ek;
1203		continue retry;
1204		}
1205		}
1206	<	else if ((eh & HASH_BITS) == h && (ev = e.val) != null &&
1206	>	else if (eh == h && (ev = e.val) != null &&
1207		((ek = e.key) == k || k.equals(ek)))
1208		return ev;
1209		}
#	Line 1118 | Line 1217 | public class ConcurrentHashMapV8<K, V>
1217		* Replaces node value with v, conditional upon match of cv if
1218		* non-null.  If resulting value is null, delete.
1219		*/
1220	<	private final Object internalReplace(Object k, Object v, Object cv) {
1220	>	@SuppressWarnings("unchecked") private final V internalReplace
1221	>	(Object k, V v, Object cv) {
1222		int h = spread(k.hashCode());
1223	<	Object oldVal = null;
1224	<	for (Node[] tab = table;;) {
1225	<	Node f; int i, fh; Object fk;
1223	>	V oldVal = null;
1224	>	for (Node<V>[] tab = table;;) {
1225	>	Node<V> f; int i, fh; Object fk;
1226		if (tab == null ||
1227		(f = tabAt(tab, i = (tab.length - 1) & h)) == null)
1228		break;
1229	<	else if ((fh = f.hash) == MOVED) {
1229	>	else if ((fh = f.hash) < 0) {
1230		if ((fk = f.key) instanceof TreeBin) {
1231	<	TreeBin t = (TreeBin)fk;
1231	>	TreeBin<V> t = (TreeBin<V>)fk;
1232		boolean validated = false;
1233		boolean deleted = false;
1234		t.acquire(0);
1235		try {
1236		if (tabAt(tab, i) == f) {
1237		validated = true;
1238	<	TreeNode p = t.getTreeNode(h, k, t.root);
1238	>	TreeNode<V> p = t.getTreeNode(h, k, t.root);
1239		if (p != null) {
1240	<	Object pv = p.val;
1240	>	V pv = p.val;
1241		if (cv == null || cv == pv || cv.equals(pv)) {
1242		oldVal = pv;
1243		if ((p.val = v) == null) {
#	Line 1152 | Line 1252 | public class ConcurrentHashMapV8<K, V>
1252		}
1253		if (validated) {
1254		if (deleted)
1255	<	counter.add(-1L);
1255	>	addCount(-1L, -1);
1256		break;
1257		}
1258		}
1259		else
1260	<	tab = (Node[])fk;
1260	>	tab = (Node<V>[])fk;
1261		}
1262	<	else if ((fh & HASH_BITS) != h && f.next == null) // precheck
1262	>	else if (fh != h && f.next == null) // precheck
1263		break;                          // rules out possible existence
1264	<	else if ((fh & LOCKED) != 0) {
1165	<	checkForResize();               // try resizing if can't get lock
1166	<	f.tryAwaitLock(tab, i);
1167	<	}
1168	<	else if (f.casHash(fh, fh | LOCKED)) {
1264	>	else {
1265		boolean validated = false;
1266		boolean deleted = false;
1267	<	try {
1267	>	synchronized (f) {
1268		if (tabAt(tab, i) == f) {
1269		validated = true;
1270	<	for (Node e = f, pred = null;;) {
1271	<	Object ek, ev;
1272	<	if ((e.hash & HASH_BITS) == h &&
1270	>	for (Node<V> e = f, pred = null;;) {
1271	>	Object ek; V ev;
1272	>	if (e.hash == h &&
1273		((ev = e.val) != null) &&
1274		((ek = e.key) == k || k.equals(ek))) {
1275		if (cv == null || cv == ev || cv.equals(ev)) {
1276		oldVal = ev;
1277		if ((e.val = v) == null) {
1278		deleted = true;
1279	<	Node en = e.next;
1279	>	Node<V> en = e.next;
1280		if (pred != null)
1281		pred.next = en;
1282		else
#	Line 1194 | Line 1290 | public class ConcurrentHashMapV8<K, V>
1290		break;
1291		}
1292		}
1197	–	} finally {
1198	–	if (!f.casHash(fh | LOCKED, fh)) {
1199	–	f.hash = fh;
1200	–	synchronized (f) { f.notifyAll(); };
1201	–	}
1293		}
1294		if (validated) {
1295		if (deleted)
1296	<	counter.add(-1L);
1296	>	addCount(-1L, -1);
1297		break;
1298		}
1299		}
#	Line 1211 | Line 1302 | public class ConcurrentHashMapV8<K, V>
1302		}
1303
1304		/*
1305	<	* Internal versions of the six insertion methods, each a
1306	<	* little more complicated than the last. All have
1216	<	* the same basic structure as the first (internalPut):
1305	>	* Internal versions of insertion methods
1306	>	* All have the same basic structure as the first (internalPut):
1307		*  1. If table uninitialized, create
1308		*  2. If bin empty, try to CAS new node
1309		*  3. If bin stale, use new table
1310		*  4. if bin converted to TreeBin, validate and relay to TreeBin methods
1311		*  5. Lock and validate; if valid, scan and add or update
1312		*
1313	<	* The others interweave other checks and/or alternative actions:
1314	<	*  * Plain put checks for and performs resize after insertion.
1315	<	*  * putIfAbsent prescans for mapping without lock (and fails to add
1316	<	*    if present), which also makes pre-emptive resize checks worthwhile.
1317	<	*  * computeIfAbsent extends form used in putIfAbsent with additional
1318	<	*    mechanics to deal with, calls, potential exceptions and null
1319	<	*    returns from function call.
1230	<	*  * compute uses the same function-call mechanics, but without
1231	<	*    the prescans
1232	<	*  * merge acts as putIfAbsent in the absent case, but invokes the
1233	<	*    update function if present
1234	<	*  * putAll attempts to pre-allocate enough table space
1235	<	*    and more lazily performs count updates and checks.
1236	<	*
1237	<	* Someday when details settle down a bit more, it might be worth
1238	<	* some factoring to reduce sprawl.
1313	>	* The putAll method differs mainly in attempting to pre-allocate
1314	>	* enough table space, and also more lazily performs count updates
1315	>	* and checks.
1316	>	*
1317	>	* Most of the function-accepting methods can't be factored nicely
1318	>	* because they require different functional forms, so instead
1319	>	* sprawl out similar mechanics.
1320		*/
1321
1322	<	/** Implementation for put */
1323	<	private final Object internalPut(Object k, Object v) {
1322	>	/** Implementation for put and putIfAbsent */
1323	>	@SuppressWarnings("unchecked") private final V internalPut
1324	>	(K k, V v, boolean onlyIfAbsent) {
1325	>	if (k == null || v == null) throw new NullPointerException();
1326		int h = spread(k.hashCode());
1327	<	int count = 0;
1328	<	for (Node[] tab = table;;) {
1329	<	int i; Node f; int fh; Object fk;
1327	>	int len = 0;
1328	>	for (Node<V>[] tab = table;;) {
1329	>	int i, fh; Node<V> f; Object fk; V fv;
1330		if (tab == null)
1331		tab = initTable();
1332		else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) {
1333	<	if (casTabAt(tab, i, null, new Node(h, k, v, null)))
1333	>	if (casTabAt(tab, i, null, new Node<V>(h, k, v, null)))
1334		break;                   // no lock when adding to empty bin
1335		}
1336	<	else if ((fh = f.hash) == MOVED) {
1336	>	else if ((fh = f.hash) < 0) {
1337		if ((fk = f.key) instanceof TreeBin) {
1338	<	TreeBin t = (TreeBin)fk;
1339	<	Object oldVal = null;
1338	>	TreeBin<V> t = (TreeBin<V>)fk;
1339	>	V oldVal = null;
1340		t.acquire(0);
1341		try {
1342		if (tabAt(tab, i) == f) {
1343	<	count = 2;
1344	<	TreeNode p = t.putTreeNode(h, k, v);
1343	>	len = 2;
1344	>	TreeNode<V> p = t.putTreeNode(h, k, v);
1345		if (p != null) {
1346		oldVal = p.val;
1347	<	p.val = v;
1347	>	if (!onlyIfAbsent)
1348	>	p.val = v;
1349		}
1350		}
1351		} finally {
1352		t.release(0);
1353		}
1354	<	if (count != 0) {
1354	>	if (len != 0) {
1355		if (oldVal != null)
1356		return oldVal;
1357		break;
1358		}
1359		}
1360		else
1361	<	tab = (Node[])fk;
1361	>	tab = (Node<V>[])fk;
1362		}
1363	<	else if ((fh & LOCKED) != 0) {
1364	<	checkForResize();
1365	<	f.tryAwaitLock(tab, i);
1366	<	}
1367	<	else if (f.casHash(fh, fh | LOCKED)) {
1368	<	Object oldVal = null;
1285	<	try {                        // needed in case equals() throws
1363	>	else if (onlyIfAbsent && fh == h && (fv = f.val) != null &&
1364	>	((fk = f.key) == k || k.equals(fk))) // peek while nearby
1365	>	return fv;
1366	>	else {
1367	>	V oldVal = null;
1368	>	synchronized (f) {
1369		if (tabAt(tab, i) == f) {
1370	<	count = 1;
1371	<	for (Node e = f;; ++count) {
1372	<	Object ek, ev;
1373	<	if ((e.hash & HASH_BITS) == h &&
1370	>	len = 1;
1371	>	for (Node<V> e = f;; ++len) {
1372	>	Object ek; V ev;
1373	>	if (e.hash == h &&
1374		(ev = e.val) != null &&
1375		((ek = e.key) == k || k.equals(ek))) {
1376		oldVal = ev;
1377	<	e.val = v;
1377	>	if (!onlyIfAbsent)
1378	>	e.val = v;
1379		break;
1380		}
1381	<	Node last = e;
1381	>	Node<V> last = e;
1382		if ((e = e.next) == null) {
1383	<	last.next = new Node(h, k, v, null);
1384	<	if (count >= TREE_THRESHOLD)
1383	>	last.next = new Node<V>(h, k, v, null);
1384	>	if (len >= TREE_THRESHOLD)
1385		replaceWithTreeBin(tab, i, k);
1386		break;
1387		}
1388		}
1389		}
1306	–	} finally {                  // unlock and signal if needed
1307	–	if (!f.casHash(fh | LOCKED, fh)) {
1308	–	f.hash = fh;
1309	–	synchronized (f) { f.notifyAll(); };
1310	–	}
1390		}
1391	<	if (count != 0) {
1391	>	if (len != 0) {
1392		if (oldVal != null)
1393		return oldVal;
1315	–	if (tab.length <= 64)
1316	–	count = 2;
1394		break;
1395		}
1396		}
1397		}
1398	<	counter.add(1L);
1322	<	if (count > 1)
1323	<	checkForResize();
1324	<	return null;
1325	<	}
1326	<
1327	<	/** Implementation for putIfAbsent */
1328	<	private final Object internalPutIfAbsent(Object k, Object v) {
1329	<	int h = spread(k.hashCode());
1330	<	int count = 0;
1331	<	for (Node[] tab = table;;) {
1332	<	int i; Node f; int fh; Object fk, fv;
1333	<	if (tab == null)
1334	<	tab = initTable();
1335	<	else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) {
1336	<	if (casTabAt(tab, i, null, new Node(h, k, v, null)))
1337	<	break;
1338	<	}
1339	<	else if ((fh = f.hash) == MOVED) {
1340	<	if ((fk = f.key) instanceof TreeBin) {
1341	<	TreeBin t = (TreeBin)fk;
1342	<	Object oldVal = null;
1343	<	t.acquire(0);
1344	<	try {
1345	<	if (tabAt(tab, i) == f) {
1346	<	count = 2;
1347	<	TreeNode p = t.putTreeNode(h, k, v);
1348	<	if (p != null)
1349	<	oldVal = p.val;
1350	<	}
1351	<	} finally {
1352	<	t.release(0);
1353	<	}
1354	<	if (count != 0) {
1355	<	if (oldVal != null)
1356	<	return oldVal;
1357	<	break;
1358	<	}
1359	<	}
1360	<	else
1361	<	tab = (Node[])fk;
1362	<	}
1363	<	else if ((fh & HASH_BITS) == h && (fv = f.val) != null &&
1364	<	((fk = f.key) == k || k.equals(fk)))
1365	<	return fv;
1366	<	else {
1367	<	Node g = f.next;
1368	<	if (g != null) { // at least 2 nodes -- search and maybe resize
1369	<	for (Node e = g;;) {
1370	<	Object ek, ev;
1371	<	if ((e.hash & HASH_BITS) == h && (ev = e.val) != null &&
1372	<	((ek = e.key) == k || k.equals(ek)))
1373	<	return ev;
1374	<	if ((e = e.next) == null) {
1375	<	checkForResize();
1376	<	break;
1377	<	}
1378	<	}
1379	<	}
1380	<	if (((fh = f.hash) & LOCKED) != 0) {
1381	<	checkForResize();
1382	<	f.tryAwaitLock(tab, i);
1383	<	}
1384	<	else if (tabAt(tab, i) == f && f.casHash(fh, fh | LOCKED)) {
1385	<	Object oldVal = null;
1386	<	try {
1387	<	if (tabAt(tab, i) == f) {
1388	<	count = 1;
1389	<	for (Node e = f;; ++count) {
1390	<	Object ek, ev;
1391	<	if ((e.hash & HASH_BITS) == h &&
1392	<	(ev = e.val) != null &&
1393	<	((ek = e.key) == k || k.equals(ek))) {
1394	<	oldVal = ev;
1395	<	break;
1396	<	}
1397	<	Node last = e;
1398	<	if ((e = e.next) == null) {
1399	<	last.next = new Node(h, k, v, null);
1400	<	if (count >= TREE_THRESHOLD)
1401	<	replaceWithTreeBin(tab, i, k);
1402	<	break;
1403	<	}
1404	<	}
1405	<	}
1406	<	} finally {
1407	<	if (!f.casHash(fh | LOCKED, fh)) {
1408	<	f.hash = fh;
1409	<	synchronized (f) { f.notifyAll(); };
1410	<	}
1411	<	}
1412	<	if (count != 0) {
1413	<	if (oldVal != null)
1414	<	return oldVal;
1415	<	if (tab.length <= 64)
1416	<	count = 2;
1417	<	break;
1418	<	}
1419	<	}
1420	<	}
1421	<	}
1422	<	counter.add(1L);
1423	<	if (count > 1)
1424	<	checkForResize();
1398	>	addCount(1L, len);
1399		return null;
1400		}
1401
1402		/** Implementation for computeIfAbsent */
1403	<	private final Object internalComputeIfAbsent(K k,
1404	<	Fun<? super K, ?> mf) {
1403	>	@SuppressWarnings("unchecked") private final V internalComputeIfAbsent
1404	>	(K k, Fun<? super K, ? extends V> mf) {
1405	>	if (k == null || mf == null)
1406	>	throw new NullPointerException();
1407		int h = spread(k.hashCode());
1408	<	Object val = null;
1409	<	int count = 0;
1410	<	for (Node[] tab = table;;) {
1411	<	Node f; int i, fh; Object fk, fv;
1408	>	V val = null;
1409	>	int len = 0;
1410	>	for (Node<V>[] tab = table;;) {
1411	>	Node<V> f; int i; Object fk;
1412		if (tab == null)
1413		tab = initTable();
1414		else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) {
1415	<	Node node = new Node(fh = h | LOCKED, k, null, null);
1416	<	if (casTabAt(tab, i, null, node)) {
1417	<	count = 1;
1418	<	try {
1419	<	if ((val = mf.apply(k)) != null)
1420	<	node.val = val;
1421	<	} finally {
1422	<	if (val == null)
1423	<	setTabAt(tab, i, null);
1424	<	if (!node.casHash(fh, h)) {
1449	<	node.hash = h;
1450	<	synchronized (node) { node.notifyAll(); };
1415	>	Node<V> node = new Node<V>(h, k, null, null);
1416	>	synchronized (node) {
1417	>	if (casTabAt(tab, i, null, node)) {
1418	>	len = 1;
1419	>	try {
1420	>	if ((val = mf.apply(k)) != null)
1421	>	node.val = val;
1422	>	} finally {
1423	>	if (val == null)
1424	>	setTabAt(tab, i, null);
1425		}
1426		}
1427		}
1428	<	if (count != 0)
1428	>	if (len != 0)
1429		break;
1430		}
1431	<	else if ((fh = f.hash) == MOVED) {
1431	>	else if (f.hash < 0) {
1432		if ((fk = f.key) instanceof TreeBin) {
1433	<	TreeBin t = (TreeBin)fk;
1433	>	TreeBin<V> t = (TreeBin<V>)fk;
1434		boolean added = false;
1435		t.acquire(0);
1436		try {
1437		if (tabAt(tab, i) == f) {
1438	<	count = 1;
1439	<	TreeNode p = t.getTreeNode(h, k, t.root);
1438	>	len = 1;
1439	>	TreeNode<V> p = t.getTreeNode(h, k, t.root);
1440		if (p != null)
1441		val = p.val;
1442		else if ((val = mf.apply(k)) != null) {
1443		added = true;
1444	<	count = 2;
1444	>	len = 2;
1445		t.putTreeNode(h, k, val);
1446		}
1447		}
1448		} finally {
1449		t.release(0);
1450		}
1451	<	if (count != 0) {
1451	>	if (len != 0) {
1452		if (!added)
1453		return val;
1454		break;
1455		}
1456		}
1457		else
1458	<	tab = (Node[])fk;
1458	>	tab = (Node<V>[])fk;
1459		}
1486	–	else if ((fh & HASH_BITS) == h && (fv = f.val) != null &&
1487	–	((fk = f.key) == k || k.equals(fk)))
1488	–	return fv;
1460		else {
1461	<	Node g = f.next;
1462	<	if (g != null) {
1463	<	for (Node e = g;;) {
1464	<	Object ek, ev;
1465	<	if ((e.hash & HASH_BITS) == h && (ev = e.val) != null &&
1495	<	((ek = e.key) == k || k.equals(ek)))
1496	<	return ev;
1497	<	if ((e = e.next) == null) {
1498	<	checkForResize();
1499	<	break;
1500	<	}
1501	<	}
1502	<	}
1503	<	if (((fh = f.hash) & LOCKED) != 0) {
1504	<	checkForResize();
1505	<	f.tryAwaitLock(tab, i);
1461	>	for (Node<V> e = f; e != null; e = e.next) { // prescan
1462	>	Object ek; V ev;
1463	>	if (e.hash == h && (ev = e.val) != null &&
1464	>	((ek = e.key) == k || k.equals(ek)))
1465	>	return ev;
1466		}
1467	<	else if (tabAt(tab, i) == f && f.casHash(fh, fh | LOCKED)) {
1468	<	boolean added = false;
1469	<	try {
1470	<	if (tabAt(tab, i) == f) {
1471	<	count = 1;
1472	<	for (Node e = f;; ++count) {
1473	<	Object ek, ev;
1474	<	if ((e.hash & HASH_BITS) == h &&
1475	<	(ev = e.val) != null &&
1476	<	((ek = e.key) == k || k.equals(ek))) {
1477	<	val = ev;
1478	<	break;
1479	<	}
1480	<	Node last = e;
1481	<	if ((e = e.next) == null) {
1482	<	if ((val = mf.apply(k)) != null) {
1483	<	added = true;
1484	<	last.next = new Node(h, k, val, null);
1485	<	if (count >= TREE_THRESHOLD)
1526	<	replaceWithTreeBin(tab, i, k);
1527	<	}
1528	<	break;
1467	>	boolean added = false;
1468	>	synchronized (f) {
1469	>	if (tabAt(tab, i) == f) {
1470	>	len = 1;
1471	>	for (Node<V> e = f;; ++len) {
1472	>	Object ek; V ev;
1473	>	if (e.hash == h &&
1474	>	(ev = e.val) != null &&
1475	>	((ek = e.key) == k || k.equals(ek))) {
1476	>	val = ev;
1477	>	break;
1478	>	}
1479	>	Node<V> last = e;
1480	>	if ((e = e.next) == null) {
1481	>	if ((val = mf.apply(k)) != null) {
1482	>	added = true;
1483	>	last.next = new Node<V>(h, k, val, null);
1484	>	if (len >= TREE_THRESHOLD)
1485	>	replaceWithTreeBin(tab, i, k);
1486		}
1487	+	break;
1488		}
1489		}
1532	–	} finally {
1533	–	if (!f.casHash(fh | LOCKED, fh)) {
1534	–	f.hash = fh;
1535	–	synchronized (f) { f.notifyAll(); };
1536	–	}
1537	–	}
1538	–	if (count != 0) {
1539	–	if (!added)
1540	–	return val;
1541	–	if (tab.length <= 64)
1542	–	count = 2;
1543	–	break;
1490		}
1491		}
1492	+	if (len != 0) {
1493	+	if (!added)
1494	+	return val;
1495	+	break;
1496	+	}
1497		}
1498		}
1499	<	if (val != null) {
1500	<	counter.add(1L);
1550	<	if (count > 1)
1551	<	checkForResize();
1552	<	}
1499	>	if (val != null)
1500	>	addCount(1L, len);
1501		return val;
1502		}
1503
1504		/** Implementation for compute */
1505	<	@SuppressWarnings("unchecked") private final Object internalCompute
1506	<	(K k, boolean onlyIfPresent, BiFun<? super K, ? super V, ? extends V> mf) {
1505	>	@SuppressWarnings("unchecked") private final V internalCompute
1506	>	(K k, boolean onlyIfPresent,
1507	>	BiFun<? super K, ? super V, ? extends V> mf) {
1508	>	if (k == null || mf == null)
1509	>	throw new NullPointerException();
1510		int h = spread(k.hashCode());
1511	<	Object val = null;
1511	>	V val = null;
1512		int delta = 0;
1513	<	int count = 0;
1514	<	for (Node[] tab = table;;) {
1515	<	Node f; int i, fh; Object fk;
1513	>	int len = 0;
1514	>	for (Node<V>[] tab = table;;) {
1515	>	Node<V> f; int i, fh; Object fk;
1516		if (tab == null)
1517		tab = initTable();
1518		else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) {
1519		if (onlyIfPresent)
1520		break;
1521	<	Node node = new Node(fh = h | LOCKED, k, null, null);
1522	<	if (casTabAt(tab, i, null, node)) {
1523	<	try {
1524	<	count = 1;
1525	<	if ((val = mf.apply(k, null)) != null) {
1526	<	node.val = val;
1527	<	delta = 1;
1528	<	}
1529	<	} finally {
1530	<	if (delta == 0)
1531	<	setTabAt(tab, i, null);
1532	<	if (!node.casHash(fh, h)) {
1582	<	node.hash = h;
1583	<	synchronized (node) { node.notifyAll(); };
1521	>	Node<V> node = new Node<V>(h, k, null, null);
1522	>	synchronized (node) {
1523	>	if (casTabAt(tab, i, null, node)) {
1524	>	try {
1525	>	len = 1;
1526	>	if ((val = mf.apply(k, null)) != null) {
1527	>	node.val = val;
1528	>	delta = 1;
1529	>	}
1530	>	} finally {
1531	>	if (delta == 0)
1532	>	setTabAt(tab, i, null);
1533		}
1534		}
1535		}
1536	<	if (count != 0)
1536	>	if (len != 0)
1537		break;
1538		}
1539	<	else if ((fh = f.hash) == MOVED) {
1539	>	else if ((fh = f.hash) < 0) {
1540		if ((fk = f.key) instanceof TreeBin) {
1541	<	TreeBin t = (TreeBin)fk;
1541	>	TreeBin<V> t = (TreeBin<V>)fk;
1542		t.acquire(0);
1543		try {
1544		if (tabAt(tab, i) == f) {
1545	<	count = 1;
1546	<	TreeNode p = t.getTreeNode(h, k, t.root);
1547	<	Object pv = (p == null) ? null : p.val;
1548	<	if ((val = mf.apply(k, (V)pv)) != null) {
1545	>	len = 1;
1546	>	TreeNode<V> p = t.getTreeNode(h, k, t.root);
1547	>	if (p == null && onlyIfPresent)
1548	>	break;
1549	>	V pv = (p == null) ? null : p.val;
1550	>	if ((val = mf.apply(k, pv)) != null) {
1551		if (p != null)
1552		p.val = val;
1553		else {
1554	<	count = 2;
1554	>	len = 2;
1555		delta = 1;
1556		t.putTreeNode(h, k, val);
1557		}
#	Line 1613 | Line 1564 | public class ConcurrentHashMapV8<K, V>
1564		} finally {
1565		t.release(0);
1566		}
1567	<	if (count != 0)
1567	>	if (len != 0)
1568		break;
1569		}
1570		else
1571	<	tab = (Node[])fk;
1621	<	}
1622	<	else if ((fh & LOCKED) != 0) {
1623	<	checkForResize();
1624	<	f.tryAwaitLock(tab, i);
1571	>	tab = (Node<V>[])fk;
1572		}
1573	<	else if (f.casHash(fh, fh | LOCKED)) {
1574	<	try {
1573	>	else {
1574	>	synchronized (f) {
1575		if (tabAt(tab, i) == f) {
1576	<	count = 1;
1577	<	for (Node e = f, pred = null;; ++count) {
1578	<	Object ek, ev;
1579	<	if ((e.hash & HASH_BITS) == h &&
1576	>	len = 1;
1577	>	for (Node<V> e = f, pred = null;; ++len) {
1578	>	Object ek; V ev;
1579	>	if (e.hash == h &&
1580		(ev = e.val) != null &&
1581		((ek = e.key) == k || k.equals(ek))) {
1582	<	val = mf.apply(k, (V)ev);
1582	>	val = mf.apply(k, ev);
1583		if (val != null)
1584		e.val = val;
1585		else {
1586		delta = -1;
1587	<	Node en = e.next;
1587	>	Node<V> en = e.next;
1588		if (pred != null)
1589		pred.next = en;
1590		else
#	Line 1647 | Line 1594 | public class ConcurrentHashMapV8<K, V>
1594		}
1595		pred = e;
1596		if ((e = e.next) == null) {
1597	<	if (!onlyIfPresent && (val = mf.apply(k, null)) != null) {
1598	<	pred.next = new Node(h, k, val, null);
1597	>	if (!onlyIfPresent &&
1598	>	(val = mf.apply(k, null)) != null) {
1599	>	pred.next = new Node<V>(h, k, val, null);
1600		delta = 1;
1601	<	if (count >= TREE_THRESHOLD)
1601	>	if (len >= TREE_THRESHOLD)
1602		replaceWithTreeBin(tab, i, k);
1603		}
1604		break;
1605		}
1606		}
1607		}
1660	–	} finally {
1661	–	if (!f.casHash(fh | LOCKED, fh)) {
1662	–	f.hash = fh;
1663	–	synchronized (f) { f.notifyAll(); };
1664	–	}
1608		}
1609	<	if (count != 0) {
1667	<	if (tab.length <= 64)
1668	<	count = 2;
1609	>	if (len != 0)
1610		break;
1670	–	}
1611		}
1612		}
1613	<	if (delta != 0) {
1614	<	counter.add((long)delta);
1675	<	if (count > 1)
1676	<	checkForResize();
1677	<	}
1613	>	if (delta != 0)
1614	>	addCount((long)delta, len);
1615		return val;
1616		}
1617
1618		/** Implementation for merge */
1619	<	@SuppressWarnings("unchecked") private final Object internalMerge
1619	>	@SuppressWarnings("unchecked") private final V internalMerge
1620		(K k, V v, BiFun<? super V, ? super V, ? extends V> mf) {
1621	+	if (k == null || v == null || mf == null)
1622	+	throw new NullPointerException();
1623		int h = spread(k.hashCode());
1624	<	Object val = null;
1624	>	V val = null;
1625		int delta = 0;
1626	<	int count = 0;
1627	<	for (Node[] tab = table;;) {
1628	<	int i; Node f; int fh; Object fk, fv;
1626	>	int len = 0;
1627	>	for (Node<V>[] tab = table;;) {
1628	>	int i; Node<V> f; Object fk; V fv;
1629		if (tab == null)
1630		tab = initTable();
1631		else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) {
1632	<	if (casTabAt(tab, i, null, new Node(h, k, v, null))) {
1632	>	if (casTabAt(tab, i, null, new Node<V>(h, k, v, null))) {
1633		delta = 1;
1634		val = v;
1635		break;
1636		}
1637		}
1638	<	else if ((fh = f.hash) == MOVED) {
1638	>	else if (f.hash < 0) {
1639		if ((fk = f.key) instanceof TreeBin) {
1640	<	TreeBin t = (TreeBin)fk;
1640	>	TreeBin<V> t = (TreeBin<V>)fk;
1641		t.acquire(0);
1642		try {
1643		if (tabAt(tab, i) == f) {
1644	<	count = 1;
1645	<	TreeNode p = t.getTreeNode(h, k, t.root);
1646	<	val = (p == null) ? v : mf.apply((V)p.val, v);
1644	>	len = 1;
1645	>	TreeNode<V> p = t.getTreeNode(h, k, t.root);
1646	>	val = (p == null) ? v : mf.apply(p.val, v);
1647		if (val != null) {
1648		if (p != null)
1649		p.val = val;
1650		else {
1651	<	count = 2;
1651	>	len = 2;
1652		delta = 1;
1653		t.putTreeNode(h, k, val);
1654		}
#	Line 1722 | Line 1661 | public class ConcurrentHashMapV8<K, V>
1661		} finally {
1662		t.release(0);
1663		}
1664	<	if (count != 0)
1664	>	if (len != 0)
1665		break;
1666		}
1667		else
1668	<	tab = (Node[])fk;
1730	<	}
1731	<	else if ((fh & LOCKED) != 0) {
1732	<	checkForResize();
1733	<	f.tryAwaitLock(tab, i);
1668	>	tab = (Node<V>[])fk;
1669		}
1670	<	else if (f.casHash(fh, fh | LOCKED)) {
1671	<	try {
1670	>	else {
1671	>	synchronized (f) {
1672		if (tabAt(tab, i) == f) {
1673	<	count = 1;
1674	<	for (Node e = f, pred = null;; ++count) {
1675	<	Object ek, ev;
1676	<	if ((e.hash & HASH_BITS) == h &&
1673	>	len = 1;
1674	>	for (Node<V> e = f, pred = null;; ++len) {
1675	>	Object ek; V ev;
1676	>	if (e.hash == h &&
1677		(ev = e.val) != null &&
1678		((ek = e.key) == k || k.equals(ek))) {
1679	<	val = mf.apply(v, (V)ev);
1679	>	val = mf.apply(ev, v);
1680		if (val != null)
1681		e.val = val;
1682		else {
1683		delta = -1;
1684	<	Node en = e.next;
1684	>	Node<V> en = e.next;
1685		if (pred != null)
1686		pred.next = en;
1687		else
#	Line 1757 | Line 1692 | public class ConcurrentHashMapV8<K, V>
1692		pred = e;
1693		if ((e = e.next) == null) {
1694		val = v;
1695	<	pred.next = new Node(h, k, val, null);
1695	>	pred.next = new Node<V>(h, k, val, null);
1696		delta = 1;
1697	<	if (count >= TREE_THRESHOLD)
1697	>	if (len >= TREE_THRESHOLD)
1698		replaceWithTreeBin(tab, i, k);
1699		break;
1700		}
1701		}
1702		}
1768	–	} finally {
1769	–	if (!f.casHash(fh | LOCKED, fh)) {
1770	–	f.hash = fh;
1771	–	synchronized (f) { f.notifyAll(); };
1772	–	}
1703		}
1704	<	if (count != 0) {
1775	<	if (tab.length <= 64)
1776	<	count = 2;
1704	>	if (len != 0)
1705		break;
1778	–	}
1706		}
1707		}
1708	<	if (delta != 0) {
1709	<	counter.add((long)delta);
1783	<	if (count > 1)
1784	<	checkForResize();
1785	<	}
1708	>	if (delta != 0)
1709	>	addCount((long)delta, len);
1710		return val;
1711		}
1712
1713		/** Implementation for putAll */
1714	<	private final void internalPutAll(Map<?, ?> m) {
1714	>	@SuppressWarnings("unchecked") private final void internalPutAll
1715	>	(Map<? extends K, ? extends V> m) {
1716		tryPresize(m.size());
1717		long delta = 0L;     // number of uncommitted additions
1718		boolean npe = false; // to throw exception on exit for nulls
1719		try {                // to clean up counts on other exceptions
1720	<	for (Map.Entry<?, ?> entry : m.entrySet()) {
1721	<	Object k, v;
1720	>	for (Map.Entry<?, ? extends V> entry : m.entrySet()) {
1721	>	Object k; V v;
1722		if (entry == null || (k = entry.getKey()) == null ||
1723		(v = entry.getValue()) == null) {
1724		npe = true;
1725		break;
1726		}
1727		int h = spread(k.hashCode());
1728	<	for (Node[] tab = table;;) {
1729	<	int i; Node f; int fh; Object fk;
1728	>	for (Node<V>[] tab = table;;) {
1729	>	int i; Node<V> f; int fh; Object fk;
1730		if (tab == null)
1731		tab = initTable();
1732		else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null){
1733	<	if (casTabAt(tab, i, null, new Node(h, k, v, null))) {
1733	>	if (casTabAt(tab, i, null, new Node<V>(h, k, v, null))) {
1734		++delta;
1735		break;
1736		}
1737		}
1738	<	else if ((fh = f.hash) == MOVED) {
1738	>	else if ((fh = f.hash) < 0) {
1739		if ((fk = f.key) instanceof TreeBin) {
1740	<	TreeBin t = (TreeBin)fk;
1740	>	TreeBin<V> t = (TreeBin<V>)fk;
1741		boolean validated = false;
1742		t.acquire(0);
1743		try {
1744		if (tabAt(tab, i) == f) {
1745		validated = true;
1746	<	TreeNode p = t.getTreeNode(h, k, t.root);
1746	>	TreeNode<V> p = t.getTreeNode(h, k, t.root);
1747		if (p != null)
1748		p.val = v;
1749		else {
#	Line 1833 | Line 1758 | public class ConcurrentHashMapV8<K, V>
1758		break;
1759		}
1760		else
1761	<	tab = (Node[])fk;
1761	>	tab = (Node<V>[])fk;
1762		}
1763	<	else if ((fh & LOCKED) != 0) {
1764	<	counter.add(delta);
1765	<	delta = 0L;
1841	<	checkForResize();
1842	<	f.tryAwaitLock(tab, i);
1843	<	}
1844	<	else if (f.casHash(fh, fh | LOCKED)) {
1845	<	int count = 0;
1846	<	try {
1763	>	else {
1764	>	int len = 0;
1765	>	synchronized (f) {
1766		if (tabAt(tab, i) == f) {
1767	<	count = 1;
1768	<	for (Node e = f;; ++count) {
1769	<	Object ek, ev;
1770	<	if ((e.hash & HASH_BITS) == h &&
1767	>	len = 1;
1768	>	for (Node<V> e = f;; ++len) {
1769	>	Object ek; V ev;
1770	>	if (e.hash == h &&
1771		(ev = e.val) != null &&
1772		((ek = e.key) == k || k.equals(ek))) {
1773		e.val = v;
1774		break;
1775		}
1776	<	Node last = e;
1776	>	Node<V> last = e;
1777		if ((e = e.next) == null) {
1778		++delta;
1779	<	last.next = new Node(h, k, v, null);
1780	<	if (count >= TREE_THRESHOLD)
1779	>	last.next = new Node<V>(h, k, v, null);
1780	>	if (len >= TREE_THRESHOLD)
1781		replaceWithTreeBin(tab, i, k);
1782		break;
1783		}
1784		}
1785		}
1867	–	} finally {
1868	–	if (!f.casHash(fh | LOCKED, fh)) {
1869	–	f.hash = fh;
1870	–	synchronized (f) { f.notifyAll(); };
1871	–	}
1786		}
1787	<	if (count != 0) {
1788	<	if (count > 1) {
1789	<	counter.add(delta);
1876	<	delta = 0L;
1877	<	checkForResize();
1878	<	}
1787	>	if (len != 0) {
1788	>	if (len > 1)
1789	>	addCount(delta, len);
1790		break;
1791		}
1792		}
1793		}
1794		}
1795		} finally {
1796	<	if (delta != 0)
1797	<	counter.add(delta);
1796	>	if (delta != 0L)
1797	>	addCount(delta, 2);
1798		}
1799		if (npe)
1800		throw new NullPointerException();
1801		}
1802
1803	+	/**
1804	+	* Implementation for clear. Steps through each bin, removing all
1805	+	* nodes.
1806	+	*/
1807	+	@SuppressWarnings("unchecked") private final void internalClear() {
1808	+	long delta = 0L; // negative number of deletions
1809	+	int i = 0;
1810	+	Node<V>[] tab = table;
1811	+	while (tab != null && i < tab.length) {
1812	+	Node<V> f = tabAt(tab, i);
1813	+	if (f == null)
1814	+	++i;
1815	+	else if (f.hash < 0) {
1816	+	Object fk;
1817	+	if ((fk = f.key) instanceof TreeBin) {
1818	+	TreeBin<V> t = (TreeBin<V>)fk;
1819	+	t.acquire(0);
1820	+	try {
1821	+	if (tabAt(tab, i) == f) {
1822	+	for (Node<V> p = t.first; p != null; p = p.next) {
1823	+	if (p.val != null) { // (currently always true)
1824	+	p.val = null;
1825	+	--delta;
1826	+	}
1827	+	}
1828	+	t.first = null;
1829	+	t.root = null;
1830	+	++i;
1831	+	}
1832	+	} finally {
1833	+	t.release(0);
1834	+	}
1835	+	}
1836	+	else
1837	+	tab = (Node<V>[])fk;
1838	+	}
1839	+	else {
1840	+	synchronized (f) {
1841	+	if (tabAt(tab, i) == f) {
1842	+	for (Node<V> e = f; e != null; e = e.next) {
1843	+	if (e.val != null) {  // (currently always true)
1844	+	e.val = null;
1845	+	--delta;
1846	+	}
1847	+	}
1848	+	setTabAt(tab, i, null);
1849	+	++i;
1850	+	}
1851	+	}
1852	+	}
1853	+	}
1854	+	if (delta != 0L)
1855	+	addCount(delta, -1);
1856	+	}
1857	+
1858		/* ---------------- Table Initialization and Resizing -------------- */
1859
1860		/**
#	Line 1908 | Line 1874 | public class ConcurrentHashMapV8<K, V>
1874		/**
1875		* Initializes table, using the size recorded in sizeCtl.
1876		*/
1877	<	private final Node[] initTable() {
1878	<	Node[] tab; int sc;
1877	>	@SuppressWarnings("unchecked") private final Node<V>[] initTable() {
1878	>	Node<V>[] tab; int sc;
1879		while ((tab = table) == null) {
1880		if ((sc = sizeCtl) < 0)
1881		Thread.yield(); // lost initialization race; just spin
1882	<	else if (UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) {
1882	>	else if (U.compareAndSwapInt(this, SIZECTL, sc, -1)) {
1883		try {
1884		if ((tab = table) == null) {
1885		int n = (sc > 0) ? sc : DEFAULT_CAPACITY;
1886	<	tab = table = new Node[n];
1886	>	@SuppressWarnings("rawtypes") Node[] tb = new Node[n];
1887	>	table = tab = (Node<V>[])tb;
1888		sc = n - (n >>> 2);
1889		}
1890		} finally {
#	Line 1930 | Line 1897 | public class ConcurrentHashMapV8<K, V>
1897		}
1898
1899		/**
1900	<	* If table is too small and not already resizing, creates next
1901	<	* table and transfers bins.  Rechecks occupancy after a transfer
1902	<	* to see if another resize is already needed because resizings
1903	<	* are lagging additions.
1904	<	*/
1905	<	private final void checkForResize() {
1906	<	Node[] tab; int n, sc;
1907	<	while ((tab = table) != null &&
1908	<	(n = tab.length) < MAXIMUM_CAPACITY &&
1909	<	(sc = sizeCtl) >= 0 && counter.sum() >= (long)sc &&
1910	<	UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) {
1911	<	try {
1912	<	if (tab == table) {
1913	<	table = rebuild(tab);
1914	<	sc = (n << 1) - (n >>> 1);
1900	>	* Adds to count, and if table is too small and not already
1901	>	* resizing, initiates transfer. If already resizing, helps
1902	>	* perform transfer if work is available.  Rechecks occupancy
1903	>	* after a transfer to see if another resize is already needed
1904	>	* because resizings are lagging additions.
1905	>	*
1906	>	* @param x the count to add
1907	>	* @param check if <0, don't check resize, if <= 1 only check if uncontended
1908	>	*/
1909	>	private final void addCount(long x, int check) {
1910	>	CounterCell[] as; long b, s;
1911	>	if ((as = counterCells) != null ||
1912	>	!U.compareAndSwapLong(this, BASECOUNT, b = baseCount, s = b + x)) {
1913	>	CounterHashCode hc; CounterCell a; long v; int m;
1914	>	boolean uncontended = true;
1915	>	if ((hc = threadCounterHashCode.get()) == null ||
1916	>	as == null || (m = as.length - 1) < 0 ||
1917	>	(a = as[m & hc.code]) == null ||
1918	>	!(uncontended =
1919	>	U.compareAndSwapLong(a, CELLVALUE, v = a.value, v + x))) {
1920	>	fullAddCount(x, hc, uncontended);
1921	>	return;
1922	>	}
1923	>	if (check <= 1)
1924	>	return;
1925	>	s = sumCount();
1926	>	}
1927	>	if (check >= 0) {
1928	>	Node<V>[] tab, nt; int sc;
1929	>	while (s >= (long)(sc = sizeCtl) && (tab = table) != null &&
1930	>	tab.length < MAXIMUM_CAPACITY) {
1931	>	if (sc < 0) {
1932	>	if (sc == -1 || transferIndex <= transferOrigin ||
1933	>	(nt = nextTable) == null)
1934	>	break;
1935	>	if (U.compareAndSwapInt(this, SIZECTL, sc, sc - 1))
1936	>	transfer(tab, nt);
1937		}
1938	<	} finally {
1939	<	sizeCtl = sc;
1938	>	else if (U.compareAndSwapInt(this, SIZECTL, sc, -2))
1939	>	transfer(tab, null);
1940	>	s = sumCount();
1941		}
1942		}
1943		}
#	Line 1957 | Line 1947 | public class ConcurrentHashMapV8<K, V>
1947		*
1948		* @param size number of elements (doesn't need to be perfectly accurate)
1949		*/
1950	<	private final void tryPresize(int size) {
1950	>	@SuppressWarnings("unchecked") private final void tryPresize(int size) {
1951		int c = (size >= (MAXIMUM_CAPACITY >>> 1)) ? MAXIMUM_CAPACITY :
1952		tableSizeFor(size + (size >>> 1) + 1);
1953		int sc;
1954		while ((sc = sizeCtl) >= 0) {
1955	<	Node[] tab = table; int n;
1955	>	Node<V>[] tab = table; int n;
1956		if (tab == null || (n = tab.length) == 0) {
1957		n = (sc > c) ? sc : c;
1958	<	if (UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) {
1958	>	if (U.compareAndSwapInt(this, SIZECTL, sc, -1)) {
1959		try {
1960		if (table == tab) {
1961	<	table = new Node[n];
1961	>	@SuppressWarnings("rawtypes") Node[] tb = new Node[n];
1962	>	table = (Node<V>[])tb;
1963		sc = n - (n >>> 2);
1964		}
1965		} finally {
#	Line 1978 | Line 1969 | public class ConcurrentHashMapV8<K, V>
1969		}
1970		else if (c <= sc || n >= MAXIMUM_CAPACITY)
1971		break;
1972	<	else if (UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) {
1973	<	try {
1974	<	if (table == tab) {
1984	<	table = rebuild(tab);
1985	<	sc = (n << 1) - (n >>> 1);
1986	<	}
1987	<	} finally {
1988	<	sizeCtl = sc;
1989	<	}
1990	<	}
1972	>	else if (tab == table &&
1973	>	U.compareAndSwapInt(this, SIZECTL, sc, -2))
1974	>	transfer(tab, null);
1975		}
1976		}
1977
1978		/*
1979		* Moves and/or copies the nodes in each bin to new table. See
1980		* above for explanation.
1997	–	*
1998	–	* @return the new table
1981		*/
1982	<	private static final Node[] rebuild(Node[] tab) {
1983	<	int n = tab.length;
1984	<	Node[] nextTab = new Node[n << 1];
1985	<	Node fwd = new Node(MOVED, nextTab, null, null);
1986	<	int[] buffer = null;       // holds bins to revisit; null until needed
1987	<	Node rev = null;           // reverse forwarder; null until needed
1988	<	int nbuffered = 0;         // the number of bins in buffer list
1989	<	int bufferIndex = 0;       // buffer index of current buffered bin
1990	<	int bin = n - 1;           // current non-buffered bin or -1 if none
1991	<
1992	<	for (int i = bin;;) {      // start upwards sweep
1993	<	int fh; Node f;
1994	<	if ((f = tabAt(tab, i)) == null) {
1995	<	if (bin >= 0) {    // Unbuffered; no lock needed (or available)
1996	<	if (!casTabAt(tab, i, f, fwd))
1997	<	continue;
1998	<	}
1999	<	else {             // transiently use a locked forwarding node
2000	<	Node g = new Node(MOVED|LOCKED, nextTab, null, null);
2001	<	if (!casTabAt(tab, i, f, g))
2002	<	continue;
1982	>	@SuppressWarnings("unchecked") private final void transfer
1983	>	(Node<V>[] tab, Node<V>[] nextTab) {
1984	>	int n = tab.length, stride;
1985	>	if ((stride = (NCPU > 1) ? (n >>> 3) / NCPU : n) < MIN_TRANSFER_STRIDE)
1986	>	stride = MIN_TRANSFER_STRIDE; // subdivide range
1987	>	if (nextTab == null) {            // initiating
1988	>	try {
1989	>	@SuppressWarnings("rawtypes") Node[] tb = new Node[n << 1];
1990	>	nextTab = (Node<V>[])tb;
1991	>	} catch (Throwable ex) {      // try to cope with OOME
1992	>	sizeCtl = Integer.MAX_VALUE;
1993	>	return;
1994	>	}
1995	>	nextTable = nextTab;
1996	>	transferOrigin = n;
1997	>	transferIndex = n;
1998	>	Node<V> rev = new Node<V>(MOVED, tab, null, null);
1999	>	for (int k = n; k > 0;) {    // progressively reveal ready slots
2000	>	int nextk = (k > stride) ? k - stride : 0;
2001	>	for (int m = nextk; m < k; ++m)
2002	>	nextTab[m] = rev;
2003	>	for (int m = n + nextk; m < n + k; ++m)
2004	>	nextTab[m] = rev;
2005	>	U.putOrderedInt(this, TRANSFERORIGIN, k = nextk);
2006	>	}
2007	>	}
2008	>	int nextn = nextTab.length;
2009	>	Node<V> fwd = new Node<V>(MOVED, nextTab, null, null);
2010	>	boolean advance = true;
2011	>	for (int i = 0, bound = 0;;) {
2012	>	int nextIndex, nextBound; Node<V> f; Object fk;
2013	>	while (advance) {
2014	>	if (--i >= bound)
2015	>	advance = false;
2016	>	else if ((nextIndex = transferIndex) <= transferOrigin) {
2017	>	i = -1;
2018	>	advance = false;
2019	>	}
2020	>	else if (U.compareAndSwapInt
2021	>	(this, TRANSFERINDEX, nextIndex,
2022	>	nextBound = (nextIndex > stride ?
2023	>	nextIndex - stride : 0))) {
2024	>	bound = nextBound;
2025	>	i = nextIndex - 1;
2026	>	advance = false;
2027	>	}
2028	>	}
2029	>	if (i < 0 || i >= n || i + n >= nextn) {
2030	>	for (int sc;;) {
2031	>	if (U.compareAndSwapInt(this, SIZECTL, sc = sizeCtl, ++sc)) {
2032	>	if (sc == -1) {
2033	>	nextTable = null;
2034	>	table = nextTab;
2035	>	sizeCtl = (n << 1) - (n >>> 1);
2036	>	}
2037	>	return;
2038	>	}
2039	>	}
2040	>	}
2041	>	else if ((f = tabAt(tab, i)) == null) {
2042	>	if (casTabAt(tab, i, null, fwd)) {
2043		setTabAt(nextTab, i, null);
2044		setTabAt(nextTab, i + n, null);
2045	<	setTabAt(tab, i, fwd);
2024	<	if (!g.casHash(MOVED|LOCKED, MOVED)) {
2025	<	g.hash = MOVED;
2026	<	synchronized (g) { g.notifyAll(); }
2027	<	}
2045	>	advance = true;
2046		}
2047		}
2048	<	else if ((fh = f.hash) == MOVED) {
2049	<	Object fk = f.key;
2050	<	if (fk instanceof TreeBin) {
2051	<	TreeBin t = (TreeBin)fk;
2052	<	boolean validated = false;
2053	<	t.acquire(0);
2054	<	try {
2055	<	if (tabAt(tab, i) == f) {
2056	<	validated = true;
2057	<	splitTreeBin(nextTab, i, t);
2058	<	setTabAt(tab, i, fwd);
2048	>	else if (f.hash >= 0) {
2049	>	synchronized (f) {
2050	>	if (tabAt(tab, i) == f) {
2051	>	int runBit = f.hash & n;
2052	>	Node<V> lastRun = f, lo = null, hi = null;
2053	>	for (Node<V> p = f.next; p != null; p = p.next) {
2054	>	int b = p.hash & n;
2055	>	if (b != runBit) {
2056	>	runBit = b;
2057	>	lastRun = p;
2058	>	}
2059		}
2060	<	} finally {
2061	<	t.release(0);
2060	>	if (runBit == 0)
2061	>	lo = lastRun;
2062	>	else
2063	>	hi = lastRun;
2064	>	for (Node<V> p = f; p != lastRun; p = p.next) {
2065	>	int ph = p.hash;
2066	>	Object pk = p.key; V pv = p.val;
2067	>	if ((ph & n) == 0)
2068	>	lo = new Node<V>(ph, pk, pv, lo);
2069	>	else
2070	>	hi = new Node<V>(ph, pk, pv, hi);
2071	>	}
2072	>	setTabAt(nextTab, i, lo);
2073	>	setTabAt(nextTab, i + n, hi);
2074	>	setTabAt(tab, i, fwd);
2075	>	advance = true;
2076		}
2045	–	if (!validated)
2046	–	continue;
2077		}
2078		}
2079	<	else if ((fh & LOCKED) == 0 && f.casHash(fh, fh|LOCKED)) {
2080	<	boolean validated = false;
2081	<	try {              // split to lo and hi lists; copying as needed
2079	>	else if ((fk = f.key) instanceof TreeBin) {
2080	>	TreeBin<V> t = (TreeBin<V>)fk;
2081	>	t.acquire(0);
2082	>	try {
2083		if (tabAt(tab, i) == f) {
2084	<	validated = true;
2085	<	splitBin(nextTab, i, f);
2084	>	TreeBin<V> lt = new TreeBin<V>();
2085	>	TreeBin<V> ht = new TreeBin<V>();
2086	>	int lc = 0, hc = 0;
2087	>	for (Node<V> e = t.first; e != null; e = e.next) {
2088	>	int h = e.hash;
2089	>	Object k = e.key; V v = e.val;
2090	>	if ((h & n) == 0) {
2091	>	++lc;
2092	>	lt.putTreeNode(h, k, v);
2093	>	}
2094	>	else {
2095	>	++hc;
2096	>	ht.putTreeNode(h, k, v);
2097	>	}
2098	>	}
2099	>	Node<V> ln, hn; // throw away trees if too small
2100	>	if (lc < TREE_THRESHOLD) {
2101	>	ln = null;
2102	>	for (Node<V> p = lt.first; p != null; p = p.next)
2103	>	ln = new Node<V>(p.hash, p.key, p.val, ln);
2104	>	}
2105	>	else
2106	>	ln = new Node<V>(MOVED, lt, null, null);
2107	>	setTabAt(nextTab, i, ln);
2108	>	if (hc < TREE_THRESHOLD) {
2109	>	hn = null;
2110	>	for (Node<V> p = ht.first; p != null; p = p.next)
2111	>	hn = new Node<V>(p.hash, p.key, p.val, hn);
2112	>	}
2113	>	else
2114	>	hn = new Node<V>(MOVED, ht, null, null);
2115	>	setTabAt(nextTab, i + n, hn);
2116		setTabAt(tab, i, fwd);
2117	+	advance = true;
2118		}
2119		} finally {
2120	<	if (!f.casHash(fh | LOCKED, fh)) {
2059	<	f.hash = fh;
2060	<	synchronized (f) { f.notifyAll(); };
2061	<	}
2120	>	t.release(0);
2121		}
2063	–	if (!validated)
2064	–	continue;
2065	–	}
2066	–	else {
2067	–	if (buffer == null) // initialize buffer for revisits
2068	–	buffer = new int[TRANSFER_BUFFER_SIZE];
2069	–	if (bin < 0 && bufferIndex > 0) {
2070	–	int j = buffer[--bufferIndex];
2071	–	buffer[bufferIndex] = i;
2072	–	i = j;         // swap with another bin
2073	–	continue;
2074	–	}
2075	–	if (bin < 0 || nbuffered >= TRANSFER_BUFFER_SIZE) {
2076	–	f.tryAwaitLock(tab, i);
2077	–	continue;      // no other options -- block
2078	–	}
2079	–	if (rev == null)   // initialize reverse-forwarder
2080	–	rev = new Node(MOVED, tab, null, null);
2081	–	if (tabAt(tab, i) != f || (f.hash & LOCKED) == 0)
2082	–	continue;      // recheck before adding to list
2083	–	buffer[nbuffered++] = i;
2084	–	setTabAt(nextTab, i, rev);     // install place-holders
2085	–	setTabAt(nextTab, i + n, rev);
2086	–	}
2087	–
2088	–	if (bin > 0)
2089	–	i = --bin;
2090	–	else if (buffer != null && nbuffered > 0) {
2091	–	bin = -1;
2092	–	i = buffer[bufferIndex = --nbuffered];
2122		}
2123		else
2124	<	return nextTab;
2124	>	advance = true; // already processed
2125		}
2126		}
2127
2128	<	/**
2129	<	* Splits a normal bin with list headed by e into lo and hi parts;
2130	<	* installs in given table.
2131	<	*/
2132	<	private static void splitBin(Node[] nextTab, int i, Node e) {
2133	<	int bit = nextTab.length >>> 1; // bit to split on
2134	<	int runBit = e.hash & bit;
2135	<	Node lastRun = e, lo = null, hi = null;
2136	<	for (Node p = e.next; p != null; p = p.next) {
2108	<	int b = p.hash & bit;
2109	<	if (b != runBit) {
2110	<	runBit = b;
2111	<	lastRun = p;
2128	>	/* ---------------- Counter support -------------- */
2129	>
2130	>	final long sumCount() {
2131	>	CounterCell[] as = counterCells; CounterCell a;
2132	>	long sum = baseCount;
2133	>	if (as != null) {
2134	>	for (int i = 0; i < as.length; ++i) {
2135	>	if ((a = as[i]) != null)
2136	>	sum += a.value;
2137		}
2138		}
2139	<	if (runBit == 0)
2115	<	lo = lastRun;
2116	<	else
2117	<	hi = lastRun;
2118	<	for (Node p = e; p != lastRun; p = p.next) {
2119	<	int ph = p.hash & HASH_BITS;
2120	<	Object pk = p.key, pv = p.val;
2121	<	if ((ph & bit) == 0)
2122	<	lo = new Node(ph, pk, pv, lo);
2123	<	else
2124	<	hi = new Node(ph, pk, pv, hi);
2125	<	}
2126	<	setTabAt(nextTab, i, lo);
2127	<	setTabAt(nextTab, i + bit, hi);
2139	>	return sum;
2140		}
2141
2142	<	/**
2143	<	* Splits a tree bin into lo and hi parts; installs in given table.
2144	<	*/
2145	<	private static void splitTreeBin(Node[] nextTab, int i, TreeBin t) {
2146	<	int bit = nextTab.length >>> 1;
2147	<	TreeBin lt = new TreeBin();
2148	<	TreeBin ht = new TreeBin();
2149	<	int lc = 0, hc = 0;
2150	<	for (Node e = t.first; e != null; e = e.next) {
2139	<	int h = e.hash & HASH_BITS;
2140	<	Object k = e.key, v = e.val;
2141	<	if ((h & bit) == 0) {
2142	<	++lc;
2143	<	lt.putTreeNode(h, k, v);
2144	<	}
2145	<	else {
2146	<	++hc;
2147	<	ht.putTreeNode(h, k, v);
2148	<	}
2149	<	}
2150	<	Node ln, hn; // throw away trees if too small
2151	<	if (lc <= (TREE_THRESHOLD >>> 1)) {
2152	<	ln = null;
2153	<	for (Node p = lt.first; p != null; p = p.next)
2154	<	ln = new Node(p.hash, p.key, p.val, ln);
2155	<	}
2156	<	else
2157	<	ln = new Node(MOVED, lt, null, null);
2158	<	setTabAt(nextTab, i, ln);
2159	<	if (hc <= (TREE_THRESHOLD >>> 1)) {
2160	<	hn = null;
2161	<	for (Node p = ht.first; p != null; p = p.next)
2162	<	hn = new Node(p.hash, p.key, p.val, hn);
2142	>	// See LongAdder version for explanation
2143	>	private final void fullAddCount(long x, CounterHashCode hc,
2144	>	boolean wasUncontended) {
2145	>	int h;
2146	>	if (hc == null) {
2147	>	hc = new CounterHashCode();
2148	>	int s = counterHashCodeGenerator.addAndGet(SEED_INCREMENT);
2149	>	h = hc.code = (s == 0) ? 1 : s; // Avoid zero
2150	>	threadCounterHashCode.set(hc);
2151		}
2152		else
2153	<	hn = new Node(MOVED, ht, null, null);
2154	<	setTabAt(nextTab, i + bit, hn);
2155	<	}
2156	<
2157	<	/**
2158	<	* Implementation for clear. Steps through each bin, removing all
2159	<	* nodes.
2160	<	*/
2161	<	private final void internalClear() {
2162	<	long delta = 0L; // negative number of deletions
2163	<	int i = 0;
2164	<	Node[] tab = table;
2165	<	while (tab != null && i < tab.length) {
2166	<	int fh; Object fk;
2167	<	Node f = tabAt(tab, i);
2168	<	if (f == null)
2169	<	++i;
2170	<	else if ((fh = f.hash) == MOVED) {
2183	<	if ((fk = f.key) instanceof TreeBin) {
2184	<	TreeBin t = (TreeBin)fk;
2185	<	t.acquire(0);
2186	<	try {
2187	<	if (tabAt(tab, i) == f) {
2188	<	for (Node p = t.first; p != null; p = p.next) {
2189	<	if (p.val != null) { // (currently always true)
2190	<	p.val = null;
2191	<	--delta;
2153	>	h = hc.code;
2154	>	boolean collide = false;                // True if last slot nonempty
2155	>	for (;;) {
2156	>	CounterCell[] as; CounterCell a; int n; long v;
2157	>	if ((as = counterCells) != null && (n = as.length) > 0) {
2158	>	if ((a = as[(n - 1) & h]) == null) {
2159	>	if (counterBusy == 0) {            // Try to attach new Cell
2160	>	CounterCell r = new CounterCell(x); // Optimistic create
2161	>	if (counterBusy == 0 &&
2162	>	U.compareAndSwapInt(this, COUNTERBUSY, 0, 1)) {
2163	>	boolean created = false;
2164	>	try {               // Recheck under lock
2165	>	CounterCell[] rs; int m, j;
2166	>	if ((rs = counterCells) != null &&
2167	>	(m = rs.length) > 0 &&
2168	>	rs[j = (m - 1) & h] == null) {
2169	>	rs[j] = r;
2170	>	created = true;
2171		}
2172	+	} finally {
2173	+	counterBusy = 0;
2174		}
2175	<	t.first = null;
2176	<	t.root = null;
2177	<	++i;
2175	>	if (created)
2176	>	break;
2177	>	continue;           // Slot is now non-empty
2178		}
2198	–	} finally {
2199	–	t.release(0);
2179		}
2180	+	collide = false;
2181		}
2182	<	else
2183	<	tab = (Node[])fk;
2184	<	}
2185	<	else if ((fh & LOCKED) != 0) {
2186	<	counter.add(delta); // opportunistically update count
2187	<	delta = 0L;
2188	<	f.tryAwaitLock(tab, i);
2189	<	}
2190	<	else if (f.casHash(fh, fh | LOCKED)) {
2191	<	try {
2192	<	if (tabAt(tab, i) == f) {
2193	<	for (Node e = f; e != null; e = e.next) {
2194	<	if (e.val != null) {  // (currently always true)
2195	<	e.val = null;
2196	<	--delta;
2197	<	}
2182	>	else if (!wasUncontended)       // CAS already known to fail
2183	>	wasUncontended = true;      // Continue after rehash
2184	>	else if (U.compareAndSwapLong(a, CELLVALUE, v = a.value, v + x))
2185	>	break;
2186	>	else if (counterCells != as || n >= NCPU)
2187	>	collide = false;            // At max size or stale
2188	>	else if (!collide)
2189	>	collide = true;
2190	>	else if (counterBusy == 0 &&
2191	>	U.compareAndSwapInt(this, COUNTERBUSY, 0, 1)) {
2192	>	try {
2193	>	if (counterCells == as) {// Expand table unless stale
2194	>	CounterCell[] rs = new CounterCell[n << 1];
2195	>	for (int i = 0; i < n; ++i)
2196	>	rs[i] = as[i];
2197	>	counterCells = rs;
2198		}
2199	<	setTabAt(tab, i, null);
2200	<	++i;
2199	>	} finally {
2200	>	counterBusy = 0;
2201		}
2202	<	} finally {
2203	<	if (!f.casHash(fh | LOCKED, fh)) {
2204	<	f.hash = fh;
2205	<	synchronized (f) { f.notifyAll(); };
2202	>	collide = false;
2203	>	continue;                   // Retry with expanded table
2204	>	}
2205	>	h ^= h << 13;                   // Rehash
2206	>	h ^= h >>> 17;
2207	>	h ^= h << 5;
2208	>	}
2209	>	else if (counterBusy == 0 && counterCells == as &&
2210	>	U.compareAndSwapInt(this, COUNTERBUSY, 0, 1)) {
2211	>	boolean init = false;
2212	>	try {                           // Initialize table
2213	>	if (counterCells == as) {
2214	>	CounterCell[] rs = new CounterCell[2];
2215	>	rs[h & 1] = new CounterCell(x);
2216	>	counterCells = rs;
2217	>	init = true;
2218		}
2219	+	} finally {
2220	+	counterBusy = 0;
2221		}
2222	+	if (init)
2223	+	break;
2224		}
2225	+	else if (U.compareAndSwapLong(this, BASECOUNT, v = baseCount, v + x))
2226	+	break;                          // Fall back on using base
2227		}
2228	<	if (delta != 0)
2231	<	counter.add(delta);
2228	>	hc.code = h;                            // Record index for next time
2229		}
2230
2231		/* ----------------Table Traversal -------------- */
#	Line 2243 | Line 2240 | public class ConcurrentHashMapV8<K, V>
2240		* change (including to null, indicating deletion), field nextVal
2241		* might not be accurate at point of use, but still maintains the
2242		* weak consistency property of holding a value that was once
2243	<	* valid.
2243	>	* valid. To support iterator.remove, the nextKey field is not
2244	>	* updated (nulled out) when the iterator cannot advance.
2245		*
2246		* Internal traversals directly access these fields, as in:
2247		* {@code while (it.advance() != null) { process(it.nextKey); }}
#	Line 2270 | Line 2268 | public class ConcurrentHashMapV8<K, V>
2268		* across threads, iteration terminates if a bounds checks fails
2269		* for a table read.
2270		*
2271	<	* This class extends ForkJoinTask to streamline parallel
2272	<	* iteration in bulk operations (see BulkTask). This adds only an
2273	<	* int of space overhead, which is close enough to negligible in
2274	<	* cases where it is not needed to not worry about it.  Because
2275	<	* ForkJoinTask is Serializable, but iterators need not be, we
2276	<	* need to add warning suppressions.
2271	>	* This class extends CountedCompleter to streamline parallel
2272	>	* iteration in bulk operations. This adds only a few fields of
2273	>	* space overhead, which is small enough in cases where it is not
2274	>	* needed to not worry about it.  Because CountedCompleter is
2275	>	* Serializable, but iterators need not be, we need to add warning
2276	>	* suppressions.
2277		*/
2278	<	@SuppressWarnings("serial") static class Traverser<K,V,R> extends ForkJoinTask<R> {
2278	>	@SuppressWarnings("serial") static class Traverser<K,V,R>
2279	>	extends CountedCompleter<R> {
2280		final ConcurrentHashMapV8<K, V> map;
2281	<	Node next;           // the next entry to use
2283	<	Node last;           // the last entry used
2281	>	Node<V> next;        // the next entry to use
2282		Object nextKey;      // cached key field of next
2283	<	Object nextVal;      // cached val field of next
2284	<	Node[] tab;          // current table; updated if resized
2283	>	V nextVal;           // cached val field of next
2284	>	Node<V>[] tab;       // current table; updated if resized
2285		int index;           // index of bin to use next
2286		int baseIndex;       // current index of initial table
2287		int baseLimit;       // index bound for initial table
2288		int baseSize;        // initial table size
2289	+	int batch;           // split control
2290
2291		/** Creates iterator for all entries in the table. */
2292		Traverser(ConcurrentHashMapV8<K, V> map) {
2293		this.map = map;
2294		}
2295
2296	<	/** Creates iterator for split() methods */
2297	<	Traverser(Traverser<K,V,?> it) {
2298	<	ConcurrentHashMapV8<K, V> m; Node[] t;
2299	<	if ((m = this.map = it.map) == null)
2300	<	t = null;
2301	<	else if ((t = it.tab) == null && // force parent tab initialization
2302	<	(t = it.tab = m.table) != null)
2303	<	it.baseLimit = it.baseSize = t.length;
2304	<	this.tab = t;
2305	<	this.baseSize = it.baseSize;
2306	<	it.baseLimit = this.index = this.baseIndex =
2307	<	((this.baseLimit = it.baseLimit) + it.baseIndex + 1) >>> 1;
2296	>	/** Creates iterator for split() methods and task constructors */
2297	>	Traverser(ConcurrentHashMapV8<K,V> map, Traverser<K,V,?> it, int batch) {
2298	>	super(it);
2299	>	this.batch = batch;
2300	>	if ((this.map = map) != null && it != null) { // split parent
2301	>	Node<V>[] t;
2302	>	if ((t = it.tab) == null &&
2303	>	(t = it.tab = map.table) != null)
2304	>	it.baseLimit = it.baseSize = t.length;
2305	>	this.tab = t;
2306	>	this.baseSize = it.baseSize;
2307	>	int hi = this.baseLimit = it.baseLimit;
2308	>	it.baseLimit = this.index = this.baseIndex =
2309	>	(hi + it.baseIndex + 1) >>> 1;
2310	>	}
2311		}
2312
2313		/**
2314		* Advances next; returns nextVal or null if terminated.
2315		* See above for explanation.
2316		*/
2317	<	final Object advance() {
2318	<	Node e = last = next;
2319	<	Object ev = null;
2317	>	@SuppressWarnings("unchecked") final V advance() {
2318	>	Node<V> e = next;
2319	>	V ev = null;
2320		outer: do {
2321		if (e != null)                  // advance past used/skipped node
2322		e = e.next;
2323		while (e == null) {             // get to next non-null bin
2324		ConcurrentHashMapV8<K, V> m;
2325	<	Node[] t; int b, i, n; Object ek; // checks must use locals
2325	>	Node<V>[] t; int b, i, n; Object ek; //  must use locals
2326		if ((t = tab) != null)
2327		n = t.length;
2328		else if ((m = map) != null && (t = tab = m.table) != null)
#	Line 2330 | Line 2332 | public class ConcurrentHashMapV8<K, V>
2332		if ((b = baseIndex) >= baseLimit ||
2333		(i = index) < 0 || i >= n)
2334		break outer;
2335	<	if ((e = tabAt(t, i)) != null && e.hash == MOVED) {
2335	>	if ((e = tabAt(t, i)) != null && e.hash < 0) {
2336		if ((ek = e.key) instanceof TreeBin)
2337	<	e = ((TreeBin)ek).first;
2337	>	e = ((TreeBin<V>)ek).first;
2338		else {
2339	<	tab = (Node[])ek;
2339	>	tab = (Node<V>[])ek;
2340		continue;           // restarts due to null val
2341		}
2342		}                           // visit upper slots if present
#	Line 2347 | Line 2349 | public class ConcurrentHashMapV8<K, V>
2349		}
2350
2351		public final void remove() {
2352	<	if (nextVal == null && last == null)
2353	<	advance();
2352	<	Node e = last;
2353	<	if (e == null)
2352	>	Object k = nextKey;
2353	>	if (k == null && (advance() == null || (k = nextKey) == null))
2354		throw new IllegalStateException();
2355	<	last = null;
2356	<	map.remove(e.key);
2355	>	map.internalReplace(k, null, null);
2356		}
2357
2358		public final boolean hasNext() {
#	Line 2361 | Line 2360 | public class ConcurrentHashMapV8<K, V>
2360		}
2361
2362		public final boolean hasMoreElements() { return hasNext(); }
2363	<	public final void setRawResult(Object x) { }
2364	<	public R getRawResult() { return null; }
2365	<	public boolean exec() { return true; }
2363	>
2364	>	public void compute() { } // default no-op CountedCompleter body
2365	>
2366	>	/**
2367	>	* Returns a batch value > 0 if this task should (and must) be
2368	>	* split, if so, adding to pending count, and in any case
2369	>	* updating batch value. The initial batch value is approx
2370	>	* exp2 of the number of times (minus one) to split task by
2371	>	* two before executing leaf action. This value is faster to
2372	>	* compute and more convenient to use as a guide to splitting
2373	>	* than is the depth, since it is used while dividing by two
2374	>	* anyway.
2375	>	*/
2376	>	final int preSplit() {
2377	>	ConcurrentHashMapV8<K, V> m; int b; Node<V>[] t;  ForkJoinPool pool;
2378	>	if ((b = batch) < 0 && (m = map) != null) { // force initialization
2379	>	if ((t = tab) == null && (t = tab = m.table) != null)
2380	>	baseLimit = baseSize = t.length;
2381	>	if (t != null) {
2382	>	long n = m.sumCount();
2383	>	int par = ((pool = getPool()) == null) ?
2384	>	ForkJoinPool.getCommonPoolParallelism() :
2385	>	pool.getParallelism();
2386	>	int sp = par << 3; // slack of 8
2387	>	b = (n <= 0L) ? 0 : (n < (long)sp) ? (int)n : sp;
2388	>	}
2389	>	}
2390	>	b = (b <= 1 || baseIndex == baseLimit) ? 0 : (b >>> 1);
2391	>	if ((batch = b) > 0)
2392	>	addToPendingCount(1);
2393	>	return b;
2394	>	}
2395	>
2396		}
2397
2398		/* ---------------- Public operations -------------- */
#	Line 2372 | Line 2401 | public class ConcurrentHashMapV8<K, V>
2401		* Creates a new, empty map with the default initial table size (16).
2402		*/
2403		public ConcurrentHashMapV8() {
2375	–	this.counter = new LongAdder();
2404		}
2405
2406		/**
#	Line 2391 | Line 2419 | public class ConcurrentHashMapV8<K, V>
2419		int cap = ((initialCapacity >= (MAXIMUM_CAPACITY >>> 1)) ?
2420		MAXIMUM_CAPACITY :
2421		tableSizeFor(initialCapacity + (initialCapacity >>> 1) + 1));
2394	–	this.counter = new LongAdder();
2422		this.sizeCtl = cap;
2423		}
2424
#	Line 2401 | Line 2428 | public class ConcurrentHashMapV8<K, V>
2428		* @param m the map
2429		*/
2430		public ConcurrentHashMapV8(Map<? extends K, ? extends V> m) {
2404	–	this.counter = new LongAdder();
2431		this.sizeCtl = DEFAULT_CAPACITY;
2432		internalPutAll(m);
2433		}
#	Line 2452 | Line 2478 | public class ConcurrentHashMapV8<K, V>
2478		long size = (long)(1.0 + (long)initialCapacity / loadFactor);
2479		int cap = (size >= (long)MAXIMUM_CAPACITY) ?
2480		MAXIMUM_CAPACITY : tableSizeFor((int)size);
2455	–	this.counter = new LongAdder();
2481		this.sizeCtl = cap;
2482		}
2483
2484		/**
2485	+	* Creates a new {@link Set} backed by a ConcurrentHashMapV8
2486	+	* from the given type to {@code Boolean.TRUE}.
2487	+	*
2488	+	* @return the new set
2489	+	*/
2490	+	public static <K> KeySetView<K,Boolean> newKeySet() {
2491	+	return new KeySetView<K,Boolean>(new ConcurrentHashMapV8<K,Boolean>(),
2492	+	Boolean.TRUE);
2493	+	}
2494	+
2495	+	/**
2496	+	* Creates a new {@link Set} backed by a ConcurrentHashMapV8
2497	+	* from the given type to {@code Boolean.TRUE}.
2498	+	*
2499	+	* @param initialCapacity The implementation performs internal
2500	+	* sizing to accommodate this many elements.
2501	+	* @throws IllegalArgumentException if the initial capacity of
2502	+	* elements is negative
2503	+	* @return the new set
2504	+	*/
2505	+	public static <K> KeySetView<K,Boolean> newKeySet(int initialCapacity) {
2506	+	return new KeySetView<K,Boolean>
2507	+	(new ConcurrentHashMapV8<K,Boolean>(initialCapacity), Boolean.TRUE);
2508	+	}
2509	+
2510	+	/**
2511		* {@inheritDoc}
2512		*/
2513		public boolean isEmpty() {
2514	<	return counter.sum() <= 0L; // ignore transient negative values
2514	>	return sumCount() <= 0L; // ignore transient negative values
2515		}
2516
2517		/**
2518		* {@inheritDoc}
2519		*/
2520		public int size() {
2521	<	long n = counter.sum();
2521	>	long n = sumCount();
2522		return ((n < 0L) ? 0 :
2523		(n > (long)Integer.MAX_VALUE) ? Integer.MAX_VALUE :
2524		(int)n);
#	Line 2475 | Line 2526 | public class ConcurrentHashMapV8<K, V>
2526
2527		/**
2528		* Returns the number of mappings. This method should be used
2529	<	* instead of {@link #size} because a ConcurrentHashMap may
2529	>	* instead of {@link #size} because a ConcurrentHashMapV8 may
2530		* contain more mappings than can be represented as an int. The
2531	<	* value returned is a snapshot; the actual count may differ if
2532	<	* there are ongoing concurrent insertions or removals.
2531	>	* value returned is an estimate; the actual count may differ if
2532	>	* there are concurrent insertions or removals.
2533		*
2534		* @return the number of mappings
2535		*/
2536		public long mappingCount() {
2537	<	long n = counter.sum();
2537	>	long n = sumCount();
2538		return (n < 0L) ? 0L : n; // ignore transient negative values
2539		}
2540
#	Line 2498 | Line 2549 | public class ConcurrentHashMapV8<K, V>
2549		*
2550		* @throws NullPointerException if the specified key is null
2551		*/
2552	<	@SuppressWarnings("unchecked") public V get(Object key) {
2553	<	if (key == null)
2503	<	throw new NullPointerException();
2504	<	return (V)internalGet(key);
2552	>	public V get(Object key) {
2553	>	return internalGet(key);
2554		}
2555
2556		/**
#	Line 2510 | Line 2559 | public class ConcurrentHashMapV8<K, V>
2559		*
2560		* @param key the key
2561		* @param defaultValue the value to return if this map contains
2562	<	* no mapping for the given key.
2562	>	* no mapping for the given key
2563		* @return the mapping for the key, if present; else the defaultValue
2564		* @throws NullPointerException if the specified key is null
2565		*/
2566	<	@SuppressWarnings("unchecked") public V getValueOrDefault(Object key, V defaultValue) {
2567	<	if (key == null)
2568	<	throw new NullPointerException();
2520	<	V v = (V) internalGet(key);
2521	<	return v == null ? defaultValue : v;
2566	>	public V getValueOrDefault(Object key, V defaultValue) {
2567	>	V v;
2568	>	return (v = internalGet(key)) == null ? defaultValue : v;
2569		}
2570
2571		/**
#	Line 2531 | Line 2578 | public class ConcurrentHashMapV8<K, V>
2578		* @throws NullPointerException if the specified key is null
2579		*/
2580		public boolean containsKey(Object key) {
2534	–	if (key == null)
2535	–	throw new NullPointerException();
2581		return internalGet(key) != null;
2582		}
2583
#	Line 2549 | Line 2594 | public class ConcurrentHashMapV8<K, V>
2594		public boolean containsValue(Object value) {
2595		if (value == null)
2596		throw new NullPointerException();
2597	<	Object v;
2597	>	V v;
2598		Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
2599		while ((v = it.advance()) != null) {
2600		if (v == value || value.equals(v))
#	Line 2573 | Line 2618 | public class ConcurrentHashMapV8<K, V>
2618		*         {@code false} otherwise
2619		* @throws NullPointerException if the specified value is null
2620		*/
2621	<	public boolean contains(Object value) {
2621	>	@Deprecated public boolean contains(Object value) {
2622		return containsValue(value);
2623		}
2624
#	Line 2581 | Line 2626 | public class ConcurrentHashMapV8<K, V>
2626		* Maps the specified key to the specified value in this table.
2627		* Neither the key nor the value can be null.
2628		*
2629	<	* <p> The value can be retrieved by calling the {@code get} method
2629	>	* <p>The value can be retrieved by calling the {@code get} method
2630		* with a key that is equal to the original key.
2631		*
2632		* @param key key with which the specified value is to be associated
#	Line 2590 | Line 2635 | public class ConcurrentHashMapV8<K, V>
2635		*         {@code null} if there was no mapping for {@code key}
2636		* @throws NullPointerException if the specified key or value is null
2637		*/
2638	<	@SuppressWarnings("unchecked") public V put(K key, V value) {
2639	<	if (key == null || value == null)
2595	<	throw new NullPointerException();
2596	<	return (V)internalPut(key, value);
2638	>	public V put(K key, V value) {
2639	>	return internalPut(key, value, false);
2640		}
2641
2642		/**
#	Line 2603 | Line 2646 | public class ConcurrentHashMapV8<K, V>
2646		*         or {@code null} if there was no mapping for the key
2647		* @throws NullPointerException if the specified key or value is null
2648		*/
2649	<	@SuppressWarnings("unchecked") public V putIfAbsent(K key, V value) {
2650	<	if (key == null || value == null)
2608	<	throw new NullPointerException();
2609	<	return (V)internalPutIfAbsent(key, value);
2649	>	public V putIfAbsent(K key, V value) {
2650	>	return internalPut(key, value, true);
2651		}
2652
2653		/**
#	Line 2650 | Line 2691 | public class ConcurrentHashMapV8<K, V>
2691		* @param key key with which the specified value is to be associated
2692		* @param mappingFunction the function to compute a value
2693		* @return the current (existing or computed) value associated with
2694	<	*         the specified key, or null if the computed value is null.
2694	>	*         the specified key, or null if the computed value is null
2695		* @throws NullPointerException if the specified key or mappingFunction
2696		*         is null
2697		* @throws IllegalStateException if the computation detectably
#	Line 2659 | Line 2700 | public class ConcurrentHashMapV8<K, V>
2700		* @throws RuntimeException or Error if the mappingFunction does so,
2701		*         in which case the mapping is left unestablished
2702		*/
2703	<	@SuppressWarnings("unchecked") public V computeIfAbsent
2703	>	public V computeIfAbsent
2704		(K key, Fun<? super K, ? extends V> mappingFunction) {
2705	<	if (key == null || mappingFunction == null)
2665	<	throw new NullPointerException();
2666	<	return (V)internalComputeIfAbsent(key, mappingFunction);
2705	>	return internalComputeIfAbsent(key, mappingFunction);
2706		}
2707
2708		/**
#	Line 2700 | Line 2739 | public class ConcurrentHashMapV8<K, V>
2739		* @throws RuntimeException or Error if the remappingFunction does so,
2740		*         in which case the mapping is unchanged
2741		*/
2742	<	@SuppressWarnings("unchecked") public V computeIfPresent
2742	>	public V computeIfPresent
2743		(K key, BiFun<? super K, ? super V, ? extends V> remappingFunction) {
2744	<	if (key == null || remappingFunction == null)
2706	<	throw new NullPointerException();
2707	<	return (V)internalCompute(key, true, remappingFunction);
2744	>	return internalCompute(key, true, remappingFunction);
2745		}
2746
2747		/**
#	Line 2747 | Line 2784 | public class ConcurrentHashMapV8<K, V>
2784		* @throws RuntimeException or Error if the remappingFunction does so,
2785		*         in which case the mapping is unchanged
2786		*/
2787	<	@SuppressWarnings("unchecked") public V compute
2787	>	public V compute
2788		(K key, BiFun<? super K, ? super V, ? extends V> remappingFunction) {
2789	<	if (key == null || remappingFunction == null)
2753	<	throw new NullPointerException();
2754	<	return (V)internalCompute(key, false, remappingFunction);
2789	>	return internalCompute(key, false, remappingFunction);
2790		}
2791
2792		/**
#	Line 2779 | Line 2814 | public class ConcurrentHashMapV8<K, V>
2814		* so the computation should be short and simple, and must not
2815		* attempt to update any other mappings of this Map.
2816		*/
2817	<	@SuppressWarnings("unchecked") public V merge
2818	<	(K key, V value, BiFun<? super V, ? super V, ? extends V> remappingFunction) {
2819	<	if (key == null || value == null || remappingFunction == null)
2820	<	throw new NullPointerException();
2786	<	return (V)internalMerge(key, value, remappingFunction);
2817	>	public V merge
2818	>	(K key, V value,
2819	>	BiFun<? super V, ? super V, ? extends V> remappingFunction) {
2820	>	return internalMerge(key, value, remappingFunction);
2821		}
2822
2823		/**
#	Line 2795 | Line 2829 | public class ConcurrentHashMapV8<K, V>
2829		*         {@code null} if there was no mapping for {@code key}
2830		* @throws NullPointerException if the specified key is null
2831		*/
2832	<	@SuppressWarnings("unchecked") public V remove(Object key) {
2833	<	if (key == null)
2800	<	throw new NullPointerException();
2801	<	return (V)internalReplace(key, null, null);
2832	>	public V remove(Object key) {
2833	>	return internalReplace(key, null, null);
2834		}
2835
2836		/**
#	Line 2807 | Line 2839 | public class ConcurrentHashMapV8<K, V>
2839		* @throws NullPointerException if the specified key is null
2840		*/
2841		public boolean remove(Object key, Object value) {
2842	<	if (key == null)
2811	<	throw new NullPointerException();
2812	<	if (value == null)
2813	<	return false;
2814	<	return internalReplace(key, null, value) != null;
2842	>	return value != null && internalReplace(key, null, value) != null;
2843		}
2844
2845		/**
#	Line 2832 | Line 2860 | public class ConcurrentHashMapV8<K, V>
2860		*         or {@code null} if there was no mapping for the key
2861		* @throws NullPointerException if the specified key or value is null
2862		*/
2863	<	@SuppressWarnings("unchecked") public V replace(K key, V value) {
2863	>	public V replace(K key, V value) {
2864		if (key == null || value == null)
2865		throw new NullPointerException();
2866	<	return (V)internalReplace(key, value, null);
2866	>	return internalReplace(key, value, null);
2867		}
2868
2869		/**
#	Line 2848 | Line 2876 | public class ConcurrentHashMapV8<K, V>
2876		/**
2877		* Returns a {@link Set} view of the keys contained in this map.
2878		* The set is backed by the map, so changes to the map are
2879	<	* reflected in the set, and vice-versa.  The set supports element
2852	<	* removal, which removes the corresponding mapping from this map,
2853	<	* via the {@code Iterator.remove}, {@code Set.remove},
2854	<	* {@code removeAll}, {@code retainAll}, and {@code clear}
2855	<	* operations.  It does not support the {@code add} or
2856	<	* {@code addAll} operations.
2879	>	* reflected in the set, and vice-versa.
2880		*
2881	<	* <p>The view's {@code iterator} is a "weakly consistent" iterator
2859	<	* that will never throw {@link ConcurrentModificationException},
2860	<	* and guarantees to traverse elements as they existed upon
2861	<	* construction of the iterator, and may (but is not guaranteed to)
2862	<	* reflect any modifications subsequent to construction.
2881	>	* @return the set view
2882		*/
2883	<	public Set<K> keySet() {
2884	<	KeySet<K,V> ks = keySet;
2885	<	return (ks != null) ? ks : (keySet = new KeySet<K,V>(this));
2883	>	public KeySetView<K,V> keySet() {
2884	>	KeySetView<K,V> ks = keySet;
2885	>	return (ks != null) ? ks : (keySet = new KeySetView<K,V>(this, null));
2886	>	}
2887	>
2888	>	/**
2889	>	* Returns a {@link Set} view of the keys in this map, using the
2890	>	* given common mapped value for any additions (i.e., {@link
2891	>	* Collection#add} and {@link Collection#addAll}). This is of
2892	>	* course only appropriate if it is acceptable to use the same
2893	>	* value for all additions from this view.
2894	>	*
2895	>	* @param mappedValue the mapped value to use for any
2896	>	* additions.
2897	>	* @return the set view
2898	>	* @throws NullPointerException if the mappedValue is null
2899	>	*/
2900	>	public KeySetView<K,V> keySet(V mappedValue) {
2901	>	if (mappedValue == null)
2902	>	throw new NullPointerException();
2903	>	return new KeySetView<K,V>(this, mappedValue);
2904		}
2905
2906		/**
2907		* Returns a {@link Collection} view of the values contained in this map.
2908		* The collection is backed by the map, so changes to the map are
2909	<	* reflected in the collection, and vice-versa.  The collection
2873	<	* supports element removal, which removes the corresponding
2874	<	* mapping from this map, via the {@code Iterator.remove},
2875	<	* {@code Collection.remove}, {@code removeAll},
2876	<	* {@code retainAll}, and {@code clear} operations.  It does not
2877	<	* support the {@code add} or {@code addAll} operations.
2878	<	*
2879	<	* <p>The view's {@code iterator} is a "weakly consistent" iterator
2880	<	* that will never throw {@link ConcurrentModificationException},
2881	<	* and guarantees to traverse elements as they existed upon
2882	<	* construction of the iterator, and may (but is not guaranteed to)
2883	<	* reflect any modifications subsequent to construction.
2909	>	* reflected in the collection, and vice-versa.
2910		*/
2911	<	public Collection<V> values() {
2912	<	Values<K,V> vs = values;
2913	<	return (vs != null) ? vs : (values = new Values<K,V>(this));
2911	>	public ValuesView<K,V> values() {
2912	>	ValuesView<K,V> vs = values;
2913	>	return (vs != null) ? vs : (values = new ValuesView<K,V>(this));
2914		}
2915
2916		/**
#	Line 2904 | Line 2930 | public class ConcurrentHashMapV8<K, V>
2930		* reflect any modifications subsequent to construction.
2931		*/
2932		public Set<Map.Entry<K,V>> entrySet() {
2933	<	EntrySet<K,V> es = entrySet;
2934	<	return (es != null) ? es : (entrySet = new EntrySet<K,V>(this));
2933	>	EntrySetView<K,V> es = entrySet;
2934	>	return (es != null) ? es : (entrySet = new EntrySetView<K,V>(this));
2935		}
2936
2937		/**
#	Line 2965 | Line 2991 | public class ConcurrentHashMapV8<K, V>
2991		public int hashCode() {
2992		int h = 0;
2993		Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
2994	<	Object v;
2994	>	V v;
2995		while ((v = it.advance()) != null) {
2996		h += it.nextKey.hashCode() ^ v.hashCode();
2997		}
#	Line 2987 | Line 3013 | public class ConcurrentHashMapV8<K, V>
3013		Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3014		StringBuilder sb = new StringBuilder();
3015		sb.append('{');
3016	<	Object v;
3016	>	V v;
3017		if ((v = it.advance()) != null) {
3018		for (;;) {
3019		Object k = it.nextKey;
#	Line 3018 | Line 3044 | public class ConcurrentHashMapV8<K, V>
3044		return false;
3045		Map<?,?> m = (Map<?,?>) o;
3046		Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3047	<	Object val;
3047	>	V val;
3048		while ((val = it.advance()) != null) {
3049		Object v = m.get(it.nextKey);
3050		if (v == null || (v != val && !v.equals(val)))
#	Line 3038 | Line 3064 | public class ConcurrentHashMapV8<K, V>
3064
3065		/* ----------------Iterators -------------- */
3066
3067	<	@SuppressWarnings("serial") static final class KeyIterator<K,V> extends Traverser<K,V,Object>
3067	>	@SuppressWarnings("serial") static final class KeyIterator<K,V>
3068	>	extends Traverser<K,V,Object>
3069		implements Spliterator<K>, Enumeration<K> {
3070		KeyIterator(ConcurrentHashMapV8<K, V> map) { super(map); }
3071	<	KeyIterator(Traverser<K,V,Object> it) {
3072	<	super(it);
3071	>	KeyIterator(ConcurrentHashMapV8<K, V> map, Traverser<K,V,Object> it) {
3072	>	super(map, it, -1);
3073		}
3074		public KeyIterator<K,V> split() {
3075	<	if (last != null || (next != null && nextVal == null))
3075	>	if (nextKey != null)
3076		throw new IllegalStateException();
3077	<	return new KeyIterator<K,V>(this);
3077	>	return new KeyIterator<K,V>(map, this);
3078		}
3079		@SuppressWarnings("unchecked") public final K next() {
3080		if (nextVal == null && advance() == null)
#	Line 3060 | Line 3087 | public class ConcurrentHashMapV8<K, V>
3087		public final K nextElement() { return next(); }
3088		}
3089
3090	<	@SuppressWarnings("serial") static final class ValueIterator<K,V> extends Traverser<K,V,Object>
3090	>	@SuppressWarnings("serial") static final class ValueIterator<K,V>
3091	>	extends Traverser<K,V,Object>
3092		implements Spliterator<V>, Enumeration<V> {
3093		ValueIterator(ConcurrentHashMapV8<K, V> map) { super(map); }
3094	<	ValueIterator(Traverser<K,V,Object> it) {
3095	<	super(it);
3094	>	ValueIterator(ConcurrentHashMapV8<K, V> map, Traverser<K,V,Object> it) {
3095	>	super(map, it, -1);
3096		}
3097		public ValueIterator<K,V> split() {
3098	<	if (last != null || (next != null && nextVal == null))
3098	>	if (nextKey != null)
3099		throw new IllegalStateException();
3100	<	return new ValueIterator<K,V>(this);
3100	>	return new ValueIterator<K,V>(map, this);
3101		}
3102
3103	<	@SuppressWarnings("unchecked") public final V next() {
3104	<	Object v;
3103	>	public final V next() {
3104	>	V v;
3105		if ((v = nextVal) == null && (v = advance()) == null)
3106		throw new NoSuchElementException();
3107		nextVal = null;
3108	<	return (V) v;
3108	>	return v;
3109		}
3110
3111		public final V nextElement() { return next(); }
3112		}
3113
3114	<	@SuppressWarnings("serial") static final class EntryIterator<K,V> extends Traverser<K,V,Object>
3114	>	@SuppressWarnings("serial") static final class EntryIterator<K,V>
3115	>	extends Traverser<K,V,Object>
3116		implements Spliterator<Map.Entry<K,V>> {
3117		EntryIterator(ConcurrentHashMapV8<K, V> map) { super(map); }
3118	<	EntryIterator(Traverser<K,V,Object> it) {
3119	<	super(it);
3118	>	EntryIterator(ConcurrentHashMapV8<K, V> map, Traverser<K,V,Object> it) {
3119	>	super(map, it, -1);
3120		}
3121		public EntryIterator<K,V> split() {
3122	<	if (last != null || (next != null && nextVal == null))
3122	>	if (nextKey != null)
3123		throw new IllegalStateException();
3124	<	return new EntryIterator<K,V>(this);
3124	>	return new EntryIterator<K,V>(map, this);
3125		}
3126
3127		@SuppressWarnings("unchecked") public final Map.Entry<K,V> next() {
3128	<	Object v;
3128	>	V v;
3129		if ((v = nextVal) == null && (v = advance()) == null)
3130		throw new NoSuchElementException();
3131		Object k = nextKey;
3132		nextVal = null;
3133	<	return new MapEntry<K,V>((K)k, (V)v, map);
3133	>	return new MapEntry<K,V>((K)k, v, map);
3134		}
3135		}
3136
#	Line 3148 | Line 3177 | public class ConcurrentHashMapV8<K, V>
3177		}
3178		}
3179
3151	–	/* ----------------Views -------------- */
3152	–
3180		/**
3181	<	* Base class for views.
3181	>	* Returns exportable snapshot entry for the given key and value
3182	>	* when write-through can't or shouldn't be used.
3183		*/
3184	<	static abstract class CHMView<K, V> {
3185	<	final ConcurrentHashMapV8<K, V> map;
3158	<	CHMView(ConcurrentHashMapV8<K, V> map)  { this.map = map; }
3159	<	public final int size()                 { return map.size(); }
3160	<	public final boolean isEmpty()          { return map.isEmpty(); }
3161	<	public final void clear()               { map.clear(); }
3162	<
3163	<	// implementations below rely on concrete classes supplying these
3164	<	abstract public Iterator<?> iterator();
3165	<	abstract public boolean contains(Object o);
3166	<	abstract public boolean remove(Object o);
3167	<
3168	<	private static final String oomeMsg = "Required array size too large";
3169	<
3170	<	public final Object[] toArray() {
3171	<	long sz = map.mappingCount();
3172	<	if (sz > (long)(MAX_ARRAY_SIZE))
3173	<	throw new OutOfMemoryError(oomeMsg);
3174	<	int n = (int)sz;
3175	<	Object[] r = new Object[n];
3176	<	int i = 0;
3177	<	Iterator<?> it = iterator();
3178	<	while (it.hasNext()) {
3179	<	if (i == n) {
3180	<	if (n >= MAX_ARRAY_SIZE)
3181	<	throw new OutOfMemoryError(oomeMsg);
3182	<	if (n >= MAX_ARRAY_SIZE - (MAX_ARRAY_SIZE >>> 1) - 1)
3183	<	n = MAX_ARRAY_SIZE;
3184	<	else
3185	<	n += (n >>> 1) + 1;
3186	<	r = Arrays.copyOf(r, n);
3187	<	}
3188	<	r[i++] = it.next();
3189	<	}
3190	<	return (i == n) ? r : Arrays.copyOf(r, i);
3191	<	}
3192	<
3193	<	@SuppressWarnings("unchecked") public final <T> T[] toArray(T[] a) {
3194	<	long sz = map.mappingCount();
3195	<	if (sz > (long)(MAX_ARRAY_SIZE))
3196	<	throw new OutOfMemoryError(oomeMsg);
3197	<	int m = (int)sz;
3198	<	T[] r = (a.length >= m) ? a :
3199	<	(T[])java.lang.reflect.Array
3200	<	.newInstance(a.getClass().getComponentType(), m);
3201	<	int n = r.length;
3202	<	int i = 0;
3203	<	Iterator<?> it = iterator();
3204	<	while (it.hasNext()) {
3205	<	if (i == n) {
3206	<	if (n >= MAX_ARRAY_SIZE)
3207	<	throw new OutOfMemoryError(oomeMsg);
3208	<	if (n >= MAX_ARRAY_SIZE - (MAX_ARRAY_SIZE >>> 1) - 1)
3209	<	n = MAX_ARRAY_SIZE;
3210	<	else
3211	<	n += (n >>> 1) + 1;
3212	<	r = Arrays.copyOf(r, n);
3213	<	}
3214	<	r[i++] = (T)it.next();
3215	<	}
3216	<	if (a == r && i < n) {
3217	<	r[i] = null; // null-terminate
3218	<	return r;
3219	<	}
3220	<	return (i == n) ? r : Arrays.copyOf(r, i);
3221	<	}
3222	<
3223	<	public final int hashCode() {
3224	<	int h = 0;
3225	<	for (Iterator<?> it = iterator(); it.hasNext();)
3226	<	h += it.next().hashCode();
3227	<	return h;
3228	<	}
3229	<
3230	<	public final String toString() {
3231	<	StringBuilder sb = new StringBuilder();
3232	<	sb.append('[');
3233	<	Iterator<?> it = iterator();
3234	<	if (it.hasNext()) {
3235	<	for (;;) {
3236	<	Object e = it.next();
3237	<	sb.append(e == this ? "(this Collection)" : e);
3238	<	if (!it.hasNext())
3239	<	break;
3240	<	sb.append(',').append(' ');
3241	<	}
3242	<	}
3243	<	return sb.append(']').toString();
3244	<	}
3245	<
3246	<	public final boolean containsAll(Collection<?> c) {
3247	<	if (c != this) {
3248	<	for (Iterator<?> it = c.iterator(); it.hasNext();) {
3249	<	Object e = it.next();
3250	<	if (e == null || !contains(e))
3251	<	return false;
3252	<	}
3253	<	}
3254	<	return true;
3255	<	}
3256	<
3257	<	public final boolean removeAll(Collection<?> c) {
3258	<	boolean modified = false;
3259	<	for (Iterator<?> it = iterator(); it.hasNext();) {
3260	<	if (c.contains(it.next())) {
3261	<	it.remove();
3262	<	modified = true;
3263	<	}
3264	<	}
3265	<	return modified;
3266	<	}
3267	<
3268	<	public final boolean retainAll(Collection<?> c) {
3269	<	boolean modified = false;
3270	<	for (Iterator<?> it = iterator(); it.hasNext();) {
3271	<	if (!c.contains(it.next())) {
3272	<	it.remove();
3273	<	modified = true;
3274	<	}
3275	<	}
3276	<	return modified;
3277	<	}
3278	<
3279	<	}
3280	<
3281	<	static final class KeySet<K,V> extends CHMView<K,V> implements Set<K> {
3282	<	KeySet(ConcurrentHashMapV8<K, V> map)  {
3283	<	super(map);
3284	<	}
3285	<	public final boolean contains(Object o) { return map.containsKey(o); }
3286	<	public final boolean remove(Object o)   { return map.remove(o) != null; }
3287	<	public final Iterator<K> iterator() {
3288	<	return new KeyIterator<K,V>(map);
3289	<	}
3290	<	public final boolean add(K e) {
3291	<	throw new UnsupportedOperationException();
3292	<	}
3293	<	public final boolean addAll(Collection<? extends K> c) {
3294	<	throw new UnsupportedOperationException();
3295	<	}
3296	<	public boolean equals(Object o) {
3297	<	Set<?> c;
3298	<	return ((o instanceof Set) &&
3299	<	((c = (Set<?>)o) == this ||
3300	<	(containsAll(c) && c.containsAll(this))));
3301	<	}
3302	<	}
3303	<
3304	<
3305	<	static final class Values<K,V> extends CHMView<K,V>
3306	<	implements Collection<V> {
3307	<	Values(ConcurrentHashMapV8<K, V> map)   { super(map); }
3308	<	public final boolean contains(Object o) { return map.containsValue(o); }
3309	<	public final boolean remove(Object o) {
3310	<	if (o != null) {
3311	<	Iterator<V> it = new ValueIterator<K,V>(map);
3312	<	while (it.hasNext()) {
3313	<	if (o.equals(it.next())) {
3314	<	it.remove();
3315	<	return true;
3316	<	}
3317	<	}
3318	<	}
3319	<	return false;
3320	<	}
3321	<	public final Iterator<V> iterator() {
3322	<	return new ValueIterator<K,V>(map);
3323	<	}
3324	<	public final boolean add(V e) {
3325	<	throw new UnsupportedOperationException();
3326	<	}
3327	<	public final boolean addAll(Collection<? extends V> c) {
3328	<	throw new UnsupportedOperationException();
3329	<	}
3330	<
3331	<	}
3332	<
3333	<	static final class EntrySet<K,V> extends CHMView<K,V>
3334	<	implements Set<Map.Entry<K,V>> {
3335	<	EntrySet(ConcurrentHashMapV8<K, V> map) { super(map); }
3336	<	public final boolean contains(Object o) {
3337	<	Object k, v, r; Map.Entry<?,?> e;
3338	<	return ((o instanceof Map.Entry) &&
3339	<	(k = (e = (Map.Entry<?,?>)o).getKey()) != null &&
3340	<	(r = map.get(k)) != null &&
3341	<	(v = e.getValue()) != null &&
3342	<	(v == r || v.equals(r)));
3343	<	}
3344	<	public final boolean remove(Object o) {
3345	<	Object k, v; Map.Entry<?,?> e;
3346	<	return ((o instanceof Map.Entry) &&
3347	<	(k = (e = (Map.Entry<?,?>)o).getKey()) != null &&
3348	<	(v = e.getValue()) != null &&
3349	<	map.remove(k, v));
3350	<	}
3351	<	public final Iterator<Map.Entry<K,V>> iterator() {
3352	<	return new EntryIterator<K,V>(map);
3353	<	}
3354	<	public final boolean add(Entry<K,V> e) {
3355	<	throw new UnsupportedOperationException();
3356	<	}
3357	<	public final boolean addAll(Collection<? extends Entry<K,V>> c) {
3358	<	throw new UnsupportedOperationException();
3359	<	}
3360	<	public boolean equals(Object o) {
3361	<	Set<?> c;
3362	<	return ((o instanceof Set) &&
3363	<	((c = (Set<?>)o) == this ||
3364	<	(containsAll(c) && c.containsAll(this))));
3365	<	}
3184	>	static <K,V> AbstractMap.SimpleEntry<K,V> entryFor(K k, V v) {
3185	>	return new AbstractMap.SimpleEntry<K,V>(k, v);
3186		}
3187
3188		/* ---------------- Serialization Support -------------- */
#	Line 3386 | Line 3206 | public class ConcurrentHashMapV8<K, V>
3206		* for each key-value mapping, followed by a null pair.
3207		* The key-value mappings are emitted in no particular order.
3208		*/
3209	<	@SuppressWarnings("unchecked") private void writeObject(java.io.ObjectOutputStream s)
3209	>	@SuppressWarnings("unchecked") private void writeObject
3210	>	(java.io.ObjectOutputStream s)
3211		throws java.io.IOException {
3212		if (segments == null) { // for serialization compatibility
3213		segments = (Segment<K,V>[])
#	Line 3396 | Line 3217 | public class ConcurrentHashMapV8<K, V>
3217		}
3218		s.defaultWriteObject();
3219		Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3220	<	Object v;
3220	>	V v;
3221		while ((v = it.advance()) != null) {
3222		s.writeObject(it.nextKey);
3223		s.writeObject(v);
#	Line 3410 | Line 3231 | public class ConcurrentHashMapV8<K, V>
3231		* Reconstitutes the instance from a stream (that is, deserializes it).
3232		* @param s the stream
3233		*/
3234	<	@SuppressWarnings("unchecked") private void readObject(java.io.ObjectInputStream s)
3234	>	@SuppressWarnings("unchecked") private void readObject
3235	>	(java.io.ObjectInputStream s)
3236		throws java.io.IOException, ClassNotFoundException {
3237		s.defaultReadObject();
3238		this.segments = null; // unneeded
3417	–	// initialize transient final field
3418	–	UNSAFE.putObjectVolatile(this, counterOffset, new LongAdder());
3239
3240		// Create all nodes, then place in table once size is known
3241		long size = 0L;
3242	<	Node p = null;
3242	>	Node<V> p = null;
3243		for (;;) {
3244		K k = (K) s.readObject();
3245		V v = (V) s.readObject();
3246		if (k != null && v != null) {
3247		int h = spread(k.hashCode());
3248	<	p = new Node(h, k, v, p);
3248	>	p = new Node<V>(h, k, v, p);
3249		++size;
3250		}
3251		else
#	Line 3443 | Line 3263 | public class ConcurrentHashMapV8<K, V>
3263		int sc = sizeCtl;
3264		boolean collide = false;
3265		if (n > sc &&
3266	<	UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) {
3266	>	U.compareAndSwapInt(this, SIZECTL, sc, -1)) {
3267		try {
3268		if (table == null) {
3269		init = true;
3270	<	Node[] tab = new Node[n];
3270	>	@SuppressWarnings("rawtypes") Node[] rt = new Node[n];
3271	>	Node<V>[] tab = (Node<V>[])rt;
3272		int mask = n - 1;
3273		while (p != null) {
3274		int j = p.hash & mask;
3275	<	Node next = p.next;
3276	<	Node q = p.next = tabAt(tab, j);
3275	>	Node<V> next = p.next;
3276	>	Node<V> q = p.next = tabAt(tab, j);
3277		setTabAt(tab, j, p);
3278		if (!collide && q != null && q.hash == p.hash)
3279		collide = true;
3280		p = next;
3281		}
3282		table = tab;
3283	<	counter.add(size);
3283	>	addCount(size, -1);
3284		sc = n - (n >>> 2);
3285		}
3286		} finally {
3287		sizeCtl = sc;
3288		}
3289		if (collide) { // rescan and convert to TreeBins
3290	<	Node[] tab = table;
3290	>	Node<V>[] tab = table;
3291		for (int i = 0; i < tab.length; ++i) {
3292		int c = 0;
3293	<	for (Node e = tabAt(tab, i); e != null; e = e.next) {
3293	>	for (Node<V> e = tabAt(tab, i); e != null; e = e.next) {
3294		if (++c > TREE_THRESHOLD &&
3295		(e.key instanceof Comparable)) {
3296		replaceWithTreeBin(tab, i, e.key);
#	Line 3481 | Line 3302 | public class ConcurrentHashMapV8<K, V>
3302		}
3303		if (!init) { // Can only happen if unsafely published.
3304		while (p != null) {
3305	<	internalPut(p.key, p.val);
3305	>	internalPut((K)p.key, p.val, false);
3306		p = p.next;
3307		}
3308		}
3309		}
3310		}
3311
3491	–
3312		// -------------------------------------------------------
3313
3314		// Sams
#	Line 3530 | Line 3350 | public class ConcurrentHashMapV8<K, V>
3350
3351		// -------------------------------------------------------
3352
3353	+	// Sequential bulk operations
3354	+
3355		/**
3356	<	* Returns an extended {@link Parallel} view of this map using the
3535	<	* given executor for bulk parallel operations.
3356	>	* Performs the given action for each (key, value).
3357		*
3358	<	* @param executor the executor
3538	<	* @return a parallel view
3358	>	* @param action the action
3359		*/
3360	<	public Parallel parallel(ForkJoinPool executor)  {
3361	<	return new Parallel(executor);
3360	>	@SuppressWarnings("unchecked") public void forEachSequentially
3361	>	(BiAction<K,V> action) {
3362	>	if (action == null) throw new NullPointerException();
3363	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3364	>	V v;
3365	>	while ((v = it.advance()) != null)
3366	>	action.apply((K)it.nextKey, v);
3367		}
3368
3369		/**
3370	<	* An extended view of a ConcurrentHashMap supporting bulk
3371	<	* parallel operations. These operations are designed to be
3372	<	* safely, and often sensibly, applied even with maps that are
3373	<	* being concurrently updated by other threads; for example, when
3374	<	* computing a snapshot summary of the values in a shared
3375	<	* registry.  There are three kinds of operation, each with four
3376	<	* forms, accepting functions with Keys, Values, Entries, and
3552	<	* (Key, Value) arguments and/or return values. Because the
3553	<	* elements of a ConcurrentHashMap are not ordered in any
3554	<	* particular way, and may be processed in different orders in
3555	<	* different parallel executions, the correctness of supplied
3556	<	* functions should not depend on any ordering, or on any other
3557	<	* objects or values that may transiently change while computation
3558	<	* is in progress; and except for forEach actions, should ideally
3559	<	* be side-effect-free.
3560	<	*
3561	<	* <ul>
3562	<	* <li> forEach: Perform a given action on each element.
3563	<	* A variant form applies a given transformation on each element
3564	<	* before performing the action.</li>
3565	<	*
3566	<	* <li> search: Return the first available non-null result of
3567	<	* applying a given function on each element; skipping further
3568	<	* search when a result is found.</li>
3569	<	*
3570	<	* <li> reduce: Accumulate each element.  The supplied reduction
3571	<	* function cannot rely on ordering (more formally, it should be
3572	<	* both associative and commutative).  There are five variants:
3573	<	*
3574	<	* <ul>
3575	<	*
3576	<	* <li> Plain reductions. (There is not a form of this method for
3577	<	* (key, value) function arguments since there is no corresponding
3578	<	* return type.)</li>
3579	<	*
3580	<	* <li> Mapped reductions that accumulate the results of a given
3581	<	* function applied to each element.</li>
3582	<	*
3583	<	* <li> Reductions to scalar doubles, longs, and ints, using a
3584	<	* given basis value.</li>
3585	<	*
3586	<	* </li>
3587	<	* </ul>
3588	<	* </ul>
3589	<	*
3590	<	* <p>The concurrency properties of the bulk operations follow
3591	<	* from those of ConcurrentHashMap: Any non-null result returned
3592	<	* from {@code get(key)} and related access methods bears a
3593	<	* happens-before relation with the associated insertion or
3594	<	* update.  The result of any bulk operation reflects the
3595	<	* composition of these per-element relations (but is not
3596	<	* necessarily atomic with respect to the map as a whole unless it
3597	<	* is somehow known to be quiescent).  Conversely, because keys
3598	<	* and values in the map are never null, null serves as a reliable
3599	<	* atomic indicator of the current lack of any result.  To
3600	<	* maintain this property, null serves as an implicit basis for
3601	<	* all non-scalar reduction operations. For the double, long, and
3602	<	* int versions, the basis should be one that, when combined with
3603	<	* any other value, returns that other value (more formally, it
3604	<	* should be the identity element for the reduction). Most common
3605	<	* reductions have these properties; for example, computing a sum
3606	<	* with basis 0 or a minimum with basis MAX_VALUE.
3607	<	*
3608	<	* <p>Search and transformation functions provided as arguments
3609	<	* should similarly return null to indicate the lack of any result
3610	<	* (in which case it is not used). In the case of mapped
3611	<	* reductions, this also enables transformations to serve as
3612	<	* filters, returning null (or, in the case of primitive
3613	<	* specializations, the identity basis) if the element should not
3614	<	* be combined. You can create compound transformations and
3615	<	* filterings by composing them yourself under this "null means
3616	<	* there is nothing there now" rule before using them in search or
3617	<	* reduce operations.
3618	<	*
3619	<	* <p>Methods accepting and/or returning Entry arguments maintain
3620	<	* key-value associations. They may be useful for example when
3621	<	* finding the key for the greatest value. Note that "plain" Entry
3622	<	* arguments can be supplied using {@code new
3623	<	* AbstractMap.SimpleEntry(k,v)}.
3624	<	*
3625	<	* <p> Bulk operations may complete abruptly, throwing an
3626	<	* exception encountered in the application of a supplied
3627	<	* function. Bear in mind when handling such exceptions that other
3628	<	* concurrently executing functions could also have thrown
3629	<	* exceptions, or would have done so if the first exception had
3630	<	* not occurred.
3631	<	*
3632	<	* <p>Parallel speedups compared to sequential processing are
3633	<	* common but not guaranteed.  Operations involving brief
3634	<	* functions on small maps may execute more slowly than sequential
3635	<	* loops if the underlying work to parallelize the computation is
3636	<	* more expensive than the computation itself. Similarly,
3637	<	* parallelization may not lead to much actual parallelism if all
3638	<	* processors are busy performing unrelated tasks.
3639	<	*
3640	<	* <p> All arguments to all task methods must be non-null.
3641	<	*
3642	<	* <p><em>jsr166e note: During transition, this class
3643	<	* uses nested functional interfaces with different names but the
3644	<	* same forms as those expected for JDK8.<em>
3370	>	* Performs the given action for each non-null transformation
3371	>	* of each (key, value).
3372	>	*
3373	>	* @param transformer a function returning the transformation
3374	>	* for an element, or null of there is no transformation (in
3375	>	* which case the action is not applied).
3376	>	* @param action the action
3377		*/
3378	<	public class Parallel {
3379	<	final ForkJoinPool fjp;
3380	<
3381	<	/**
3382	<	* Returns an extended view of this map using the given
3383	<	* executor for bulk parallel operations.
3384	<	*
3385	<	* @param executor the executor
3386	<	*/
3387	<	public Parallel(ForkJoinPool executor)  {
3656	<	this.fjp = executor;
3378	>	@SuppressWarnings("unchecked") public <U> void forEachSequentially
3379	>	(BiFun<? super K, ? super V, ? extends U> transformer,
3380	>	Action<U> action) {
3381	>	if (transformer == null || action == null)
3382	>	throw new NullPointerException();
3383	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3384	>	V v; U u;
3385	>	while ((v = it.advance()) != null) {
3386	>	if ((u = transformer.apply((K)it.nextKey, v)) != null)
3387	>	action.apply(u);
3388		}
3389	+	}
3390
3391	<	/**
3392	<	* Performs the given action for each (key, value).
3393	<	*
3394	<	* @param action the action
3395	<	*/
3396	<	public void forEach(BiAction<K,V> action) {
3397	<	fjp.invoke(ForkJoinTasks.forEach
3398	<	(ConcurrentHashMapV8.this, action));
3391	>	/**
3392	>	* Returns a non-null result from applying the given search
3393	>	* function on each (key, value), or null if none.
3394	>	*
3395	>	* @param searchFunction a function returning a non-null
3396	>	* result on success, else null
3397	>	* @return a non-null result from applying the given search
3398	>	* function on each (key, value), or null if none
3399	>	*/
3400	>	@SuppressWarnings("unchecked") public <U> U searchSequentially
3401	>	(BiFun<? super K, ? super V, ? extends U> searchFunction) {
3402	>	if (searchFunction == null) throw new NullPointerException();
3403	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3404	>	V v; U u;
3405	>	while ((v = it.advance()) != null) {
3406	>	if ((u = searchFunction.apply((K)it.nextKey, v)) != null)
3407	>	return u;
3408		}
3409	+	return null;
3410	+	}
3411
3412	<	/**
3413	<	* Performs the given action for each non-null transformation
3414	<	* of each (key, value).
3415	<	*
3416	<	* @param transformer a function returning the transformation
3417	<	* for an element, or null of there is no transformation (in
3418	<	* which case the action is not applied).
3419	<	* @param action the action
3420	<	*/
3421	<	public <U> void forEach(BiFun<? super K, ? super V, ? extends U> transformer,
3422	<	Action<U> action) {
3423	<	fjp.invoke(ForkJoinTasks.forEach
3424	<	(ConcurrentHashMapV8.this, transformer, action));
3412	>	/**
3413	>	* Returns the result of accumulating the given transformation
3414	>	* of all (key, value) pairs using the given reducer to
3415	>	* combine values, or null if none.
3416	>	*
3417	>	* @param transformer a function returning the transformation
3418	>	* for an element, or null of there is no transformation (in
3419	>	* which case it is not combined).
3420	>	* @param reducer a commutative associative combining function
3421	>	* @return the result of accumulating the given transformation
3422	>	* of all (key, value) pairs
3423	>	*/
3424	>	@SuppressWarnings("unchecked") public <U> U reduceSequentially
3425	>	(BiFun<? super K, ? super V, ? extends U> transformer,
3426	>	BiFun<? super U, ? super U, ? extends U> reducer) {
3427	>	if (transformer == null || reducer == null)
3428	>	throw new NullPointerException();
3429	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3430	>	U r = null, u; V v;
3431	>	while ((v = it.advance()) != null) {
3432	>	if ((u = transformer.apply((K)it.nextKey, v)) != null)
3433	>	r = (r == null) ? u : reducer.apply(r, u);
3434		}
3435	+	return r;
3436	+	}
3437
3438	<	/**
3439	<	* Returns a non-null result from applying the given search
3440	<	* function on each (key, value), or null if none.  Upon
3441	<	* success, further element processing is suppressed and the
3442	<	* results of any other parallel invocations of the search
3443	<	* function are ignored.
3444	<	*
3445	<	* @param searchFunction a function returning a non-null
3446	<	* result on success, else null
3447	<	* @return a non-null result from applying the given search
3448	<	* function on each (key, value), or null if none
3449	<	*/
3450	<	public <U> U search(BiFun<? super K, ? super V, ? extends U> searchFunction) {
3451	<	return fjp.invoke(ForkJoinTasks.search
3452	<	(ConcurrentHashMapV8.this, searchFunction));
3453	<	}
3438	>	/**
3439	>	* Returns the result of accumulating the given transformation
3440	>	* of all (key, value) pairs using the given reducer to
3441	>	* combine values, and the given basis as an identity value.
3442	>	*
3443	>	* @param transformer a function returning the transformation
3444	>	* for an element
3445	>	* @param basis the identity (initial default value) for the reduction
3446	>	* @param reducer a commutative associative combining function
3447	>	* @return the result of accumulating the given transformation
3448	>	* of all (key, value) pairs
3449	>	*/
3450	>	@SuppressWarnings("unchecked") public double reduceToDoubleSequentially
3451	>	(ObjectByObjectToDouble<? super K, ? super V> transformer,
3452	>	double basis,
3453	>	DoubleByDoubleToDouble reducer) {
3454	>	if (transformer == null || reducer == null)
3455	>	throw new NullPointerException();
3456	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3457	>	double r = basis; V v;
3458	>	while ((v = it.advance()) != null)
3459	>	r = reducer.apply(r, transformer.apply((K)it.nextKey, v));
3460	>	return r;
3461	>	}
3462
3463	<	/**
3464	<	* Returns the result of accumulating the given transformation
3465	<	* of all (key, value) pairs using the given reducer to
3466	<	* combine values, or null if none.
3467	<	*
3468	<	* @param transformer a function returning the transformation
3469	<	* for an element, or null of there is no transformation (in
3470	<	* which case it is not combined).
3471	<	* @param reducer a commutative associative combining function
3472	<	* @return the result of accumulating the given transformation
3473	<	* of all (key, value) pairs
3474	<	*/
3475	<	public <U> U reduce(BiFun<? super K, ? super V, ? extends U> transformer,
3476	<	BiFun<? super U, ? super U, ? extends U> reducer) {
3477	<	return fjp.invoke(ForkJoinTasks.reduce
3478	<	(ConcurrentHashMapV8.this, transformer, reducer));
3479	<	}
3463	>	/**
3464	>	* Returns the result of accumulating the given transformation
3465	>	* of all (key, value) pairs using the given reducer to
3466	>	* combine values, and the given basis as an identity value.
3467	>	*
3468	>	* @param transformer a function returning the transformation
3469	>	* for an element
3470	>	* @param basis the identity (initial default value) for the reduction
3471	>	* @param reducer a commutative associative combining function
3472	>	* @return the result of accumulating the given transformation
3473	>	* of all (key, value) pairs
3474	>	*/
3475	>	@SuppressWarnings("unchecked") public long reduceToLongSequentially
3476	>	(ObjectByObjectToLong<? super K, ? super V> transformer,
3477	>	long basis,
3478	>	LongByLongToLong reducer) {
3479	>	if (transformer == null || reducer == null)
3480	>	throw new NullPointerException();
3481	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3482	>	long r = basis; V v;
3483	>	while ((v = it.advance()) != null)
3484	>	r = reducer.apply(r, transformer.apply((K)it.nextKey, v));
3485	>	return r;
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, and the given basis as an identity value.
3492	<	*
3493	<	* @param transformer a function returning the transformation
3494	<	* for an element
3495	<	* @param basis the identity (initial default value) for the reduction
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 double reduceToDouble(ObjectByObjectToDouble<? super K, ? super V> transformer,
3501	<	double basis,
3502	<	DoubleByDoubleToDouble reducer) {
3503	<	return fjp.invoke(ForkJoinTasks.reduceToDouble
3504	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
3505	<	}
3488	>	/**
3489	>	* Returns the result of accumulating the given transformation
3490	>	* of all (key, value) pairs using the given reducer to
3491	>	* combine values, and the given basis as an identity value.
3492	>	*
3493	>	* @param transformer a function returning the transformation
3494	>	* for an element
3495	>	* @param basis the identity (initial default value) for the reduction
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	>	@SuppressWarnings("unchecked") public int reduceToIntSequentially
3501	>	(ObjectByObjectToInt<? super K, ? super V> transformer,
3502	>	int basis,
3503	>	IntByIntToInt reducer) {
3504	>	if (transformer == null || reducer == null)
3505	>	throw new NullPointerException();
3506	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3507	>	int r = basis; V v;
3508	>	while ((v = it.advance()) != null)
3509	>	r = reducer.apply(r, transformer.apply((K)it.nextKey, v));
3510	>	return r;
3511	>	}
3512
3513	<	/**
3514	<	* Returns the result of accumulating the given transformation
3515	<	* of all (key, value) pairs using the given reducer to
3516	<	* combine values, and the given basis as an identity value.
3517	<	*
3518	<	* @param transformer a function returning the transformation
3519	<	* for an element
3520	<	* @param basis the identity (initial default value) for the reduction
3521	<	* @param reducer a commutative associative combining function
3522	<	* @return the result of accumulating the given transformation
3523	<	* of all (key, value) pairs
3524	<	*/
3750	<	public long reduceToLong(ObjectByObjectToLong<? super K, ? super V> transformer,
3751	<	long basis,
3752	<	LongByLongToLong reducer) {
3753	<	return fjp.invoke(ForkJoinTasks.reduceToLong
3754	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
3755	<	}
3513	>	/**
3514	>	* Performs the given action for each key.
3515	>	*
3516	>	* @param action the action
3517	>	*/
3518	>	@SuppressWarnings("unchecked") public void forEachKeySequentially
3519	>	(Action<K> action) {
3520	>	if (action == null) throw new NullPointerException();
3521	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3522	>	while (it.advance() != null)
3523	>	action.apply((K)it.nextKey);
3524	>	}
3525
3526	<	/**
3527	<	* Returns the result of accumulating the given transformation
3528	<	* of all (key, value) pairs using the given reducer to
3529	<	* combine values, and the given basis as an identity value.
3530	<	*
3531	<	* @param transformer a function returning the transformation
3532	<	* for an element
3533	<	* @param basis the identity (initial default value) for the reduction
3534	<	* @param reducer a commutative associative combining function
3535	<	* @return the result of accumulating the given transformation
3536	<	* of all (key, value) pairs
3537	<	*/
3538	<	public int reduceToInt(ObjectByObjectToInt<? super K, ? super V> transformer,
3539	<	int basis,
3540	<	IntByIntToInt reducer) {
3541	<	return fjp.invoke(ForkJoinTasks.reduceToInt
3542	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
3526	>	/**
3527	>	* Performs the given action for each non-null transformation
3528	>	* of each key.
3529	>	*
3530	>	* @param transformer a function returning the transformation
3531	>	* for an element, or null of there is no transformation (in
3532	>	* which case the action is not applied).
3533	>	* @param action the action
3534	>	*/
3535	>	@SuppressWarnings("unchecked") public <U> void forEachKeySequentially
3536	>	(Fun<? super K, ? extends U> transformer,
3537	>	Action<U> action) {
3538	>	if (transformer == null || action == null)
3539	>	throw new NullPointerException();
3540	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3541	>	U u;
3542	>	while (it.advance() != null) {
3543	>	if ((u = transformer.apply((K)it.nextKey)) != null)
3544	>	action.apply(u);
3545		}
3546	+	ForkJoinTasks.forEachKey
3547	+	(this, transformer, action).invoke();
3548	+	}
3549
3550	<	/**
3551	<	* Performs the given action for each key.
3552	<	*
3553	<	* @param action the action
3554	<	*/
3555	<	public void forEachKey(Action<K> action) {
3556	<	fjp.invoke(ForkJoinTasks.forEachKey
3557	<	(ConcurrentHashMapV8.this, action));
3550	>	/**
3551	>	* Returns a non-null result from applying the given search
3552	>	* function on each key, or null if none.
3553	>	*
3554	>	* @param searchFunction a function returning a non-null
3555	>	* result on success, else null
3556	>	* @return a non-null result from applying the given search
3557	>	* function on each key, or null if none
3558	>	*/
3559	>	@SuppressWarnings("unchecked") public <U> U searchKeysSequentially
3560	>	(Fun<? super K, ? extends U> searchFunction) {
3561	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3562	>	U u;
3563	>	while (it.advance() != null) {
3564	>	if ((u = searchFunction.apply((K)it.nextKey)) != null)
3565	>	return u;
3566		}
3567	+	return null;
3568	+	}
3569
3570	<	/**
3571	<	* Performs the given action for each non-null transformation
3572	<	* of each key.
3573	<	*
3574	<	* @param transformer a function returning the transformation
3575	<	* for an element, or null of there is no transformation (in
3576	<	* which case the action is not applied).
3577	<	* @param action the action
3578	<	*/
3579	<	public <U> void forEachKey(Fun<? super K, ? extends U> transformer,
3580	<	Action<U> action) {
3581	<	fjp.invoke(ForkJoinTasks.forEachKey
3582	<	(ConcurrentHashMapV8.this, transformer, action));
3583	<	}
3570	>	/**
3571	>	* Returns the result of accumulating all keys using the given
3572	>	* reducer to combine values, or null if none.
3573	>	*
3574	>	* @param reducer a commutative associative combining function
3575	>	* @return the result of accumulating all keys using the given
3576	>	* reducer to combine values, or null if none
3577	>	*/
3578	>	@SuppressWarnings("unchecked") public K reduceKeysSequentially
3579	>	(BiFun<? super K, ? super K, ? extends K> reducer) {
3580	>	if (reducer == null) throw new NullPointerException();
3581	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3582	>	K r = null;
3583	>	while (it.advance() != null) {
3584	>	K u = (K)it.nextKey;
3585	>	r = (r == null) ? u : reducer.apply(r, u);
3586	>	}
3587	>	return r;
3588	>	}
3589
3590	<	/**
3591	<	* Returns a non-null result from applying the given search
3592	<	* function on each key, or null if none. Upon success,
3593	<	* further element processing is suppressed and the results of
3594	<	* any other parallel invocations of the search function are
3595	<	* ignored.
3596	<	*
3597	<	* @param searchFunction a function returning a non-null
3598	<	* result on success, else null
3599	<	* @return a non-null result from applying the given search
3600	<	* function on each key, or null if none
3601	<	*/
3602	<	public <U> U searchKeys(Fun<? super K, ? extends U> searchFunction) {
3603	<	return fjp.invoke(ForkJoinTasks.searchKeys
3604	<	(ConcurrentHashMapV8.this, searchFunction));
3590	>	/**
3591	>	* Returns the result of accumulating the given transformation
3592	>	* of all keys using the given reducer to combine values, or
3593	>	* null if none.
3594	>	*
3595	>	* @param transformer a function returning the transformation
3596	>	* for an element, or null of there is no transformation (in
3597	>	* which case it is not combined).
3598	>	* @param reducer a commutative associative combining function
3599	>	* @return the result of accumulating the given transformation
3600	>	* of all keys
3601	>	*/
3602	>	@SuppressWarnings("unchecked") public <U> U reduceKeysSequentially
3603	>	(Fun<? super K, ? extends U> transformer,
3604	>	BiFun<? super U, ? super U, ? extends U> reducer) {
3605	>	if (transformer == null || reducer == null)
3606	>	throw new NullPointerException();
3607	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3608	>	U r = null, u;
3609	>	while (it.advance() != null) {
3610	>	if ((u = transformer.apply((K)it.nextKey)) != null)
3611	>	r = (r == null) ? u : reducer.apply(r, u);
3612	>	}
3613	>	return r;
3614	>	}
3615	>
3616	>	/**
3617	>	* Returns the result of accumulating the given transformation
3618	>	* of all keys using the given reducer to combine values, and
3619	>	* the given basis as an identity value.
3620	>	*
3621	>	* @param transformer a function returning the transformation
3622	>	* for an element
3623	>	* @param basis the identity (initial default value) for the reduction
3624	>	* @param reducer a commutative associative combining function
3625	>	* @return  the result of accumulating the given transformation
3626	>	* of all keys
3627	>	*/
3628	>	@SuppressWarnings("unchecked") public double reduceKeysToDoubleSequentially
3629	>	(ObjectToDouble<? super K> transformer,
3630	>	double basis,
3631	>	DoubleByDoubleToDouble reducer) {
3632	>	if (transformer == null || reducer == null)
3633	>	throw new NullPointerException();
3634	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3635	>	double r = basis;
3636	>	while (it.advance() != null)
3637	>	r = reducer.apply(r, transformer.apply((K)it.nextKey));
3638	>	return r;
3639	>	}
3640	>
3641	>	/**
3642	>	* Returns the result of accumulating the given transformation
3643	>	* of all keys using the given reducer to combine values, and
3644	>	* the given basis as an identity value.
3645	>	*
3646	>	* @param transformer a function returning the transformation
3647	>	* for an element
3648	>	* @param basis the identity (initial default value) for the reduction
3649	>	* @param reducer a commutative associative combining function
3650	>	* @return the result of accumulating the given transformation
3651	>	* of all keys
3652	>	*/
3653	>	@SuppressWarnings("unchecked") public long reduceKeysToLongSequentially
3654	>	(ObjectToLong<? super K> transformer,
3655	>	long basis,
3656	>	LongByLongToLong reducer) {
3657	>	if (transformer == null || reducer == null)
3658	>	throw new NullPointerException();
3659	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3660	>	long r = basis;
3661	>	while (it.advance() != null)
3662	>	r = reducer.apply(r, transformer.apply((K)it.nextKey));
3663	>	return r;
3664	>	}
3665	>
3666	>	/**
3667	>	* Returns the result of accumulating the given transformation
3668	>	* of all keys using the given reducer to combine values, and
3669	>	* the given basis as an identity value.
3670	>	*
3671	>	* @param transformer a function returning the transformation
3672	>	* for an element
3673	>	* @param basis the identity (initial default value) for the reduction
3674	>	* @param reducer a commutative associative combining function
3675	>	* @return the result of accumulating the given transformation
3676	>	* of all keys
3677	>	*/
3678	>	@SuppressWarnings("unchecked") public int reduceKeysToIntSequentially
3679	>	(ObjectToInt<? super K> transformer,
3680	>	int basis,
3681	>	IntByIntToInt reducer) {
3682	>	if (transformer == null || reducer == null)
3683	>	throw new NullPointerException();
3684	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3685	>	int r = basis;
3686	>	while (it.advance() != null)
3687	>	r = reducer.apply(r, transformer.apply((K)it.nextKey));
3688	>	return r;
3689	>	}
3690	>
3691	>	/**
3692	>	* Performs the given action for each value.
3693	>	*
3694	>	* @param action the action
3695	>	*/
3696	>	public void forEachValueSequentially(Action<V> action) {
3697	>	if (action == null) throw new NullPointerException();
3698	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3699	>	V v;
3700	>	while ((v = it.advance()) != null)
3701	>	action.apply(v);
3702	>	}
3703	>
3704	>	/**
3705	>	* Performs the given action for each non-null transformation
3706	>	* of each value.
3707	>	*
3708	>	* @param transformer a function returning the transformation
3709	>	* for an element, or null of there is no transformation (in
3710	>	* which case the action is not applied).
3711	>	*/
3712	>	public <U> void forEachValueSequentially
3713	>	(Fun<? super V, ? extends U> transformer,
3714	>	Action<U> action) {
3715	>	if (transformer == null || action == null)
3716	>	throw new NullPointerException();
3717	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3718	>	V v; U u;
3719	>	while ((v = it.advance()) != null) {
3720	>	if ((u = transformer.apply(v)) != null)
3721	>	action.apply(u);
3722		}
3723	+	}
3724
3725	<	/**
3726	<	* Returns the result of accumulating all keys using the given
3727	<	* reducer to combine values, or null if none.
3728	<	*
3729	<	* @param reducer a commutative associative combining function
3730	<	* @return the result of accumulating all keys using the given
3731	<	* reducer to combine values, or null if none
3732	<	*/
3733	<	public K reduceKeys(BiFun<? super K, ? super K, ? extends K> reducer) {
3734	<	return fjp.invoke(ForkJoinTasks.reduceKeys
3735	<	(ConcurrentHashMapV8.this, reducer));
3725	>	/**
3726	>	* Returns a non-null result from applying the given search
3727	>	* function on each value, or null if none.
3728	>	*
3729	>	* @param searchFunction a function returning a non-null
3730	>	* result on success, else null
3731	>	* @return a non-null result from applying the given search
3732	>	* function on each value, or null if none
3733	>	*
3734	>	*/
3735	>	public <U> U searchValuesSequentially
3736	>	(Fun<? super V, ? extends U> searchFunction) {
3737	>	if (searchFunction == null) throw new NullPointerException();
3738	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3739	>	V v; U u;
3740	>	while ((v = it.advance()) != null) {
3741	>	if ((u = searchFunction.apply(v)) != null)
3742	>	return u;
3743		}
3744	+	return null;
3745	+	}
3746
3747	<	/**
3748	<	* Returns the result of accumulating the given transformation
3749	<	* of all keys 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 keys
3758	<	*/
3759	<	public <U> U reduceKeys(Fun<? super K, ? extends U> transformer,
3760	<	BiFun<? super U, ? super U, ? extends U> reducer) {
3761	<	return fjp.invoke(ForkJoinTasks.reduceKeys
3762	<	(ConcurrentHashMapV8.this, transformer, reducer));
3747	>	/**
3748	>	* Returns the result of accumulating all values using the
3749	>	* given reducer to combine values, or null if none.
3750	>	*
3751	>	* @param reducer a commutative associative combining function
3752	>	* @return  the result of accumulating all values
3753	>	*/
3754	>	public V reduceValuesSequentially
3755	>	(BiFun<? super V, ? super V, ? extends V> reducer) {
3756	>	if (reducer == null) throw new NullPointerException();
3757	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3758	>	V r = null; V v;
3759	>	while ((v = it.advance()) != null)
3760	>	r = (r == null) ? v : reducer.apply(r, v);
3761	>	return r;
3762	>	}
3763	>
3764	>	/**
3765	>	* Returns the result of accumulating the given transformation
3766	>	* of all values using the given reducer to combine values, or
3767	>	* null if none.
3768	>	*
3769	>	* @param transformer a function returning the transformation
3770	>	* for an element, or null of there is no transformation (in
3771	>	* which case it is not combined).
3772	>	* @param reducer a commutative associative combining function
3773	>	* @return the result of accumulating the given transformation
3774	>	* of all values
3775	>	*/
3776	>	public <U> U reduceValuesSequentially
3777	>	(Fun<? super V, ? extends U> transformer,
3778	>	BiFun<? super U, ? super U, ? extends U> reducer) {
3779	>	if (transformer == null || reducer == null)
3780	>	throw new NullPointerException();
3781	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3782	>	U r = null, u; V v;
3783	>	while ((v = it.advance()) != null) {
3784	>	if ((u = transformer.apply(v)) != null)
3785	>	r = (r == null) ? u : reducer.apply(r, u);
3786		}
3787	+	return r;
3788	+	}
3789
3790	<	/**
3791	<	* Returns the result of accumulating the given transformation
3792	<	* of all keys using the given reducer to combine values, and
3793	<	* the given basis as an identity value.
3794	<	*
3795	<	* @param transformer a function returning the transformation
3796	<	* for an element
3797	<	* @param basis the identity (initial default value) for the reduction
3798	<	* @param reducer a commutative associative combining function
3799	<	* @return  the result of accumulating the given transformation
3800	<	* of all keys
3801	<	*/
3802	<	public double reduceKeysToDouble(ObjectToDouble<? super K> transformer,
3803	<	double basis,
3804	<	DoubleByDoubleToDouble reducer) {
3805	<	return fjp.invoke(ForkJoinTasks.reduceKeysToDouble
3806	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
3790	>	/**
3791	>	* Returns the result of accumulating the given transformation
3792	>	* of all values using the given reducer to combine values,
3793	>	* and the given basis as an identity value.
3794	>	*
3795	>	* @param transformer a function returning the transformation
3796	>	* for an element
3797	>	* @param basis the identity (initial default value) for the reduction
3798	>	* @param reducer a commutative associative combining function
3799	>	* @return the result of accumulating the given transformation
3800	>	* of all values
3801	>	*/
3802	>	public double reduceValuesToDoubleSequentially
3803	>	(ObjectToDouble<? super V> transformer,
3804	>	double basis,
3805	>	DoubleByDoubleToDouble reducer) {
3806	>	if (transformer == null || reducer == null)
3807	>	throw new NullPointerException();
3808	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3809	>	double r = basis; V v;
3810	>	while ((v = it.advance()) != null)
3811	>	r = reducer.apply(r, transformer.apply(v));
3812	>	return r;
3813	>	}
3814	>
3815	>	/**
3816	>	* Returns the result of accumulating the given transformation
3817	>	* of all values using the given reducer to combine values,
3818	>	* and the given basis as an identity value.
3819	>	*
3820	>	* @param transformer a function returning the transformation
3821	>	* for an element
3822	>	* @param basis the identity (initial default value) for the reduction
3823	>	* @param reducer a commutative associative combining function
3824	>	* @return the result of accumulating the given transformation
3825	>	* of all values
3826	>	*/
3827	>	public long reduceValuesToLongSequentially
3828	>	(ObjectToLong<? super V> transformer,
3829	>	long basis,
3830	>	LongByLongToLong reducer) {
3831	>	if (transformer == null || reducer == null)
3832	>	throw new NullPointerException();
3833	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3834	>	long r = basis; V v;
3835	>	while ((v = it.advance()) != null)
3836	>	r = reducer.apply(r, transformer.apply(v));
3837	>	return r;
3838	>	}
3839	>
3840	>	/**
3841	>	* Returns the result of accumulating the given transformation
3842	>	* of all values using the given reducer to combine values,
3843	>	* and the given basis as an identity value.
3844	>	*
3845	>	* @param transformer a function returning the transformation
3846	>	* for an element
3847	>	* @param basis the identity (initial default value) for the reduction
3848	>	* @param reducer a commutative associative combining function
3849	>	* @return the result of accumulating the given transformation
3850	>	* of all values
3851	>	*/
3852	>	public int reduceValuesToIntSequentially
3853	>	(ObjectToInt<? super V> transformer,
3854	>	int basis,
3855	>	IntByIntToInt reducer) {
3856	>	if (transformer == null || reducer == null)
3857	>	throw new NullPointerException();
3858	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3859	>	int r = basis; V v;
3860	>	while ((v = it.advance()) != null)
3861	>	r = reducer.apply(r, transformer.apply(v));
3862	>	return r;
3863	>	}
3864	>
3865	>	/**
3866	>	* Performs the given action for each entry.
3867	>	*
3868	>	* @param action the action
3869	>	*/
3870	>	@SuppressWarnings("unchecked") public void forEachEntrySequentially
3871	>	(Action<Map.Entry<K,V>> action) {
3872	>	if (action == null) throw new NullPointerException();
3873	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3874	>	V v;
3875	>	while ((v = it.advance()) != null)
3876	>	action.apply(entryFor((K)it.nextKey, v));
3877	>	}
3878	>
3879	>	/**
3880	>	* Performs the given action for each non-null transformation
3881	>	* of each entry.
3882	>	*
3883	>	* @param transformer a function returning the transformation
3884	>	* for an element, or null of there is no transformation (in
3885	>	* which case the action is not applied).
3886	>	* @param action the action
3887	>	*/
3888	>	@SuppressWarnings("unchecked") public <U> void forEachEntrySequentially
3889	>	(Fun<Map.Entry<K,V>, ? extends U> transformer,
3890	>	Action<U> action) {
3891	>	if (transformer == null || action == null)
3892	>	throw new NullPointerException();
3893	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3894	>	V v; U u;
3895	>	while ((v = it.advance()) != null) {
3896	>	if ((u = transformer.apply(entryFor((K)it.nextKey, v))) != null)
3897	>	action.apply(u);
3898		}
3899	+	}
3900
3901	<	/**
3902	<	* Returns the result of accumulating the given transformation
3903	<	* of all keys using the given reducer to combine values, and
3904	<	* the given basis as an identity value.
3905	<	*
3906	<	* @param transformer a function returning the transformation
3907	<	* for an element
3908	<	* @param basis the identity (initial default value) for the reduction
3909	<	* @param reducer a commutative associative combining function
3910	<	* @return the result of accumulating the given transformation
3911	<	* of all keys
3912	<	*/
3913	<	public long reduceKeysToLong(ObjectToLong<? super K> transformer,
3914	<	long basis,
3915	<	LongByLongToLong reducer) {
3916	<	return fjp.invoke(ForkJoinTasks.reduceKeysToLong
3917	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
3901	>	/**
3902	>	* Returns a non-null result from applying the given search
3903	>	* function on each entry, or null if none.
3904	>	*
3905	>	* @param searchFunction a function returning a non-null
3906	>	* result on success, else null
3907	>	* @return a non-null result from applying the given search
3908	>	* function on each entry, or null if none
3909	>	*/
3910	>	@SuppressWarnings("unchecked") public <U> U searchEntriesSequentially
3911	>	(Fun<Map.Entry<K,V>, ? extends U> searchFunction) {
3912	>	if (searchFunction == null) throw new NullPointerException();
3913	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3914	>	V v; U u;
3915	>	while ((v = it.advance()) != null) {
3916	>	if ((u = searchFunction.apply(entryFor((K)it.nextKey, v))) != null)
3917	>	return u;
3918		}
3919	+	return null;
3920	+	}
3921
3922	<	/**
3923	<	* Returns the result of accumulating the given transformation
3924	<	* of all keys using the given reducer to combine values, and
3925	<	* the given basis as an identity value.
3926	<	*
3927	<	* @param transformer a function returning the transformation
3928	<	* for an element
3929	<	* @param basis the identity (initial default value) for the reduction
3930	<	* @param reducer a commutative associative combining function
3931	<	* @return the result of accumulating the given transformation
3932	<	* of all keys
3933	<	*/
3934	<	public int reduceKeysToInt(ObjectToInt<? super K> transformer,
3935	<	int basis,
3936	<	IntByIntToInt reducer) {
3902	<	return fjp.invoke(ForkJoinTasks.reduceKeysToInt
3903	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
3922	>	/**
3923	>	* Returns the result of accumulating all entries using the
3924	>	* given reducer to combine values, or null if none.
3925	>	*
3926	>	* @param reducer a commutative associative combining function
3927	>	* @return the result of accumulating all entries
3928	>	*/
3929	>	@SuppressWarnings("unchecked") public Map.Entry<K,V> reduceEntriesSequentially
3930	>	(BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
3931	>	if (reducer == null) throw new NullPointerException();
3932	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3933	>	Map.Entry<K,V> r = null; V v;
3934	>	while ((v = it.advance()) != null) {
3935	>	Map.Entry<K,V> u = entryFor((K)it.nextKey, v);
3936	>	r = (r == null) ? u : reducer.apply(r, u);
3937		}
3938	+	return r;
3939	+	}
3940
3941	<	/**
3942	<	* Performs the given action for each value.
3943	<	*
3944	<	* @param action the action
3945	<	*/
3946	<	public void forEachValue(Action<V> action) {
3947	<	fjp.invoke(ForkJoinTasks.forEachValue
3948	<	(ConcurrentHashMapV8.this, action));
3941	>	/**
3942	>	* Returns the result of accumulating the given transformation
3943	>	* of all entries using the given reducer to combine values,
3944	>	* or null if none.
3945	>	*
3946	>	* @param transformer a function returning the transformation
3947	>	* for an element, or null of there is no transformation (in
3948	>	* which case it is not combined).
3949	>	* @param reducer a commutative associative combining function
3950	>	* @return the result of accumulating the given transformation
3951	>	* of all entries
3952	>	*/
3953	>	@SuppressWarnings("unchecked") public <U> U reduceEntriesSequentially
3954	>	(Fun<Map.Entry<K,V>, ? extends U> transformer,
3955	>	BiFun<? super U, ? super U, ? extends U> reducer) {
3956	>	if (transformer == null || reducer == null)
3957	>	throw new NullPointerException();
3958	>	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3959	>	U r = null, u; V v;
3960	>	while ((v = it.advance()) != null) {
3961	>	if ((u = transformer.apply(entryFor((K)it.nextKey, v))) != null)
3962	>	r = (r == null) ? u : reducer.apply(r, u);
3963		}
3964	+	return r;
3965	+	}
3966	+
3967	+	/**
3968	+	* Returns the result of accumulating the given transformation
3969	+	* of all entries using the given reducer to combine values,
3970	+	* and the given basis as an identity value.
3971	+	*
3972	+	* @param transformer a function returning the transformation
3973	+	* for an element
3974	+	* @param basis the identity (initial default value) for the reduction
3975	+	* @param reducer a commutative associative combining function
3976	+	* @return the result of accumulating the given transformation
3977	+	* of all entries
3978	+	*/
3979	+	@SuppressWarnings("unchecked") public double reduceEntriesToDoubleSequentially
3980	+	(ObjectToDouble<Map.Entry<K,V>> transformer,
3981	+	double basis,
3982	+	DoubleByDoubleToDouble reducer) {
3983	+	if (transformer == null || reducer == null)
3984	+	throw new NullPointerException();
3985	+	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
3986	+	double r = basis; V v;
3987	+	while ((v = it.advance()) != null)
3988	+	r = reducer.apply(r, transformer.apply(entryFor((K)it.nextKey, v)));
3989	+	return r;
3990	+	}
3991	+
3992	+	/**
3993	+	* Returns the result of accumulating the given transformation
3994	+	* of all entries using the given reducer to combine values,
3995	+	* and the given basis as an identity value.
3996	+	*
3997	+	* @param transformer a function returning the transformation
3998	+	* for an element
3999	+	* @param basis the identity (initial default value) for the reduction
4000	+	* @param reducer a commutative associative combining function
4001	+	* @return  the result of accumulating the given transformation
4002	+	* of all entries
4003	+	*/
4004	+	@SuppressWarnings("unchecked") public long reduceEntriesToLongSequentially
4005	+	(ObjectToLong<Map.Entry<K,V>> transformer,
4006	+	long basis,
4007	+	LongByLongToLong reducer) {
4008	+	if (transformer == null || reducer == null)
4009	+	throw new NullPointerException();
4010	+	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
4011	+	long r = basis; V v;
4012	+	while ((v = it.advance()) != null)
4013	+	r = reducer.apply(r, transformer.apply(entryFor((K)it.nextKey, v)));
4014	+	return r;
4015	+	}
4016	+
4017	+	/**
4018	+	* Returns the result of accumulating the given transformation
4019	+	* of all entries using the given reducer to combine values,
4020	+	* and the given basis as an identity value.
4021	+	*
4022	+	* @param transformer a function returning the transformation
4023	+	* for an element
4024	+	* @param basis the identity (initial default value) for the reduction
4025	+	* @param reducer a commutative associative combining function
4026	+	* @return the result of accumulating the given transformation
4027	+	* of all entries
4028	+	*/
4029	+	@SuppressWarnings("unchecked") public int reduceEntriesToIntSequentially
4030	+	(ObjectToInt<Map.Entry<K,V>> transformer,
4031	+	int basis,
4032	+	IntByIntToInt reducer) {
4033	+	if (transformer == null || reducer == null)
4034	+	throw new NullPointerException();
4035	+	Traverser<K,V,Object> it = new Traverser<K,V,Object>(this);
4036	+	int r = basis; V v;
4037	+	while ((v = it.advance()) != null)
4038	+	r = reducer.apply(r, transformer.apply(entryFor((K)it.nextKey, v)));
4039	+	return r;
4040	+	}
4041	+
4042	+	// Parallel bulk operations
4043	+
4044	+	/**
4045	+	* Performs the given action for each (key, value).
4046	+	*
4047	+	* @param action the action
4048	+	*/
4049	+	public void forEachInParallel(BiAction<K,V> action) {
4050	+	ForkJoinTasks.forEach
4051	+	(this, action).invoke();
4052	+	}
4053	+
4054	+	/**
4055	+	* Performs the given action for each non-null transformation
4056	+	* of each (key, value).
4057	+	*
4058	+	* @param transformer a function returning the transformation
4059	+	* for an element, or null of there is no transformation (in
4060	+	* which case the action is not applied).
4061	+	* @param action the action
4062	+	*/
4063	+	public <U> void forEachInParallel
4064	+	(BiFun<? super K, ? super V, ? extends U> transformer,
4065	+	Action<U> action) {
4066	+	ForkJoinTasks.forEach
4067	+	(this, transformer, action).invoke();
4068	+	}
4069	+
4070	+	/**
4071	+	* Returns a non-null result from applying the given search
4072	+	* function on each (key, value), or null if none.  Upon
4073	+	* success, further element processing is suppressed and the
4074	+	* results of any other parallel invocations of the search
4075	+	* function are ignored.
4076	+	*
4077	+	* @param searchFunction a function returning a non-null
4078	+	* result on success, else null
4079	+	* @return a non-null result from applying the given search
4080	+	* function on each (key, value), or null if none
4081	+	*/
4082	+	public <U> U searchInParallel
4083	+	(BiFun<? super K, ? super V, ? extends U> searchFunction) {
4084	+	return ForkJoinTasks.search
4085	+	(this, searchFunction).invoke();
4086	+	}
4087	+
4088	+	/**
4089	+	* Returns the result of accumulating the given transformation
4090	+	* of all (key, value) pairs using the given reducer to
4091	+	* combine values, or null if none.
4092	+	*
4093	+	* @param transformer a function returning the transformation
4094	+	* for an element, or null of there is no transformation (in
4095	+	* which case it is not combined).
4096	+	* @param reducer a commutative associative combining function
4097	+	* @return the result of accumulating the given transformation
4098	+	* of all (key, value) pairs
4099	+	*/
4100	+	public <U> U reduceInParallel
4101	+	(BiFun<? super K, ? super V, ? extends U> transformer,
4102	+	BiFun<? super U, ? super U, ? extends U> reducer) {
4103	+	return ForkJoinTasks.reduce
4104	+	(this, transformer, reducer).invoke();
4105	+	}
4106	+
4107	+	/**
4108	+	* Returns the result of accumulating the given transformation
4109	+	* of all (key, value) pairs using the given reducer to
4110	+	* combine values, and the given basis as an identity value.
4111	+	*
4112	+	* @param transformer a function returning the transformation
4113	+	* for an element
4114	+	* @param basis the identity (initial default value) for the reduction
4115	+	* @param reducer a commutative associative combining function
4116	+	* @return the result of accumulating the given transformation
4117	+	* of all (key, value) pairs
4118	+	*/
4119	+	public double reduceToDoubleInParallel
4120	+	(ObjectByObjectToDouble<? super K, ? super V> transformer,
4121	+	double basis,
4122	+	DoubleByDoubleToDouble reducer) {
4123	+	return ForkJoinTasks.reduceToDouble
4124	+	(this, transformer, basis, reducer).invoke();
4125	+	}
4126	+
4127	+	/**
4128	+	* Returns the result of accumulating the given transformation
4129	+	* of all (key, value) pairs using the given reducer to
4130	+	* combine values, and the given basis as an identity value.
4131	+	*
4132	+	* @param transformer a function returning the transformation
4133	+	* for an element
4134	+	* @param basis the identity (initial default value) for the reduction
4135	+	* @param reducer a commutative associative combining function
4136	+	* @return the result of accumulating the given transformation
4137	+	* of all (key, value) pairs
4138	+	*/
4139	+	public long reduceToLongInParallel
4140	+	(ObjectByObjectToLong<? super K, ? super V> transformer,
4141	+	long basis,
4142	+	LongByLongToLong reducer) {
4143	+	return ForkJoinTasks.reduceToLong
4144	+	(this, transformer, basis, reducer).invoke();
4145	+	}
4146	+
4147	+	/**
4148	+	* Returns the result of accumulating the given transformation
4149	+	* of all (key, value) pairs using the given reducer to
4150	+	* combine values, and the given basis as an identity value.
4151	+	*
4152	+	* @param transformer a function returning the transformation
4153	+	* for an element
4154	+	* @param basis the identity (initial default value) for the reduction
4155	+	* @param reducer a commutative associative combining function
4156	+	* @return the result of accumulating the given transformation
4157	+	* of all (key, value) pairs
4158	+	*/
4159	+	public int reduceToIntInParallel
4160	+	(ObjectByObjectToInt<? super K, ? super V> transformer,
4161	+	int basis,
4162	+	IntByIntToInt reducer) {
4163	+	return ForkJoinTasks.reduceToInt
4164	+	(this, transformer, basis, reducer).invoke();
4165	+	}
4166	+
4167	+	/**
4168	+	* Performs the given action for each key.
4169	+	*
4170	+	* @param action the action
4171	+	*/
4172	+	public void forEachKeyInParallel(Action<K> action) {
4173	+	ForkJoinTasks.forEachKey
4174	+	(this, action).invoke();
4175	+	}
4176	+
4177	+	/**
4178	+	* Performs the given action for each non-null transformation
4179	+	* of each key.
4180	+	*
4181	+	* @param transformer a function returning the transformation
4182	+	* for an element, or null of there is no transformation (in
4183	+	* which case the action is not applied).
4184	+	* @param action the action
4185	+	*/
4186	+	public <U> void forEachKeyInParallel
4187	+	(Fun<? super K, ? extends U> transformer,
4188	+	Action<U> action) {
4189	+	ForkJoinTasks.forEachKey
4190	+	(this, transformer, action).invoke();
4191	+	}
4192	+
4193	+	/**
4194	+	* Returns a non-null result from applying the given search
4195	+	* function on each key, or null if none. Upon success,
4196	+	* further element processing is suppressed and the results of
4197	+	* any other parallel invocations of the search function are
4198	+	* ignored.
4199	+	*
4200	+	* @param searchFunction a function returning a non-null
4201	+	* result on success, else null
4202	+	* @return a non-null result from applying the given search
4203	+	* function on each key, or null if none
4204	+	*/
4205	+	public <U> U searchKeysInParallel
4206	+	(Fun<? super K, ? extends U> searchFunction) {
4207	+	return ForkJoinTasks.searchKeys
4208	+	(this, searchFunction).invoke();
4209	+	}
4210	+
4211	+	/**
4212	+	* Returns the result of accumulating all keys using the given
4213	+	* reducer to combine values, or null if none.
4214	+	*
4215	+	* @param reducer a commutative associative combining function
4216	+	* @return the result of accumulating all keys using the given
4217	+	* reducer to combine values, or null if none
4218	+	*/
4219	+	public K reduceKeysInParallel
4220	+	(BiFun<? super K, ? super K, ? extends K> reducer) {
4221	+	return ForkJoinTasks.reduceKeys
4222	+	(this, reducer).invoke();
4223	+	}
4224	+
4225	+	/**
4226	+	* Returns the result of accumulating the given transformation
4227	+	* of all keys using the given reducer to combine values, or
4228	+	* null if none.
4229	+	*
4230	+	* @param transformer a function returning the transformation
4231	+	* for an element, or null of there is no transformation (in
4232	+	* which case it is not combined).
4233	+	* @param reducer a commutative associative combining function
4234	+	* @return the result of accumulating the given transformation
4235	+	* of all keys
4236	+	*/
4237	+	public <U> U reduceKeysInParallel
4238	+	(Fun<? super K, ? extends U> transformer,
4239	+	BiFun<? super U, ? super U, ? extends U> reducer) {
4240	+	return ForkJoinTasks.reduceKeys
4241	+	(this, transformer, reducer).invoke();
4242	+	}
4243	+
4244	+	/**
4245	+	* Returns the result of accumulating the given transformation
4246	+	* of all keys using the given reducer to combine values, and
4247	+	* the given basis as an identity value.
4248	+	*
4249	+	* @param transformer a function returning the transformation
4250	+	* for an element
4251	+	* @param basis the identity (initial default value) for the reduction
4252	+	* @param reducer a commutative associative combining function
4253	+	* @return  the result of accumulating the given transformation
4254	+	* of all keys
4255	+	*/
4256	+	public double reduceKeysToDoubleInParallel
4257	+	(ObjectToDouble<? super K> transformer,
4258	+	double basis,
4259	+	DoubleByDoubleToDouble reducer) {
4260	+	return ForkJoinTasks.reduceKeysToDouble
4261	+	(this, transformer, basis, reducer).invoke();
4262	+	}
4263	+
4264	+	/**
4265	+	* Returns the result of accumulating the given transformation
4266	+	* of all keys using the given reducer to combine values, and
4267	+	* the given basis as an identity value.
4268	+	*
4269	+	* @param transformer a function returning the transformation
4270	+	* for an element
4271	+	* @param basis the identity (initial default value) for the reduction
4272	+	* @param reducer a commutative associative combining function
4273	+	* @return the result of accumulating the given transformation
4274	+	* of all keys
4275	+	*/
4276	+	public long reduceKeysToLongInParallel
4277	+	(ObjectToLong<? super K> transformer,
4278	+	long basis,
4279	+	LongByLongToLong reducer) {
4280	+	return ForkJoinTasks.reduceKeysToLong
4281	+	(this, transformer, basis, reducer).invoke();
4282	+	}
4283	+
4284	+	/**
4285	+	* Returns the result of accumulating the given transformation
4286	+	* of all keys using the given reducer to combine values, and
4287	+	* the given basis as an identity value.
4288	+	*
4289	+	* @param transformer a function returning the transformation
4290	+	* for an element
4291	+	* @param basis the identity (initial default value) for the reduction
4292	+	* @param reducer a commutative associative combining function
4293	+	* @return the result of accumulating the given transformation
4294	+	* of all keys
4295	+	*/
4296	+	public int reduceKeysToIntInParallel
4297	+	(ObjectToInt<? super K> transformer,
4298	+	int basis,
4299	+	IntByIntToInt reducer) {
4300	+	return ForkJoinTasks.reduceKeysToInt
4301	+	(this, transformer, basis, reducer).invoke();
4302	+	}
4303	+
4304	+	/**
4305	+	* Performs the given action for each value.
4306	+	*
4307	+	* @param action the action
4308	+	*/
4309	+	public void forEachValueInParallel(Action<V> action) {
4310	+	ForkJoinTasks.forEachValue
4311	+	(this, action).invoke();
4312	+	}
4313	+
4314	+	/**
4315	+	* Performs the given action for each non-null transformation
4316	+	* of each value.
4317	+	*
4318	+	* @param transformer a function returning the transformation
4319	+	* for an element, or null of there is no transformation (in
4320	+	* which case the action is not applied).
4321	+	*/
4322	+	public <U> void forEachValueInParallel
4323	+	(Fun<? super V, ? extends U> transformer,
4324	+	Action<U> action) {
4325	+	ForkJoinTasks.forEachValue
4326	+	(this, transformer, action).invoke();
4327	+	}
4328	+
4329	+	/**
4330	+	* Returns a non-null result from applying the given search
4331	+	* function on each value, or null if none.  Upon success,
4332	+	* further element processing is suppressed and the results of
4333	+	* any other parallel invocations of the search function are
4334	+	* ignored.
4335	+	*
4336	+	* @param searchFunction a function returning a non-null
4337	+	* result on success, else null
4338	+	* @return a non-null result from applying the given search
4339	+	* function on each value, or null if none
4340	+	*
4341	+	*/
4342	+	public <U> U searchValuesInParallel
4343	+	(Fun<? super V, ? extends U> searchFunction) {
4344	+	return ForkJoinTasks.searchValues
4345	+	(this, searchFunction).invoke();
4346	+	}
4347	+
4348	+	/**
4349	+	* Returns the result of accumulating all values using the
4350	+	* given reducer to combine values, or null if none.
4351	+	*
4352	+	* @param reducer a commutative associative combining function
4353	+	* @return  the result of accumulating all values
4354	+	*/
4355	+	public V reduceValuesInParallel
4356	+	(BiFun<? super V, ? super V, ? extends V> reducer) {
4357	+	return ForkJoinTasks.reduceValues
4358	+	(this, reducer).invoke();
4359	+	}
4360	+
4361	+	/**
4362	+	* Returns the result of accumulating the given transformation
4363	+	* of all values using the given reducer to combine values, or
4364	+	* null if none.
4365	+	*
4366	+	* @param transformer a function returning the transformation
4367	+	* for an element, or null of there is no transformation (in
4368	+	* which case it is not combined).
4369	+	* @param reducer a commutative associative combining function
4370	+	* @return the result of accumulating the given transformation
4371	+	* of all values
4372	+	*/
4373	+	public <U> U reduceValuesInParallel
4374	+	(Fun<? super V, ? extends U> transformer,
4375	+	BiFun<? super U, ? super U, ? extends U> reducer) {
4376	+	return ForkJoinTasks.reduceValues
4377	+	(this, transformer, reducer).invoke();
4378	+	}
4379	+
4380	+	/**
4381	+	* Returns the result of accumulating the given transformation
4382	+	* of all values using the given reducer to combine values,
4383	+	* and the given basis as an identity value.
4384	+	*
4385	+	* @param transformer a function returning the transformation
4386	+	* for an element
4387	+	* @param basis the identity (initial default value) for the reduction
4388	+	* @param reducer a commutative associative combining function
4389	+	* @return the result of accumulating the given transformation
4390	+	* of all values
4391	+	*/
4392	+	public double reduceValuesToDoubleInParallel
4393	+	(ObjectToDouble<? super V> transformer,
4394	+	double basis,
4395	+	DoubleByDoubleToDouble reducer) {
4396	+	return ForkJoinTasks.reduceValuesToDouble
4397	+	(this, transformer, basis, reducer).invoke();
4398	+	}
4399	+
4400	+	/**
4401	+	* Returns the result of accumulating the given transformation
4402	+	* of all values using the given reducer to combine values,
4403	+	* and the given basis as an identity value.
4404	+	*
4405	+	* @param transformer a function returning the transformation
4406	+	* for an element
4407	+	* @param basis the identity (initial default value) for the reduction
4408	+	* @param reducer a commutative associative combining function
4409	+	* @return the result of accumulating the given transformation
4410	+	* of all values
4411	+	*/
4412	+	public long reduceValuesToLongInParallel
4413	+	(ObjectToLong<? super V> transformer,
4414	+	long basis,
4415	+	LongByLongToLong reducer) {
4416	+	return ForkJoinTasks.reduceValuesToLong
4417	+	(this, transformer, basis, reducer).invoke();
4418	+	}
4419	+
4420	+	/**
4421	+	* Returns the result of accumulating the given transformation
4422	+	* of all values using the given reducer to combine values,
4423	+	* and the given basis as an identity value.
4424	+	*
4425	+	* @param transformer a function returning the transformation
4426	+	* for an element
4427	+	* @param basis the identity (initial default value) for the reduction
4428	+	* @param reducer a commutative associative combining function
4429	+	* @return the result of accumulating the given transformation
4430	+	* of all values
4431	+	*/
4432	+	public int reduceValuesToIntInParallel
4433	+	(ObjectToInt<? super V> transformer,
4434	+	int basis,
4435	+	IntByIntToInt reducer) {
4436	+	return ForkJoinTasks.reduceValuesToInt
4437	+	(this, transformer, basis, reducer).invoke();
4438	+	}
4439	+
4440	+	/**
4441	+	* Performs the given action for each entry.
4442	+	*
4443	+	* @param action the action
4444	+	*/
4445	+	public void forEachEntryInParallel(Action<Map.Entry<K,V>> action) {
4446	+	ForkJoinTasks.forEachEntry
4447	+	(this, action).invoke();
4448	+	}
4449	+
4450	+	/**
4451	+	* Performs the given action for each non-null transformation
4452	+	* of each entry.
4453	+	*
4454	+	* @param transformer a function returning the transformation
4455	+	* for an element, or null of there is no transformation (in
4456	+	* which case the action is not applied).
4457	+	* @param action the action
4458	+	*/
4459	+	public <U> void forEachEntryInParallel
4460	+	(Fun<Map.Entry<K,V>, ? extends U> transformer,
4461	+	Action<U> action) {
4462	+	ForkJoinTasks.forEachEntry
4463	+	(this, transformer, action).invoke();
4464	+	}
4465	+
4466	+	/**
4467	+	* Returns a non-null result from applying the given search
4468	+	* function on each entry, or null if none.  Upon success,
4469	+	* further element processing is suppressed and the results of
4470	+	* any other parallel invocations of the search function are
4471	+	* ignored.
4472	+	*
4473	+	* @param searchFunction a function returning a non-null
4474	+	* result on success, else null
4475	+	* @return a non-null result from applying the given search
4476	+	* function on each entry, or null if none
4477	+	*/
4478	+	public <U> U searchEntriesInParallel
4479	+	(Fun<Map.Entry<K,V>, ? extends U> searchFunction) {
4480	+	return ForkJoinTasks.searchEntries
4481	+	(this, searchFunction).invoke();
4482	+	}
4483	+
4484	+	/**
4485	+	* Returns the result of accumulating all entries using the
4486	+	* given reducer to combine values, or null if none.
4487	+	*
4488	+	* @param reducer a commutative associative combining function
4489	+	* @return the result of accumulating all entries
4490	+	*/
4491	+	public Map.Entry<K,V> reduceEntriesInParallel
4492	+	(BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
4493	+	return ForkJoinTasks.reduceEntries
4494	+	(this, reducer).invoke();
4495	+	}
4496	+
4497	+	/**
4498	+	* Returns the result of accumulating the given transformation
4499	+	* of all entries using the given reducer to combine values,
4500	+	* or null if none.
4501	+	*
4502	+	* @param transformer a function returning the transformation
4503	+	* for an element, or null of there is no transformation (in
4504	+	* which case it is not combined).
4505	+	* @param reducer a commutative associative combining function
4506	+	* @return the result of accumulating the given transformation
4507	+	* of all entries
4508	+	*/
4509	+	public <U> U reduceEntriesInParallel
4510	+	(Fun<Map.Entry<K,V>, ? extends U> transformer,
4511	+	BiFun<? super U, ? super U, ? extends U> reducer) {
4512	+	return ForkJoinTasks.reduceEntries
4513	+	(this, transformer, reducer).invoke();
4514	+	}
4515	+
4516	+	/**
4517	+	* Returns the result of accumulating the given transformation
4518	+	* of all entries using the given reducer to combine values,
4519	+	* and the given basis as an identity value.
4520	+	*
4521	+	* @param transformer a function returning the transformation
4522	+	* for an element
4523	+	* @param basis the identity (initial default value) for the reduction
4524	+	* @param reducer a commutative associative combining function
4525	+	* @return the result of accumulating the given transformation
4526	+	* of all entries
4527	+	*/
4528	+	public double reduceEntriesToDoubleInParallel
4529	+	(ObjectToDouble<Map.Entry<K,V>> transformer,
4530	+	double basis,
4531	+	DoubleByDoubleToDouble reducer) {
4532	+	return ForkJoinTasks.reduceEntriesToDouble
4533	+	(this, transformer, basis, reducer).invoke();
4534	+	}
4535	+
4536	+	/**
4537	+	* Returns the result of accumulating the given transformation
4538	+	* of all entries using the given reducer to combine values,
4539	+	* and the given basis as an identity value.
4540	+	*
4541	+	* @param transformer a function returning the transformation
4542	+	* for an element
4543	+	* @param basis the identity (initial default value) for the reduction
4544	+	* @param reducer a commutative associative combining function
4545	+	* @return  the result of accumulating the given transformation
4546	+	* of all entries
4547	+	*/
4548	+	public long reduceEntriesToLongInParallel
4549	+	(ObjectToLong<Map.Entry<K,V>> transformer,
4550	+	long basis,
4551	+	LongByLongToLong reducer) {
4552	+	return ForkJoinTasks.reduceEntriesToLong
4553	+	(this, transformer, basis, reducer).invoke();
4554	+	}
4555	+
4556	+	/**
4557	+	* Returns the result of accumulating the given transformation
4558	+	* of all entries using the given reducer to combine values,
4559	+	* and the given basis as an identity value.
4560	+	*
4561	+	* @param transformer a function returning the transformation
4562	+	* for an element
4563	+	* @param basis the identity (initial default value) for the reduction
4564	+	* @param reducer a commutative associative combining function
4565	+	* @return the result of accumulating the given transformation
4566	+	* of all entries
4567	+	*/
4568	+	public int reduceEntriesToIntInParallel
4569	+	(ObjectToInt<Map.Entry<K,V>> transformer,
4570	+	int basis,
4571	+	IntByIntToInt reducer) {
4572	+	return ForkJoinTasks.reduceEntriesToInt
4573	+	(this, transformer, basis, reducer).invoke();
4574	+	}
4575	+
4576	+
4577	+	/* ----------------Views -------------- */
4578	+
4579	+	/**
4580	+	* Base class for views.
4581	+	*/
4582	+	static abstract class CHMView<K, V> {
4583	+	final ConcurrentHashMapV8<K, V> map;
4584	+	CHMView(ConcurrentHashMapV8<K, V> map)  { this.map = map; }
4585
4586		/**
4587	<	* Performs the given action for each non-null transformation
3918	<	* of each value.
4587	>	* Returns the map backing this view.
4588		*
4589	<	* @param transformer a function returning the transformation
3921	<	* for an element, or null of there is no transformation (in
3922	<	* which case the action is not applied).
4589	>	* @return the map backing this view
4590		*/
4591	<	public <U> void forEachValue(Fun<? super V, ? extends U> transformer,
4592	<	Action<U> action) {
4593	<	fjp.invoke(ForkJoinTasks.forEachValue
4594	<	(ConcurrentHashMapV8.this, transformer, action));
4591	>	public ConcurrentHashMapV8<K,V> getMap() { return map; }
4592	>
4593	>	public final int size()                 { return map.size(); }
4594	>	public final boolean isEmpty()          { return map.isEmpty(); }
4595	>	public final void clear()               { map.clear(); }
4596	>
4597	>	// implementations below rely on concrete classes supplying these
4598	>	abstract public Iterator<?> iterator();
4599	>	abstract public boolean contains(Object o);
4600	>	abstract public boolean remove(Object o);
4601	>
4602	>	private static final String oomeMsg = "Required array size too large";
4603	>
4604	>	public final Object[] toArray() {
4605	>	long sz = map.mappingCount();
4606	>	if (sz > (long)(MAX_ARRAY_SIZE))
4607	>	throw new OutOfMemoryError(oomeMsg);
4608	>	int n = (int)sz;
4609	>	Object[] r = new Object[n];
4610	>	int i = 0;
4611	>	Iterator<?> it = iterator();
4612	>	while (it.hasNext()) {
4613	>	if (i == n) {
4614	>	if (n >= MAX_ARRAY_SIZE)
4615	>	throw new OutOfMemoryError(oomeMsg);
4616	>	if (n >= MAX_ARRAY_SIZE - (MAX_ARRAY_SIZE >>> 1) - 1)
4617	>	n = MAX_ARRAY_SIZE;
4618	>	else
4619	>	n += (n >>> 1) + 1;
4620	>	r = Arrays.copyOf(r, n);
4621	>	}
4622	>	r[i++] = it.next();
4623	>	}
4624	>	return (i == n) ? r : Arrays.copyOf(r, i);
4625		}
4626
4627	<	/**
4628	<	* Returns a non-null result from applying the given search
4629	<	* function on each value, or null if none.  Upon success,
4630	<	* further element processing is suppressed and the results of
4631	<	* any other parallel invocations of the search function are
4632	<	* ignored.
4633	<	*
4634	<	* @param searchFunction a function returning a non-null
4635	<	* result on success, else null
4636	<	* @return a non-null result from applying the given search
4637	<	* function on each value, or null if none
4638	<	*
4639	<	*/
4640	<	public <U> U searchValues(Fun<? super V, ? extends U> searchFunction) {
4641	<	return fjp.invoke(ForkJoinTasks.searchValues
4642	<	(ConcurrentHashMapV8.this, searchFunction));
4627	>	@SuppressWarnings("unchecked") public final <T> T[] toArray(T[] a) {
4628	>	long sz = map.mappingCount();
4629	>	if (sz > (long)(MAX_ARRAY_SIZE))
4630	>	throw new OutOfMemoryError(oomeMsg);
4631	>	int m = (int)sz;
4632	>	T[] r = (a.length >= m) ? a :
4633	>	(T[])java.lang.reflect.Array
4634	>	.newInstance(a.getClass().getComponentType(), m);
4635	>	int n = r.length;
4636	>	int i = 0;
4637	>	Iterator<?> it = iterator();
4638	>	while (it.hasNext()) {
4639	>	if (i == n) {
4640	>	if (n >= MAX_ARRAY_SIZE)
4641	>	throw new OutOfMemoryError(oomeMsg);
4642	>	if (n >= MAX_ARRAY_SIZE - (MAX_ARRAY_SIZE >>> 1) - 1)
4643	>	n = MAX_ARRAY_SIZE;
4644	>	else
4645	>	n += (n >>> 1) + 1;
4646	>	r = Arrays.copyOf(r, n);
4647	>	}
4648	>	r[i++] = (T)it.next();
4649	>	}
4650	>	if (a == r && i < n) {
4651	>	r[i] = null; // null-terminate
4652	>	return r;
4653	>	}
4654	>	return (i == n) ? r : Arrays.copyOf(r, i);
4655		}
4656
4657	<	/**
4658	<	* Returns the result of accumulating all values using the
4659	<	* given reducer to combine values, or null if none.
4660	<	*
4661	<	* @param reducer a commutative associative combining function
3953	<	* @return  the result of accumulating all values
3954	<	*/
3955	<	public V reduceValues(BiFun<? super V, ? super V, ? extends V> reducer) {
3956	<	return fjp.invoke(ForkJoinTasks.reduceValues
3957	<	(ConcurrentHashMapV8.this, reducer));
4657	>	public final int hashCode() {
4658	>	int h = 0;
4659	>	for (Iterator<?> it = iterator(); it.hasNext();)
4660	>	h += it.next().hashCode();
4661	>	return h;
4662		}
4663
4664	<	/**
4665	<	* Returns the result of accumulating the given transformation
4666	<	* of all values using the given reducer to combine values, or
4667	<	* null if none.
4668	<	*
4669	<	* @param transformer a function returning the transformation
4670	<	* for an element, or null of there is no transformation (in
4671	<	* which case it is not combined).
4672	<	* @param reducer a commutative associative combining function
4673	<	* @return the result of accumulating the given transformation
4674	<	* of all values
4675	<	*/
4676	<	public <U> U reduceValues(Fun<? super V, ? extends U> transformer,
4677	<	BiFun<? super U, ? super U, ? extends U> reducer) {
3974	<	return fjp.invoke(ForkJoinTasks.reduceValues
3975	<	(ConcurrentHashMapV8.this, transformer, reducer));
4664	>	public final String toString() {
4665	>	StringBuilder sb = new StringBuilder();
4666	>	sb.append('[');
4667	>	Iterator<?> it = iterator();
4668	>	if (it.hasNext()) {
4669	>	for (;;) {
4670	>	Object e = it.next();
4671	>	sb.append(e == this ? "(this Collection)" : e);
4672	>	if (!it.hasNext())
4673	>	break;
4674	>	sb.append(',').append(' ');
4675	>	}
4676	>	}
4677	>	return sb.append(']').toString();
4678		}
4679
4680	<	/**
4681	<	* Returns the result of accumulating the given transformation
4682	<	* of all values using the given reducer to combine values,
4683	<	* and the given basis as an identity value.
4684	<	*
4685	<	* @param transformer a function returning the transformation
4686	<	* for an element
4687	<	* @param basis the identity (initial default value) for the reduction
4688	<	* @param reducer a commutative associative combining function
3987	<	* @return the result of accumulating the given transformation
3988	<	* of all values
3989	<	*/
3990	<	public double reduceValuesToDouble(ObjectToDouble<? super V> transformer,
3991	<	double basis,
3992	<	DoubleByDoubleToDouble reducer) {
3993	<	return fjp.invoke(ForkJoinTasks.reduceValuesToDouble
3994	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
4680	>	public final boolean containsAll(Collection<?> c) {
4681	>	if (c != this) {
4682	>	for (Iterator<?> it = c.iterator(); it.hasNext();) {
4683	>	Object e = it.next();
4684	>	if (e == null || !contains(e))
4685	>	return false;
4686	>	}
4687	>	}
4688	>	return true;
4689		}
4690
4691	<	/**
4692	<	* Returns the result of accumulating the given transformation
4693	<	* of all values using the given reducer to combine values,
4694	<	* and the given basis as an identity value.
4695	<	*
4696	<	* @param transformer a function returning the transformation
4697	<	* for an element
4698	<	* @param basis the identity (initial default value) for the reduction
4699	<	* @param reducer a commutative associative combining function
4006	<	* @return the result of accumulating the given transformation
4007	<	* of all values
4008	<	*/
4009	<	public long reduceValuesToLong(ObjectToLong<? super V> transformer,
4010	<	long basis,
4011	<	LongByLongToLong reducer) {
4012	<	return fjp.invoke(ForkJoinTasks.reduceValuesToLong
4013	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
4691	>	public final boolean removeAll(Collection<?> c) {
4692	>	boolean modified = false;
4693	>	for (Iterator<?> it = iterator(); it.hasNext();) {
4694	>	if (c.contains(it.next())) {
4695	>	it.remove();
4696	>	modified = true;
4697	>	}
4698	>	}
4699	>	return modified;
4700		}
4701
4702	<	/**
4703	<	* Returns the result of accumulating the given transformation
4704	<	* of all values using the given reducer to combine values,
4705	<	* and the given basis as an identity value.
4706	<	*
4707	<	* @param transformer a function returning the transformation
4708	<	* for an element
4709	<	* @param basis the identity (initial default value) for the reduction
4710	<	* @param reducer a commutative associative combining function
4025	<	* @return the result of accumulating the given transformation
4026	<	* of all values
4027	<	*/
4028	<	public int reduceValuesToInt(ObjectToInt<? super V> transformer,
4029	<	int basis,
4030	<	IntByIntToInt reducer) {
4031	<	return fjp.invoke(ForkJoinTasks.reduceValuesToInt
4032	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
4702	>	public final boolean retainAll(Collection<?> c) {
4703	>	boolean modified = false;
4704	>	for (Iterator<?> it = iterator(); it.hasNext();) {
4705	>	if (!c.contains(it.next())) {
4706	>	it.remove();
4707	>	modified = true;
4708	>	}
4709	>	}
4710	>	return modified;
4711		}
4712
4713	<	/**
4714	<	* Performs the given action for each entry.
4715	<	*
4716	<	* @param action the action
4717	<	*/
4718	<	public void forEachEntry(Action<Map.Entry<K,V>> action) {
4719	<	fjp.invoke(ForkJoinTasks.forEachEntry
4720	<	(ConcurrentHashMapV8.this, action));
4713	>	}
4714	>
4715	>	/**
4716	>	* A view of a ConcurrentHashMapV8 as a {@link Set} of keys, in
4717	>	* which additions may optionally be enabled by mapping to a
4718	>	* common value.  This class cannot be directly instantiated. See
4719	>	* {@link #keySet}, {@link #keySet(Object)}, {@link #newKeySet()},
4720	>	* {@link #newKeySet(int)}.
4721	>	*/
4722	>	public static class KeySetView<K,V> extends CHMView<K,V>
4723	>	implements Set<K>, java.io.Serializable {
4724	>	private static final long serialVersionUID = 7249069246763182397L;
4725	>	private final V value;
4726	>	KeySetView(ConcurrentHashMapV8<K, V> map, V value) {  // non-public
4727	>	super(map);
4728	>	this.value = value;
4729		}
4730
4731		/**
4732	<	* Performs the given action for each non-null transformation
4733	<	* of each entry.
4732	>	* Returns the default mapped value for additions,
4733	>	* or {@code null} if additions are not supported.
4734		*
4735	<	* @param transformer a function returning the transformation
4736	<	* for an element, or null of there is no transformation (in
4051	<	* which case the action is not applied).
4052	<	* @param action the action
4735	>	* @return the default mapped value for additions, or {@code null}
4736	>	* if not supported.
4737		*/
4738	<	public <U> void forEachEntry(Fun<Map.Entry<K,V>, ? extends U> transformer,
4739	<	Action<U> action) {
4740	<	fjp.invoke(ForkJoinTasks.forEachEntry
4741	<	(ConcurrentHashMapV8.this, transformer, action));
4742	<	}
4738	>	public V getMappedValue() { return value; }
4739	>
4740	>	// implement Set API
4741	>
4742	>	public boolean contains(Object o) { return map.containsKey(o); }
4743	>	public boolean remove(Object o)   { return map.remove(o) != null; }
4744
4745		/**
4746	<	* Returns a non-null result from applying the given search
4747	<	* function on each entry, or null if none.  Upon success,
4748	<	* further element processing is suppressed and the results of
4749	<	* any other parallel invocations of the search function are
4750	<	* ignored.
4746	>	* Returns a "weakly consistent" iterator that will never
4747	>	* throw {@link ConcurrentModificationException}, and
4748	>	* guarantees to traverse elements as they existed upon
4749	>	* construction of the iterator, and may (but is not
4750	>	* guaranteed to) reflect any modifications subsequent to
4751	>	* construction.
4752		*
4753	<	* @param searchFunction a function returning a non-null
4068	<	* result on success, else null
4069	<	* @return a non-null result from applying the given search
4070	<	* function on each entry, or null if none
4753	>	* @return an iterator over the keys of this map
4754		*/
4755	<	public <U> U searchEntries(Fun<Map.Entry<K,V>, ? extends U> searchFunction) {
4756	<	return fjp.invoke(ForkJoinTasks.searchEntries
4757	<	(ConcurrentHashMapV8.this, searchFunction));
4755	>	public Iterator<K> iterator()     { return new KeyIterator<K,V>(map); }
4756	>	public boolean add(K e) {
4757	>	V v;
4758	>	if ((v = value) == null)
4759	>	throw new UnsupportedOperationException();
4760	>	if (e == null)
4761	>	throw new NullPointerException();
4762	>	return map.internalPut(e, v, true) == null;
4763	>	}
4764	>	public boolean addAll(Collection<? extends K> c) {
4765	>	boolean added = false;
4766	>	V v;
4767	>	if ((v = value) == null)
4768	>	throw new UnsupportedOperationException();
4769	>	for (K e : c) {
4770	>	if (e == null)
4771	>	throw new NullPointerException();
4772	>	if (map.internalPut(e, v, true) == null)
4773	>	added = true;
4774	>	}
4775	>	return added;
4776	>	}
4777	>	public boolean equals(Object o) {
4778	>	Set<?> c;
4779	>	return ((o instanceof Set) &&
4780	>	((c = (Set<?>)o) == this ||
4781	>	(containsAll(c) && c.containsAll(this))));
4782		}
4783	+	}
4784
4785	<	/**
4786	<	* Returns the result of accumulating all entries using the
4787	<	* given reducer to combine values, or null if none.
4788	<	*
4789	<	* @param reducer a commutative associative combining function
4790	<	* @return the result of accumulating all entries
4791	<	*/
4792	<	public Map.Entry<K,V> reduceEntries(BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
4793	<	return fjp.invoke(ForkJoinTasks.reduceEntries
4794	<	(ConcurrentHashMapV8.this, reducer));
4785	>	/**
4786	>	* A view of a ConcurrentHashMapV8 as a {@link Collection} of
4787	>	* values, in which additions are disabled. This class cannot be
4788	>	* directly instantiated. See {@link #values},
4789	>	*
4790	>	* <p>The view's {@code iterator} is a "weakly consistent" iterator
4791	>	* that will never throw {@link ConcurrentModificationException},
4792	>	* and guarantees to traverse elements as they existed upon
4793	>	* construction of the iterator, and may (but is not guaranteed to)
4794	>	* reflect any modifications subsequent to construction.
4795	>	*/
4796	>	public static final class ValuesView<K,V> extends CHMView<K,V>
4797	>	implements Collection<V> {
4798	>	ValuesView(ConcurrentHashMapV8<K, V> map)   { super(map); }
4799	>	public final boolean contains(Object o) { return map.containsValue(o); }
4800	>	public final boolean remove(Object o) {
4801	>	if (o != null) {
4802	>	Iterator<V> it = new ValueIterator<K,V>(map);
4803	>	while (it.hasNext()) {
4804	>	if (o.equals(it.next())) {
4805	>	it.remove();
4806	>	return true;
4807	>	}
4808	>	}
4809	>	}
4810	>	return false;
4811		}
4812
4813		/**
4814	<	* Returns the result of accumulating the given transformation
4815	<	* of all entries using the given reducer to combine values,
4816	<	* or null if none.
4814	>	* Returns a "weakly consistent" iterator that will never
4815	>	* throw {@link ConcurrentModificationException}, and
4816	>	* guarantees to traverse elements as they existed upon
4817	>	* construction of the iterator, and may (but is not
4818	>	* guaranteed to) reflect any modifications subsequent to
4819	>	* construction.
4820		*
4821	<	* @param transformer a function returning the transformation
4095	<	* for an element, or null of there is no transformation (in
4096	<	* which case it is not combined).
4097	<	* @param reducer a commutative associative combining function
4098	<	* @return the result of accumulating the given transformation
4099	<	* of all entries
4821	>	* @return an iterator over the values of this map
4822		*/
4823	<	public <U> U reduceEntries(Fun<Map.Entry<K,V>, ? extends U> transformer,
4824	<	BiFun<? super U, ? super U, ? extends U> reducer) {
4825	<	return fjp.invoke(ForkJoinTasks.reduceEntries
4826	<	(ConcurrentHashMapV8.this, transformer, reducer));
4823	>	public final Iterator<V> iterator() {
4824	>	return new ValueIterator<K,V>(map);
4825	>	}
4826	>	public final boolean add(V e) {
4827	>	throw new UnsupportedOperationException();
4828	>	}
4829	>	public final boolean addAll(Collection<? extends V> c) {
4830	>	throw new UnsupportedOperationException();
4831		}
4832
4833	<	/**
4834	<	* Returns the result of accumulating the given transformation
4835	<	* of all entries using the given reducer to combine values,
4836	<	* and the given basis as an identity value.
4837	<	*
4838	<	* @param transformer a function returning the transformation
4839	<	* for an element
4840	<	* @param basis the identity (initial default value) for the reduction
4841	<	* @param reducer a commutative associative combining function
4842	<	* @return the result of accumulating the given transformation
4843	<	* of all entries
4844	<	*/
4845	<	public double reduceEntriesToDouble(ObjectToDouble<Map.Entry<K,V>> transformer,
4846	<	double basis,
4847	<	DoubleByDoubleToDouble reducer) {
4848	<	return fjp.invoke(ForkJoinTasks.reduceEntriesToDouble
4849	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
4833	>	}
4834	>
4835	>	/**
4836	>	* A view of a ConcurrentHashMapV8 as a {@link Set} of (key, value)
4837	>	* entries.  This class cannot be directly instantiated. See
4838	>	* {@link #entrySet}.
4839	>	*/
4840	>	public static final class EntrySetView<K,V> extends CHMView<K,V>
4841	>	implements Set<Map.Entry<K,V>> {
4842	>	EntrySetView(ConcurrentHashMapV8<K, V> map) { super(map); }
4843	>	public final boolean contains(Object o) {
4844	>	Object k, v, r; Map.Entry<?,?> e;
4845	>	return ((o instanceof Map.Entry) &&
4846	>	(k = (e = (Map.Entry<?,?>)o).getKey()) != null &&
4847	>	(r = map.get(k)) != null &&
4848	>	(v = e.getValue()) != null &&
4849	>	(v == r || v.equals(r)));
4850	>	}
4851	>	public final boolean remove(Object o) {
4852	>	Object k, v; Map.Entry<?,?> e;
4853	>	return ((o instanceof Map.Entry) &&
4854	>	(k = (e = (Map.Entry<?,?>)o).getKey()) != null &&
4855	>	(v = e.getValue()) != null &&
4856	>	map.remove(k, v));
4857		}
4858
4859		/**
4860	<	* Returns the result of accumulating the given transformation
4861	<	* of all entries using the given reducer to combine values,
4862	<	* and the given basis as an identity value.
4860	>	* Returns a "weakly consistent" iterator that will never
4861	>	* throw {@link ConcurrentModificationException}, and
4862	>	* guarantees to traverse elements as they existed upon
4863	>	* construction of the iterator, and may (but is not
4864	>	* guaranteed to) reflect any modifications subsequent to
4865	>	* construction.
4866		*
4867	<	* @param transformer a function returning the transformation
4132	<	* for an element
4133	<	* @param basis the identity (initial default value) for the reduction
4134	<	* @param reducer a commutative associative combining function
4135	<	* @return  the result of accumulating the given transformation
4136	<	* of all entries
4867	>	* @return an iterator over the entries of this map
4868		*/
4869	<	public long reduceEntriesToLong(ObjectToLong<Map.Entry<K,V>> transformer,
4870	<	long basis,
4140	<	LongByLongToLong reducer) {
4141	<	return fjp.invoke(ForkJoinTasks.reduceEntriesToLong
4142	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
4869	>	public final Iterator<Map.Entry<K,V>> iterator() {
4870	>	return new EntryIterator<K,V>(map);
4871		}
4872
4873	<	/**
4874	<	* Returns the result of accumulating the given transformation
4875	<	* of all entries using the given reducer to combine values,
4876	<	* and the given basis as an identity value.
4877	<	*
4878	<	* @param transformer a function returning the transformation
4879	<	* for an element
4880	<	* @param basis the identity (initial default value) for the reduction
4881	<	* @param reducer a commutative associative combining function
4882	<	* @return the result of accumulating the given transformation
4883	<	* of all entries
4884	<	*/
4885	<	public int reduceEntriesToInt(ObjectToInt<Map.Entry<K,V>> transformer,
4886	<	int basis,
4887	<	IntByIntToInt reducer) {
4888	<	return fjp.invoke(ForkJoinTasks.reduceEntriesToInt
4889	<	(ConcurrentHashMapV8.this, transformer, basis, reducer));
4873	>	public final boolean add(Entry<K,V> e) {
4874	>	K key = e.getKey();
4875	>	V value = e.getValue();
4876	>	if (key == null || value == null)
4877	>	throw new NullPointerException();
4878	>	return map.internalPut(key, value, false) == null;
4879	>	}
4880	>	public final boolean addAll(Collection<? extends Entry<K,V>> c) {
4881	>	boolean added = false;
4882	>	for (Entry<K,V> e : c) {
4883	>	if (add(e))
4884	>	added = true;
4885	>	}
4886	>	return added;
4887	>	}
4888	>	public boolean equals(Object o) {
4889	>	Set<?> c;
4890	>	return ((o instanceof Set) &&
4891	>	((c = (Set<?>)o) == this ||
4892	>	(containsAll(c) && c.containsAll(this))));
4893		}
4894		}
4895
#	Line 4166 | Line 4897 | public class ConcurrentHashMapV8<K, V>
4897
4898		/**
4899		* Predefined tasks for performing bulk parallel operations on
4900	<	* ConcurrentHashMaps. These tasks follow the forms and rules used
4901	<	* in class {@link Parallel}. Each method has the same name, but
4902	<	* returns a task rather than invoking it. These methods may be
4903	<	* useful in custom applications such as submitting a task without
4904	<	* waiting for completion, or combining with other tasks.
4900	>	* ConcurrentHashMapV8s. These tasks follow the forms and rules used
4901	>	* for bulk operations. Each method has the same name, but returns
4902	>	* a task rather than invoking it. These methods may be useful in
4903	>	* custom applications such as submitting a task without waiting
4904	>	* for completion, using a custom pool, or combining with other
4905	>	* tasks.
4906		*/
4907		public static class ForkJoinTasks {
4908		private ForkJoinTasks() {}
#	Line 4196 | Line 4928 | public class ConcurrentHashMapV8<K, V>
4928		*
4929		* @param map the map
4930		* @param transformer a function returning the transformation
4931	<	* for an element, or null of there is no transformation (in
4932	<	* which case the action is not applied).
4931	>	* for an element, or null if there is no transformation (in
4932	>	* which case the action is not applied)
4933		* @param action the action
4934		* @return the task
4935		*/
#	Line 4239 | Line 4971 | public class ConcurrentHashMapV8<K, V>
4971		*
4972		* @param map the map
4973		* @param transformer a function returning the transformation
4974	<	* for an element, or null of there is no transformation (in
4974	>	* for an element, or null if there is no transformation (in
4975		* which case it is not combined).
4976		* @param reducer a commutative associative combining function
4977		* @return the task
#	Line 4346 | Line 5078 | public class ConcurrentHashMapV8<K, V>
5078		*
5079		* @param map the map
5080		* @param transformer a function returning the transformation
5081	<	* for an element, or null of there is no transformation (in
5082	<	* which case the action is not applied).
5081	>	* for an element, or null if there is no transformation (in
5082	>	* which case the action is not applied)
5083		* @param action the action
5084		* @return the task
5085		*/
#	Line 4406 | Line 5138 | public class ConcurrentHashMapV8<K, V>
5138		*
5139		* @param map the map
5140		* @param transformer a function returning the transformation
5141	<	* for an element, or null of there is no transformation (in
5141	>	* for an element, or null if there is no transformation (in
5142		* which case it is not combined).
5143		* @param reducer a commutative associative combining function
5144		* @return the task
#	Line 4513 | Line 5245 | public class ConcurrentHashMapV8<K, V>
5245		*
5246		* @param map the map
5247		* @param transformer a function returning the transformation
5248	<	* for an element, or null of there is no transformation (in
5249	<	* which case the action is not applied).
5248	>	* for an element, or null if there is no transformation (in
5249	>	* which case the action is not applied)
5250		* @param action the action
5251		*/
5252		public static <K,V,U> ForkJoinTask<Void> forEachValue
#	Line 4538 | Line 5270 | public class ConcurrentHashMapV8<K, V>
5270		* @param searchFunction a function returning a non-null
5271		* result on success, else null
5272		* @return the task
4541	–	*
5273		*/
5274		public static <K,V,U> ForkJoinTask<U> searchValues
5275		(ConcurrentHashMapV8<K,V> map,
#	Line 4573 | Line 5304 | public class ConcurrentHashMapV8<K, V>
5304		*
5305		* @param map the map
5306		* @param transformer a function returning the transformation
5307	<	* for an element, or null of there is no transformation (in
5307	>	* for an element, or null if there is no transformation (in
5308		* which case it is not combined).
5309		* @param reducer a commutative associative combining function
5310		* @return the task
#	Line 4680 | Line 5411 | public class ConcurrentHashMapV8<K, V>
5411		*
5412		* @param map the map
5413		* @param transformer a function returning the transformation
5414	<	* for an element, or null of there is no transformation (in
5415	<	* which case the action is not applied).
5414	>	* for an element, or null if there is no transformation (in
5415	>	* which case the action is not applied)
5416		* @param action the action
5417		*/
5418		public static <K,V,U> ForkJoinTask<Void> forEachEntry
#	Line 4705 | Line 5436 | public class ConcurrentHashMapV8<K, V>
5436		* @param searchFunction a function returning a non-null
5437		* result on success, else null
5438		* @return the task
4708	–	*
5439		*/
5440		public static <K,V,U> ForkJoinTask<U> searchEntries
5441		(ConcurrentHashMapV8<K,V> map,
#	Line 4740 | Line 5470 | public class ConcurrentHashMapV8<K, V>
5470		*
5471		* @param map the map
5472		* @param transformer a function returning the transformation
5473	<	* for an element, or null of there is no transformation (in
5473	>	* for an element, or null if there is no transformation (in
5474		* which case it is not combined).
5475		* @param reducer a commutative associative combining function
5476		* @return the task
#	Line 4830 | Line 5560 | public class ConcurrentHashMapV8<K, V>
5560
5561		// -------------------------------------------------------
5562
4833	–	/**
4834	–	* Base for FJ tasks for bulk operations. This adds a variant of
4835	–	* CountedCompleters and some split and merge bookkeeping to
4836	–	* iterator functionality. The forEach and reduce methods are
4837	–	* similar to those illustrated in CountedCompleter documentation,
4838	–	* except that bottom-up reduction completions perform them within
4839	–	* their compute methods. The search methods are like forEach
4840	–	* except they continually poll for success and exit early.  Also,
4841	–	* exceptions are handled in a simpler manner, by just trying to
4842	–	* complete root task exceptionally.
4843	–	*/
4844	–	@SuppressWarnings("serial") static abstract class BulkTask<K,V,R> extends Traverser<K,V,R> {
4845	–	final BulkTask<K,V,?> parent;  // completion target
4846	–	int batch;                     // split control; -1 for unknown
4847	–	int pending;                   // completion control
4848	–
4849	–	BulkTask(ConcurrentHashMapV8<K,V> map, BulkTask<K,V,?> parent,
4850	–	int batch) {
4851	–	super(map);
4852	–	this.parent = parent;
4853	–	this.batch = batch;
4854	–	if (parent != null && map != null) { // split parent
4855	–	Node[] t;
4856	–	if ((t = parent.tab) == null &&
4857	–	(t = parent.tab = map.table) != null)
4858	–	parent.baseLimit = parent.baseSize = t.length;
4859	–	this.tab = t;
4860	–	this.baseSize = parent.baseSize;
4861	–	int hi = this.baseLimit = parent.baseLimit;
4862	–	parent.baseLimit = this.index = this.baseIndex =
4863	–	(hi + parent.baseIndex + 1) >>> 1;
4864	–	}
4865	–	}
4866	–
4867	–	// FJ methods
4868	–
4869	–	/**
4870	–	* Propagates completion. Note that all reduce actions
4871	–	* bypass this method to combine while completing.
4872	–	*/
4873	–	final void tryComplete() {
4874	–	BulkTask<K,V,?> a = this, s = a;
4875	–	for (int c;;) {
4876	–	if ((c = a.pending) == 0) {
4877	–	if ((a = (s = a).parent) == null) {
4878	–	s.quietlyComplete();
4879	–	break;
4880	–	}
4881	–	}
4882	–	else if (U.compareAndSwapInt(a, PENDING, c, c - 1))
4883	–	break;
4884	–	}
4885	–	}
4886	–
4887	–	/**
4888	–	* Forces root task to complete.
4889	–	* @param ex if null, complete normally, else exceptionally
4890	–	* @return false to simplify use
4891	–	*/
4892	–	final boolean tryCompleteComputation(Throwable ex) {
4893	–	for (BulkTask<K,V,?> a = this;;) {
4894	–	BulkTask<K,V,?> p = a.parent;
4895	–	if (p == null) {
4896	–	if (ex != null)
4897	–	a.completeExceptionally(ex);
4898	–	else
4899	–	a.quietlyComplete();
4900	–	return false;
4901	–	}
4902	–	a = p;
4903	–	}
4904	–	}
4905	–
4906	–	/**
4907	–	* Version of tryCompleteComputation for function screening checks
4908	–	*/
4909	–	final boolean abortOnNullFunction() {
4910	–	return tryCompleteComputation(new Error("Unexpected null function"));
4911	–	}
4912	–
4913	–	// utilities
4914	–
4915	–	/** CompareAndSet pending count */
4916	–	final boolean casPending(int cmp, int val) {
4917	–	return U.compareAndSwapInt(this, PENDING, cmp, val);
4918	–	}
4919	–
4920	–	/**
4921	–	* Returns approx exp2 of the number of times (minus one) to
4922	–	* split task by two before executing leaf action. This value
4923	–	* is faster to compute and more convenient to use as a guide
4924	–	* to splitting than is the depth, since it is used while
4925	–	* dividing by two anyway.
4926	–	*/
4927	–	final int batch() {
4928	–	ConcurrentHashMapV8<K, V> m; int b; Node[] t;
4929	–	if ((b = batch) < 0 && (m = map) != null) { // force initialization
4930	–	if ((t = tab) == null && (t = tab = m.table) != null)
4931	–	baseLimit = baseSize = t.length;
4932	–	if (t != null) {
4933	–	long n = m.counter.sum();
4934	–	int sp = getPool().getParallelism() << 3; // slack of 8
4935	–	b = batch = (n <= 0L) ? 0 : (n < (long)sp) ? (int)n : sp;
4936	–	}
4937	–	}
4938	–	return b;
4939	–	}
4940	–
4941	–	/**
4942	–	* Returns exportable snapshot entry.
4943	–	*/
4944	–	static <K,V> AbstractMap.SimpleEntry<K,V> entryFor(K k, V v) {
4945	–	return new AbstractMap.SimpleEntry<K,V>(k, v);
4946	–	}
4947	–
4948	–	// Unsafe mechanics
4949	–	private static final sun.misc.Unsafe U;
4950	–	private static final long PENDING;
4951	–	static {
4952	–	try {
4953	–	U = getUnsafe();
4954	–	PENDING = U.objectFieldOffset
4955	–	(BulkTask.class.getDeclaredField("pending"));
4956	–	} catch (Exception e) {
4957	–	throw new Error(e);
4958	–	}
4959	–	}
4960	–	}
4961	–
5563		/*
5564		* Task classes. Coded in a regular but ugly format/style to
5565		* simplify checks that each variant differs in the right way from
5566	<	* others.
5566	>	* others. The null screenings exist because compilers cannot tell
5567	>	* that we've already null-checked task arguments, so we force
5568	>	* simplest hoisted bypass to help avoid convoluted traps.
5569		*/
5570
5571		@SuppressWarnings("serial") static final class ForEachKeyTask<K,V>
5572	<	extends BulkTask<K,V,Void> {
5572	>	extends Traverser<K,V,Void> {
5573		final Action<K> action;
5574		ForEachKeyTask
5575	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5575	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5576		Action<K> action) {
5577		super(m, p, b);
5578		this.action = action;
5579		}
5580	<	@SuppressWarnings("unchecked") public final boolean exec() {
5581	<	final Action<K> action = this.action;
5582	<	if (action == null)
5583	<	return abortOnNullFunction();
5584	<	try {
4982	<	int b = batch(), c;
4983	<	while (b > 1 && baseIndex != baseLimit) {
4984	<	do {} while (!casPending(c = pending, c+1));
4985	<	new ForEachKeyTask<K,V>(map, this, b >>>= 1, action).fork();
4986	<	}
5580	>	@SuppressWarnings("unchecked") public final void compute() {
5581	>	final Action<K> action;
5582	>	if ((action = this.action) != null) {
5583	>	for (int b; (b = preSplit()) > 0;)
5584	>	new ForEachKeyTask<K,V>(map, this, b, action).fork();
5585		while (advance() != null)
5586		action.apply((K)nextKey);
5587	<	tryComplete();
4990	<	} catch (Throwable ex) {
4991	<	return tryCompleteComputation(ex);
5587	>	propagateCompletion();
5588		}
4993	–	return false;
5589		}
5590		}
5591
5592		@SuppressWarnings("serial") static final class ForEachValueTask<K,V>
5593	<	extends BulkTask<K,V,Void> {
5593	>	extends Traverser<K,V,Void> {
5594		final Action<V> action;
5595		ForEachValueTask
5596	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5596	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5597		Action<V> action) {
5598		super(m, p, b);
5599		this.action = action;
5600		}
5601	<	@SuppressWarnings("unchecked") public final boolean exec() {
5602	<	final Action<V> action = this.action;
5603	<	if (action == null)
5604	<	return abortOnNullFunction();
5605	<	try {
5606	<	int b = batch(), c;
5012	<	while (b > 1 && baseIndex != baseLimit) {
5013	<	do {} while (!casPending(c = pending, c+1));
5014	<	new ForEachValueTask<K,V>(map, this, b >>>= 1, action).fork();
5015	<	}
5016	<	Object v;
5601	>	@SuppressWarnings("unchecked") public final void compute() {
5602	>	final Action<V> action;
5603	>	if ((action = this.action) != null) {
5604	>	for (int b; (b = preSplit()) > 0;)
5605	>	new ForEachValueTask<K,V>(map, this, b, action).fork();
5606	>	V v;
5607		while ((v = advance()) != null)
5608	<	action.apply((V)v);
5609	<	tryComplete();
5020	<	} catch (Throwable ex) {
5021	<	return tryCompleteComputation(ex);
5608	>	action.apply(v);
5609	>	propagateCompletion();
5610		}
5023	–	return false;
5611		}
5612		}
5613
5614		@SuppressWarnings("serial") static final class ForEachEntryTask<K,V>
5615	<	extends BulkTask<K,V,Void> {
5615	>	extends Traverser<K,V,Void> {
5616		final Action<Entry<K,V>> action;
5617		ForEachEntryTask
5618	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5618	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5619		Action<Entry<K,V>> action) {
5620		super(m, p, b);
5621		this.action = action;
5622		}
5623	<	@SuppressWarnings("unchecked") public final boolean exec() {
5624	<	final Action<Entry<K,V>> action = this.action;
5625	<	if (action == null)
5626	<	return abortOnNullFunction();
5627	<	try {
5628	<	int b = batch(), c;
5042	<	while (b > 1 && baseIndex != baseLimit) {
5043	<	do {} while (!casPending(c = pending, c+1));
5044	<	new ForEachEntryTask<K,V>(map, this, b >>>= 1, action).fork();
5045	<	}
5046	<	Object v;
5623	>	@SuppressWarnings("unchecked") public final void compute() {
5624	>	final Action<Entry<K,V>> action;
5625	>	if ((action = this.action) != null) {
5626	>	for (int b; (b = preSplit()) > 0;)
5627	>	new ForEachEntryTask<K,V>(map, this, b, action).fork();
5628	>	V v;
5629		while ((v = advance()) != null)
5630	<	action.apply(entryFor((K)nextKey, (V)v));
5631	<	tryComplete();
5050	<	} catch (Throwable ex) {
5051	<	return tryCompleteComputation(ex);
5630	>	action.apply(entryFor((K)nextKey, v));
5631	>	propagateCompletion();
5632		}
5053	–	return false;
5633		}
5634		}
5635
5636		@SuppressWarnings("serial") static final class ForEachMappingTask<K,V>
5637	<	extends BulkTask<K,V,Void> {
5637	>	extends Traverser<K,V,Void> {
5638		final BiAction<K,V> action;
5639		ForEachMappingTask
5640	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5640	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5641		BiAction<K,V> action) {
5642		super(m, p, b);
5643		this.action = action;
5644		}
5645	<	@SuppressWarnings("unchecked") public final boolean exec() {
5646	<	final BiAction<K,V> action = this.action;
5647	<	if (action == null)
5648	<	return abortOnNullFunction();
5649	<	try {
5650	<	int b = batch(), c;
5072	<	while (b > 1 && baseIndex != baseLimit) {
5073	<	do {} while (!casPending(c = pending, c+1));
5074	<	new ForEachMappingTask<K,V>(map, this, b >>>= 1,
5075	<	action).fork();
5076	<	}
5077	<	Object v;
5645	>	@SuppressWarnings("unchecked") public final void compute() {
5646	>	final BiAction<K,V> action;
5647	>	if ((action = this.action) != null) {
5648	>	for (int b; (b = preSplit()) > 0;)
5649	>	new ForEachMappingTask<K,V>(map, this, b, action).fork();
5650	>	V v;
5651		while ((v = advance()) != null)
5652	<	action.apply((K)nextKey, (V)v);
5653	<	tryComplete();
5081	<	} catch (Throwable ex) {
5082	<	return tryCompleteComputation(ex);
5652	>	action.apply((K)nextKey, v);
5653	>	propagateCompletion();
5654		}
5084	–	return false;
5655		}
5656		}
5657
5658		@SuppressWarnings("serial") static final class ForEachTransformedKeyTask<K,V,U>
5659	<	extends BulkTask<K,V,Void> {
5659	>	extends Traverser<K,V,Void> {
5660		final Fun<? super K, ? extends U> transformer;
5661		final Action<U> action;
5662		ForEachTransformedKeyTask
5663	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5664	<	Fun<? super K, ? extends U> transformer,
5095	<	Action<U> action) {
5663	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5664	>	Fun<? super K, ? extends U> transformer, Action<U> action) {
5665		super(m, p, b);
5666	<	this.transformer = transformer;
5098	<	this.action = action;
5099	<
5666	>	this.transformer = transformer; this.action = action;
5667		}
5668	<	@SuppressWarnings("unchecked") public final boolean exec() {
5669	<	final Fun<? super K, ? extends U> transformer =
5670	<	this.transformer;
5671	<	final Action<U> action = this.action;
5672	<	if (transformer == null || action == null)
5673	<	return abortOnNullFunction();
5107	<	try {
5108	<	int b = batch(), c;
5109	<	while (b > 1 && baseIndex != baseLimit) {
5110	<	do {} while (!casPending(c = pending, c+1));
5668	>	@SuppressWarnings("unchecked") public final void compute() {
5669	>	final Fun<? super K, ? extends U> transformer;
5670	>	final Action<U> action;
5671	>	if ((transformer = this.transformer) != null &&
5672	>	(action = this.action) != null) {
5673	>	for (int b; (b = preSplit()) > 0;)
5674		new ForEachTransformedKeyTask<K,V,U>
5675	<	(map, this, b >>>= 1, transformer, action).fork();
5113	<	}
5675	>	(map, this, b, transformer, action).fork();
5676		U u;
5677		while (advance() != null) {
5678		if ((u = transformer.apply((K)nextKey)) != null)
5679		action.apply(u);
5680		}
5681	<	tryComplete();
5120	<	} catch (Throwable ex) {
5121	<	return tryCompleteComputation(ex);
5681	>	propagateCompletion();
5682		}
5123	–	return false;
5683		}
5684		}
5685
5686		@SuppressWarnings("serial") static final class ForEachTransformedValueTask<K,V,U>
5687	<	extends BulkTask<K,V,Void> {
5687	>	extends Traverser<K,V,Void> {
5688		final Fun<? super V, ? extends U> transformer;
5689		final Action<U> action;
5690		ForEachTransformedValueTask
5691	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5692	<	Fun<? super V, ? extends U> transformer,
5134	<	Action<U> action) {
5691	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5692	>	Fun<? super V, ? extends U> transformer, Action<U> action) {
5693		super(m, p, b);
5694	<	this.transformer = transformer;
5137	<	this.action = action;
5138	<
5694	>	this.transformer = transformer; this.action = action;
5695		}
5696	<	@SuppressWarnings("unchecked") public final boolean exec() {
5697	<	final Fun<? super V, ? extends U> transformer =
5698	<	this.transformer;
5699	<	final Action<U> action = this.action;
5700	<	if (transformer == null || action == null)
5701	<	return abortOnNullFunction();
5146	<	try {
5147	<	int b = batch(), c;
5148	<	while (b > 1 && baseIndex != baseLimit) {
5149	<	do {} while (!casPending(c = pending, c+1));
5696	>	@SuppressWarnings("unchecked") public final void compute() {
5697	>	final Fun<? super V, ? extends U> transformer;
5698	>	final Action<U> action;
5699	>	if ((transformer = this.transformer) != null &&
5700	>	(action = this.action) != null) {
5701	>	for (int b; (b = preSplit()) > 0;)
5702		new ForEachTransformedValueTask<K,V,U>
5703	<	(map, this, b >>>= 1, transformer, action).fork();
5704	<	}
5153	<	Object v; U u;
5703	>	(map, this, b, transformer, action).fork();
5704	>	V v; U u;
5705		while ((v = advance()) != null) {
5706	<	if ((u = transformer.apply((V)v)) != null)
5706	>	if ((u = transformer.apply(v)) != null)
5707		action.apply(u);
5708		}
5709	<	tryComplete();
5159	<	} catch (Throwable ex) {
5160	<	return tryCompleteComputation(ex);
5709	>	propagateCompletion();
5710		}
5162	–	return false;
5711		}
5712		}
5713
5714		@SuppressWarnings("serial") static final class ForEachTransformedEntryTask<K,V,U>
5715	<	extends BulkTask<K,V,Void> {
5715	>	extends Traverser<K,V,Void> {
5716		final Fun<Map.Entry<K,V>, ? extends U> transformer;
5717		final Action<U> action;
5718		ForEachTransformedEntryTask
5719	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5720	<	Fun<Map.Entry<K,V>, ? extends U> transformer,
5173	<	Action<U> action) {
5719	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5720	>	Fun<Map.Entry<K,V>, ? extends U> transformer, Action<U> action) {
5721		super(m, p, b);
5722	<	this.transformer = transformer;
5176	<	this.action = action;
5177	<
5722	>	this.transformer = transformer; this.action = action;
5723		}
5724	<	@SuppressWarnings("unchecked") public final boolean exec() {
5725	<	final Fun<Map.Entry<K,V>, ? extends U> transformer =
5726	<	this.transformer;
5727	<	final Action<U> action = this.action;
5728	<	if (transformer == null || action == null)
5729	<	return abortOnNullFunction();
5185	<	try {
5186	<	int b = batch(), c;
5187	<	while (b > 1 && baseIndex != baseLimit) {
5188	<	do {} while (!casPending(c = pending, c+1));
5724	>	@SuppressWarnings("unchecked") public final void compute() {
5725	>	final Fun<Map.Entry<K,V>, ? extends U> transformer;
5726	>	final Action<U> action;
5727	>	if ((transformer = this.transformer) != null &&
5728	>	(action = this.action) != null) {
5729	>	for (int b; (b = preSplit()) > 0;)
5730		new ForEachTransformedEntryTask<K,V,U>
5731	<	(map, this, b >>>= 1, transformer, action).fork();
5732	<	}
5192	<	Object v; U u;
5731	>	(map, this, b, transformer, action).fork();
5732	>	V v; U u;
5733		while ((v = advance()) != null) {
5734	<	if ((u = transformer.apply(entryFor((K)nextKey, (V)v))) != null)
5734	>	if ((u = transformer.apply(entryFor((K)nextKey,
5735	>	v))) != null)
5736		action.apply(u);
5737		}
5738	<	tryComplete();
5198	<	} catch (Throwable ex) {
5199	<	return tryCompleteComputation(ex);
5738	>	propagateCompletion();
5739		}
5201	–	return false;
5740		}
5741		}
5742
5743		@SuppressWarnings("serial") static final class ForEachTransformedMappingTask<K,V,U>
5744	<	extends BulkTask<K,V,Void> {
5744	>	extends Traverser<K,V,Void> {
5745		final BiFun<? super K, ? super V, ? extends U> transformer;
5746		final Action<U> action;
5747		ForEachTransformedMappingTask
5748	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5748	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5749		BiFun<? super K, ? super V, ? extends U> transformer,
5750		Action<U> action) {
5751		super(m, p, b);
5752	<	this.transformer = transformer;
5215	<	this.action = action;
5216	<
5752	>	this.transformer = transformer; this.action = action;
5753		}
5754	<	@SuppressWarnings("unchecked") public final boolean exec() {
5755	<	final BiFun<? super K, ? super V, ? extends U> transformer =
5756	<	this.transformer;
5757	<	final Action<U> action = this.action;
5758	<	if (transformer == null || action == null)
5759	<	return abortOnNullFunction();
5224	<	try {
5225	<	int b = batch(), c;
5226	<	while (b > 1 && baseIndex != baseLimit) {
5227	<	do {} while (!casPending(c = pending, c+1));
5754	>	@SuppressWarnings("unchecked") public final void compute() {
5755	>	final BiFun<? super K, ? super V, ? extends U> transformer;
5756	>	final Action<U> action;
5757	>	if ((transformer = this.transformer) != null &&
5758	>	(action = this.action) != null) {
5759	>	for (int b; (b = preSplit()) > 0;)
5760		new ForEachTransformedMappingTask<K,V,U>
5761	<	(map, this, b >>>= 1, transformer, action).fork();
5762	<	}
5231	<	Object v; U u;
5761	>	(map, this, b, transformer, action).fork();
5762	>	V v; U u;
5763		while ((v = advance()) != null) {
5764	<	if ((u = transformer.apply((K)nextKey, (V)v)) != null)
5764	>	if ((u = transformer.apply((K)nextKey, v)) != null)
5765		action.apply(u);
5766		}
5767	<	tryComplete();
5237	<	} catch (Throwable ex) {
5238	<	return tryCompleteComputation(ex);
5767	>	propagateCompletion();
5768		}
5240	–	return false;
5769		}
5770		}
5771
5772		@SuppressWarnings("serial") static final class SearchKeysTask<K,V,U>
5773	<	extends BulkTask<K,V,U> {
5773	>	extends Traverser<K,V,U> {
5774		final Fun<? super K, ? extends U> searchFunction;
5775		final AtomicReference<U> result;
5776		SearchKeysTask
5777	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5777	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5778		Fun<? super K, ? extends U> searchFunction,
5779		AtomicReference<U> result) {
5780		super(m, p, b);
5781		this.searchFunction = searchFunction; this.result = result;
5782		}
5783	<	@SuppressWarnings("unchecked") public final boolean exec() {
5784	<	AtomicReference<U> result = this.result;
5785	<	final Fun<? super K, ? extends U> searchFunction =
5786	<	this.searchFunction;
5787	<	if (searchFunction == null || result == null)
5788	<	return abortOnNullFunction();
5789	<	try {
5790	<	int b = batch(), c;
5791	<	while (b > 1 && baseIndex != baseLimit && result.get() == null) {
5792	<	do {} while (!casPending(c = pending, c+1));
5793	<	new SearchKeysTask<K,V,U>(map, this, b >>>= 1,
5794	<	searchFunction, result).fork();
5783	>	public final U getRawResult() { return result.get(); }
5784	>	@SuppressWarnings("unchecked") public final void compute() {
5785	>	final Fun<? super K, ? extends U> searchFunction;
5786	>	final AtomicReference<U> result;
5787	>	if ((searchFunction = this.searchFunction) != null &&
5788	>	(result = this.result) != null) {
5789	>	for (int b;;) {
5790	>	if (result.get() != null)
5791	>	return;
5792	>	if ((b = preSplit()) <= 0)
5793	>	break;
5794	>	new SearchKeysTask<K,V,U>
5795	>	(map, this, b, searchFunction, result).fork();
5796		}
5797	<	U u;
5798	<	while (result.get() == null && advance() != null) {
5797	>	while (result.get() == null) {
5798	>	U u;
5799	>	if (advance() == null) {
5800	>	propagateCompletion();
5801	>	break;
5802	>	}
5803		if ((u = searchFunction.apply((K)nextKey)) != null) {
5804		if (result.compareAndSet(null, u))
5805	<	tryCompleteComputation(null);
5805	>	quietlyCompleteRoot();
5806		break;
5807		}
5808		}
5276	–	tryComplete();
5277	–	} catch (Throwable ex) {
5278	–	return tryCompleteComputation(ex);
5809		}
5280	–	return false;
5810		}
5282	–	public final U getRawResult() { return result.get(); }
5811		}
5812
5813		@SuppressWarnings("serial") static final class SearchValuesTask<K,V,U>
5814	<	extends BulkTask<K,V,U> {
5814	>	extends Traverser<K,V,U> {
5815		final Fun<? super V, ? extends U> searchFunction;
5816		final AtomicReference<U> result;
5817		SearchValuesTask
5818	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5818	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5819		Fun<? super V, ? extends U> searchFunction,
5820		AtomicReference<U> result) {
5821		super(m, p, b);
5822		this.searchFunction = searchFunction; this.result = result;
5823		}
5824	<	@SuppressWarnings("unchecked") public final boolean exec() {
5825	<	AtomicReference<U> result = this.result;
5826	<	final Fun<? super V, ? extends U> searchFunction =
5827	<	this.searchFunction;
5828	<	if (searchFunction == null || result == null)
5829	<	return abortOnNullFunction();
5830	<	try {
5831	<	int b = batch(), c;
5832	<	while (b > 1 && baseIndex != baseLimit && result.get() == null) {
5833	<	do {} while (!casPending(c = pending, c+1));
5834	<	new SearchValuesTask<K,V,U>(map, this, b >>>= 1,
5835	<	searchFunction, result).fork();
5836	<	}
5837	<	Object v; U u;
5838	<	while (result.get() == null && (v = advance()) != null) {
5839	<	if ((u = searchFunction.apply((V)v)) != null) {
5824	>	public final U getRawResult() { return result.get(); }
5825	>	@SuppressWarnings("unchecked") public final void compute() {
5826	>	final Fun<? super V, ? extends U> searchFunction;
5827	>	final AtomicReference<U> result;
5828	>	if ((searchFunction = this.searchFunction) != null &&
5829	>	(result = this.result) != null) {
5830	>	for (int b;;) {
5831	>	if (result.get() != null)
5832	>	return;
5833	>	if ((b = preSplit()) <= 0)
5834	>	break;
5835	>	new SearchValuesTask<K,V,U>
5836	>	(map, this, b, searchFunction, result).fork();
5837	>	}
5838	>	while (result.get() == null) {
5839	>	V v; U u;
5840	>	if ((v = advance()) == null) {
5841	>	propagateCompletion();
5842	>	break;
5843	>	}
5844	>	if ((u = searchFunction.apply(v)) != null) {
5845		if (result.compareAndSet(null, u))
5846	<	tryCompleteComputation(null);
5846	>	quietlyCompleteRoot();
5847		break;
5848		}
5849		}
5317	–	tryComplete();
5318	–	} catch (Throwable ex) {
5319	–	return tryCompleteComputation(ex);
5850		}
5321	–	return false;
5851		}
5323	–	public final U getRawResult() { return result.get(); }
5852		}
5853
5854		@SuppressWarnings("serial") static final class SearchEntriesTask<K,V,U>
5855	<	extends BulkTask<K,V,U> {
5855	>	extends Traverser<K,V,U> {
5856		final Fun<Entry<K,V>, ? extends U> searchFunction;
5857		final AtomicReference<U> result;
5858		SearchEntriesTask
5859	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5859	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5860		Fun<Entry<K,V>, ? extends U> searchFunction,
5861		AtomicReference<U> result) {
5862		super(m, p, b);
5863		this.searchFunction = searchFunction; this.result = result;
5864		}
5865	<	@SuppressWarnings("unchecked") public final boolean exec() {
5866	<	AtomicReference<U> result = this.result;
5867	<	final Fun<Entry<K,V>, ? extends U> searchFunction =
5868	<	this.searchFunction;
5869	<	if (searchFunction == null || result == null)
5870	<	return abortOnNullFunction();
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	<	new SearchEntriesTask<K,V,U>(map, this, b >>>= 1,
5876	<	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);
5865	>	public final U getRawResult() { return result.get(); }
5866	>	@SuppressWarnings("unchecked") public final void compute() {
5867	>	final Fun<Entry<K,V>, ? extends U> searchFunction;
5868	>	final AtomicReference<U> result;
5869	>	if ((searchFunction = this.searchFunction) != null &&
5870	>	(result = this.result) != null) {
5871	>	for (int b;;) {
5872	>	if (result.get() != null)
5873	>	return;
5874	>	if ((b = preSplit()) <= 0)
5875	>	break;
5876	>	new SearchEntriesTask<K,V,U>
5877	>	(map, this, b, searchFunction, result).fork();
5878	>	}
5879	>	while (result.get() == null) {
5880	>	V v; U u;
5881	>	if ((v = advance()) == null) {
5882	>	propagateCompletion();
5883		break;
5884		}
5885	+	if ((u = searchFunction.apply(entryFor((K)nextKey,
5886	+	v))) != null) {
5887	+	if (result.compareAndSet(null, u))
5888	+	quietlyCompleteRoot();
5889	+	return;
5890	+	}
5891		}
5358	–	tryComplete();
5359	–	} catch (Throwable ex) {
5360	–	return tryCompleteComputation(ex);
5892		}
5362	–	return false;
5893		}
5364	–	public final U getRawResult() { return result.get(); }
5894		}
5895
5896		@SuppressWarnings("serial") static final class SearchMappingsTask<K,V,U>
5897	<	extends BulkTask<K,V,U> {
5897	>	extends Traverser<K,V,U> {
5898		final BiFun<? super K, ? super V, ? extends U> searchFunction;
5899		final AtomicReference<U> result;
5900		SearchMappingsTask
5901	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5901	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5902		BiFun<? super K, ? super V, ? extends U> searchFunction,
5903		AtomicReference<U> result) {
5904		super(m, p, b);
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	<	try {
5914	<	int b = batch(), c;
5915	<	while (b > 1 && baseIndex != baseLimit && result.get() == null) {
5916	<	do {} while (!casPending(c = pending, c+1));
5917	<	new SearchMappingsTask<K,V,U>(map, this, b >>>= 1,
5918	<	searchFunction, result).fork();
5919	<	}
5920	<	Object v; U u;
5921	<	while (result.get() == null && (v = advance()) != null) {
5922	<	if ((u = searchFunction.apply((K)nextKey, (V)v)) != null) {
5907	>	public final U getRawResult() { return result.get(); }
5908	>	@SuppressWarnings("unchecked") public final void compute() {
5909	>	final BiFun<? super K, ? super V, ? extends U> searchFunction;
5910	>	final AtomicReference<U> result;
5911	>	if ((searchFunction = this.searchFunction) != null &&
5912	>	(result = this.result) != null) {
5913	>	for (int b;;) {
5914	>	if (result.get() != null)
5915	>	return;
5916	>	if ((b = preSplit()) <= 0)
5917	>	break;
5918	>	new SearchMappingsTask<K,V,U>
5919	>	(map, this, b, searchFunction, result).fork();
5920	>	}
5921	>	while (result.get() == null) {
5922	>	V v; U u;
5923	>	if ((v = advance()) == null) {
5924	>	propagateCompletion();
5925	>	break;
5926	>	}
5927	>	if ((u = searchFunction.apply((K)nextKey, v)) != null) {
5928		if (result.compareAndSet(null, u))
5929	<	tryCompleteComputation(null);
5929	>	quietlyCompleteRoot();
5930		break;
5931		}
5932		}
5399	–	tryComplete();
5400	–	} catch (Throwable ex) {
5401	–	return tryCompleteComputation(ex);
5933		}
5403	–	return false;
5934		}
5405	–	public final U getRawResult() { return result.get(); }
5935		}
5936
5937		@SuppressWarnings("serial") static final class ReduceKeysTask<K,V>
5938	<	extends BulkTask<K,V,K> {
5938	>	extends Traverser<K,V,K> {
5939		final BiFun<? super K, ? super K, ? extends K> reducer;
5940		K result;
5941		ReduceKeysTask<K,V> rights, nextRight;
5942		ReduceKeysTask
5943	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5943	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5944		ReduceKeysTask<K,V> nextRight,
5945		BiFun<? super K, ? super K, ? extends K> reducer) {
5946		super(m, p, b); this.nextRight = nextRight;
5947		this.reducer = reducer;
5948		}
5949	<	@SuppressWarnings("unchecked") public final boolean exec() {
5950	<	final BiFun<? super K, ? super K, ? extends K> reducer =
5951	<	this.reducer;
5952	<	if (reducer == null)
5953	<	return abortOnNullFunction();
5425	<	try {
5426	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
5427	<	do {} while (!casPending(c = pending, c+1));
5949	>	public final K getRawResult() { return result; }
5950	>	@SuppressWarnings("unchecked") public final void compute() {
5951	>	final BiFun<? super K, ? super K, ? extends K> reducer;
5952	>	if ((reducer = this.reducer) != null) {
5953	>	for (int b; (b = preSplit()) > 0;)
5954		(rights = new ReduceKeysTask<K,V>
5955	<	(map, this, b >>>= 1, rights, reducer)).fork();
5430	<	}
5955	>	(map, this, b, rights, reducer)).fork();
5956		K r = null;
5957		while (advance() != null) {
5958		K u = (K)nextKey;
5959		r = (r == null) ? u : reducer.apply(r, u);
5960		}
5961		result = r;
5962	<	for (ReduceKeysTask<K,V> t = this, s;;) {
5963	<	int c; BulkTask<K,V,?> par; K tr, sr;
5964	<	if ((c = t.pending) == 0) {
5965	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
5966	<	if ((sr = s.result) != null)
5967	<	t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr);
5968	<	}
5969	<	if ((par = t.parent) == null ||
5970	<	!(par instanceof ReduceKeysTask)) {
5971	<	t.quietlyComplete();
5972	<	break;
5448	<	}
5449	<	t = (ReduceKeysTask<K,V>)par;
5962	>	CountedCompleter<?> c;
5963	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
5964	>	ReduceKeysTask<K,V>
5965	>	t = (ReduceKeysTask<K,V>)c,
5966	>	s = t.rights;
5967	>	while (s != null) {
5968	>	K tr, sr;
5969	>	if ((sr = s.result) != null)
5970	>	t.result = (((tr = t.result) == null) ? sr :
5971	>	reducer.apply(tr, sr));
5972	>	s = t.rights = s.nextRight;
5973		}
5451	–	else if (t.casPending(c, c - 1))
5452	–	break;
5974		}
5454	–	} catch (Throwable ex) {
5455	–	return tryCompleteComputation(ex);
5975		}
5457	–	return false;
5976		}
5459	–	public final K getRawResult() { return result; }
5977		}
5978
5979		@SuppressWarnings("serial") static final class ReduceValuesTask<K,V>
5980	<	extends BulkTask<K,V,V> {
5980	>	extends Traverser<K,V,V> {
5981		final BiFun<? super V, ? super V, ? extends V> reducer;
5982		V result;
5983		ReduceValuesTask<K,V> rights, nextRight;
5984		ReduceValuesTask
5985	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
5985	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
5986		ReduceValuesTask<K,V> nextRight,
5987		BiFun<? super V, ? super V, ? extends V> reducer) {
5988		super(m, p, b); this.nextRight = nextRight;
5989		this.reducer = reducer;
5990		}
5991	<	@SuppressWarnings("unchecked") public final boolean exec() {
5992	<	final BiFun<? super V, ? super V, ? extends V> reducer =
5993	<	this.reducer;
5994	<	if (reducer == null)
5995	<	return abortOnNullFunction();
5479	<	try {
5480	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
5481	<	do {} while (!casPending(c = pending, c+1));
5991	>	public final V getRawResult() { return result; }
5992	>	@SuppressWarnings("unchecked") public final void compute() {
5993	>	final BiFun<? super V, ? super V, ? extends V> reducer;
5994	>	if ((reducer = this.reducer) != null) {
5995	>	for (int b; (b = preSplit()) > 0;)
5996		(rights = new ReduceValuesTask<K,V>
5997	<	(map, this, b >>>= 1, rights, reducer)).fork();
5484	<	}
5997	>	(map, this, b, rights, reducer)).fork();
5998		V r = null;
5999	<	Object v;
5999	>	V v;
6000		while ((v = advance()) != null) {
6001	<	V u = (V)v;
6001	>	V u = v;
6002		r = (r == null) ? u : reducer.apply(r, u);
6003		}
6004		result = r;
6005	<	for (ReduceValuesTask<K,V> t = this, s;;) {
6006	<	int c; BulkTask<K,V,?> par; V tr, sr;
6007	<	if ((c = t.pending) == 0) {
6008	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6009	<	if ((sr = s.result) != null)
6010	<	t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr);
6011	<	}
6012	<	if ((par = t.parent) == null ||
6013	<	!(par instanceof ReduceValuesTask)) {
6014	<	t.quietlyComplete();
6015	<	break;
5503	<	}
5504	<	t = (ReduceValuesTask<K,V>)par;
6005	>	CountedCompleter<?> c;
6006	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6007	>	ReduceValuesTask<K,V>
6008	>	t = (ReduceValuesTask<K,V>)c,
6009	>	s = t.rights;
6010	>	while (s != null) {
6011	>	V tr, sr;
6012	>	if ((sr = s.result) != null)
6013	>	t.result = (((tr = t.result) == null) ? sr :
6014	>	reducer.apply(tr, sr));
6015	>	s = t.rights = s.nextRight;
6016		}
5506	–	else if (t.casPending(c, c - 1))
5507	–	break;
6017		}
5509	–	} catch (Throwable ex) {
5510	–	return tryCompleteComputation(ex);
6018		}
5512	–	return false;
6019		}
5514	–	public final V getRawResult() { return result; }
6020		}
6021
6022		@SuppressWarnings("serial") static final class ReduceEntriesTask<K,V>
6023	<	extends BulkTask<K,V,Map.Entry<K,V>> {
6023	>	extends Traverser<K,V,Map.Entry<K,V>> {
6024		final BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer;
6025		Map.Entry<K,V> result;
6026		ReduceEntriesTask<K,V> rights, nextRight;
6027		ReduceEntriesTask
6028	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6028	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6029		ReduceEntriesTask<K,V> nextRight,
6030		BiFun<Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
6031		super(m, p, b); this.nextRight = nextRight;
6032		this.reducer = reducer;
6033		}
6034	<	@SuppressWarnings("unchecked") public final boolean exec() {
6035	<	final BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer =
6036	<	this.reducer;
6037	<	if (reducer == null)
6038	<	return abortOnNullFunction();
5534	<	try {
5535	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
5536	<	do {} while (!casPending(c = pending, c+1));
6034	>	public final Map.Entry<K,V> getRawResult() { return result; }
6035	>	@SuppressWarnings("unchecked") public final void compute() {
6036	>	final BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer;
6037	>	if ((reducer = this.reducer) != null) {
6038	>	for (int b; (b = preSplit()) > 0;)
6039		(rights = new ReduceEntriesTask<K,V>
6040	<	(map, this, b >>>= 1, rights, reducer)).fork();
5539	<	}
6040	>	(map, this, b, rights, reducer)).fork();
6041		Map.Entry<K,V> r = null;
6042	<	Object v;
6042	>	V v;
6043		while ((v = advance()) != null) {
6044	<	Map.Entry<K,V> u = entryFor((K)nextKey, (V)v);
6044	>	Map.Entry<K,V> u = entryFor((K)nextKey, v);
6045		r = (r == null) ? u : reducer.apply(r, u);
6046		}
6047		result = r;
6048	<	for (ReduceEntriesTask<K,V> t = this, s;;) {
6049	<	int c; BulkTask<K,V,?> par; Map.Entry<K,V> tr, sr;
6050	<	if ((c = t.pending) == 0) {
6051	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6052	<	if ((sr = s.result) != null)
6053	<	t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr);
6054	<	}
6055	<	if ((par = t.parent) == null ||
6056	<	!(par instanceof ReduceEntriesTask)) {
6057	<	t.quietlyComplete();
6058	<	break;
5558	<	}
5559	<	t = (ReduceEntriesTask<K,V>)par;
6048	>	CountedCompleter<?> c;
6049	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6050	>	ReduceEntriesTask<K,V>
6051	>	t = (ReduceEntriesTask<K,V>)c,
6052	>	s = t.rights;
6053	>	while (s != null) {
6054	>	Map.Entry<K,V> tr, sr;
6055	>	if ((sr = s.result) != null)
6056	>	t.result = (((tr = t.result) == null) ? sr :
6057	>	reducer.apply(tr, sr));
6058	>	s = t.rights = s.nextRight;
6059		}
5561	–	else if (t.casPending(c, c - 1))
5562	–	break;
6060		}
5564	–	} catch (Throwable ex) {
5565	–	return tryCompleteComputation(ex);
6061		}
5567	–	return false;
6062		}
5569	–	public final Map.Entry<K,V> getRawResult() { return result; }
6063		}
6064
6065		@SuppressWarnings("serial") static final class MapReduceKeysTask<K,V,U>
6066	<	extends BulkTask<K,V,U> {
6066	>	extends Traverser<K,V,U> {
6067		final Fun<? super K, ? extends U> transformer;
6068		final BiFun<? super U, ? super U, ? extends U> reducer;
6069		U result;
6070		MapReduceKeysTask<K,V,U> rights, nextRight;
6071		MapReduceKeysTask
6072	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6072	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6073		MapReduceKeysTask<K,V,U> nextRight,
6074		Fun<? super K, ? extends U> transformer,
6075		BiFun<? super U, ? super U, ? extends U> reducer) {
#	Line 5584 | Line 6077 | public class ConcurrentHashMapV8<K, V>
6077		this.transformer = transformer;
6078		this.reducer = reducer;
6079		}
6080	<	@SuppressWarnings("unchecked") public final boolean exec() {
6081	<	final Fun<? super K, ? extends U> transformer =
6082	<	this.transformer;
6083	<	final BiFun<? super U, ? super U, ? extends U> reducer =
6084	<	this.reducer;
6085	<	if (transformer == null || reducer == null)
6086	<	return abortOnNullFunction();
5594	<	try {
5595	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
5596	<	do {} while (!casPending(c = pending, c+1));
6080	>	public final U getRawResult() { return result; }
6081	>	@SuppressWarnings("unchecked") public final void compute() {
6082	>	final Fun<? super K, ? extends U> transformer;
6083	>	final BiFun<? super U, ? super U, ? extends U> reducer;
6084	>	if ((transformer = this.transformer) != null &&
6085	>	(reducer = this.reducer) != null) {
6086	>	for (int b; (b = preSplit()) > 0;)
6087		(rights = new MapReduceKeysTask<K,V,U>
6088	<	(map, this, b >>>= 1, rights, transformer, reducer)).fork();
5599	<	}
6088	>	(map, this, b, rights, transformer, reducer)).fork();
6089		U r = null, u;
6090		while (advance() != null) {
6091		if ((u = transformer.apply((K)nextKey)) != null)
6092		r = (r == null) ? u : reducer.apply(r, u);
6093		}
6094		result = r;
6095	<	for (MapReduceKeysTask<K,V,U> t = this, s;;) {
6096	<	int c; BulkTask<K,V,?> par; U tr, sr;
6097	<	if ((c = t.pending) == 0) {
6098	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6099	<	if ((sr = s.result) != null)
6100	<	t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr);
6101	<	}
6102	<	if ((par = t.parent) == null ||
6103	<	!(par instanceof MapReduceKeysTask)) {
6104	<	t.quietlyComplete();
6105	<	break;
5617	<	}
5618	<	t = (MapReduceKeysTask<K,V,U>)par;
6095	>	CountedCompleter<?> c;
6096	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6097	>	MapReduceKeysTask<K,V,U>
6098	>	t = (MapReduceKeysTask<K,V,U>)c,
6099	>	s = t.rights;
6100	>	while (s != null) {
6101	>	U tr, sr;
6102	>	if ((sr = s.result) != null)
6103	>	t.result = (((tr = t.result) == null) ? sr :
6104	>	reducer.apply(tr, sr));
6105	>	s = t.rights = s.nextRight;
6106		}
5620	–	else if (t.casPending(c, c - 1))
5621	–	break;
6107		}
5623	–	} catch (Throwable ex) {
5624	–	return tryCompleteComputation(ex);
6108		}
5626	–	return false;
6109		}
5628	–	public final U getRawResult() { return result; }
6110		}
6111
6112		@SuppressWarnings("serial") static final class MapReduceValuesTask<K,V,U>
6113	<	extends BulkTask<K,V,U> {
6113	>	extends Traverser<K,V,U> {
6114		final Fun<? super V, ? extends U> transformer;
6115		final BiFun<? super U, ? super U, ? extends U> reducer;
6116		U result;
6117		MapReduceValuesTask<K,V,U> rights, nextRight;
6118		MapReduceValuesTask
6119	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6119	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6120		MapReduceValuesTask<K,V,U> nextRight,
6121		Fun<? super V, ? extends U> transformer,
6122		BiFun<? super U, ? super U, ? extends U> reducer) {
#	Line 5643 | Line 6124 | public class ConcurrentHashMapV8<K, V>
6124		this.transformer = transformer;
6125		this.reducer = reducer;
6126		}
6127	<	@SuppressWarnings("unchecked") public final boolean exec() {
6128	<	final Fun<? super V, ? extends U> transformer =
6129	<	this.transformer;
6130	<	final BiFun<? super U, ? super U, ? extends U> reducer =
6131	<	this.reducer;
6132	<	if (transformer == null || reducer == null)
6133	<	return abortOnNullFunction();
5653	<	try {
5654	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
5655	<	do {} while (!casPending(c = pending, c+1));
6127	>	public final U getRawResult() { return result; }
6128	>	@SuppressWarnings("unchecked") public final void compute() {
6129	>	final Fun<? super V, ? extends U> transformer;
6130	>	final BiFun<? super U, ? super U, ? extends U> reducer;
6131	>	if ((transformer = this.transformer) != null &&
6132	>	(reducer = this.reducer) != null) {
6133	>	for (int b; (b = preSplit()) > 0;)
6134		(rights = new MapReduceValuesTask<K,V,U>
6135	<	(map, this, b >>>= 1, rights, transformer, reducer)).fork();
5658	<	}
6135	>	(map, this, b, rights, transformer, reducer)).fork();
6136		U r = null, u;
6137	<	Object v;
6137	>	V v;
6138		while ((v = advance()) != null) {
6139	<	if ((u = transformer.apply((V)v)) != null)
6139	>	if ((u = transformer.apply(v)) != null)
6140		r = (r == null) ? u : reducer.apply(r, u);
6141		}
6142		result = r;
6143	<	for (MapReduceValuesTask<K,V,U> t = this, s;;) {
6144	<	int c; BulkTask<K,V,?> par; U tr, sr;
6145	<	if ((c = t.pending) == 0) {
6146	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6147	<	if ((sr = s.result) != null)
6148	<	t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr);
6149	<	}
6150	<	if ((par = t.parent) == null ||
6151	<	!(par instanceof MapReduceValuesTask)) {
6152	<	t.quietlyComplete();
6153	<	break;
5677	<	}
5678	<	t = (MapReduceValuesTask<K,V,U>)par;
6143	>	CountedCompleter<?> c;
6144	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6145	>	MapReduceValuesTask<K,V,U>
6146	>	t = (MapReduceValuesTask<K,V,U>)c,
6147	>	s = t.rights;
6148	>	while (s != null) {
6149	>	U tr, sr;
6150	>	if ((sr = s.result) != null)
6151	>	t.result = (((tr = t.result) == null) ? sr :
6152	>	reducer.apply(tr, sr));
6153	>	s = t.rights = s.nextRight;
6154		}
5680	–	else if (t.casPending(c, c - 1))
5681	–	break;
6155		}
5683	–	} catch (Throwable ex) {
5684	–	return tryCompleteComputation(ex);
6156		}
5686	–	return false;
6157		}
5688	–	public final U getRawResult() { return result; }
6158		}
6159
6160		@SuppressWarnings("serial") static final class MapReduceEntriesTask<K,V,U>
6161	<	extends BulkTask<K,V,U> {
6161	>	extends Traverser<K,V,U> {
6162		final Fun<Map.Entry<K,V>, ? extends U> transformer;
6163		final BiFun<? super U, ? super U, ? extends U> reducer;
6164		U result;
6165		MapReduceEntriesTask<K,V,U> rights, nextRight;
6166		MapReduceEntriesTask
6167	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6167	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6168		MapReduceEntriesTask<K,V,U> nextRight,
6169		Fun<Map.Entry<K,V>, ? extends U> transformer,
6170		BiFun<? super U, ? super U, ? extends U> reducer) {
#	Line 5703 | Line 6172 | public class ConcurrentHashMapV8<K, V>
6172		this.transformer = transformer;
6173		this.reducer = reducer;
6174		}
6175	<	@SuppressWarnings("unchecked") public final boolean exec() {
6176	<	final Fun<Map.Entry<K,V>, ? extends U> transformer =
6177	<	this.transformer;
6178	<	final BiFun<? super U, ? super U, ? extends U> reducer =
6179	<	this.reducer;
6180	<	if (transformer == null || reducer == null)
6181	<	return abortOnNullFunction();
5713	<	try {
5714	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
5715	<	do {} while (!casPending(c = pending, c+1));
6175	>	public final U getRawResult() { return result; }
6176	>	@SuppressWarnings("unchecked") public final void compute() {
6177	>	final Fun<Map.Entry<K,V>, ? extends U> transformer;
6178	>	final BiFun<? super U, ? super U, ? extends U> reducer;
6179	>	if ((transformer = this.transformer) != null &&
6180	>	(reducer = this.reducer) != null) {
6181	>	for (int b; (b = preSplit()) > 0;)
6182		(rights = new MapReduceEntriesTask<K,V,U>
6183	<	(map, this, b >>>= 1, rights, transformer, reducer)).fork();
5718	<	}
6183	>	(map, this, b, rights, transformer, reducer)).fork();
6184		U r = null, u;
6185	<	Object v;
6185	>	V v;
6186		while ((v = advance()) != null) {
6187	<	if ((u = transformer.apply(entryFor((K)nextKey, (V)v))) != null)
6187	>	if ((u = transformer.apply(entryFor((K)nextKey,
6188	>	v))) != null)
6189		r = (r == null) ? u : reducer.apply(r, u);
6190		}
6191		result = r;
6192	<	for (MapReduceEntriesTask<K,V,U> t = this, s;;) {
6193	<	int c; BulkTask<K,V,?> par; U tr, sr;
6194	<	if ((c = t.pending) == 0) {
6195	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6196	<	if ((sr = s.result) != null)
6197	<	t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr);
6198	<	}
6199	<	if ((par = t.parent) == null ||
6200	<	!(par instanceof MapReduceEntriesTask)) {
6201	<	t.quietlyComplete();
6202	<	break;
5737	<	}
5738	<	t = (MapReduceEntriesTask<K,V,U>)par;
6192	>	CountedCompleter<?> c;
6193	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6194	>	MapReduceEntriesTask<K,V,U>
6195	>	t = (MapReduceEntriesTask<K,V,U>)c,
6196	>	s = t.rights;
6197	>	while (s != null) {
6198	>	U tr, sr;
6199	>	if ((sr = s.result) != null)
6200	>	t.result = (((tr = t.result) == null) ? sr :
6201	>	reducer.apply(tr, sr));
6202	>	s = t.rights = s.nextRight;
6203		}
5740	–	else if (t.casPending(c, c - 1))
5741	–	break;
6204		}
5743	–	} catch (Throwable ex) {
5744	–	return tryCompleteComputation(ex);
6205		}
5746	–	return false;
6206		}
5748	–	public final U getRawResult() { return result; }
6207		}
6208
6209		@SuppressWarnings("serial") static final class MapReduceMappingsTask<K,V,U>
6210	<	extends BulkTask<K,V,U> {
6210	>	extends Traverser<K,V,U> {
6211		final BiFun<? super K, ? super V, ? extends U> transformer;
6212		final BiFun<? super U, ? super U, ? extends U> reducer;
6213		U result;
6214		MapReduceMappingsTask<K,V,U> rights, nextRight;
6215		MapReduceMappingsTask
6216	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6216	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6217		MapReduceMappingsTask<K,V,U> nextRight,
6218		BiFun<? super K, ? super V, ? extends U> transformer,
6219		BiFun<? super U, ? super U, ? extends U> reducer) {
#	Line 5763 | Line 6221 | public class ConcurrentHashMapV8<K, V>
6221		this.transformer = transformer;
6222		this.reducer = reducer;
6223		}
6224	<	@SuppressWarnings("unchecked") public final boolean exec() {
6225	<	final BiFun<? super K, ? super V, ? extends U> transformer =
6226	<	this.transformer;
6227	<	final BiFun<? super U, ? super U, ? extends U> reducer =
6228	<	this.reducer;
6229	<	if (transformer == null || reducer == null)
6230	<	return abortOnNullFunction();
5773	<	try {
5774	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
5775	<	do {} while (!casPending(c = pending, c+1));
6224	>	public final U getRawResult() { return result; }
6225	>	@SuppressWarnings("unchecked") public final void compute() {
6226	>	final BiFun<? super K, ? super V, ? extends U> transformer;
6227	>	final BiFun<? super U, ? super U, ? extends U> reducer;
6228	>	if ((transformer = this.transformer) != null &&
6229	>	(reducer = this.reducer) != null) {
6230	>	for (int b; (b = preSplit()) > 0;)
6231		(rights = new MapReduceMappingsTask<K,V,U>
6232	<	(map, this, b >>>= 1, rights, transformer, reducer)).fork();
5778	<	}
6232	>	(map, this, b, rights, transformer, reducer)).fork();
6233		U r = null, u;
6234	<	Object v;
6234	>	V v;
6235		while ((v = advance()) != null) {
6236	<	if ((u = transformer.apply((K)nextKey, (V)v)) != null)
6236	>	if ((u = transformer.apply((K)nextKey, v)) != null)
6237		r = (r == null) ? u : reducer.apply(r, u);
6238		}
6239		result = r;
6240	<	for (MapReduceMappingsTask<K,V,U> t = this, s;;) {
6241	<	int c; BulkTask<K,V,?> par; U tr, sr;
6242	<	if ((c = t.pending) == 0) {
6243	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6244	<	if ((sr = s.result) != null)
6245	<	t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr);
6246	<	}
6247	<	if ((par = t.parent) == null ||
6248	<	!(par instanceof MapReduceMappingsTask)) {
6249	<	t.quietlyComplete();
6250	<	break;
5797	<	}
5798	<	t = (MapReduceMappingsTask<K,V,U>)par;
6240	>	CountedCompleter<?> c;
6241	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6242	>	MapReduceMappingsTask<K,V,U>
6243	>	t = (MapReduceMappingsTask<K,V,U>)c,
6244	>	s = t.rights;
6245	>	while (s != null) {
6246	>	U tr, sr;
6247	>	if ((sr = s.result) != null)
6248	>	t.result = (((tr = t.result) == null) ? sr :
6249	>	reducer.apply(tr, sr));
6250	>	s = t.rights = s.nextRight;
6251		}
5800	–	else if (t.casPending(c, c - 1))
5801	–	break;
6252		}
5803	–	} catch (Throwable ex) {
5804	–	return tryCompleteComputation(ex);
6253		}
5806	–	return false;
6254		}
5808	–	public final U getRawResult() { return result; }
6255		}
6256
6257		@SuppressWarnings("serial") static final class MapReduceKeysToDoubleTask<K,V>
6258	<	extends BulkTask<K,V,Double> {
6258	>	extends Traverser<K,V,Double> {
6259		final ObjectToDouble<? super K> transformer;
6260		final DoubleByDoubleToDouble reducer;
6261		final double basis;
6262		double result;
6263		MapReduceKeysToDoubleTask<K,V> rights, nextRight;
6264		MapReduceKeysToDoubleTask
6265	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6265	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6266		MapReduceKeysToDoubleTask<K,V> nextRight,
6267		ObjectToDouble<? super K> transformer,
6268		double basis,
#	Line 5825 | Line 6271 | public class ConcurrentHashMapV8<K, V>
6271		this.transformer = transformer;
6272		this.basis = basis; this.reducer = reducer;
6273		}
6274	<	@SuppressWarnings("unchecked") public final boolean exec() {
6275	<	final ObjectToDouble<? super K> transformer =
6276	<	this.transformer;
6277	<	final DoubleByDoubleToDouble reducer = this.reducer;
6278	<	if (transformer == null || reducer == null)
6279	<	return abortOnNullFunction();
6280	<	try {
6281	<	final double id = this.basis;
5836	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
5837	<	do {} while (!casPending(c = pending, c+1));
6274	>	public final Double getRawResult() { return result; }
6275	>	@SuppressWarnings("unchecked") public final void compute() {
6276	>	final ObjectToDouble<? super K> transformer;
6277	>	final DoubleByDoubleToDouble reducer;
6278	>	if ((transformer = this.transformer) != null &&
6279	>	(reducer = this.reducer) != null) {
6280	>	double r = this.basis;
6281	>	for (int b; (b = preSplit()) > 0;)
6282		(rights = new MapReduceKeysToDoubleTask<K,V>
6283	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
5840	<	}
5841	<	double r = id;
6283	>	(map, this, b, rights, transformer, r, reducer)).fork();
6284		while (advance() != null)
6285		r = reducer.apply(r, transformer.apply((K)nextKey));
6286		result = r;
6287	<	for (MapReduceKeysToDoubleTask<K,V> t = this, s;;) {
6288	<	int c; BulkTask<K,V,?> par;
6289	<	if ((c = t.pending) == 0) {
6290	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6291	<	t.result = reducer.apply(t.result, s.result);
6292	<	}
6293	<	if ((par = t.parent) == null ||
6294	<	!(par instanceof MapReduceKeysToDoubleTask)) {
5853	<	t.quietlyComplete();
5854	<	break;
5855	<	}
5856	<	t = (MapReduceKeysToDoubleTask<K,V>)par;
6287	>	CountedCompleter<?> c;
6288	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6289	>	MapReduceKeysToDoubleTask<K,V>
6290	>	t = (MapReduceKeysToDoubleTask<K,V>)c,
6291	>	s = t.rights;
6292	>	while (s != null) {
6293	>	t.result = reducer.apply(t.result, s.result);
6294	>	s = t.rights = s.nextRight;
6295		}
5858	–	else if (t.casPending(c, c - 1))
5859	–	break;
6296		}
5861	–	} catch (Throwable ex) {
5862	–	return tryCompleteComputation(ex);
6297		}
5864	–	return false;
6298		}
5866	–	public final Double getRawResult() { return result; }
6299		}
6300
6301		@SuppressWarnings("serial") static final class MapReduceValuesToDoubleTask<K,V>
6302	<	extends BulkTask<K,V,Double> {
6302	>	extends Traverser<K,V,Double> {
6303		final ObjectToDouble<? super V> transformer;
6304		final DoubleByDoubleToDouble reducer;
6305		final double basis;
6306		double result;
6307		MapReduceValuesToDoubleTask<K,V> rights, nextRight;
6308		MapReduceValuesToDoubleTask
6309	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6309	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6310		MapReduceValuesToDoubleTask<K,V> nextRight,
6311		ObjectToDouble<? super V> transformer,
6312		double basis,
#	Line 5883 | Line 6315 | public class ConcurrentHashMapV8<K, V>
6315		this.transformer = transformer;
6316		this.basis = basis; this.reducer = reducer;
6317		}
6318	<	@SuppressWarnings("unchecked") public final boolean exec() {
6319	<	final ObjectToDouble<? super V> transformer =
6320	<	this.transformer;
6321	<	final DoubleByDoubleToDouble reducer = this.reducer;
6322	<	if (transformer == null || reducer == null)
6323	<	return abortOnNullFunction();
6324	<	try {
6325	<	final double id = this.basis;
5894	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
5895	<	do {} while (!casPending(c = pending, c+1));
6318	>	public final Double getRawResult() { return result; }
6319	>	@SuppressWarnings("unchecked") public final void compute() {
6320	>	final ObjectToDouble<? super V> transformer;
6321	>	final DoubleByDoubleToDouble reducer;
6322	>	if ((transformer = this.transformer) != null &&
6323	>	(reducer = this.reducer) != null) {
6324	>	double r = this.basis;
6325	>	for (int b; (b = preSplit()) > 0;)
6326		(rights = new MapReduceValuesToDoubleTask<K,V>
6327	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6328	<	}
5899	<	double r = id;
5900	<	Object v;
6327	>	(map, this, b, rights, transformer, r, reducer)).fork();
6328	>	V v;
6329		while ((v = advance()) != null)
6330	<	r = reducer.apply(r, transformer.apply((V)v));
6330	>	r = reducer.apply(r, transformer.apply(v));
6331		result = r;
6332	<	for (MapReduceValuesToDoubleTask<K,V> t = this, s;;) {
6333	<	int c; BulkTask<K,V,?> par;
6334	<	if ((c = t.pending) == 0) {
6335	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6336	<	t.result = reducer.apply(t.result, s.result);
6337	<	}
6338	<	if ((par = t.parent) == null ||
6339	<	!(par instanceof MapReduceValuesToDoubleTask)) {
5912	<	t.quietlyComplete();
5913	<	break;
5914	<	}
5915	<	t = (MapReduceValuesToDoubleTask<K,V>)par;
6332	>	CountedCompleter<?> c;
6333	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6334	>	MapReduceValuesToDoubleTask<K,V>
6335	>	t = (MapReduceValuesToDoubleTask<K,V>)c,
6336	>	s = t.rights;
6337	>	while (s != null) {
6338	>	t.result = reducer.apply(t.result, s.result);
6339	>	s = t.rights = s.nextRight;
6340		}
5917	–	else if (t.casPending(c, c - 1))
5918	–	break;
6341		}
5920	–	} catch (Throwable ex) {
5921	–	return tryCompleteComputation(ex);
6342		}
5923	–	return false;
6343		}
5925	–	public final Double getRawResult() { return result; }
6344		}
6345
6346		@SuppressWarnings("serial") static final class MapReduceEntriesToDoubleTask<K,V>
6347	<	extends BulkTask<K,V,Double> {
6347	>	extends Traverser<K,V,Double> {
6348		final ObjectToDouble<Map.Entry<K,V>> transformer;
6349		final DoubleByDoubleToDouble reducer;
6350		final double basis;
6351		double result;
6352		MapReduceEntriesToDoubleTask<K,V> rights, nextRight;
6353		MapReduceEntriesToDoubleTask
6354	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6354	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6355		MapReduceEntriesToDoubleTask<K,V> nextRight,
6356		ObjectToDouble<Map.Entry<K,V>> transformer,
6357		double basis,
#	Line 5942 | Line 6360 | public class ConcurrentHashMapV8<K, V>
6360		this.transformer = transformer;
6361		this.basis = basis; this.reducer = reducer;
6362		}
6363	<	@SuppressWarnings("unchecked") public final boolean exec() {
6364	<	final ObjectToDouble<Map.Entry<K,V>> transformer =
6365	<	this.transformer;
6366	<	final DoubleByDoubleToDouble reducer = this.reducer;
6367	<	if (transformer == null || reducer == null)
6368	<	return abortOnNullFunction();
6369	<	try {
6370	<	final double id = this.basis;
5953	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
5954	<	do {} while (!casPending(c = pending, c+1));
6363	>	public final Double getRawResult() { return result; }
6364	>	@SuppressWarnings("unchecked") public final void compute() {
6365	>	final ObjectToDouble<Map.Entry<K,V>> transformer;
6366	>	final DoubleByDoubleToDouble reducer;
6367	>	if ((transformer = this.transformer) != null &&
6368	>	(reducer = this.reducer) != null) {
6369	>	double r = this.basis;
6370	>	for (int b; (b = preSplit()) > 0;)
6371		(rights = new MapReduceEntriesToDoubleTask<K,V>
6372	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6373	<	}
5958	<	double r = id;
5959	<	Object v;
6372	>	(map, this, b, rights, transformer, r, reducer)).fork();
6373	>	V v;
6374		while ((v = advance()) != null)
6375	<	r = reducer.apply(r, transformer.apply(entryFor((K)nextKey, (V)v)));
6375	>	r = reducer.apply(r, transformer.apply(entryFor((K)nextKey,
6376	>	v)));
6377		result = r;
6378	<	for (MapReduceEntriesToDoubleTask<K,V> t = this, s;;) {
6379	<	int c; BulkTask<K,V,?> par;
6380	<	if ((c = t.pending) == 0) {
6381	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6382	<	t.result = reducer.apply(t.result, s.result);
6383	<	}
6384	<	if ((par = t.parent) == null ||
6385	<	!(par instanceof MapReduceEntriesToDoubleTask)) {
5971	<	t.quietlyComplete();
5972	<	break;
5973	<	}
5974	<	t = (MapReduceEntriesToDoubleTask<K,V>)par;
6378	>	CountedCompleter<?> c;
6379	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6380	>	MapReduceEntriesToDoubleTask<K,V>
6381	>	t = (MapReduceEntriesToDoubleTask<K,V>)c,
6382	>	s = t.rights;
6383	>	while (s != null) {
6384	>	t.result = reducer.apply(t.result, s.result);
6385	>	s = t.rights = s.nextRight;
6386		}
5976	–	else if (t.casPending(c, c - 1))
5977	–	break;
6387		}
5979	–	} catch (Throwable ex) {
5980	–	return tryCompleteComputation(ex);
6388		}
5982	–	return false;
6389		}
5984	–	public final Double getRawResult() { return result; }
6390		}
6391
6392		@SuppressWarnings("serial") static final class MapReduceMappingsToDoubleTask<K,V>
6393	<	extends BulkTask<K,V,Double> {
6393	>	extends Traverser<K,V,Double> {
6394		final ObjectByObjectToDouble<? super K, ? super V> transformer;
6395		final DoubleByDoubleToDouble reducer;
6396		final double basis;
6397		double result;
6398		MapReduceMappingsToDoubleTask<K,V> rights, nextRight;
6399		MapReduceMappingsToDoubleTask
6400	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6400	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6401		MapReduceMappingsToDoubleTask<K,V> nextRight,
6402		ObjectByObjectToDouble<? super K, ? super V> transformer,
6403		double basis,
#	Line 6001 | Line 6406 | public class ConcurrentHashMapV8<K, V>
6406		this.transformer = transformer;
6407		this.basis = basis; this.reducer = reducer;
6408		}
6409	<	@SuppressWarnings("unchecked") public final boolean exec() {
6410	<	final ObjectByObjectToDouble<? super K, ? super V> transformer =
6411	<	this.transformer;
6412	<	final DoubleByDoubleToDouble reducer = this.reducer;
6413	<	if (transformer == null || reducer == null)
6414	<	return abortOnNullFunction();
6415	<	try {
6416	<	final double id = this.basis;
6012	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6013	<	do {} while (!casPending(c = pending, c+1));
6409	>	public final Double getRawResult() { return result; }
6410	>	@SuppressWarnings("unchecked") public final void compute() {
6411	>	final ObjectByObjectToDouble<? super K, ? super V> transformer;
6412	>	final DoubleByDoubleToDouble reducer;
6413	>	if ((transformer = this.transformer) != null &&
6414	>	(reducer = this.reducer) != null) {
6415	>	double r = this.basis;
6416	>	for (int b; (b = preSplit()) > 0;)
6417		(rights = new MapReduceMappingsToDoubleTask<K,V>
6418	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6419	<	}
6017	<	double r = id;
6018	<	Object v;
6418	>	(map, this, b, rights, transformer, r, reducer)).fork();
6419	>	V v;
6420		while ((v = advance()) != null)
6421	<	r = reducer.apply(r, transformer.apply((K)nextKey, (V)v));
6421	>	r = reducer.apply(r, transformer.apply((K)nextKey, v));
6422		result = r;
6423	<	for (MapReduceMappingsToDoubleTask<K,V> t = this, s;;) {
6424	<	int c; BulkTask<K,V,?> par;
6425	<	if ((c = t.pending) == 0) {
6426	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6427	<	t.result = reducer.apply(t.result, s.result);
6428	<	}
6429	<	if ((par = t.parent) == null ||
6430	<	!(par instanceof MapReduceMappingsToDoubleTask)) {
6030	<	t.quietlyComplete();
6031	<	break;
6032	<	}
6033	<	t = (MapReduceMappingsToDoubleTask<K,V>)par;
6423	>	CountedCompleter<?> c;
6424	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6425	>	MapReduceMappingsToDoubleTask<K,V>
6426	>	t = (MapReduceMappingsToDoubleTask<K,V>)c,
6427	>	s = t.rights;
6428	>	while (s != null) {
6429	>	t.result = reducer.apply(t.result, s.result);
6430	>	s = t.rights = s.nextRight;
6431		}
6035	–	else if (t.casPending(c, c - 1))
6036	–	break;
6432		}
6038	–	} catch (Throwable ex) {
6039	–	return tryCompleteComputation(ex);
6433		}
6041	–	return false;
6434		}
6043	–	public final Double getRawResult() { return result; }
6435		}
6436
6437		@SuppressWarnings("serial") static final class MapReduceKeysToLongTask<K,V>
6438	<	extends BulkTask<K,V,Long> {
6438	>	extends Traverser<K,V,Long> {
6439		final ObjectToLong<? super K> transformer;
6440		final LongByLongToLong reducer;
6441		final long basis;
6442		long result;
6443		MapReduceKeysToLongTask<K,V> rights, nextRight;
6444		MapReduceKeysToLongTask
6445	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6445	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6446		MapReduceKeysToLongTask<K,V> nextRight,
6447		ObjectToLong<? super K> transformer,
6448		long basis,
#	Line 6060 | Line 6451 | public class ConcurrentHashMapV8<K, V>
6451		this.transformer = transformer;
6452		this.basis = basis; this.reducer = reducer;
6453		}
6454	<	@SuppressWarnings("unchecked") public final boolean exec() {
6455	<	final ObjectToLong<? super K> transformer =
6456	<	this.transformer;
6457	<	final LongByLongToLong reducer = this.reducer;
6458	<	if (transformer == null || reducer == null)
6459	<	return abortOnNullFunction();
6460	<	try {
6461	<	final long id = this.basis;
6071	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6072	<	do {} while (!casPending(c = pending, c+1));
6454	>	public final Long getRawResult() { return result; }
6455	>	@SuppressWarnings("unchecked") public final void compute() {
6456	>	final ObjectToLong<? super K> transformer;
6457	>	final LongByLongToLong reducer;
6458	>	if ((transformer = this.transformer) != null &&
6459	>	(reducer = this.reducer) != null) {
6460	>	long r = this.basis;
6461	>	for (int b; (b = preSplit()) > 0;)
6462		(rights = new MapReduceKeysToLongTask<K,V>
6463	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6075	<	}
6076	<	long r = id;
6463	>	(map, this, b, rights, transformer, r, reducer)).fork();
6464		while (advance() != null)
6465		r = reducer.apply(r, transformer.apply((K)nextKey));
6466		result = r;
6467	<	for (MapReduceKeysToLongTask<K,V> t = this, s;;) {
6468	<	int c; BulkTask<K,V,?> par;
6469	<	if ((c = t.pending) == 0) {
6470	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6471	<	t.result = reducer.apply(t.result, s.result);
6472	<	}
6473	<	if ((par = t.parent) == null ||
6474	<	!(par instanceof MapReduceKeysToLongTask)) {
6088	<	t.quietlyComplete();
6089	<	break;
6090	<	}
6091	<	t = (MapReduceKeysToLongTask<K,V>)par;
6467	>	CountedCompleter<?> c;
6468	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6469	>	MapReduceKeysToLongTask<K,V>
6470	>	t = (MapReduceKeysToLongTask<K,V>)c,
6471	>	s = t.rights;
6472	>	while (s != null) {
6473	>	t.result = reducer.apply(t.result, s.result);
6474	>	s = t.rights = s.nextRight;
6475		}
6093	–	else if (t.casPending(c, c - 1))
6094	–	break;
6476		}
6096	–	} catch (Throwable ex) {
6097	–	return tryCompleteComputation(ex);
6477		}
6099	–	return false;
6478		}
6101	–	public final Long getRawResult() { return result; }
6479		}
6480
6481		@SuppressWarnings("serial") static final class MapReduceValuesToLongTask<K,V>
6482	<	extends BulkTask<K,V,Long> {
6482	>	extends Traverser<K,V,Long> {
6483		final ObjectToLong<? super V> transformer;
6484		final LongByLongToLong reducer;
6485		final long basis;
6486		long result;
6487		MapReduceValuesToLongTask<K,V> rights, nextRight;
6488		MapReduceValuesToLongTask
6489	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6489	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6490		MapReduceValuesToLongTask<K,V> nextRight,
6491		ObjectToLong<? super V> transformer,
6492		long basis,
#	Line 6118 | Line 6495 | public class ConcurrentHashMapV8<K, V>
6495		this.transformer = transformer;
6496		this.basis = basis; this.reducer = reducer;
6497		}
6498	<	@SuppressWarnings("unchecked") public final boolean exec() {
6499	<	final ObjectToLong<? super V> transformer =
6500	<	this.transformer;
6501	<	final LongByLongToLong reducer = this.reducer;
6502	<	if (transformer == null || reducer == null)
6503	<	return abortOnNullFunction();
6504	<	try {
6505	<	final long id = this.basis;
6129	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6130	<	do {} while (!casPending(c = pending, c+1));
6498	>	public final Long getRawResult() { return result; }
6499	>	@SuppressWarnings("unchecked") public final void compute() {
6500	>	final ObjectToLong<? super V> transformer;
6501	>	final LongByLongToLong reducer;
6502	>	if ((transformer = this.transformer) != null &&
6503	>	(reducer = this.reducer) != null) {
6504	>	long r = this.basis;
6505	>	for (int b; (b = preSplit()) > 0;)
6506		(rights = new MapReduceValuesToLongTask<K,V>
6507	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6508	<	}
6134	<	long r = id;
6135	<	Object v;
6507	>	(map, this, b, rights, transformer, r, reducer)).fork();
6508	>	V v;
6509		while ((v = advance()) != null)
6510	<	r = reducer.apply(r, transformer.apply((V)v));
6510	>	r = reducer.apply(r, transformer.apply(v));
6511		result = r;
6512	<	for (MapReduceValuesToLongTask<K,V> t = this, s;;) {
6513	<	int c; BulkTask<K,V,?> par;
6514	<	if ((c = t.pending) == 0) {
6515	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6516	<	t.result = reducer.apply(t.result, s.result);
6517	<	}
6518	<	if ((par = t.parent) == null ||
6519	<	!(par instanceof MapReduceValuesToLongTask)) {
6147	<	t.quietlyComplete();
6148	<	break;
6149	<	}
6150	<	t = (MapReduceValuesToLongTask<K,V>)par;
6512	>	CountedCompleter<?> c;
6513	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6514	>	MapReduceValuesToLongTask<K,V>
6515	>	t = (MapReduceValuesToLongTask<K,V>)c,
6516	>	s = t.rights;
6517	>	while (s != null) {
6518	>	t.result = reducer.apply(t.result, s.result);
6519	>	s = t.rights = s.nextRight;
6520		}
6152	–	else if (t.casPending(c, c - 1))
6153	–	break;
6521		}
6155	–	} catch (Throwable ex) {
6156	–	return tryCompleteComputation(ex);
6522		}
6158	–	return false;
6523		}
6160	–	public final Long getRawResult() { return result; }
6524		}
6525
6526		@SuppressWarnings("serial") static final class MapReduceEntriesToLongTask<K,V>
6527	<	extends BulkTask<K,V,Long> {
6527	>	extends Traverser<K,V,Long> {
6528		final ObjectToLong<Map.Entry<K,V>> transformer;
6529		final LongByLongToLong reducer;
6530		final long basis;
6531		long result;
6532		MapReduceEntriesToLongTask<K,V> rights, nextRight;
6533		MapReduceEntriesToLongTask
6534	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6534	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6535		MapReduceEntriesToLongTask<K,V> nextRight,
6536		ObjectToLong<Map.Entry<K,V>> transformer,
6537		long basis,
#	Line 6177 | Line 6540 | public class ConcurrentHashMapV8<K, V>
6540		this.transformer = transformer;
6541		this.basis = basis; this.reducer = reducer;
6542		}
6543	<	@SuppressWarnings("unchecked") public final boolean exec() {
6544	<	final ObjectToLong<Map.Entry<K,V>> transformer =
6545	<	this.transformer;
6546	<	final LongByLongToLong reducer = this.reducer;
6547	<	if (transformer == null || reducer == null)
6548	<	return abortOnNullFunction();
6549	<	try {
6550	<	final long id = this.basis;
6188	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6189	<	do {} while (!casPending(c = pending, c+1));
6543	>	public final Long getRawResult() { return result; }
6544	>	@SuppressWarnings("unchecked") public final void compute() {
6545	>	final ObjectToLong<Map.Entry<K,V>> transformer;
6546	>	final LongByLongToLong reducer;
6547	>	if ((transformer = this.transformer) != null &&
6548	>	(reducer = this.reducer) != null) {
6549	>	long r = this.basis;
6550	>	for (int b; (b = preSplit()) > 0;)
6551		(rights = new MapReduceEntriesToLongTask<K,V>
6552	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6553	<	}
6193	<	long r = id;
6194	<	Object v;
6552	>	(map, this, b, rights, transformer, r, reducer)).fork();
6553	>	V v;
6554		while ((v = advance()) != null)
6555	<	r = reducer.apply(r, transformer.apply(entryFor((K)nextKey, (V)v)));
6555	>	r = reducer.apply(r, transformer.apply(entryFor((K)nextKey,
6556	>	v)));
6557		result = r;
6558	<	for (MapReduceEntriesToLongTask<K,V> t = this, s;;) {
6559	<	int c; BulkTask<K,V,?> par;
6560	<	if ((c = t.pending) == 0) {
6561	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6562	<	t.result = reducer.apply(t.result, s.result);
6563	<	}
6564	<	if ((par = t.parent) == null ||
6565	<	!(par instanceof MapReduceEntriesToLongTask)) {
6206	<	t.quietlyComplete();
6207	<	break;
6208	<	}
6209	<	t = (MapReduceEntriesToLongTask<K,V>)par;
6558	>	CountedCompleter<?> c;
6559	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6560	>	MapReduceEntriesToLongTask<K,V>
6561	>	t = (MapReduceEntriesToLongTask<K,V>)c,
6562	>	s = t.rights;
6563	>	while (s != null) {
6564	>	t.result = reducer.apply(t.result, s.result);
6565	>	s = t.rights = s.nextRight;
6566		}
6211	–	else if (t.casPending(c, c - 1))
6212	–	break;
6567		}
6214	–	} catch (Throwable ex) {
6215	–	return tryCompleteComputation(ex);
6568		}
6217	–	return false;
6569		}
6219	–	public final Long getRawResult() { return result; }
6570		}
6571
6572		@SuppressWarnings("serial") static final class MapReduceMappingsToLongTask<K,V>
6573	<	extends BulkTask<K,V,Long> {
6573	>	extends Traverser<K,V,Long> {
6574		final ObjectByObjectToLong<? super K, ? super V> transformer;
6575		final LongByLongToLong reducer;
6576		final long basis;
6577		long result;
6578		MapReduceMappingsToLongTask<K,V> rights, nextRight;
6579		MapReduceMappingsToLongTask
6580	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6580	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6581		MapReduceMappingsToLongTask<K,V> nextRight,
6582		ObjectByObjectToLong<? super K, ? super V> transformer,
6583		long basis,
#	Line 6236 | Line 6586 | public class ConcurrentHashMapV8<K, V>
6586		this.transformer = transformer;
6587		this.basis = basis; this.reducer = reducer;
6588		}
6589	<	@SuppressWarnings("unchecked") public final boolean exec() {
6590	<	final ObjectByObjectToLong<? super K, ? super V> transformer =
6591	<	this.transformer;
6592	<	final LongByLongToLong reducer = this.reducer;
6593	<	if (transformer == null || reducer == null)
6594	<	return abortOnNullFunction();
6595	<	try {
6596	<	final long id = this.basis;
6247	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6248	<	do {} while (!casPending(c = pending, c+1));
6589	>	public final Long getRawResult() { return result; }
6590	>	@SuppressWarnings("unchecked") public final void compute() {
6591	>	final ObjectByObjectToLong<? super K, ? super V> transformer;
6592	>	final LongByLongToLong reducer;
6593	>	if ((transformer = this.transformer) != null &&
6594	>	(reducer = this.reducer) != null) {
6595	>	long r = this.basis;
6596	>	for (int b; (b = preSplit()) > 0;)
6597		(rights = new MapReduceMappingsToLongTask<K,V>
6598	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6599	<	}
6252	<	long r = id;
6253	<	Object v;
6598	>	(map, this, b, rights, transformer, r, reducer)).fork();
6599	>	V v;
6600		while ((v = advance()) != null)
6601	<	r = reducer.apply(r, transformer.apply((K)nextKey, (V)v));
6601	>	r = reducer.apply(r, transformer.apply((K)nextKey, v));
6602		result = r;
6603	<	for (MapReduceMappingsToLongTask<K,V> t = this, s;;) {
6604	<	int c; BulkTask<K,V,?> par;
6605	<	if ((c = t.pending) == 0) {
6606	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6607	<	t.result = reducer.apply(t.result, s.result);
6608	<	}
6609	<	if ((par = t.parent) == null ||
6610	<	!(par instanceof MapReduceMappingsToLongTask)) {
6265	<	t.quietlyComplete();
6266	<	break;
6267	<	}
6268	<	t = (MapReduceMappingsToLongTask<K,V>)par;
6603	>	CountedCompleter<?> c;
6604	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6605	>	MapReduceMappingsToLongTask<K,V>
6606	>	t = (MapReduceMappingsToLongTask<K,V>)c,
6607	>	s = t.rights;
6608	>	while (s != null) {
6609	>	t.result = reducer.apply(t.result, s.result);
6610	>	s = t.rights = s.nextRight;
6611		}
6270	–	else if (t.casPending(c, c - 1))
6271	–	break;
6612		}
6273	–	} catch (Throwable ex) {
6274	–	return tryCompleteComputation(ex);
6613		}
6276	–	return false;
6614		}
6278	–	public final Long getRawResult() { return result; }
6615		}
6616
6617		@SuppressWarnings("serial") static final class MapReduceKeysToIntTask<K,V>
6618	<	extends BulkTask<K,V,Integer> {
6618	>	extends Traverser<K,V,Integer> {
6619		final ObjectToInt<? super K> transformer;
6620		final IntByIntToInt reducer;
6621		final int basis;
6622		int result;
6623		MapReduceKeysToIntTask<K,V> rights, nextRight;
6624		MapReduceKeysToIntTask
6625	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6625	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6626		MapReduceKeysToIntTask<K,V> nextRight,
6627		ObjectToInt<? super K> transformer,
6628		int basis,
#	Line 6295 | Line 6631 | public class ConcurrentHashMapV8<K, V>
6631		this.transformer = transformer;
6632		this.basis = basis; this.reducer = reducer;
6633		}
6634	<	@SuppressWarnings("unchecked") public final boolean exec() {
6635	<	final ObjectToInt<? super K> transformer =
6636	<	this.transformer;
6637	<	final IntByIntToInt reducer = this.reducer;
6638	<	if (transformer == null || reducer == null)
6639	<	return abortOnNullFunction();
6640	<	try {
6641	<	final int id = this.basis;
6306	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6307	<	do {} while (!casPending(c = pending, c+1));
6634	>	public final Integer getRawResult() { return result; }
6635	>	@SuppressWarnings("unchecked") public final void compute() {
6636	>	final ObjectToInt<? super K> transformer;
6637	>	final IntByIntToInt reducer;
6638	>	if ((transformer = this.transformer) != null &&
6639	>	(reducer = this.reducer) != null) {
6640	>	int r = this.basis;
6641	>	for (int b; (b = preSplit()) > 0;)
6642		(rights = new MapReduceKeysToIntTask<K,V>
6643	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6310	<	}
6311	<	int r = id;
6643	>	(map, this, b, rights, transformer, r, reducer)).fork();
6644		while (advance() != null)
6645		r = reducer.apply(r, transformer.apply((K)nextKey));
6646		result = r;
6647	<	for (MapReduceKeysToIntTask<K,V> t = this, s;;) {
6648	<	int c; BulkTask<K,V,?> par;
6649	<	if ((c = t.pending) == 0) {
6650	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6651	<	t.result = reducer.apply(t.result, s.result);
6652	<	}
6653	<	if ((par = t.parent) == null ||
6654	<	!(par instanceof MapReduceKeysToIntTask)) {
6323	<	t.quietlyComplete();
6324	<	break;
6325	<	}
6326	<	t = (MapReduceKeysToIntTask<K,V>)par;
6647	>	CountedCompleter<?> c;
6648	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6649	>	MapReduceKeysToIntTask<K,V>
6650	>	t = (MapReduceKeysToIntTask<K,V>)c,
6651	>	s = t.rights;
6652	>	while (s != null) {
6653	>	t.result = reducer.apply(t.result, s.result);
6654	>	s = t.rights = s.nextRight;
6655		}
6328	–	else if (t.casPending(c, c - 1))
6329	–	break;
6656		}
6331	–	} catch (Throwable ex) {
6332	–	return tryCompleteComputation(ex);
6657		}
6334	–	return false;
6658		}
6336	–	public final Integer getRawResult() { return result; }
6659		}
6660
6661		@SuppressWarnings("serial") static final class MapReduceValuesToIntTask<K,V>
6662	<	extends BulkTask<K,V,Integer> {
6662	>	extends Traverser<K,V,Integer> {
6663		final ObjectToInt<? super V> transformer;
6664		final IntByIntToInt reducer;
6665		final int basis;
6666		int result;
6667		MapReduceValuesToIntTask<K,V> rights, nextRight;
6668		MapReduceValuesToIntTask
6669	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6669	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6670		MapReduceValuesToIntTask<K,V> nextRight,
6671		ObjectToInt<? super V> transformer,
6672		int basis,
#	Line 6353 | Line 6675 | public class ConcurrentHashMapV8<K, V>
6675		this.transformer = transformer;
6676		this.basis = basis; this.reducer = reducer;
6677		}
6678	<	@SuppressWarnings("unchecked") public final boolean exec() {
6679	<	final ObjectToInt<? super V> transformer =
6680	<	this.transformer;
6681	<	final IntByIntToInt reducer = this.reducer;
6682	<	if (transformer == null || reducer == null)
6683	<	return abortOnNullFunction();
6684	<	try {
6685	<	final int id = this.basis;
6364	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6365	<	do {} while (!casPending(c = pending, c+1));
6678	>	public final Integer getRawResult() { return result; }
6679	>	@SuppressWarnings("unchecked") public final void compute() {
6680	>	final ObjectToInt<? super V> transformer;
6681	>	final IntByIntToInt reducer;
6682	>	if ((transformer = this.transformer) != null &&
6683	>	(reducer = this.reducer) != null) {
6684	>	int r = this.basis;
6685	>	for (int b; (b = preSplit()) > 0;)
6686		(rights = new MapReduceValuesToIntTask<K,V>
6687	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6688	<	}
6369	<	int r = id;
6370	<	Object v;
6687	>	(map, this, b, rights, transformer, r, reducer)).fork();
6688	>	V v;
6689		while ((v = advance()) != null)
6690	<	r = reducer.apply(r, transformer.apply((V)v));
6690	>	r = reducer.apply(r, transformer.apply(v));
6691		result = r;
6692	<	for (MapReduceValuesToIntTask<K,V> t = this, s;;) {
6693	<	int c; BulkTask<K,V,?> par;
6694	<	if ((c = t.pending) == 0) {
6695	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6696	<	t.result = reducer.apply(t.result, s.result);
6697	<	}
6698	<	if ((par = t.parent) == null ||
6699	<	!(par instanceof MapReduceValuesToIntTask)) {
6382	<	t.quietlyComplete();
6383	<	break;
6384	<	}
6385	<	t = (MapReduceValuesToIntTask<K,V>)par;
6692	>	CountedCompleter<?> c;
6693	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6694	>	MapReduceValuesToIntTask<K,V>
6695	>	t = (MapReduceValuesToIntTask<K,V>)c,
6696	>	s = t.rights;
6697	>	while (s != null) {
6698	>	t.result = reducer.apply(t.result, s.result);
6699	>	s = t.rights = s.nextRight;
6700		}
6387	–	else if (t.casPending(c, c - 1))
6388	–	break;
6701		}
6390	–	} catch (Throwable ex) {
6391	–	return tryCompleteComputation(ex);
6702		}
6393	–	return false;
6703		}
6395	–	public final Integer getRawResult() { return result; }
6704		}
6705
6706		@SuppressWarnings("serial") static final class MapReduceEntriesToIntTask<K,V>
6707	<	extends BulkTask<K,V,Integer> {
6707	>	extends Traverser<K,V,Integer> {
6708		final ObjectToInt<Map.Entry<K,V>> transformer;
6709		final IntByIntToInt reducer;
6710		final int basis;
6711		int result;
6712		MapReduceEntriesToIntTask<K,V> rights, nextRight;
6713		MapReduceEntriesToIntTask
6714	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6714	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6715		MapReduceEntriesToIntTask<K,V> nextRight,
6716		ObjectToInt<Map.Entry<K,V>> transformer,
6717		int basis,
#	Line 6412 | Line 6720 | public class ConcurrentHashMapV8<K, V>
6720		this.transformer = transformer;
6721		this.basis = basis; this.reducer = reducer;
6722		}
6723	<	@SuppressWarnings("unchecked") public final boolean exec() {
6724	<	final ObjectToInt<Map.Entry<K,V>> transformer =
6725	<	this.transformer;
6726	<	final IntByIntToInt reducer = this.reducer;
6727	<	if (transformer == null || reducer == null)
6728	<	return abortOnNullFunction();
6729	<	try {
6730	<	final int id = this.basis;
6423	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6424	<	do {} while (!casPending(c = pending, c+1));
6723	>	public final Integer getRawResult() { return result; }
6724	>	@SuppressWarnings("unchecked") public final void compute() {
6725	>	final ObjectToInt<Map.Entry<K,V>> transformer;
6726	>	final IntByIntToInt reducer;
6727	>	if ((transformer = this.transformer) != null &&
6728	>	(reducer = this.reducer) != null) {
6729	>	int r = this.basis;
6730	>	for (int b; (b = preSplit()) > 0;)
6731		(rights = new MapReduceEntriesToIntTask<K,V>
6732	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6733	<	}
6428	<	int r = id;
6429	<	Object v;
6732	>	(map, this, b, rights, transformer, r, reducer)).fork();
6733	>	V v;
6734		while ((v = advance()) != null)
6735	<	r = reducer.apply(r, transformer.apply(entryFor((K)nextKey, (V)v)));
6735	>	r = reducer.apply(r, transformer.apply(entryFor((K)nextKey,
6736	>	v)));
6737		result = r;
6738	<	for (MapReduceEntriesToIntTask<K,V> t = this, s;;) {
6739	<	int c; BulkTask<K,V,?> par;
6740	<	if ((c = t.pending) == 0) {
6741	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6742	<	t.result = reducer.apply(t.result, s.result);
6743	<	}
6744	<	if ((par = t.parent) == null ||
6745	<	!(par instanceof MapReduceEntriesToIntTask)) {
6441	<	t.quietlyComplete();
6442	<	break;
6443	<	}
6444	<	t = (MapReduceEntriesToIntTask<K,V>)par;
6738	>	CountedCompleter<?> c;
6739	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6740	>	MapReduceEntriesToIntTask<K,V>
6741	>	t = (MapReduceEntriesToIntTask<K,V>)c,
6742	>	s = t.rights;
6743	>	while (s != null) {
6744	>	t.result = reducer.apply(t.result, s.result);
6745	>	s = t.rights = s.nextRight;
6746		}
6446	–	else if (t.casPending(c, c - 1))
6447	–	break;
6747		}
6449	–	} catch (Throwable ex) {
6450	–	return tryCompleteComputation(ex);
6748		}
6452	–	return false;
6749		}
6454	–	public final Integer getRawResult() { return result; }
6750		}
6751
6752		@SuppressWarnings("serial") static final class MapReduceMappingsToIntTask<K,V>
6753	<	extends BulkTask<K,V,Integer> {
6753	>	extends Traverser<K,V,Integer> {
6754		final ObjectByObjectToInt<? super K, ? super V> transformer;
6755		final IntByIntToInt reducer;
6756		final int basis;
6757		int result;
6758		MapReduceMappingsToIntTask<K,V> rights, nextRight;
6759		MapReduceMappingsToIntTask
6760	<	(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b,
6761	<	MapReduceMappingsToIntTask<K,V> rights,
6760	>	(ConcurrentHashMapV8<K,V> m, Traverser<K,V,?> p, int b,
6761	>	MapReduceMappingsToIntTask<K,V> nextRight,
6762		ObjectByObjectToInt<? super K, ? super V> transformer,
6763		int basis,
6764		IntByIntToInt reducer) {
#	Line 6471 | Line 6766 | public class ConcurrentHashMapV8<K, V>
6766		this.transformer = transformer;
6767		this.basis = basis; this.reducer = reducer;
6768		}
6769	<	@SuppressWarnings("unchecked") public final boolean exec() {
6770	<	final ObjectByObjectToInt<? super K, ? super V> transformer =
6771	<	this.transformer;
6772	<	final IntByIntToInt reducer = this.reducer;
6773	<	if (transformer == null || reducer == null)
6774	<	return abortOnNullFunction();
6775	<	try {
6776	<	final int id = this.basis;
6482	<	for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) {
6483	<	do {} while (!casPending(c = pending, c+1));
6769	>	public final Integer getRawResult() { return result; }
6770	>	@SuppressWarnings("unchecked") public final void compute() {
6771	>	final ObjectByObjectToInt<? super K, ? super V> transformer;
6772	>	final IntByIntToInt reducer;
6773	>	if ((transformer = this.transformer) != null &&
6774	>	(reducer = this.reducer) != null) {
6775	>	int r = this.basis;
6776	>	for (int b; (b = preSplit()) > 0;)
6777		(rights = new MapReduceMappingsToIntTask<K,V>
6778	<	(map, this, b >>>= 1, rights, transformer, id, reducer)).fork();
6779	<	}
6487	<	int r = id;
6488	<	Object v;
6778	>	(map, this, b, rights, transformer, r, reducer)).fork();
6779	>	V v;
6780		while ((v = advance()) != null)
6781	<	r = reducer.apply(r, transformer.apply((K)nextKey, (V)v));
6781	>	r = reducer.apply(r, transformer.apply((K)nextKey, v));
6782		result = r;
6783	<	for (MapReduceMappingsToIntTask<K,V> t = this, s;;) {
6784	<	int c; BulkTask<K,V,?> par;
6785	<	if ((c = t.pending) == 0) {
6786	<	for (s = t.rights; s != null; s = t.rights = s.nextRight) {
6787	<	t.result = reducer.apply(t.result, s.result);
6788	<	}
6789	<	if ((par = t.parent) == null ||
6790	<	!(par instanceof MapReduceMappingsToIntTask)) {
6500	<	t.quietlyComplete();
6501	<	break;
6502	<	}
6503	<	t = (MapReduceMappingsToIntTask<K,V>)par;
6783	>	CountedCompleter<?> c;
6784	>	for (c = firstComplete(); c != null; c = c.nextComplete()) {
6785	>	MapReduceMappingsToIntTask<K,V>
6786	>	t = (MapReduceMappingsToIntTask<K,V>)c,
6787	>	s = t.rights;
6788	>	while (s != null) {
6789	>	t.result = reducer.apply(t.result, s.result);
6790	>	s = t.rights = s.nextRight;
6791		}
6505	–	else if (t.casPending(c, c - 1))
6506	–	break;
6792		}
6508	–	} catch (Throwable ex) {
6509	–	return tryCompleteComputation(ex);
6793		}
6511	–	return false;
6794		}
6513	–	public final Integer getRawResult() { return result; }
6795		}
6796
6516	–
6797		// Unsafe mechanics
6798	<	private static final sun.misc.Unsafe UNSAFE;
6799	<	private static final long counterOffset;
6800	<	private static final long sizeCtlOffset;
6798	>	private static final sun.misc.Unsafe U;
6799	>	private static final long SIZECTL;
6800	>	private static final long TRANSFERINDEX;
6801	>	private static final long TRANSFERORIGIN;
6802	>	private static final long BASECOUNT;
6803	>	private static final long COUNTERBUSY;
6804	>	private static final long CELLVALUE;
6805		private static final long ABASE;
6806		private static final int ASHIFT;
6807
6808		static {
6809		int ss;
6810		try {
6811	<	UNSAFE = getUnsafe();
6811	>	U = getUnsafe();
6812		Class<?> k = ConcurrentHashMapV8.class;
6813	<	counterOffset = UNSAFE.objectFieldOffset
6530	<	(k.getDeclaredField("counter"));
6531	<	sizeCtlOffset = UNSAFE.objectFieldOffset
6813	>	SIZECTL = U.objectFieldOffset
6814		(k.getDeclaredField("sizeCtl"));
6815	+	TRANSFERINDEX = U.objectFieldOffset
6816	+	(k.getDeclaredField("transferIndex"));
6817	+	TRANSFERORIGIN = U.objectFieldOffset
6818	+	(k.getDeclaredField("transferOrigin"));
6819	+	BASECOUNT = U.objectFieldOffset
6820	+	(k.getDeclaredField("baseCount"));
6821	+	COUNTERBUSY = U.objectFieldOffset
6822	+	(k.getDeclaredField("counterBusy"));
6823	+	Class<?> ck = CounterCell.class;
6824	+	CELLVALUE = U.objectFieldOffset
6825	+	(ck.getDeclaredField("value"));
6826		Class<?> sc = Node[].class;
6827	<	ABASE = UNSAFE.arrayBaseOffset(sc);
6828	<	ss = UNSAFE.arrayIndexScale(sc);
6827	>	ABASE = U.arrayBaseOffset(sc);
6828	>	ss = U.arrayIndexScale(sc);
6829	>	ASHIFT = 31 - Integer.numberOfLeadingZeros(ss);
6830		} catch (Exception e) {
6831		throw new Error(e);
6832		}
6833		if ((ss & (ss-1)) != 0)
6834		throw new Error("data type scale not a power of two");
6541	–	ASHIFT = 31 - Integer.numberOfLeadingZeros(ss);
6835		}
6836
6837		/**

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