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/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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1.2 |
*/ |
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1.1 |
package java.util.concurrent; |
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import java.util.concurrent.atomic.LongAdder; |
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import java.util.concurrent.ForkJoinPool; |
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import java.util.concurrent.ForkJoinTask; |
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import java.util.Comparator; |
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import java.util.Arrays; |
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import java.util.Map; |
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import java.util.Set; |
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import java.util.Collection; |
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import java.util.AbstractMap; |
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import java.util.AbstractSet; |
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import java.util.AbstractCollection; |
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import java.util.Hashtable; |
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import java.util.HashMap; |
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import java.util.Iterator; |
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import java.util.Enumeration; |
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import java.util.ConcurrentModificationException; |
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import java.util.NoSuchElementException; |
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import java.util.concurrent.ConcurrentMap; |
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import java.util.concurrent.ThreadLocalRandom; |
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import java.util.concurrent.locks.LockSupport; |
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import java.util.concurrent.locks.AbstractQueuedSynchronizer; |
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import java.util.concurrent.atomic.AtomicReference; |
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import java.io.Serializable; |
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/** |
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1.4 |
* A hash table supporting full concurrency of retrievals and |
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1.119 |
* high expected concurrency for updates. This class obeys the |
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* same functional specification as {@link java.util.Hashtable}, and |
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1.19 |
* includes versions of methods corresponding to each method of |
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* {@code Hashtable}. However, even though all operations are |
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* thread-safe, retrieval operations do <em>not</em> entail locking, |
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* and there is <em>not</em> any support for locking the entire table |
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* in a way that prevents all access. This class is fully |
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* interoperable with {@code Hashtable} in programs that rely on its |
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* thread safety but not on its synchronization details. |
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1.11 |
* |
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* <p> Retrieval operations (including {@code get}) generally do not |
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* block, so may overlap with update operations (including {@code put} |
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* and {@code remove}). Retrievals reflect the results of the most |
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* recently <em>completed</em> update operations holding upon their |
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* onset. (More formally, an update operation for a given key bears a |
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* <em>happens-before</em> relation with any (non-null) retrieval for |
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* that key reporting the updated value.) For aggregate operations |
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* such as {@code putAll} and {@code clear}, concurrent retrievals may |
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* reflect insertion or removal of only some entries. Similarly, |
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* Iterators and Enumerations return elements reflecting the state of |
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* the hash table at some point at or since the creation of the |
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* iterator/enumeration. They do <em>not</em> throw {@link |
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* ConcurrentModificationException}. However, iterators are designed |
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* to be used by only one thread at a time. Bear in mind that the |
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* results of aggregate status methods including {@code size}, {@code |
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* isEmpty}, and {@code containsValue} are typically useful only when |
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* a map is not undergoing concurrent updates in other threads. |
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* Otherwise the results of these methods reflect transient states |
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* that may be adequate for monitoring or estimation purposes, but not |
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* for program control. |
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* |
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* <p> The table is dynamically expanded when there are too many |
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* collisions (i.e., keys that have distinct hash codes but fall into |
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* the same slot modulo the table size), with the expected average |
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* effect of maintaining roughly two bins per mapping (corresponding |
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* to a 0.75 load factor threshold for resizing). There may be much |
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* variance around this average as mappings are added and removed, but |
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* overall, this maintains a commonly accepted time/space tradeoff for |
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* hash tables. However, resizing this or any other kind of hash |
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* table may be a relatively slow operation. When possible, it is a |
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* good idea to provide a size estimate as an optional {@code |
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* initialCapacity} constructor argument. An additional optional |
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* {@code loadFactor} constructor argument provides a further means of |
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* customizing initial table capacity by specifying the table density |
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* to be used in calculating the amount of space to allocate for the |
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* given number of elements. Also, for compatibility with previous |
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* versions of this class, constructors may optionally specify an |
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* expected {@code concurrencyLevel} as an additional hint for |
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* internal sizing. Note that using many keys with exactly the same |
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* {@code hashCode()} is a sure way to slow down performance of any |
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* hash table. |
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* |
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* <p>This class and its views and iterators implement all of the |
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* <em>optional</em> methods of the {@link Map} and {@link Iterator} |
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* interfaces. |
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* |
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* <p> Like {@link Hashtable} but unlike {@link HashMap}, this class |
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* does <em>not</em> allow {@code null} to be used as a key or value. |
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* |
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* <p>This class is a member of the |
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* <a href="{@docRoot}/../technotes/guides/collections/index.html"> |
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* Java Collections Framework</a>. |
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* |
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* <p><em>jsr166e note: This class is a candidate replacement for |
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* java.util.concurrent.ConcurrentHashMap. During transition, this |
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* class declares and uses nested functional interfaces with different |
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* names but the same forms as those expected for JDK8.<em> |
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* |
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* @since 1.5 |
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* @author Doug Lea |
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* @param <K> the type of keys maintained by this map |
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* @param <V> the type of mapped values |
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*/ |
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public class ConcurrentHashMap<K, V> |
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implements ConcurrentMap<K, V>, Serializable { |
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private static final long serialVersionUID = 7249069246763182397L; |
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|
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/** |
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* A partitionable iterator. A Spliterator can be traversed |
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* directly, but can also be partitioned (before traversal) by |
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* creating another Spliterator that covers a non-overlapping |
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* portion of the elements, and so may be amenable to parallel |
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* execution. |
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* |
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* <p> This interface exports a subset of expected JDK8 |
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* functionality. |
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* |
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* <p>Sample usage: Here is one (of the several) ways to compute |
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* the sum of the values held in a map using the ForkJoin |
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* framework. As illustrated here, Spliterators are well suited to |
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* designs in which a task repeatedly splits off half its work |
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* into forked subtasks until small enough to process directly, |
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* and then joins these subtasks. Variants of this style can also |
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* be used in completion-based designs. |
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* |
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* <pre> |
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* {@code ConcurrentHashMap<String, Long> m = ... |
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* // split as if have 8 * parallelism, for load balance |
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* int n = m.size(); |
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* int p = aForkJoinPool.getParallelism() * 8; |
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* int split = (n < p)? n : p; |
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* long sum = aForkJoinPool.invoke(new SumValues(m.valueSpliterator(), split, null)); |
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* // ... |
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* static class SumValues extends RecursiveTask<Long> { |
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* final Spliterator<Long> s; |
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* final int split; // split while > 1 |
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* final SumValues nextJoin; // records forked subtasks to join |
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* SumValues(Spliterator<Long> s, int depth, SumValues nextJoin) { |
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* this.s = s; this.depth = depth; this.nextJoin = nextJoin; |
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* } |
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* public Long compute() { |
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* long sum = 0; |
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* SumValues subtasks = null; // fork subtasks |
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* for (int s = split >>> 1; s > 0; s >>>= 1) |
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* (subtasks = new SumValues(s.split(), s, subtasks)).fork(); |
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* while (s.hasNext()) // directly process remaining elements |
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* sum += s.next(); |
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* for (SumValues t = subtasks; t != null; t = t.nextJoin) |
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* sum += t.join(); // collect subtask results |
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* return sum; |
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* } |
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* } |
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* }</pre> |
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*/ |
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public static interface Spliterator<T> extends Iterator<T> { |
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/** |
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* Returns a Spliterator covering approximately half of the |
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* elements, guaranteed not to overlap with those subsequently |
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* returned by this Spliterator. After invoking this method, |
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* the current Spliterator will <em>not</em> produce any of |
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* the elements of the returned Spliterator, but the two |
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* Spliterators together will produce all of the elements that |
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* would have been produced by this Spliterator had this |
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* method not been called. The exact number of elements |
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* produced by the returned Spliterator is not guaranteed, and |
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* may be zero (i.e., with {@code hasNext()} reporting {@code |
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* false}) if this Spliterator cannot be further split. |
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* |
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* @return a Spliterator covering approximately half of the |
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* elements |
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* @throws IllegalStateException if this Spliterator has |
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* already commenced traversing elements |
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*/ |
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Spliterator<T> split(); |
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} |
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1.1 |
/* |
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1.119 |
* Overview: |
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* |
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* The primary design goal of this hash table is to maintain |
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* concurrent readability (typically method get(), but also |
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* iterators and related methods) while minimizing update |
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* contention. Secondary goals are to keep space consumption about |
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* the same or better than java.util.HashMap, and to support high |
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* initial insertion rates on an empty table by many threads. |
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* |
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* Each key-value mapping is held in a Node. Because Node fields |
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* can contain special values, they are defined using plain Object |
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* types. Similarly in turn, all internal methods that use them |
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* work off Object types. And similarly, so do the internal |
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* methods of auxiliary iterator and view classes. All public |
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* generic typed methods relay in/out of these internal methods, |
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* supplying null-checks and casts as needed. This also allows |
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* many of the public methods to be factored into a smaller number |
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* of internal methods (although sadly not so for the five |
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* variants of put-related operations). The validation-based |
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* approach explained below leads to a lot of code sprawl because |
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* retry-control precludes factoring into smaller methods. |
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* |
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* The table is lazily initialized to a power-of-two size upon the |
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* first insertion. Each bin in the table normally contains a |
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* list of Nodes (most often, the list has only zero or one Node). |
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* Table accesses require volatile/atomic reads, writes, and |
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* CASes. Because there is no other way to arrange this without |
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* adding further indirections, we use intrinsics |
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* (sun.misc.Unsafe) operations. The lists of nodes within bins |
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* are always accurately traversable under volatile reads, so long |
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* as lookups check hash code and non-nullness of value before |
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* checking key equality. |
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* |
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* We use the top two bits of Node hash fields for control |
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* purposes -- they are available anyway because of addressing |
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* constraints. As explained further below, these top bits are |
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* used as follows: |
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* 00 - Normal |
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* 01 - Locked |
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* 11 - Locked and may have a thread waiting for lock |
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* 10 - Node is a forwarding node |
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* |
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* The lower 30 bits of each Node's hash field contain a |
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* transformation of the key's hash code, except for forwarding |
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* nodes, for which the lower bits are zero (and so always have |
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* hash field == MOVED). |
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* |
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* Insertion (via put or its variants) of the first node in an |
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* empty bin is performed by just CASing it to the bin. This is |
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* by far the most common case for put operations under most |
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* key/hash distributions. Other update operations (insert, |
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* delete, and replace) require locks. We do not want to waste |
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* the space required to associate a distinct lock object with |
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* each bin, so instead use the first node of a bin list itself as |
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* a lock. Blocking support for these locks relies on the builtin |
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* "synchronized" monitors. However, we also need a tryLock |
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* construction, so we overlay these by using bits of the Node |
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* hash field for lock control (see above), and so normally use |
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* builtin monitors only for blocking and signalling using |
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* wait/notifyAll constructions. See Node.tryAwaitLock. |
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* |
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* Using the first node of a list as a lock does not by itself |
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* suffice though: When a node is locked, any update must first |
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* validate that it is still the first node after locking it, and |
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* retry if not. Because new nodes are always appended to lists, |
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* once a node is first in a bin, it remains first until deleted |
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* or the bin becomes invalidated (upon resizing). However, |
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* operations that only conditionally update may inspect nodes |
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* until the point of update. This is a converse of sorts to the |
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* lazy locking technique described by Herlihy & Shavit. |
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* |
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* The main disadvantage of per-bin locks is that other update |
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* operations on other nodes in a bin list protected by the same |
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* lock can stall, for example when user equals() or mapping |
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* functions take a long time. However, statistically, under |
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* random hash codes, this is not a common problem. Ideally, the |
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* frequency of nodes in bins follows a Poisson distribution |
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* (http://en.wikipedia.org/wiki/Poisson_distribution) with a |
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* parameter of about 0.5 on average, given the resizing threshold |
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* of 0.75, although with a large variance because of resizing |
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* granularity. Ignoring variance, the expected occurrences of |
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* list size k are (exp(-0.5) * pow(0.5, k) / factorial(k)). The |
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* first values are: |
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* |
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* 0: 0.60653066 |
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* 1: 0.30326533 |
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* 2: 0.07581633 |
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* 3: 0.01263606 |
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* 4: 0.00157952 |
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* 5: 0.00015795 |
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* 6: 0.00001316 |
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* 7: 0.00000094 |
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* 8: 0.00000006 |
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* more: less than 1 in ten million |
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* |
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* Lock contention probability for two threads accessing distinct |
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* elements is roughly 1 / (8 * #elements) under random hashes. |
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* |
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* Actual hash code distributions encountered in practice |
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* sometimes deviate significantly from uniform randomness. This |
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* includes the case when N > (1<<30), so some keys MUST collide. |
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* Similarly for dumb or hostile usages in which multiple keys are |
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* designed to have identical hash codes. Also, although we guard |
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* against the worst effects of this (see method spread), sets of |
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* hashes may differ only in bits that do not impact their bin |
288 |
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* index for a given power-of-two mask. So we use a secondary |
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* strategy that applies when the number of nodes in a bin exceeds |
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* a threshold, and at least one of the keys implements |
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* Comparable. These TreeBins use a balanced tree to hold nodes |
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* (a specialized form of red-black trees), bounding search time |
293 |
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* to O(log N). Each search step in a TreeBin is around twice as |
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* slow as in a regular list, but given that N cannot exceed |
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* (1<<64) (before running out of addresses) this bounds search |
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* steps, lock hold times, etc, to reasonable constants (roughly |
297 |
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* 100 nodes inspected per operation worst case) so long as keys |
298 |
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* are Comparable (which is very common -- String, Long, etc). |
299 |
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* TreeBin nodes (TreeNodes) also maintain the same "next" |
300 |
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* traversal pointers as regular nodes, so can be traversed in |
301 |
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* iterators in the same way. |
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* |
303 |
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* The table is resized when occupancy exceeds a percentage |
304 |
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* threshold (nominally, 0.75, but see below). Only a single |
305 |
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* thread performs the resize (using field "sizeCtl", to arrange |
306 |
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* exclusion), but the table otherwise remains usable for reads |
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* and updates. Resizing proceeds by transferring bins, one by |
308 |
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* one, from the table to the next table. Because we are using |
309 |
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* power-of-two expansion, the elements from each bin must either |
310 |
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* stay at same index, or move with a power of two offset. We |
311 |
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* eliminate unnecessary node creation by catching cases where old |
312 |
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* nodes can be reused because their next fields won't change. On |
313 |
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* average, only about one-sixth of them need cloning when a table |
314 |
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* doubles. The nodes they replace will be garbage collectable as |
315 |
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* soon as they are no longer referenced by any reader thread that |
316 |
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* may be in the midst of concurrently traversing table. Upon |
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* transfer, the old table bin contains only a special forwarding |
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* node (with hash field "MOVED") that contains the next table as |
319 |
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* its key. On encountering a forwarding node, access and update |
320 |
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* operations restart, using the new table. |
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* |
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* Each bin transfer requires its bin lock. However, unlike other |
323 |
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* cases, a transfer can skip a bin if it fails to acquire its |
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* lock, and revisit it later (unless it is a TreeBin). Method |
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* rebuild maintains a buffer of TRANSFER_BUFFER_SIZE bins that |
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* have been skipped because of failure to acquire a lock, and |
327 |
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* blocks only if none are available (i.e., only very rarely). |
328 |
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* The transfer operation must also ensure that all accessible |
329 |
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* bins in both the old and new table are usable by any traversal. |
330 |
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* When there are no lock acquisition failures, this is arranged |
331 |
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* simply by proceeding from the last bin (table.length - 1) up |
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* towards the first. Upon seeing a forwarding node, traversals |
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|
|
* (see class Iter) arrange to move to the new table |
334 |
|
|
* without revisiting nodes. However, when any node is skipped |
335 |
|
|
* during a transfer, all earlier table bins may have become |
336 |
|
|
* visible, so are initialized with a reverse-forwarding node back |
337 |
|
|
* to the old table until the new ones are established. (This |
338 |
|
|
* sometimes requires transiently locking a forwarding node, which |
339 |
|
|
* is possible under the above encoding.) These more expensive |
340 |
|
|
* mechanics trigger only when necessary. |
341 |
|
|
* |
342 |
|
|
* The traversal scheme also applies to partial traversals of |
343 |
|
|
* ranges of bins (via an alternate Traverser constructor) |
344 |
|
|
* to support partitioned aggregate operations. Also, read-only |
345 |
|
|
* operations give up if ever forwarded to a null table, which |
346 |
|
|
* provides support for shutdown-style clearing, which is also not |
347 |
|
|
* currently implemented. |
348 |
|
|
* |
349 |
|
|
* Lazy table initialization minimizes footprint until first use, |
350 |
|
|
* and also avoids resizings when the first operation is from a |
351 |
|
|
* putAll, constructor with map argument, or deserialization. |
352 |
|
|
* These cases attempt to override the initial capacity settings, |
353 |
|
|
* but harmlessly fail to take effect in cases of races. |
354 |
|
|
* |
355 |
|
|
* The element count is maintained using a LongAdder, which avoids |
356 |
|
|
* contention on updates but can encounter cache thrashing if read |
357 |
|
|
* too frequently during concurrent access. To avoid reading so |
358 |
|
|
* often, resizing is attempted either when a bin lock is |
359 |
|
|
* contended, or upon adding to a bin already holding two or more |
360 |
|
|
* nodes (checked before adding in the xIfAbsent methods, after |
361 |
|
|
* adding in others). Under uniform hash distributions, the |
362 |
|
|
* probability of this occurring at threshold is around 13%, |
363 |
|
|
* meaning that only about 1 in 8 puts check threshold (and after |
364 |
|
|
* resizing, many fewer do so). But this approximation has high |
365 |
|
|
* variance for small table sizes, so we check on any collision |
366 |
|
|
* for sizes <= 64. The bulk putAll operation further reduces |
367 |
|
|
* contention by only committing count updates upon these size |
368 |
|
|
* checks. |
369 |
|
|
* |
370 |
|
|
* Maintaining API and serialization compatibility with previous |
371 |
|
|
* versions of this class introduces several oddities. Mainly: We |
372 |
|
|
* leave untouched but unused constructor arguments refering to |
373 |
|
|
* concurrencyLevel. We accept a loadFactor constructor argument, |
374 |
|
|
* but apply it only to initial table capacity (which is the only |
375 |
|
|
* time that we can guarantee to honor it.) We also declare an |
376 |
|
|
* unused "Segment" class that is instantiated in minimal form |
377 |
|
|
* only when serializing. |
378 |
dl |
1.4 |
*/ |
379 |
tim |
1.1 |
|
380 |
dl |
1.4 |
/* ---------------- Constants -------------- */ |
381 |
tim |
1.11 |
|
382 |
dl |
1.4 |
/** |
383 |
dl |
1.119 |
* The largest possible table capacity. This value must be |
384 |
|
|
* exactly 1<<30 to stay within Java array allocation and indexing |
385 |
|
|
* bounds for power of two table sizes, and is further required |
386 |
|
|
* because the top two bits of 32bit hash fields are used for |
387 |
|
|
* control purposes. |
388 |
dl |
1.4 |
*/ |
389 |
dl |
1.119 |
private static final int MAXIMUM_CAPACITY = 1 << 30; |
390 |
dl |
1.56 |
|
391 |
|
|
/** |
392 |
dl |
1.119 |
* The default initial table capacity. Must be a power of 2 |
393 |
|
|
* (i.e., at least 1) and at most MAXIMUM_CAPACITY. |
394 |
dl |
1.56 |
*/ |
395 |
dl |
1.119 |
private static final int DEFAULT_CAPACITY = 16; |
396 |
dl |
1.56 |
|
397 |
|
|
/** |
398 |
dl |
1.119 |
* The largest possible (non-power of two) array size. |
399 |
|
|
* Needed by toArray and related methods. |
400 |
jsr166 |
1.59 |
*/ |
401 |
dl |
1.119 |
static final int MAX_ARRAY_SIZE = Integer.MAX_VALUE - 8; |
402 |
tim |
1.1 |
|
403 |
|
|
/** |
404 |
dl |
1.119 |
* The default concurrency level for this table. Unused but |
405 |
|
|
* defined for compatibility with previous versions of this class. |
406 |
dl |
1.4 |
*/ |
407 |
dl |
1.119 |
private static final int DEFAULT_CONCURRENCY_LEVEL = 16; |
408 |
tim |
1.11 |
|
409 |
tim |
1.1 |
/** |
410 |
dl |
1.119 |
* The load factor for this table. Overrides of this value in |
411 |
|
|
* constructors affect only the initial table capacity. The |
412 |
|
|
* actual floating point value isn't normally used -- it is |
413 |
|
|
* simpler to use expressions such as {@code n - (n >>> 2)} for |
414 |
|
|
* the associated resizing threshold. |
415 |
dl |
1.99 |
*/ |
416 |
dl |
1.119 |
private static final float LOAD_FACTOR = 0.75f; |
417 |
dl |
1.99 |
|
418 |
|
|
/** |
419 |
dl |
1.119 |
* 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 |
dl |
1.21 |
*/ |
423 |
dl |
1.119 |
private static final int TRANSFER_BUFFER_SIZE = 32; |
424 |
dl |
1.21 |
|
425 |
dl |
1.46 |
/** |
426 |
dl |
1.119 |
* The bin count threshold for using a tree rather than list for a |
427 |
|
|
* bin. The value reflects the approximate break-even point for |
428 |
|
|
* using tree-based operations. |
429 |
|
|
*/ |
430 |
|
|
private static final int TREE_THRESHOLD = 8; |
431 |
|
|
|
432 |
|
|
/* |
433 |
|
|
* Encodings for special uses of Node hash fields. See above for |
434 |
|
|
* explanation. |
435 |
dl |
1.46 |
*/ |
436 |
dl |
1.119 |
static final int MOVED = 0x80000000; // hash field for forwarding nodes |
437 |
|
|
static final int LOCKED = 0x40000000; // set/tested only as a bit |
438 |
|
|
static final int WAITING = 0xc0000000; // both bits set/tested together |
439 |
|
|
static final int HASH_BITS = 0x3fffffff; // usable bits of normal node hash |
440 |
dl |
1.46 |
|
441 |
dl |
1.4 |
/* ---------------- Fields -------------- */ |
442 |
tim |
1.1 |
|
443 |
|
|
/** |
444 |
dl |
1.119 |
* The array of bins. Lazily initialized upon first insertion. |
445 |
|
|
* Size is always a power of two. Accessed directly by iterators. |
446 |
jsr166 |
1.59 |
*/ |
447 |
dl |
1.119 |
transient volatile Node[] table; |
448 |
tim |
1.1 |
|
449 |
|
|
/** |
450 |
dl |
1.119 |
* The counter maintaining number of elements. |
451 |
jsr166 |
1.59 |
*/ |
452 |
dl |
1.119 |
private transient final LongAdder counter; |
453 |
tim |
1.1 |
|
454 |
|
|
/** |
455 |
dl |
1.119 |
* Table initialization and resizing control. When negative, the |
456 |
|
|
* table is being initialized or resized. Otherwise, when table is |
457 |
|
|
* null, holds the initial table size to use upon creation, or 0 |
458 |
|
|
* for default. After initialization, holds the next element count |
459 |
|
|
* value upon which to resize the table. |
460 |
tim |
1.1 |
*/ |
461 |
dl |
1.119 |
private transient volatile int sizeCtl; |
462 |
dl |
1.4 |
|
463 |
dl |
1.119 |
// views |
464 |
|
|
private transient KeySet<K,V> keySet; |
465 |
|
|
private transient Values<K,V> values; |
466 |
|
|
private transient EntrySet<K,V> entrySet; |
467 |
|
|
|
468 |
|
|
/** For serialization compatibility. Null unless serialized; see below */ |
469 |
|
|
private Segment<K,V>[] segments; |
470 |
|
|
|
471 |
|
|
/* ---------------- Table element access -------------- */ |
472 |
|
|
|
473 |
|
|
/* |
474 |
|
|
* Volatile access methods are used for table elements as well as |
475 |
|
|
* elements of in-progress next table while resizing. Uses are |
476 |
|
|
* null checked by callers, and implicitly bounds-checked, relying |
477 |
|
|
* on the invariants that tab arrays have non-zero size, and all |
478 |
|
|
* indices are masked with (tab.length - 1) which is never |
479 |
|
|
* negative and always less than length. Note that, to be correct |
480 |
|
|
* wrt arbitrary concurrency errors by users, bounds checks must |
481 |
|
|
* operate on local variables, which accounts for some odd-looking |
482 |
|
|
* inline assignments below. |
483 |
|
|
*/ |
484 |
|
|
|
485 |
|
|
static final Node tabAt(Node[] tab, int i) { // used by Iter |
486 |
|
|
return (Node)UNSAFE.getObjectVolatile(tab, ((long)i<<ASHIFT)+ABASE); |
487 |
|
|
} |
488 |
|
|
|
489 |
|
|
private static final boolean casTabAt(Node[] tab, int i, Node c, Node v) { |
490 |
|
|
return UNSAFE.compareAndSwapObject(tab, ((long)i<<ASHIFT)+ABASE, c, v); |
491 |
|
|
} |
492 |
|
|
|
493 |
|
|
private static final void setTabAt(Node[] tab, int i, Node v) { |
494 |
|
|
UNSAFE.putObjectVolatile(tab, ((long)i<<ASHIFT)+ABASE, v); |
495 |
|
|
} |
496 |
|
|
|
497 |
|
|
/* ---------------- Nodes -------------- */ |
498 |
dl |
1.4 |
|
499 |
dl |
1.99 |
/** |
500 |
dl |
1.119 |
* Key-value entry. Note that this is never exported out as a |
501 |
|
|
* user-visible Map.Entry (see MapEntry below). Nodes with a hash |
502 |
|
|
* field of MOVED are special, and do not contain user keys or |
503 |
|
|
* values. Otherwise, keys are never null, and null val fields |
504 |
|
|
* indicate that a node is in the process of being deleted or |
505 |
|
|
* created. For purposes of read-only access, a key may be read |
506 |
|
|
* before a val, but can only be used after checking val to be |
507 |
|
|
* non-null. |
508 |
dl |
1.99 |
*/ |
509 |
dl |
1.119 |
static class Node { |
510 |
|
|
volatile int hash; |
511 |
|
|
final Object key; |
512 |
|
|
volatile Object val; |
513 |
|
|
volatile Node next; |
514 |
dl |
1.99 |
|
515 |
dl |
1.119 |
Node(int hash, Object key, Object val, Node next) { |
516 |
dl |
1.99 |
this.hash = hash; |
517 |
|
|
this.key = key; |
518 |
dl |
1.119 |
this.val = val; |
519 |
dl |
1.99 |
this.next = next; |
520 |
|
|
} |
521 |
|
|
|
522 |
dl |
1.119 |
/** 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 |
dl |
1.99 |
/** |
532 |
dl |
1.119 |
* 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 |
dl |
1.99 |
*/ |
544 |
dl |
1.119 |
final void tryAwaitLock(Node[] tab, int i) { |
545 |
|
|
if (tab != null && i >= 0 && i < tab.length) { // bounds check |
546 |
|
|
int r = ThreadLocalRandom.current().nextInt(); // randomize spins |
547 |
|
|
int spins = MAX_SPINS, h; |
548 |
|
|
while (tabAt(tab, i) == this && ((h = hash) & LOCKED) != 0) { |
549 |
|
|
if (spins >= 0) { |
550 |
|
|
r ^= r << 1; r ^= r >>> 3; r ^= r << 10; // xorshift |
551 |
|
|
if (r >= 0 && --spins == 0) |
552 |
|
|
Thread.yield(); // yield before block |
553 |
|
|
} |
554 |
|
|
else if (casHash(h, h | WAITING)) { |
555 |
|
|
synchronized (this) { |
556 |
|
|
if (tabAt(tab, i) == this && |
557 |
|
|
(hash & WAITING) == WAITING) { |
558 |
|
|
try { |
559 |
|
|
wait(); |
560 |
|
|
} catch (InterruptedException ie) { |
561 |
|
|
Thread.currentThread().interrupt(); |
562 |
|
|
} |
563 |
|
|
} |
564 |
|
|
else |
565 |
|
|
notifyAll(); // possibly won race vs signaller |
566 |
|
|
} |
567 |
|
|
break; |
568 |
|
|
} |
569 |
|
|
} |
570 |
|
|
} |
571 |
dl |
1.99 |
} |
572 |
|
|
|
573 |
dl |
1.119 |
// Unsafe mechanics for casHash |
574 |
|
|
private static final sun.misc.Unsafe UNSAFE; |
575 |
|
|
private static final long hashOffset; |
576 |
|
|
|
577 |
dl |
1.99 |
static { |
578 |
|
|
try { |
579 |
|
|
UNSAFE = sun.misc.Unsafe.getUnsafe(); |
580 |
dl |
1.119 |
Class<?> k = Node.class; |
581 |
|
|
hashOffset = UNSAFE.objectFieldOffset |
582 |
|
|
(k.getDeclaredField("hash")); |
583 |
dl |
1.99 |
} catch (Exception e) { |
584 |
|
|
throw new Error(e); |
585 |
|
|
} |
586 |
|
|
} |
587 |
|
|
} |
588 |
|
|
|
589 |
dl |
1.119 |
/* ---------------- TreeBins -------------- */ |
590 |
|
|
|
591 |
dl |
1.99 |
/** |
592 |
dl |
1.119 |
* Nodes for use in TreeBins |
593 |
dl |
1.99 |
*/ |
594 |
dl |
1.119 |
static final class TreeNode extends Node { |
595 |
|
|
TreeNode parent; // red-black tree links |
596 |
|
|
TreeNode left; |
597 |
|
|
TreeNode right; |
598 |
|
|
TreeNode prev; // needed to unlink next upon deletion |
599 |
|
|
boolean red; |
600 |
dl |
1.99 |
|
601 |
dl |
1.119 |
TreeNode(int hash, Object key, Object val, Node next, TreeNode parent) { |
602 |
|
|
super(hash, key, val, next); |
603 |
|
|
this.parent = parent; |
604 |
|
|
} |
605 |
dl |
1.99 |
} |
606 |
tim |
1.1 |
|
607 |
|
|
/** |
608 |
dl |
1.119 |
* A specialized form of red-black tree for use in bins |
609 |
|
|
* whose size exceeds a threshold. |
610 |
|
|
* |
611 |
|
|
* TreeBins use a special form of comparison for search and |
612 |
|
|
* related operations (which is the main reason we cannot use |
613 |
|
|
* existing collections such as TreeMaps). TreeBins contain |
614 |
|
|
* Comparable elements, but may contain others, as well as |
615 |
|
|
* elements that are Comparable but not necessarily Comparable<T> |
616 |
|
|
* for the same T, so we cannot invoke compareTo among them. To |
617 |
|
|
* handle this, the tree is ordered primarily by hash value, then |
618 |
|
|
* by getClass().getName() order, and then by Comparator order |
619 |
|
|
* among elements of the same class. On lookup at a node, if |
620 |
|
|
* elements are not comparable or compare as 0, both left and |
621 |
|
|
* right children may need to be searched in the case of tied hash |
622 |
|
|
* values. (This corresponds to the full list search that would be |
623 |
|
|
* necessary if all elements were non-Comparable and had tied |
624 |
|
|
* hashes.) The red-black balancing code is updated from |
625 |
|
|
* pre-jdk-collections |
626 |
|
|
* (http://gee.cs.oswego.edu/dl/classes/collections/RBCell.java) |
627 |
|
|
* based in turn on Cormen, Leiserson, and Rivest "Introduction to |
628 |
|
|
* Algorithms" (CLR). |
629 |
|
|
* |
630 |
|
|
* TreeBins also maintain a separate locking discipline than |
631 |
|
|
* regular bins. Because they are forwarded via special MOVED |
632 |
|
|
* nodes at bin heads (which can never change once established), |
633 |
|
|
* we cannot use those nodes as locks. Instead, TreeBin |
634 |
|
|
* extends AbstractQueuedSynchronizer to support a simple form of |
635 |
|
|
* read-write lock. For update operations and table validation, |
636 |
|
|
* the exclusive form of lock behaves in the same way as bin-head |
637 |
|
|
* locks. However, lookups use shared read-lock mechanics to allow |
638 |
|
|
* multiple readers in the absence of writers. Additionally, |
639 |
|
|
* these lookups do not ever block: While the lock is not |
640 |
|
|
* available, they proceed along the slow traversal path (via |
641 |
|
|
* next-pointers) until the lock becomes available or the list is |
642 |
|
|
* exhausted, whichever comes first. (These cases are not fast, |
643 |
|
|
* but maximize aggregate expected throughput.) The AQS mechanics |
644 |
|
|
* for doing this are straightforward. The lock state is held as |
645 |
|
|
* AQS getState(). Read counts are negative; the write count (1) |
646 |
|
|
* is positive. There are no signalling preferences among readers |
647 |
|
|
* and writers. Since we don't need to export full Lock API, we |
648 |
|
|
* just override the minimal AQS methods and use them directly. |
649 |
|
|
*/ |
650 |
|
|
static final class TreeBin extends AbstractQueuedSynchronizer { |
651 |
dl |
1.24 |
private static final long serialVersionUID = 2249069246763182397L; |
652 |
dl |
1.119 |
transient TreeNode root; // root of tree |
653 |
|
|
transient TreeNode first; // head of next-pointer list |
654 |
dl |
1.24 |
|
655 |
dl |
1.119 |
/* AQS overrides */ |
656 |
|
|
public final boolean isHeldExclusively() { return getState() > 0; } |
657 |
|
|
public final boolean tryAcquire(int ignore) { |
658 |
|
|
if (compareAndSetState(0, 1)) { |
659 |
|
|
setExclusiveOwnerThread(Thread.currentThread()); |
660 |
|
|
return true; |
661 |
|
|
} |
662 |
|
|
return false; |
663 |
|
|
} |
664 |
|
|
public final boolean tryRelease(int ignore) { |
665 |
|
|
setExclusiveOwnerThread(null); |
666 |
|
|
setState(0); |
667 |
|
|
return true; |
668 |
|
|
} |
669 |
|
|
public final int tryAcquireShared(int ignore) { |
670 |
|
|
for (int c;;) { |
671 |
|
|
if ((c = getState()) > 0) |
672 |
|
|
return -1; |
673 |
|
|
if (compareAndSetState(c, c -1)) |
674 |
|
|
return 1; |
675 |
|
|
} |
676 |
|
|
} |
677 |
|
|
public final boolean tryReleaseShared(int ignore) { |
678 |
|
|
int c; |
679 |
|
|
do {} while (!compareAndSetState(c = getState(), c + 1)); |
680 |
|
|
return c == -1; |
681 |
|
|
} |
682 |
|
|
|
683 |
|
|
/** From CLR */ |
684 |
|
|
private void rotateLeft(TreeNode p) { |
685 |
|
|
if (p != null) { |
686 |
|
|
TreeNode r = p.right, pp, rl; |
687 |
|
|
if ((rl = p.right = r.left) != null) |
688 |
|
|
rl.parent = p; |
689 |
|
|
if ((pp = r.parent = p.parent) == null) |
690 |
|
|
root = r; |
691 |
|
|
else if (pp.left == p) |
692 |
|
|
pp.left = r; |
693 |
|
|
else |
694 |
|
|
pp.right = r; |
695 |
|
|
r.left = p; |
696 |
|
|
p.parent = r; |
697 |
|
|
} |
698 |
|
|
} |
699 |
dl |
1.4 |
|
700 |
dl |
1.119 |
/** From CLR */ |
701 |
|
|
private void rotateRight(TreeNode p) { |
702 |
|
|
if (p != null) { |
703 |
|
|
TreeNode l = p.left, pp, lr; |
704 |
|
|
if ((lr = p.left = l.right) != null) |
705 |
|
|
lr.parent = p; |
706 |
|
|
if ((pp = l.parent = p.parent) == null) |
707 |
|
|
root = l; |
708 |
|
|
else if (pp.right == p) |
709 |
|
|
pp.right = l; |
710 |
|
|
else |
711 |
|
|
pp.left = l; |
712 |
|
|
l.right = p; |
713 |
|
|
p.parent = l; |
714 |
|
|
} |
715 |
|
|
} |
716 |
dl |
1.4 |
|
717 |
|
|
/** |
718 |
jsr166 |
1.123 |
* Returns the TreeNode (or null if not found) for the given key |
719 |
dl |
1.119 |
* starting at given root. |
720 |
dl |
1.4 |
*/ |
721 |
dl |
1.119 |
@SuppressWarnings("unchecked") // suppress Comparable cast warning |
722 |
dl |
1.126 |
final TreeNode getTreeNode(int h, Object k, TreeNode p) { |
723 |
dl |
1.119 |
Class<?> c = k.getClass(); |
724 |
|
|
while (p != null) { |
725 |
|
|
int dir, ph; Object pk; Class<?> pc; |
726 |
|
|
if ((ph = p.hash) == h) { |
727 |
|
|
if ((pk = p.key) == k || k.equals(pk)) |
728 |
|
|
return p; |
729 |
|
|
if (c != (pc = pk.getClass()) || |
730 |
|
|
!(k instanceof Comparable) || |
731 |
|
|
(dir = ((Comparable)k).compareTo((Comparable)pk)) == 0) { |
732 |
|
|
dir = (c == pc) ? 0 : c.getName().compareTo(pc.getName()); |
733 |
|
|
TreeNode r = null, s = null, pl, pr; |
734 |
|
|
if (dir >= 0) { |
735 |
|
|
if ((pl = p.left) != null && h <= pl.hash) |
736 |
|
|
s = pl; |
737 |
dl |
1.99 |
} |
738 |
dl |
1.119 |
else if ((pr = p.right) != null && h >= pr.hash) |
739 |
|
|
s = pr; |
740 |
|
|
if (s != null && (r = getTreeNode(h, k, s)) != null) |
741 |
|
|
return r; |
742 |
dl |
1.45 |
} |
743 |
|
|
} |
744 |
dl |
1.119 |
else |
745 |
|
|
dir = (h < ph) ? -1 : 1; |
746 |
|
|
p = (dir > 0) ? p.right : p.left; |
747 |
dl |
1.33 |
} |
748 |
dl |
1.119 |
return null; |
749 |
dl |
1.33 |
} |
750 |
|
|
|
751 |
dl |
1.99 |
/** |
752 |
dl |
1.119 |
* Wrapper for getTreeNode used by CHM.get. Tries to obtain |
753 |
|
|
* read-lock to call getTreeNode, but during failure to get |
754 |
|
|
* lock, searches along next links. |
755 |
dl |
1.99 |
*/ |
756 |
dl |
1.119 |
final Object getValue(int h, Object k) { |
757 |
|
|
Node r = null; |
758 |
|
|
int c = getState(); // Must read lock state first |
759 |
|
|
for (Node e = first; e != null; e = e.next) { |
760 |
|
|
if (c <= 0 && compareAndSetState(c, c - 1)) { |
761 |
|
|
try { |
762 |
|
|
r = getTreeNode(h, k, root); |
763 |
|
|
} finally { |
764 |
|
|
releaseShared(0); |
765 |
dl |
1.99 |
} |
766 |
|
|
break; |
767 |
|
|
} |
768 |
dl |
1.119 |
else if ((e.hash & HASH_BITS) == h && k.equals(e.key)) { |
769 |
|
|
r = e; |
770 |
dl |
1.99 |
break; |
771 |
|
|
} |
772 |
dl |
1.119 |
else |
773 |
|
|
c = getState(); |
774 |
dl |
1.99 |
} |
775 |
dl |
1.119 |
return r == null ? null : r.val; |
776 |
dl |
1.99 |
} |
777 |
|
|
|
778 |
|
|
/** |
779 |
dl |
1.119 |
* Finds or adds a node. |
780 |
|
|
* @return null if added |
781 |
dl |
1.6 |
*/ |
782 |
dl |
1.119 |
@SuppressWarnings("unchecked") // suppress Comparable cast warning |
783 |
dl |
1.126 |
final TreeNode putTreeNode(int h, Object k, Object v) { |
784 |
dl |
1.119 |
Class<?> c = k.getClass(); |
785 |
|
|
TreeNode pp = root, p = null; |
786 |
|
|
int dir = 0; |
787 |
|
|
while (pp != null) { // find existing node or leaf to insert at |
788 |
|
|
int ph; Object pk; Class<?> pc; |
789 |
|
|
p = pp; |
790 |
|
|
if ((ph = p.hash) == h) { |
791 |
|
|
if ((pk = p.key) == k || k.equals(pk)) |
792 |
|
|
return p; |
793 |
|
|
if (c != (pc = pk.getClass()) || |
794 |
|
|
!(k instanceof Comparable) || |
795 |
|
|
(dir = ((Comparable)k).compareTo((Comparable)pk)) == 0) { |
796 |
|
|
dir = (c == pc) ? 0 : c.getName().compareTo(pc.getName()); |
797 |
|
|
TreeNode r = null, s = null, pl, pr; |
798 |
|
|
if (dir >= 0) { |
799 |
|
|
if ((pl = p.left) != null && h <= pl.hash) |
800 |
|
|
s = pl; |
801 |
dl |
1.99 |
} |
802 |
dl |
1.119 |
else if ((pr = p.right) != null && h >= pr.hash) |
803 |
|
|
s = pr; |
804 |
|
|
if (s != null && (r = getTreeNode(h, k, s)) != null) |
805 |
|
|
return r; |
806 |
dl |
1.99 |
} |
807 |
|
|
} |
808 |
dl |
1.119 |
else |
809 |
|
|
dir = (h < ph) ? -1 : 1; |
810 |
|
|
pp = (dir > 0) ? p.right : p.left; |
811 |
dl |
1.99 |
} |
812 |
|
|
|
813 |
dl |
1.119 |
TreeNode f = first; |
814 |
|
|
TreeNode x = first = new TreeNode(h, k, v, f, p); |
815 |
|
|
if (p == null) |
816 |
|
|
root = x; |
817 |
|
|
else { // attach and rebalance; adapted from CLR |
818 |
|
|
TreeNode xp, xpp; |
819 |
|
|
if (f != null) |
820 |
|
|
f.prev = x; |
821 |
|
|
if (dir <= 0) |
822 |
|
|
p.left = x; |
823 |
|
|
else |
824 |
|
|
p.right = x; |
825 |
|
|
x.red = true; |
826 |
|
|
while (x != null && (xp = x.parent) != null && xp.red && |
827 |
|
|
(xpp = xp.parent) != null) { |
828 |
|
|
TreeNode xppl = xpp.left; |
829 |
|
|
if (xp == xppl) { |
830 |
|
|
TreeNode y = xpp.right; |
831 |
|
|
if (y != null && y.red) { |
832 |
|
|
y.red = false; |
833 |
|
|
xp.red = false; |
834 |
|
|
xpp.red = true; |
835 |
|
|
x = xpp; |
836 |
|
|
} |
837 |
|
|
else { |
838 |
|
|
if (x == xp.right) { |
839 |
|
|
rotateLeft(x = xp); |
840 |
|
|
xpp = (xp = x.parent) == null ? null : xp.parent; |
841 |
|
|
} |
842 |
|
|
if (xp != null) { |
843 |
|
|
xp.red = false; |
844 |
|
|
if (xpp != null) { |
845 |
|
|
xpp.red = true; |
846 |
|
|
rotateRight(xpp); |
847 |
|
|
} |
848 |
|
|
} |
849 |
|
|
} |
850 |
|
|
} |
851 |
|
|
else { |
852 |
|
|
TreeNode y = xppl; |
853 |
|
|
if (y != null && y.red) { |
854 |
|
|
y.red = false; |
855 |
|
|
xp.red = false; |
856 |
|
|
xpp.red = true; |
857 |
|
|
x = xpp; |
858 |
|
|
} |
859 |
|
|
else { |
860 |
|
|
if (x == xp.left) { |
861 |
|
|
rotateRight(x = xp); |
862 |
|
|
xpp = (xp = x.parent) == null ? null : xp.parent; |
863 |
|
|
} |
864 |
|
|
if (xp != null) { |
865 |
|
|
xp.red = false; |
866 |
|
|
if (xpp != null) { |
867 |
|
|
xpp.red = true; |
868 |
|
|
rotateLeft(xpp); |
869 |
|
|
} |
870 |
|
|
} |
871 |
dl |
1.99 |
} |
872 |
|
|
} |
873 |
|
|
} |
874 |
dl |
1.119 |
TreeNode r = root; |
875 |
|
|
if (r != null && r.red) |
876 |
|
|
r.red = false; |
877 |
dl |
1.99 |
} |
878 |
dl |
1.119 |
return null; |
879 |
dl |
1.99 |
} |
880 |
dl |
1.45 |
|
881 |
dl |
1.119 |
/** |
882 |
|
|
* Removes the given node, that must be present before this |
883 |
|
|
* call. This is messier than typical red-black deletion code |
884 |
|
|
* because we cannot swap the contents of an interior node |
885 |
|
|
* with a leaf successor that is pinned by "next" pointers |
886 |
|
|
* that are accessible independently of lock. So instead we |
887 |
|
|
* swap the tree linkages. |
888 |
|
|
*/ |
889 |
|
|
final void deleteTreeNode(TreeNode p) { |
890 |
|
|
TreeNode next = (TreeNode)p.next; // unlink traversal pointers |
891 |
|
|
TreeNode pred = p.prev; |
892 |
|
|
if (pred == null) |
893 |
|
|
first = next; |
894 |
|
|
else |
895 |
|
|
pred.next = next; |
896 |
|
|
if (next != null) |
897 |
|
|
next.prev = pred; |
898 |
|
|
TreeNode replacement; |
899 |
|
|
TreeNode pl = p.left; |
900 |
|
|
TreeNode pr = p.right; |
901 |
|
|
if (pl != null && pr != null) { |
902 |
|
|
TreeNode s = pr, sl; |
903 |
|
|
while ((sl = s.left) != null) // find successor |
904 |
|
|
s = sl; |
905 |
|
|
boolean c = s.red; s.red = p.red; p.red = c; // swap colors |
906 |
|
|
TreeNode sr = s.right; |
907 |
|
|
TreeNode pp = p.parent; |
908 |
|
|
if (s == pr) { // p was s's direct parent |
909 |
|
|
p.parent = s; |
910 |
|
|
s.right = p; |
911 |
|
|
} |
912 |
|
|
else { |
913 |
|
|
TreeNode sp = s.parent; |
914 |
|
|
if ((p.parent = sp) != null) { |
915 |
|
|
if (s == sp.left) |
916 |
|
|
sp.left = p; |
917 |
|
|
else |
918 |
|
|
sp.right = p; |
919 |
dl |
1.45 |
} |
920 |
dl |
1.119 |
if ((s.right = pr) != null) |
921 |
|
|
pr.parent = s; |
922 |
dl |
1.4 |
} |
923 |
dl |
1.119 |
p.left = null; |
924 |
|
|
if ((p.right = sr) != null) |
925 |
|
|
sr.parent = p; |
926 |
|
|
if ((s.left = pl) != null) |
927 |
|
|
pl.parent = s; |
928 |
|
|
if ((s.parent = pp) == null) |
929 |
|
|
root = s; |
930 |
|
|
else if (p == pp.left) |
931 |
|
|
pp.left = s; |
932 |
|
|
else |
933 |
|
|
pp.right = s; |
934 |
|
|
replacement = sr; |
935 |
|
|
} |
936 |
|
|
else |
937 |
|
|
replacement = (pl != null) ? pl : pr; |
938 |
|
|
TreeNode pp = p.parent; |
939 |
|
|
if (replacement == null) { |
940 |
|
|
if (pp == null) { |
941 |
|
|
root = null; |
942 |
|
|
return; |
943 |
|
|
} |
944 |
|
|
replacement = p; |
945 |
dl |
1.99 |
} |
946 |
dl |
1.119 |
else { |
947 |
|
|
replacement.parent = pp; |
948 |
|
|
if (pp == null) |
949 |
|
|
root = replacement; |
950 |
|
|
else if (p == pp.left) |
951 |
|
|
pp.left = replacement; |
952 |
|
|
else |
953 |
|
|
pp.right = replacement; |
954 |
|
|
p.left = p.right = p.parent = null; |
955 |
dl |
1.4 |
} |
956 |
dl |
1.119 |
if (!p.red) { // rebalance, from CLR |
957 |
|
|
TreeNode x = replacement; |
958 |
|
|
while (x != null) { |
959 |
|
|
TreeNode xp, xpl; |
960 |
|
|
if (x.red || (xp = x.parent) == null) { |
961 |
|
|
x.red = false; |
962 |
dl |
1.99 |
break; |
963 |
dl |
1.119 |
} |
964 |
|
|
if (x == (xpl = xp.left)) { |
965 |
|
|
TreeNode sib = xp.right; |
966 |
|
|
if (sib != null && sib.red) { |
967 |
|
|
sib.red = false; |
968 |
|
|
xp.red = true; |
969 |
|
|
rotateLeft(xp); |
970 |
|
|
sib = (xp = x.parent) == null ? null : xp.right; |
971 |
|
|
} |
972 |
|
|
if (sib == null) |
973 |
|
|
x = xp; |
974 |
|
|
else { |
975 |
|
|
TreeNode sl = sib.left, sr = sib.right; |
976 |
|
|
if ((sr == null || !sr.red) && |
977 |
|
|
(sl == null || !sl.red)) { |
978 |
|
|
sib.red = true; |
979 |
|
|
x = xp; |
980 |
|
|
} |
981 |
|
|
else { |
982 |
|
|
if (sr == null || !sr.red) { |
983 |
|
|
if (sl != null) |
984 |
|
|
sl.red = false; |
985 |
|
|
sib.red = true; |
986 |
|
|
rotateRight(sib); |
987 |
|
|
sib = (xp = x.parent) == null ? null : xp.right; |
988 |
|
|
} |
989 |
|
|
if (sib != null) { |
990 |
|
|
sib.red = (xp == null) ? false : xp.red; |
991 |
|
|
if ((sr = sib.right) != null) |
992 |
|
|
sr.red = false; |
993 |
|
|
} |
994 |
|
|
if (xp != null) { |
995 |
|
|
xp.red = false; |
996 |
|
|
rotateLeft(xp); |
997 |
|
|
} |
998 |
|
|
x = root; |
999 |
|
|
} |
1000 |
|
|
} |
1001 |
|
|
} |
1002 |
|
|
else { // symmetric |
1003 |
|
|
TreeNode sib = xpl; |
1004 |
|
|
if (sib != null && sib.red) { |
1005 |
|
|
sib.red = false; |
1006 |
|
|
xp.red = true; |
1007 |
|
|
rotateRight(xp); |
1008 |
|
|
sib = (xp = x.parent) == null ? null : xp.left; |
1009 |
|
|
} |
1010 |
|
|
if (sib == null) |
1011 |
|
|
x = xp; |
1012 |
|
|
else { |
1013 |
|
|
TreeNode sl = sib.left, sr = sib.right; |
1014 |
|
|
if ((sl == null || !sl.red) && |
1015 |
|
|
(sr == null || !sr.red)) { |
1016 |
|
|
sib.red = true; |
1017 |
|
|
x = xp; |
1018 |
|
|
} |
1019 |
|
|
else { |
1020 |
|
|
if (sl == null || !sl.red) { |
1021 |
|
|
if (sr != null) |
1022 |
|
|
sr.red = false; |
1023 |
|
|
sib.red = true; |
1024 |
|
|
rotateLeft(sib); |
1025 |
|
|
sib = (xp = x.parent) == null ? null : xp.left; |
1026 |
|
|
} |
1027 |
|
|
if (sib != null) { |
1028 |
|
|
sib.red = (xp == null) ? false : xp.red; |
1029 |
|
|
if ((sl = sib.left) != null) |
1030 |
|
|
sl.red = false; |
1031 |
|
|
} |
1032 |
|
|
if (xp != null) { |
1033 |
|
|
xp.red = false; |
1034 |
|
|
rotateRight(xp); |
1035 |
|
|
} |
1036 |
|
|
x = root; |
1037 |
|
|
} |
1038 |
|
|
} |
1039 |
|
|
} |
1040 |
dl |
1.45 |
} |
1041 |
dl |
1.4 |
} |
1042 |
dl |
1.119 |
if (p == replacement && (pp = p.parent) != null) { |
1043 |
|
|
if (p == pp.left) // detach pointers |
1044 |
|
|
pp.left = null; |
1045 |
|
|
else if (p == pp.right) |
1046 |
|
|
pp.right = null; |
1047 |
|
|
p.parent = null; |
1048 |
|
|
} |
1049 |
dl |
1.4 |
} |
1050 |
tim |
1.1 |
} |
1051 |
|
|
|
1052 |
dl |
1.119 |
/* ---------------- Collision reduction methods -------------- */ |
1053 |
tim |
1.1 |
|
1054 |
dl |
1.99 |
/** |
1055 |
dl |
1.119 |
* Spreads higher bits to lower, and also forces top 2 bits to 0. |
1056 |
|
|
* Because the table uses power-of-two masking, sets of hashes |
1057 |
|
|
* that vary only in bits above the current mask will always |
1058 |
|
|
* collide. (Among known examples are sets of Float keys holding |
1059 |
|
|
* consecutive whole numbers in small tables.) To counter this, |
1060 |
|
|
* we apply a transform that spreads the impact of higher bits |
1061 |
|
|
* downward. There is a tradeoff between speed, utility, and |
1062 |
|
|
* quality of bit-spreading. Because many common sets of hashes |
1063 |
|
|
* are already reasonably distributed across bits (so don't benefit |
1064 |
|
|
* from spreading), and because we use trees to handle large sets |
1065 |
|
|
* of collisions in bins, we don't need excessively high quality. |
1066 |
|
|
*/ |
1067 |
|
|
private static final int spread(int h) { |
1068 |
|
|
h ^= (h >>> 18) ^ (h >>> 12); |
1069 |
|
|
return (h ^ (h >>> 10)) & HASH_BITS; |
1070 |
dl |
1.99 |
} |
1071 |
|
|
|
1072 |
|
|
/** |
1073 |
dl |
1.119 |
* Replaces a list bin with a tree bin. Call only when locked. |
1074 |
|
|
* Fails to replace if the given key is non-comparable or table |
1075 |
|
|
* is, or needs, resizing. |
1076 |
|
|
*/ |
1077 |
|
|
private final void replaceWithTreeBin(Node[] tab, int index, Object key) { |
1078 |
|
|
if ((key instanceof Comparable) && |
1079 |
|
|
(tab.length >= MAXIMUM_CAPACITY || counter.sum() < (long)sizeCtl)) { |
1080 |
|
|
TreeBin t = new TreeBin(); |
1081 |
|
|
for (Node e = tabAt(tab, index); e != null; e = e.next) |
1082 |
|
|
t.putTreeNode(e.hash & HASH_BITS, e.key, e.val); |
1083 |
|
|
setTabAt(tab, index, new Node(MOVED, t, null, null)); |
1084 |
|
|
} |
1085 |
dl |
1.99 |
} |
1086 |
tim |
1.11 |
|
1087 |
dl |
1.119 |
/* ---------------- Internal access and update methods -------------- */ |
1088 |
|
|
|
1089 |
|
|
/** Implementation for get and containsKey */ |
1090 |
|
|
private final Object internalGet(Object k) { |
1091 |
|
|
int h = spread(k.hashCode()); |
1092 |
|
|
retry: for (Node[] tab = table; tab != null;) { |
1093 |
|
|
Node e, p; Object ek, ev; int eh; // locals to read fields once |
1094 |
|
|
for (e = tabAt(tab, (tab.length - 1) & h); e != null; e = e.next) { |
1095 |
|
|
if ((eh = e.hash) == MOVED) { |
1096 |
|
|
if ((ek = e.key) instanceof TreeBin) // search TreeBin |
1097 |
|
|
return ((TreeBin)ek).getValue(h, k); |
1098 |
|
|
else { // restart with new table |
1099 |
|
|
tab = (Node[])ek; |
1100 |
|
|
continue retry; |
1101 |
|
|
} |
1102 |
|
|
} |
1103 |
|
|
else if ((eh & HASH_BITS) == h && (ev = e.val) != null && |
1104 |
|
|
((ek = e.key) == k || k.equals(ek))) |
1105 |
|
|
return ev; |
1106 |
|
|
} |
1107 |
|
|
break; |
1108 |
|
|
} |
1109 |
|
|
return null; |
1110 |
tim |
1.1 |
} |
1111 |
|
|
|
1112 |
|
|
/** |
1113 |
dl |
1.119 |
* Implementation for the four public remove/replace methods: |
1114 |
|
|
* Replaces node value with v, conditional upon match of cv if |
1115 |
|
|
* non-null. If resulting value is null, delete. |
1116 |
|
|
*/ |
1117 |
|
|
private final Object internalReplace(Object k, Object v, Object cv) { |
1118 |
|
|
int h = spread(k.hashCode()); |
1119 |
|
|
Object oldVal = null; |
1120 |
|
|
for (Node[] tab = table;;) { |
1121 |
|
|
Node f; int i, fh; Object fk; |
1122 |
|
|
if (tab == null || |
1123 |
|
|
(f = tabAt(tab, i = (tab.length - 1) & h)) == null) |
1124 |
|
|
break; |
1125 |
|
|
else if ((fh = f.hash) == MOVED) { |
1126 |
|
|
if ((fk = f.key) instanceof TreeBin) { |
1127 |
|
|
TreeBin t = (TreeBin)fk; |
1128 |
|
|
boolean validated = false; |
1129 |
|
|
boolean deleted = false; |
1130 |
|
|
t.acquire(0); |
1131 |
|
|
try { |
1132 |
|
|
if (tabAt(tab, i) == f) { |
1133 |
|
|
validated = true; |
1134 |
|
|
TreeNode p = t.getTreeNode(h, k, t.root); |
1135 |
|
|
if (p != null) { |
1136 |
|
|
Object pv = p.val; |
1137 |
|
|
if (cv == null || cv == pv || cv.equals(pv)) { |
1138 |
|
|
oldVal = pv; |
1139 |
|
|
if ((p.val = v) == null) { |
1140 |
|
|
deleted = true; |
1141 |
|
|
t.deleteTreeNode(p); |
1142 |
|
|
} |
1143 |
|
|
} |
1144 |
|
|
} |
1145 |
|
|
} |
1146 |
|
|
} finally { |
1147 |
|
|
t.release(0); |
1148 |
|
|
} |
1149 |
|
|
if (validated) { |
1150 |
|
|
if (deleted) |
1151 |
|
|
counter.add(-1L); |
1152 |
|
|
break; |
1153 |
|
|
} |
1154 |
|
|
} |
1155 |
|
|
else |
1156 |
|
|
tab = (Node[])fk; |
1157 |
|
|
} |
1158 |
|
|
else if ((fh & HASH_BITS) != h && f.next == null) // precheck |
1159 |
|
|
break; // rules out possible existence |
1160 |
|
|
else if ((fh & LOCKED) != 0) { |
1161 |
|
|
checkForResize(); // try resizing if can't get lock |
1162 |
|
|
f.tryAwaitLock(tab, i); |
1163 |
|
|
} |
1164 |
|
|
else if (f.casHash(fh, fh | LOCKED)) { |
1165 |
|
|
boolean validated = false; |
1166 |
|
|
boolean deleted = false; |
1167 |
|
|
try { |
1168 |
|
|
if (tabAt(tab, i) == f) { |
1169 |
|
|
validated = true; |
1170 |
|
|
for (Node e = f, pred = null;;) { |
1171 |
|
|
Object ek, ev; |
1172 |
|
|
if ((e.hash & HASH_BITS) == h && |
1173 |
|
|
((ev = e.val) != null) && |
1174 |
|
|
((ek = e.key) == k || k.equals(ek))) { |
1175 |
|
|
if (cv == null || cv == ev || cv.equals(ev)) { |
1176 |
|
|
oldVal = ev; |
1177 |
|
|
if ((e.val = v) == null) { |
1178 |
|
|
deleted = true; |
1179 |
|
|
Node en = e.next; |
1180 |
|
|
if (pred != null) |
1181 |
|
|
pred.next = en; |
1182 |
|
|
else |
1183 |
|
|
setTabAt(tab, i, en); |
1184 |
|
|
} |
1185 |
|
|
} |
1186 |
|
|
break; |
1187 |
|
|
} |
1188 |
|
|
pred = e; |
1189 |
|
|
if ((e = e.next) == null) |
1190 |
|
|
break; |
1191 |
|
|
} |
1192 |
|
|
} |
1193 |
|
|
} finally { |
1194 |
|
|
if (!f.casHash(fh | LOCKED, fh)) { |
1195 |
|
|
f.hash = fh; |
1196 |
|
|
synchronized (f) { f.notifyAll(); }; |
1197 |
|
|
} |
1198 |
|
|
} |
1199 |
|
|
if (validated) { |
1200 |
|
|
if (deleted) |
1201 |
|
|
counter.add(-1L); |
1202 |
|
|
break; |
1203 |
|
|
} |
1204 |
|
|
} |
1205 |
|
|
} |
1206 |
|
|
return oldVal; |
1207 |
dl |
1.55 |
} |
1208 |
|
|
|
1209 |
dl |
1.119 |
/* |
1210 |
dl |
1.126 |
* Internal versions of the six insertion methods, each a |
1211 |
dl |
1.119 |
* little more complicated than the last. All have |
1212 |
|
|
* the same basic structure as the first (internalPut): |
1213 |
|
|
* 1. If table uninitialized, create |
1214 |
|
|
* 2. If bin empty, try to CAS new node |
1215 |
|
|
* 3. If bin stale, use new table |
1216 |
|
|
* 4. if bin converted to TreeBin, validate and relay to TreeBin methods |
1217 |
|
|
* 5. Lock and validate; if valid, scan and add or update |
1218 |
tim |
1.1 |
* |
1219 |
dl |
1.119 |
* The others interweave other checks and/or alternative actions: |
1220 |
|
|
* * Plain put checks for and performs resize after insertion. |
1221 |
|
|
* * putIfAbsent prescans for mapping without lock (and fails to add |
1222 |
|
|
* if present), which also makes pre-emptive resize checks worthwhile. |
1223 |
|
|
* * computeIfAbsent extends form used in putIfAbsent with additional |
1224 |
|
|
* mechanics to deal with, calls, potential exceptions and null |
1225 |
|
|
* returns from function call. |
1226 |
|
|
* * compute uses the same function-call mechanics, but without |
1227 |
|
|
* the prescans |
1228 |
dl |
1.126 |
* * merge acts as putIfAbsent in the absent case, but invokes the |
1229 |
|
|
* update function if present |
1230 |
dl |
1.119 |
* * putAll attempts to pre-allocate enough table space |
1231 |
|
|
* and more lazily performs count updates and checks. |
1232 |
jsr166 |
1.76 |
* |
1233 |
dl |
1.119 |
* Someday when details settle down a bit more, it might be worth |
1234 |
|
|
* some factoring to reduce sprawl. |
1235 |
tim |
1.1 |
*/ |
1236 |
|
|
|
1237 |
dl |
1.119 |
/** Implementation for put */ |
1238 |
|
|
private final Object internalPut(Object k, Object v) { |
1239 |
|
|
int h = spread(k.hashCode()); |
1240 |
|
|
int count = 0; |
1241 |
|
|
for (Node[] tab = table;;) { |
1242 |
|
|
int i; Node f; int fh; Object fk; |
1243 |
|
|
if (tab == null) |
1244 |
|
|
tab = initTable(); |
1245 |
|
|
else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) { |
1246 |
|
|
if (casTabAt(tab, i, null, new Node(h, k, v, null))) |
1247 |
|
|
break; // no lock when adding to empty bin |
1248 |
dl |
1.99 |
} |
1249 |
dl |
1.119 |
else if ((fh = f.hash) == MOVED) { |
1250 |
|
|
if ((fk = f.key) instanceof TreeBin) { |
1251 |
|
|
TreeBin t = (TreeBin)fk; |
1252 |
|
|
Object oldVal = null; |
1253 |
|
|
t.acquire(0); |
1254 |
|
|
try { |
1255 |
|
|
if (tabAt(tab, i) == f) { |
1256 |
|
|
count = 2; |
1257 |
|
|
TreeNode p = t.putTreeNode(h, k, v); |
1258 |
|
|
if (p != null) { |
1259 |
|
|
oldVal = p.val; |
1260 |
|
|
p.val = v; |
1261 |
|
|
} |
1262 |
|
|
} |
1263 |
|
|
} finally { |
1264 |
|
|
t.release(0); |
1265 |
|
|
} |
1266 |
|
|
if (count != 0) { |
1267 |
|
|
if (oldVal != null) |
1268 |
|
|
return oldVal; |
1269 |
|
|
break; |
1270 |
|
|
} |
1271 |
|
|
} |
1272 |
|
|
else |
1273 |
|
|
tab = (Node[])fk; |
1274 |
|
|
} |
1275 |
|
|
else if ((fh & LOCKED) != 0) { |
1276 |
|
|
checkForResize(); |
1277 |
|
|
f.tryAwaitLock(tab, i); |
1278 |
|
|
} |
1279 |
|
|
else if (f.casHash(fh, fh | LOCKED)) { |
1280 |
|
|
Object oldVal = null; |
1281 |
|
|
try { // needed in case equals() throws |
1282 |
|
|
if (tabAt(tab, i) == f) { |
1283 |
|
|
count = 1; |
1284 |
|
|
for (Node e = f;; ++count) { |
1285 |
|
|
Object ek, ev; |
1286 |
|
|
if ((e.hash & HASH_BITS) == h && |
1287 |
|
|
(ev = e.val) != null && |
1288 |
|
|
((ek = e.key) == k || k.equals(ek))) { |
1289 |
|
|
oldVal = ev; |
1290 |
|
|
e.val = v; |
1291 |
|
|
break; |
1292 |
|
|
} |
1293 |
|
|
Node last = e; |
1294 |
|
|
if ((e = e.next) == null) { |
1295 |
|
|
last.next = new Node(h, k, v, null); |
1296 |
|
|
if (count >= TREE_THRESHOLD) |
1297 |
|
|
replaceWithTreeBin(tab, i, k); |
1298 |
|
|
break; |
1299 |
|
|
} |
1300 |
|
|
} |
1301 |
|
|
} |
1302 |
|
|
} finally { // unlock and signal if needed |
1303 |
|
|
if (!f.casHash(fh | LOCKED, fh)) { |
1304 |
|
|
f.hash = fh; |
1305 |
|
|
synchronized (f) { f.notifyAll(); }; |
1306 |
|
|
} |
1307 |
|
|
} |
1308 |
|
|
if (count != 0) { |
1309 |
|
|
if (oldVal != null) |
1310 |
|
|
return oldVal; |
1311 |
|
|
if (tab.length <= 64) |
1312 |
|
|
count = 2; |
1313 |
|
|
break; |
1314 |
dl |
1.99 |
} |
1315 |
dl |
1.21 |
} |
1316 |
|
|
} |
1317 |
dl |
1.119 |
counter.add(1L); |
1318 |
|
|
if (count > 1) |
1319 |
|
|
checkForResize(); |
1320 |
|
|
return null; |
1321 |
tim |
1.1 |
} |
1322 |
|
|
|
1323 |
dl |
1.119 |
/** Implementation for putIfAbsent */ |
1324 |
|
|
private final Object internalPutIfAbsent(Object k, Object v) { |
1325 |
|
|
int h = spread(k.hashCode()); |
1326 |
|
|
int count = 0; |
1327 |
|
|
for (Node[] tab = table;;) { |
1328 |
|
|
int i; Node f; int fh; Object fk, fv; |
1329 |
|
|
if (tab == null) |
1330 |
|
|
tab = initTable(); |
1331 |
|
|
else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) { |
1332 |
|
|
if (casTabAt(tab, i, null, new Node(h, k, v, null))) |
1333 |
|
|
break; |
1334 |
|
|
} |
1335 |
|
|
else if ((fh = f.hash) == MOVED) { |
1336 |
|
|
if ((fk = f.key) instanceof TreeBin) { |
1337 |
|
|
TreeBin t = (TreeBin)fk; |
1338 |
|
|
Object oldVal = null; |
1339 |
|
|
t.acquire(0); |
1340 |
|
|
try { |
1341 |
|
|
if (tabAt(tab, i) == f) { |
1342 |
|
|
count = 2; |
1343 |
|
|
TreeNode p = t.putTreeNode(h, k, v); |
1344 |
|
|
if (p != null) |
1345 |
|
|
oldVal = p.val; |
1346 |
|
|
} |
1347 |
|
|
} finally { |
1348 |
|
|
t.release(0); |
1349 |
|
|
} |
1350 |
|
|
if (count != 0) { |
1351 |
|
|
if (oldVal != null) |
1352 |
|
|
return oldVal; |
1353 |
|
|
break; |
1354 |
|
|
} |
1355 |
|
|
} |
1356 |
|
|
else |
1357 |
|
|
tab = (Node[])fk; |
1358 |
|
|
} |
1359 |
|
|
else if ((fh & HASH_BITS) == h && (fv = f.val) != null && |
1360 |
|
|
((fk = f.key) == k || k.equals(fk))) |
1361 |
|
|
return fv; |
1362 |
|
|
else { |
1363 |
|
|
Node g = f.next; |
1364 |
|
|
if (g != null) { // at least 2 nodes -- search and maybe resize |
1365 |
|
|
for (Node e = g;;) { |
1366 |
|
|
Object ek, ev; |
1367 |
|
|
if ((e.hash & HASH_BITS) == h && (ev = e.val) != null && |
1368 |
|
|
((ek = e.key) == k || k.equals(ek))) |
1369 |
|
|
return ev; |
1370 |
|
|
if ((e = e.next) == null) { |
1371 |
|
|
checkForResize(); |
1372 |
|
|
break; |
1373 |
|
|
} |
1374 |
|
|
} |
1375 |
|
|
} |
1376 |
|
|
if (((fh = f.hash) & LOCKED) != 0) { |
1377 |
|
|
checkForResize(); |
1378 |
|
|
f.tryAwaitLock(tab, i); |
1379 |
|
|
} |
1380 |
|
|
else if (tabAt(tab, i) == f && f.casHash(fh, fh | LOCKED)) { |
1381 |
|
|
Object oldVal = null; |
1382 |
|
|
try { |
1383 |
|
|
if (tabAt(tab, i) == f) { |
1384 |
|
|
count = 1; |
1385 |
|
|
for (Node e = f;; ++count) { |
1386 |
|
|
Object ek, ev; |
1387 |
|
|
if ((e.hash & HASH_BITS) == h && |
1388 |
|
|
(ev = e.val) != null && |
1389 |
|
|
((ek = e.key) == k || k.equals(ek))) { |
1390 |
|
|
oldVal = ev; |
1391 |
|
|
break; |
1392 |
|
|
} |
1393 |
|
|
Node last = e; |
1394 |
|
|
if ((e = e.next) == null) { |
1395 |
|
|
last.next = new Node(h, k, v, null); |
1396 |
|
|
if (count >= TREE_THRESHOLD) |
1397 |
|
|
replaceWithTreeBin(tab, i, k); |
1398 |
|
|
break; |
1399 |
|
|
} |
1400 |
|
|
} |
1401 |
|
|
} |
1402 |
|
|
} finally { |
1403 |
|
|
if (!f.casHash(fh | LOCKED, fh)) { |
1404 |
|
|
f.hash = fh; |
1405 |
|
|
synchronized (f) { f.notifyAll(); }; |
1406 |
|
|
} |
1407 |
|
|
} |
1408 |
|
|
if (count != 0) { |
1409 |
|
|
if (oldVal != null) |
1410 |
|
|
return oldVal; |
1411 |
|
|
if (tab.length <= 64) |
1412 |
|
|
count = 2; |
1413 |
|
|
break; |
1414 |
|
|
} |
1415 |
|
|
} |
1416 |
|
|
} |
1417 |
dl |
1.45 |
} |
1418 |
dl |
1.119 |
counter.add(1L); |
1419 |
|
|
if (count > 1) |
1420 |
|
|
checkForResize(); |
1421 |
|
|
return null; |
1422 |
dl |
1.21 |
} |
1423 |
|
|
|
1424 |
dl |
1.119 |
/** Implementation for computeIfAbsent */ |
1425 |
|
|
private final Object internalComputeIfAbsent(K k, |
1426 |
|
|
Fun<? super K, ?> mf) { |
1427 |
|
|
int h = spread(k.hashCode()); |
1428 |
|
|
Object val = null; |
1429 |
|
|
int count = 0; |
1430 |
|
|
for (Node[] tab = table;;) { |
1431 |
|
|
Node f; int i, fh; Object fk, fv; |
1432 |
|
|
if (tab == null) |
1433 |
|
|
tab = initTable(); |
1434 |
|
|
else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) { |
1435 |
|
|
Node node = new Node(fh = h | LOCKED, k, null, null); |
1436 |
|
|
if (casTabAt(tab, i, null, node)) { |
1437 |
|
|
count = 1; |
1438 |
|
|
try { |
1439 |
|
|
if ((val = mf.apply(k)) != null) |
1440 |
|
|
node.val = val; |
1441 |
|
|
} finally { |
1442 |
|
|
if (val == null) |
1443 |
|
|
setTabAt(tab, i, null); |
1444 |
|
|
if (!node.casHash(fh, h)) { |
1445 |
|
|
node.hash = h; |
1446 |
|
|
synchronized (node) { node.notifyAll(); }; |
1447 |
|
|
} |
1448 |
|
|
} |
1449 |
|
|
} |
1450 |
|
|
if (count != 0) |
1451 |
|
|
break; |
1452 |
|
|
} |
1453 |
|
|
else if ((fh = f.hash) == MOVED) { |
1454 |
|
|
if ((fk = f.key) instanceof TreeBin) { |
1455 |
|
|
TreeBin t = (TreeBin)fk; |
1456 |
|
|
boolean added = false; |
1457 |
|
|
t.acquire(0); |
1458 |
|
|
try { |
1459 |
|
|
if (tabAt(tab, i) == f) { |
1460 |
|
|
count = 1; |
1461 |
|
|
TreeNode p = t.getTreeNode(h, k, t.root); |
1462 |
|
|
if (p != null) |
1463 |
|
|
val = p.val; |
1464 |
|
|
else if ((val = mf.apply(k)) != null) { |
1465 |
|
|
added = true; |
1466 |
|
|
count = 2; |
1467 |
|
|
t.putTreeNode(h, k, val); |
1468 |
|
|
} |
1469 |
|
|
} |
1470 |
|
|
} finally { |
1471 |
|
|
t.release(0); |
1472 |
|
|
} |
1473 |
|
|
if (count != 0) { |
1474 |
|
|
if (!added) |
1475 |
|
|
return val; |
1476 |
|
|
break; |
1477 |
|
|
} |
1478 |
|
|
} |
1479 |
|
|
else |
1480 |
|
|
tab = (Node[])fk; |
1481 |
|
|
} |
1482 |
|
|
else if ((fh & HASH_BITS) == h && (fv = f.val) != null && |
1483 |
|
|
((fk = f.key) == k || k.equals(fk))) |
1484 |
|
|
return fv; |
1485 |
|
|
else { |
1486 |
|
|
Node g = f.next; |
1487 |
|
|
if (g != null) { |
1488 |
|
|
for (Node e = g;;) { |
1489 |
|
|
Object ek, ev; |
1490 |
|
|
if ((e.hash & HASH_BITS) == h && (ev = e.val) != null && |
1491 |
|
|
((ek = e.key) == k || k.equals(ek))) |
1492 |
|
|
return ev; |
1493 |
|
|
if ((e = e.next) == null) { |
1494 |
|
|
checkForResize(); |
1495 |
|
|
break; |
1496 |
|
|
} |
1497 |
|
|
} |
1498 |
|
|
} |
1499 |
|
|
if (((fh = f.hash) & LOCKED) != 0) { |
1500 |
|
|
checkForResize(); |
1501 |
|
|
f.tryAwaitLock(tab, i); |
1502 |
|
|
} |
1503 |
|
|
else if (tabAt(tab, i) == f && f.casHash(fh, fh | LOCKED)) { |
1504 |
|
|
boolean added = false; |
1505 |
|
|
try { |
1506 |
|
|
if (tabAt(tab, i) == f) { |
1507 |
|
|
count = 1; |
1508 |
|
|
for (Node e = f;; ++count) { |
1509 |
|
|
Object ek, ev; |
1510 |
|
|
if ((e.hash & HASH_BITS) == h && |
1511 |
|
|
(ev = e.val) != null && |
1512 |
|
|
((ek = e.key) == k || k.equals(ek))) { |
1513 |
|
|
val = ev; |
1514 |
|
|
break; |
1515 |
|
|
} |
1516 |
|
|
Node last = e; |
1517 |
|
|
if ((e = e.next) == null) { |
1518 |
|
|
if ((val = mf.apply(k)) != null) { |
1519 |
|
|
added = true; |
1520 |
|
|
last.next = new Node(h, k, val, null); |
1521 |
|
|
if (count >= TREE_THRESHOLD) |
1522 |
|
|
replaceWithTreeBin(tab, i, k); |
1523 |
|
|
} |
1524 |
|
|
break; |
1525 |
|
|
} |
1526 |
|
|
} |
1527 |
|
|
} |
1528 |
|
|
} finally { |
1529 |
|
|
if (!f.casHash(fh | LOCKED, fh)) { |
1530 |
|
|
f.hash = fh; |
1531 |
|
|
synchronized (f) { f.notifyAll(); }; |
1532 |
|
|
} |
1533 |
|
|
} |
1534 |
|
|
if (count != 0) { |
1535 |
|
|
if (!added) |
1536 |
|
|
return val; |
1537 |
|
|
if (tab.length <= 64) |
1538 |
|
|
count = 2; |
1539 |
|
|
break; |
1540 |
|
|
} |
1541 |
|
|
} |
1542 |
dl |
1.105 |
} |
1543 |
dl |
1.99 |
} |
1544 |
dl |
1.119 |
if (val != null) { |
1545 |
|
|
counter.add(1L); |
1546 |
|
|
if (count > 1) |
1547 |
|
|
checkForResize(); |
1548 |
|
|
} |
1549 |
|
|
return val; |
1550 |
tim |
1.1 |
} |
1551 |
|
|
|
1552 |
dl |
1.119 |
/** Implementation for compute */ |
1553 |
dl |
1.105 |
@SuppressWarnings("unchecked") |
1554 |
dl |
1.126 |
private final Object internalCompute(K k, boolean onlyIfPresent, |
1555 |
dl |
1.119 |
BiFun<? super K, ? super V, ? extends V> mf) { |
1556 |
|
|
int h = spread(k.hashCode()); |
1557 |
|
|
Object val = null; |
1558 |
|
|
int delta = 0; |
1559 |
|
|
int count = 0; |
1560 |
|
|
for (Node[] tab = table;;) { |
1561 |
|
|
Node f; int i, fh; Object fk; |
1562 |
|
|
if (tab == null) |
1563 |
|
|
tab = initTable(); |
1564 |
|
|
else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) { |
1565 |
|
|
if (onlyIfPresent) |
1566 |
|
|
break; |
1567 |
|
|
Node node = new Node(fh = h | LOCKED, k, null, null); |
1568 |
|
|
if (casTabAt(tab, i, null, node)) { |
1569 |
|
|
try { |
1570 |
|
|
count = 1; |
1571 |
|
|
if ((val = mf.apply(k, null)) != null) { |
1572 |
|
|
node.val = val; |
1573 |
|
|
delta = 1; |
1574 |
|
|
} |
1575 |
|
|
} finally { |
1576 |
|
|
if (delta == 0) |
1577 |
|
|
setTabAt(tab, i, null); |
1578 |
|
|
if (!node.casHash(fh, h)) { |
1579 |
|
|
node.hash = h; |
1580 |
|
|
synchronized (node) { node.notifyAll(); }; |
1581 |
|
|
} |
1582 |
|
|
} |
1583 |
|
|
} |
1584 |
|
|
if (count != 0) |
1585 |
|
|
break; |
1586 |
|
|
} |
1587 |
|
|
else if ((fh = f.hash) == MOVED) { |
1588 |
|
|
if ((fk = f.key) instanceof TreeBin) { |
1589 |
|
|
TreeBin t = (TreeBin)fk; |
1590 |
|
|
t.acquire(0); |
1591 |
|
|
try { |
1592 |
|
|
if (tabAt(tab, i) == f) { |
1593 |
|
|
count = 1; |
1594 |
|
|
TreeNode p = t.getTreeNode(h, k, t.root); |
1595 |
|
|
Object pv = (p == null) ? null : p.val; |
1596 |
|
|
if ((val = mf.apply(k, (V)pv)) != null) { |
1597 |
|
|
if (p != null) |
1598 |
|
|
p.val = val; |
1599 |
|
|
else { |
1600 |
|
|
count = 2; |
1601 |
|
|
delta = 1; |
1602 |
|
|
t.putTreeNode(h, k, val); |
1603 |
|
|
} |
1604 |
|
|
} |
1605 |
|
|
else if (p != null) { |
1606 |
|
|
delta = -1; |
1607 |
|
|
t.deleteTreeNode(p); |
1608 |
|
|
} |
1609 |
|
|
} |
1610 |
|
|
} finally { |
1611 |
|
|
t.release(0); |
1612 |
|
|
} |
1613 |
|
|
if (count != 0) |
1614 |
|
|
break; |
1615 |
|
|
} |
1616 |
|
|
else |
1617 |
|
|
tab = (Node[])fk; |
1618 |
|
|
} |
1619 |
|
|
else if ((fh & LOCKED) != 0) { |
1620 |
|
|
checkForResize(); |
1621 |
|
|
f.tryAwaitLock(tab, i); |
1622 |
|
|
} |
1623 |
|
|
else if (f.casHash(fh, fh | LOCKED)) { |
1624 |
|
|
try { |
1625 |
|
|
if (tabAt(tab, i) == f) { |
1626 |
|
|
count = 1; |
1627 |
|
|
for (Node e = f, pred = null;; ++count) { |
1628 |
|
|
Object ek, ev; |
1629 |
|
|
if ((e.hash & HASH_BITS) == h && |
1630 |
|
|
(ev = e.val) != null && |
1631 |
|
|
((ek = e.key) == k || k.equals(ek))) { |
1632 |
|
|
val = mf.apply(k, (V)ev); |
1633 |
|
|
if (val != null) |
1634 |
|
|
e.val = val; |
1635 |
|
|
else { |
1636 |
|
|
delta = -1; |
1637 |
|
|
Node en = e.next; |
1638 |
|
|
if (pred != null) |
1639 |
|
|
pred.next = en; |
1640 |
|
|
else |
1641 |
|
|
setTabAt(tab, i, en); |
1642 |
|
|
} |
1643 |
|
|
break; |
1644 |
|
|
} |
1645 |
|
|
pred = e; |
1646 |
|
|
if ((e = e.next) == null) { |
1647 |
|
|
if (!onlyIfPresent && (val = mf.apply(k, null)) != null) { |
1648 |
|
|
pred.next = new Node(h, k, val, null); |
1649 |
|
|
delta = 1; |
1650 |
|
|
if (count >= TREE_THRESHOLD) |
1651 |
|
|
replaceWithTreeBin(tab, i, k); |
1652 |
|
|
} |
1653 |
|
|
break; |
1654 |
|
|
} |
1655 |
|
|
} |
1656 |
|
|
} |
1657 |
|
|
} finally { |
1658 |
|
|
if (!f.casHash(fh | LOCKED, fh)) { |
1659 |
|
|
f.hash = fh; |
1660 |
|
|
synchronized (f) { f.notifyAll(); }; |
1661 |
|
|
} |
1662 |
|
|
} |
1663 |
|
|
if (count != 0) { |
1664 |
|
|
if (tab.length <= 64) |
1665 |
|
|
count = 2; |
1666 |
|
|
break; |
1667 |
|
|
} |
1668 |
|
|
} |
1669 |
|
|
} |
1670 |
|
|
if (delta != 0) { |
1671 |
|
|
counter.add((long)delta); |
1672 |
|
|
if (count > 1) |
1673 |
|
|
checkForResize(); |
1674 |
|
|
} |
1675 |
|
|
return val; |
1676 |
|
|
} |
1677 |
|
|
|
1678 |
dl |
1.126 |
/** Implementation for merge */ |
1679 |
|
|
@SuppressWarnings("unchecked") |
1680 |
dl |
1.119 |
private final Object internalMerge(K k, V v, |
1681 |
|
|
BiFun<? super V, ? super V, ? extends V> mf) { |
1682 |
|
|
int h = spread(k.hashCode()); |
1683 |
|
|
Object val = null; |
1684 |
|
|
int delta = 0; |
1685 |
|
|
int count = 0; |
1686 |
|
|
for (Node[] tab = table;;) { |
1687 |
|
|
int i; Node f; int fh; Object fk, fv; |
1688 |
|
|
if (tab == null) |
1689 |
|
|
tab = initTable(); |
1690 |
|
|
else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) { |
1691 |
|
|
if (casTabAt(tab, i, null, new Node(h, k, v, null))) { |
1692 |
|
|
delta = 1; |
1693 |
|
|
val = v; |
1694 |
|
|
break; |
1695 |
|
|
} |
1696 |
|
|
} |
1697 |
|
|
else if ((fh = f.hash) == MOVED) { |
1698 |
|
|
if ((fk = f.key) instanceof TreeBin) { |
1699 |
|
|
TreeBin t = (TreeBin)fk; |
1700 |
|
|
t.acquire(0); |
1701 |
|
|
try { |
1702 |
|
|
if (tabAt(tab, i) == f) { |
1703 |
|
|
count = 1; |
1704 |
|
|
TreeNode p = t.getTreeNode(h, k, t.root); |
1705 |
|
|
val = (p == null) ? v : mf.apply((V)p.val, v); |
1706 |
|
|
if (val != null) { |
1707 |
|
|
if (p != null) |
1708 |
|
|
p.val = val; |
1709 |
|
|
else { |
1710 |
|
|
count = 2; |
1711 |
|
|
delta = 1; |
1712 |
|
|
t.putTreeNode(h, k, val); |
1713 |
|
|
} |
1714 |
|
|
} |
1715 |
|
|
else if (p != null) { |
1716 |
|
|
delta = -1; |
1717 |
|
|
t.deleteTreeNode(p); |
1718 |
|
|
} |
1719 |
|
|
} |
1720 |
|
|
} finally { |
1721 |
|
|
t.release(0); |
1722 |
|
|
} |
1723 |
|
|
if (count != 0) |
1724 |
|
|
break; |
1725 |
|
|
} |
1726 |
|
|
else |
1727 |
|
|
tab = (Node[])fk; |
1728 |
|
|
} |
1729 |
|
|
else if ((fh & LOCKED) != 0) { |
1730 |
|
|
checkForResize(); |
1731 |
|
|
f.tryAwaitLock(tab, i); |
1732 |
|
|
} |
1733 |
|
|
else if (f.casHash(fh, fh | LOCKED)) { |
1734 |
|
|
try { |
1735 |
|
|
if (tabAt(tab, i) == f) { |
1736 |
|
|
count = 1; |
1737 |
|
|
for (Node e = f, pred = null;; ++count) { |
1738 |
|
|
Object ek, ev; |
1739 |
|
|
if ((e.hash & HASH_BITS) == h && |
1740 |
|
|
(ev = e.val) != null && |
1741 |
|
|
((ek = e.key) == k || k.equals(ek))) { |
1742 |
|
|
val = mf.apply(v, (V)ev); |
1743 |
|
|
if (val != null) |
1744 |
|
|
e.val = val; |
1745 |
|
|
else { |
1746 |
|
|
delta = -1; |
1747 |
|
|
Node en = e.next; |
1748 |
|
|
if (pred != null) |
1749 |
|
|
pred.next = en; |
1750 |
|
|
else |
1751 |
|
|
setTabAt(tab, i, en); |
1752 |
|
|
} |
1753 |
|
|
break; |
1754 |
|
|
} |
1755 |
|
|
pred = e; |
1756 |
|
|
if ((e = e.next) == null) { |
1757 |
|
|
val = v; |
1758 |
|
|
pred.next = new Node(h, k, val, null); |
1759 |
|
|
delta = 1; |
1760 |
|
|
if (count >= TREE_THRESHOLD) |
1761 |
|
|
replaceWithTreeBin(tab, i, k); |
1762 |
|
|
break; |
1763 |
|
|
} |
1764 |
|
|
} |
1765 |
|
|
} |
1766 |
|
|
} finally { |
1767 |
|
|
if (!f.casHash(fh | LOCKED, fh)) { |
1768 |
|
|
f.hash = fh; |
1769 |
|
|
synchronized (f) { f.notifyAll(); }; |
1770 |
|
|
} |
1771 |
|
|
} |
1772 |
|
|
if (count != 0) { |
1773 |
|
|
if (tab.length <= 64) |
1774 |
|
|
count = 2; |
1775 |
|
|
break; |
1776 |
|
|
} |
1777 |
dl |
1.105 |
} |
1778 |
dl |
1.99 |
} |
1779 |
dl |
1.119 |
if (delta != 0) { |
1780 |
|
|
counter.add((long)delta); |
1781 |
|
|
if (count > 1) |
1782 |
|
|
checkForResize(); |
1783 |
|
|
} |
1784 |
|
|
return val; |
1785 |
|
|
} |
1786 |
|
|
|
1787 |
|
|
/** Implementation for putAll */ |
1788 |
|
|
private final void internalPutAll(Map<?, ?> m) { |
1789 |
|
|
tryPresize(m.size()); |
1790 |
|
|
long delta = 0L; // number of uncommitted additions |
1791 |
|
|
boolean npe = false; // to throw exception on exit for nulls |
1792 |
|
|
try { // to clean up counts on other exceptions |
1793 |
|
|
for (Map.Entry<?, ?> entry : m.entrySet()) { |
1794 |
|
|
Object k, v; |
1795 |
|
|
if (entry == null || (k = entry.getKey()) == null || |
1796 |
|
|
(v = entry.getValue()) == null) { |
1797 |
|
|
npe = true; |
1798 |
|
|
break; |
1799 |
|
|
} |
1800 |
|
|
int h = spread(k.hashCode()); |
1801 |
|
|
for (Node[] tab = table;;) { |
1802 |
|
|
int i; Node f; int fh; Object fk; |
1803 |
|
|
if (tab == null) |
1804 |
|
|
tab = initTable(); |
1805 |
|
|
else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null){ |
1806 |
|
|
if (casTabAt(tab, i, null, new Node(h, k, v, null))) { |
1807 |
|
|
++delta; |
1808 |
|
|
break; |
1809 |
|
|
} |
1810 |
|
|
} |
1811 |
|
|
else if ((fh = f.hash) == MOVED) { |
1812 |
|
|
if ((fk = f.key) instanceof TreeBin) { |
1813 |
|
|
TreeBin t = (TreeBin)fk; |
1814 |
|
|
boolean validated = false; |
1815 |
|
|
t.acquire(0); |
1816 |
|
|
try { |
1817 |
|
|
if (tabAt(tab, i) == f) { |
1818 |
|
|
validated = true; |
1819 |
|
|
TreeNode p = t.getTreeNode(h, k, t.root); |
1820 |
|
|
if (p != null) |
1821 |
|
|
p.val = v; |
1822 |
|
|
else { |
1823 |
|
|
t.putTreeNode(h, k, v); |
1824 |
|
|
++delta; |
1825 |
|
|
} |
1826 |
|
|
} |
1827 |
|
|
} finally { |
1828 |
|
|
t.release(0); |
1829 |
|
|
} |
1830 |
|
|
if (validated) |
1831 |
|
|
break; |
1832 |
|
|
} |
1833 |
|
|
else |
1834 |
|
|
tab = (Node[])fk; |
1835 |
|
|
} |
1836 |
|
|
else if ((fh & LOCKED) != 0) { |
1837 |
|
|
counter.add(delta); |
1838 |
|
|
delta = 0L; |
1839 |
|
|
checkForResize(); |
1840 |
|
|
f.tryAwaitLock(tab, i); |
1841 |
|
|
} |
1842 |
|
|
else if (f.casHash(fh, fh | LOCKED)) { |
1843 |
|
|
int count = 0; |
1844 |
|
|
try { |
1845 |
|
|
if (tabAt(tab, i) == f) { |
1846 |
|
|
count = 1; |
1847 |
|
|
for (Node e = f;; ++count) { |
1848 |
|
|
Object ek, ev; |
1849 |
|
|
if ((e.hash & HASH_BITS) == h && |
1850 |
|
|
(ev = e.val) != null && |
1851 |
|
|
((ek = e.key) == k || k.equals(ek))) { |
1852 |
|
|
e.val = v; |
1853 |
|
|
break; |
1854 |
|
|
} |
1855 |
|
|
Node last = e; |
1856 |
|
|
if ((e = e.next) == null) { |
1857 |
|
|
++delta; |
1858 |
|
|
last.next = new Node(h, k, v, null); |
1859 |
|
|
if (count >= TREE_THRESHOLD) |
1860 |
|
|
replaceWithTreeBin(tab, i, k); |
1861 |
|
|
break; |
1862 |
|
|
} |
1863 |
|
|
} |
1864 |
|
|
} |
1865 |
|
|
} finally { |
1866 |
|
|
if (!f.casHash(fh | LOCKED, fh)) { |
1867 |
|
|
f.hash = fh; |
1868 |
|
|
synchronized (f) { f.notifyAll(); }; |
1869 |
|
|
} |
1870 |
|
|
} |
1871 |
|
|
if (count != 0) { |
1872 |
|
|
if (count > 1) { |
1873 |
|
|
counter.add(delta); |
1874 |
|
|
delta = 0L; |
1875 |
|
|
checkForResize(); |
1876 |
dl |
1.99 |
} |
1877 |
dl |
1.119 |
break; |
1878 |
dl |
1.99 |
} |
1879 |
dl |
1.21 |
} |
1880 |
|
|
} |
1881 |
dl |
1.45 |
} |
1882 |
|
|
} finally { |
1883 |
dl |
1.119 |
if (delta != 0) |
1884 |
|
|
counter.add(delta); |
1885 |
dl |
1.45 |
} |
1886 |
dl |
1.119 |
if (npe) |
1887 |
|
|
throw new NullPointerException(); |
1888 |
tim |
1.1 |
} |
1889 |
dl |
1.19 |
|
1890 |
dl |
1.119 |
/* ---------------- Table Initialization and Resizing -------------- */ |
1891 |
|
|
|
1892 |
tim |
1.1 |
/** |
1893 |
dl |
1.119 |
* Returns a power of two table size for the given desired capacity. |
1894 |
|
|
* See Hackers Delight, sec 3.2 |
1895 |
tim |
1.1 |
*/ |
1896 |
dl |
1.119 |
private static final int tableSizeFor(int c) { |
1897 |
|
|
int n = c - 1; |
1898 |
|
|
n |= n >>> 1; |
1899 |
|
|
n |= n >>> 2; |
1900 |
|
|
n |= n >>> 4; |
1901 |
|
|
n |= n >>> 8; |
1902 |
|
|
n |= n >>> 16; |
1903 |
|
|
return (n < 0) ? 1 : (n >= MAXIMUM_CAPACITY) ? MAXIMUM_CAPACITY : n + 1; |
1904 |
tim |
1.1 |
} |
1905 |
|
|
|
1906 |
|
|
/** |
1907 |
dl |
1.119 |
* Initializes table, using the size recorded in sizeCtl. |
1908 |
|
|
*/ |
1909 |
|
|
private final Node[] initTable() { |
1910 |
|
|
Node[] tab; int sc; |
1911 |
|
|
while ((tab = table) == null) { |
1912 |
|
|
if ((sc = sizeCtl) < 0) |
1913 |
|
|
Thread.yield(); // lost initialization race; just spin |
1914 |
|
|
else if (UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) { |
1915 |
|
|
try { |
1916 |
|
|
if ((tab = table) == null) { |
1917 |
|
|
int n = (sc > 0) ? sc : DEFAULT_CAPACITY; |
1918 |
|
|
tab = table = new Node[n]; |
1919 |
|
|
sc = n - (n >>> 2); |
1920 |
|
|
} |
1921 |
|
|
} finally { |
1922 |
|
|
sizeCtl = sc; |
1923 |
|
|
} |
1924 |
|
|
break; |
1925 |
|
|
} |
1926 |
|
|
} |
1927 |
|
|
return tab; |
1928 |
dl |
1.4 |
} |
1929 |
|
|
|
1930 |
|
|
/** |
1931 |
dl |
1.119 |
* If table is too small and not already resizing, creates next |
1932 |
|
|
* table and transfers bins. Rechecks occupancy after a transfer |
1933 |
|
|
* to see if another resize is already needed because resizings |
1934 |
|
|
* are lagging additions. |
1935 |
dl |
1.51 |
*/ |
1936 |
dl |
1.119 |
private final void checkForResize() { |
1937 |
|
|
Node[] tab; int n, sc; |
1938 |
|
|
while ((tab = table) != null && |
1939 |
|
|
(n = tab.length) < MAXIMUM_CAPACITY && |
1940 |
|
|
(sc = sizeCtl) >= 0 && counter.sum() >= (long)sc && |
1941 |
|
|
UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) { |
1942 |
|
|
try { |
1943 |
|
|
if (tab == table) { |
1944 |
|
|
table = rebuild(tab); |
1945 |
|
|
sc = (n << 1) - (n >>> 1); |
1946 |
|
|
} |
1947 |
|
|
} finally { |
1948 |
|
|
sizeCtl = sc; |
1949 |
|
|
} |
1950 |
|
|
} |
1951 |
dl |
1.4 |
} |
1952 |
|
|
|
1953 |
|
|
/** |
1954 |
dl |
1.119 |
* Tries to presize table to accommodate the given number of elements. |
1955 |
tim |
1.1 |
* |
1956 |
dl |
1.119 |
* @param size number of elements (doesn't need to be perfectly accurate) |
1957 |
tim |
1.1 |
*/ |
1958 |
dl |
1.119 |
private final void tryPresize(int size) { |
1959 |
|
|
int c = (size >= (MAXIMUM_CAPACITY >>> 1)) ? MAXIMUM_CAPACITY : |
1960 |
|
|
tableSizeFor(size + (size >>> 1) + 1); |
1961 |
|
|
int sc; |
1962 |
|
|
while ((sc = sizeCtl) >= 0) { |
1963 |
|
|
Node[] tab = table; int n; |
1964 |
|
|
if (tab == null || (n = tab.length) == 0) { |
1965 |
|
|
n = (sc > c) ? sc : c; |
1966 |
|
|
if (UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) { |
1967 |
|
|
try { |
1968 |
|
|
if (table == tab) { |
1969 |
|
|
table = new Node[n]; |
1970 |
|
|
sc = n - (n >>> 2); |
1971 |
|
|
} |
1972 |
|
|
} finally { |
1973 |
|
|
sizeCtl = sc; |
1974 |
|
|
} |
1975 |
|
|
} |
1976 |
|
|
} |
1977 |
|
|
else if (c <= sc || n >= MAXIMUM_CAPACITY) |
1978 |
|
|
break; |
1979 |
|
|
else if (UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) { |
1980 |
|
|
try { |
1981 |
|
|
if (table == tab) { |
1982 |
|
|
table = rebuild(tab); |
1983 |
|
|
sc = (n << 1) - (n >>> 1); |
1984 |
|
|
} |
1985 |
|
|
} finally { |
1986 |
|
|
sizeCtl = sc; |
1987 |
|
|
} |
1988 |
|
|
} |
1989 |
|
|
} |
1990 |
dl |
1.4 |
} |
1991 |
|
|
|
1992 |
dl |
1.119 |
/* |
1993 |
|
|
* Moves and/or copies the nodes in each bin to new table. See |
1994 |
|
|
* above for explanation. |
1995 |
dl |
1.4 |
* |
1996 |
dl |
1.119 |
* @return the new table |
1997 |
dl |
1.4 |
*/ |
1998 |
dl |
1.119 |
private static final Node[] rebuild(Node[] tab) { |
1999 |
|
|
int n = tab.length; |
2000 |
|
|
Node[] nextTab = new Node[n << 1]; |
2001 |
|
|
Node fwd = new Node(MOVED, nextTab, null, null); |
2002 |
|
|
int[] buffer = null; // holds bins to revisit; null until needed |
2003 |
|
|
Node rev = null; // reverse forwarder; null until needed |
2004 |
|
|
int nbuffered = 0; // the number of bins in buffer list |
2005 |
|
|
int bufferIndex = 0; // buffer index of current buffered bin |
2006 |
|
|
int bin = n - 1; // current non-buffered bin or -1 if none |
2007 |
|
|
|
2008 |
|
|
for (int i = bin;;) { // start upwards sweep |
2009 |
|
|
int fh; Node f; |
2010 |
|
|
if ((f = tabAt(tab, i)) == null) { |
2011 |
|
|
if (bin >= 0) { // no lock needed (or available) |
2012 |
|
|
if (!casTabAt(tab, i, f, fwd)) |
2013 |
|
|
continue; |
2014 |
|
|
} |
2015 |
|
|
else { // transiently use a locked forwarding node |
2016 |
|
|
Node g = new Node(MOVED|LOCKED, nextTab, null, null); |
2017 |
|
|
if (!casTabAt(tab, i, f, g)) |
2018 |
|
|
continue; |
2019 |
|
|
setTabAt(nextTab, i, null); |
2020 |
|
|
setTabAt(nextTab, i + n, null); |
2021 |
|
|
setTabAt(tab, i, fwd); |
2022 |
|
|
if (!g.casHash(MOVED|LOCKED, MOVED)) { |
2023 |
|
|
g.hash = MOVED; |
2024 |
|
|
synchronized (g) { g.notifyAll(); } |
2025 |
|
|
} |
2026 |
|
|
} |
2027 |
|
|
} |
2028 |
|
|
else if ((fh = f.hash) == MOVED) { |
2029 |
|
|
Object fk = f.key; |
2030 |
|
|
if (fk instanceof TreeBin) { |
2031 |
|
|
TreeBin t = (TreeBin)fk; |
2032 |
|
|
boolean validated = false; |
2033 |
|
|
t.acquire(0); |
2034 |
|
|
try { |
2035 |
|
|
if (tabAt(tab, i) == f) { |
2036 |
|
|
validated = true; |
2037 |
|
|
splitTreeBin(nextTab, i, t); |
2038 |
|
|
setTabAt(tab, i, fwd); |
2039 |
|
|
} |
2040 |
|
|
} finally { |
2041 |
|
|
t.release(0); |
2042 |
|
|
} |
2043 |
|
|
if (!validated) |
2044 |
|
|
continue; |
2045 |
|
|
} |
2046 |
|
|
} |
2047 |
|
|
else if ((fh & LOCKED) == 0 && f.casHash(fh, fh|LOCKED)) { |
2048 |
|
|
boolean validated = false; |
2049 |
|
|
try { // split to lo and hi lists; copying as needed |
2050 |
|
|
if (tabAt(tab, i) == f) { |
2051 |
|
|
validated = true; |
2052 |
|
|
splitBin(nextTab, i, f); |
2053 |
|
|
setTabAt(tab, i, fwd); |
2054 |
|
|
} |
2055 |
|
|
} finally { |
2056 |
|
|
if (!f.casHash(fh | LOCKED, fh)) { |
2057 |
|
|
f.hash = fh; |
2058 |
|
|
synchronized (f) { f.notifyAll(); }; |
2059 |
|
|
} |
2060 |
|
|
} |
2061 |
|
|
if (!validated) |
2062 |
|
|
continue; |
2063 |
|
|
} |
2064 |
|
|
else { |
2065 |
|
|
if (buffer == null) // initialize buffer for revisits |
2066 |
|
|
buffer = new int[TRANSFER_BUFFER_SIZE]; |
2067 |
|
|
if (bin < 0 && bufferIndex > 0) { |
2068 |
|
|
int j = buffer[--bufferIndex]; |
2069 |
|
|
buffer[bufferIndex] = i; |
2070 |
|
|
i = j; // swap with another bin |
2071 |
|
|
continue; |
2072 |
|
|
} |
2073 |
|
|
if (bin < 0 || nbuffered >= TRANSFER_BUFFER_SIZE) { |
2074 |
|
|
f.tryAwaitLock(tab, i); |
2075 |
|
|
continue; // no other options -- block |
2076 |
|
|
} |
2077 |
|
|
if (rev == null) // initialize reverse-forwarder |
2078 |
|
|
rev = new Node(MOVED, tab, null, null); |
2079 |
|
|
if (tabAt(tab, i) != f || (f.hash & LOCKED) == 0) |
2080 |
|
|
continue; // recheck before adding to list |
2081 |
|
|
buffer[nbuffered++] = i; |
2082 |
|
|
setTabAt(nextTab, i, rev); // install place-holders |
2083 |
|
|
setTabAt(nextTab, i + n, rev); |
2084 |
|
|
} |
2085 |
|
|
|
2086 |
|
|
if (bin > 0) |
2087 |
|
|
i = --bin; |
2088 |
|
|
else if (buffer != null && nbuffered > 0) { |
2089 |
|
|
bin = -1; |
2090 |
|
|
i = buffer[bufferIndex = --nbuffered]; |
2091 |
|
|
} |
2092 |
|
|
else |
2093 |
|
|
return nextTab; |
2094 |
|
|
} |
2095 |
dl |
1.4 |
} |
2096 |
tim |
1.1 |
|
2097 |
dl |
1.4 |
/** |
2098 |
dl |
1.119 |
* Splits a normal bin with list headed by e into lo and hi parts; |
2099 |
|
|
* installs in given table. |
2100 |
dl |
1.4 |
*/ |
2101 |
dl |
1.119 |
private static void splitBin(Node[] nextTab, int i, Node e) { |
2102 |
|
|
int bit = nextTab.length >>> 1; // bit to split on |
2103 |
|
|
int runBit = e.hash & bit; |
2104 |
|
|
Node lastRun = e, lo = null, hi = null; |
2105 |
|
|
for (Node p = e.next; p != null; p = p.next) { |
2106 |
|
|
int b = p.hash & bit; |
2107 |
|
|
if (b != runBit) { |
2108 |
|
|
runBit = b; |
2109 |
|
|
lastRun = p; |
2110 |
|
|
} |
2111 |
|
|
} |
2112 |
|
|
if (runBit == 0) |
2113 |
|
|
lo = lastRun; |
2114 |
|
|
else |
2115 |
|
|
hi = lastRun; |
2116 |
|
|
for (Node p = e; p != lastRun; p = p.next) { |
2117 |
|
|
int ph = p.hash & HASH_BITS; |
2118 |
|
|
Object pk = p.key, pv = p.val; |
2119 |
|
|
if ((ph & bit) == 0) |
2120 |
|
|
lo = new Node(ph, pk, pv, lo); |
2121 |
|
|
else |
2122 |
|
|
hi = new Node(ph, pk, pv, hi); |
2123 |
|
|
} |
2124 |
|
|
setTabAt(nextTab, i, lo); |
2125 |
|
|
setTabAt(nextTab, i + bit, hi); |
2126 |
|
|
} |
2127 |
|
|
|
2128 |
|
|
/** |
2129 |
|
|
* Splits a tree bin into lo and hi parts; installs in given table. |
2130 |
|
|
*/ |
2131 |
|
|
private static void splitTreeBin(Node[] nextTab, int i, TreeBin t) { |
2132 |
|
|
int bit = nextTab.length >>> 1; |
2133 |
|
|
TreeBin lt = new TreeBin(); |
2134 |
|
|
TreeBin ht = new TreeBin(); |
2135 |
|
|
int lc = 0, hc = 0; |
2136 |
|
|
for (Node e = t.first; e != null; e = e.next) { |
2137 |
|
|
int h = e.hash & HASH_BITS; |
2138 |
|
|
Object k = e.key, v = e.val; |
2139 |
|
|
if ((h & bit) == 0) { |
2140 |
|
|
++lc; |
2141 |
|
|
lt.putTreeNode(h, k, v); |
2142 |
|
|
} |
2143 |
|
|
else { |
2144 |
|
|
++hc; |
2145 |
|
|
ht.putTreeNode(h, k, v); |
2146 |
|
|
} |
2147 |
|
|
} |
2148 |
|
|
Node ln, hn; // throw away trees if too small |
2149 |
|
|
if (lc <= (TREE_THRESHOLD >>> 1)) { |
2150 |
|
|
ln = null; |
2151 |
|
|
for (Node p = lt.first; p != null; p = p.next) |
2152 |
|
|
ln = new Node(p.hash, p.key, p.val, ln); |
2153 |
|
|
} |
2154 |
|
|
else |
2155 |
|
|
ln = new Node(MOVED, lt, null, null); |
2156 |
|
|
setTabAt(nextTab, i, ln); |
2157 |
|
|
if (hc <= (TREE_THRESHOLD >>> 1)) { |
2158 |
|
|
hn = null; |
2159 |
|
|
for (Node p = ht.first; p != null; p = p.next) |
2160 |
|
|
hn = new Node(p.hash, p.key, p.val, hn); |
2161 |
|
|
} |
2162 |
|
|
else |
2163 |
|
|
hn = new Node(MOVED, ht, null, null); |
2164 |
|
|
setTabAt(nextTab, i + bit, hn); |
2165 |
|
|
} |
2166 |
|
|
|
2167 |
|
|
/** |
2168 |
|
|
* Implementation for clear. Steps through each bin, removing all |
2169 |
|
|
* nodes. |
2170 |
|
|
*/ |
2171 |
|
|
private final void internalClear() { |
2172 |
|
|
long delta = 0L; // negative number of deletions |
2173 |
|
|
int i = 0; |
2174 |
|
|
Node[] tab = table; |
2175 |
|
|
while (tab != null && i < tab.length) { |
2176 |
|
|
int fh; Object fk; |
2177 |
|
|
Node f = tabAt(tab, i); |
2178 |
|
|
if (f == null) |
2179 |
|
|
++i; |
2180 |
|
|
else if ((fh = f.hash) == MOVED) { |
2181 |
|
|
if ((fk = f.key) instanceof TreeBin) { |
2182 |
|
|
TreeBin t = (TreeBin)fk; |
2183 |
|
|
t.acquire(0); |
2184 |
|
|
try { |
2185 |
|
|
if (tabAt(tab, i) == f) { |
2186 |
|
|
for (Node p = t.first; p != null; p = p.next) { |
2187 |
|
|
p.val = null; |
2188 |
|
|
--delta; |
2189 |
|
|
} |
2190 |
|
|
t.first = null; |
2191 |
|
|
t.root = null; |
2192 |
|
|
++i; |
2193 |
|
|
} |
2194 |
|
|
} finally { |
2195 |
|
|
t.release(0); |
2196 |
|
|
} |
2197 |
|
|
} |
2198 |
|
|
else |
2199 |
|
|
tab = (Node[])fk; |
2200 |
|
|
} |
2201 |
|
|
else if ((fh & LOCKED) != 0) { |
2202 |
|
|
counter.add(delta); // opportunistically update count |
2203 |
|
|
delta = 0L; |
2204 |
|
|
f.tryAwaitLock(tab, i); |
2205 |
|
|
} |
2206 |
|
|
else if (f.casHash(fh, fh | LOCKED)) { |
2207 |
|
|
try { |
2208 |
|
|
if (tabAt(tab, i) == f) { |
2209 |
|
|
for (Node e = f; e != null; e = e.next) { |
2210 |
|
|
e.val = null; |
2211 |
|
|
--delta; |
2212 |
|
|
} |
2213 |
|
|
setTabAt(tab, i, null); |
2214 |
|
|
++i; |
2215 |
|
|
} |
2216 |
|
|
} finally { |
2217 |
|
|
if (!f.casHash(fh | LOCKED, fh)) { |
2218 |
|
|
f.hash = fh; |
2219 |
|
|
synchronized (f) { f.notifyAll(); }; |
2220 |
|
|
} |
2221 |
|
|
} |
2222 |
|
|
} |
2223 |
|
|
} |
2224 |
|
|
if (delta != 0) |
2225 |
|
|
counter.add(delta); |
2226 |
|
|
} |
2227 |
|
|
|
2228 |
|
|
/* ----------------Table Traversal -------------- */ |
2229 |
|
|
|
2230 |
|
|
/** |
2231 |
|
|
* Encapsulates traversal for methods such as containsValue; also |
2232 |
dl |
1.126 |
* serves as a base class for other iterators and bulk tasks. |
2233 |
dl |
1.119 |
* |
2234 |
|
|
* At each step, the iterator snapshots the key ("nextKey") and |
2235 |
|
|
* value ("nextVal") of a valid node (i.e., one that, at point of |
2236 |
|
|
* snapshot, has a non-null user value). Because val fields can |
2237 |
|
|
* change (including to null, indicating deletion), field nextVal |
2238 |
|
|
* might not be accurate at point of use, but still maintains the |
2239 |
|
|
* weak consistency property of holding a value that was once |
2240 |
|
|
* valid. |
2241 |
|
|
* |
2242 |
|
|
* Internal traversals directly access these fields, as in: |
2243 |
|
|
* {@code while (it.advance() != null) { process(it.nextKey); }} |
2244 |
|
|
* |
2245 |
|
|
* Exported iterators must track whether the iterator has advanced |
2246 |
|
|
* (in hasNext vs next) (by setting/checking/nulling field |
2247 |
|
|
* nextVal), and then extract key, value, or key-value pairs as |
2248 |
|
|
* return values of next(). |
2249 |
|
|
* |
2250 |
|
|
* The iterator visits once each still-valid node that was |
2251 |
|
|
* reachable upon iterator construction. It might miss some that |
2252 |
|
|
* were added to a bin after the bin was visited, which is OK wrt |
2253 |
|
|
* consistency guarantees. Maintaining this property in the face |
2254 |
|
|
* of possible ongoing resizes requires a fair amount of |
2255 |
|
|
* bookkeeping state that is difficult to optimize away amidst |
2256 |
|
|
* volatile accesses. Even so, traversal maintains reasonable |
2257 |
|
|
* throughput. |
2258 |
|
|
* |
2259 |
|
|
* Normally, iteration proceeds bin-by-bin traversing lists. |
2260 |
|
|
* However, if the table has been resized, then all future steps |
2261 |
|
|
* must traverse both the bin at the current index as well as at |
2262 |
|
|
* (index + baseSize); and so on for further resizings. To |
2263 |
|
|
* paranoically cope with potential sharing by users of iterators |
2264 |
|
|
* across threads, iteration terminates if a bounds checks fails |
2265 |
|
|
* for a table read. |
2266 |
|
|
* |
2267 |
|
|
* This class extends ForkJoinTask to streamline parallel |
2268 |
|
|
* iteration in bulk operations (see BulkTask). This adds only an |
2269 |
|
|
* int of space overhead, which is close enough to negligible in |
2270 |
dl |
1.126 |
* cases where it is not needed to not worry about it. Because |
2271 |
|
|
* ForkJoinTask is Serializable, but iterators need not be, we |
2272 |
|
|
* need to add warning suppressions. |
2273 |
dl |
1.119 |
*/ |
2274 |
dl |
1.126 |
@SuppressWarnings("serial") |
2275 |
dl |
1.119 |
static class Traverser<K,V,R> extends ForkJoinTask<R> { |
2276 |
|
|
final ConcurrentHashMap<K, V> map; |
2277 |
|
|
Node next; // the next entry to use |
2278 |
|
|
Node last; // the last entry used |
2279 |
|
|
Object nextKey; // cached key field of next |
2280 |
|
|
Object nextVal; // cached val field of next |
2281 |
|
|
Node[] tab; // current table; updated if resized |
2282 |
|
|
int index; // index of bin to use next |
2283 |
|
|
int baseIndex; // current index of initial table |
2284 |
|
|
int baseLimit; // index bound for initial table |
2285 |
|
|
final int baseSize; // initial table size |
2286 |
|
|
|
2287 |
|
|
/** Creates iterator for all entries in the table. */ |
2288 |
|
|
Traverser(ConcurrentHashMap<K, V> map) { |
2289 |
|
|
this.tab = (this.map = map).table; |
2290 |
|
|
baseLimit = baseSize = (tab == null) ? 0 : tab.length; |
2291 |
|
|
} |
2292 |
|
|
|
2293 |
|
|
/** Creates iterator for split() methods */ |
2294 |
|
|
Traverser(Traverser<K,V,?> it, boolean split) { |
2295 |
|
|
this.map = it.map; |
2296 |
|
|
this.tab = it.tab; |
2297 |
|
|
this.baseSize = it.baseSize; |
2298 |
|
|
int lo = it.baseIndex; |
2299 |
|
|
int hi = this.baseLimit = it.baseLimit; |
2300 |
|
|
int i; |
2301 |
|
|
if (split) // adjust parent |
2302 |
|
|
i = it.baseLimit = (lo + hi + 1) >>> 1; |
2303 |
|
|
else // clone parent |
2304 |
|
|
i = lo; |
2305 |
|
|
this.index = this.baseIndex = i; |
2306 |
|
|
} |
2307 |
|
|
|
2308 |
|
|
/** |
2309 |
|
|
* Advances next; returns nextVal or null if terminated. |
2310 |
|
|
* See above for explanation. |
2311 |
|
|
*/ |
2312 |
|
|
final Object advance() { |
2313 |
|
|
Node e = last = next; |
2314 |
|
|
Object ev = null; |
2315 |
|
|
outer: do { |
2316 |
|
|
if (e != null) // advance past used/skipped node |
2317 |
|
|
e = e.next; |
2318 |
|
|
while (e == null) { // get to next non-null bin |
2319 |
|
|
Node[] t; int b, i, n; Object ek; // checks must use locals |
2320 |
|
|
if ((b = baseIndex) >= baseLimit || (i = index) < 0 || |
2321 |
|
|
(t = tab) == null || i >= (n = t.length)) |
2322 |
|
|
break outer; |
2323 |
|
|
else if ((e = tabAt(t, i)) != null && e.hash == MOVED) { |
2324 |
|
|
if ((ek = e.key) instanceof TreeBin) |
2325 |
|
|
e = ((TreeBin)ek).first; |
2326 |
|
|
else { |
2327 |
|
|
tab = (Node[])ek; |
2328 |
|
|
continue; // restarts due to null val |
2329 |
|
|
} |
2330 |
|
|
} // visit upper slots if present |
2331 |
|
|
index = (i += baseSize) < n ? i : (baseIndex = b + 1); |
2332 |
|
|
} |
2333 |
|
|
nextKey = e.key; |
2334 |
|
|
} while ((ev = e.val) == null); // skip deleted or special nodes |
2335 |
|
|
next = e; |
2336 |
|
|
return nextVal = ev; |
2337 |
|
|
} |
2338 |
|
|
|
2339 |
|
|
public final void remove() { |
2340 |
dl |
1.124 |
if (nextVal == null && last == null) |
2341 |
dl |
1.119 |
advance(); |
2342 |
|
|
Node e = last; |
2343 |
|
|
if (e == null) |
2344 |
|
|
throw new IllegalStateException(); |
2345 |
|
|
last = null; |
2346 |
|
|
map.remove(e.key); |
2347 |
|
|
} |
2348 |
|
|
|
2349 |
|
|
public final boolean hasNext() { |
2350 |
|
|
return nextVal != null || advance() != null; |
2351 |
|
|
} |
2352 |
|
|
|
2353 |
|
|
public final boolean hasMoreElements() { return hasNext(); } |
2354 |
|
|
public final void setRawResult(Object x) { } |
2355 |
|
|
public R getRawResult() { return null; } |
2356 |
|
|
public boolean exec() { return true; } |
2357 |
|
|
} |
2358 |
|
|
|
2359 |
|
|
/* ---------------- Public operations -------------- */ |
2360 |
|
|
|
2361 |
|
|
/** |
2362 |
|
|
* Creates a new, empty map with the default initial table size (16). |
2363 |
|
|
*/ |
2364 |
|
|
public ConcurrentHashMap() { |
2365 |
|
|
this.counter = new LongAdder(); |
2366 |
|
|
} |
2367 |
|
|
|
2368 |
|
|
/** |
2369 |
|
|
* Creates a new, empty map with an initial table size |
2370 |
|
|
* accommodating the specified number of elements without the need |
2371 |
|
|
* to dynamically resize. |
2372 |
|
|
* |
2373 |
|
|
* @param initialCapacity The implementation performs internal |
2374 |
|
|
* sizing to accommodate this many elements. |
2375 |
|
|
* @throws IllegalArgumentException if the initial capacity of |
2376 |
|
|
* elements is negative |
2377 |
|
|
*/ |
2378 |
|
|
public ConcurrentHashMap(int initialCapacity) { |
2379 |
|
|
if (initialCapacity < 0) |
2380 |
|
|
throw new IllegalArgumentException(); |
2381 |
|
|
int cap = ((initialCapacity >= (MAXIMUM_CAPACITY >>> 1)) ? |
2382 |
|
|
MAXIMUM_CAPACITY : |
2383 |
|
|
tableSizeFor(initialCapacity + (initialCapacity >>> 1) + 1)); |
2384 |
|
|
this.counter = new LongAdder(); |
2385 |
|
|
this.sizeCtl = cap; |
2386 |
|
|
} |
2387 |
|
|
|
2388 |
|
|
/** |
2389 |
|
|
* Creates a new map with the same mappings as the given map. |
2390 |
|
|
* |
2391 |
|
|
* @param m the map |
2392 |
|
|
*/ |
2393 |
|
|
public ConcurrentHashMap(Map<? extends K, ? extends V> m) { |
2394 |
|
|
this.counter = new LongAdder(); |
2395 |
|
|
this.sizeCtl = DEFAULT_CAPACITY; |
2396 |
|
|
internalPutAll(m); |
2397 |
|
|
} |
2398 |
|
|
|
2399 |
|
|
/** |
2400 |
|
|
* Creates a new, empty map with an initial table size based on |
2401 |
|
|
* the given number of elements ({@code initialCapacity}) and |
2402 |
|
|
* initial table density ({@code loadFactor}). |
2403 |
|
|
* |
2404 |
|
|
* @param initialCapacity the initial capacity. The implementation |
2405 |
|
|
* performs internal sizing to accommodate this many elements, |
2406 |
|
|
* given the specified load factor. |
2407 |
|
|
* @param loadFactor the load factor (table density) for |
2408 |
|
|
* establishing the initial table size |
2409 |
|
|
* @throws IllegalArgumentException if the initial capacity of |
2410 |
|
|
* elements is negative or the load factor is nonpositive |
2411 |
|
|
* |
2412 |
|
|
* @since 1.6 |
2413 |
|
|
*/ |
2414 |
|
|
public ConcurrentHashMap(int initialCapacity, float loadFactor) { |
2415 |
|
|
this(initialCapacity, loadFactor, 1); |
2416 |
|
|
} |
2417 |
|
|
|
2418 |
|
|
/** |
2419 |
|
|
* Creates a new, empty map with an initial table size based on |
2420 |
|
|
* the given number of elements ({@code initialCapacity}), table |
2421 |
|
|
* density ({@code loadFactor}), and number of concurrently |
2422 |
|
|
* updating threads ({@code concurrencyLevel}). |
2423 |
|
|
* |
2424 |
|
|
* @param initialCapacity the initial capacity. The implementation |
2425 |
|
|
* performs internal sizing to accommodate this many elements, |
2426 |
|
|
* given the specified load factor. |
2427 |
|
|
* @param loadFactor the load factor (table density) for |
2428 |
|
|
* establishing the initial table size |
2429 |
|
|
* @param concurrencyLevel the estimated number of concurrently |
2430 |
|
|
* updating threads. The implementation may use this value as |
2431 |
|
|
* a sizing hint. |
2432 |
|
|
* @throws IllegalArgumentException if the initial capacity is |
2433 |
|
|
* negative or the load factor or concurrencyLevel are |
2434 |
|
|
* nonpositive |
2435 |
|
|
*/ |
2436 |
|
|
public ConcurrentHashMap(int initialCapacity, |
2437 |
|
|
float loadFactor, int concurrencyLevel) { |
2438 |
|
|
if (!(loadFactor > 0.0f) || initialCapacity < 0 || concurrencyLevel <= 0) |
2439 |
|
|
throw new IllegalArgumentException(); |
2440 |
|
|
if (initialCapacity < concurrencyLevel) // Use at least as many bins |
2441 |
|
|
initialCapacity = concurrencyLevel; // as estimated threads |
2442 |
|
|
long size = (long)(1.0 + (long)initialCapacity / loadFactor); |
2443 |
|
|
int cap = (size >= (long)MAXIMUM_CAPACITY) ? |
2444 |
|
|
MAXIMUM_CAPACITY : tableSizeFor((int)size); |
2445 |
|
|
this.counter = new LongAdder(); |
2446 |
|
|
this.sizeCtl = cap; |
2447 |
|
|
} |
2448 |
|
|
|
2449 |
|
|
/** |
2450 |
|
|
* {@inheritDoc} |
2451 |
|
|
*/ |
2452 |
|
|
public boolean isEmpty() { |
2453 |
|
|
return counter.sum() <= 0L; // ignore transient negative values |
2454 |
|
|
} |
2455 |
|
|
|
2456 |
|
|
/** |
2457 |
|
|
* {@inheritDoc} |
2458 |
|
|
*/ |
2459 |
|
|
public int size() { |
2460 |
|
|
long n = counter.sum(); |
2461 |
|
|
return ((n < 0L) ? 0 : |
2462 |
|
|
(n > (long)Integer.MAX_VALUE) ? Integer.MAX_VALUE : |
2463 |
|
|
(int)n); |
2464 |
|
|
} |
2465 |
|
|
|
2466 |
|
|
/** |
2467 |
|
|
* Returns the number of mappings. This method should be used |
2468 |
|
|
* instead of {@link #size} because a ConcurrentHashMap may |
2469 |
|
|
* contain more mappings than can be represented as an int. The |
2470 |
|
|
* value returned is a snapshot; the actual count may differ if |
2471 |
dl |
1.127 |
* there are ongoing concurrent insertions or removals. |
2472 |
dl |
1.119 |
* |
2473 |
|
|
* @return the number of mappings |
2474 |
|
|
*/ |
2475 |
|
|
public long mappingCount() { |
2476 |
|
|
long n = counter.sum(); |
2477 |
dl |
1.126 |
return (n < 0L) ? 0L : n; // ignore transient negative values |
2478 |
dl |
1.119 |
} |
2479 |
|
|
|
2480 |
|
|
/** |
2481 |
|
|
* Returns the value to which the specified key is mapped, |
2482 |
|
|
* or {@code null} if this map contains no mapping for the key. |
2483 |
|
|
* |
2484 |
|
|
* <p>More formally, if this map contains a mapping from a key |
2485 |
|
|
* {@code k} to a value {@code v} such that {@code key.equals(k)}, |
2486 |
|
|
* then this method returns {@code v}; otherwise it returns |
2487 |
|
|
* {@code null}. (There can be at most one such mapping.) |
2488 |
|
|
* |
2489 |
|
|
* @throws NullPointerException if the specified key is null |
2490 |
|
|
*/ |
2491 |
|
|
@SuppressWarnings("unchecked") |
2492 |
dl |
1.126 |
public V get(Object key) { |
2493 |
dl |
1.119 |
if (key == null) |
2494 |
|
|
throw new NullPointerException(); |
2495 |
|
|
return (V)internalGet(key); |
2496 |
|
|
} |
2497 |
|
|
|
2498 |
|
|
/** |
2499 |
|
|
* Tests if the specified object is a key in this table. |
2500 |
|
|
* |
2501 |
|
|
* @param key possible key |
2502 |
|
|
* @return {@code true} if and only if the specified object |
2503 |
|
|
* is a key in this table, as determined by the |
2504 |
|
|
* {@code equals} method; {@code false} otherwise |
2505 |
|
|
* @throws NullPointerException if the specified key is null |
2506 |
|
|
*/ |
2507 |
|
|
public boolean containsKey(Object key) { |
2508 |
|
|
if (key == null) |
2509 |
|
|
throw new NullPointerException(); |
2510 |
|
|
return internalGet(key) != null; |
2511 |
|
|
} |
2512 |
|
|
|
2513 |
|
|
/** |
2514 |
|
|
* Returns {@code true} if this map maps one or more keys to the |
2515 |
|
|
* specified value. Note: This method may require a full traversal |
2516 |
|
|
* of the map, and is much slower than method {@code containsKey}. |
2517 |
|
|
* |
2518 |
|
|
* @param value value whose presence in this map is to be tested |
2519 |
|
|
* @return {@code true} if this map maps one or more keys to the |
2520 |
|
|
* specified value |
2521 |
|
|
* @throws NullPointerException if the specified value is null |
2522 |
|
|
*/ |
2523 |
|
|
public boolean containsValue(Object value) { |
2524 |
|
|
if (value == null) |
2525 |
|
|
throw new NullPointerException(); |
2526 |
|
|
Object v; |
2527 |
|
|
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
2528 |
|
|
while ((v = it.advance()) != null) { |
2529 |
|
|
if (v == value || value.equals(v)) |
2530 |
|
|
return true; |
2531 |
|
|
} |
2532 |
|
|
return false; |
2533 |
|
|
} |
2534 |
|
|
|
2535 |
|
|
/** |
2536 |
|
|
* Legacy method testing if some key maps into the specified value |
2537 |
|
|
* in this table. This method is identical in functionality to |
2538 |
|
|
* {@link #containsValue}, and exists solely to ensure |
2539 |
|
|
* full compatibility with class {@link java.util.Hashtable}, |
2540 |
|
|
* which supported this method prior to introduction of the |
2541 |
|
|
* Java Collections framework. |
2542 |
|
|
* |
2543 |
|
|
* @param value a value to search for |
2544 |
|
|
* @return {@code true} if and only if some key maps to the |
2545 |
|
|
* {@code value} argument in this table as |
2546 |
|
|
* determined by the {@code equals} method; |
2547 |
|
|
* {@code false} otherwise |
2548 |
|
|
* @throws NullPointerException if the specified value is null |
2549 |
|
|
*/ |
2550 |
|
|
public boolean contains(Object value) { |
2551 |
|
|
return containsValue(value); |
2552 |
|
|
} |
2553 |
|
|
|
2554 |
|
|
/** |
2555 |
|
|
* Maps the specified key to the specified value in this table. |
2556 |
|
|
* Neither the key nor the value can be null. |
2557 |
|
|
* |
2558 |
|
|
* <p> The value can be retrieved by calling the {@code get} method |
2559 |
|
|
* with a key that is equal to the original key. |
2560 |
|
|
* |
2561 |
|
|
* @param key key with which the specified value is to be associated |
2562 |
|
|
* @param value value to be associated with the specified key |
2563 |
|
|
* @return the previous value associated with {@code key}, or |
2564 |
|
|
* {@code null} if there was no mapping for {@code key} |
2565 |
|
|
* @throws NullPointerException if the specified key or value is null |
2566 |
|
|
*/ |
2567 |
|
|
@SuppressWarnings("unchecked") |
2568 |
dl |
1.126 |
public V put(K key, V value) { |
2569 |
dl |
1.119 |
if (key == null || value == null) |
2570 |
|
|
throw new NullPointerException(); |
2571 |
|
|
return (V)internalPut(key, value); |
2572 |
|
|
} |
2573 |
|
|
|
2574 |
|
|
/** |
2575 |
|
|
* {@inheritDoc} |
2576 |
|
|
* |
2577 |
|
|
* @return the previous value associated with the specified key, |
2578 |
|
|
* or {@code null} if there was no mapping for the key |
2579 |
|
|
* @throws NullPointerException if the specified key or value is null |
2580 |
|
|
*/ |
2581 |
|
|
@SuppressWarnings("unchecked") |
2582 |
dl |
1.126 |
public V putIfAbsent(K key, V value) { |
2583 |
dl |
1.119 |
if (key == null || value == null) |
2584 |
|
|
throw new NullPointerException(); |
2585 |
|
|
return (V)internalPutIfAbsent(key, value); |
2586 |
|
|
} |
2587 |
|
|
|
2588 |
|
|
/** |
2589 |
|
|
* Copies all of the mappings from the specified map to this one. |
2590 |
|
|
* These mappings replace any mappings that this map had for any of the |
2591 |
|
|
* keys currently in the specified map. |
2592 |
|
|
* |
2593 |
|
|
* @param m mappings to be stored in this map |
2594 |
|
|
*/ |
2595 |
|
|
public void putAll(Map<? extends K, ? extends V> m) { |
2596 |
|
|
internalPutAll(m); |
2597 |
|
|
} |
2598 |
|
|
|
2599 |
|
|
/** |
2600 |
|
|
* If the specified key is not already associated with a value, |
2601 |
|
|
* computes its value using the given mappingFunction and enters |
2602 |
|
|
* it into the map unless null. This is equivalent to |
2603 |
|
|
* <pre> {@code |
2604 |
|
|
* if (map.containsKey(key)) |
2605 |
|
|
* return map.get(key); |
2606 |
|
|
* value = mappingFunction.apply(key); |
2607 |
|
|
* if (value != null) |
2608 |
|
|
* map.put(key, value); |
2609 |
|
|
* return value;}</pre> |
2610 |
|
|
* |
2611 |
|
|
* except that the action is performed atomically. If the |
2612 |
|
|
* function returns {@code null} no mapping is recorded. If the |
2613 |
|
|
* function itself throws an (unchecked) exception, the exception |
2614 |
|
|
* is rethrown to its caller, and no mapping is recorded. Some |
2615 |
|
|
* attempted update operations on this map by other threads may be |
2616 |
|
|
* blocked while computation is in progress, so the computation |
2617 |
|
|
* should be short and simple, and must not attempt to update any |
2618 |
|
|
* other mappings of this Map. The most appropriate usage is to |
2619 |
|
|
* construct a new object serving as an initial mapped value, or |
2620 |
|
|
* memoized result, as in: |
2621 |
|
|
* |
2622 |
|
|
* <pre> {@code |
2623 |
|
|
* map.computeIfAbsent(key, new Fun<K, V>() { |
2624 |
|
|
* public V map(K k) { return new Value(f(k)); }});}</pre> |
2625 |
|
|
* |
2626 |
|
|
* @param key key with which the specified value is to be associated |
2627 |
|
|
* @param mappingFunction the function to compute a value |
2628 |
|
|
* @return the current (existing or computed) value associated with |
2629 |
|
|
* the specified key, or null if the computed value is null. |
2630 |
|
|
* @throws NullPointerException if the specified key or mappingFunction |
2631 |
|
|
* is null |
2632 |
|
|
* @throws IllegalStateException if the computation detectably |
2633 |
|
|
* attempts a recursive update to this map that would |
2634 |
|
|
* otherwise never complete |
2635 |
|
|
* @throws RuntimeException or Error if the mappingFunction does so, |
2636 |
|
|
* in which case the mapping is left unestablished |
2637 |
|
|
*/ |
2638 |
|
|
@SuppressWarnings("unchecked") |
2639 |
dl |
1.126 |
public V computeIfAbsent(K key, Fun<? super K, ? extends V> mappingFunction) { |
2640 |
dl |
1.119 |
if (key == null || mappingFunction == null) |
2641 |
|
|
throw new NullPointerException(); |
2642 |
|
|
return (V)internalComputeIfAbsent(key, mappingFunction); |
2643 |
|
|
} |
2644 |
|
|
|
2645 |
|
|
/** |
2646 |
|
|
* If the given key is present, computes a new mapping value given a key and |
2647 |
|
|
* its current mapped value. This is equivalent to |
2648 |
|
|
* <pre> {@code |
2649 |
|
|
* if (map.containsKey(key)) { |
2650 |
|
|
* value = remappingFunction.apply(key, map.get(key)); |
2651 |
|
|
* if (value != null) |
2652 |
|
|
* map.put(key, value); |
2653 |
|
|
* else |
2654 |
|
|
* map.remove(key); |
2655 |
|
|
* } |
2656 |
|
|
* }</pre> |
2657 |
|
|
* |
2658 |
|
|
* except that the action is performed atomically. If the |
2659 |
|
|
* function returns {@code null}, the mapping is removed. If the |
2660 |
|
|
* function itself throws an (unchecked) exception, the exception |
2661 |
|
|
* is rethrown to its caller, and the current mapping is left |
2662 |
|
|
* unchanged. Some attempted update operations on this map by |
2663 |
|
|
* other threads may be blocked while computation is in progress, |
2664 |
|
|
* so the computation should be short and simple, and must not |
2665 |
|
|
* attempt to update any other mappings of this Map. For example, |
2666 |
|
|
* to either create or append new messages to a value mapping: |
2667 |
|
|
* |
2668 |
|
|
* @param key key with which the specified value is to be associated |
2669 |
|
|
* @param remappingFunction the function to compute a value |
2670 |
jsr166 |
1.123 |
* @return the new value associated with the specified key, or null if none |
2671 |
dl |
1.119 |
* @throws NullPointerException if the specified key or remappingFunction |
2672 |
|
|
* is null |
2673 |
|
|
* @throws IllegalStateException if the computation detectably |
2674 |
|
|
* attempts a recursive update to this map that would |
2675 |
|
|
* otherwise never complete |
2676 |
|
|
* @throws RuntimeException or Error if the remappingFunction does so, |
2677 |
|
|
* in which case the mapping is unchanged |
2678 |
|
|
*/ |
2679 |
dl |
1.126 |
@SuppressWarnings("unchecked") |
2680 |
dl |
1.119 |
public V computeIfPresent(K key, BiFun<? super K, ? super V, ? extends V> remappingFunction) { |
2681 |
|
|
if (key == null || remappingFunction == null) |
2682 |
|
|
throw new NullPointerException(); |
2683 |
|
|
return (V)internalCompute(key, true, remappingFunction); |
2684 |
|
|
} |
2685 |
|
|
|
2686 |
|
|
/** |
2687 |
|
|
* Computes a new mapping value given a key and |
2688 |
|
|
* its current mapped value (or {@code null} if there is no current |
2689 |
|
|
* mapping). This is equivalent to |
2690 |
|
|
* <pre> {@code |
2691 |
|
|
* value = remappingFunction.apply(key, map.get(key)); |
2692 |
|
|
* if (value != null) |
2693 |
|
|
* map.put(key, value); |
2694 |
|
|
* else |
2695 |
|
|
* map.remove(key); |
2696 |
|
|
* }</pre> |
2697 |
|
|
* |
2698 |
|
|
* except that the action is performed atomically. If the |
2699 |
|
|
* function returns {@code null}, the mapping is removed. If the |
2700 |
|
|
* function itself throws an (unchecked) exception, the exception |
2701 |
|
|
* is rethrown to its caller, and the current mapping is left |
2702 |
|
|
* unchanged. Some attempted update operations on this map by |
2703 |
|
|
* other threads may be blocked while computation is in progress, |
2704 |
|
|
* so the computation should be short and simple, and must not |
2705 |
|
|
* attempt to update any other mappings of this Map. For example, |
2706 |
|
|
* to either create or append new messages to a value mapping: |
2707 |
|
|
* |
2708 |
|
|
* <pre> {@code |
2709 |
|
|
* Map<Key, String> map = ...; |
2710 |
|
|
* final String msg = ...; |
2711 |
|
|
* map.compute(key, new BiFun<Key, String, String>() { |
2712 |
|
|
* public String apply(Key k, String v) { |
2713 |
|
|
* return (v == null) ? msg : v + msg;});}}</pre> |
2714 |
|
|
* |
2715 |
|
|
* @param key key with which the specified value is to be associated |
2716 |
|
|
* @param remappingFunction the function to compute a value |
2717 |
jsr166 |
1.123 |
* @return the new value associated with the specified key, or null if none |
2718 |
dl |
1.119 |
* @throws NullPointerException if the specified key or remappingFunction |
2719 |
|
|
* is null |
2720 |
|
|
* @throws IllegalStateException if the computation detectably |
2721 |
|
|
* attempts a recursive update to this map that would |
2722 |
|
|
* otherwise never complete |
2723 |
|
|
* @throws RuntimeException or Error if the remappingFunction does so, |
2724 |
|
|
* in which case the mapping is unchanged |
2725 |
|
|
*/ |
2726 |
dl |
1.126 |
@SuppressWarnings("unchecked") |
2727 |
dl |
1.119 |
public V compute(K key, BiFun<? super K, ? super V, ? extends V> remappingFunction) { |
2728 |
|
|
if (key == null || remappingFunction == null) |
2729 |
|
|
throw new NullPointerException(); |
2730 |
|
|
return (V)internalCompute(key, false, remappingFunction); |
2731 |
|
|
} |
2732 |
|
|
|
2733 |
|
|
/** |
2734 |
|
|
* If the specified key is not already associated |
2735 |
|
|
* with a value, associate it with the given value. |
2736 |
|
|
* Otherwise, replace the value with the results of |
2737 |
|
|
* the given remapping function. This is equivalent to: |
2738 |
|
|
* <pre> {@code |
2739 |
|
|
* if (!map.containsKey(key)) |
2740 |
|
|
* map.put(value); |
2741 |
|
|
* else { |
2742 |
|
|
* newValue = remappingFunction.apply(map.get(key), value); |
2743 |
|
|
* if (value != null) |
2744 |
|
|
* map.put(key, value); |
2745 |
|
|
* else |
2746 |
|
|
* map.remove(key); |
2747 |
|
|
* } |
2748 |
|
|
* }</pre> |
2749 |
|
|
* except that the action is performed atomically. If the |
2750 |
|
|
* function returns {@code null}, the mapping is removed. If the |
2751 |
|
|
* function itself throws an (unchecked) exception, the exception |
2752 |
|
|
* is rethrown to its caller, and the current mapping is left |
2753 |
|
|
* unchanged. Some attempted update operations on this map by |
2754 |
|
|
* other threads may be blocked while computation is in progress, |
2755 |
|
|
* so the computation should be short and simple, and must not |
2756 |
|
|
* attempt to update any other mappings of this Map. |
2757 |
|
|
*/ |
2758 |
dl |
1.126 |
@SuppressWarnings("unchecked") |
2759 |
dl |
1.119 |
public V merge(K key, V value, BiFun<? super V, ? super V, ? extends V> remappingFunction) { |
2760 |
|
|
if (key == null || value == null || remappingFunction == null) |
2761 |
|
|
throw new NullPointerException(); |
2762 |
|
|
return (V)internalMerge(key, value, remappingFunction); |
2763 |
|
|
} |
2764 |
|
|
|
2765 |
|
|
/** |
2766 |
|
|
* Removes the key (and its corresponding value) from this map. |
2767 |
|
|
* This method does nothing if the key is not in the map. |
2768 |
|
|
* |
2769 |
|
|
* @param key the key that needs to be removed |
2770 |
|
|
* @return the previous value associated with {@code key}, or |
2771 |
|
|
* {@code null} if there was no mapping for {@code key} |
2772 |
|
|
* @throws NullPointerException if the specified key is null |
2773 |
|
|
*/ |
2774 |
|
|
@SuppressWarnings("unchecked") |
2775 |
|
|
public V remove(Object key) { |
2776 |
|
|
if (key == null) |
2777 |
|
|
throw new NullPointerException(); |
2778 |
|
|
return (V)internalReplace(key, null, null); |
2779 |
|
|
} |
2780 |
|
|
|
2781 |
|
|
/** |
2782 |
|
|
* {@inheritDoc} |
2783 |
|
|
* |
2784 |
|
|
* @throws NullPointerException if the specified key is null |
2785 |
|
|
*/ |
2786 |
|
|
public boolean remove(Object key, Object value) { |
2787 |
|
|
if (key == null) |
2788 |
|
|
throw new NullPointerException(); |
2789 |
|
|
if (value == null) |
2790 |
|
|
return false; |
2791 |
|
|
return internalReplace(key, null, value) != null; |
2792 |
tim |
1.1 |
} |
2793 |
dl |
1.31 |
|
2794 |
|
|
/** |
2795 |
jsr166 |
1.68 |
* {@inheritDoc} |
2796 |
|
|
* |
2797 |
|
|
* @throws NullPointerException if any of the arguments are null |
2798 |
dl |
1.31 |
*/ |
2799 |
|
|
public boolean replace(K key, V oldValue, V newValue) { |
2800 |
dl |
1.119 |
if (key == null || oldValue == null || newValue == null) |
2801 |
dl |
1.31 |
throw new NullPointerException(); |
2802 |
dl |
1.119 |
return internalReplace(key, newValue, oldValue) != null; |
2803 |
dl |
1.32 |
} |
2804 |
|
|
|
2805 |
|
|
/** |
2806 |
jsr166 |
1.68 |
* {@inheritDoc} |
2807 |
|
|
* |
2808 |
|
|
* @return the previous value associated with the specified key, |
2809 |
dl |
1.119 |
* or {@code null} if there was no mapping for the key |
2810 |
jsr166 |
1.68 |
* @throws NullPointerException if the specified key or value is null |
2811 |
dl |
1.32 |
*/ |
2812 |
dl |
1.119 |
@SuppressWarnings("unchecked") |
2813 |
|
|
public V replace(K key, V value) { |
2814 |
|
|
if (key == null || value == null) |
2815 |
dl |
1.32 |
throw new NullPointerException(); |
2816 |
dl |
1.119 |
return (V)internalReplace(key, value, null); |
2817 |
dl |
1.31 |
} |
2818 |
|
|
|
2819 |
tim |
1.1 |
/** |
2820 |
jsr166 |
1.68 |
* Removes all of the mappings from this map. |
2821 |
tim |
1.1 |
*/ |
2822 |
|
|
public void clear() { |
2823 |
dl |
1.119 |
internalClear(); |
2824 |
tim |
1.1 |
} |
2825 |
|
|
|
2826 |
|
|
/** |
2827 |
jsr166 |
1.68 |
* Returns a {@link Set} view of the keys contained in this map. |
2828 |
|
|
* The set is backed by the map, so changes to the map are |
2829 |
|
|
* reflected in the set, and vice-versa. The set supports element |
2830 |
|
|
* removal, which removes the corresponding mapping from this map, |
2831 |
dl |
1.119 |
* via the {@code Iterator.remove}, {@code Set.remove}, |
2832 |
|
|
* {@code removeAll}, {@code retainAll}, and {@code clear} |
2833 |
|
|
* operations. It does not support the {@code add} or |
2834 |
|
|
* {@code addAll} operations. |
2835 |
jsr166 |
1.68 |
* |
2836 |
dl |
1.119 |
* <p>The view's {@code iterator} is a "weakly consistent" iterator |
2837 |
jsr166 |
1.68 |
* that will never throw {@link ConcurrentModificationException}, |
2838 |
dl |
1.14 |
* and guarantees to traverse elements as they existed upon |
2839 |
|
|
* construction of the iterator, and may (but is not guaranteed to) |
2840 |
|
|
* reflect any modifications subsequent to construction. |
2841 |
tim |
1.1 |
*/ |
2842 |
|
|
public Set<K> keySet() { |
2843 |
dl |
1.119 |
KeySet<K,V> ks = keySet; |
2844 |
|
|
return (ks != null) ? ks : (keySet = new KeySet<K,V>(this)); |
2845 |
tim |
1.1 |
} |
2846 |
|
|
|
2847 |
|
|
/** |
2848 |
jsr166 |
1.68 |
* Returns a {@link Collection} view of the values contained in this map. |
2849 |
|
|
* The collection is backed by the map, so changes to the map are |
2850 |
|
|
* reflected in the collection, and vice-versa. The collection |
2851 |
|
|
* supports element removal, which removes the corresponding |
2852 |
dl |
1.119 |
* mapping from this map, via the {@code Iterator.remove}, |
2853 |
|
|
* {@code Collection.remove}, {@code removeAll}, |
2854 |
|
|
* {@code retainAll}, and {@code clear} operations. It does not |
2855 |
|
|
* support the {@code add} or {@code addAll} operations. |
2856 |
jsr166 |
1.68 |
* |
2857 |
dl |
1.119 |
* <p>The view's {@code iterator} is a "weakly consistent" iterator |
2858 |
jsr166 |
1.68 |
* that will never throw {@link ConcurrentModificationException}, |
2859 |
dl |
1.14 |
* and guarantees to traverse elements as they existed upon |
2860 |
|
|
* construction of the iterator, and may (but is not guaranteed to) |
2861 |
|
|
* reflect any modifications subsequent to construction. |
2862 |
tim |
1.1 |
*/ |
2863 |
dl |
1.119 |
public Collection<V> values() { |
2864 |
|
|
Values<K,V> vs = values; |
2865 |
|
|
return (vs != null) ? vs : (values = new Values<K,V>(this)); |
2866 |
|
|
} |
2867 |
|
|
|
2868 |
|
|
/** |
2869 |
|
|
* Returns a {@link Set} view of the mappings contained in this map. |
2870 |
|
|
* The set is backed by the map, so changes to the map are |
2871 |
|
|
* reflected in the set, and vice-versa. The set supports element |
2872 |
|
|
* removal, which removes the corresponding mapping from the map, |
2873 |
|
|
* via the {@code Iterator.remove}, {@code Set.remove}, |
2874 |
|
|
* {@code removeAll}, {@code retainAll}, and {@code clear} |
2875 |
|
|
* operations. It does not support the {@code add} or |
2876 |
|
|
* {@code addAll} operations. |
2877 |
|
|
* |
2878 |
|
|
* <p>The view's {@code iterator} is a "weakly consistent" iterator |
2879 |
|
|
* that will never throw {@link ConcurrentModificationException}, |
2880 |
|
|
* and guarantees to traverse elements as they existed upon |
2881 |
|
|
* construction of the iterator, and may (but is not guaranteed to) |
2882 |
|
|
* reflect any modifications subsequent to construction. |
2883 |
|
|
*/ |
2884 |
|
|
public Set<Map.Entry<K,V>> entrySet() { |
2885 |
|
|
EntrySet<K,V> es = entrySet; |
2886 |
|
|
return (es != null) ? es : (entrySet = new EntrySet<K,V>(this)); |
2887 |
|
|
} |
2888 |
|
|
|
2889 |
|
|
/** |
2890 |
|
|
* Returns an enumeration of the keys in this table. |
2891 |
|
|
* |
2892 |
|
|
* @return an enumeration of the keys in this table |
2893 |
|
|
* @see #keySet() |
2894 |
|
|
*/ |
2895 |
|
|
public Enumeration<K> keys() { |
2896 |
|
|
return new KeyIterator<K,V>(this); |
2897 |
|
|
} |
2898 |
|
|
|
2899 |
|
|
/** |
2900 |
|
|
* Returns an enumeration of the values in this table. |
2901 |
|
|
* |
2902 |
|
|
* @return an enumeration of the values in this table |
2903 |
|
|
* @see #values() |
2904 |
|
|
*/ |
2905 |
|
|
public Enumeration<V> elements() { |
2906 |
|
|
return new ValueIterator<K,V>(this); |
2907 |
|
|
} |
2908 |
|
|
|
2909 |
|
|
/** |
2910 |
jsr166 |
1.122 |
* Returns a partitionable iterator of the keys in this map. |
2911 |
dl |
1.119 |
* |
2912 |
jsr166 |
1.122 |
* @return a partitionable iterator of the keys in this map |
2913 |
dl |
1.119 |
*/ |
2914 |
|
|
public Spliterator<K> keySpliterator() { |
2915 |
|
|
return new KeyIterator<K,V>(this); |
2916 |
|
|
} |
2917 |
|
|
|
2918 |
|
|
/** |
2919 |
jsr166 |
1.122 |
* Returns a partitionable iterator of the values in this map. |
2920 |
dl |
1.119 |
* |
2921 |
jsr166 |
1.122 |
* @return a partitionable iterator of the values in this map |
2922 |
dl |
1.119 |
*/ |
2923 |
|
|
public Spliterator<V> valueSpliterator() { |
2924 |
|
|
return new ValueIterator<K,V>(this); |
2925 |
|
|
} |
2926 |
|
|
|
2927 |
|
|
/** |
2928 |
jsr166 |
1.122 |
* Returns a partitionable iterator of the entries in this map. |
2929 |
dl |
1.119 |
* |
2930 |
jsr166 |
1.122 |
* @return a partitionable iterator of the entries in this map |
2931 |
dl |
1.119 |
*/ |
2932 |
|
|
public Spliterator<Map.Entry<K,V>> entrySpliterator() { |
2933 |
|
|
return new EntryIterator<K,V>(this); |
2934 |
|
|
} |
2935 |
|
|
|
2936 |
|
|
/** |
2937 |
|
|
* Returns the hash code value for this {@link Map}, i.e., |
2938 |
|
|
* the sum of, for each key-value pair in the map, |
2939 |
|
|
* {@code key.hashCode() ^ value.hashCode()}. |
2940 |
|
|
* |
2941 |
|
|
* @return the hash code value for this map |
2942 |
|
|
*/ |
2943 |
|
|
public int hashCode() { |
2944 |
|
|
int h = 0; |
2945 |
|
|
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
2946 |
|
|
Object v; |
2947 |
|
|
while ((v = it.advance()) != null) { |
2948 |
|
|
h += it.nextKey.hashCode() ^ v.hashCode(); |
2949 |
|
|
} |
2950 |
|
|
return h; |
2951 |
|
|
} |
2952 |
|
|
|
2953 |
|
|
/** |
2954 |
|
|
* Returns a string representation of this map. The string |
2955 |
|
|
* representation consists of a list of key-value mappings (in no |
2956 |
|
|
* particular order) enclosed in braces ("{@code {}}"). Adjacent |
2957 |
|
|
* mappings are separated by the characters {@code ", "} (comma |
2958 |
|
|
* and space). Each key-value mapping is rendered as the key |
2959 |
|
|
* followed by an equals sign ("{@code =}") followed by the |
2960 |
|
|
* associated value. |
2961 |
|
|
* |
2962 |
|
|
* @return a string representation of this map |
2963 |
|
|
*/ |
2964 |
|
|
public String toString() { |
2965 |
|
|
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
2966 |
|
|
StringBuilder sb = new StringBuilder(); |
2967 |
|
|
sb.append('{'); |
2968 |
|
|
Object v; |
2969 |
|
|
if ((v = it.advance()) != null) { |
2970 |
|
|
for (;;) { |
2971 |
|
|
Object k = it.nextKey; |
2972 |
|
|
sb.append(k == this ? "(this Map)" : k); |
2973 |
|
|
sb.append('='); |
2974 |
|
|
sb.append(v == this ? "(this Map)" : v); |
2975 |
|
|
if ((v = it.advance()) == null) |
2976 |
|
|
break; |
2977 |
|
|
sb.append(',').append(' '); |
2978 |
|
|
} |
2979 |
|
|
} |
2980 |
|
|
return sb.append('}').toString(); |
2981 |
|
|
} |
2982 |
|
|
|
2983 |
|
|
/** |
2984 |
|
|
* Compares the specified object with this map for equality. |
2985 |
|
|
* Returns {@code true} if the given object is a map with the same |
2986 |
|
|
* mappings as this map. This operation may return misleading |
2987 |
|
|
* results if either map is concurrently modified during execution |
2988 |
|
|
* of this method. |
2989 |
|
|
* |
2990 |
|
|
* @param o object to be compared for equality with this map |
2991 |
|
|
* @return {@code true} if the specified object is equal to this map |
2992 |
|
|
*/ |
2993 |
|
|
public boolean equals(Object o) { |
2994 |
|
|
if (o != this) { |
2995 |
|
|
if (!(o instanceof Map)) |
2996 |
|
|
return false; |
2997 |
|
|
Map<?,?> m = (Map<?,?>) o; |
2998 |
|
|
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
2999 |
|
|
Object val; |
3000 |
|
|
while ((val = it.advance()) != null) { |
3001 |
|
|
Object v = m.get(it.nextKey); |
3002 |
|
|
if (v == null || (v != val && !v.equals(val))) |
3003 |
|
|
return false; |
3004 |
|
|
} |
3005 |
|
|
for (Map.Entry<?,?> e : m.entrySet()) { |
3006 |
|
|
Object mk, mv, v; |
3007 |
|
|
if ((mk = e.getKey()) == null || |
3008 |
|
|
(mv = e.getValue()) == null || |
3009 |
|
|
(v = internalGet(mk)) == null || |
3010 |
|
|
(mv != v && !mv.equals(v))) |
3011 |
|
|
return false; |
3012 |
|
|
} |
3013 |
|
|
} |
3014 |
|
|
return true; |
3015 |
|
|
} |
3016 |
|
|
|
3017 |
|
|
/* ----------------Iterators -------------- */ |
3018 |
|
|
|
3019 |
dl |
1.126 |
@SuppressWarnings("serial") |
3020 |
dl |
1.119 |
static final class KeyIterator<K,V> extends Traverser<K,V,Object> |
3021 |
|
|
implements Spliterator<K>, Enumeration<K> { |
3022 |
|
|
KeyIterator(ConcurrentHashMap<K, V> map) { super(map); } |
3023 |
|
|
KeyIterator(Traverser<K,V,Object> it, boolean split) { |
3024 |
|
|
super(it, split); |
3025 |
|
|
} |
3026 |
|
|
public KeyIterator<K,V> split() { |
3027 |
|
|
if (last != null || (next != null && nextVal == null)) |
3028 |
|
|
throw new IllegalStateException(); |
3029 |
|
|
return new KeyIterator<K,V>(this, true); |
3030 |
|
|
} |
3031 |
|
|
@SuppressWarnings("unchecked") |
3032 |
|
|
public final K next() { |
3033 |
|
|
if (nextVal == null && advance() == null) |
3034 |
|
|
throw new NoSuchElementException(); |
3035 |
|
|
Object k = nextKey; |
3036 |
|
|
nextVal = null; |
3037 |
|
|
return (K) k; |
3038 |
|
|
} |
3039 |
|
|
|
3040 |
|
|
public final K nextElement() { return next(); } |
3041 |
|
|
} |
3042 |
|
|
|
3043 |
dl |
1.126 |
@SuppressWarnings("serial") |
3044 |
dl |
1.119 |
static final class ValueIterator<K,V> extends Traverser<K,V,Object> |
3045 |
|
|
implements Spliterator<V>, Enumeration<V> { |
3046 |
|
|
ValueIterator(ConcurrentHashMap<K, V> map) { super(map); } |
3047 |
|
|
ValueIterator(Traverser<K,V,Object> it, boolean split) { |
3048 |
|
|
super(it, split); |
3049 |
|
|
} |
3050 |
|
|
public ValueIterator<K,V> split() { |
3051 |
|
|
if (last != null || (next != null && nextVal == null)) |
3052 |
|
|
throw new IllegalStateException(); |
3053 |
|
|
return new ValueIterator<K,V>(this, true); |
3054 |
|
|
} |
3055 |
|
|
|
3056 |
|
|
@SuppressWarnings("unchecked") |
3057 |
|
|
public final V next() { |
3058 |
|
|
Object v; |
3059 |
|
|
if ((v = nextVal) == null && (v = advance()) == null) |
3060 |
|
|
throw new NoSuchElementException(); |
3061 |
|
|
nextVal = null; |
3062 |
|
|
return (V) v; |
3063 |
|
|
} |
3064 |
|
|
|
3065 |
|
|
public final V nextElement() { return next(); } |
3066 |
|
|
} |
3067 |
|
|
|
3068 |
dl |
1.126 |
@SuppressWarnings("serial") |
3069 |
dl |
1.119 |
static final class EntryIterator<K,V> extends Traverser<K,V,Object> |
3070 |
|
|
implements Spliterator<Map.Entry<K,V>> { |
3071 |
|
|
EntryIterator(ConcurrentHashMap<K, V> map) { super(map); } |
3072 |
|
|
EntryIterator(Traverser<K,V,Object> it, boolean split) { |
3073 |
|
|
super(it, split); |
3074 |
|
|
} |
3075 |
|
|
public EntryIterator<K,V> split() { |
3076 |
|
|
if (last != null || (next != null && nextVal == null)) |
3077 |
|
|
throw new IllegalStateException(); |
3078 |
|
|
return new EntryIterator<K,V>(this, true); |
3079 |
|
|
} |
3080 |
|
|
|
3081 |
|
|
@SuppressWarnings("unchecked") |
3082 |
|
|
public final Map.Entry<K,V> next() { |
3083 |
|
|
Object v; |
3084 |
|
|
if ((v = nextVal) == null && (v = advance()) == null) |
3085 |
|
|
throw new NoSuchElementException(); |
3086 |
|
|
Object k = nextKey; |
3087 |
|
|
nextVal = null; |
3088 |
|
|
return new MapEntry<K,V>((K)k, (V)v, map); |
3089 |
|
|
} |
3090 |
|
|
} |
3091 |
|
|
|
3092 |
|
|
/** |
3093 |
|
|
* Exported Entry for iterators |
3094 |
|
|
*/ |
3095 |
|
|
static final class MapEntry<K,V> implements Map.Entry<K, V> { |
3096 |
|
|
final K key; // non-null |
3097 |
|
|
V val; // non-null |
3098 |
|
|
final ConcurrentHashMap<K, V> map; |
3099 |
|
|
MapEntry(K key, V val, ConcurrentHashMap<K, V> map) { |
3100 |
|
|
this.key = key; |
3101 |
|
|
this.val = val; |
3102 |
|
|
this.map = map; |
3103 |
|
|
} |
3104 |
|
|
public final K getKey() { return key; } |
3105 |
|
|
public final V getValue() { return val; } |
3106 |
|
|
public final int hashCode() { return key.hashCode() ^ val.hashCode(); } |
3107 |
|
|
public final String toString(){ return key + "=" + val; } |
3108 |
|
|
|
3109 |
|
|
public final boolean equals(Object o) { |
3110 |
|
|
Object k, v; Map.Entry<?,?> e; |
3111 |
|
|
return ((o instanceof Map.Entry) && |
3112 |
|
|
(k = (e = (Map.Entry<?,?>)o).getKey()) != null && |
3113 |
|
|
(v = e.getValue()) != null && |
3114 |
|
|
(k == key || k.equals(key)) && |
3115 |
|
|
(v == val || v.equals(val))); |
3116 |
|
|
} |
3117 |
|
|
|
3118 |
|
|
/** |
3119 |
|
|
* Sets our entry's value and writes through to the map. The |
3120 |
|
|
* value to return is somewhat arbitrary here. Since we do not |
3121 |
|
|
* necessarily track asynchronous changes, the most recent |
3122 |
|
|
* "previous" value could be different from what we return (or |
3123 |
|
|
* could even have been removed in which case the put will |
3124 |
|
|
* re-establish). We do not and cannot guarantee more. |
3125 |
|
|
*/ |
3126 |
|
|
public final V setValue(V value) { |
3127 |
|
|
if (value == null) throw new NullPointerException(); |
3128 |
|
|
V v = val; |
3129 |
|
|
val = value; |
3130 |
|
|
map.put(key, value); |
3131 |
|
|
return v; |
3132 |
|
|
} |
3133 |
|
|
} |
3134 |
|
|
|
3135 |
|
|
/* ----------------Views -------------- */ |
3136 |
|
|
|
3137 |
|
|
/** |
3138 |
|
|
* Base class for views. |
3139 |
|
|
*/ |
3140 |
|
|
static abstract class CHMView<K, V> { |
3141 |
|
|
final ConcurrentHashMap<K, V> map; |
3142 |
|
|
CHMView(ConcurrentHashMap<K, V> map) { this.map = map; } |
3143 |
|
|
public final int size() { return map.size(); } |
3144 |
|
|
public final boolean isEmpty() { return map.isEmpty(); } |
3145 |
|
|
public final void clear() { map.clear(); } |
3146 |
|
|
|
3147 |
|
|
// implementations below rely on concrete classes supplying these |
3148 |
|
|
abstract public Iterator<?> iterator(); |
3149 |
|
|
abstract public boolean contains(Object o); |
3150 |
|
|
abstract public boolean remove(Object o); |
3151 |
|
|
|
3152 |
|
|
private static final String oomeMsg = "Required array size too large"; |
3153 |
|
|
|
3154 |
|
|
public final Object[] toArray() { |
3155 |
|
|
long sz = map.mappingCount(); |
3156 |
|
|
if (sz > (long)(MAX_ARRAY_SIZE)) |
3157 |
|
|
throw new OutOfMemoryError(oomeMsg); |
3158 |
|
|
int n = (int)sz; |
3159 |
|
|
Object[] r = new Object[n]; |
3160 |
|
|
int i = 0; |
3161 |
|
|
Iterator<?> it = iterator(); |
3162 |
|
|
while (it.hasNext()) { |
3163 |
|
|
if (i == n) { |
3164 |
|
|
if (n >= MAX_ARRAY_SIZE) |
3165 |
|
|
throw new OutOfMemoryError(oomeMsg); |
3166 |
|
|
if (n >= MAX_ARRAY_SIZE - (MAX_ARRAY_SIZE >>> 1) - 1) |
3167 |
|
|
n = MAX_ARRAY_SIZE; |
3168 |
|
|
else |
3169 |
|
|
n += (n >>> 1) + 1; |
3170 |
|
|
r = Arrays.copyOf(r, n); |
3171 |
|
|
} |
3172 |
|
|
r[i++] = it.next(); |
3173 |
|
|
} |
3174 |
|
|
return (i == n) ? r : Arrays.copyOf(r, i); |
3175 |
|
|
} |
3176 |
|
|
|
3177 |
|
|
@SuppressWarnings("unchecked") |
3178 |
|
|
public final <T> T[] toArray(T[] a) { |
3179 |
|
|
long sz = map.mappingCount(); |
3180 |
|
|
if (sz > (long)(MAX_ARRAY_SIZE)) |
3181 |
|
|
throw new OutOfMemoryError(oomeMsg); |
3182 |
|
|
int m = (int)sz; |
3183 |
|
|
T[] r = (a.length >= m) ? a : |
3184 |
|
|
(T[])java.lang.reflect.Array |
3185 |
|
|
.newInstance(a.getClass().getComponentType(), m); |
3186 |
|
|
int n = r.length; |
3187 |
|
|
int i = 0; |
3188 |
|
|
Iterator<?> it = iterator(); |
3189 |
|
|
while (it.hasNext()) { |
3190 |
|
|
if (i == n) { |
3191 |
|
|
if (n >= MAX_ARRAY_SIZE) |
3192 |
|
|
throw new OutOfMemoryError(oomeMsg); |
3193 |
|
|
if (n >= MAX_ARRAY_SIZE - (MAX_ARRAY_SIZE >>> 1) - 1) |
3194 |
|
|
n = MAX_ARRAY_SIZE; |
3195 |
|
|
else |
3196 |
|
|
n += (n >>> 1) + 1; |
3197 |
|
|
r = Arrays.copyOf(r, n); |
3198 |
|
|
} |
3199 |
|
|
r[i++] = (T)it.next(); |
3200 |
|
|
} |
3201 |
|
|
if (a == r && i < n) { |
3202 |
|
|
r[i] = null; // null-terminate |
3203 |
|
|
return r; |
3204 |
|
|
} |
3205 |
|
|
return (i == n) ? r : Arrays.copyOf(r, i); |
3206 |
|
|
} |
3207 |
|
|
|
3208 |
|
|
public final int hashCode() { |
3209 |
|
|
int h = 0; |
3210 |
|
|
for (Iterator<?> it = iterator(); it.hasNext();) |
3211 |
|
|
h += it.next().hashCode(); |
3212 |
|
|
return h; |
3213 |
|
|
} |
3214 |
|
|
|
3215 |
|
|
public final String toString() { |
3216 |
|
|
StringBuilder sb = new StringBuilder(); |
3217 |
|
|
sb.append('['); |
3218 |
|
|
Iterator<?> it = iterator(); |
3219 |
|
|
if (it.hasNext()) { |
3220 |
|
|
for (;;) { |
3221 |
|
|
Object e = it.next(); |
3222 |
|
|
sb.append(e == this ? "(this Collection)" : e); |
3223 |
|
|
if (!it.hasNext()) |
3224 |
|
|
break; |
3225 |
|
|
sb.append(',').append(' '); |
3226 |
|
|
} |
3227 |
|
|
} |
3228 |
|
|
return sb.append(']').toString(); |
3229 |
|
|
} |
3230 |
|
|
|
3231 |
|
|
public final boolean containsAll(Collection<?> c) { |
3232 |
|
|
if (c != this) { |
3233 |
|
|
for (Iterator<?> it = c.iterator(); it.hasNext();) { |
3234 |
|
|
Object e = it.next(); |
3235 |
|
|
if (e == null || !contains(e)) |
3236 |
|
|
return false; |
3237 |
|
|
} |
3238 |
|
|
} |
3239 |
|
|
return true; |
3240 |
|
|
} |
3241 |
|
|
|
3242 |
|
|
public final boolean removeAll(Collection<?> c) { |
3243 |
|
|
boolean modified = false; |
3244 |
|
|
for (Iterator<?> it = iterator(); it.hasNext();) { |
3245 |
|
|
if (c.contains(it.next())) { |
3246 |
|
|
it.remove(); |
3247 |
|
|
modified = true; |
3248 |
|
|
} |
3249 |
|
|
} |
3250 |
|
|
return modified; |
3251 |
|
|
} |
3252 |
|
|
|
3253 |
|
|
public final boolean retainAll(Collection<?> c) { |
3254 |
|
|
boolean modified = false; |
3255 |
|
|
for (Iterator<?> it = iterator(); it.hasNext();) { |
3256 |
|
|
if (!c.contains(it.next())) { |
3257 |
|
|
it.remove(); |
3258 |
|
|
modified = true; |
3259 |
|
|
} |
3260 |
|
|
} |
3261 |
|
|
return modified; |
3262 |
|
|
} |
3263 |
|
|
|
3264 |
|
|
} |
3265 |
|
|
|
3266 |
|
|
static final class KeySet<K,V> extends CHMView<K,V> implements Set<K> { |
3267 |
|
|
KeySet(ConcurrentHashMap<K, V> map) { |
3268 |
|
|
super(map); |
3269 |
|
|
} |
3270 |
|
|
public final boolean contains(Object o) { return map.containsKey(o); } |
3271 |
|
|
public final boolean remove(Object o) { return map.remove(o) != null; } |
3272 |
|
|
public final Iterator<K> iterator() { |
3273 |
|
|
return new KeyIterator<K,V>(map); |
3274 |
|
|
} |
3275 |
|
|
public final boolean add(K e) { |
3276 |
|
|
throw new UnsupportedOperationException(); |
3277 |
|
|
} |
3278 |
|
|
public final boolean addAll(Collection<? extends K> c) { |
3279 |
|
|
throw new UnsupportedOperationException(); |
3280 |
|
|
} |
3281 |
|
|
public boolean equals(Object o) { |
3282 |
|
|
Set<?> c; |
3283 |
|
|
return ((o instanceof Set) && |
3284 |
|
|
((c = (Set<?>)o) == this || |
3285 |
|
|
(containsAll(c) && c.containsAll(this)))); |
3286 |
|
|
} |
3287 |
|
|
} |
3288 |
|
|
|
3289 |
|
|
|
3290 |
|
|
static final class Values<K,V> extends CHMView<K,V> |
3291 |
|
|
implements Collection<V> { |
3292 |
|
|
Values(ConcurrentHashMap<K, V> map) { super(map); } |
3293 |
|
|
public final boolean contains(Object o) { return map.containsValue(o); } |
3294 |
|
|
public final boolean remove(Object o) { |
3295 |
|
|
if (o != null) { |
3296 |
|
|
Iterator<V> it = new ValueIterator<K,V>(map); |
3297 |
|
|
while (it.hasNext()) { |
3298 |
|
|
if (o.equals(it.next())) { |
3299 |
|
|
it.remove(); |
3300 |
|
|
return true; |
3301 |
|
|
} |
3302 |
|
|
} |
3303 |
|
|
} |
3304 |
|
|
return false; |
3305 |
|
|
} |
3306 |
|
|
public final Iterator<V> iterator() { |
3307 |
|
|
return new ValueIterator<K,V>(map); |
3308 |
|
|
} |
3309 |
|
|
public final boolean add(V e) { |
3310 |
|
|
throw new UnsupportedOperationException(); |
3311 |
|
|
} |
3312 |
|
|
public final boolean addAll(Collection<? extends V> c) { |
3313 |
|
|
throw new UnsupportedOperationException(); |
3314 |
|
|
} |
3315 |
|
|
|
3316 |
|
|
} |
3317 |
|
|
|
3318 |
|
|
static final class EntrySet<K,V> extends CHMView<K,V> |
3319 |
|
|
implements Set<Map.Entry<K,V>> { |
3320 |
|
|
EntrySet(ConcurrentHashMap<K, V> map) { super(map); } |
3321 |
|
|
public final boolean contains(Object o) { |
3322 |
|
|
Object k, v, r; Map.Entry<?,?> e; |
3323 |
|
|
return ((o instanceof Map.Entry) && |
3324 |
|
|
(k = (e = (Map.Entry<?,?>)o).getKey()) != null && |
3325 |
|
|
(r = map.get(k)) != null && |
3326 |
|
|
(v = e.getValue()) != null && |
3327 |
|
|
(v == r || v.equals(r))); |
3328 |
|
|
} |
3329 |
|
|
public final boolean remove(Object o) { |
3330 |
|
|
Object k, v; Map.Entry<?,?> e; |
3331 |
|
|
return ((o instanceof Map.Entry) && |
3332 |
|
|
(k = (e = (Map.Entry<?,?>)o).getKey()) != null && |
3333 |
|
|
(v = e.getValue()) != null && |
3334 |
|
|
map.remove(k, v)); |
3335 |
|
|
} |
3336 |
|
|
public final Iterator<Map.Entry<K,V>> iterator() { |
3337 |
|
|
return new EntryIterator<K,V>(map); |
3338 |
|
|
} |
3339 |
|
|
public final boolean add(Entry<K,V> e) { |
3340 |
|
|
throw new UnsupportedOperationException(); |
3341 |
|
|
} |
3342 |
|
|
public final boolean addAll(Collection<? extends Entry<K,V>> c) { |
3343 |
|
|
throw new UnsupportedOperationException(); |
3344 |
|
|
} |
3345 |
|
|
public boolean equals(Object o) { |
3346 |
|
|
Set<?> c; |
3347 |
|
|
return ((o instanceof Set) && |
3348 |
|
|
((c = (Set<?>)o) == this || |
3349 |
|
|
(containsAll(c) && c.containsAll(this)))); |
3350 |
|
|
} |
3351 |
|
|
} |
3352 |
|
|
|
3353 |
|
|
/* ---------------- Serialization Support -------------- */ |
3354 |
|
|
|
3355 |
|
|
/** |
3356 |
|
|
* Stripped-down version of helper class used in previous version, |
3357 |
|
|
* declared for the sake of serialization compatibility |
3358 |
|
|
*/ |
3359 |
|
|
static class Segment<K,V> implements Serializable { |
3360 |
|
|
private static final long serialVersionUID = 2249069246763182397L; |
3361 |
|
|
final float loadFactor; |
3362 |
|
|
Segment(float lf) { this.loadFactor = lf; } |
3363 |
|
|
} |
3364 |
|
|
|
3365 |
|
|
/** |
3366 |
|
|
* Saves the state of the {@code ConcurrentHashMap} instance to a |
3367 |
|
|
* stream (i.e., serializes it). |
3368 |
|
|
* @param s the stream |
3369 |
|
|
* @serialData |
3370 |
|
|
* the key (Object) and value (Object) |
3371 |
|
|
* for each key-value mapping, followed by a null pair. |
3372 |
|
|
* The key-value mappings are emitted in no particular order. |
3373 |
|
|
*/ |
3374 |
|
|
@SuppressWarnings("unchecked") |
3375 |
|
|
private void writeObject(java.io.ObjectOutputStream s) |
3376 |
|
|
throws java.io.IOException { |
3377 |
|
|
if (segments == null) { // for serialization compatibility |
3378 |
|
|
segments = (Segment<K,V>[]) |
3379 |
|
|
new Segment<?,?>[DEFAULT_CONCURRENCY_LEVEL]; |
3380 |
|
|
for (int i = 0; i < segments.length; ++i) |
3381 |
|
|
segments[i] = new Segment<K,V>(LOAD_FACTOR); |
3382 |
|
|
} |
3383 |
|
|
s.defaultWriteObject(); |
3384 |
|
|
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3385 |
|
|
Object v; |
3386 |
|
|
while ((v = it.advance()) != null) { |
3387 |
|
|
s.writeObject(it.nextKey); |
3388 |
|
|
s.writeObject(v); |
3389 |
|
|
} |
3390 |
|
|
s.writeObject(null); |
3391 |
|
|
s.writeObject(null); |
3392 |
|
|
segments = null; // throw away |
3393 |
|
|
} |
3394 |
|
|
|
3395 |
|
|
/** |
3396 |
|
|
* Reconstitutes the instance from a stream (that is, deserializes it). |
3397 |
|
|
* @param s the stream |
3398 |
|
|
*/ |
3399 |
|
|
@SuppressWarnings("unchecked") |
3400 |
|
|
private void readObject(java.io.ObjectInputStream s) |
3401 |
|
|
throws java.io.IOException, ClassNotFoundException { |
3402 |
|
|
s.defaultReadObject(); |
3403 |
|
|
this.segments = null; // unneeded |
3404 |
|
|
// initialize transient final field |
3405 |
|
|
UNSAFE.putObjectVolatile(this, counterOffset, new LongAdder()); |
3406 |
|
|
|
3407 |
|
|
// Create all nodes, then place in table once size is known |
3408 |
|
|
long size = 0L; |
3409 |
|
|
Node p = null; |
3410 |
|
|
for (;;) { |
3411 |
|
|
K k = (K) s.readObject(); |
3412 |
|
|
V v = (V) s.readObject(); |
3413 |
|
|
if (k != null && v != null) { |
3414 |
|
|
int h = spread(k.hashCode()); |
3415 |
|
|
p = new Node(h, k, v, p); |
3416 |
|
|
++size; |
3417 |
|
|
} |
3418 |
|
|
else |
3419 |
|
|
break; |
3420 |
|
|
} |
3421 |
|
|
if (p != null) { |
3422 |
|
|
boolean init = false; |
3423 |
|
|
int n; |
3424 |
|
|
if (size >= (long)(MAXIMUM_CAPACITY >>> 1)) |
3425 |
|
|
n = MAXIMUM_CAPACITY; |
3426 |
|
|
else { |
3427 |
|
|
int sz = (int)size; |
3428 |
|
|
n = tableSizeFor(sz + (sz >>> 1) + 1); |
3429 |
|
|
} |
3430 |
|
|
int sc = sizeCtl; |
3431 |
|
|
boolean collide = false; |
3432 |
|
|
if (n > sc && |
3433 |
|
|
UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) { |
3434 |
|
|
try { |
3435 |
|
|
if (table == null) { |
3436 |
|
|
init = true; |
3437 |
|
|
Node[] tab = new Node[n]; |
3438 |
|
|
int mask = n - 1; |
3439 |
|
|
while (p != null) { |
3440 |
|
|
int j = p.hash & mask; |
3441 |
|
|
Node next = p.next; |
3442 |
|
|
Node q = p.next = tabAt(tab, j); |
3443 |
|
|
setTabAt(tab, j, p); |
3444 |
|
|
if (!collide && q != null && q.hash == p.hash) |
3445 |
|
|
collide = true; |
3446 |
|
|
p = next; |
3447 |
|
|
} |
3448 |
|
|
table = tab; |
3449 |
|
|
counter.add(size); |
3450 |
|
|
sc = n - (n >>> 2); |
3451 |
|
|
} |
3452 |
|
|
} finally { |
3453 |
|
|
sizeCtl = sc; |
3454 |
|
|
} |
3455 |
|
|
if (collide) { // rescan and convert to TreeBins |
3456 |
|
|
Node[] tab = table; |
3457 |
|
|
for (int i = 0; i < tab.length; ++i) { |
3458 |
|
|
int c = 0; |
3459 |
|
|
for (Node e = tabAt(tab, i); e != null; e = e.next) { |
3460 |
|
|
if (++c > TREE_THRESHOLD && |
3461 |
|
|
(e.key instanceof Comparable)) { |
3462 |
|
|
replaceWithTreeBin(tab, i, e.key); |
3463 |
|
|
break; |
3464 |
|
|
} |
3465 |
|
|
} |
3466 |
|
|
} |
3467 |
|
|
} |
3468 |
|
|
} |
3469 |
|
|
if (!init) { // Can only happen if unsafely published. |
3470 |
|
|
while (p != null) { |
3471 |
|
|
internalPut(p.key, p.val); |
3472 |
|
|
p = p.next; |
3473 |
|
|
} |
3474 |
|
|
} |
3475 |
|
|
} |
3476 |
|
|
} |
3477 |
|
|
|
3478 |
|
|
|
3479 |
|
|
// ------------------------------------------------------- |
3480 |
|
|
|
3481 |
|
|
// Sams |
3482 |
|
|
/** Interface describing a void action of one argument */ |
3483 |
|
|
public interface Action<A> { void apply(A a); } |
3484 |
|
|
/** Interface describing a void action of two arguments */ |
3485 |
|
|
public interface BiAction<A,B> { void apply(A a, B b); } |
3486 |
|
|
/** Interface describing a function of one argument */ |
3487 |
|
|
public interface Fun<A,T> { T apply(A a); } |
3488 |
|
|
/** Interface describing a function of two arguments */ |
3489 |
|
|
public interface BiFun<A,B,T> { T apply(A a, B b); } |
3490 |
|
|
/** Interface describing a function of no arguments */ |
3491 |
|
|
public interface Generator<T> { T apply(); } |
3492 |
|
|
/** Interface describing a function mapping its argument to a double */ |
3493 |
|
|
public interface ObjectToDouble<A> { double apply(A a); } |
3494 |
|
|
/** Interface describing a function mapping its argument to a long */ |
3495 |
|
|
public interface ObjectToLong<A> { long apply(A a); } |
3496 |
|
|
/** Interface describing a function mapping its argument to an int */ |
3497 |
|
|
public interface ObjectToInt<A> {int apply(A a); } |
3498 |
|
|
/** Interface describing a function mapping two arguments to a double */ |
3499 |
|
|
public interface ObjectByObjectToDouble<A,B> { double apply(A a, B b); } |
3500 |
|
|
/** Interface describing a function mapping two arguments to a long */ |
3501 |
|
|
public interface ObjectByObjectToLong<A,B> { long apply(A a, B b); } |
3502 |
|
|
/** Interface describing a function mapping two arguments to an int */ |
3503 |
|
|
public interface ObjectByObjectToInt<A,B> {int apply(A a, B b); } |
3504 |
|
|
/** Interface describing a function mapping a double to a double */ |
3505 |
|
|
public interface DoubleToDouble { double apply(double a); } |
3506 |
|
|
/** Interface describing a function mapping a long to a long */ |
3507 |
|
|
public interface LongToLong { long apply(long a); } |
3508 |
|
|
/** Interface describing a function mapping an int to an int */ |
3509 |
|
|
public interface IntToInt { int apply(int a); } |
3510 |
|
|
/** Interface describing a function mapping two doubles to a double */ |
3511 |
|
|
public interface DoubleByDoubleToDouble { double apply(double a, double b); } |
3512 |
|
|
/** Interface describing a function mapping two longs to a long */ |
3513 |
|
|
public interface LongByLongToLong { long apply(long a, long b); } |
3514 |
|
|
/** Interface describing a function mapping two ints to an int */ |
3515 |
|
|
public interface IntByIntToInt { int apply(int a, int b); } |
3516 |
|
|
|
3517 |
|
|
|
3518 |
|
|
// ------------------------------------------------------- |
3519 |
|
|
|
3520 |
|
|
/** |
3521 |
|
|
* Returns an extended {@link Parallel} view of this map using the |
3522 |
|
|
* given executor for bulk parallel operations. |
3523 |
|
|
* |
3524 |
|
|
* @param executor the executor |
3525 |
|
|
* @return a parallel view |
3526 |
|
|
*/ |
3527 |
|
|
public Parallel parallel(ForkJoinPool executor) { |
3528 |
|
|
return new Parallel(executor); |
3529 |
|
|
} |
3530 |
|
|
|
3531 |
|
|
/** |
3532 |
|
|
* An extended view of a ConcurrentHashMap supporting bulk |
3533 |
jsr166 |
1.121 |
* parallel operations. These operations are designed to be |
3534 |
dl |
1.119 |
* safely, and often sensibly, applied even with maps that are |
3535 |
|
|
* being concurrently updated by other threads; for example, when |
3536 |
|
|
* computing a snapshot summary of the values in a shared |
3537 |
|
|
* registry. There are three kinds of operation, each with four |
3538 |
|
|
* forms, accepting functions with Keys, Values, Entries, and |
3539 |
|
|
* (Key, Value) arguments and/or return values. Because the |
3540 |
|
|
* elements of a ConcurrentHashMap are not ordered in any |
3541 |
|
|
* particular way, and may be processed in different orders in |
3542 |
|
|
* different parallel executions, the correctness of supplied |
3543 |
|
|
* functions should not depend on any ordering, or on any other |
3544 |
|
|
* objects or values that may transiently change while computation |
3545 |
|
|
* is in progress; and except for forEach actions, should ideally |
3546 |
|
|
* be side-effect-free. |
3547 |
|
|
* |
3548 |
|
|
* <ul> |
3549 |
|
|
* <li> forEach: Perform a given action on each element. |
3550 |
|
|
* A variant form applies a given transformation on each element |
3551 |
|
|
* before performing the action.</li> |
3552 |
|
|
* |
3553 |
|
|
* <li> search: Return the first available non-null result of |
3554 |
|
|
* applying a given function on each element; skipping further |
3555 |
|
|
* search when a result is found.</li> |
3556 |
|
|
* |
3557 |
|
|
* <li> reduce: Accumulate each element. The supplied reduction |
3558 |
|
|
* function cannot rely on ordering (more formally, it should be |
3559 |
|
|
* both associative and commutative). There are five variants: |
3560 |
|
|
* |
3561 |
|
|
* <ul> |
3562 |
|
|
* |
3563 |
|
|
* <li> Plain reductions. (There is not a form of this method for |
3564 |
|
|
* (key, value) function arguments since there is no corresponding |
3565 |
|
|
* return type.)</li> |
3566 |
|
|
* |
3567 |
|
|
* <li> Mapped reductions that accumulate the results of a given |
3568 |
|
|
* function applied to each element.</li> |
3569 |
|
|
* |
3570 |
|
|
* <li> Reductions to scalar doubles, longs, and ints, using a |
3571 |
|
|
* given basis value.</li> |
3572 |
|
|
* |
3573 |
|
|
* </li> |
3574 |
|
|
* </ul> |
3575 |
|
|
* </ul> |
3576 |
|
|
* |
3577 |
|
|
* <p>The concurrency properties of the bulk operations follow |
3578 |
|
|
* from those of ConcurrentHashMap: Any non-null result returned |
3579 |
|
|
* from {@code get(key)} and related access methods bears a |
3580 |
|
|
* happens-before relation with the associated insertion or |
3581 |
|
|
* update. The result of any bulk operation reflects the |
3582 |
|
|
* composition of these per-element relations (but is not |
3583 |
|
|
* necessarily atomic with respect to the map as a whole unless it |
3584 |
|
|
* is somehow known to be quiescent). Conversely, because keys |
3585 |
|
|
* and values in the map are never null, null serves as a reliable |
3586 |
|
|
* atomic indicator of the current lack of any result. To |
3587 |
|
|
* maintain this property, null serves as an implicit basis for |
3588 |
|
|
* all non-scalar reduction operations. For the double, long, and |
3589 |
|
|
* int versions, the basis should be one that, when combined with |
3590 |
|
|
* any other value, returns that other value (more formally, it |
3591 |
|
|
* should be the identity element for the reduction). Most common |
3592 |
|
|
* reductions have these properties; for example, computing a sum |
3593 |
|
|
* with basis 0 or a minimum with basis MAX_VALUE. |
3594 |
|
|
* |
3595 |
|
|
* <p>Search and transformation functions provided as arguments |
3596 |
|
|
* should similarly return null to indicate the lack of any result |
3597 |
|
|
* (in which case it is not used). In the case of mapped |
3598 |
|
|
* reductions, this also enables transformations to serve as |
3599 |
|
|
* filters, returning null (or, in the case of primitive |
3600 |
|
|
* specializations, the identity basis) if the element should not |
3601 |
|
|
* be combined. You can create compound transformations and |
3602 |
|
|
* filterings by composing them yourself under this "null means |
3603 |
|
|
* there is nothing there now" rule before using them in search or |
3604 |
|
|
* reduce operations. |
3605 |
|
|
* |
3606 |
|
|
* <p>Methods accepting and/or returning Entry arguments maintain |
3607 |
|
|
* key-value associations. They may be useful for example when |
3608 |
|
|
* finding the key for the greatest value. Note that "plain" Entry |
3609 |
|
|
* arguments can be supplied using {@code new |
3610 |
|
|
* AbstractMap.SimpleEntry(k,v)}. |
3611 |
|
|
* |
3612 |
|
|
* <p> Bulk operations may complete abruptly, throwing an |
3613 |
|
|
* exception encountered in the application of a supplied |
3614 |
|
|
* function. Bear in mind when handling such exceptions that other |
3615 |
|
|
* concurrently executing functions could also have thrown |
3616 |
|
|
* exceptions, or would have done so if the first exception had |
3617 |
|
|
* not occurred. |
3618 |
|
|
* |
3619 |
|
|
* <p>Parallel speedups compared to sequential processing are |
3620 |
|
|
* common but not guaranteed. Operations involving brief |
3621 |
|
|
* functions on small maps may execute more slowly than sequential |
3622 |
|
|
* loops if the underlying work to parallelize the computation is |
3623 |
|
|
* more expensive than the computation itself. Similarly, |
3624 |
|
|
* parallelization may not lead to much actual parallelism if all |
3625 |
|
|
* processors are busy performing unrelated tasks. |
3626 |
|
|
* |
3627 |
|
|
* <p> All arguments to all task methods must be non-null. |
3628 |
|
|
* |
3629 |
|
|
* <p><em>jsr166e note: During transition, this class |
3630 |
|
|
* uses nested functional interfaces with different names but the |
3631 |
|
|
* same forms as those expected for JDK8.<em> |
3632 |
|
|
*/ |
3633 |
|
|
public class Parallel { |
3634 |
|
|
final ForkJoinPool fjp; |
3635 |
|
|
|
3636 |
|
|
/** |
3637 |
|
|
* Returns an extended view of this map using the given |
3638 |
|
|
* executor for bulk parallel operations. |
3639 |
|
|
* |
3640 |
|
|
* @param executor the executor |
3641 |
|
|
*/ |
3642 |
|
|
public Parallel(ForkJoinPool executor) { |
3643 |
|
|
this.fjp = executor; |
3644 |
|
|
} |
3645 |
|
|
|
3646 |
|
|
/** |
3647 |
|
|
* Performs the given action for each (key, value). |
3648 |
|
|
* |
3649 |
|
|
* @param action the action |
3650 |
|
|
*/ |
3651 |
jsr166 |
1.120 |
public void forEach(BiAction<K,V> action) { |
3652 |
dl |
1.119 |
fjp.invoke(ForkJoinTasks.forEach |
3653 |
|
|
(ConcurrentHashMap.this, action)); |
3654 |
|
|
} |
3655 |
|
|
|
3656 |
|
|
/** |
3657 |
|
|
* Performs the given action for each non-null transformation |
3658 |
|
|
* of each (key, value). |
3659 |
|
|
* |
3660 |
|
|
* @param transformer a function returning the transformation |
3661 |
|
|
* for an element, or null of there is no transformation (in |
3662 |
|
|
* which case the action is not applied). |
3663 |
|
|
* @param action the action |
3664 |
|
|
*/ |
3665 |
jsr166 |
1.120 |
public <U> void forEach(BiFun<? super K, ? super V, ? extends U> transformer, |
3666 |
dl |
1.119 |
Action<U> action) { |
3667 |
|
|
fjp.invoke(ForkJoinTasks.forEach |
3668 |
|
|
(ConcurrentHashMap.this, transformer, action)); |
3669 |
|
|
} |
3670 |
|
|
|
3671 |
|
|
/** |
3672 |
|
|
* Returns a non-null result from applying the given search |
3673 |
dl |
1.126 |
* function on each (key, value), or null if none. Upon |
3674 |
|
|
* success, further element processing is suppressed and the |
3675 |
|
|
* results of any other parallel invocations of the search |
3676 |
|
|
* function are ignored. |
3677 |
dl |
1.119 |
* |
3678 |
|
|
* @param searchFunction a function returning a non-null |
3679 |
|
|
* result on success, else null |
3680 |
|
|
* @return a non-null result from applying the given search |
3681 |
|
|
* function on each (key, value), or null if none |
3682 |
|
|
*/ |
3683 |
|
|
public <U> U search(BiFun<? super K, ? super V, ? extends U> searchFunction) { |
3684 |
|
|
return fjp.invoke(ForkJoinTasks.search |
3685 |
|
|
(ConcurrentHashMap.this, searchFunction)); |
3686 |
|
|
} |
3687 |
|
|
|
3688 |
|
|
/** |
3689 |
|
|
* Returns the result of accumulating the given transformation |
3690 |
|
|
* of all (key, value) pairs using the given reducer to |
3691 |
|
|
* combine values, or null if none. |
3692 |
|
|
* |
3693 |
|
|
* @param transformer a function returning the transformation |
3694 |
|
|
* for an element, or null of there is no transformation (in |
3695 |
|
|
* which case it is not combined). |
3696 |
|
|
* @param reducer a commutative associative combining function |
3697 |
|
|
* @return the result of accumulating the given transformation |
3698 |
|
|
* of all (key, value) pairs |
3699 |
|
|
*/ |
3700 |
|
|
public <U> U reduce(BiFun<? super K, ? super V, ? extends U> transformer, |
3701 |
|
|
BiFun<? super U, ? super U, ? extends U> reducer) { |
3702 |
|
|
return fjp.invoke(ForkJoinTasks.reduce |
3703 |
|
|
(ConcurrentHashMap.this, transformer, reducer)); |
3704 |
|
|
} |
3705 |
|
|
|
3706 |
|
|
/** |
3707 |
|
|
* Returns the result of accumulating the given transformation |
3708 |
|
|
* of all (key, value) pairs using the given reducer to |
3709 |
|
|
* combine values, and the given basis as an identity value. |
3710 |
|
|
* |
3711 |
|
|
* @param transformer a function returning the transformation |
3712 |
|
|
* for an element |
3713 |
|
|
* @param basis the identity (initial default value) for the reduction |
3714 |
|
|
* @param reducer a commutative associative combining function |
3715 |
|
|
* @return the result of accumulating the given transformation |
3716 |
|
|
* of all (key, value) pairs |
3717 |
|
|
*/ |
3718 |
|
|
public double reduceToDouble(ObjectByObjectToDouble<? super K, ? super V> transformer, |
3719 |
|
|
double basis, |
3720 |
|
|
DoubleByDoubleToDouble reducer) { |
3721 |
|
|
return fjp.invoke(ForkJoinTasks.reduceToDouble |
3722 |
|
|
(ConcurrentHashMap.this, transformer, basis, reducer)); |
3723 |
|
|
} |
3724 |
|
|
|
3725 |
|
|
/** |
3726 |
|
|
* Returns the result of accumulating the given transformation |
3727 |
|
|
* of all (key, value) pairs using the given reducer to |
3728 |
|
|
* combine values, and the given basis as an identity value. |
3729 |
|
|
* |
3730 |
|
|
* @param transformer a function returning the transformation |
3731 |
|
|
* for an element |
3732 |
|
|
* @param basis the identity (initial default value) for the reduction |
3733 |
|
|
* @param reducer a commutative associative combining function |
3734 |
|
|
* @return the result of accumulating the given transformation |
3735 |
dl |
1.126 |
* of all (key, value) pairs |
3736 |
dl |
1.119 |
*/ |
3737 |
|
|
public long reduceToLong(ObjectByObjectToLong<? super K, ? super V> transformer, |
3738 |
|
|
long basis, |
3739 |
|
|
LongByLongToLong reducer) { |
3740 |
|
|
return fjp.invoke(ForkJoinTasks.reduceToLong |
3741 |
|
|
(ConcurrentHashMap.this, transformer, basis, reducer)); |
3742 |
|
|
} |
3743 |
|
|
|
3744 |
|
|
/** |
3745 |
|
|
* Returns the result of accumulating the given transformation |
3746 |
|
|
* of all (key, value) pairs using the given reducer to |
3747 |
|
|
* combine values, and the given basis as an identity value. |
3748 |
|
|
* |
3749 |
|
|
* @param transformer a function returning the transformation |
3750 |
|
|
* for an element |
3751 |
|
|
* @param basis the identity (initial default value) for the reduction |
3752 |
|
|
* @param reducer a commutative associative combining function |
3753 |
|
|
* @return the result of accumulating the given transformation |
3754 |
|
|
* of all (key, value) pairs |
3755 |
|
|
*/ |
3756 |
|
|
public int reduceToInt(ObjectByObjectToInt<? super K, ? super V> transformer, |
3757 |
|
|
int basis, |
3758 |
|
|
IntByIntToInt reducer) { |
3759 |
|
|
return fjp.invoke(ForkJoinTasks.reduceToInt |
3760 |
|
|
(ConcurrentHashMap.this, transformer, basis, reducer)); |
3761 |
|
|
} |
3762 |
|
|
|
3763 |
|
|
/** |
3764 |
jsr166 |
1.123 |
* Performs the given action for each key. |
3765 |
dl |
1.119 |
* |
3766 |
|
|
* @param action the action |
3767 |
|
|
*/ |
3768 |
jsr166 |
1.120 |
public void forEachKey(Action<K> action) { |
3769 |
dl |
1.119 |
fjp.invoke(ForkJoinTasks.forEachKey |
3770 |
|
|
(ConcurrentHashMap.this, action)); |
3771 |
|
|
} |
3772 |
|
|
|
3773 |
|
|
/** |
3774 |
|
|
* Performs the given action for each non-null transformation |
3775 |
jsr166 |
1.123 |
* of each key. |
3776 |
dl |
1.119 |
* |
3777 |
|
|
* @param transformer a function returning the transformation |
3778 |
|
|
* for an element, or null of there is no transformation (in |
3779 |
|
|
* which case the action is not applied). |
3780 |
|
|
* @param action the action |
3781 |
|
|
*/ |
3782 |
jsr166 |
1.120 |
public <U> void forEachKey(Fun<? super K, ? extends U> transformer, |
3783 |
dl |
1.119 |
Action<U> action) { |
3784 |
|
|
fjp.invoke(ForkJoinTasks.forEachKey |
3785 |
|
|
(ConcurrentHashMap.this, transformer, action)); |
3786 |
|
|
} |
3787 |
|
|
|
3788 |
|
|
/** |
3789 |
|
|
* Returns a non-null result from applying the given search |
3790 |
dl |
1.126 |
* function on each key, or null if none. Upon success, |
3791 |
|
|
* further element processing is suppressed and the results of |
3792 |
|
|
* any other parallel invocations of the search function are |
3793 |
|
|
* ignored. |
3794 |
dl |
1.119 |
* |
3795 |
|
|
* @param searchFunction a function returning a non-null |
3796 |
|
|
* result on success, else null |
3797 |
|
|
* @return a non-null result from applying the given search |
3798 |
|
|
* function on each key, or null if none |
3799 |
|
|
*/ |
3800 |
|
|
public <U> U searchKeys(Fun<? super K, ? extends U> searchFunction) { |
3801 |
|
|
return fjp.invoke(ForkJoinTasks.searchKeys |
3802 |
|
|
(ConcurrentHashMap.this, searchFunction)); |
3803 |
|
|
} |
3804 |
|
|
|
3805 |
|
|
/** |
3806 |
|
|
* Returns the result of accumulating all keys using the given |
3807 |
|
|
* reducer to combine values, or null if none. |
3808 |
|
|
* |
3809 |
|
|
* @param reducer a commutative associative combining function |
3810 |
|
|
* @return the result of accumulating all keys using the given |
3811 |
|
|
* reducer to combine values, or null if none |
3812 |
|
|
*/ |
3813 |
|
|
public K reduceKeys(BiFun<? super K, ? super K, ? extends K> reducer) { |
3814 |
|
|
return fjp.invoke(ForkJoinTasks.reduceKeys |
3815 |
|
|
(ConcurrentHashMap.this, reducer)); |
3816 |
|
|
} |
3817 |
|
|
|
3818 |
|
|
/** |
3819 |
|
|
* Returns the result of accumulating the given transformation |
3820 |
|
|
* of all keys using the given reducer to combine values, or |
3821 |
|
|
* null if none. |
3822 |
|
|
* |
3823 |
|
|
* @param transformer a function returning the transformation |
3824 |
|
|
* for an element, or null of there is no transformation (in |
3825 |
|
|
* which case it is not combined). |
3826 |
|
|
* @param reducer a commutative associative combining function |
3827 |
|
|
* @return the result of accumulating the given transformation |
3828 |
|
|
* of all keys |
3829 |
|
|
*/ |
3830 |
|
|
public <U> U reduceKeys(Fun<? super K, ? extends U> transformer, |
3831 |
|
|
BiFun<? super U, ? super U, ? extends U> reducer) { |
3832 |
|
|
return fjp.invoke(ForkJoinTasks.reduceKeys |
3833 |
|
|
(ConcurrentHashMap.this, transformer, reducer)); |
3834 |
|
|
} |
3835 |
|
|
|
3836 |
|
|
/** |
3837 |
|
|
* Returns the result of accumulating the given transformation |
3838 |
|
|
* of all keys using the given reducer to combine values, and |
3839 |
|
|
* the given basis as an identity value. |
3840 |
|
|
* |
3841 |
|
|
* @param transformer a function returning the transformation |
3842 |
|
|
* for an element |
3843 |
|
|
* @param basis the identity (initial default value) for the reduction |
3844 |
|
|
* @param reducer a commutative associative combining function |
3845 |
|
|
* @return the result of accumulating the given transformation |
3846 |
|
|
* of all keys |
3847 |
|
|
*/ |
3848 |
|
|
public double reduceKeysToDouble(ObjectToDouble<? super K> transformer, |
3849 |
|
|
double basis, |
3850 |
|
|
DoubleByDoubleToDouble reducer) { |
3851 |
|
|
return fjp.invoke(ForkJoinTasks.reduceKeysToDouble |
3852 |
|
|
(ConcurrentHashMap.this, transformer, basis, reducer)); |
3853 |
|
|
} |
3854 |
|
|
|
3855 |
|
|
/** |
3856 |
|
|
* Returns the result of accumulating the given transformation |
3857 |
|
|
* of all keys using the given reducer to combine values, and |
3858 |
|
|
* the given basis as an identity value. |
3859 |
|
|
* |
3860 |
|
|
* @param transformer a function returning the transformation |
3861 |
|
|
* for an element |
3862 |
|
|
* @param basis the identity (initial default value) for the reduction |
3863 |
|
|
* @param reducer a commutative associative combining function |
3864 |
|
|
* @return the result of accumulating the given transformation |
3865 |
|
|
* of all keys |
3866 |
|
|
*/ |
3867 |
|
|
public long reduceKeysToLong(ObjectToLong<? super K> transformer, |
3868 |
|
|
long basis, |
3869 |
|
|
LongByLongToLong reducer) { |
3870 |
|
|
return fjp.invoke(ForkJoinTasks.reduceKeysToLong |
3871 |
|
|
(ConcurrentHashMap.this, transformer, basis, reducer)); |
3872 |
|
|
} |
3873 |
|
|
|
3874 |
|
|
/** |
3875 |
|
|
* Returns the result of accumulating the given transformation |
3876 |
|
|
* of all keys using the given reducer to combine values, and |
3877 |
|
|
* the given basis as an identity value. |
3878 |
|
|
* |
3879 |
|
|
* @param transformer a function returning the transformation |
3880 |
|
|
* for an element |
3881 |
|
|
* @param basis the identity (initial default value) for the reduction |
3882 |
|
|
* @param reducer a commutative associative combining function |
3883 |
|
|
* @return the result of accumulating the given transformation |
3884 |
|
|
* of all keys |
3885 |
|
|
*/ |
3886 |
|
|
public int reduceKeysToInt(ObjectToInt<? super K> transformer, |
3887 |
|
|
int basis, |
3888 |
|
|
IntByIntToInt reducer) { |
3889 |
|
|
return fjp.invoke(ForkJoinTasks.reduceKeysToInt |
3890 |
|
|
(ConcurrentHashMap.this, transformer, basis, reducer)); |
3891 |
|
|
} |
3892 |
|
|
|
3893 |
|
|
/** |
3894 |
jsr166 |
1.123 |
* Performs the given action for each value. |
3895 |
dl |
1.119 |
* |
3896 |
|
|
* @param action the action |
3897 |
|
|
*/ |
3898 |
jsr166 |
1.120 |
public void forEachValue(Action<V> action) { |
3899 |
dl |
1.119 |
fjp.invoke(ForkJoinTasks.forEachValue |
3900 |
|
|
(ConcurrentHashMap.this, action)); |
3901 |
|
|
} |
3902 |
|
|
|
3903 |
|
|
/** |
3904 |
|
|
* Performs the given action for each non-null transformation |
3905 |
jsr166 |
1.123 |
* of each value. |
3906 |
dl |
1.119 |
* |
3907 |
|
|
* @param transformer a function returning the transformation |
3908 |
|
|
* for an element, or null of there is no transformation (in |
3909 |
|
|
* which case the action is not applied). |
3910 |
|
|
*/ |
3911 |
jsr166 |
1.120 |
public <U> void forEachValue(Fun<? super V, ? extends U> transformer, |
3912 |
dl |
1.119 |
Action<U> action) { |
3913 |
|
|
fjp.invoke(ForkJoinTasks.forEachValue |
3914 |
|
|
(ConcurrentHashMap.this, transformer, action)); |
3915 |
|
|
} |
3916 |
|
|
|
3917 |
|
|
/** |
3918 |
|
|
* Returns a non-null result from applying the given search |
3919 |
dl |
1.126 |
* function on each value, or null if none. Upon success, |
3920 |
|
|
* further element processing is suppressed and the results of |
3921 |
|
|
* any other parallel invocations of the search function are |
3922 |
|
|
* ignored. |
3923 |
dl |
1.119 |
* |
3924 |
|
|
* @param searchFunction a function returning a non-null |
3925 |
|
|
* result on success, else null |
3926 |
|
|
* @return a non-null result from applying the given search |
3927 |
|
|
* function on each value, or null if none |
3928 |
|
|
* |
3929 |
|
|
*/ |
3930 |
|
|
public <U> U searchValues(Fun<? super V, ? extends U> searchFunction) { |
3931 |
|
|
return fjp.invoke(ForkJoinTasks.searchValues |
3932 |
|
|
(ConcurrentHashMap.this, searchFunction)); |
3933 |
|
|
} |
3934 |
|
|
|
3935 |
|
|
/** |
3936 |
|
|
* Returns the result of accumulating all values using the |
3937 |
|
|
* given reducer to combine values, or null if none. |
3938 |
|
|
* |
3939 |
|
|
* @param reducer a commutative associative combining function |
3940 |
|
|
* @return the result of accumulating all values |
3941 |
|
|
*/ |
3942 |
|
|
public V reduceValues(BiFun<? super V, ? super V, ? extends V> reducer) { |
3943 |
|
|
return fjp.invoke(ForkJoinTasks.reduceValues |
3944 |
|
|
(ConcurrentHashMap.this, reducer)); |
3945 |
|
|
} |
3946 |
|
|
|
3947 |
|
|
/** |
3948 |
|
|
* Returns the result of accumulating the given transformation |
3949 |
|
|
* of all values using the given reducer to combine values, or |
3950 |
|
|
* null if none. |
3951 |
|
|
* |
3952 |
|
|
* @param transformer a function returning the transformation |
3953 |
|
|
* for an element, or null of there is no transformation (in |
3954 |
|
|
* which case it is not combined). |
3955 |
|
|
* @param reducer a commutative associative combining function |
3956 |
|
|
* @return the result of accumulating the given transformation |
3957 |
|
|
* of all values |
3958 |
|
|
*/ |
3959 |
|
|
public <U> U reduceValues(Fun<? super V, ? extends U> transformer, |
3960 |
|
|
BiFun<? super U, ? super U, ? extends U> reducer) { |
3961 |
|
|
return fjp.invoke(ForkJoinTasks.reduceValues |
3962 |
|
|
(ConcurrentHashMap.this, transformer, reducer)); |
3963 |
|
|
} |
3964 |
|
|
|
3965 |
|
|
/** |
3966 |
|
|
* Returns the result of accumulating the given transformation |
3967 |
|
|
* of all values using the given reducer to combine values, |
3968 |
|
|
* and the given basis as an identity value. |
3969 |
|
|
* |
3970 |
|
|
* @param transformer a function returning the transformation |
3971 |
|
|
* for an element |
3972 |
|
|
* @param basis the identity (initial default value) for the reduction |
3973 |
|
|
* @param reducer a commutative associative combining function |
3974 |
|
|
* @return the result of accumulating the given transformation |
3975 |
|
|
* of all values |
3976 |
|
|
*/ |
3977 |
|
|
public double reduceValuesToDouble(ObjectToDouble<? super V> transformer, |
3978 |
|
|
double basis, |
3979 |
|
|
DoubleByDoubleToDouble reducer) { |
3980 |
|
|
return fjp.invoke(ForkJoinTasks.reduceValuesToDouble |
3981 |
|
|
(ConcurrentHashMap.this, transformer, basis, reducer)); |
3982 |
|
|
} |
3983 |
|
|
|
3984 |
|
|
/** |
3985 |
|
|
* Returns the result of accumulating the given transformation |
3986 |
|
|
* of all values using the given reducer to combine values, |
3987 |
|
|
* and the given basis as an identity value. |
3988 |
|
|
* |
3989 |
|
|
* @param transformer a function returning the transformation |
3990 |
|
|
* for an element |
3991 |
|
|
* @param basis the identity (initial default value) for the reduction |
3992 |
|
|
* @param reducer a commutative associative combining function |
3993 |
|
|
* @return the result of accumulating the given transformation |
3994 |
|
|
* of all values |
3995 |
|
|
*/ |
3996 |
|
|
public long reduceValuesToLong(ObjectToLong<? super V> transformer, |
3997 |
|
|
long basis, |
3998 |
|
|
LongByLongToLong reducer) { |
3999 |
|
|
return fjp.invoke(ForkJoinTasks.reduceValuesToLong |
4000 |
|
|
(ConcurrentHashMap.this, transformer, basis, reducer)); |
4001 |
|
|
} |
4002 |
|
|
|
4003 |
|
|
/** |
4004 |
|
|
* Returns the result of accumulating the given transformation |
4005 |
|
|
* of all values using the given reducer to combine values, |
4006 |
|
|
* and the given basis as an identity value. |
4007 |
|
|
* |
4008 |
|
|
* @param transformer a function returning the transformation |
4009 |
|
|
* for an element |
4010 |
|
|
* @param basis the identity (initial default value) for the reduction |
4011 |
|
|
* @param reducer a commutative associative combining function |
4012 |
|
|
* @return the result of accumulating the given transformation |
4013 |
|
|
* of all values |
4014 |
|
|
*/ |
4015 |
|
|
public int reduceValuesToInt(ObjectToInt<? super V> transformer, |
4016 |
|
|
int basis, |
4017 |
|
|
IntByIntToInt reducer) { |
4018 |
|
|
return fjp.invoke(ForkJoinTasks.reduceValuesToInt |
4019 |
|
|
(ConcurrentHashMap.this, transformer, basis, reducer)); |
4020 |
|
|
} |
4021 |
|
|
|
4022 |
|
|
/** |
4023 |
jsr166 |
1.123 |
* Performs the given action for each entry. |
4024 |
dl |
1.119 |
* |
4025 |
|
|
* @param action the action |
4026 |
|
|
*/ |
4027 |
jsr166 |
1.120 |
public void forEachEntry(Action<Map.Entry<K,V>> action) { |
4028 |
dl |
1.119 |
fjp.invoke(ForkJoinTasks.forEachEntry |
4029 |
|
|
(ConcurrentHashMap.this, action)); |
4030 |
|
|
} |
4031 |
|
|
|
4032 |
|
|
/** |
4033 |
jsr166 |
1.123 |
* Performs the given action for each non-null transformation |
4034 |
|
|
* of each entry. |
4035 |
dl |
1.119 |
* |
4036 |
|
|
* @param transformer a function returning the transformation |
4037 |
|
|
* for an element, or null of there is no transformation (in |
4038 |
|
|
* which case the action is not applied). |
4039 |
|
|
* @param action the action |
4040 |
|
|
*/ |
4041 |
jsr166 |
1.120 |
public <U> void forEachEntry(Fun<Map.Entry<K,V>, ? extends U> transformer, |
4042 |
dl |
1.119 |
Action<U> action) { |
4043 |
|
|
fjp.invoke(ForkJoinTasks.forEachEntry |
4044 |
|
|
(ConcurrentHashMap.this, transformer, action)); |
4045 |
|
|
} |
4046 |
|
|
|
4047 |
|
|
/** |
4048 |
|
|
* Returns a non-null result from applying the given search |
4049 |
dl |
1.126 |
* function on each entry, or null if none. Upon success, |
4050 |
|
|
* further element processing is suppressed and the results of |
4051 |
|
|
* any other parallel invocations of the search function are |
4052 |
|
|
* ignored. |
4053 |
dl |
1.119 |
* |
4054 |
|
|
* @param searchFunction a function returning a non-null |
4055 |
|
|
* result on success, else null |
4056 |
|
|
* @return a non-null result from applying the given search |
4057 |
|
|
* function on each entry, or null if none |
4058 |
|
|
*/ |
4059 |
|
|
public <U> U searchEntries(Fun<Map.Entry<K,V>, ? extends U> searchFunction) { |
4060 |
|
|
return fjp.invoke(ForkJoinTasks.searchEntries |
4061 |
|
|
(ConcurrentHashMap.this, searchFunction)); |
4062 |
|
|
} |
4063 |
|
|
|
4064 |
|
|
/** |
4065 |
|
|
* Returns the result of accumulating all entries using the |
4066 |
|
|
* given reducer to combine values, or null if none. |
4067 |
|
|
* |
4068 |
|
|
* @param reducer a commutative associative combining function |
4069 |
|
|
* @return the result of accumulating all entries |
4070 |
|
|
*/ |
4071 |
|
|
public Map.Entry<K,V> reduceEntries(BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) { |
4072 |
|
|
return fjp.invoke(ForkJoinTasks.reduceEntries |
4073 |
|
|
(ConcurrentHashMap.this, reducer)); |
4074 |
|
|
} |
4075 |
|
|
|
4076 |
|
|
/** |
4077 |
|
|
* Returns the result of accumulating the given transformation |
4078 |
|
|
* of all entries using the given reducer to combine values, |
4079 |
|
|
* or null if none. |
4080 |
|
|
* |
4081 |
|
|
* @param transformer a function returning the transformation |
4082 |
|
|
* for an element, or null of there is no transformation (in |
4083 |
|
|
* which case it is not combined). |
4084 |
|
|
* @param reducer a commutative associative combining function |
4085 |
|
|
* @return the result of accumulating the given transformation |
4086 |
|
|
* of all entries |
4087 |
|
|
*/ |
4088 |
|
|
public <U> U reduceEntries(Fun<Map.Entry<K,V>, ? extends U> transformer, |
4089 |
|
|
BiFun<? super U, ? super U, ? extends U> reducer) { |
4090 |
|
|
return fjp.invoke(ForkJoinTasks.reduceEntries |
4091 |
|
|
(ConcurrentHashMap.this, transformer, reducer)); |
4092 |
|
|
} |
4093 |
|
|
|
4094 |
|
|
/** |
4095 |
|
|
* Returns the result of accumulating the given transformation |
4096 |
|
|
* of all entries using the given reducer to combine values, |
4097 |
|
|
* and the given basis as an identity value. |
4098 |
|
|
* |
4099 |
|
|
* @param transformer a function returning the transformation |
4100 |
|
|
* for an element |
4101 |
|
|
* @param basis the identity (initial default value) for the reduction |
4102 |
|
|
* @param reducer a commutative associative combining function |
4103 |
|
|
* @return the result of accumulating the given transformation |
4104 |
|
|
* of all entries |
4105 |
|
|
*/ |
4106 |
|
|
public double reduceEntriesToDouble(ObjectToDouble<Map.Entry<K,V>> transformer, |
4107 |
|
|
double basis, |
4108 |
|
|
DoubleByDoubleToDouble reducer) { |
4109 |
|
|
return fjp.invoke(ForkJoinTasks.reduceEntriesToDouble |
4110 |
|
|
(ConcurrentHashMap.this, transformer, basis, reducer)); |
4111 |
|
|
} |
4112 |
|
|
|
4113 |
|
|
/** |
4114 |
|
|
* Returns the result of accumulating the given transformation |
4115 |
|
|
* of all entries using the given reducer to combine values, |
4116 |
|
|
* and the given basis as an identity value. |
4117 |
|
|
* |
4118 |
|
|
* @param transformer a function returning the transformation |
4119 |
|
|
* for an element |
4120 |
|
|
* @param basis the identity (initial default value) for the reduction |
4121 |
|
|
* @param reducer a commutative associative combining function |
4122 |
|
|
* @return the result of accumulating the given transformation |
4123 |
|
|
* of all entries |
4124 |
|
|
*/ |
4125 |
|
|
public long reduceEntriesToLong(ObjectToLong<Map.Entry<K,V>> transformer, |
4126 |
|
|
long basis, |
4127 |
|
|
LongByLongToLong reducer) { |
4128 |
|
|
return fjp.invoke(ForkJoinTasks.reduceEntriesToLong |
4129 |
|
|
(ConcurrentHashMap.this, transformer, basis, reducer)); |
4130 |
|
|
} |
4131 |
|
|
|
4132 |
|
|
/** |
4133 |
|
|
* Returns the result of accumulating the given transformation |
4134 |
|
|
* of all entries using the given reducer to combine values, |
4135 |
|
|
* and the given basis as an identity value. |
4136 |
|
|
* |
4137 |
|
|
* @param transformer a function returning the transformation |
4138 |
|
|
* for an element |
4139 |
|
|
* @param basis the identity (initial default value) for the reduction |
4140 |
|
|
* @param reducer a commutative associative combining function |
4141 |
|
|
* @return the result of accumulating the given transformation |
4142 |
|
|
* of all entries |
4143 |
|
|
*/ |
4144 |
|
|
public int reduceEntriesToInt(ObjectToInt<Map.Entry<K,V>> transformer, |
4145 |
|
|
int basis, |
4146 |
|
|
IntByIntToInt reducer) { |
4147 |
|
|
return fjp.invoke(ForkJoinTasks.reduceEntriesToInt |
4148 |
|
|
(ConcurrentHashMap.this, transformer, basis, reducer)); |
4149 |
|
|
} |
4150 |
|
|
} |
4151 |
|
|
|
4152 |
|
|
// --------------------------------------------------------------------- |
4153 |
|
|
|
4154 |
|
|
/** |
4155 |
|
|
* Predefined tasks for performing bulk parallel operations on |
4156 |
|
|
* ConcurrentHashMaps. These tasks follow the forms and rules used |
4157 |
|
|
* in class {@link Parallel}. Each method has the same name, but |
4158 |
|
|
* returns a task rather than invoking it. These methods may be |
4159 |
|
|
* useful in custom applications such as submitting a task without |
4160 |
|
|
* waiting for completion, or combining with other tasks. |
4161 |
|
|
*/ |
4162 |
|
|
public static class ForkJoinTasks { |
4163 |
|
|
private ForkJoinTasks() {} |
4164 |
|
|
|
4165 |
|
|
/** |
4166 |
|
|
* Returns a task that when invoked, performs the given |
4167 |
|
|
* action for each (key, value) |
4168 |
|
|
* |
4169 |
|
|
* @param map the map |
4170 |
|
|
* @param action the action |
4171 |
|
|
* @return the task |
4172 |
|
|
*/ |
4173 |
jsr166 |
1.120 |
public static <K,V> ForkJoinTask<Void> forEach |
4174 |
dl |
1.119 |
(ConcurrentHashMap<K,V> map, |
4175 |
|
|
BiAction<K,V> action) { |
4176 |
|
|
if (action == null) throw new NullPointerException(); |
4177 |
|
|
return new ForEachMappingTask<K,V>(map, action); |
4178 |
|
|
} |
4179 |
|
|
|
4180 |
|
|
/** |
4181 |
|
|
* Returns a task that when invoked, performs the given |
4182 |
|
|
* action for each non-null transformation of each (key, value) |
4183 |
|
|
* |
4184 |
|
|
* @param map the map |
4185 |
|
|
* @param transformer a function returning the transformation |
4186 |
|
|
* for an element, or null of there is no transformation (in |
4187 |
|
|
* which case the action is not applied). |
4188 |
|
|
* @param action the action |
4189 |
|
|
* @return the task |
4190 |
|
|
*/ |
4191 |
jsr166 |
1.120 |
public static <K,V,U> ForkJoinTask<Void> forEach |
4192 |
dl |
1.119 |
(ConcurrentHashMap<K,V> map, |
4193 |
|
|
BiFun<? super K, ? super V, ? extends U> transformer, |
4194 |
|
|
Action<U> action) { |
4195 |
|
|
if (transformer == null || action == null) |
4196 |
|
|
throw new NullPointerException(); |
4197 |
|
|
return new ForEachTransformedMappingTask<K,V,U> |
4198 |
|
|
(map, transformer, action); |
4199 |
|
|
} |
4200 |
|
|
|
4201 |
|
|
/** |
4202 |
dl |
1.126 |
* Returns a task that when invoked, returns a non-null result |
4203 |
|
|
* from applying the given search function on each (key, |
4204 |
|
|
* value), or null if none. Upon success, further element |
4205 |
|
|
* processing is suppressed and the results of any other |
4206 |
|
|
* parallel invocations of the search function are ignored. |
4207 |
dl |
1.119 |
* |
4208 |
|
|
* @param map the map |
4209 |
|
|
* @param searchFunction a function returning a non-null |
4210 |
|
|
* result on success, else null |
4211 |
|
|
* @return the task |
4212 |
|
|
*/ |
4213 |
|
|
public static <K,V,U> ForkJoinTask<U> search |
4214 |
|
|
(ConcurrentHashMap<K,V> map, |
4215 |
|
|
BiFun<? super K, ? super V, ? extends U> searchFunction) { |
4216 |
|
|
if (searchFunction == null) throw new NullPointerException(); |
4217 |
|
|
return new SearchMappingsTask<K,V,U> |
4218 |
|
|
(map, searchFunction, |
4219 |
|
|
new AtomicReference<U>()); |
4220 |
|
|
} |
4221 |
|
|
|
4222 |
|
|
/** |
4223 |
|
|
* Returns a task that when invoked, returns the result of |
4224 |
|
|
* accumulating the given transformation of all (key, value) pairs |
4225 |
|
|
* using the given reducer to combine values, or null if none. |
4226 |
|
|
* |
4227 |
|
|
* @param map the map |
4228 |
|
|
* @param transformer a function returning the transformation |
4229 |
|
|
* for an element, or null of there is no transformation (in |
4230 |
|
|
* which case it is not combined). |
4231 |
|
|
* @param reducer a commutative associative combining function |
4232 |
|
|
* @return the task |
4233 |
|
|
*/ |
4234 |
|
|
public static <K,V,U> ForkJoinTask<U> reduce |
4235 |
|
|
(ConcurrentHashMap<K,V> map, |
4236 |
|
|
BiFun<? super K, ? super V, ? extends U> transformer, |
4237 |
|
|
BiFun<? super U, ? super U, ? extends U> reducer) { |
4238 |
|
|
if (transformer == null || reducer == null) |
4239 |
|
|
throw new NullPointerException(); |
4240 |
|
|
return new MapReduceMappingsTask<K,V,U> |
4241 |
|
|
(map, transformer, reducer); |
4242 |
|
|
} |
4243 |
|
|
|
4244 |
|
|
/** |
4245 |
|
|
* Returns a task that when invoked, returns the result of |
4246 |
|
|
* accumulating the given transformation of all (key, value) pairs |
4247 |
|
|
* using the given reducer to combine values, and the given |
4248 |
|
|
* basis as an identity value. |
4249 |
|
|
* |
4250 |
|
|
* @param map the map |
4251 |
|
|
* @param transformer a function returning the transformation |
4252 |
|
|
* for an element |
4253 |
|
|
* @param basis the identity (initial default value) for the reduction |
4254 |
|
|
* @param reducer a commutative associative combining function |
4255 |
|
|
* @return the task |
4256 |
|
|
*/ |
4257 |
|
|
public static <K,V> ForkJoinTask<Double> reduceToDouble |
4258 |
|
|
(ConcurrentHashMap<K,V> map, |
4259 |
|
|
ObjectByObjectToDouble<? super K, ? super V> transformer, |
4260 |
|
|
double basis, |
4261 |
|
|
DoubleByDoubleToDouble reducer) { |
4262 |
|
|
if (transformer == null || reducer == null) |
4263 |
|
|
throw new NullPointerException(); |
4264 |
|
|
return new MapReduceMappingsToDoubleTask<K,V> |
4265 |
|
|
(map, transformer, basis, reducer); |
4266 |
|
|
} |
4267 |
|
|
|
4268 |
|
|
/** |
4269 |
|
|
* Returns a task that when invoked, returns the result of |
4270 |
|
|
* accumulating the given transformation of all (key, value) pairs |
4271 |
|
|
* using the given reducer to combine values, and the given |
4272 |
|
|
* basis as an identity value. |
4273 |
|
|
* |
4274 |
|
|
* @param map the map |
4275 |
|
|
* @param transformer a function returning the transformation |
4276 |
|
|
* for an element |
4277 |
|
|
* @param basis the identity (initial default value) for the reduction |
4278 |
|
|
* @param reducer a commutative associative combining function |
4279 |
|
|
* @return the task |
4280 |
|
|
*/ |
4281 |
|
|
public static <K,V> ForkJoinTask<Long> reduceToLong |
4282 |
|
|
(ConcurrentHashMap<K,V> map, |
4283 |
|
|
ObjectByObjectToLong<? super K, ? super V> transformer, |
4284 |
|
|
long basis, |
4285 |
|
|
LongByLongToLong reducer) { |
4286 |
|
|
if (transformer == null || reducer == null) |
4287 |
|
|
throw new NullPointerException(); |
4288 |
|
|
return new MapReduceMappingsToLongTask<K,V> |
4289 |
|
|
(map, transformer, basis, reducer); |
4290 |
|
|
} |
4291 |
|
|
|
4292 |
|
|
/** |
4293 |
|
|
* Returns a task that when invoked, returns the result of |
4294 |
|
|
* accumulating the given transformation of all (key, value) pairs |
4295 |
|
|
* using the given reducer to combine values, and the given |
4296 |
|
|
* basis as an identity value. |
4297 |
|
|
* |
4298 |
|
|
* @param transformer a function returning the transformation |
4299 |
|
|
* for an element |
4300 |
|
|
* @param basis the identity (initial default value) for the reduction |
4301 |
|
|
* @param reducer a commutative associative combining function |
4302 |
|
|
* @return the task |
4303 |
|
|
*/ |
4304 |
|
|
public static <K,V> ForkJoinTask<Integer> reduceToInt |
4305 |
|
|
(ConcurrentHashMap<K,V> map, |
4306 |
|
|
ObjectByObjectToInt<? super K, ? super V> transformer, |
4307 |
|
|
int basis, |
4308 |
|
|
IntByIntToInt reducer) { |
4309 |
|
|
if (transformer == null || reducer == null) |
4310 |
|
|
throw new NullPointerException(); |
4311 |
|
|
return new MapReduceMappingsToIntTask<K,V> |
4312 |
|
|
(map, transformer, basis, reducer); |
4313 |
|
|
} |
4314 |
|
|
|
4315 |
|
|
/** |
4316 |
|
|
* Returns a task that when invoked, performs the given action |
4317 |
jsr166 |
1.123 |
* for each key. |
4318 |
dl |
1.119 |
* |
4319 |
|
|
* @param map the map |
4320 |
|
|
* @param action the action |
4321 |
|
|
* @return the task |
4322 |
|
|
*/ |
4323 |
jsr166 |
1.120 |
public static <K,V> ForkJoinTask<Void> forEachKey |
4324 |
dl |
1.119 |
(ConcurrentHashMap<K,V> map, |
4325 |
|
|
Action<K> action) { |
4326 |
|
|
if (action == null) throw new NullPointerException(); |
4327 |
|
|
return new ForEachKeyTask<K,V>(map, action); |
4328 |
|
|
} |
4329 |
|
|
|
4330 |
|
|
/** |
4331 |
|
|
* Returns a task that when invoked, performs the given action |
4332 |
jsr166 |
1.123 |
* for each non-null transformation of each key. |
4333 |
dl |
1.119 |
* |
4334 |
|
|
* @param map the map |
4335 |
|
|
* @param transformer a function returning the transformation |
4336 |
|
|
* for an element, or null of there is no transformation (in |
4337 |
|
|
* which case the action is not applied). |
4338 |
|
|
* @param action the action |
4339 |
|
|
* @return the task |
4340 |
|
|
*/ |
4341 |
jsr166 |
1.120 |
public static <K,V,U> ForkJoinTask<Void> forEachKey |
4342 |
dl |
1.119 |
(ConcurrentHashMap<K,V> map, |
4343 |
|
|
Fun<? super K, ? extends U> transformer, |
4344 |
|
|
Action<U> action) { |
4345 |
|
|
if (transformer == null || action == null) |
4346 |
|
|
throw new NullPointerException(); |
4347 |
|
|
return new ForEachTransformedKeyTask<K,V,U> |
4348 |
|
|
(map, transformer, action); |
4349 |
|
|
} |
4350 |
|
|
|
4351 |
|
|
/** |
4352 |
|
|
* Returns a task that when invoked, returns a non-null result |
4353 |
|
|
* from applying the given search function on each key, or |
4354 |
dl |
1.126 |
* null if none. Upon success, further element processing is |
4355 |
|
|
* suppressed and the results of any other parallel |
4356 |
|
|
* invocations of the search function are ignored. |
4357 |
dl |
1.119 |
* |
4358 |
|
|
* @param map the map |
4359 |
|
|
* @param searchFunction a function returning a non-null |
4360 |
|
|
* result on success, else null |
4361 |
|
|
* @return the task |
4362 |
|
|
*/ |
4363 |
|
|
public static <K,V,U> ForkJoinTask<U> searchKeys |
4364 |
|
|
(ConcurrentHashMap<K,V> map, |
4365 |
|
|
Fun<? super K, ? extends U> searchFunction) { |
4366 |
|
|
if (searchFunction == null) throw new NullPointerException(); |
4367 |
|
|
return new SearchKeysTask<K,V,U> |
4368 |
|
|
(map, searchFunction, |
4369 |
|
|
new AtomicReference<U>()); |
4370 |
|
|
} |
4371 |
|
|
|
4372 |
|
|
/** |
4373 |
|
|
* Returns a task that when invoked, returns the result of |
4374 |
|
|
* accumulating all keys using the given reducer to combine |
4375 |
|
|
* values, or null if none. |
4376 |
|
|
* |
4377 |
|
|
* @param map the map |
4378 |
|
|
* @param reducer a commutative associative combining function |
4379 |
|
|
* @return the task |
4380 |
|
|
*/ |
4381 |
|
|
public static <K,V> ForkJoinTask<K> reduceKeys |
4382 |
|
|
(ConcurrentHashMap<K,V> map, |
4383 |
|
|
BiFun<? super K, ? super K, ? extends K> reducer) { |
4384 |
|
|
if (reducer == null) throw new NullPointerException(); |
4385 |
|
|
return new ReduceKeysTask<K,V> |
4386 |
|
|
(map, reducer); |
4387 |
|
|
} |
4388 |
jsr166 |
1.125 |
|
4389 |
dl |
1.119 |
/** |
4390 |
|
|
* Returns a task that when invoked, returns the result of |
4391 |
|
|
* accumulating the given transformation of all keys using the given |
4392 |
|
|
* reducer to combine values, or null if none. |
4393 |
|
|
* |
4394 |
|
|
* @param map the map |
4395 |
|
|
* @param transformer a function returning the transformation |
4396 |
|
|
* for an element, or null of there is no transformation (in |
4397 |
|
|
* which case it is not combined). |
4398 |
|
|
* @param reducer a commutative associative combining function |
4399 |
|
|
* @return the task |
4400 |
|
|
*/ |
4401 |
|
|
public static <K,V,U> ForkJoinTask<U> reduceKeys |
4402 |
|
|
(ConcurrentHashMap<K,V> map, |
4403 |
|
|
Fun<? super K, ? extends U> transformer, |
4404 |
|
|
BiFun<? super U, ? super U, ? extends U> reducer) { |
4405 |
|
|
if (transformer == null || reducer == null) |
4406 |
|
|
throw new NullPointerException(); |
4407 |
|
|
return new MapReduceKeysTask<K,V,U> |
4408 |
|
|
(map, transformer, reducer); |
4409 |
|
|
} |
4410 |
|
|
|
4411 |
|
|
/** |
4412 |
|
|
* Returns a task that when invoked, returns the result of |
4413 |
|
|
* accumulating the given transformation of all keys using the given |
4414 |
|
|
* reducer to combine values, and the given basis as an |
4415 |
|
|
* identity value. |
4416 |
|
|
* |
4417 |
|
|
* @param map the map |
4418 |
|
|
* @param transformer a function returning the transformation |
4419 |
|
|
* for an element |
4420 |
|
|
* @param basis the identity (initial default value) for the reduction |
4421 |
|
|
* @param reducer a commutative associative combining function |
4422 |
|
|
* @return the task |
4423 |
|
|
*/ |
4424 |
|
|
public static <K,V> ForkJoinTask<Double> reduceKeysToDouble |
4425 |
|
|
(ConcurrentHashMap<K,V> map, |
4426 |
|
|
ObjectToDouble<? super K> transformer, |
4427 |
|
|
double basis, |
4428 |
|
|
DoubleByDoubleToDouble reducer) { |
4429 |
|
|
if (transformer == null || reducer == null) |
4430 |
|
|
throw new NullPointerException(); |
4431 |
|
|
return new MapReduceKeysToDoubleTask<K,V> |
4432 |
|
|
(map, transformer, basis, reducer); |
4433 |
|
|
} |
4434 |
|
|
|
4435 |
|
|
/** |
4436 |
|
|
* Returns a task that when invoked, returns the result of |
4437 |
|
|
* accumulating the given transformation of all keys using the given |
4438 |
|
|
* reducer to combine values, and the given basis as an |
4439 |
|
|
* identity value. |
4440 |
|
|
* |
4441 |
|
|
* @param map the map |
4442 |
|
|
* @param transformer a function returning the transformation |
4443 |
|
|
* for an element |
4444 |
|
|
* @param basis the identity (initial default value) for the reduction |
4445 |
|
|
* @param reducer a commutative associative combining function |
4446 |
|
|
* @return the task |
4447 |
|
|
*/ |
4448 |
|
|
public static <K,V> ForkJoinTask<Long> reduceKeysToLong |
4449 |
|
|
(ConcurrentHashMap<K,V> map, |
4450 |
|
|
ObjectToLong<? super K> transformer, |
4451 |
|
|
long basis, |
4452 |
|
|
LongByLongToLong reducer) { |
4453 |
|
|
if (transformer == null || reducer == null) |
4454 |
|
|
throw new NullPointerException(); |
4455 |
|
|
return new MapReduceKeysToLongTask<K,V> |
4456 |
|
|
(map, transformer, basis, reducer); |
4457 |
|
|
} |
4458 |
|
|
|
4459 |
|
|
/** |
4460 |
|
|
* Returns a task that when invoked, returns the result of |
4461 |
|
|
* accumulating the given transformation of all keys using the given |
4462 |
|
|
* reducer to combine values, and the given basis as an |
4463 |
|
|
* identity value. |
4464 |
|
|
* |
4465 |
|
|
* @param map the map |
4466 |
|
|
* @param transformer a function returning the transformation |
4467 |
|
|
* for an element |
4468 |
|
|
* @param basis the identity (initial default value) for the reduction |
4469 |
|
|
* @param reducer a commutative associative combining function |
4470 |
|
|
* @return the task |
4471 |
|
|
*/ |
4472 |
|
|
public static <K,V> ForkJoinTask<Integer> reduceKeysToInt |
4473 |
|
|
(ConcurrentHashMap<K,V> map, |
4474 |
|
|
ObjectToInt<? super K> transformer, |
4475 |
|
|
int basis, |
4476 |
|
|
IntByIntToInt reducer) { |
4477 |
|
|
if (transformer == null || reducer == null) |
4478 |
|
|
throw new NullPointerException(); |
4479 |
|
|
return new MapReduceKeysToIntTask<K,V> |
4480 |
|
|
(map, transformer, basis, reducer); |
4481 |
|
|
} |
4482 |
|
|
|
4483 |
|
|
/** |
4484 |
|
|
* Returns a task that when invoked, performs the given action |
4485 |
jsr166 |
1.123 |
* for each value. |
4486 |
dl |
1.119 |
* |
4487 |
|
|
* @param map the map |
4488 |
|
|
* @param action the action |
4489 |
|
|
*/ |
4490 |
jsr166 |
1.120 |
public static <K,V> ForkJoinTask<Void> forEachValue |
4491 |
dl |
1.119 |
(ConcurrentHashMap<K,V> map, |
4492 |
|
|
Action<V> action) { |
4493 |
|
|
if (action == null) throw new NullPointerException(); |
4494 |
|
|
return new ForEachValueTask<K,V>(map, action); |
4495 |
|
|
} |
4496 |
|
|
|
4497 |
|
|
/** |
4498 |
|
|
* Returns a task that when invoked, performs the given action |
4499 |
jsr166 |
1.123 |
* for each non-null transformation of each value. |
4500 |
dl |
1.119 |
* |
4501 |
|
|
* @param map the map |
4502 |
|
|
* @param transformer a function returning the transformation |
4503 |
|
|
* for an element, or null of there is no transformation (in |
4504 |
|
|
* which case the action is not applied). |
4505 |
|
|
* @param action the action |
4506 |
|
|
*/ |
4507 |
jsr166 |
1.120 |
public static <K,V,U> ForkJoinTask<Void> forEachValue |
4508 |
dl |
1.119 |
(ConcurrentHashMap<K,V> map, |
4509 |
|
|
Fun<? super V, ? extends U> transformer, |
4510 |
|
|
Action<U> action) { |
4511 |
|
|
if (transformer == null || action == null) |
4512 |
|
|
throw new NullPointerException(); |
4513 |
|
|
return new ForEachTransformedValueTask<K,V,U> |
4514 |
|
|
(map, transformer, action); |
4515 |
|
|
} |
4516 |
|
|
|
4517 |
|
|
/** |
4518 |
|
|
* Returns a task that when invoked, returns a non-null result |
4519 |
|
|
* from applying the given search function on each value, or |
4520 |
dl |
1.126 |
* null if none. Upon success, further element processing is |
4521 |
|
|
* suppressed and the results of any other parallel |
4522 |
|
|
* invocations of the search function are ignored. |
4523 |
dl |
1.119 |
* |
4524 |
|
|
* @param map the map |
4525 |
|
|
* @param searchFunction a function returning a non-null |
4526 |
|
|
* result on success, else null |
4527 |
|
|
* @return the task |
4528 |
|
|
* |
4529 |
|
|
*/ |
4530 |
|
|
public static <K,V,U> ForkJoinTask<U> searchValues |
4531 |
|
|
(ConcurrentHashMap<K,V> map, |
4532 |
|
|
Fun<? super V, ? extends U> searchFunction) { |
4533 |
|
|
if (searchFunction == null) throw new NullPointerException(); |
4534 |
|
|
return new SearchValuesTask<K,V,U> |
4535 |
|
|
(map, searchFunction, |
4536 |
|
|
new AtomicReference<U>()); |
4537 |
|
|
} |
4538 |
|
|
|
4539 |
|
|
/** |
4540 |
|
|
* Returns a task that when invoked, returns the result of |
4541 |
|
|
* accumulating all values using the given reducer to combine |
4542 |
|
|
* values, or null if none. |
4543 |
|
|
* |
4544 |
|
|
* @param map the map |
4545 |
|
|
* @param reducer a commutative associative combining function |
4546 |
|
|
* @return the task |
4547 |
|
|
*/ |
4548 |
|
|
public static <K,V> ForkJoinTask<V> reduceValues |
4549 |
|
|
(ConcurrentHashMap<K,V> map, |
4550 |
|
|
BiFun<? super V, ? super V, ? extends V> reducer) { |
4551 |
|
|
if (reducer == null) throw new NullPointerException(); |
4552 |
|
|
return new ReduceValuesTask<K,V> |
4553 |
|
|
(map, reducer); |
4554 |
|
|
} |
4555 |
|
|
|
4556 |
|
|
/** |
4557 |
|
|
* Returns a task that when invoked, returns the result of |
4558 |
|
|
* accumulating the given transformation of all values using the |
4559 |
|
|
* given reducer to combine values, or null if none. |
4560 |
|
|
* |
4561 |
|
|
* @param map the map |
4562 |
|
|
* @param transformer a function returning the transformation |
4563 |
|
|
* for an element, or null of there is no transformation (in |
4564 |
|
|
* which case it is not combined). |
4565 |
|
|
* @param reducer a commutative associative combining function |
4566 |
|
|
* @return the task |
4567 |
|
|
*/ |
4568 |
|
|
public static <K,V,U> ForkJoinTask<U> reduceValues |
4569 |
|
|
(ConcurrentHashMap<K,V> map, |
4570 |
|
|
Fun<? super V, ? extends U> transformer, |
4571 |
|
|
BiFun<? super U, ? super U, ? extends U> reducer) { |
4572 |
|
|
if (transformer == null || reducer == null) |
4573 |
|
|
throw new NullPointerException(); |
4574 |
|
|
return new MapReduceValuesTask<K,V,U> |
4575 |
|
|
(map, transformer, reducer); |
4576 |
|
|
} |
4577 |
|
|
|
4578 |
|
|
/** |
4579 |
|
|
* Returns a task that when invoked, returns the result of |
4580 |
|
|
* accumulating the given transformation of all values using the |
4581 |
|
|
* given reducer to combine values, and the given basis as an |
4582 |
|
|
* identity value. |
4583 |
|
|
* |
4584 |
|
|
* @param map the map |
4585 |
|
|
* @param transformer a function returning the transformation |
4586 |
|
|
* for an element |
4587 |
|
|
* @param basis the identity (initial default value) for the reduction |
4588 |
|
|
* @param reducer a commutative associative combining function |
4589 |
|
|
* @return the task |
4590 |
|
|
*/ |
4591 |
|
|
public static <K,V> ForkJoinTask<Double> reduceValuesToDouble |
4592 |
|
|
(ConcurrentHashMap<K,V> map, |
4593 |
|
|
ObjectToDouble<? super V> transformer, |
4594 |
|
|
double basis, |
4595 |
|
|
DoubleByDoubleToDouble reducer) { |
4596 |
|
|
if (transformer == null || reducer == null) |
4597 |
|
|
throw new NullPointerException(); |
4598 |
|
|
return new MapReduceValuesToDoubleTask<K,V> |
4599 |
|
|
(map, transformer, basis, reducer); |
4600 |
|
|
} |
4601 |
|
|
|
4602 |
|
|
/** |
4603 |
|
|
* Returns a task that when invoked, returns the result of |
4604 |
|
|
* accumulating the given transformation of all values using the |
4605 |
|
|
* given reducer to combine values, and the given basis as an |
4606 |
|
|
* identity value. |
4607 |
|
|
* |
4608 |
|
|
* @param map the map |
4609 |
|
|
* @param transformer a function returning the transformation |
4610 |
|
|
* for an element |
4611 |
|
|
* @param basis the identity (initial default value) for the reduction |
4612 |
|
|
* @param reducer a commutative associative combining function |
4613 |
|
|
* @return the task |
4614 |
|
|
*/ |
4615 |
|
|
public static <K,V> ForkJoinTask<Long> reduceValuesToLong |
4616 |
|
|
(ConcurrentHashMap<K,V> map, |
4617 |
|
|
ObjectToLong<? super V> transformer, |
4618 |
|
|
long basis, |
4619 |
|
|
LongByLongToLong reducer) { |
4620 |
|
|
if (transformer == null || reducer == null) |
4621 |
|
|
throw new NullPointerException(); |
4622 |
|
|
return new MapReduceValuesToLongTask<K,V> |
4623 |
|
|
(map, transformer, basis, reducer); |
4624 |
|
|
} |
4625 |
|
|
|
4626 |
|
|
/** |
4627 |
|
|
* Returns a task that when invoked, returns the result of |
4628 |
|
|
* accumulating the given transformation of all values using the |
4629 |
|
|
* given reducer to combine values, and the given basis as an |
4630 |
|
|
* identity value. |
4631 |
|
|
* |
4632 |
|
|
* @param map the map |
4633 |
|
|
* @param transformer a function returning the transformation |
4634 |
|
|
* for an element |
4635 |
|
|
* @param basis the identity (initial default value) for the reduction |
4636 |
|
|
* @param reducer a commutative associative combining function |
4637 |
|
|
* @return the task |
4638 |
|
|
*/ |
4639 |
|
|
public static <K,V> ForkJoinTask<Integer> reduceValuesToInt |
4640 |
|
|
(ConcurrentHashMap<K,V> map, |
4641 |
|
|
ObjectToInt<? super V> transformer, |
4642 |
|
|
int basis, |
4643 |
|
|
IntByIntToInt reducer) { |
4644 |
|
|
if (transformer == null || reducer == null) |
4645 |
|
|
throw new NullPointerException(); |
4646 |
|
|
return new MapReduceValuesToIntTask<K,V> |
4647 |
|
|
(map, transformer, basis, reducer); |
4648 |
|
|
} |
4649 |
|
|
|
4650 |
|
|
/** |
4651 |
|
|
* Returns a task that when invoked, perform the given action |
4652 |
jsr166 |
1.123 |
* for each entry. |
4653 |
dl |
1.119 |
* |
4654 |
|
|
* @param map the map |
4655 |
|
|
* @param action the action |
4656 |
|
|
*/ |
4657 |
jsr166 |
1.120 |
public static <K,V> ForkJoinTask<Void> forEachEntry |
4658 |
dl |
1.119 |
(ConcurrentHashMap<K,V> map, |
4659 |
|
|
Action<Map.Entry<K,V>> action) { |
4660 |
|
|
if (action == null) throw new NullPointerException(); |
4661 |
|
|
return new ForEachEntryTask<K,V>(map, action); |
4662 |
|
|
} |
4663 |
|
|
|
4664 |
|
|
/** |
4665 |
|
|
* Returns a task that when invoked, perform the given action |
4666 |
jsr166 |
1.123 |
* for each non-null transformation of each entry. |
4667 |
dl |
1.119 |
* |
4668 |
|
|
* @param map the map |
4669 |
|
|
* @param transformer a function returning the transformation |
4670 |
|
|
* for an element, or null of there is no transformation (in |
4671 |
|
|
* which case the action is not applied). |
4672 |
|
|
* @param action the action |
4673 |
|
|
*/ |
4674 |
jsr166 |
1.120 |
public static <K,V,U> ForkJoinTask<Void> forEachEntry |
4675 |
dl |
1.119 |
(ConcurrentHashMap<K,V> map, |
4676 |
|
|
Fun<Map.Entry<K,V>, ? extends U> transformer, |
4677 |
|
|
Action<U> action) { |
4678 |
|
|
if (transformer == null || action == null) |
4679 |
|
|
throw new NullPointerException(); |
4680 |
|
|
return new ForEachTransformedEntryTask<K,V,U> |
4681 |
|
|
(map, transformer, action); |
4682 |
|
|
} |
4683 |
|
|
|
4684 |
|
|
/** |
4685 |
|
|
* Returns a task that when invoked, returns a non-null result |
4686 |
|
|
* from applying the given search function on each entry, or |
4687 |
dl |
1.126 |
* null if none. Upon success, further element processing is |
4688 |
|
|
* suppressed and the results of any other parallel |
4689 |
|
|
* invocations of the search function are ignored. |
4690 |
dl |
1.119 |
* |
4691 |
|
|
* @param map the map |
4692 |
|
|
* @param searchFunction a function returning a non-null |
4693 |
|
|
* result on success, else null |
4694 |
|
|
* @return the task |
4695 |
|
|
* |
4696 |
|
|
*/ |
4697 |
|
|
public static <K,V,U> ForkJoinTask<U> searchEntries |
4698 |
|
|
(ConcurrentHashMap<K,V> map, |
4699 |
|
|
Fun<Map.Entry<K,V>, ? extends U> searchFunction) { |
4700 |
|
|
if (searchFunction == null) throw new NullPointerException(); |
4701 |
|
|
return new SearchEntriesTask<K,V,U> |
4702 |
|
|
(map, searchFunction, |
4703 |
|
|
new AtomicReference<U>()); |
4704 |
|
|
} |
4705 |
|
|
|
4706 |
|
|
/** |
4707 |
|
|
* Returns a task that when invoked, returns the result of |
4708 |
|
|
* accumulating all entries using the given reducer to combine |
4709 |
|
|
* values, or null if none. |
4710 |
|
|
* |
4711 |
|
|
* @param map the map |
4712 |
|
|
* @param reducer a commutative associative combining function |
4713 |
|
|
* @return the task |
4714 |
|
|
*/ |
4715 |
|
|
public static <K,V> ForkJoinTask<Map.Entry<K,V>> reduceEntries |
4716 |
|
|
(ConcurrentHashMap<K,V> map, |
4717 |
|
|
BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) { |
4718 |
|
|
if (reducer == null) throw new NullPointerException(); |
4719 |
|
|
return new ReduceEntriesTask<K,V> |
4720 |
|
|
(map, reducer); |
4721 |
|
|
} |
4722 |
|
|
|
4723 |
|
|
/** |
4724 |
|
|
* Returns a task that when invoked, returns the result of |
4725 |
|
|
* accumulating the given transformation of all entries using the |
4726 |
|
|
* given reducer to combine values, or null if none. |
4727 |
|
|
* |
4728 |
|
|
* @param map the map |
4729 |
|
|
* @param transformer a function returning the transformation |
4730 |
|
|
* for an element, or null of there is no transformation (in |
4731 |
|
|
* which case it is not combined). |
4732 |
|
|
* @param reducer a commutative associative combining function |
4733 |
|
|
* @return the task |
4734 |
|
|
*/ |
4735 |
|
|
public static <K,V,U> ForkJoinTask<U> reduceEntries |
4736 |
|
|
(ConcurrentHashMap<K,V> map, |
4737 |
|
|
Fun<Map.Entry<K,V>, ? extends U> transformer, |
4738 |
|
|
BiFun<? super U, ? super U, ? extends U> reducer) { |
4739 |
|
|
if (transformer == null || reducer == null) |
4740 |
|
|
throw new NullPointerException(); |
4741 |
|
|
return new MapReduceEntriesTask<K,V,U> |
4742 |
|
|
(map, transformer, reducer); |
4743 |
|
|
} |
4744 |
|
|
|
4745 |
|
|
/** |
4746 |
|
|
* Returns a task that when invoked, returns the result of |
4747 |
|
|
* accumulating the given transformation of all entries using the |
4748 |
|
|
* given reducer to combine values, and the given basis as an |
4749 |
|
|
* identity value. |
4750 |
|
|
* |
4751 |
|
|
* @param map the map |
4752 |
|
|
* @param transformer a function returning the transformation |
4753 |
|
|
* for an element |
4754 |
|
|
* @param basis the identity (initial default value) for the reduction |
4755 |
|
|
* @param reducer a commutative associative combining function |
4756 |
|
|
* @return the task |
4757 |
|
|
*/ |
4758 |
|
|
public static <K,V> ForkJoinTask<Double> reduceEntriesToDouble |
4759 |
|
|
(ConcurrentHashMap<K,V> map, |
4760 |
|
|
ObjectToDouble<Map.Entry<K,V>> transformer, |
4761 |
|
|
double basis, |
4762 |
|
|
DoubleByDoubleToDouble reducer) { |
4763 |
|
|
if (transformer == null || reducer == null) |
4764 |
|
|
throw new NullPointerException(); |
4765 |
|
|
return new MapReduceEntriesToDoubleTask<K,V> |
4766 |
|
|
(map, transformer, basis, reducer); |
4767 |
|
|
} |
4768 |
|
|
|
4769 |
|
|
/** |
4770 |
|
|
* Returns a task that when invoked, returns the result of |
4771 |
|
|
* accumulating the given transformation of all entries using the |
4772 |
|
|
* given reducer to combine values, and the given basis as an |
4773 |
|
|
* identity value. |
4774 |
|
|
* |
4775 |
|
|
* @param map the map |
4776 |
|
|
* @param transformer a function returning the transformation |
4777 |
|
|
* for an element |
4778 |
|
|
* @param basis the identity (initial default value) for the reduction |
4779 |
|
|
* @param reducer a commutative associative combining function |
4780 |
|
|
* @return the task |
4781 |
|
|
*/ |
4782 |
|
|
public static <K,V> ForkJoinTask<Long> reduceEntriesToLong |
4783 |
|
|
(ConcurrentHashMap<K,V> map, |
4784 |
|
|
ObjectToLong<Map.Entry<K,V>> transformer, |
4785 |
|
|
long basis, |
4786 |
|
|
LongByLongToLong reducer) { |
4787 |
|
|
if (transformer == null || reducer == null) |
4788 |
|
|
throw new NullPointerException(); |
4789 |
|
|
return new MapReduceEntriesToLongTask<K,V> |
4790 |
|
|
(map, transformer, basis, reducer); |
4791 |
|
|
} |
4792 |
|
|
|
4793 |
|
|
/** |
4794 |
|
|
* Returns a task that when invoked, returns the result of |
4795 |
|
|
* accumulating the given transformation of all entries using the |
4796 |
|
|
* given reducer to combine values, and the given basis as an |
4797 |
|
|
* identity value. |
4798 |
|
|
* |
4799 |
|
|
* @param map the map |
4800 |
|
|
* @param transformer a function returning the transformation |
4801 |
|
|
* for an element |
4802 |
|
|
* @param basis the identity (initial default value) for the reduction |
4803 |
|
|
* @param reducer a commutative associative combining function |
4804 |
|
|
* @return the task |
4805 |
|
|
*/ |
4806 |
|
|
public static <K,V> ForkJoinTask<Integer> reduceEntriesToInt |
4807 |
|
|
(ConcurrentHashMap<K,V> map, |
4808 |
|
|
ObjectToInt<Map.Entry<K,V>> transformer, |
4809 |
|
|
int basis, |
4810 |
|
|
IntByIntToInt reducer) { |
4811 |
|
|
if (transformer == null || reducer == null) |
4812 |
|
|
throw new NullPointerException(); |
4813 |
|
|
return new MapReduceEntriesToIntTask<K,V> |
4814 |
|
|
(map, transformer, basis, reducer); |
4815 |
|
|
} |
4816 |
|
|
} |
4817 |
|
|
|
4818 |
|
|
// ------------------------------------------------------- |
4819 |
|
|
|
4820 |
|
|
/** |
4821 |
|
|
* Base for FJ tasks for bulk operations. This adds a variant of |
4822 |
jsr166 |
1.122 |
* CountedCompleters and some split and merge bookkeeping to |
4823 |
dl |
1.119 |
* iterator functionality. The forEach and reduce methods are |
4824 |
|
|
* similar to those illustrated in CountedCompleter documentation, |
4825 |
|
|
* except that bottom-up reduction completions perform them within |
4826 |
|
|
* their compute methods. The search methods are like forEach |
4827 |
|
|
* except they continually poll for success and exit early. Also, |
4828 |
|
|
* exceptions are handled in a simpler manner, by just trying to |
4829 |
|
|
* complete root task exceptionally. |
4830 |
|
|
*/ |
4831 |
dl |
1.126 |
@SuppressWarnings("serial") |
4832 |
dl |
1.119 |
static abstract class BulkTask<K,V,R> extends Traverser<K,V,R> { |
4833 |
|
|
final BulkTask<K,V,?> parent; // completion target |
4834 |
|
|
int batch; // split control |
4835 |
|
|
int pending; // completion control |
4836 |
|
|
|
4837 |
|
|
/** Constructor for root tasks */ |
4838 |
|
|
BulkTask(ConcurrentHashMap<K,V> map) { |
4839 |
|
|
super(map); |
4840 |
|
|
this.parent = null; |
4841 |
|
|
this.batch = -1; // force call to batch() on execution |
4842 |
|
|
} |
4843 |
|
|
|
4844 |
|
|
/** Constructor for subtasks */ |
4845 |
|
|
BulkTask(BulkTask<K,V,?> parent, int batch, boolean split) { |
4846 |
|
|
super(parent, split); |
4847 |
|
|
this.parent = parent; |
4848 |
|
|
this.batch = batch; |
4849 |
|
|
} |
4850 |
|
|
|
4851 |
|
|
// FJ methods |
4852 |
|
|
|
4853 |
|
|
/** |
4854 |
jsr166 |
1.123 |
* Propagates completion. Note that all reduce actions |
4855 |
dl |
1.119 |
* bypass this method to combine while completing. |
4856 |
|
|
*/ |
4857 |
|
|
final void tryComplete() { |
4858 |
|
|
BulkTask<K,V,?> a = this, s = a; |
4859 |
|
|
for (int c;;) { |
4860 |
|
|
if ((c = a.pending) == 0) { |
4861 |
|
|
if ((a = (s = a).parent) == null) { |
4862 |
|
|
s.quietlyComplete(); |
4863 |
|
|
break; |
4864 |
|
|
} |
4865 |
|
|
} |
4866 |
|
|
else if (U.compareAndSwapInt(a, PENDING, c, c - 1)) |
4867 |
|
|
break; |
4868 |
|
|
} |
4869 |
|
|
} |
4870 |
|
|
|
4871 |
|
|
/** |
4872 |
jsr166 |
1.123 |
* Forces root task to throw exception unless already complete. |
4873 |
dl |
1.119 |
*/ |
4874 |
|
|
final void tryAbortComputation(Throwable ex) { |
4875 |
|
|
for (BulkTask<K,V,?> a = this;;) { |
4876 |
|
|
BulkTask<K,V,?> p = a.parent; |
4877 |
|
|
if (p == null) { |
4878 |
|
|
a.completeExceptionally(ex); |
4879 |
|
|
break; |
4880 |
|
|
} |
4881 |
|
|
a = p; |
4882 |
|
|
} |
4883 |
|
|
} |
4884 |
|
|
|
4885 |
|
|
public final boolean exec() { |
4886 |
|
|
try { |
4887 |
|
|
compute(); |
4888 |
|
|
} |
4889 |
jsr166 |
1.120 |
catch (Throwable ex) { |
4890 |
dl |
1.119 |
tryAbortComputation(ex); |
4891 |
|
|
} |
4892 |
|
|
return false; |
4893 |
|
|
} |
4894 |
|
|
|
4895 |
|
|
public abstract void compute(); |
4896 |
|
|
|
4897 |
|
|
// utilities |
4898 |
|
|
|
4899 |
|
|
/** CompareAndSet pending count */ |
4900 |
|
|
final boolean casPending(int cmp, int val) { |
4901 |
|
|
return U.compareAndSwapInt(this, PENDING, cmp, val); |
4902 |
|
|
} |
4903 |
|
|
|
4904 |
|
|
/** |
4905 |
jsr166 |
1.123 |
* Returns approx exp2 of the number of times (minus one) to |
4906 |
dl |
1.119 |
* split task by two before executing leaf action. This value |
4907 |
|
|
* is faster to compute and more convenient to use as a guide |
4908 |
|
|
* to splitting than is the depth, since it is used while |
4909 |
|
|
* dividing by two anyway. |
4910 |
|
|
*/ |
4911 |
|
|
final int batch() { |
4912 |
|
|
int b = batch; |
4913 |
|
|
if (b < 0) { |
4914 |
|
|
long n = map.counter.sum(); |
4915 |
|
|
int sp = getPool().getParallelism() << 3; // slack of 8 |
4916 |
jsr166 |
1.120 |
b = batch = (n <= 0L) ? 0 : (n < (long)sp) ? (int)n : sp; |
4917 |
dl |
1.119 |
} |
4918 |
|
|
return b; |
4919 |
|
|
} |
4920 |
|
|
|
4921 |
|
|
/** |
4922 |
|
|
* Error message for hoisted null checks of functions |
4923 |
|
|
*/ |
4924 |
|
|
static final String NullFunctionMessage = |
4925 |
|
|
"Unexpected null function"; |
4926 |
|
|
|
4927 |
|
|
/** |
4928 |
jsr166 |
1.123 |
* Returns exportable snapshot entry. |
4929 |
dl |
1.119 |
*/ |
4930 |
|
|
static <K,V> AbstractMap.SimpleEntry<K,V> entryFor(K k, V v) { |
4931 |
dl |
1.126 |
return new AbstractMap.SimpleEntry<K,V>(k, v); |
4932 |
dl |
1.119 |
} |
4933 |
|
|
|
4934 |
|
|
// Unsafe mechanics |
4935 |
|
|
private static final sun.misc.Unsafe U; |
4936 |
|
|
private static final long PENDING; |
4937 |
|
|
static { |
4938 |
|
|
try { |
4939 |
|
|
U = sun.misc.Unsafe.getUnsafe(); |
4940 |
|
|
PENDING = U.objectFieldOffset |
4941 |
|
|
(BulkTask.class.getDeclaredField("pending")); |
4942 |
|
|
} catch (Exception e) { |
4943 |
|
|
throw new Error(e); |
4944 |
|
|
} |
4945 |
|
|
} |
4946 |
|
|
} |
4947 |
|
|
|
4948 |
|
|
/* |
4949 |
|
|
* Task classes. Coded in a regular but ugly format/style to |
4950 |
|
|
* simplify checks that each variant differs in the right way from |
4951 |
|
|
* others. |
4952 |
|
|
*/ |
4953 |
|
|
|
4954 |
dl |
1.126 |
@SuppressWarnings("serial") |
4955 |
dl |
1.119 |
static final class ForEachKeyTask<K,V> |
4956 |
|
|
extends BulkTask<K,V,Void> { |
4957 |
|
|
final Action<K> action; |
4958 |
|
|
ForEachKeyTask |
4959 |
|
|
(ConcurrentHashMap<K,V> m, |
4960 |
|
|
Action<K> action) { |
4961 |
|
|
super(m); |
4962 |
|
|
this.action = action; |
4963 |
|
|
} |
4964 |
|
|
ForEachKeyTask |
4965 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
4966 |
|
|
Action<K> action) { |
4967 |
|
|
super(p, b, split); |
4968 |
|
|
this.action = action; |
4969 |
|
|
} |
4970 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
4971 |
dl |
1.119 |
final Action<K> action = this.action; |
4972 |
|
|
if (action == null) |
4973 |
|
|
throw new Error(NullFunctionMessage); |
4974 |
|
|
int b = batch(), c; |
4975 |
|
|
while (b > 1 && baseIndex != baseLimit) { |
4976 |
|
|
do {} while (!casPending(c = pending, c+1)); |
4977 |
|
|
new ForEachKeyTask<K,V>(this, b >>>= 1, true, action).fork(); |
4978 |
|
|
} |
4979 |
|
|
while (advance() != null) |
4980 |
|
|
action.apply((K)nextKey); |
4981 |
|
|
tryComplete(); |
4982 |
|
|
} |
4983 |
|
|
} |
4984 |
|
|
|
4985 |
dl |
1.126 |
@SuppressWarnings("serial") |
4986 |
dl |
1.119 |
static final class ForEachValueTask<K,V> |
4987 |
|
|
extends BulkTask<K,V,Void> { |
4988 |
|
|
final Action<V> action; |
4989 |
|
|
ForEachValueTask |
4990 |
|
|
(ConcurrentHashMap<K,V> m, |
4991 |
|
|
Action<V> action) { |
4992 |
|
|
super(m); |
4993 |
|
|
this.action = action; |
4994 |
|
|
} |
4995 |
|
|
ForEachValueTask |
4996 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
4997 |
|
|
Action<V> action) { |
4998 |
|
|
super(p, b, split); |
4999 |
|
|
this.action = action; |
5000 |
|
|
} |
5001 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
5002 |
dl |
1.119 |
final Action<V> action = this.action; |
5003 |
|
|
if (action == null) |
5004 |
|
|
throw new Error(NullFunctionMessage); |
5005 |
|
|
int b = batch(), c; |
5006 |
|
|
while (b > 1 && baseIndex != baseLimit) { |
5007 |
|
|
do {} while (!casPending(c = pending, c+1)); |
5008 |
|
|
new ForEachValueTask<K,V>(this, b >>>= 1, true, action).fork(); |
5009 |
|
|
} |
5010 |
|
|
Object v; |
5011 |
|
|
while ((v = advance()) != null) |
5012 |
|
|
action.apply((V)v); |
5013 |
|
|
tryComplete(); |
5014 |
|
|
} |
5015 |
|
|
} |
5016 |
|
|
|
5017 |
dl |
1.126 |
@SuppressWarnings("serial") |
5018 |
dl |
1.119 |
static final class ForEachEntryTask<K,V> |
5019 |
|
|
extends BulkTask<K,V,Void> { |
5020 |
|
|
final Action<Entry<K,V>> action; |
5021 |
|
|
ForEachEntryTask |
5022 |
|
|
(ConcurrentHashMap<K,V> m, |
5023 |
|
|
Action<Entry<K,V>> action) { |
5024 |
|
|
super(m); |
5025 |
|
|
this.action = action; |
5026 |
|
|
} |
5027 |
|
|
ForEachEntryTask |
5028 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
5029 |
|
|
Action<Entry<K,V>> action) { |
5030 |
|
|
super(p, b, split); |
5031 |
|
|
this.action = action; |
5032 |
|
|
} |
5033 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
5034 |
dl |
1.119 |
final Action<Entry<K,V>> action = this.action; |
5035 |
|
|
if (action == null) |
5036 |
|
|
throw new Error(NullFunctionMessage); |
5037 |
|
|
int b = batch(), c; |
5038 |
|
|
while (b > 1 && baseIndex != baseLimit) { |
5039 |
|
|
do {} while (!casPending(c = pending, c+1)); |
5040 |
|
|
new ForEachEntryTask<K,V>(this, b >>>= 1, true, action).fork(); |
5041 |
|
|
} |
5042 |
|
|
Object v; |
5043 |
|
|
while ((v = advance()) != null) |
5044 |
|
|
action.apply(entryFor((K)nextKey, (V)v)); |
5045 |
|
|
tryComplete(); |
5046 |
|
|
} |
5047 |
|
|
} |
5048 |
|
|
|
5049 |
dl |
1.126 |
@SuppressWarnings("serial") |
5050 |
dl |
1.119 |
static final class ForEachMappingTask<K,V> |
5051 |
|
|
extends BulkTask<K,V,Void> { |
5052 |
|
|
final BiAction<K,V> action; |
5053 |
|
|
ForEachMappingTask |
5054 |
|
|
(ConcurrentHashMap<K,V> m, |
5055 |
|
|
BiAction<K,V> action) { |
5056 |
|
|
super(m); |
5057 |
|
|
this.action = action; |
5058 |
|
|
} |
5059 |
|
|
ForEachMappingTask |
5060 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
5061 |
|
|
BiAction<K,V> action) { |
5062 |
|
|
super(p, b, split); |
5063 |
|
|
this.action = action; |
5064 |
|
|
} |
5065 |
|
|
|
5066 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
5067 |
dl |
1.119 |
final BiAction<K,V> action = this.action; |
5068 |
|
|
if (action == null) |
5069 |
|
|
throw new Error(NullFunctionMessage); |
5070 |
|
|
int b = batch(), c; |
5071 |
|
|
while (b > 1 && baseIndex != baseLimit) { |
5072 |
|
|
do {} while (!casPending(c = pending, c+1)); |
5073 |
|
|
new ForEachMappingTask<K,V>(this, b >>>= 1, true, |
5074 |
|
|
action).fork(); |
5075 |
|
|
} |
5076 |
|
|
Object v; |
5077 |
|
|
while ((v = advance()) != null) |
5078 |
|
|
action.apply((K)nextKey, (V)v); |
5079 |
|
|
tryComplete(); |
5080 |
|
|
} |
5081 |
|
|
} |
5082 |
|
|
|
5083 |
dl |
1.126 |
@SuppressWarnings("serial") |
5084 |
dl |
1.119 |
static final class ForEachTransformedKeyTask<K,V,U> |
5085 |
|
|
extends BulkTask<K,V,Void> { |
5086 |
|
|
final Fun<? super K, ? extends U> transformer; |
5087 |
|
|
final Action<U> action; |
5088 |
|
|
ForEachTransformedKeyTask |
5089 |
|
|
(ConcurrentHashMap<K,V> m, |
5090 |
|
|
Fun<? super K, ? extends U> transformer, |
5091 |
|
|
Action<U> action) { |
5092 |
|
|
super(m); |
5093 |
|
|
this.transformer = transformer; |
5094 |
|
|
this.action = action; |
5095 |
|
|
|
5096 |
|
|
} |
5097 |
|
|
ForEachTransformedKeyTask |
5098 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
5099 |
|
|
Fun<? super K, ? extends U> transformer, |
5100 |
|
|
Action<U> action) { |
5101 |
|
|
super(p, b, split); |
5102 |
|
|
this.transformer = transformer; |
5103 |
|
|
this.action = action; |
5104 |
|
|
} |
5105 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
5106 |
dl |
1.119 |
final Fun<? super K, ? extends U> transformer = |
5107 |
|
|
this.transformer; |
5108 |
|
|
final Action<U> action = this.action; |
5109 |
|
|
if (transformer == null || action == null) |
5110 |
|
|
throw new Error(NullFunctionMessage); |
5111 |
|
|
int b = batch(), c; |
5112 |
|
|
while (b > 1 && baseIndex != baseLimit) { |
5113 |
|
|
do {} while (!casPending(c = pending, c+1)); |
5114 |
|
|
new ForEachTransformedKeyTask<K,V,U> |
5115 |
|
|
(this, b >>>= 1, true, transformer, action).fork(); |
5116 |
|
|
} |
5117 |
|
|
U u; |
5118 |
|
|
while (advance() != null) { |
5119 |
|
|
if ((u = transformer.apply((K)nextKey)) != null) |
5120 |
|
|
action.apply(u); |
5121 |
|
|
} |
5122 |
|
|
tryComplete(); |
5123 |
|
|
} |
5124 |
|
|
} |
5125 |
|
|
|
5126 |
dl |
1.126 |
@SuppressWarnings("serial") |
5127 |
dl |
1.119 |
static final class ForEachTransformedValueTask<K,V,U> |
5128 |
|
|
extends BulkTask<K,V,Void> { |
5129 |
|
|
final Fun<? super V, ? extends U> transformer; |
5130 |
|
|
final Action<U> action; |
5131 |
|
|
ForEachTransformedValueTask |
5132 |
|
|
(ConcurrentHashMap<K,V> m, |
5133 |
|
|
Fun<? super V, ? extends U> transformer, |
5134 |
|
|
Action<U> action) { |
5135 |
|
|
super(m); |
5136 |
|
|
this.transformer = transformer; |
5137 |
|
|
this.action = action; |
5138 |
|
|
|
5139 |
|
|
} |
5140 |
|
|
ForEachTransformedValueTask |
5141 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
5142 |
|
|
Fun<? super V, ? extends U> transformer, |
5143 |
|
|
Action<U> action) { |
5144 |
|
|
super(p, b, split); |
5145 |
|
|
this.transformer = transformer; |
5146 |
|
|
this.action = action; |
5147 |
|
|
} |
5148 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
5149 |
dl |
1.119 |
final Fun<? super V, ? extends U> transformer = |
5150 |
|
|
this.transformer; |
5151 |
|
|
final Action<U> action = this.action; |
5152 |
|
|
if (transformer == null || action == null) |
5153 |
|
|
throw new Error(NullFunctionMessage); |
5154 |
|
|
int b = batch(), c; |
5155 |
|
|
while (b > 1 && baseIndex != baseLimit) { |
5156 |
|
|
do {} while (!casPending(c = pending, c+1)); |
5157 |
|
|
new ForEachTransformedValueTask<K,V,U> |
5158 |
|
|
(this, b >>>= 1, true, transformer, action).fork(); |
5159 |
|
|
} |
5160 |
|
|
Object v; U u; |
5161 |
|
|
while ((v = advance()) != null) { |
5162 |
|
|
if ((u = transformer.apply((V)v)) != null) |
5163 |
|
|
action.apply(u); |
5164 |
|
|
} |
5165 |
|
|
tryComplete(); |
5166 |
|
|
} |
5167 |
tim |
1.1 |
} |
5168 |
|
|
|
5169 |
dl |
1.126 |
@SuppressWarnings("serial") |
5170 |
dl |
1.119 |
static final class ForEachTransformedEntryTask<K,V,U> |
5171 |
|
|
extends BulkTask<K,V,Void> { |
5172 |
|
|
final Fun<Map.Entry<K,V>, ? extends U> transformer; |
5173 |
|
|
final Action<U> action; |
5174 |
|
|
ForEachTransformedEntryTask |
5175 |
|
|
(ConcurrentHashMap<K,V> m, |
5176 |
|
|
Fun<Map.Entry<K,V>, ? extends U> transformer, |
5177 |
|
|
Action<U> action) { |
5178 |
|
|
super(m); |
5179 |
|
|
this.transformer = transformer; |
5180 |
|
|
this.action = action; |
5181 |
|
|
|
5182 |
|
|
} |
5183 |
|
|
ForEachTransformedEntryTask |
5184 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
5185 |
|
|
Fun<Map.Entry<K,V>, ? extends U> transformer, |
5186 |
|
|
Action<U> action) { |
5187 |
|
|
super(p, b, split); |
5188 |
|
|
this.transformer = transformer; |
5189 |
|
|
this.action = action; |
5190 |
|
|
} |
5191 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
5192 |
dl |
1.119 |
final Fun<Map.Entry<K,V>, ? extends U> transformer = |
5193 |
|
|
this.transformer; |
5194 |
|
|
final Action<U> action = this.action; |
5195 |
|
|
if (transformer == null || action == null) |
5196 |
|
|
throw new Error(NullFunctionMessage); |
5197 |
|
|
int b = batch(), c; |
5198 |
|
|
while (b > 1 && baseIndex != baseLimit) { |
5199 |
|
|
do {} while (!casPending(c = pending, c+1)); |
5200 |
|
|
new ForEachTransformedEntryTask<K,V,U> |
5201 |
|
|
(this, b >>>= 1, true, transformer, action).fork(); |
5202 |
|
|
} |
5203 |
|
|
Object v; U u; |
5204 |
|
|
while ((v = advance()) != null) { |
5205 |
|
|
if ((u = transformer.apply(entryFor((K)nextKey, (V)v))) != null) |
5206 |
|
|
action.apply(u); |
5207 |
|
|
} |
5208 |
|
|
tryComplete(); |
5209 |
|
|
} |
5210 |
tim |
1.1 |
} |
5211 |
|
|
|
5212 |
dl |
1.126 |
@SuppressWarnings("serial") |
5213 |
dl |
1.119 |
static final class ForEachTransformedMappingTask<K,V,U> |
5214 |
|
|
extends BulkTask<K,V,Void> { |
5215 |
|
|
final BiFun<? super K, ? super V, ? extends U> transformer; |
5216 |
|
|
final Action<U> action; |
5217 |
|
|
ForEachTransformedMappingTask |
5218 |
|
|
(ConcurrentHashMap<K,V> m, |
5219 |
|
|
BiFun<? super K, ? super V, ? extends U> transformer, |
5220 |
|
|
Action<U> action) { |
5221 |
|
|
super(m); |
5222 |
|
|
this.transformer = transformer; |
5223 |
|
|
this.action = action; |
5224 |
|
|
|
5225 |
|
|
} |
5226 |
|
|
ForEachTransformedMappingTask |
5227 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
5228 |
|
|
BiFun<? super K, ? super V, ? extends U> transformer, |
5229 |
|
|
Action<U> action) { |
5230 |
|
|
super(p, b, split); |
5231 |
|
|
this.transformer = transformer; |
5232 |
|
|
this.action = action; |
5233 |
|
|
} |
5234 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
5235 |
dl |
1.119 |
final BiFun<? super K, ? super V, ? extends U> transformer = |
5236 |
|
|
this.transformer; |
5237 |
|
|
final Action<U> action = this.action; |
5238 |
|
|
if (transformer == null || action == null) |
5239 |
|
|
throw new Error(NullFunctionMessage); |
5240 |
|
|
int b = batch(), c; |
5241 |
|
|
while (b > 1 && baseIndex != baseLimit) { |
5242 |
|
|
do {} while (!casPending(c = pending, c+1)); |
5243 |
|
|
new ForEachTransformedMappingTask<K,V,U> |
5244 |
|
|
(this, b >>>= 1, true, transformer, action).fork(); |
5245 |
|
|
} |
5246 |
|
|
Object v; U u; |
5247 |
|
|
while ((v = advance()) != null) { |
5248 |
|
|
if ((u = transformer.apply((K)nextKey, (V)v)) != null) |
5249 |
|
|
action.apply(u); |
5250 |
|
|
} |
5251 |
|
|
tryComplete(); |
5252 |
|
|
} |
5253 |
tim |
1.1 |
} |
5254 |
|
|
|
5255 |
dl |
1.126 |
@SuppressWarnings("serial") |
5256 |
dl |
1.119 |
static final class SearchKeysTask<K,V,U> |
5257 |
|
|
extends BulkTask<K,V,U> { |
5258 |
|
|
final Fun<? super K, ? extends U> searchFunction; |
5259 |
|
|
final AtomicReference<U> result; |
5260 |
|
|
SearchKeysTask |
5261 |
|
|
(ConcurrentHashMap<K,V> m, |
5262 |
|
|
Fun<? super K, ? extends U> searchFunction, |
5263 |
|
|
AtomicReference<U> result) { |
5264 |
|
|
super(m); |
5265 |
|
|
this.searchFunction = searchFunction; this.result = result; |
5266 |
|
|
} |
5267 |
|
|
SearchKeysTask |
5268 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
5269 |
|
|
Fun<? super K, ? extends U> searchFunction, |
5270 |
|
|
AtomicReference<U> result) { |
5271 |
|
|
super(p, b, split); |
5272 |
|
|
this.searchFunction = searchFunction; this.result = result; |
5273 |
|
|
} |
5274 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
5275 |
dl |
1.119 |
AtomicReference<U> result = this.result; |
5276 |
|
|
final Fun<? super K, ? extends U> searchFunction = |
5277 |
|
|
this.searchFunction; |
5278 |
|
|
if (searchFunction == null || result == null) |
5279 |
|
|
throw new Error(NullFunctionMessage); |
5280 |
|
|
int b = batch(), c; |
5281 |
|
|
while (b > 1 && baseIndex != baseLimit && result.get() == null) { |
5282 |
|
|
do {} while (!casPending(c = pending, c+1)); |
5283 |
|
|
new SearchKeysTask<K,V,U>(this, b >>>= 1, true, |
5284 |
|
|
searchFunction, result).fork(); |
5285 |
|
|
} |
5286 |
|
|
U u; |
5287 |
|
|
while (result.get() == null && advance() != null) { |
5288 |
|
|
if ((u = searchFunction.apply((K)nextKey)) != null) { |
5289 |
dl |
1.126 |
if (result.compareAndSet(null, u)) { |
5290 |
|
|
for (BulkTask<K,V,?> a = this, p;;) { |
5291 |
|
|
if ((p = a.parent) == null) { |
5292 |
|
|
a.quietlyComplete(); |
5293 |
|
|
break; |
5294 |
|
|
} |
5295 |
|
|
a = p; |
5296 |
|
|
} |
5297 |
|
|
} |
5298 |
dl |
1.119 |
break; |
5299 |
|
|
} |
5300 |
|
|
} |
5301 |
|
|
tryComplete(); |
5302 |
|
|
} |
5303 |
|
|
public final U getRawResult() { return result.get(); } |
5304 |
tim |
1.1 |
} |
5305 |
|
|
|
5306 |
dl |
1.126 |
@SuppressWarnings("serial") |
5307 |
dl |
1.119 |
static final class SearchValuesTask<K,V,U> |
5308 |
|
|
extends BulkTask<K,V,U> { |
5309 |
|
|
final Fun<? super V, ? extends U> searchFunction; |
5310 |
|
|
final AtomicReference<U> result; |
5311 |
|
|
SearchValuesTask |
5312 |
|
|
(ConcurrentHashMap<K,V> m, |
5313 |
|
|
Fun<? super V, ? extends U> searchFunction, |
5314 |
|
|
AtomicReference<U> result) { |
5315 |
|
|
super(m); |
5316 |
|
|
this.searchFunction = searchFunction; this.result = result; |
5317 |
|
|
} |
5318 |
|
|
SearchValuesTask |
5319 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
5320 |
|
|
Fun<? super V, ? extends U> searchFunction, |
5321 |
|
|
AtomicReference<U> result) { |
5322 |
|
|
super(p, b, split); |
5323 |
|
|
this.searchFunction = searchFunction; this.result = result; |
5324 |
|
|
} |
5325 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
5326 |
dl |
1.119 |
AtomicReference<U> result = this.result; |
5327 |
|
|
final Fun<? super V, ? extends U> searchFunction = |
5328 |
|
|
this.searchFunction; |
5329 |
|
|
if (searchFunction == null || result == null) |
5330 |
|
|
throw new Error(NullFunctionMessage); |
5331 |
|
|
int b = batch(), c; |
5332 |
|
|
while (b > 1 && baseIndex != baseLimit && result.get() == null) { |
5333 |
|
|
do {} while (!casPending(c = pending, c+1)); |
5334 |
|
|
new SearchValuesTask<K,V,U>(this, b >>>= 1, true, |
5335 |
|
|
searchFunction, result).fork(); |
5336 |
|
|
} |
5337 |
|
|
Object v; U u; |
5338 |
|
|
while (result.get() == null && (v = advance()) != null) { |
5339 |
|
|
if ((u = searchFunction.apply((V)v)) != null) { |
5340 |
dl |
1.126 |
if (result.compareAndSet(null, u)) { |
5341 |
|
|
for (BulkTask<K,V,?> a = this, p;;) { |
5342 |
|
|
if ((p = a.parent) == null) { |
5343 |
|
|
a.quietlyComplete(); |
5344 |
|
|
break; |
5345 |
|
|
} |
5346 |
|
|
a = p; |
5347 |
|
|
} |
5348 |
|
|
} |
5349 |
dl |
1.119 |
break; |
5350 |
|
|
} |
5351 |
|
|
} |
5352 |
|
|
tryComplete(); |
5353 |
|
|
} |
5354 |
|
|
public final U getRawResult() { return result.get(); } |
5355 |
|
|
} |
5356 |
tim |
1.11 |
|
5357 |
dl |
1.126 |
@SuppressWarnings("serial") |
5358 |
dl |
1.119 |
static final class SearchEntriesTask<K,V,U> |
5359 |
|
|
extends BulkTask<K,V,U> { |
5360 |
|
|
final Fun<Entry<K,V>, ? extends U> searchFunction; |
5361 |
|
|
final AtomicReference<U> result; |
5362 |
|
|
SearchEntriesTask |
5363 |
|
|
(ConcurrentHashMap<K,V> m, |
5364 |
|
|
Fun<Entry<K,V>, ? extends U> searchFunction, |
5365 |
|
|
AtomicReference<U> result) { |
5366 |
|
|
super(m); |
5367 |
|
|
this.searchFunction = searchFunction; this.result = result; |
5368 |
|
|
} |
5369 |
|
|
SearchEntriesTask |
5370 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
5371 |
|
|
Fun<Entry<K,V>, ? extends U> searchFunction, |
5372 |
|
|
AtomicReference<U> result) { |
5373 |
|
|
super(p, b, split); |
5374 |
|
|
this.searchFunction = searchFunction; this.result = result; |
5375 |
|
|
} |
5376 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
5377 |
dl |
1.119 |
AtomicReference<U> result = this.result; |
5378 |
|
|
final Fun<Entry<K,V>, ? extends U> searchFunction = |
5379 |
|
|
this.searchFunction; |
5380 |
|
|
if (searchFunction == null || result == null) |
5381 |
|
|
throw new Error(NullFunctionMessage); |
5382 |
|
|
int b = batch(), c; |
5383 |
|
|
while (b > 1 && baseIndex != baseLimit && result.get() == null) { |
5384 |
|
|
do {} while (!casPending(c = pending, c+1)); |
5385 |
|
|
new SearchEntriesTask<K,V,U>(this, b >>>= 1, true, |
5386 |
|
|
searchFunction, result).fork(); |
5387 |
|
|
} |
5388 |
|
|
Object v; U u; |
5389 |
|
|
while (result.get() == null && (v = advance()) != null) { |
5390 |
|
|
if ((u = searchFunction.apply(entryFor((K)nextKey, (V)v))) != null) { |
5391 |
dl |
1.126 |
if (result.compareAndSet(null, u)) { |
5392 |
|
|
for (BulkTask<K,V,?> a = this, p;;) { |
5393 |
|
|
if ((p = a.parent) == null) { |
5394 |
|
|
a.quietlyComplete(); |
5395 |
|
|
break; |
5396 |
|
|
} |
5397 |
|
|
a = p; |
5398 |
|
|
} |
5399 |
|
|
} |
5400 |
dl |
1.119 |
break; |
5401 |
|
|
} |
5402 |
|
|
} |
5403 |
|
|
tryComplete(); |
5404 |
|
|
} |
5405 |
|
|
public final U getRawResult() { return result.get(); } |
5406 |
|
|
} |
5407 |
tim |
1.1 |
|
5408 |
dl |
1.126 |
@SuppressWarnings("serial") |
5409 |
dl |
1.119 |
static final class SearchMappingsTask<K,V,U> |
5410 |
|
|
extends BulkTask<K,V,U> { |
5411 |
|
|
final BiFun<? super K, ? super V, ? extends U> searchFunction; |
5412 |
|
|
final AtomicReference<U> result; |
5413 |
|
|
SearchMappingsTask |
5414 |
|
|
(ConcurrentHashMap<K,V> m, |
5415 |
|
|
BiFun<? super K, ? super V, ? extends U> searchFunction, |
5416 |
|
|
AtomicReference<U> result) { |
5417 |
|
|
super(m); |
5418 |
|
|
this.searchFunction = searchFunction; this.result = result; |
5419 |
|
|
} |
5420 |
|
|
SearchMappingsTask |
5421 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
5422 |
|
|
BiFun<? super K, ? super V, ? extends U> searchFunction, |
5423 |
|
|
AtomicReference<U> result) { |
5424 |
|
|
super(p, b, split); |
5425 |
|
|
this.searchFunction = searchFunction; this.result = result; |
5426 |
|
|
} |
5427 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
5428 |
dl |
1.119 |
AtomicReference<U> result = this.result; |
5429 |
|
|
final BiFun<? super K, ? super V, ? extends U> searchFunction = |
5430 |
|
|
this.searchFunction; |
5431 |
|
|
if (searchFunction == null || result == null) |
5432 |
|
|
throw new Error(NullFunctionMessage); |
5433 |
|
|
int b = batch(), c; |
5434 |
|
|
while (b > 1 && baseIndex != baseLimit && result.get() == null) { |
5435 |
|
|
do {} while (!casPending(c = pending, c+1)); |
5436 |
|
|
new SearchMappingsTask<K,V,U>(this, b >>>= 1, true, |
5437 |
|
|
searchFunction, result).fork(); |
5438 |
|
|
} |
5439 |
|
|
Object v; U u; |
5440 |
|
|
while (result.get() == null && (v = advance()) != null) { |
5441 |
|
|
if ((u = searchFunction.apply((K)nextKey, (V)v)) != null) { |
5442 |
dl |
1.126 |
if (result.compareAndSet(null, u)) { |
5443 |
|
|
for (BulkTask<K,V,?> a = this, p;;) { |
5444 |
|
|
if ((p = a.parent) == null) { |
5445 |
|
|
a.quietlyComplete(); |
5446 |
|
|
break; |
5447 |
|
|
} |
5448 |
|
|
a = p; |
5449 |
|
|
} |
5450 |
|
|
} |
5451 |
dl |
1.119 |
break; |
5452 |
|
|
} |
5453 |
|
|
} |
5454 |
|
|
tryComplete(); |
5455 |
tim |
1.1 |
} |
5456 |
dl |
1.119 |
public final U getRawResult() { return result.get(); } |
5457 |
|
|
} |
5458 |
tim |
1.1 |
|
5459 |
dl |
1.126 |
@SuppressWarnings("serial") |
5460 |
dl |
1.119 |
static final class ReduceKeysTask<K,V> |
5461 |
|
|
extends BulkTask<K,V,K> { |
5462 |
|
|
final BiFun<? super K, ? super K, ? extends K> reducer; |
5463 |
|
|
K result; |
5464 |
|
|
ReduceKeysTask<K,V> sibling; |
5465 |
|
|
ReduceKeysTask |
5466 |
|
|
(ConcurrentHashMap<K,V> m, |
5467 |
|
|
BiFun<? super K, ? super K, ? extends K> reducer) { |
5468 |
|
|
super(m); |
5469 |
|
|
this.reducer = reducer; |
5470 |
|
|
} |
5471 |
|
|
ReduceKeysTask |
5472 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
5473 |
|
|
BiFun<? super K, ? super K, ? extends K> reducer) { |
5474 |
|
|
super(p, b, split); |
5475 |
|
|
this.reducer = reducer; |
5476 |
|
|
} |
5477 |
|
|
|
5478 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
5479 |
dl |
1.119 |
ReduceKeysTask<K,V> t = this; |
5480 |
|
|
final BiFun<? super K, ? super K, ? extends K> reducer = |
5481 |
|
|
this.reducer; |
5482 |
|
|
if (reducer == null) |
5483 |
|
|
throw new Error(NullFunctionMessage); |
5484 |
|
|
int b = batch(); |
5485 |
|
|
while (b > 1 && t.baseIndex != t.baseLimit) { |
5486 |
|
|
b >>>= 1; |
5487 |
|
|
t.pending = 1; |
5488 |
|
|
ReduceKeysTask<K,V> rt = |
5489 |
|
|
new ReduceKeysTask<K,V> |
5490 |
|
|
(t, b, true, reducer); |
5491 |
|
|
t = new ReduceKeysTask<K,V> |
5492 |
|
|
(t, b, false, reducer); |
5493 |
|
|
t.sibling = rt; |
5494 |
|
|
rt.sibling = t; |
5495 |
|
|
rt.fork(); |
5496 |
|
|
} |
5497 |
|
|
K r = null; |
5498 |
|
|
while (t.advance() != null) { |
5499 |
|
|
K u = (K)t.nextKey; |
5500 |
|
|
r = (r == null) ? u : reducer.apply(r, u); |
5501 |
|
|
} |
5502 |
|
|
t.result = r; |
5503 |
dl |
1.99 |
for (;;) { |
5504 |
dl |
1.119 |
int c; BulkTask<K,V,?> par; ReduceKeysTask<K,V> s, p; K u; |
5505 |
|
|
if ((par = t.parent) == null || |
5506 |
|
|
!(par instanceof ReduceKeysTask)) { |
5507 |
|
|
t.quietlyComplete(); |
5508 |
|
|
break; |
5509 |
dl |
1.99 |
} |
5510 |
dl |
1.119 |
else if ((c = (p = (ReduceKeysTask<K,V>)par).pending) == 0) { |
5511 |
|
|
if ((s = t.sibling) != null && (u = s.result) != null) |
5512 |
|
|
r = (r == null) ? u : reducer.apply(r, u); |
5513 |
|
|
(t = p).result = r; |
5514 |
tim |
1.1 |
} |
5515 |
dl |
1.119 |
else if (p.casPending(c, 0)) |
5516 |
dl |
1.99 |
break; |
5517 |
tim |
1.1 |
} |
5518 |
|
|
} |
5519 |
dl |
1.119 |
public final K getRawResult() { return result; } |
5520 |
|
|
} |
5521 |
tim |
1.1 |
|
5522 |
dl |
1.126 |
@SuppressWarnings("serial") |
5523 |
dl |
1.119 |
static final class ReduceValuesTask<K,V> |
5524 |
|
|
extends BulkTask<K,V,V> { |
5525 |
|
|
final BiFun<? super V, ? super V, ? extends V> reducer; |
5526 |
|
|
V result; |
5527 |
|
|
ReduceValuesTask<K,V> sibling; |
5528 |
|
|
ReduceValuesTask |
5529 |
|
|
(ConcurrentHashMap<K,V> m, |
5530 |
|
|
BiFun<? super V, ? super V, ? extends V> reducer) { |
5531 |
|
|
super(m); |
5532 |
|
|
this.reducer = reducer; |
5533 |
|
|
} |
5534 |
|
|
ReduceValuesTask |
5535 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
5536 |
|
|
BiFun<? super V, ? super V, ? extends V> reducer) { |
5537 |
|
|
super(p, b, split); |
5538 |
|
|
this.reducer = reducer; |
5539 |
|
|
} |
5540 |
|
|
|
5541 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
5542 |
dl |
1.119 |
ReduceValuesTask<K,V> t = this; |
5543 |
|
|
final BiFun<? super V, ? super V, ? extends V> reducer = |
5544 |
|
|
this.reducer; |
5545 |
|
|
if (reducer == null) |
5546 |
|
|
throw new Error(NullFunctionMessage); |
5547 |
|
|
int b = batch(); |
5548 |
|
|
while (b > 1 && t.baseIndex != t.baseLimit) { |
5549 |
|
|
b >>>= 1; |
5550 |
|
|
t.pending = 1; |
5551 |
|
|
ReduceValuesTask<K,V> rt = |
5552 |
|
|
new ReduceValuesTask<K,V> |
5553 |
|
|
(t, b, true, reducer); |
5554 |
|
|
t = new ReduceValuesTask<K,V> |
5555 |
|
|
(t, b, false, reducer); |
5556 |
|
|
t.sibling = rt; |
5557 |
|
|
rt.sibling = t; |
5558 |
|
|
rt.fork(); |
5559 |
|
|
} |
5560 |
|
|
V r = null; |
5561 |
|
|
Object v; |
5562 |
|
|
while ((v = t.advance()) != null) { |
5563 |
|
|
V u = (V)v; |
5564 |
|
|
r = (r == null) ? u : reducer.apply(r, u); |
5565 |
|
|
} |
5566 |
|
|
t.result = r; |
5567 |
|
|
for (;;) { |
5568 |
|
|
int c; BulkTask<K,V,?> par; ReduceValuesTask<K,V> s, p; V u; |
5569 |
|
|
if ((par = t.parent) == null || |
5570 |
|
|
!(par instanceof ReduceValuesTask)) { |
5571 |
|
|
t.quietlyComplete(); |
5572 |
|
|
break; |
5573 |
|
|
} |
5574 |
|
|
else if ((c = (p = (ReduceValuesTask<K,V>)par).pending) == 0) { |
5575 |
|
|
if ((s = t.sibling) != null && (u = s.result) != null) |
5576 |
|
|
r = (r == null) ? u : reducer.apply(r, u); |
5577 |
|
|
(t = p).result = r; |
5578 |
|
|
} |
5579 |
|
|
else if (p.casPending(c, 0)) |
5580 |
|
|
break; |
5581 |
|
|
} |
5582 |
tim |
1.1 |
} |
5583 |
dl |
1.119 |
public final V getRawResult() { return result; } |
5584 |
|
|
} |
5585 |
tim |
1.1 |
|
5586 |
dl |
1.126 |
@SuppressWarnings("serial") |
5587 |
dl |
1.119 |
static final class ReduceEntriesTask<K,V> |
5588 |
|
|
extends BulkTask<K,V,Map.Entry<K,V>> { |
5589 |
|
|
final BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer; |
5590 |
|
|
Map.Entry<K,V> result; |
5591 |
|
|
ReduceEntriesTask<K,V> sibling; |
5592 |
|
|
ReduceEntriesTask |
5593 |
|
|
(ConcurrentHashMap<K,V> m, |
5594 |
|
|
BiFun<Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) { |
5595 |
|
|
super(m); |
5596 |
|
|
this.reducer = reducer; |
5597 |
|
|
} |
5598 |
|
|
ReduceEntriesTask |
5599 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
5600 |
|
|
BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) { |
5601 |
|
|
super(p, b, split); |
5602 |
|
|
this.reducer = reducer; |
5603 |
|
|
} |
5604 |
|
|
|
5605 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
5606 |
dl |
1.119 |
ReduceEntriesTask<K,V> t = this; |
5607 |
|
|
final BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer = |
5608 |
|
|
this.reducer; |
5609 |
|
|
if (reducer == null) |
5610 |
|
|
throw new Error(NullFunctionMessage); |
5611 |
|
|
int b = batch(); |
5612 |
|
|
while (b > 1 && t.baseIndex != t.baseLimit) { |
5613 |
|
|
b >>>= 1; |
5614 |
|
|
t.pending = 1; |
5615 |
|
|
ReduceEntriesTask<K,V> rt = |
5616 |
|
|
new ReduceEntriesTask<K,V> |
5617 |
|
|
(t, b, true, reducer); |
5618 |
|
|
t = new ReduceEntriesTask<K,V> |
5619 |
|
|
(t, b, false, reducer); |
5620 |
|
|
t.sibling = rt; |
5621 |
|
|
rt.sibling = t; |
5622 |
|
|
rt.fork(); |
5623 |
|
|
} |
5624 |
|
|
Map.Entry<K,V> r = null; |
5625 |
|
|
Object v; |
5626 |
|
|
while ((v = t.advance()) != null) { |
5627 |
|
|
Map.Entry<K,V> u = entryFor((K)t.nextKey, (V)v); |
5628 |
|
|
r = (r == null) ? u : reducer.apply(r, u); |
5629 |
|
|
} |
5630 |
|
|
t.result = r; |
5631 |
|
|
for (;;) { |
5632 |
|
|
int c; BulkTask<K,V,?> par; ReduceEntriesTask<K,V> s, p; |
5633 |
|
|
Map.Entry<K,V> u; |
5634 |
|
|
if ((par = t.parent) == null || |
5635 |
|
|
!(par instanceof ReduceEntriesTask)) { |
5636 |
|
|
t.quietlyComplete(); |
5637 |
|
|
break; |
5638 |
|
|
} |
5639 |
|
|
else if ((c = (p = (ReduceEntriesTask<K,V>)par).pending) == 0) { |
5640 |
|
|
if ((s = t.sibling) != null && (u = s.result) != null) |
5641 |
|
|
r = (r == null) ? u : reducer.apply(r, u); |
5642 |
|
|
(t = p).result = r; |
5643 |
|
|
} |
5644 |
|
|
else if (p.casPending(c, 0)) |
5645 |
|
|
break; |
5646 |
|
|
} |
5647 |
|
|
} |
5648 |
|
|
public final Map.Entry<K,V> getRawResult() { return result; } |
5649 |
|
|
} |
5650 |
dl |
1.99 |
|
5651 |
dl |
1.126 |
@SuppressWarnings("serial") |
5652 |
dl |
1.119 |
static final class MapReduceKeysTask<K,V,U> |
5653 |
|
|
extends BulkTask<K,V,U> { |
5654 |
|
|
final Fun<? super K, ? extends U> transformer; |
5655 |
|
|
final BiFun<? super U, ? super U, ? extends U> reducer; |
5656 |
|
|
U result; |
5657 |
|
|
MapReduceKeysTask<K,V,U> sibling; |
5658 |
|
|
MapReduceKeysTask |
5659 |
|
|
(ConcurrentHashMap<K,V> m, |
5660 |
|
|
Fun<? super K, ? extends U> transformer, |
5661 |
|
|
BiFun<? super U, ? super U, ? extends U> reducer) { |
5662 |
|
|
super(m); |
5663 |
|
|
this.transformer = transformer; |
5664 |
|
|
this.reducer = reducer; |
5665 |
|
|
} |
5666 |
|
|
MapReduceKeysTask |
5667 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
5668 |
|
|
Fun<? super K, ? extends U> transformer, |
5669 |
|
|
BiFun<? super U, ? super U, ? extends U> reducer) { |
5670 |
|
|
super(p, b, split); |
5671 |
|
|
this.transformer = transformer; |
5672 |
|
|
this.reducer = reducer; |
5673 |
|
|
} |
5674 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
5675 |
dl |
1.119 |
MapReduceKeysTask<K,V,U> t = this; |
5676 |
|
|
final Fun<? super K, ? extends U> transformer = |
5677 |
|
|
this.transformer; |
5678 |
|
|
final BiFun<? super U, ? super U, ? extends U> reducer = |
5679 |
|
|
this.reducer; |
5680 |
|
|
if (transformer == null || reducer == null) |
5681 |
|
|
throw new Error(NullFunctionMessage); |
5682 |
|
|
int b = batch(); |
5683 |
|
|
while (b > 1 && t.baseIndex != t.baseLimit) { |
5684 |
|
|
b >>>= 1; |
5685 |
|
|
t.pending = 1; |
5686 |
|
|
MapReduceKeysTask<K,V,U> rt = |
5687 |
|
|
new MapReduceKeysTask<K,V,U> |
5688 |
|
|
(t, b, true, transformer, reducer); |
5689 |
|
|
t = new MapReduceKeysTask<K,V,U> |
5690 |
|
|
(t, b, false, transformer, reducer); |
5691 |
|
|
t.sibling = rt; |
5692 |
|
|
rt.sibling = t; |
5693 |
|
|
rt.fork(); |
5694 |
|
|
} |
5695 |
|
|
U r = null, u; |
5696 |
|
|
while (t.advance() != null) { |
5697 |
|
|
if ((u = transformer.apply((K)t.nextKey)) != null) |
5698 |
|
|
r = (r == null) ? u : reducer.apply(r, u); |
5699 |
|
|
} |
5700 |
|
|
t.result = r; |
5701 |
|
|
for (;;) { |
5702 |
|
|
int c; BulkTask<K,V,?> par; MapReduceKeysTask<K,V,U> s, p; |
5703 |
|
|
if ((par = t.parent) == null || |
5704 |
|
|
!(par instanceof MapReduceKeysTask)) { |
5705 |
|
|
t.quietlyComplete(); |
5706 |
|
|
break; |
5707 |
|
|
} |
5708 |
|
|
else if ((c = (p = (MapReduceKeysTask<K,V,U>)par).pending) == 0) { |
5709 |
|
|
if ((s = t.sibling) != null && (u = s.result) != null) |
5710 |
|
|
r = (r == null) ? u : reducer.apply(r, u); |
5711 |
|
|
(t = p).result = r; |
5712 |
|
|
} |
5713 |
|
|
else if (p.casPending(c, 0)) |
5714 |
|
|
break; |
5715 |
|
|
} |
5716 |
tim |
1.1 |
} |
5717 |
dl |
1.119 |
public final U getRawResult() { return result; } |
5718 |
dl |
1.4 |
} |
5719 |
|
|
|
5720 |
dl |
1.126 |
@SuppressWarnings("serial") |
5721 |
dl |
1.119 |
static final class MapReduceValuesTask<K,V,U> |
5722 |
|
|
extends BulkTask<K,V,U> { |
5723 |
|
|
final Fun<? super V, ? extends U> transformer; |
5724 |
|
|
final BiFun<? super U, ? super U, ? extends U> reducer; |
5725 |
|
|
U result; |
5726 |
|
|
MapReduceValuesTask<K,V,U> sibling; |
5727 |
|
|
MapReduceValuesTask |
5728 |
|
|
(ConcurrentHashMap<K,V> m, |
5729 |
|
|
Fun<? super V, ? extends U> transformer, |
5730 |
|
|
BiFun<? super U, ? super U, ? extends U> reducer) { |
5731 |
|
|
super(m); |
5732 |
|
|
this.transformer = transformer; |
5733 |
|
|
this.reducer = reducer; |
5734 |
|
|
} |
5735 |
|
|
MapReduceValuesTask |
5736 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
5737 |
|
|
Fun<? super V, ? extends U> transformer, |
5738 |
|
|
BiFun<? super U, ? super U, ? extends U> reducer) { |
5739 |
|
|
super(p, b, split); |
5740 |
|
|
this.transformer = transformer; |
5741 |
|
|
this.reducer = reducer; |
5742 |
|
|
} |
5743 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
5744 |
dl |
1.119 |
MapReduceValuesTask<K,V,U> t = this; |
5745 |
|
|
final Fun<? super V, ? extends U> transformer = |
5746 |
|
|
this.transformer; |
5747 |
|
|
final BiFun<? super U, ? super U, ? extends U> reducer = |
5748 |
|
|
this.reducer; |
5749 |
|
|
if (transformer == null || reducer == null) |
5750 |
|
|
throw new Error(NullFunctionMessage); |
5751 |
|
|
int b = batch(); |
5752 |
|
|
while (b > 1 && t.baseIndex != t.baseLimit) { |
5753 |
|
|
b >>>= 1; |
5754 |
|
|
t.pending = 1; |
5755 |
|
|
MapReduceValuesTask<K,V,U> rt = |
5756 |
|
|
new MapReduceValuesTask<K,V,U> |
5757 |
|
|
(t, b, true, transformer, reducer); |
5758 |
|
|
t = new MapReduceValuesTask<K,V,U> |
5759 |
|
|
(t, b, false, transformer, reducer); |
5760 |
|
|
t.sibling = rt; |
5761 |
|
|
rt.sibling = t; |
5762 |
|
|
rt.fork(); |
5763 |
|
|
} |
5764 |
|
|
U r = null, u; |
5765 |
|
|
Object v; |
5766 |
|
|
while ((v = t.advance()) != null) { |
5767 |
|
|
if ((u = transformer.apply((V)v)) != null) |
5768 |
|
|
r = (r == null) ? u : reducer.apply(r, u); |
5769 |
|
|
} |
5770 |
|
|
t.result = r; |
5771 |
|
|
for (;;) { |
5772 |
|
|
int c; BulkTask<K,V,?> par; MapReduceValuesTask<K,V,U> s, p; |
5773 |
|
|
if ((par = t.parent) == null || |
5774 |
|
|
!(par instanceof MapReduceValuesTask)) { |
5775 |
|
|
t.quietlyComplete(); |
5776 |
|
|
break; |
5777 |
|
|
} |
5778 |
|
|
else if ((c = (p = (MapReduceValuesTask<K,V,U>)par).pending) == 0) { |
5779 |
|
|
if ((s = t.sibling) != null && (u = s.result) != null) |
5780 |
|
|
r = (r == null) ? u : reducer.apply(r, u); |
5781 |
|
|
(t = p).result = r; |
5782 |
|
|
} |
5783 |
|
|
else if (p.casPending(c, 0)) |
5784 |
|
|
break; |
5785 |
|
|
} |
5786 |
|
|
} |
5787 |
|
|
public final U getRawResult() { return result; } |
5788 |
dl |
1.4 |
} |
5789 |
|
|
|
5790 |
dl |
1.126 |
@SuppressWarnings("serial") |
5791 |
dl |
1.119 |
static final class MapReduceEntriesTask<K,V,U> |
5792 |
|
|
extends BulkTask<K,V,U> { |
5793 |
|
|
final Fun<Map.Entry<K,V>, ? extends U> transformer; |
5794 |
|
|
final BiFun<? super U, ? super U, ? extends U> reducer; |
5795 |
|
|
U result; |
5796 |
|
|
MapReduceEntriesTask<K,V,U> sibling; |
5797 |
|
|
MapReduceEntriesTask |
5798 |
|
|
(ConcurrentHashMap<K,V> m, |
5799 |
|
|
Fun<Map.Entry<K,V>, ? extends U> transformer, |
5800 |
|
|
BiFun<? super U, ? super U, ? extends U> reducer) { |
5801 |
|
|
super(m); |
5802 |
|
|
this.transformer = transformer; |
5803 |
|
|
this.reducer = reducer; |
5804 |
|
|
} |
5805 |
|
|
MapReduceEntriesTask |
5806 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
5807 |
|
|
Fun<Map.Entry<K,V>, ? extends U> transformer, |
5808 |
|
|
BiFun<? super U, ? super U, ? extends U> reducer) { |
5809 |
|
|
super(p, b, split); |
5810 |
|
|
this.transformer = transformer; |
5811 |
|
|
this.reducer = reducer; |
5812 |
|
|
} |
5813 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
5814 |
dl |
1.119 |
MapReduceEntriesTask<K,V,U> t = this; |
5815 |
|
|
final Fun<Map.Entry<K,V>, ? extends U> transformer = |
5816 |
|
|
this.transformer; |
5817 |
|
|
final BiFun<? super U, ? super U, ? extends U> reducer = |
5818 |
|
|
this.reducer; |
5819 |
|
|
if (transformer == null || reducer == null) |
5820 |
|
|
throw new Error(NullFunctionMessage); |
5821 |
|
|
int b = batch(); |
5822 |
|
|
while (b > 1 && t.baseIndex != t.baseLimit) { |
5823 |
|
|
b >>>= 1; |
5824 |
|
|
t.pending = 1; |
5825 |
|
|
MapReduceEntriesTask<K,V,U> rt = |
5826 |
|
|
new MapReduceEntriesTask<K,V,U> |
5827 |
|
|
(t, b, true, transformer, reducer); |
5828 |
|
|
t = new MapReduceEntriesTask<K,V,U> |
5829 |
|
|
(t, b, false, transformer, reducer); |
5830 |
|
|
t.sibling = rt; |
5831 |
|
|
rt.sibling = t; |
5832 |
|
|
rt.fork(); |
5833 |
|
|
} |
5834 |
|
|
U r = null, u; |
5835 |
|
|
Object v; |
5836 |
|
|
while ((v = t.advance()) != null) { |
5837 |
|
|
if ((u = transformer.apply(entryFor((K)t.nextKey, (V)v))) != null) |
5838 |
|
|
r = (r == null) ? u : reducer.apply(r, u); |
5839 |
|
|
} |
5840 |
|
|
t.result = r; |
5841 |
|
|
for (;;) { |
5842 |
|
|
int c; BulkTask<K,V,?> par; MapReduceEntriesTask<K,V,U> s, p; |
5843 |
|
|
if ((par = t.parent) == null || |
5844 |
|
|
!(par instanceof MapReduceEntriesTask)) { |
5845 |
|
|
t.quietlyComplete(); |
5846 |
|
|
break; |
5847 |
|
|
} |
5848 |
|
|
else if ((c = (p = (MapReduceEntriesTask<K,V,U>)par).pending) == 0) { |
5849 |
|
|
if ((s = t.sibling) != null && (u = s.result) != null) |
5850 |
|
|
r = (r == null) ? u : reducer.apply(r, u); |
5851 |
|
|
(t = p).result = r; |
5852 |
|
|
} |
5853 |
|
|
else if (p.casPending(c, 0)) |
5854 |
|
|
break; |
5855 |
|
|
} |
5856 |
|
|
} |
5857 |
|
|
public final U getRawResult() { return result; } |
5858 |
dl |
1.4 |
} |
5859 |
tim |
1.1 |
|
5860 |
dl |
1.126 |
@SuppressWarnings("serial") |
5861 |
dl |
1.119 |
static final class MapReduceMappingsTask<K,V,U> |
5862 |
|
|
extends BulkTask<K,V,U> { |
5863 |
|
|
final BiFun<? super K, ? super V, ? extends U> transformer; |
5864 |
|
|
final BiFun<? super U, ? super U, ? extends U> reducer; |
5865 |
|
|
U result; |
5866 |
|
|
MapReduceMappingsTask<K,V,U> sibling; |
5867 |
|
|
MapReduceMappingsTask |
5868 |
|
|
(ConcurrentHashMap<K,V> m, |
5869 |
|
|
BiFun<? super K, ? super V, ? extends U> transformer, |
5870 |
|
|
BiFun<? super U, ? super U, ? extends U> reducer) { |
5871 |
|
|
super(m); |
5872 |
|
|
this.transformer = transformer; |
5873 |
|
|
this.reducer = reducer; |
5874 |
|
|
} |
5875 |
|
|
MapReduceMappingsTask |
5876 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
5877 |
|
|
BiFun<? super K, ? super V, ? extends U> transformer, |
5878 |
|
|
BiFun<? super U, ? super U, ? extends U> reducer) { |
5879 |
|
|
super(p, b, split); |
5880 |
|
|
this.transformer = transformer; |
5881 |
|
|
this.reducer = reducer; |
5882 |
|
|
} |
5883 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
5884 |
dl |
1.119 |
MapReduceMappingsTask<K,V,U> t = this; |
5885 |
|
|
final BiFun<? super K, ? super V, ? extends U> transformer = |
5886 |
|
|
this.transformer; |
5887 |
|
|
final BiFun<? super U, ? super U, ? extends U> reducer = |
5888 |
|
|
this.reducer; |
5889 |
|
|
if (transformer == null || reducer == null) |
5890 |
|
|
throw new Error(NullFunctionMessage); |
5891 |
|
|
int b = batch(); |
5892 |
|
|
while (b > 1 && t.baseIndex != t.baseLimit) { |
5893 |
|
|
b >>>= 1; |
5894 |
|
|
t.pending = 1; |
5895 |
|
|
MapReduceMappingsTask<K,V,U> rt = |
5896 |
|
|
new MapReduceMappingsTask<K,V,U> |
5897 |
|
|
(t, b, true, transformer, reducer); |
5898 |
|
|
t = new MapReduceMappingsTask<K,V,U> |
5899 |
|
|
(t, b, false, transformer, reducer); |
5900 |
|
|
t.sibling = rt; |
5901 |
|
|
rt.sibling = t; |
5902 |
|
|
rt.fork(); |
5903 |
|
|
} |
5904 |
|
|
U r = null, u; |
5905 |
|
|
Object v; |
5906 |
|
|
while ((v = t.advance()) != null) { |
5907 |
|
|
if ((u = transformer.apply((K)t.nextKey, (V)v)) != null) |
5908 |
|
|
r = (r == null) ? u : reducer.apply(r, u); |
5909 |
|
|
} |
5910 |
|
|
for (;;) { |
5911 |
|
|
int c; BulkTask<K,V,?> par; MapReduceMappingsTask<K,V,U> s, p; |
5912 |
|
|
if ((par = t.parent) == null || |
5913 |
|
|
!(par instanceof MapReduceMappingsTask)) { |
5914 |
|
|
t.quietlyComplete(); |
5915 |
|
|
break; |
5916 |
|
|
} |
5917 |
|
|
else if ((c = (p = (MapReduceMappingsTask<K,V,U>)par).pending) == 0) { |
5918 |
|
|
if ((s = t.sibling) != null && (u = s.result) != null) |
5919 |
|
|
r = (r == null) ? u : reducer.apply(r, u); |
5920 |
|
|
(t = p).result = r; |
5921 |
|
|
} |
5922 |
|
|
else if (p.casPending(c, 0)) |
5923 |
|
|
break; |
5924 |
|
|
} |
5925 |
|
|
} |
5926 |
|
|
public final U getRawResult() { return result; } |
5927 |
|
|
} |
5928 |
jsr166 |
1.114 |
|
5929 |
dl |
1.126 |
@SuppressWarnings("serial") |
5930 |
dl |
1.119 |
static final class MapReduceKeysToDoubleTask<K,V> |
5931 |
|
|
extends BulkTask<K,V,Double> { |
5932 |
|
|
final ObjectToDouble<? super K> transformer; |
5933 |
|
|
final DoubleByDoubleToDouble reducer; |
5934 |
|
|
final double basis; |
5935 |
|
|
double result; |
5936 |
|
|
MapReduceKeysToDoubleTask<K,V> sibling; |
5937 |
|
|
MapReduceKeysToDoubleTask |
5938 |
|
|
(ConcurrentHashMap<K,V> m, |
5939 |
|
|
ObjectToDouble<? super K> transformer, |
5940 |
|
|
double basis, |
5941 |
|
|
DoubleByDoubleToDouble reducer) { |
5942 |
|
|
super(m); |
5943 |
|
|
this.transformer = transformer; |
5944 |
|
|
this.basis = basis; this.reducer = reducer; |
5945 |
|
|
} |
5946 |
|
|
MapReduceKeysToDoubleTask |
5947 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
5948 |
|
|
ObjectToDouble<? super K> transformer, |
5949 |
|
|
double basis, |
5950 |
|
|
DoubleByDoubleToDouble reducer) { |
5951 |
|
|
super(p, b, split); |
5952 |
|
|
this.transformer = transformer; |
5953 |
|
|
this.basis = basis; this.reducer = reducer; |
5954 |
|
|
} |
5955 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
5956 |
dl |
1.119 |
MapReduceKeysToDoubleTask<K,V> t = this; |
5957 |
|
|
final ObjectToDouble<? super K> transformer = |
5958 |
|
|
this.transformer; |
5959 |
|
|
final DoubleByDoubleToDouble reducer = this.reducer; |
5960 |
|
|
if (transformer == null || reducer == null) |
5961 |
|
|
throw new Error(NullFunctionMessage); |
5962 |
|
|
final double id = this.basis; |
5963 |
|
|
int b = batch(); |
5964 |
|
|
while (b > 1 && t.baseIndex != t.baseLimit) { |
5965 |
|
|
b >>>= 1; |
5966 |
|
|
t.pending = 1; |
5967 |
|
|
MapReduceKeysToDoubleTask<K,V> rt = |
5968 |
|
|
new MapReduceKeysToDoubleTask<K,V> |
5969 |
|
|
(t, b, true, transformer, id, reducer); |
5970 |
|
|
t = new MapReduceKeysToDoubleTask<K,V> |
5971 |
|
|
(t, b, false, transformer, id, reducer); |
5972 |
|
|
t.sibling = rt; |
5973 |
|
|
rt.sibling = t; |
5974 |
|
|
rt.fork(); |
5975 |
|
|
} |
5976 |
|
|
double r = id; |
5977 |
|
|
while (t.advance() != null) |
5978 |
|
|
r = reducer.apply(r, transformer.apply((K)t.nextKey)); |
5979 |
|
|
t.result = r; |
5980 |
|
|
for (;;) { |
5981 |
|
|
int c; BulkTask<K,V,?> par; MapReduceKeysToDoubleTask<K,V> s, p; |
5982 |
|
|
if ((par = t.parent) == null || |
5983 |
|
|
!(par instanceof MapReduceKeysToDoubleTask)) { |
5984 |
|
|
t.quietlyComplete(); |
5985 |
|
|
break; |
5986 |
|
|
} |
5987 |
|
|
else if ((c = (p = (MapReduceKeysToDoubleTask<K,V>)par).pending) == 0) { |
5988 |
|
|
if ((s = t.sibling) != null) |
5989 |
|
|
r = reducer.apply(r, s.result); |
5990 |
|
|
(t = p).result = r; |
5991 |
|
|
} |
5992 |
|
|
else if (p.casPending(c, 0)) |
5993 |
|
|
break; |
5994 |
|
|
} |
5995 |
dl |
1.79 |
} |
5996 |
dl |
1.119 |
public final Double getRawResult() { return result; } |
5997 |
|
|
} |
5998 |
dl |
1.79 |
|
5999 |
dl |
1.126 |
@SuppressWarnings("serial") |
6000 |
dl |
1.119 |
static final class MapReduceValuesToDoubleTask<K,V> |
6001 |
|
|
extends BulkTask<K,V,Double> { |
6002 |
|
|
final ObjectToDouble<? super V> transformer; |
6003 |
|
|
final DoubleByDoubleToDouble reducer; |
6004 |
|
|
final double basis; |
6005 |
|
|
double result; |
6006 |
|
|
MapReduceValuesToDoubleTask<K,V> sibling; |
6007 |
|
|
MapReduceValuesToDoubleTask |
6008 |
|
|
(ConcurrentHashMap<K,V> m, |
6009 |
|
|
ObjectToDouble<? super V> transformer, |
6010 |
|
|
double basis, |
6011 |
|
|
DoubleByDoubleToDouble reducer) { |
6012 |
|
|
super(m); |
6013 |
|
|
this.transformer = transformer; |
6014 |
|
|
this.basis = basis; this.reducer = reducer; |
6015 |
|
|
} |
6016 |
|
|
MapReduceValuesToDoubleTask |
6017 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
6018 |
|
|
ObjectToDouble<? super V> transformer, |
6019 |
|
|
double basis, |
6020 |
|
|
DoubleByDoubleToDouble reducer) { |
6021 |
|
|
super(p, b, split); |
6022 |
|
|
this.transformer = transformer; |
6023 |
|
|
this.basis = basis; this.reducer = reducer; |
6024 |
|
|
} |
6025 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
6026 |
dl |
1.119 |
MapReduceValuesToDoubleTask<K,V> t = this; |
6027 |
|
|
final ObjectToDouble<? super V> transformer = |
6028 |
|
|
this.transformer; |
6029 |
|
|
final DoubleByDoubleToDouble reducer = this.reducer; |
6030 |
|
|
if (transformer == null || reducer == null) |
6031 |
|
|
throw new Error(NullFunctionMessage); |
6032 |
|
|
final double id = this.basis; |
6033 |
|
|
int b = batch(); |
6034 |
|
|
while (b > 1 && t.baseIndex != t.baseLimit) { |
6035 |
|
|
b >>>= 1; |
6036 |
|
|
t.pending = 1; |
6037 |
|
|
MapReduceValuesToDoubleTask<K,V> rt = |
6038 |
|
|
new MapReduceValuesToDoubleTask<K,V> |
6039 |
|
|
(t, b, true, transformer, id, reducer); |
6040 |
|
|
t = new MapReduceValuesToDoubleTask<K,V> |
6041 |
|
|
(t, b, false, transformer, id, reducer); |
6042 |
|
|
t.sibling = rt; |
6043 |
|
|
rt.sibling = t; |
6044 |
|
|
rt.fork(); |
6045 |
|
|
} |
6046 |
|
|
double r = id; |
6047 |
|
|
Object v; |
6048 |
|
|
while ((v = t.advance()) != null) |
6049 |
|
|
r = reducer.apply(r, transformer.apply((V)v)); |
6050 |
|
|
t.result = r; |
6051 |
|
|
for (;;) { |
6052 |
|
|
int c; BulkTask<K,V,?> par; MapReduceValuesToDoubleTask<K,V> s, p; |
6053 |
|
|
if ((par = t.parent) == null || |
6054 |
|
|
!(par instanceof MapReduceValuesToDoubleTask)) { |
6055 |
|
|
t.quietlyComplete(); |
6056 |
|
|
break; |
6057 |
|
|
} |
6058 |
|
|
else if ((c = (p = (MapReduceValuesToDoubleTask<K,V>)par).pending) == 0) { |
6059 |
|
|
if ((s = t.sibling) != null) |
6060 |
|
|
r = reducer.apply(r, s.result); |
6061 |
|
|
(t = p).result = r; |
6062 |
|
|
} |
6063 |
|
|
else if (p.casPending(c, 0)) |
6064 |
|
|
break; |
6065 |
|
|
} |
6066 |
dl |
1.30 |
} |
6067 |
dl |
1.119 |
public final Double getRawResult() { return result; } |
6068 |
dl |
1.79 |
} |
6069 |
dl |
1.30 |
|
6070 |
dl |
1.126 |
@SuppressWarnings("serial") |
6071 |
dl |
1.119 |
static final class MapReduceEntriesToDoubleTask<K,V> |
6072 |
|
|
extends BulkTask<K,V,Double> { |
6073 |
|
|
final ObjectToDouble<Map.Entry<K,V>> transformer; |
6074 |
|
|
final DoubleByDoubleToDouble reducer; |
6075 |
|
|
final double basis; |
6076 |
|
|
double result; |
6077 |
|
|
MapReduceEntriesToDoubleTask<K,V> sibling; |
6078 |
|
|
MapReduceEntriesToDoubleTask |
6079 |
|
|
(ConcurrentHashMap<K,V> m, |
6080 |
|
|
ObjectToDouble<Map.Entry<K,V>> transformer, |
6081 |
|
|
double basis, |
6082 |
|
|
DoubleByDoubleToDouble reducer) { |
6083 |
|
|
super(m); |
6084 |
|
|
this.transformer = transformer; |
6085 |
|
|
this.basis = basis; this.reducer = reducer; |
6086 |
|
|
} |
6087 |
|
|
MapReduceEntriesToDoubleTask |
6088 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
6089 |
|
|
ObjectToDouble<Map.Entry<K,V>> transformer, |
6090 |
|
|
double basis, |
6091 |
|
|
DoubleByDoubleToDouble reducer) { |
6092 |
|
|
super(p, b, split); |
6093 |
|
|
this.transformer = transformer; |
6094 |
|
|
this.basis = basis; this.reducer = reducer; |
6095 |
|
|
} |
6096 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
6097 |
dl |
1.119 |
MapReduceEntriesToDoubleTask<K,V> t = this; |
6098 |
|
|
final ObjectToDouble<Map.Entry<K,V>> transformer = |
6099 |
|
|
this.transformer; |
6100 |
|
|
final DoubleByDoubleToDouble reducer = this.reducer; |
6101 |
|
|
if (transformer == null || reducer == null) |
6102 |
|
|
throw new Error(NullFunctionMessage); |
6103 |
|
|
final double id = this.basis; |
6104 |
|
|
int b = batch(); |
6105 |
|
|
while (b > 1 && t.baseIndex != t.baseLimit) { |
6106 |
|
|
b >>>= 1; |
6107 |
|
|
t.pending = 1; |
6108 |
|
|
MapReduceEntriesToDoubleTask<K,V> rt = |
6109 |
|
|
new MapReduceEntriesToDoubleTask<K,V> |
6110 |
|
|
(t, b, true, transformer, id, reducer); |
6111 |
|
|
t = new MapReduceEntriesToDoubleTask<K,V> |
6112 |
|
|
(t, b, false, transformer, id, reducer); |
6113 |
|
|
t.sibling = rt; |
6114 |
|
|
rt.sibling = t; |
6115 |
|
|
rt.fork(); |
6116 |
|
|
} |
6117 |
|
|
double r = id; |
6118 |
|
|
Object v; |
6119 |
|
|
while ((v = t.advance()) != null) |
6120 |
|
|
r = reducer.apply(r, transformer.apply(entryFor((K)t.nextKey, (V)v))); |
6121 |
|
|
t.result = r; |
6122 |
|
|
for (;;) { |
6123 |
|
|
int c; BulkTask<K,V,?> par; MapReduceEntriesToDoubleTask<K,V> s, p; |
6124 |
|
|
if ((par = t.parent) == null || |
6125 |
|
|
!(par instanceof MapReduceEntriesToDoubleTask)) { |
6126 |
|
|
t.quietlyComplete(); |
6127 |
|
|
break; |
6128 |
|
|
} |
6129 |
|
|
else if ((c = (p = (MapReduceEntriesToDoubleTask<K,V>)par).pending) == 0) { |
6130 |
|
|
if ((s = t.sibling) != null) |
6131 |
|
|
r = reducer.apply(r, s.result); |
6132 |
|
|
(t = p).result = r; |
6133 |
|
|
} |
6134 |
|
|
else if (p.casPending(c, 0)) |
6135 |
|
|
break; |
6136 |
|
|
} |
6137 |
dl |
1.30 |
} |
6138 |
dl |
1.119 |
public final Double getRawResult() { return result; } |
6139 |
tim |
1.1 |
} |
6140 |
|
|
|
6141 |
dl |
1.126 |
@SuppressWarnings("serial") |
6142 |
dl |
1.119 |
static final class MapReduceMappingsToDoubleTask<K,V> |
6143 |
|
|
extends BulkTask<K,V,Double> { |
6144 |
|
|
final ObjectByObjectToDouble<? super K, ? super V> transformer; |
6145 |
|
|
final DoubleByDoubleToDouble reducer; |
6146 |
|
|
final double basis; |
6147 |
|
|
double result; |
6148 |
|
|
MapReduceMappingsToDoubleTask<K,V> sibling; |
6149 |
|
|
MapReduceMappingsToDoubleTask |
6150 |
|
|
(ConcurrentHashMap<K,V> m, |
6151 |
|
|
ObjectByObjectToDouble<? super K, ? super V> transformer, |
6152 |
|
|
double basis, |
6153 |
|
|
DoubleByDoubleToDouble reducer) { |
6154 |
|
|
super(m); |
6155 |
|
|
this.transformer = transformer; |
6156 |
|
|
this.basis = basis; this.reducer = reducer; |
6157 |
|
|
} |
6158 |
|
|
MapReduceMappingsToDoubleTask |
6159 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
6160 |
|
|
ObjectByObjectToDouble<? super K, ? super V> transformer, |
6161 |
|
|
double basis, |
6162 |
|
|
DoubleByDoubleToDouble reducer) { |
6163 |
|
|
super(p, b, split); |
6164 |
|
|
this.transformer = transformer; |
6165 |
|
|
this.basis = basis; this.reducer = reducer; |
6166 |
|
|
} |
6167 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
6168 |
dl |
1.119 |
MapReduceMappingsToDoubleTask<K,V> t = this; |
6169 |
|
|
final ObjectByObjectToDouble<? super K, ? super V> transformer = |
6170 |
|
|
this.transformer; |
6171 |
|
|
final DoubleByDoubleToDouble reducer = this.reducer; |
6172 |
|
|
if (transformer == null || reducer == null) |
6173 |
|
|
throw new Error(NullFunctionMessage); |
6174 |
|
|
final double id = this.basis; |
6175 |
|
|
int b = batch(); |
6176 |
|
|
while (b > 1 && t.baseIndex != t.baseLimit) { |
6177 |
|
|
b >>>= 1; |
6178 |
|
|
t.pending = 1; |
6179 |
|
|
MapReduceMappingsToDoubleTask<K,V> rt = |
6180 |
|
|
new MapReduceMappingsToDoubleTask<K,V> |
6181 |
|
|
(t, b, true, transformer, id, reducer); |
6182 |
|
|
t = new MapReduceMappingsToDoubleTask<K,V> |
6183 |
|
|
(t, b, false, transformer, id, reducer); |
6184 |
|
|
t.sibling = rt; |
6185 |
|
|
rt.sibling = t; |
6186 |
|
|
rt.fork(); |
6187 |
|
|
} |
6188 |
|
|
double r = id; |
6189 |
|
|
Object v; |
6190 |
|
|
while ((v = t.advance()) != null) |
6191 |
|
|
r = reducer.apply(r, transformer.apply((K)t.nextKey, (V)v)); |
6192 |
|
|
t.result = r; |
6193 |
|
|
for (;;) { |
6194 |
|
|
int c; BulkTask<K,V,?> par; MapReduceMappingsToDoubleTask<K,V> s, p; |
6195 |
|
|
if ((par = t.parent) == null || |
6196 |
|
|
!(par instanceof MapReduceMappingsToDoubleTask)) { |
6197 |
|
|
t.quietlyComplete(); |
6198 |
|
|
break; |
6199 |
|
|
} |
6200 |
|
|
else if ((c = (p = (MapReduceMappingsToDoubleTask<K,V>)par).pending) == 0) { |
6201 |
|
|
if ((s = t.sibling) != null) |
6202 |
|
|
r = reducer.apply(r, s.result); |
6203 |
|
|
(t = p).result = r; |
6204 |
|
|
} |
6205 |
|
|
else if (p.casPending(c, 0)) |
6206 |
|
|
break; |
6207 |
|
|
} |
6208 |
dl |
1.4 |
} |
6209 |
dl |
1.119 |
public final Double getRawResult() { return result; } |
6210 |
|
|
} |
6211 |
|
|
|
6212 |
dl |
1.126 |
@SuppressWarnings("serial") |
6213 |
dl |
1.119 |
static final class MapReduceKeysToLongTask<K,V> |
6214 |
|
|
extends BulkTask<K,V,Long> { |
6215 |
|
|
final ObjectToLong<? super K> transformer; |
6216 |
|
|
final LongByLongToLong reducer; |
6217 |
|
|
final long basis; |
6218 |
|
|
long result; |
6219 |
|
|
MapReduceKeysToLongTask<K,V> sibling; |
6220 |
|
|
MapReduceKeysToLongTask |
6221 |
|
|
(ConcurrentHashMap<K,V> m, |
6222 |
|
|
ObjectToLong<? super K> transformer, |
6223 |
|
|
long basis, |
6224 |
|
|
LongByLongToLong reducer) { |
6225 |
|
|
super(m); |
6226 |
|
|
this.transformer = transformer; |
6227 |
|
|
this.basis = basis; this.reducer = reducer; |
6228 |
|
|
} |
6229 |
|
|
MapReduceKeysToLongTask |
6230 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
6231 |
|
|
ObjectToLong<? super K> transformer, |
6232 |
|
|
long basis, |
6233 |
|
|
LongByLongToLong reducer) { |
6234 |
|
|
super(p, b, split); |
6235 |
|
|
this.transformer = transformer; |
6236 |
|
|
this.basis = basis; this.reducer = reducer; |
6237 |
|
|
} |
6238 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
6239 |
dl |
1.119 |
MapReduceKeysToLongTask<K,V> t = this; |
6240 |
|
|
final ObjectToLong<? super K> transformer = |
6241 |
|
|
this.transformer; |
6242 |
|
|
final LongByLongToLong reducer = this.reducer; |
6243 |
|
|
if (transformer == null || reducer == null) |
6244 |
|
|
throw new Error(NullFunctionMessage); |
6245 |
|
|
final long id = this.basis; |
6246 |
|
|
int b = batch(); |
6247 |
|
|
while (b > 1 && t.baseIndex != t.baseLimit) { |
6248 |
|
|
b >>>= 1; |
6249 |
|
|
t.pending = 1; |
6250 |
|
|
MapReduceKeysToLongTask<K,V> rt = |
6251 |
|
|
new MapReduceKeysToLongTask<K,V> |
6252 |
|
|
(t, b, true, transformer, id, reducer); |
6253 |
|
|
t = new MapReduceKeysToLongTask<K,V> |
6254 |
|
|
(t, b, false, transformer, id, reducer); |
6255 |
|
|
t.sibling = rt; |
6256 |
|
|
rt.sibling = t; |
6257 |
|
|
rt.fork(); |
6258 |
|
|
} |
6259 |
|
|
long r = id; |
6260 |
|
|
while (t.advance() != null) |
6261 |
|
|
r = reducer.apply(r, transformer.apply((K)t.nextKey)); |
6262 |
|
|
t.result = r; |
6263 |
|
|
for (;;) { |
6264 |
|
|
int c; BulkTask<K,V,?> par; MapReduceKeysToLongTask<K,V> s, p; |
6265 |
|
|
if ((par = t.parent) == null || |
6266 |
|
|
!(par instanceof MapReduceKeysToLongTask)) { |
6267 |
|
|
t.quietlyComplete(); |
6268 |
|
|
break; |
6269 |
|
|
} |
6270 |
|
|
else if ((c = (p = (MapReduceKeysToLongTask<K,V>)par).pending) == 0) { |
6271 |
|
|
if ((s = t.sibling) != null) |
6272 |
|
|
r = reducer.apply(r, s.result); |
6273 |
|
|
(t = p).result = r; |
6274 |
|
|
} |
6275 |
|
|
else if (p.casPending(c, 0)) |
6276 |
|
|
break; |
6277 |
|
|
} |
6278 |
dl |
1.4 |
} |
6279 |
dl |
1.119 |
public final Long getRawResult() { return result; } |
6280 |
|
|
} |
6281 |
|
|
|
6282 |
dl |
1.126 |
@SuppressWarnings("serial") |
6283 |
dl |
1.119 |
static final class MapReduceValuesToLongTask<K,V> |
6284 |
|
|
extends BulkTask<K,V,Long> { |
6285 |
|
|
final ObjectToLong<? super V> transformer; |
6286 |
|
|
final LongByLongToLong reducer; |
6287 |
|
|
final long basis; |
6288 |
|
|
long result; |
6289 |
|
|
MapReduceValuesToLongTask<K,V> sibling; |
6290 |
|
|
MapReduceValuesToLongTask |
6291 |
|
|
(ConcurrentHashMap<K,V> m, |
6292 |
|
|
ObjectToLong<? super V> transformer, |
6293 |
|
|
long basis, |
6294 |
|
|
LongByLongToLong reducer) { |
6295 |
|
|
super(m); |
6296 |
|
|
this.transformer = transformer; |
6297 |
|
|
this.basis = basis; this.reducer = reducer; |
6298 |
|
|
} |
6299 |
|
|
MapReduceValuesToLongTask |
6300 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
6301 |
|
|
ObjectToLong<? super V> transformer, |
6302 |
|
|
long basis, |
6303 |
|
|
LongByLongToLong reducer) { |
6304 |
|
|
super(p, b, split); |
6305 |
|
|
this.transformer = transformer; |
6306 |
|
|
this.basis = basis; this.reducer = reducer; |
6307 |
|
|
} |
6308 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
6309 |
dl |
1.119 |
MapReduceValuesToLongTask<K,V> t = this; |
6310 |
|
|
final ObjectToLong<? super V> transformer = |
6311 |
|
|
this.transformer; |
6312 |
|
|
final LongByLongToLong reducer = this.reducer; |
6313 |
|
|
if (transformer == null || reducer == null) |
6314 |
|
|
throw new Error(NullFunctionMessage); |
6315 |
|
|
final long id = this.basis; |
6316 |
|
|
int b = batch(); |
6317 |
|
|
while (b > 1 && t.baseIndex != t.baseLimit) { |
6318 |
|
|
b >>>= 1; |
6319 |
|
|
t.pending = 1; |
6320 |
|
|
MapReduceValuesToLongTask<K,V> rt = |
6321 |
|
|
new MapReduceValuesToLongTask<K,V> |
6322 |
|
|
(t, b, true, transformer, id, reducer); |
6323 |
|
|
t = new MapReduceValuesToLongTask<K,V> |
6324 |
|
|
(t, b, false, transformer, id, reducer); |
6325 |
|
|
t.sibling = rt; |
6326 |
|
|
rt.sibling = t; |
6327 |
|
|
rt.fork(); |
6328 |
|
|
} |
6329 |
|
|
long r = id; |
6330 |
|
|
Object v; |
6331 |
|
|
while ((v = t.advance()) != null) |
6332 |
|
|
r = reducer.apply(r, transformer.apply((V)v)); |
6333 |
|
|
t.result = r; |
6334 |
|
|
for (;;) { |
6335 |
|
|
int c; BulkTask<K,V,?> par; MapReduceValuesToLongTask<K,V> s, p; |
6336 |
|
|
if ((par = t.parent) == null || |
6337 |
|
|
!(par instanceof MapReduceValuesToLongTask)) { |
6338 |
|
|
t.quietlyComplete(); |
6339 |
|
|
break; |
6340 |
|
|
} |
6341 |
|
|
else if ((c = (p = (MapReduceValuesToLongTask<K,V>)par).pending) == 0) { |
6342 |
|
|
if ((s = t.sibling) != null) |
6343 |
|
|
r = reducer.apply(r, s.result); |
6344 |
|
|
(t = p).result = r; |
6345 |
|
|
} |
6346 |
|
|
else if (p.casPending(c, 0)) |
6347 |
|
|
break; |
6348 |
|
|
} |
6349 |
jsr166 |
1.95 |
} |
6350 |
dl |
1.119 |
public final Long getRawResult() { return result; } |
6351 |
|
|
} |
6352 |
|
|
|
6353 |
dl |
1.126 |
@SuppressWarnings("serial") |
6354 |
dl |
1.119 |
static final class MapReduceEntriesToLongTask<K,V> |
6355 |
|
|
extends BulkTask<K,V,Long> { |
6356 |
|
|
final ObjectToLong<Map.Entry<K,V>> transformer; |
6357 |
|
|
final LongByLongToLong reducer; |
6358 |
|
|
final long basis; |
6359 |
|
|
long result; |
6360 |
|
|
MapReduceEntriesToLongTask<K,V> sibling; |
6361 |
|
|
MapReduceEntriesToLongTask |
6362 |
|
|
(ConcurrentHashMap<K,V> m, |
6363 |
|
|
ObjectToLong<Map.Entry<K,V>> transformer, |
6364 |
|
|
long basis, |
6365 |
|
|
LongByLongToLong reducer) { |
6366 |
|
|
super(m); |
6367 |
|
|
this.transformer = transformer; |
6368 |
|
|
this.basis = basis; this.reducer = reducer; |
6369 |
|
|
} |
6370 |
|
|
MapReduceEntriesToLongTask |
6371 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
6372 |
|
|
ObjectToLong<Map.Entry<K,V>> transformer, |
6373 |
|
|
long basis, |
6374 |
|
|
LongByLongToLong reducer) { |
6375 |
|
|
super(p, b, split); |
6376 |
|
|
this.transformer = transformer; |
6377 |
|
|
this.basis = basis; this.reducer = reducer; |
6378 |
|
|
} |
6379 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
6380 |
dl |
1.119 |
MapReduceEntriesToLongTask<K,V> t = this; |
6381 |
|
|
final ObjectToLong<Map.Entry<K,V>> transformer = |
6382 |
|
|
this.transformer; |
6383 |
|
|
final LongByLongToLong reducer = this.reducer; |
6384 |
|
|
if (transformer == null || reducer == null) |
6385 |
|
|
throw new Error(NullFunctionMessage); |
6386 |
|
|
final long id = this.basis; |
6387 |
|
|
int b = batch(); |
6388 |
|
|
while (b > 1 && t.baseIndex != t.baseLimit) { |
6389 |
|
|
b >>>= 1; |
6390 |
|
|
t.pending = 1; |
6391 |
|
|
MapReduceEntriesToLongTask<K,V> rt = |
6392 |
|
|
new MapReduceEntriesToLongTask<K,V> |
6393 |
|
|
(t, b, true, transformer, id, reducer); |
6394 |
|
|
t = new MapReduceEntriesToLongTask<K,V> |
6395 |
|
|
(t, b, false, transformer, id, reducer); |
6396 |
|
|
t.sibling = rt; |
6397 |
|
|
rt.sibling = t; |
6398 |
|
|
rt.fork(); |
6399 |
|
|
} |
6400 |
|
|
long r = id; |
6401 |
|
|
Object v; |
6402 |
|
|
while ((v = t.advance()) != null) |
6403 |
|
|
r = reducer.apply(r, transformer.apply(entryFor((K)t.nextKey, (V)v))); |
6404 |
|
|
t.result = r; |
6405 |
|
|
for (;;) { |
6406 |
|
|
int c; BulkTask<K,V,?> par; MapReduceEntriesToLongTask<K,V> s, p; |
6407 |
|
|
if ((par = t.parent) == null || |
6408 |
|
|
!(par instanceof MapReduceEntriesToLongTask)) { |
6409 |
|
|
t.quietlyComplete(); |
6410 |
|
|
break; |
6411 |
|
|
} |
6412 |
|
|
else if ((c = (p = (MapReduceEntriesToLongTask<K,V>)par).pending) == 0) { |
6413 |
|
|
if ((s = t.sibling) != null) |
6414 |
|
|
r = reducer.apply(r, s.result); |
6415 |
|
|
(t = p).result = r; |
6416 |
|
|
} |
6417 |
|
|
else if (p.casPending(c, 0)) |
6418 |
|
|
break; |
6419 |
|
|
} |
6420 |
dl |
1.4 |
} |
6421 |
dl |
1.119 |
public final Long getRawResult() { return result; } |
6422 |
tim |
1.1 |
} |
6423 |
|
|
|
6424 |
dl |
1.126 |
@SuppressWarnings("serial") |
6425 |
dl |
1.119 |
static final class MapReduceMappingsToLongTask<K,V> |
6426 |
|
|
extends BulkTask<K,V,Long> { |
6427 |
|
|
final ObjectByObjectToLong<? super K, ? super V> transformer; |
6428 |
|
|
final LongByLongToLong reducer; |
6429 |
|
|
final long basis; |
6430 |
|
|
long result; |
6431 |
|
|
MapReduceMappingsToLongTask<K,V> sibling; |
6432 |
|
|
MapReduceMappingsToLongTask |
6433 |
|
|
(ConcurrentHashMap<K,V> m, |
6434 |
|
|
ObjectByObjectToLong<? super K, ? super V> transformer, |
6435 |
|
|
long basis, |
6436 |
|
|
LongByLongToLong reducer) { |
6437 |
|
|
super(m); |
6438 |
|
|
this.transformer = transformer; |
6439 |
|
|
this.basis = basis; this.reducer = reducer; |
6440 |
|
|
} |
6441 |
|
|
MapReduceMappingsToLongTask |
6442 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
6443 |
|
|
ObjectByObjectToLong<? super K, ? super V> transformer, |
6444 |
|
|
long basis, |
6445 |
|
|
LongByLongToLong reducer) { |
6446 |
|
|
super(p, b, split); |
6447 |
|
|
this.transformer = transformer; |
6448 |
|
|
this.basis = basis; this.reducer = reducer; |
6449 |
|
|
} |
6450 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
6451 |
dl |
1.119 |
MapReduceMappingsToLongTask<K,V> t = this; |
6452 |
|
|
final ObjectByObjectToLong<? super K, ? super V> transformer = |
6453 |
|
|
this.transformer; |
6454 |
|
|
final LongByLongToLong reducer = this.reducer; |
6455 |
|
|
if (transformer == null || reducer == null) |
6456 |
|
|
throw new Error(NullFunctionMessage); |
6457 |
|
|
final long id = this.basis; |
6458 |
|
|
int b = batch(); |
6459 |
|
|
while (b > 1 && t.baseIndex != t.baseLimit) { |
6460 |
|
|
b >>>= 1; |
6461 |
|
|
t.pending = 1; |
6462 |
|
|
MapReduceMappingsToLongTask<K,V> rt = |
6463 |
|
|
new MapReduceMappingsToLongTask<K,V> |
6464 |
|
|
(t, b, true, transformer, id, reducer); |
6465 |
|
|
t = new MapReduceMappingsToLongTask<K,V> |
6466 |
|
|
(t, b, false, transformer, id, reducer); |
6467 |
|
|
t.sibling = rt; |
6468 |
|
|
rt.sibling = t; |
6469 |
|
|
rt.fork(); |
6470 |
|
|
} |
6471 |
|
|
long r = id; |
6472 |
|
|
Object v; |
6473 |
|
|
while ((v = t.advance()) != null) |
6474 |
|
|
r = reducer.apply(r, transformer.apply((K)t.nextKey, (V)v)); |
6475 |
|
|
t.result = r; |
6476 |
|
|
for (;;) { |
6477 |
|
|
int c; BulkTask<K,V,?> par; MapReduceMappingsToLongTask<K,V> s, p; |
6478 |
|
|
if ((par = t.parent) == null || |
6479 |
|
|
!(par instanceof MapReduceMappingsToLongTask)) { |
6480 |
|
|
t.quietlyComplete(); |
6481 |
|
|
break; |
6482 |
|
|
} |
6483 |
|
|
else if ((c = (p = (MapReduceMappingsToLongTask<K,V>)par).pending) == 0) { |
6484 |
|
|
if ((s = t.sibling) != null) |
6485 |
|
|
r = reducer.apply(r, s.result); |
6486 |
|
|
(t = p).result = r; |
6487 |
|
|
} |
6488 |
|
|
else if (p.casPending(c, 0)) |
6489 |
|
|
break; |
6490 |
|
|
} |
6491 |
dl |
1.4 |
} |
6492 |
dl |
1.119 |
public final Long getRawResult() { return result; } |
6493 |
tim |
1.1 |
} |
6494 |
|
|
|
6495 |
dl |
1.126 |
@SuppressWarnings("serial") |
6496 |
dl |
1.119 |
static final class MapReduceKeysToIntTask<K,V> |
6497 |
|
|
extends BulkTask<K,V,Integer> { |
6498 |
|
|
final ObjectToInt<? super K> transformer; |
6499 |
|
|
final IntByIntToInt reducer; |
6500 |
|
|
final int basis; |
6501 |
|
|
int result; |
6502 |
|
|
MapReduceKeysToIntTask<K,V> sibling; |
6503 |
|
|
MapReduceKeysToIntTask |
6504 |
|
|
(ConcurrentHashMap<K,V> m, |
6505 |
|
|
ObjectToInt<? super K> transformer, |
6506 |
|
|
int basis, |
6507 |
|
|
IntByIntToInt reducer) { |
6508 |
|
|
super(m); |
6509 |
|
|
this.transformer = transformer; |
6510 |
|
|
this.basis = basis; this.reducer = reducer; |
6511 |
|
|
} |
6512 |
|
|
MapReduceKeysToIntTask |
6513 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
6514 |
|
|
ObjectToInt<? super K> transformer, |
6515 |
|
|
int basis, |
6516 |
|
|
IntByIntToInt reducer) { |
6517 |
|
|
super(p, b, split); |
6518 |
|
|
this.transformer = transformer; |
6519 |
|
|
this.basis = basis; this.reducer = reducer; |
6520 |
|
|
} |
6521 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
6522 |
dl |
1.119 |
MapReduceKeysToIntTask<K,V> t = this; |
6523 |
|
|
final ObjectToInt<? super K> transformer = |
6524 |
|
|
this.transformer; |
6525 |
|
|
final IntByIntToInt reducer = this.reducer; |
6526 |
|
|
if (transformer == null || reducer == null) |
6527 |
|
|
throw new Error(NullFunctionMessage); |
6528 |
|
|
final int id = this.basis; |
6529 |
|
|
int b = batch(); |
6530 |
|
|
while (b > 1 && t.baseIndex != t.baseLimit) { |
6531 |
|
|
b >>>= 1; |
6532 |
|
|
t.pending = 1; |
6533 |
|
|
MapReduceKeysToIntTask<K,V> rt = |
6534 |
|
|
new MapReduceKeysToIntTask<K,V> |
6535 |
|
|
(t, b, true, transformer, id, reducer); |
6536 |
|
|
t = new MapReduceKeysToIntTask<K,V> |
6537 |
|
|
(t, b, false, transformer, id, reducer); |
6538 |
|
|
t.sibling = rt; |
6539 |
|
|
rt.sibling = t; |
6540 |
|
|
rt.fork(); |
6541 |
|
|
} |
6542 |
|
|
int r = id; |
6543 |
|
|
while (t.advance() != null) |
6544 |
|
|
r = reducer.apply(r, transformer.apply((K)t.nextKey)); |
6545 |
|
|
t.result = r; |
6546 |
|
|
for (;;) { |
6547 |
|
|
int c; BulkTask<K,V,?> par; MapReduceKeysToIntTask<K,V> s, p; |
6548 |
|
|
if ((par = t.parent) == null || |
6549 |
|
|
!(par instanceof MapReduceKeysToIntTask)) { |
6550 |
|
|
t.quietlyComplete(); |
6551 |
|
|
break; |
6552 |
|
|
} |
6553 |
|
|
else if ((c = (p = (MapReduceKeysToIntTask<K,V>)par).pending) == 0) { |
6554 |
|
|
if ((s = t.sibling) != null) |
6555 |
|
|
r = reducer.apply(r, s.result); |
6556 |
|
|
(t = p).result = r; |
6557 |
|
|
} |
6558 |
|
|
else if (p.casPending(c, 0)) |
6559 |
|
|
break; |
6560 |
|
|
} |
6561 |
dl |
1.30 |
} |
6562 |
dl |
1.119 |
public final Integer getRawResult() { return result; } |
6563 |
dl |
1.30 |
} |
6564 |
|
|
|
6565 |
dl |
1.126 |
@SuppressWarnings("serial") |
6566 |
dl |
1.119 |
static final class MapReduceValuesToIntTask<K,V> |
6567 |
|
|
extends BulkTask<K,V,Integer> { |
6568 |
|
|
final ObjectToInt<? super V> transformer; |
6569 |
|
|
final IntByIntToInt reducer; |
6570 |
|
|
final int basis; |
6571 |
|
|
int result; |
6572 |
|
|
MapReduceValuesToIntTask<K,V> sibling; |
6573 |
|
|
MapReduceValuesToIntTask |
6574 |
|
|
(ConcurrentHashMap<K,V> m, |
6575 |
|
|
ObjectToInt<? super V> transformer, |
6576 |
|
|
int basis, |
6577 |
|
|
IntByIntToInt reducer) { |
6578 |
|
|
super(m); |
6579 |
|
|
this.transformer = transformer; |
6580 |
|
|
this.basis = basis; this.reducer = reducer; |
6581 |
|
|
} |
6582 |
|
|
MapReduceValuesToIntTask |
6583 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
6584 |
|
|
ObjectToInt<? super V> transformer, |
6585 |
|
|
int basis, |
6586 |
|
|
IntByIntToInt reducer) { |
6587 |
|
|
super(p, b, split); |
6588 |
|
|
this.transformer = transformer; |
6589 |
|
|
this.basis = basis; this.reducer = reducer; |
6590 |
|
|
} |
6591 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
6592 |
dl |
1.119 |
MapReduceValuesToIntTask<K,V> t = this; |
6593 |
|
|
final ObjectToInt<? super V> transformer = |
6594 |
|
|
this.transformer; |
6595 |
|
|
final IntByIntToInt reducer = this.reducer; |
6596 |
|
|
if (transformer == null || reducer == null) |
6597 |
|
|
throw new Error(NullFunctionMessage); |
6598 |
|
|
final int id = this.basis; |
6599 |
|
|
int b = batch(); |
6600 |
|
|
while (b > 1 && t.baseIndex != t.baseLimit) { |
6601 |
|
|
b >>>= 1; |
6602 |
|
|
t.pending = 1; |
6603 |
|
|
MapReduceValuesToIntTask<K,V> rt = |
6604 |
|
|
new MapReduceValuesToIntTask<K,V> |
6605 |
|
|
(t, b, true, transformer, id, reducer); |
6606 |
|
|
t = new MapReduceValuesToIntTask<K,V> |
6607 |
|
|
(t, b, false, transformer, id, reducer); |
6608 |
|
|
t.sibling = rt; |
6609 |
|
|
rt.sibling = t; |
6610 |
|
|
rt.fork(); |
6611 |
|
|
} |
6612 |
|
|
int r = id; |
6613 |
|
|
Object v; |
6614 |
|
|
while ((v = t.advance()) != null) |
6615 |
|
|
r = reducer.apply(r, transformer.apply((V)v)); |
6616 |
|
|
t.result = r; |
6617 |
|
|
for (;;) { |
6618 |
|
|
int c; BulkTask<K,V,?> par; MapReduceValuesToIntTask<K,V> s, p; |
6619 |
|
|
if ((par = t.parent) == null || |
6620 |
|
|
!(par instanceof MapReduceValuesToIntTask)) { |
6621 |
|
|
t.quietlyComplete(); |
6622 |
|
|
break; |
6623 |
|
|
} |
6624 |
|
|
else if ((c = (p = (MapReduceValuesToIntTask<K,V>)par).pending) == 0) { |
6625 |
|
|
if ((s = t.sibling) != null) |
6626 |
|
|
r = reducer.apply(r, s.result); |
6627 |
|
|
(t = p).result = r; |
6628 |
dl |
1.4 |
} |
6629 |
dl |
1.119 |
else if (p.casPending(c, 0)) |
6630 |
|
|
break; |
6631 |
dl |
1.2 |
} |
6632 |
tim |
1.1 |
} |
6633 |
dl |
1.119 |
public final Integer getRawResult() { return result; } |
6634 |
tim |
1.1 |
} |
6635 |
|
|
|
6636 |
dl |
1.126 |
@SuppressWarnings("serial") |
6637 |
dl |
1.119 |
static final class MapReduceEntriesToIntTask<K,V> |
6638 |
|
|
extends BulkTask<K,V,Integer> { |
6639 |
|
|
final ObjectToInt<Map.Entry<K,V>> transformer; |
6640 |
|
|
final IntByIntToInt reducer; |
6641 |
|
|
final int basis; |
6642 |
|
|
int result; |
6643 |
|
|
MapReduceEntriesToIntTask<K,V> sibling; |
6644 |
|
|
MapReduceEntriesToIntTask |
6645 |
|
|
(ConcurrentHashMap<K,V> m, |
6646 |
|
|
ObjectToInt<Map.Entry<K,V>> transformer, |
6647 |
|
|
int basis, |
6648 |
|
|
IntByIntToInt reducer) { |
6649 |
|
|
super(m); |
6650 |
|
|
this.transformer = transformer; |
6651 |
|
|
this.basis = basis; this.reducer = reducer; |
6652 |
|
|
} |
6653 |
|
|
MapReduceEntriesToIntTask |
6654 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
6655 |
|
|
ObjectToInt<Map.Entry<K,V>> transformer, |
6656 |
|
|
int basis, |
6657 |
|
|
IntByIntToInt reducer) { |
6658 |
|
|
super(p, b, split); |
6659 |
|
|
this.transformer = transformer; |
6660 |
|
|
this.basis = basis; this.reducer = reducer; |
6661 |
|
|
} |
6662 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
6663 |
dl |
1.119 |
MapReduceEntriesToIntTask<K,V> t = this; |
6664 |
|
|
final ObjectToInt<Map.Entry<K,V>> transformer = |
6665 |
|
|
this.transformer; |
6666 |
|
|
final IntByIntToInt reducer = this.reducer; |
6667 |
|
|
if (transformer == null || reducer == null) |
6668 |
|
|
throw new Error(NullFunctionMessage); |
6669 |
|
|
final int id = this.basis; |
6670 |
|
|
int b = batch(); |
6671 |
|
|
while (b > 1 && t.baseIndex != t.baseLimit) { |
6672 |
|
|
b >>>= 1; |
6673 |
|
|
t.pending = 1; |
6674 |
|
|
MapReduceEntriesToIntTask<K,V> rt = |
6675 |
|
|
new MapReduceEntriesToIntTask<K,V> |
6676 |
|
|
(t, b, true, transformer, id, reducer); |
6677 |
|
|
t = new MapReduceEntriesToIntTask<K,V> |
6678 |
|
|
(t, b, false, transformer, id, reducer); |
6679 |
|
|
t.sibling = rt; |
6680 |
|
|
rt.sibling = t; |
6681 |
|
|
rt.fork(); |
6682 |
|
|
} |
6683 |
|
|
int r = id; |
6684 |
|
|
Object v; |
6685 |
|
|
while ((v = t.advance()) != null) |
6686 |
|
|
r = reducer.apply(r, transformer.apply(entryFor((K)t.nextKey, (V)v))); |
6687 |
|
|
t.result = r; |
6688 |
|
|
for (;;) { |
6689 |
|
|
int c; BulkTask<K,V,?> par; MapReduceEntriesToIntTask<K,V> s, p; |
6690 |
|
|
if ((par = t.parent) == null || |
6691 |
|
|
!(par instanceof MapReduceEntriesToIntTask)) { |
6692 |
|
|
t.quietlyComplete(); |
6693 |
|
|
break; |
6694 |
|
|
} |
6695 |
|
|
else if ((c = (p = (MapReduceEntriesToIntTask<K,V>)par).pending) == 0) { |
6696 |
|
|
if ((s = t.sibling) != null) |
6697 |
|
|
r = reducer.apply(r, s.result); |
6698 |
|
|
(t = p).result = r; |
6699 |
|
|
} |
6700 |
|
|
else if (p.casPending(c, 0)) |
6701 |
|
|
break; |
6702 |
dl |
1.99 |
} |
6703 |
dl |
1.4 |
} |
6704 |
dl |
1.119 |
public final Integer getRawResult() { return result; } |
6705 |
|
|
} |
6706 |
tim |
1.1 |
|
6707 |
dl |
1.126 |
@SuppressWarnings("serial") |
6708 |
dl |
1.119 |
static final class MapReduceMappingsToIntTask<K,V> |
6709 |
|
|
extends BulkTask<K,V,Integer> { |
6710 |
|
|
final ObjectByObjectToInt<? super K, ? super V> transformer; |
6711 |
|
|
final IntByIntToInt reducer; |
6712 |
|
|
final int basis; |
6713 |
|
|
int result; |
6714 |
|
|
MapReduceMappingsToIntTask<K,V> sibling; |
6715 |
|
|
MapReduceMappingsToIntTask |
6716 |
|
|
(ConcurrentHashMap<K,V> m, |
6717 |
|
|
ObjectByObjectToInt<? super K, ? super V> transformer, |
6718 |
|
|
int basis, |
6719 |
|
|
IntByIntToInt reducer) { |
6720 |
|
|
super(m); |
6721 |
|
|
this.transformer = transformer; |
6722 |
|
|
this.basis = basis; this.reducer = reducer; |
6723 |
|
|
} |
6724 |
|
|
MapReduceMappingsToIntTask |
6725 |
|
|
(BulkTask<K,V,?> p, int b, boolean split, |
6726 |
|
|
ObjectByObjectToInt<? super K, ? super V> transformer, |
6727 |
|
|
int basis, |
6728 |
|
|
IntByIntToInt reducer) { |
6729 |
|
|
super(p, b, split); |
6730 |
|
|
this.transformer = transformer; |
6731 |
|
|
this.basis = basis; this.reducer = reducer; |
6732 |
|
|
} |
6733 |
dl |
1.126 |
@SuppressWarnings("unchecked") public final void compute() { |
6734 |
dl |
1.119 |
MapReduceMappingsToIntTask<K,V> t = this; |
6735 |
|
|
final ObjectByObjectToInt<? super K, ? super V> transformer = |
6736 |
|
|
this.transformer; |
6737 |
|
|
final IntByIntToInt reducer = this.reducer; |
6738 |
|
|
if (transformer == null || reducer == null) |
6739 |
|
|
throw new Error(NullFunctionMessage); |
6740 |
|
|
final int id = this.basis; |
6741 |
|
|
int b = batch(); |
6742 |
|
|
while (b > 1 && t.baseIndex != t.baseLimit) { |
6743 |
|
|
b >>>= 1; |
6744 |
|
|
t.pending = 1; |
6745 |
|
|
MapReduceMappingsToIntTask<K,V> rt = |
6746 |
|
|
new MapReduceMappingsToIntTask<K,V> |
6747 |
|
|
(t, b, true, transformer, id, reducer); |
6748 |
|
|
t = new MapReduceMappingsToIntTask<K,V> |
6749 |
|
|
(t, b, false, transformer, id, reducer); |
6750 |
|
|
t.sibling = rt; |
6751 |
|
|
rt.sibling = t; |
6752 |
|
|
rt.fork(); |
6753 |
|
|
} |
6754 |
|
|
int r = id; |
6755 |
|
|
Object v; |
6756 |
|
|
while ((v = t.advance()) != null) |
6757 |
|
|
r = reducer.apply(r, transformer.apply((K)t.nextKey, (V)v)); |
6758 |
|
|
t.result = r; |
6759 |
|
|
for (;;) { |
6760 |
|
|
int c; BulkTask<K,V,?> par; MapReduceMappingsToIntTask<K,V> s, p; |
6761 |
|
|
if ((par = t.parent) == null || |
6762 |
|
|
!(par instanceof MapReduceMappingsToIntTask)) { |
6763 |
|
|
t.quietlyComplete(); |
6764 |
|
|
break; |
6765 |
|
|
} |
6766 |
|
|
else if ((c = (p = (MapReduceMappingsToIntTask<K,V>)par).pending) == 0) { |
6767 |
|
|
if ((s = t.sibling) != null) |
6768 |
|
|
r = reducer.apply(r, s.result); |
6769 |
|
|
(t = p).result = r; |
6770 |
|
|
} |
6771 |
|
|
else if (p.casPending(c, 0)) |
6772 |
|
|
break; |
6773 |
|
|
} |
6774 |
tim |
1.1 |
} |
6775 |
dl |
1.119 |
public final Integer getRawResult() { return result; } |
6776 |
tim |
1.1 |
} |
6777 |
dl |
1.99 |
|
6778 |
dl |
1.119 |
|
6779 |
dl |
1.99 |
// Unsafe mechanics |
6780 |
|
|
private static final sun.misc.Unsafe UNSAFE; |
6781 |
dl |
1.119 |
private static final long counterOffset; |
6782 |
|
|
private static final long sizeCtlOffset; |
6783 |
|
|
private static final long ABASE; |
6784 |
|
|
private static final int ASHIFT; |
6785 |
dl |
1.99 |
|
6786 |
|
|
static { |
6787 |
dl |
1.119 |
int ss; |
6788 |
dl |
1.99 |
try { |
6789 |
dl |
1.126 |
UNSAFE = sun.misc.Unsafe.getUnsafe(); |
6790 |
dl |
1.119 |
Class<?> k = ConcurrentHashMap.class; |
6791 |
|
|
counterOffset = UNSAFE.objectFieldOffset |
6792 |
|
|
(k.getDeclaredField("counter")); |
6793 |
|
|
sizeCtlOffset = UNSAFE.objectFieldOffset |
6794 |
|
|
(k.getDeclaredField("sizeCtl")); |
6795 |
|
|
Class<?> sc = Node[].class; |
6796 |
|
|
ABASE = UNSAFE.arrayBaseOffset(sc); |
6797 |
dl |
1.99 |
ss = UNSAFE.arrayIndexScale(sc); |
6798 |
|
|
} catch (Exception e) { |
6799 |
|
|
throw new Error(e); |
6800 |
|
|
} |
6801 |
dl |
1.119 |
if ((ss & (ss-1)) != 0) |
6802 |
dl |
1.99 |
throw new Error("data type scale not a power of two"); |
6803 |
dl |
1.119 |
ASHIFT = 31 - Integer.numberOfLeadingZeros(ss); |
6804 |
dl |
1.99 |
} |
6805 |
dl |
1.126 |
} |