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*/ |
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package jsr166e; |
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import jsr166e.LongAdder; |
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|
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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.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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|
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import java.io.Serializable; |
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/** |
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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. For aggregate operations such as {@code putAll} and {@code |
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* clear}, concurrent retrievals may reflect insertion or removal of |
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* only some entries. Similarly, Iterators and Enumerations return |
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* elements reflecting the state of the hash table at some point at or |
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* since the creation of the iterator/enumeration. They do |
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* <em>not</em> throw {@link ConcurrentModificationException}. |
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* However, iterators are designed to be used by only one thread at a |
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* time. Bear in mind that the results of aggregate status methods |
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* including {@code size}, {@code isEmpty}, and {@code containsValue} |
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* are typically useful only when a map is not undergoing concurrent |
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* updates in other threads. Otherwise the results of these methods |
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* reflect transient states that may be adequate for monitoring |
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* or estimation purposes, but not for program control. |
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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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* {@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> A {@link Set} projection of a ConcurrentHashMapV8 may be created |
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* (using {@link #newKeySet()} or {@link #newKeySet(int)}), or viewed |
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* (using {@link #keySet(Object)} when only keys are of interest, and the |
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* mapped values are (perhaps transiently) not used or all take the |
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* same mapping value. |
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* |
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* <p> A ConcurrentHashMapV8 can be used as scalable frequency map (a |
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* form of histogram or multiset) by using {@link LongAdder} values |
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* and initializing via {@link #computeIfAbsent}. For example, to add |
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* a count to a {@code ConcurrentHashMapV8<String,LongAdder> freqs}, you |
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* can use {@code freqs.computeIfAbsent(k -> new |
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* LongAdder()).increment();} |
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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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* <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>ConcurrentHashMapV8s support parallel operations using the {@link |
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* ForkJoinPool#commonPool}. (Tasks that may be used in other contexts |
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* are available in class {@link ForkJoinTasks}). These operations are |
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* designed to be safely, and often sensibly, applied even with maps |
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* that are being concurrently updated by other threads; for example, |
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* when computing a snapshot summary of the values in a shared |
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* registry. There are three kinds of operation, each with four |
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* forms, accepting functions with Keys, Values, Entries, and (Key, |
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* Value) arguments and/or return values. (The first three forms are |
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* also available via the {@link #keySet()}, {@link #values()} and |
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* {@link #entrySet()} views). Because the elements of a |
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* ConcurrentHashMapV8 are not ordered in any particular way, and may be |
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* processed in different orders in different parallel executions, the |
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* correctness of supplied functions should not depend on any |
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* ordering, or on any other objects or values that may transiently |
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* change while computation is in progress; and except for forEach |
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* actions, should ideally be side-effect-free. |
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* |
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* <ul> |
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* <li> forEach: Perform a given action on each element. |
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* A variant form applies a given transformation on each element |
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* before performing the action.</li> |
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* |
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* <li> search: Return the first available non-null result of |
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* applying a given function on each element; skipping further |
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* search when a result is found.</li> |
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* |
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* <li> reduce: Accumulate each element. The supplied reduction |
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* function cannot rely on ordering (more formally, it should be |
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* both associative and commutative). There are five variants: |
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* |
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* <ul> |
137 |
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* |
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* <li> Plain reductions. (There is not a form of this method for |
139 |
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* (key, value) function arguments since there is no corresponding |
140 |
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* return type.)</li> |
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* |
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* <li> Mapped reductions that accumulate the results of a given |
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* function applied to each element.</li> |
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* |
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* <li> Reductions to scalar doubles, longs, and ints, using a |
146 |
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* given basis value.</li> |
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* |
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* </li> |
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* </ul> |
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* </ul> |
151 |
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* |
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* <p>The concurrency properties of bulk operations follow |
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* from those of ConcurrentHashMapV8: Any non-null result returned |
154 |
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* from {@code get(key)} and related access methods bears a |
155 |
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* happens-before relation with the associated insertion or |
156 |
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* update. The result of any bulk operation reflects the |
157 |
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* composition of these per-element relations (but is not |
158 |
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* necessarily atomic with respect to the map as a whole unless it |
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* is somehow known to be quiescent). Conversely, because keys |
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* and values in the map are never null, null serves as a reliable |
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* atomic indicator of the current lack of any result. To |
162 |
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* maintain this property, null serves as an implicit basis for |
163 |
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* all non-scalar reduction operations. For the double, long, and |
164 |
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* int versions, the basis should be one that, when combined with |
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* any other value, returns that other value (more formally, it |
166 |
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* should be the identity element for the reduction). Most common |
167 |
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* reductions have these properties; for example, computing a sum |
168 |
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* with basis 0 or a minimum with basis MAX_VALUE. |
169 |
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* |
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* <p>Search and transformation functions provided as arguments |
171 |
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* should similarly return null to indicate the lack of any result |
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* (in which case it is not used). In the case of mapped |
173 |
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* reductions, this also enables transformations to serve as |
174 |
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* filters, returning null (or, in the case of primitive |
175 |
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* specializations, the identity basis) if the element should not |
176 |
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* be combined. You can create compound transformations and |
177 |
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* filterings by composing them yourself under this "null means |
178 |
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* there is nothing there now" rule before using them in search or |
179 |
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* reduce operations. |
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* |
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* <p>Methods accepting and/or returning Entry arguments maintain |
182 |
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* key-value associations. They may be useful for example when |
183 |
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* finding the key for the greatest value. Note that "plain" Entry |
184 |
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* arguments can be supplied using {@code new |
185 |
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* AbstractMap.SimpleEntry(k,v)}. |
186 |
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* |
187 |
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* <p> Bulk operations may complete abruptly, throwing an |
188 |
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* exception encountered in the application of a supplied |
189 |
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* function. Bear in mind when handling such exceptions that other |
190 |
+ |
* concurrently executing functions could also have thrown |
191 |
+ |
* exceptions, or would have done so if the first exception had |
192 |
+ |
* not occurred. |
193 |
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* |
194 |
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* <p>Parallel speedups for bulk operations compared to sequential |
195 |
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* processing are common but not guaranteed. Operations involving |
196 |
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* brief functions on small maps may execute more slowly than |
197 |
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* sequential loops if the underlying work to parallelize the |
198 |
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* computation is more expensive than the computation itself. |
199 |
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* Similarly, parallelization may not lead to much actual parallelism |
200 |
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* if all processors are busy performing unrelated tasks. |
201 |
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* |
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* <p> All arguments to all task methods must be non-null. |
203 |
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* |
204 |
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* <p><em>jsr166e note: During transition, this class |
205 |
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* uses nested functional interfaces with different names but the |
206 |
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* same forms as those expected for JDK8.<em> |
207 |
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* |
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* <p>This class is a member of the |
209 |
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* <a href="{@docRoot}/../technotes/guides/collections/index.html"> |
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* Java Collections Framework</a>. |
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* |
88 |
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* <p><em>jsr166e note: This class is a candidate replacement for |
89 |
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* java.util.concurrent.ConcurrentHashMap.<em> |
90 |
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* |
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* @since 1.5 |
213 |
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* @author Doug Lea |
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* @param <K> the type of keys maintained by this map |
215 |
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* @param <V> the type of mapped values |
216 |
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*/ |
217 |
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public class ConcurrentHashMapV8<K, V> |
218 |
< |
implements ConcurrentMap<K, V>, Serializable { |
218 |
> |
implements ConcurrentMap<K, V>, Serializable { |
219 |
|
private static final long serialVersionUID = 7249069246763182397L; |
220 |
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|
221 |
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/** |
222 |
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* A function computing a mapping from the given key to a value. |
223 |
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* This is a place-holder for an upcoming JDK8 interface. |
222 |
> |
* A partitionable iterator. A Spliterator can be traversed |
223 |
> |
* directly, but can also be partitioned (before traversal) by |
224 |
> |
* creating another Spliterator that covers a non-overlapping |
225 |
> |
* portion of the elements, and so may be amenable to parallel |
226 |
> |
* execution. |
227 |
> |
* |
228 |
> |
* <p> This interface exports a subset of expected JDK8 |
229 |
> |
* functionality. |
230 |
> |
* |
231 |
> |
* <p>Sample usage: Here is one (of the several) ways to compute |
232 |
> |
* the sum of the values held in a map using the ForkJoin |
233 |
> |
* framework. As illustrated here, Spliterators are well suited to |
234 |
> |
* designs in which a task repeatedly splits off half its work |
235 |
> |
* into forked subtasks until small enough to process directly, |
236 |
> |
* and then joins these subtasks. Variants of this style can also |
237 |
> |
* be used in completion-based designs. |
238 |
> |
* |
239 |
> |
* <pre> |
240 |
> |
* {@code ConcurrentHashMapV8<String, Long> m = ... |
241 |
> |
* // split as if have 8 * parallelism, for load balance |
242 |
> |
* int n = m.size(); |
243 |
> |
* int p = aForkJoinPool.getParallelism() * 8; |
244 |
> |
* int split = (n < p)? n : p; |
245 |
> |
* long sum = aForkJoinPool.invoke(new SumValues(m.valueSpliterator(), split, null)); |
246 |
> |
* // ... |
247 |
> |
* static class SumValues extends RecursiveTask<Long> { |
248 |
> |
* final Spliterator<Long> s; |
249 |
> |
* final int split; // split while > 1 |
250 |
> |
* final SumValues nextJoin; // records forked subtasks to join |
251 |
> |
* SumValues(Spliterator<Long> s, int depth, SumValues nextJoin) { |
252 |
> |
* this.s = s; this.depth = depth; this.nextJoin = nextJoin; |
253 |
> |
* } |
254 |
> |
* public Long compute() { |
255 |
> |
* long sum = 0; |
256 |
> |
* SumValues subtasks = null; // fork subtasks |
257 |
> |
* for (int s = split >>> 1; s > 0; s >>>= 1) |
258 |
> |
* (subtasks = new SumValues(s.split(), s, subtasks)).fork(); |
259 |
> |
* while (s.hasNext()) // directly process remaining elements |
260 |
> |
* sum += s.next(); |
261 |
> |
* for (SumValues t = subtasks; t != null; t = t.nextJoin) |
262 |
> |
* sum += t.join(); // collect subtask results |
263 |
> |
* return sum; |
264 |
> |
* } |
265 |
> |
* } |
266 |
> |
* }</pre> |
267 |
|
*/ |
268 |
< |
public static interface MappingFunction<K, V> { |
268 |
> |
public static interface Spliterator<T> extends Iterator<T> { |
269 |
|
/** |
270 |
< |
* Returns a non-null value for the given key. |
270 |
> |
* Returns a Spliterator covering approximately half of the |
271 |
> |
* elements, guaranteed not to overlap with those subsequently |
272 |
> |
* returned by this Spliterator. After invoking this method, |
273 |
> |
* the current Spliterator will <em>not</em> produce any of |
274 |
> |
* the elements of the returned Spliterator, but the two |
275 |
> |
* Spliterators together will produce all of the elements that |
276 |
> |
* would have been produced by this Spliterator had this |
277 |
> |
* method not been called. The exact number of elements |
278 |
> |
* produced by the returned Spliterator is not guaranteed, and |
279 |
> |
* may be zero (i.e., with {@code hasNext()} reporting {@code |
280 |
> |
* false}) if this Spliterator cannot be further split. |
281 |
|
* |
282 |
< |
* @param key the (non-null) key |
283 |
< |
* @return a non-null value |
282 |
> |
* @return a Spliterator covering approximately half of the |
283 |
> |
* elements |
284 |
> |
* @throws IllegalStateException if this Spliterator has |
285 |
> |
* already commenced traversing elements |
286 |
|
*/ |
287 |
< |
V map(K key); |
287 |
> |
Spliterator<T> split(); |
288 |
|
} |
289 |
|
|
114 |
– |
/** |
115 |
– |
* A function computing a new mapping given a key and its current |
116 |
– |
* mapped value (or {@code null} if there is no current |
117 |
– |
* mapping). This is a place-holder for an upcoming JDK8 |
118 |
– |
* interface. |
119 |
– |
*/ |
120 |
– |
public static interface RemappingFunction<K, V> { |
121 |
– |
/** |
122 |
– |
* Returns a new value given a key and its current value. |
123 |
– |
* |
124 |
– |
* @param key the (non-null) key |
125 |
– |
* @param value the current value, or null if there is no mapping |
126 |
– |
* @return a non-null value |
127 |
– |
*/ |
128 |
– |
V remap(K key, V value); |
129 |
– |
} |
290 |
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|
291 |
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/* |
292 |
|
* Overview: |
307 |
|
* supplying null-checks and casts as needed. This also allows |
308 |
|
* many of the public methods to be factored into a smaller number |
309 |
|
* of internal methods (although sadly not so for the five |
310 |
< |
* sprawling variants of put-related operations). |
310 |
> |
* variants of put-related operations). The validation-based |
311 |
> |
* approach explained below leads to a lot of code sprawl because |
312 |
> |
* retry-control precludes factoring into smaller methods. |
313 |
|
* |
314 |
|
* The table is lazily initialized to a power-of-two size upon the |
315 |
< |
* first insertion. Each bin in the table contains a list of |
316 |
< |
* Nodes (most often, the list has only zero or one Node). Table |
317 |
< |
* accesses require volatile/atomic reads, writes, and CASes. |
318 |
< |
* Because there is no other way to arrange this without adding |
319 |
< |
* further indirections, we use intrinsics (sun.misc.Unsafe) |
320 |
< |
* operations. The lists of nodes within bins are always |
321 |
< |
* accurately traversable under volatile reads, so long as lookups |
322 |
< |
* check hash code and non-nullness of value before checking key |
323 |
< |
* equality. |
315 |
> |
* first insertion. Each bin in the table normally contains a |
316 |
> |
* list of Nodes (most often, the list has only zero or one Node). |
317 |
> |
* Table accesses require volatile/atomic reads, writes, and |
318 |
> |
* CASes. Because there is no other way to arrange this without |
319 |
> |
* adding further indirections, we use intrinsics |
320 |
> |
* (sun.misc.Unsafe) operations. The lists of nodes within bins |
321 |
> |
* are always accurately traversable under volatile reads, so long |
322 |
> |
* as lookups check hash code and non-nullness of value before |
323 |
> |
* checking key equality. |
324 |
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* |
325 |
|
* We use the top two bits of Node hash fields for control |
326 |
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* purposes -- they are available anyway because of addressing |
332 |
|
* 10 - Node is a forwarding node |
333 |
|
* |
334 |
|
* The lower 30 bits of each Node's hash field contain a |
335 |
< |
* transformation (for better randomization -- method "spread") of |
336 |
< |
* the key's hash code, except for forwarding nodes, for which the |
337 |
< |
* lower bits are zero (and so always have hash field == MOVED). |
335 |
> |
* transformation of the key's hash code, except for forwarding |
336 |
> |
* nodes, for which the lower bits are zero (and so always have |
337 |
> |
* hash field == MOVED). |
338 |
|
* |
339 |
|
* Insertion (via put or its variants) of the first node in an |
340 |
|
* empty bin is performed by just CASing it to the bin. This is |
341 |
< |
* by far the most common case for put operations. Other update |
342 |
< |
* operations (insert, delete, and replace) require locks. We do |
343 |
< |
* not want to waste the space required to associate a distinct |
344 |
< |
* lock object with each bin, so instead use the first node of a |
345 |
< |
* bin list itself as a lock. Blocking support for these locks |
346 |
< |
* relies on the builtin "synchronized" monitors. However, we |
347 |
< |
* also need a tryLock construction, so we overlay these by using |
348 |
< |
* bits of the Node hash field for lock control (see above), and |
349 |
< |
* so normally use builtin monitors only for blocking and |
350 |
< |
* signalling using wait/notifyAll constructions. See |
351 |
< |
* Node.tryAwaitLock. |
341 |
> |
* by far the most common case for put operations under most |
342 |
> |
* key/hash distributions. Other update operations (insert, |
343 |
> |
* delete, and replace) require locks. We do not want to waste |
344 |
> |
* the space required to associate a distinct lock object with |
345 |
> |
* each bin, so instead use the first node of a bin list itself as |
346 |
> |
* a lock. Blocking support for these locks relies on the builtin |
347 |
> |
* "synchronized" monitors. However, we also need a tryLock |
348 |
> |
* construction, so we overlay these by using bits of the Node |
349 |
> |
* hash field for lock control (see above), and so normally use |
350 |
> |
* builtin monitors only for blocking and signalling using |
351 |
> |
* wait/notifyAll constructions. See Node.tryAwaitLock. |
352 |
|
* |
353 |
|
* Using the first node of a list as a lock does not by itself |
354 |
|
* suffice though: When a node is locked, any update must first |
363 |
|
* The main disadvantage of per-bin locks is that other update |
364 |
|
* operations on other nodes in a bin list protected by the same |
365 |
|
* lock can stall, for example when user equals() or mapping |
366 |
< |
* functions take a long time. However, statistically, this is |
367 |
< |
* not a common enough problem to outweigh the time/space overhead |
368 |
< |
* of alternatives: Under random hash codes, the frequency of |
207 |
< |
* nodes in bins follows a Poisson distribution |
366 |
> |
* functions take a long time. However, statistically, under |
367 |
> |
* random hash codes, this is not a common problem. Ideally, the |
368 |
> |
* frequency of nodes in bins follows a Poisson distribution |
369 |
|
* (http://en.wikipedia.org/wiki/Poisson_distribution) with a |
370 |
|
* parameter of about 0.5 on average, given the resizing threshold |
371 |
|
* of 0.75, although with a large variance because of resizing |
372 |
|
* granularity. Ignoring variance, the expected occurrences of |
373 |
|
* list size k are (exp(-0.5) * pow(0.5, k) / factorial(k)). The |
374 |
< |
* first few values are: |
374 |
> |
* first values are: |
375 |
|
* |
376 |
< |
* 0: 0.607 |
377 |
< |
* 1: 0.303 |
378 |
< |
* 2: 0.076 |
379 |
< |
* 3: 0.012 |
380 |
< |
* more: 0.002 |
376 |
> |
* 0: 0.60653066 |
377 |
> |
* 1: 0.30326533 |
378 |
> |
* 2: 0.07581633 |
379 |
> |
* 3: 0.01263606 |
380 |
> |
* 4: 0.00157952 |
381 |
> |
* 5: 0.00015795 |
382 |
> |
* 6: 0.00001316 |
383 |
> |
* 7: 0.00000094 |
384 |
> |
* 8: 0.00000006 |
385 |
> |
* more: less than 1 in ten million |
386 |
|
* |
387 |
|
* Lock contention probability for two threads accessing distinct |
388 |
< |
* elements is roughly 1 / (8 * #elements). Function "spread" |
389 |
< |
* performs hashCode randomization that improves the likelihood |
390 |
< |
* that these assumptions hold unless users define exactly the |
391 |
< |
* same value for too many hashCodes. |
388 |
> |
* elements is roughly 1 / (8 * #elements) under random hashes. |
389 |
> |
* |
390 |
> |
* Actual hash code distributions encountered in practice |
391 |
> |
* sometimes deviate significantly from uniform randomness. This |
392 |
> |
* includes the case when N > (1<<30), so some keys MUST collide. |
393 |
> |
* Similarly for dumb or hostile usages in which multiple keys are |
394 |
> |
* designed to have identical hash codes. Also, although we guard |
395 |
> |
* against the worst effects of this (see method spread), sets of |
396 |
> |
* hashes may differ only in bits that do not impact their bin |
397 |
> |
* index for a given power-of-two mask. So we use a secondary |
398 |
> |
* strategy that applies when the number of nodes in a bin exceeds |
399 |
> |
* a threshold, and at least one of the keys implements |
400 |
> |
* Comparable. These TreeBins use a balanced tree to hold nodes |
401 |
> |
* (a specialized form of red-black trees), bounding search time |
402 |
> |
* to O(log N). Each search step in a TreeBin is around twice as |
403 |
> |
* slow as in a regular list, but given that N cannot exceed |
404 |
> |
* (1<<64) (before running out of addresses) this bounds search |
405 |
> |
* steps, lock hold times, etc, to reasonable constants (roughly |
406 |
> |
* 100 nodes inspected per operation worst case) so long as keys |
407 |
> |
* are Comparable (which is very common -- String, Long, etc). |
408 |
> |
* TreeBin nodes (TreeNodes) also maintain the same "next" |
409 |
> |
* traversal pointers as regular nodes, so can be traversed in |
410 |
> |
* iterators in the same way. |
411 |
|
* |
412 |
< |
* The table is resized when occupancy exceeds an occupancy |
412 |
> |
* The table is resized when occupancy exceeds a percentage |
413 |
|
* threshold (nominally, 0.75, but see below). Only a single |
414 |
|
* thread performs the resize (using field "sizeCtl", to arrange |
415 |
|
* exclusion), but the table otherwise remains usable for reads |
430 |
|
* |
431 |
|
* Each bin transfer requires its bin lock. However, unlike other |
432 |
|
* cases, a transfer can skip a bin if it fails to acquire its |
433 |
< |
* lock, and revisit it later. Method rebuild maintains a buffer |
434 |
< |
* of TRANSFER_BUFFER_SIZE bins that have been skipped because of |
435 |
< |
* failure to acquire a lock, and blocks only if none are |
436 |
< |
* available (i.e., only very rarely). The transfer operation |
437 |
< |
* must also ensure that all accessible bins in both the old and |
438 |
< |
* new table are usable by any traversal. When there are no lock |
439 |
< |
* acquisition failures, this is arranged simply by proceeding |
440 |
< |
* from the last bin (table.length - 1) up towards the first. |
441 |
< |
* Upon seeing a forwarding node, traversals (see class |
442 |
< |
* InternalIterator) arrange to move to the new table without |
443 |
< |
* revisiting nodes. However, when any node is skipped during a |
444 |
< |
* transfer, all earlier table bins may have become visible, so |
445 |
< |
* are initialized with a reverse-forwarding node back to the old |
446 |
< |
* table until the new ones are established. (This sometimes |
447 |
< |
* requires transiently locking a forwarding node, which is |
448 |
< |
* possible under the above encoding.) These more expensive |
433 |
> |
* lock, and revisit it later (unless it is a TreeBin). Method |
434 |
> |
* rebuild maintains a buffer of TRANSFER_BUFFER_SIZE bins that |
435 |
> |
* have been skipped because of failure to acquire a lock, and |
436 |
> |
* blocks only if none are available (i.e., only very rarely). |
437 |
> |
* The transfer operation must also ensure that all accessible |
438 |
> |
* bins in both the old and new table are usable by any traversal. |
439 |
> |
* When there are no lock acquisition failures, this is arranged |
440 |
> |
* simply by proceeding from the last bin (table.length - 1) up |
441 |
> |
* towards the first. Upon seeing a forwarding node, traversals |
442 |
> |
* (see class Iter) arrange to move to the new table |
443 |
> |
* without revisiting nodes. However, when any node is skipped |
444 |
> |
* during a transfer, all earlier table bins may have become |
445 |
> |
* visible, so are initialized with a reverse-forwarding node back |
446 |
> |
* to the old table until the new ones are established. (This |
447 |
> |
* sometimes requires transiently locking a forwarding node, which |
448 |
> |
* is possible under the above encoding.) These more expensive |
449 |
|
* mechanics trigger only when necessary. |
450 |
|
* |
451 |
|
* The traversal scheme also applies to partial traversals of |
452 |
< |
* ranges of bins (via an alternate InternalIterator constructor) |
453 |
< |
* to support partitioned aggregate operations (that are not |
454 |
< |
* otherwise implemented yet). Also, read-only operations give up |
455 |
< |
* if ever forwarded to a null table, which provides support for |
456 |
< |
* shutdown-style clearing, which is also not currently |
272 |
< |
* implemented. |
452 |
> |
* ranges of bins (via an alternate Traverser constructor) |
453 |
> |
* to support partitioned aggregate operations. Also, read-only |
454 |
> |
* operations give up if ever forwarded to a null table, which |
455 |
> |
* provides support for shutdown-style clearing, which is also not |
456 |
> |
* currently implemented. |
457 |
|
* |
458 |
|
* Lazy table initialization minimizes footprint until first use, |
459 |
|
* and also avoids resizings when the first operation is from a |
531 |
|
*/ |
532 |
|
private static final int TRANSFER_BUFFER_SIZE = 32; |
533 |
|
|
534 |
+ |
/** |
535 |
+ |
* The bin count threshold for using a tree rather than list for a |
536 |
+ |
* bin. The value reflects the approximate break-even point for |
537 |
+ |
* using tree-based operations. |
538 |
+ |
*/ |
539 |
+ |
private static final int TREE_THRESHOLD = 8; |
540 |
+ |
|
541 |
|
/* |
542 |
|
* Encodings for special uses of Node hash fields. See above for |
543 |
|
* explanation. |
570 |
|
private transient volatile int sizeCtl; |
571 |
|
|
572 |
|
// views |
573 |
< |
private transient KeySet<K,V> keySet; |
574 |
< |
private transient Values<K,V> values; |
575 |
< |
private transient EntrySet<K,V> entrySet; |
573 |
> |
private transient KeySetView<K,V> keySet; |
574 |
> |
private transient ValuesView<K,V> values; |
575 |
> |
private transient EntrySetView<K,V> entrySet; |
576 |
|
|
577 |
|
/** For serialization compatibility. Null unless serialized; see below */ |
578 |
|
private Segment<K,V>[] segments; |
579 |
|
|
580 |
+ |
/* ---------------- Table element access -------------- */ |
581 |
+ |
|
582 |
+ |
/* |
583 |
+ |
* Volatile access methods are used for table elements as well as |
584 |
+ |
* elements of in-progress next table while resizing. Uses are |
585 |
+ |
* null checked by callers, and implicitly bounds-checked, relying |
586 |
+ |
* on the invariants that tab arrays have non-zero size, and all |
587 |
+ |
* indices are masked with (tab.length - 1) which is never |
588 |
+ |
* negative and always less than length. Note that, to be correct |
589 |
+ |
* wrt arbitrary concurrency errors by users, bounds checks must |
590 |
+ |
* operate on local variables, which accounts for some odd-looking |
591 |
+ |
* inline assignments below. |
592 |
+ |
*/ |
593 |
+ |
|
594 |
+ |
static final Node tabAt(Node[] tab, int i) { // used by Iter |
595 |
+ |
return (Node)UNSAFE.getObjectVolatile(tab, ((long)i<<ASHIFT)+ABASE); |
596 |
+ |
} |
597 |
+ |
|
598 |
+ |
private static final boolean casTabAt(Node[] tab, int i, Node c, Node v) { |
599 |
+ |
return UNSAFE.compareAndSwapObject(tab, ((long)i<<ASHIFT)+ABASE, c, v); |
600 |
+ |
} |
601 |
+ |
|
602 |
+ |
private static final void setTabAt(Node[] tab, int i, Node v) { |
603 |
+ |
UNSAFE.putObjectVolatile(tab, ((long)i<<ASHIFT)+ABASE, v); |
604 |
+ |
} |
605 |
+ |
|
606 |
|
/* ---------------- Nodes -------------- */ |
607 |
|
|
608 |
|
/** |
609 |
|
* Key-value entry. Note that this is never exported out as a |
610 |
< |
* user-visible Map.Entry (see WriteThroughEntry and SnapshotEntry |
611 |
< |
* below). Nodes with a hash field of MOVED are special, and do |
612 |
< |
* not contain user keys or values. Otherwise, keys are never |
613 |
< |
* null, and null val fields indicate that a node is in the |
614 |
< |
* process of being deleted or created. For purposes of read-only |
615 |
< |
* access, a key may be read before a val, but can only be used |
616 |
< |
* after checking val to be non-null. |
610 |
> |
* user-visible Map.Entry (see MapEntry below). Nodes with a hash |
611 |
> |
* field of MOVED are special, and do not contain user keys or |
612 |
> |
* values. Otherwise, keys are never null, and null val fields |
613 |
> |
* indicate that a node is in the process of being deleted or |
614 |
> |
* created. For purposes of read-only access, a key may be read |
615 |
> |
* before a val, but can only be used after checking val to be |
616 |
> |
* non-null. |
617 |
|
*/ |
618 |
< |
static final class Node { |
618 |
> |
static class Node { |
619 |
|
volatile int hash; |
620 |
|
final Object key; |
621 |
|
volatile Object val; |
649 |
|
* unlocking lock (via a failed CAS from non-waiting LOCKED |
650 |
|
* state), unlockers acquire the sync lock and perform a |
651 |
|
* notifyAll. |
652 |
+ |
* |
653 |
+ |
* The initial sanity check on tab and bounds is not currently |
654 |
+ |
* necessary in the only usages of this method, but enables |
655 |
+ |
* use in other future contexts. |
656 |
|
*/ |
657 |
|
final void tryAwaitLock(Node[] tab, int i) { |
658 |
< |
if (tab != null && i >= 0 && i < tab.length) { // bounds check |
658 |
> |
if (tab != null && i >= 0 && i < tab.length) { // sanity check |
659 |
> |
int r = ThreadLocalRandom.current().nextInt(); // randomize spins |
660 |
|
int spins = MAX_SPINS, h; |
661 |
|
while (tabAt(tab, i) == this && ((h = hash) & LOCKED) != 0) { |
662 |
|
if (spins >= 0) { |
663 |
< |
if (--spins == MAX_SPINS >>> 1) |
664 |
< |
Thread.yield(); // heuristically yield mid-way |
663 |
> |
r ^= r << 1; r ^= r >>> 3; r ^= r << 10; // xorshift |
664 |
> |
if (r >= 0 && --spins == 0) |
665 |
> |
Thread.yield(); // yield before block |
666 |
|
} |
667 |
|
else if (casHash(h, h | WAITING)) { |
668 |
|
synchronized (this) { |
699 |
|
} |
700 |
|
} |
701 |
|
|
702 |
< |
/* ---------------- Table element access -------------- */ |
702 |
> |
/* ---------------- TreeBins -------------- */ |
703 |
|
|
704 |
< |
/* |
705 |
< |
* Volatile access methods are used for table elements as well as |
483 |
< |
* elements of in-progress next table while resizing. Uses are |
484 |
< |
* null checked by callers, and implicitly bounds-checked, relying |
485 |
< |
* on the invariants that tab arrays have non-zero size, and all |
486 |
< |
* indices are masked with (tab.length - 1) which is never |
487 |
< |
* negative and always less than length. Note that, to be correct |
488 |
< |
* wrt arbitrary concurrency errors by users, bounds checks must |
489 |
< |
* operate on local variables, which accounts for some odd-looking |
490 |
< |
* inline assignments below. |
704 |
> |
/** |
705 |
> |
* Nodes for use in TreeBins |
706 |
|
*/ |
707 |
< |
|
708 |
< |
static final Node tabAt(Node[] tab, int i) { // used by InternalIterator |
709 |
< |
return (Node)UNSAFE.getObjectVolatile(tab, ((long)i<<ASHIFT)+ABASE); |
707 |
> |
static final class TreeNode extends Node { |
708 |
> |
TreeNode parent; // red-black tree links |
709 |
> |
TreeNode left; |
710 |
> |
TreeNode right; |
711 |
> |
TreeNode prev; // needed to unlink next upon deletion |
712 |
> |
boolean red; |
713 |
> |
|
714 |
> |
TreeNode(int hash, Object key, Object val, Node next, TreeNode parent) { |
715 |
> |
super(hash, key, val, next); |
716 |
> |
this.parent = parent; |
717 |
> |
} |
718 |
|
} |
719 |
|
|
720 |
< |
private static final boolean casTabAt(Node[] tab, int i, Node c, Node v) { |
721 |
< |
return UNSAFE.compareAndSwapObject(tab, ((long)i<<ASHIFT)+ABASE, c, v); |
722 |
< |
} |
720 |
> |
/** |
721 |
> |
* A specialized form of red-black tree for use in bins |
722 |
> |
* whose size exceeds a threshold. |
723 |
> |
* |
724 |
> |
* TreeBins use a special form of comparison for search and |
725 |
> |
* related operations (which is the main reason we cannot use |
726 |
> |
* existing collections such as TreeMaps). TreeBins contain |
727 |
> |
* Comparable elements, but may contain others, as well as |
728 |
> |
* elements that are Comparable but not necessarily Comparable<T> |
729 |
> |
* for the same T, so we cannot invoke compareTo among them. To |
730 |
> |
* handle this, the tree is ordered primarily by hash value, then |
731 |
> |
* by getClass().getName() order, and then by Comparator order |
732 |
> |
* among elements of the same class. On lookup at a node, if |
733 |
> |
* elements are not comparable or compare as 0, both left and |
734 |
> |
* right children may need to be searched in the case of tied hash |
735 |
> |
* values. (This corresponds to the full list search that would be |
736 |
> |
* necessary if all elements were non-Comparable and had tied |
737 |
> |
* hashes.) The red-black balancing code is updated from |
738 |
> |
* pre-jdk-collections |
739 |
> |
* (http://gee.cs.oswego.edu/dl/classes/collections/RBCell.java) |
740 |
> |
* based in turn on Cormen, Leiserson, and Rivest "Introduction to |
741 |
> |
* Algorithms" (CLR). |
742 |
> |
* |
743 |
> |
* TreeBins also maintain a separate locking discipline than |
744 |
> |
* regular bins. Because they are forwarded via special MOVED |
745 |
> |
* nodes at bin heads (which can never change once established), |
746 |
> |
* we cannot use those nodes as locks. Instead, TreeBin |
747 |
> |
* extends AbstractQueuedSynchronizer to support a simple form of |
748 |
> |
* read-write lock. For update operations and table validation, |
749 |
> |
* the exclusive form of lock behaves in the same way as bin-head |
750 |
> |
* locks. However, lookups use shared read-lock mechanics to allow |
751 |
> |
* multiple readers in the absence of writers. Additionally, |
752 |
> |
* these lookups do not ever block: While the lock is not |
753 |
> |
* available, they proceed along the slow traversal path (via |
754 |
> |
* next-pointers) until the lock becomes available or the list is |
755 |
> |
* exhausted, whichever comes first. (These cases are not fast, |
756 |
> |
* but maximize aggregate expected throughput.) The AQS mechanics |
757 |
> |
* for doing this are straightforward. The lock state is held as |
758 |
> |
* AQS getState(). Read counts are negative; the write count (1) |
759 |
> |
* is positive. There are no signalling preferences among readers |
760 |
> |
* and writers. Since we don't need to export full Lock API, we |
761 |
> |
* just override the minimal AQS methods and use them directly. |
762 |
> |
*/ |
763 |
> |
static final class TreeBin extends AbstractQueuedSynchronizer { |
764 |
> |
private static final long serialVersionUID = 2249069246763182397L; |
765 |
> |
transient TreeNode root; // root of tree |
766 |
> |
transient TreeNode first; // head of next-pointer list |
767 |
|
|
768 |
< |
private static final void setTabAt(Node[] tab, int i, Node v) { |
769 |
< |
UNSAFE.putObjectVolatile(tab, ((long)i<<ASHIFT)+ABASE, v); |
770 |
< |
} |
768 |
> |
/* AQS overrides */ |
769 |
> |
public final boolean isHeldExclusively() { return getState() > 0; } |
770 |
> |
public final boolean tryAcquire(int ignore) { |
771 |
> |
if (compareAndSetState(0, 1)) { |
772 |
> |
setExclusiveOwnerThread(Thread.currentThread()); |
773 |
> |
return true; |
774 |
> |
} |
775 |
> |
return false; |
776 |
> |
} |
777 |
> |
public final boolean tryRelease(int ignore) { |
778 |
> |
setExclusiveOwnerThread(null); |
779 |
> |
setState(0); |
780 |
> |
return true; |
781 |
> |
} |
782 |
> |
public final int tryAcquireShared(int ignore) { |
783 |
> |
for (int c;;) { |
784 |
> |
if ((c = getState()) > 0) |
785 |
> |
return -1; |
786 |
> |
if (compareAndSetState(c, c -1)) |
787 |
> |
return 1; |
788 |
> |
} |
789 |
> |
} |
790 |
> |
public final boolean tryReleaseShared(int ignore) { |
791 |
> |
int c; |
792 |
> |
do {} while (!compareAndSetState(c = getState(), c + 1)); |
793 |
> |
return c == -1; |
794 |
> |
} |
795 |
> |
|
796 |
> |
/** From CLR */ |
797 |
> |
private void rotateLeft(TreeNode p) { |
798 |
> |
if (p != null) { |
799 |
> |
TreeNode r = p.right, pp, rl; |
800 |
> |
if ((rl = p.right = r.left) != null) |
801 |
> |
rl.parent = p; |
802 |
> |
if ((pp = r.parent = p.parent) == null) |
803 |
> |
root = r; |
804 |
> |
else if (pp.left == p) |
805 |
> |
pp.left = r; |
806 |
> |
else |
807 |
> |
pp.right = r; |
808 |
> |
r.left = p; |
809 |
> |
p.parent = r; |
810 |
> |
} |
811 |
> |
} |
812 |
|
|
813 |
< |
/* ---------------- Internal access and update methods -------------- */ |
813 |
> |
/** From CLR */ |
814 |
> |
private void rotateRight(TreeNode p) { |
815 |
> |
if (p != null) { |
816 |
> |
TreeNode l = p.left, pp, lr; |
817 |
> |
if ((lr = p.left = l.right) != null) |
818 |
> |
lr.parent = p; |
819 |
> |
if ((pp = l.parent = p.parent) == null) |
820 |
> |
root = l; |
821 |
> |
else if (pp.right == p) |
822 |
> |
pp.right = l; |
823 |
> |
else |
824 |
> |
pp.left = l; |
825 |
> |
l.right = p; |
826 |
> |
p.parent = l; |
827 |
> |
} |
828 |
> |
} |
829 |
|
|
830 |
< |
/** |
831 |
< |
* Applies a supplemental hash function to a given hashCode, which |
832 |
< |
* defends against poor quality hash functions. The result must |
833 |
< |
* be have the top 2 bits clear. For reasonable performance, this |
834 |
< |
* function must have good avalanche properties; i.e., that each |
835 |
< |
* bit of the argument affects each bit of the result. (Although |
836 |
< |
* we don't care about the unused top 2 bits.) |
830 |
> |
/** |
831 |
> |
* Returns the TreeNode (or null if not found) for the given key |
832 |
> |
* starting at given root. |
833 |
> |
*/ |
834 |
> |
@SuppressWarnings("unchecked") final TreeNode getTreeNode |
835 |
> |
(int h, Object k, TreeNode p) { |
836 |
> |
Class<?> c = k.getClass(); |
837 |
> |
while (p != null) { |
838 |
> |
int dir, ph; Object pk; Class<?> pc; |
839 |
> |
if ((ph = p.hash) == h) { |
840 |
> |
if ((pk = p.key) == k || k.equals(pk)) |
841 |
> |
return p; |
842 |
> |
if (c != (pc = pk.getClass()) || |
843 |
> |
!(k instanceof Comparable) || |
844 |
> |
(dir = ((Comparable)k).compareTo((Comparable)pk)) == 0) { |
845 |
> |
dir = (c == pc) ? 0 : c.getName().compareTo(pc.getName()); |
846 |
> |
TreeNode r = null, s = null, pl, pr; |
847 |
> |
if (dir >= 0) { |
848 |
> |
if ((pl = p.left) != null && h <= pl.hash) |
849 |
> |
s = pl; |
850 |
> |
} |
851 |
> |
else if ((pr = p.right) != null && h >= pr.hash) |
852 |
> |
s = pr; |
853 |
> |
if (s != null && (r = getTreeNode(h, k, s)) != null) |
854 |
> |
return r; |
855 |
> |
} |
856 |
> |
} |
857 |
> |
else |
858 |
> |
dir = (h < ph) ? -1 : 1; |
859 |
> |
p = (dir > 0) ? p.right : p.left; |
860 |
> |
} |
861 |
> |
return null; |
862 |
> |
} |
863 |
> |
|
864 |
> |
/** |
865 |
> |
* Wrapper for getTreeNode used by CHM.get. Tries to obtain |
866 |
> |
* read-lock to call getTreeNode, but during failure to get |
867 |
> |
* lock, searches along next links. |
868 |
> |
*/ |
869 |
> |
final Object getValue(int h, Object k) { |
870 |
> |
Node r = null; |
871 |
> |
int c = getState(); // Must read lock state first |
872 |
> |
for (Node e = first; e != null; e = e.next) { |
873 |
> |
if (c <= 0 && compareAndSetState(c, c - 1)) { |
874 |
> |
try { |
875 |
> |
r = getTreeNode(h, k, root); |
876 |
> |
} finally { |
877 |
> |
releaseShared(0); |
878 |
> |
} |
879 |
> |
break; |
880 |
> |
} |
881 |
> |
else if ((e.hash & HASH_BITS) == h && k.equals(e.key)) { |
882 |
> |
r = e; |
883 |
> |
break; |
884 |
> |
} |
885 |
> |
else |
886 |
> |
c = getState(); |
887 |
> |
} |
888 |
> |
return r == null ? null : r.val; |
889 |
> |
} |
890 |
> |
|
891 |
> |
/** |
892 |
> |
* Finds or adds a node. |
893 |
> |
* @return null if added |
894 |
> |
*/ |
895 |
> |
@SuppressWarnings("unchecked") final TreeNode putTreeNode |
896 |
> |
(int h, Object k, Object v) { |
897 |
> |
Class<?> c = k.getClass(); |
898 |
> |
TreeNode pp = root, p = null; |
899 |
> |
int dir = 0; |
900 |
> |
while (pp != null) { // find existing node or leaf to insert at |
901 |
> |
int ph; Object pk; Class<?> pc; |
902 |
> |
p = pp; |
903 |
> |
if ((ph = p.hash) == h) { |
904 |
> |
if ((pk = p.key) == k || k.equals(pk)) |
905 |
> |
return p; |
906 |
> |
if (c != (pc = pk.getClass()) || |
907 |
> |
!(k instanceof Comparable) || |
908 |
> |
(dir = ((Comparable)k).compareTo((Comparable)pk)) == 0) { |
909 |
> |
dir = (c == pc) ? 0 : c.getName().compareTo(pc.getName()); |
910 |
> |
TreeNode r = null, s = null, pl, pr; |
911 |
> |
if (dir >= 0) { |
912 |
> |
if ((pl = p.left) != null && h <= pl.hash) |
913 |
> |
s = pl; |
914 |
> |
} |
915 |
> |
else if ((pr = p.right) != null && h >= pr.hash) |
916 |
> |
s = pr; |
917 |
> |
if (s != null && (r = getTreeNode(h, k, s)) != null) |
918 |
> |
return r; |
919 |
> |
} |
920 |
> |
} |
921 |
> |
else |
922 |
> |
dir = (h < ph) ? -1 : 1; |
923 |
> |
pp = (dir > 0) ? p.right : p.left; |
924 |
> |
} |
925 |
> |
|
926 |
> |
TreeNode f = first; |
927 |
> |
TreeNode x = first = new TreeNode(h, k, v, f, p); |
928 |
> |
if (p == null) |
929 |
> |
root = x; |
930 |
> |
else { // attach and rebalance; adapted from CLR |
931 |
> |
TreeNode xp, xpp; |
932 |
> |
if (f != null) |
933 |
> |
f.prev = x; |
934 |
> |
if (dir <= 0) |
935 |
> |
p.left = x; |
936 |
> |
else |
937 |
> |
p.right = x; |
938 |
> |
x.red = true; |
939 |
> |
while (x != null && (xp = x.parent) != null && xp.red && |
940 |
> |
(xpp = xp.parent) != null) { |
941 |
> |
TreeNode xppl = xpp.left; |
942 |
> |
if (xp == xppl) { |
943 |
> |
TreeNode y = xpp.right; |
944 |
> |
if (y != null && y.red) { |
945 |
> |
y.red = false; |
946 |
> |
xp.red = false; |
947 |
> |
xpp.red = true; |
948 |
> |
x = xpp; |
949 |
> |
} |
950 |
> |
else { |
951 |
> |
if (x == xp.right) { |
952 |
> |
rotateLeft(x = xp); |
953 |
> |
xpp = (xp = x.parent) == null ? null : xp.parent; |
954 |
> |
} |
955 |
> |
if (xp != null) { |
956 |
> |
xp.red = false; |
957 |
> |
if (xpp != null) { |
958 |
> |
xpp.red = true; |
959 |
> |
rotateRight(xpp); |
960 |
> |
} |
961 |
> |
} |
962 |
> |
} |
963 |
> |
} |
964 |
> |
else { |
965 |
> |
TreeNode y = xppl; |
966 |
> |
if (y != null && y.red) { |
967 |
> |
y.red = false; |
968 |
> |
xp.red = false; |
969 |
> |
xpp.red = true; |
970 |
> |
x = xpp; |
971 |
> |
} |
972 |
> |
else { |
973 |
> |
if (x == xp.left) { |
974 |
> |
rotateRight(x = xp); |
975 |
> |
xpp = (xp = x.parent) == null ? null : xp.parent; |
976 |
> |
} |
977 |
> |
if (xp != null) { |
978 |
> |
xp.red = false; |
979 |
> |
if (xpp != null) { |
980 |
> |
xpp.red = true; |
981 |
> |
rotateLeft(xpp); |
982 |
> |
} |
983 |
> |
} |
984 |
> |
} |
985 |
> |
} |
986 |
> |
} |
987 |
> |
TreeNode r = root; |
988 |
> |
if (r != null && r.red) |
989 |
> |
r.red = false; |
990 |
> |
} |
991 |
> |
return null; |
992 |
> |
} |
993 |
> |
|
994 |
> |
/** |
995 |
> |
* Removes the given node, that must be present before this |
996 |
> |
* call. This is messier than typical red-black deletion code |
997 |
> |
* because we cannot swap the contents of an interior node |
998 |
> |
* with a leaf successor that is pinned by "next" pointers |
999 |
> |
* that are accessible independently of lock. So instead we |
1000 |
> |
* swap the tree linkages. |
1001 |
> |
*/ |
1002 |
> |
final void deleteTreeNode(TreeNode p) { |
1003 |
> |
TreeNode next = (TreeNode)p.next; // unlink traversal pointers |
1004 |
> |
TreeNode pred = p.prev; |
1005 |
> |
if (pred == null) |
1006 |
> |
first = next; |
1007 |
> |
else |
1008 |
> |
pred.next = next; |
1009 |
> |
if (next != null) |
1010 |
> |
next.prev = pred; |
1011 |
> |
TreeNode replacement; |
1012 |
> |
TreeNode pl = p.left; |
1013 |
> |
TreeNode pr = p.right; |
1014 |
> |
if (pl != null && pr != null) { |
1015 |
> |
TreeNode s = pr, sl; |
1016 |
> |
while ((sl = s.left) != null) // find successor |
1017 |
> |
s = sl; |
1018 |
> |
boolean c = s.red; s.red = p.red; p.red = c; // swap colors |
1019 |
> |
TreeNode sr = s.right; |
1020 |
> |
TreeNode pp = p.parent; |
1021 |
> |
if (s == pr) { // p was s's direct parent |
1022 |
> |
p.parent = s; |
1023 |
> |
s.right = p; |
1024 |
> |
} |
1025 |
> |
else { |
1026 |
> |
TreeNode sp = s.parent; |
1027 |
> |
if ((p.parent = sp) != null) { |
1028 |
> |
if (s == sp.left) |
1029 |
> |
sp.left = p; |
1030 |
> |
else |
1031 |
> |
sp.right = p; |
1032 |
> |
} |
1033 |
> |
if ((s.right = pr) != null) |
1034 |
> |
pr.parent = s; |
1035 |
> |
} |
1036 |
> |
p.left = null; |
1037 |
> |
if ((p.right = sr) != null) |
1038 |
> |
sr.parent = p; |
1039 |
> |
if ((s.left = pl) != null) |
1040 |
> |
pl.parent = s; |
1041 |
> |
if ((s.parent = pp) == null) |
1042 |
> |
root = s; |
1043 |
> |
else if (p == pp.left) |
1044 |
> |
pp.left = s; |
1045 |
> |
else |
1046 |
> |
pp.right = s; |
1047 |
> |
replacement = sr; |
1048 |
> |
} |
1049 |
> |
else |
1050 |
> |
replacement = (pl != null) ? pl : pr; |
1051 |
> |
TreeNode pp = p.parent; |
1052 |
> |
if (replacement == null) { |
1053 |
> |
if (pp == null) { |
1054 |
> |
root = null; |
1055 |
> |
return; |
1056 |
> |
} |
1057 |
> |
replacement = p; |
1058 |
> |
} |
1059 |
> |
else { |
1060 |
> |
replacement.parent = pp; |
1061 |
> |
if (pp == null) |
1062 |
> |
root = replacement; |
1063 |
> |
else if (p == pp.left) |
1064 |
> |
pp.left = replacement; |
1065 |
> |
else |
1066 |
> |
pp.right = replacement; |
1067 |
> |
p.left = p.right = p.parent = null; |
1068 |
> |
} |
1069 |
> |
if (!p.red) { // rebalance, from CLR |
1070 |
> |
TreeNode x = replacement; |
1071 |
> |
while (x != null) { |
1072 |
> |
TreeNode xp, xpl; |
1073 |
> |
if (x.red || (xp = x.parent) == null) { |
1074 |
> |
x.red = false; |
1075 |
> |
break; |
1076 |
> |
} |
1077 |
> |
if (x == (xpl = xp.left)) { |
1078 |
> |
TreeNode sib = xp.right; |
1079 |
> |
if (sib != null && sib.red) { |
1080 |
> |
sib.red = false; |
1081 |
> |
xp.red = true; |
1082 |
> |
rotateLeft(xp); |
1083 |
> |
sib = (xp = x.parent) == null ? null : xp.right; |
1084 |
> |
} |
1085 |
> |
if (sib == null) |
1086 |
> |
x = xp; |
1087 |
> |
else { |
1088 |
> |
TreeNode sl = sib.left, sr = sib.right; |
1089 |
> |
if ((sr == null || !sr.red) && |
1090 |
> |
(sl == null || !sl.red)) { |
1091 |
> |
sib.red = true; |
1092 |
> |
x = xp; |
1093 |
> |
} |
1094 |
> |
else { |
1095 |
> |
if (sr == null || !sr.red) { |
1096 |
> |
if (sl != null) |
1097 |
> |
sl.red = false; |
1098 |
> |
sib.red = true; |
1099 |
> |
rotateRight(sib); |
1100 |
> |
sib = (xp = x.parent) == null ? null : xp.right; |
1101 |
> |
} |
1102 |
> |
if (sib != null) { |
1103 |
> |
sib.red = (xp == null) ? false : xp.red; |
1104 |
> |
if ((sr = sib.right) != null) |
1105 |
> |
sr.red = false; |
1106 |
> |
} |
1107 |
> |
if (xp != null) { |
1108 |
> |
xp.red = false; |
1109 |
> |
rotateLeft(xp); |
1110 |
> |
} |
1111 |
> |
x = root; |
1112 |
> |
} |
1113 |
> |
} |
1114 |
> |
} |
1115 |
> |
else { // symmetric |
1116 |
> |
TreeNode sib = xpl; |
1117 |
> |
if (sib != null && sib.red) { |
1118 |
> |
sib.red = false; |
1119 |
> |
xp.red = true; |
1120 |
> |
rotateRight(xp); |
1121 |
> |
sib = (xp = x.parent) == null ? null : xp.left; |
1122 |
> |
} |
1123 |
> |
if (sib == null) |
1124 |
> |
x = xp; |
1125 |
> |
else { |
1126 |
> |
TreeNode sl = sib.left, sr = sib.right; |
1127 |
> |
if ((sl == null || !sl.red) && |
1128 |
> |
(sr == null || !sr.red)) { |
1129 |
> |
sib.red = true; |
1130 |
> |
x = xp; |
1131 |
> |
} |
1132 |
> |
else { |
1133 |
> |
if (sl == null || !sl.red) { |
1134 |
> |
if (sr != null) |
1135 |
> |
sr.red = false; |
1136 |
> |
sib.red = true; |
1137 |
> |
rotateLeft(sib); |
1138 |
> |
sib = (xp = x.parent) == null ? null : xp.left; |
1139 |
> |
} |
1140 |
> |
if (sib != null) { |
1141 |
> |
sib.red = (xp == null) ? false : xp.red; |
1142 |
> |
if ((sl = sib.left) != null) |
1143 |
> |
sl.red = false; |
1144 |
> |
} |
1145 |
> |
if (xp != null) { |
1146 |
> |
xp.red = false; |
1147 |
> |
rotateRight(xp); |
1148 |
> |
} |
1149 |
> |
x = root; |
1150 |
> |
} |
1151 |
> |
} |
1152 |
> |
} |
1153 |
> |
} |
1154 |
> |
} |
1155 |
> |
if (p == replacement && (pp = p.parent) != null) { |
1156 |
> |
if (p == pp.left) // detach pointers |
1157 |
> |
pp.left = null; |
1158 |
> |
else if (p == pp.right) |
1159 |
> |
pp.right = null; |
1160 |
> |
p.parent = null; |
1161 |
> |
} |
1162 |
> |
} |
1163 |
> |
} |
1164 |
> |
|
1165 |
> |
/* ---------------- Collision reduction methods -------------- */ |
1166 |
> |
|
1167 |
> |
/** |
1168 |
> |
* Spreads higher bits to lower, and also forces top 2 bits to 0. |
1169 |
> |
* Because the table uses power-of-two masking, sets of hashes |
1170 |
> |
* that vary only in bits above the current mask will always |
1171 |
> |
* collide. (Among known examples are sets of Float keys holding |
1172 |
> |
* consecutive whole numbers in small tables.) To counter this, |
1173 |
> |
* we apply a transform that spreads the impact of higher bits |
1174 |
> |
* downward. There is a tradeoff between speed, utility, and |
1175 |
> |
* quality of bit-spreading. Because many common sets of hashes |
1176 |
> |
* are already reasonably distributed across bits (so don't benefit |
1177 |
> |
* from spreading), and because we use trees to handle large sets |
1178 |
> |
* of collisions in bins, we don't need excessively high quality. |
1179 |
|
*/ |
1180 |
|
private static final int spread(int h) { |
1181 |
< |
// Apply base step of MurmurHash; see http://code.google.com/p/smhasher/ |
1182 |
< |
// Despite two multiplies, this is often faster than others |
1183 |
< |
// with comparable bit-spread properties. |
1184 |
< |
h ^= h >>> 16; |
1185 |
< |
h *= 0x85ebca6b; |
1186 |
< |
h ^= h >>> 13; |
1187 |
< |
h *= 0xc2b2ae35; |
1188 |
< |
return ((h >>> 16) ^ h) & HASH_BITS; // mask out top bits |
1181 |
> |
h ^= (h >>> 18) ^ (h >>> 12); |
1182 |
> |
return (h ^ (h >>> 10)) & HASH_BITS; |
1183 |
> |
} |
1184 |
> |
|
1185 |
> |
/** |
1186 |
> |
* Replaces a list bin with a tree bin. Call only when locked. |
1187 |
> |
* Fails to replace if the given key is non-comparable or table |
1188 |
> |
* is, or needs, resizing. |
1189 |
> |
*/ |
1190 |
> |
private final void replaceWithTreeBin(Node[] tab, int index, Object key) { |
1191 |
> |
if ((key instanceof Comparable) && |
1192 |
> |
(tab.length >= MAXIMUM_CAPACITY || counter.sum() < (long)sizeCtl)) { |
1193 |
> |
TreeBin t = new TreeBin(); |
1194 |
> |
for (Node e = tabAt(tab, index); e != null; e = e.next) |
1195 |
> |
t.putTreeNode(e.hash & HASH_BITS, e.key, e.val); |
1196 |
> |
setTabAt(tab, index, new Node(MOVED, t, null, null)); |
1197 |
> |
} |
1198 |
|
} |
1199 |
|
|
1200 |
+ |
/* ---------------- Internal access and update methods -------------- */ |
1201 |
+ |
|
1202 |
|
/** Implementation for get and containsKey */ |
1203 |
|
private final Object internalGet(Object k) { |
1204 |
|
int h = spread(k.hashCode()); |
1205 |
|
retry: for (Node[] tab = table; tab != null;) { |
1206 |
< |
Node e; Object ek, ev; int eh; // locals to read fields once |
1206 |
> |
Node e, p; Object ek, ev; int eh; // locals to read fields once |
1207 |
|
for (e = tabAt(tab, (tab.length - 1) & h); e != null; e = e.next) { |
1208 |
|
if ((eh = e.hash) == MOVED) { |
1209 |
< |
tab = (Node[])e.key; // restart with new table |
1210 |
< |
continue retry; |
1209 |
> |
if ((ek = e.key) instanceof TreeBin) // search TreeBin |
1210 |
> |
return ((TreeBin)ek).getValue(h, k); |
1211 |
> |
else { // restart with new table |
1212 |
> |
tab = (Node[])ek; |
1213 |
> |
continue retry; |
1214 |
> |
} |
1215 |
|
} |
1216 |
< |
if ((eh & HASH_BITS) == h && (ev = e.val) != null && |
1217 |
< |
((ek = e.key) == k || k.equals(ek))) |
1216 |
> |
else if ((eh & HASH_BITS) == h && (ev = e.val) != null && |
1217 |
> |
((ek = e.key) == k || k.equals(ek))) |
1218 |
|
return ev; |
1219 |
|
} |
1220 |
|
break; |
1231 |
|
int h = spread(k.hashCode()); |
1232 |
|
Object oldVal = null; |
1233 |
|
for (Node[] tab = table;;) { |
1234 |
< |
Node f; int i, fh; |
1234 |
> |
Node f; int i, fh; Object fk; |
1235 |
|
if (tab == null || |
1236 |
|
(f = tabAt(tab, i = (tab.length - 1) & h)) == null) |
1237 |
|
break; |
1238 |
< |
else if ((fh = f.hash) == MOVED) |
1239 |
< |
tab = (Node[])f.key; |
1238 |
> |
else if ((fh = f.hash) == MOVED) { |
1239 |
> |
if ((fk = f.key) instanceof TreeBin) { |
1240 |
> |
TreeBin t = (TreeBin)fk; |
1241 |
> |
boolean validated = false; |
1242 |
> |
boolean deleted = false; |
1243 |
> |
t.acquire(0); |
1244 |
> |
try { |
1245 |
> |
if (tabAt(tab, i) == f) { |
1246 |
> |
validated = true; |
1247 |
> |
TreeNode p = t.getTreeNode(h, k, t.root); |
1248 |
> |
if (p != null) { |
1249 |
> |
Object pv = p.val; |
1250 |
> |
if (cv == null || cv == pv || cv.equals(pv)) { |
1251 |
> |
oldVal = pv; |
1252 |
> |
if ((p.val = v) == null) { |
1253 |
> |
deleted = true; |
1254 |
> |
t.deleteTreeNode(p); |
1255 |
> |
} |
1256 |
> |
} |
1257 |
> |
} |
1258 |
> |
} |
1259 |
> |
} finally { |
1260 |
> |
t.release(0); |
1261 |
> |
} |
1262 |
> |
if (validated) { |
1263 |
> |
if (deleted) |
1264 |
> |
counter.add(-1L); |
1265 |
> |
break; |
1266 |
> |
} |
1267 |
> |
} |
1268 |
> |
else |
1269 |
> |
tab = (Node[])fk; |
1270 |
> |
} |
1271 |
|
else if ((fh & HASH_BITS) != h && f.next == null) // precheck |
1272 |
|
break; // rules out possible existence |
1273 |
|
else if ((fh & LOCKED) != 0) { |
1320 |
|
} |
1321 |
|
|
1322 |
|
/* |
1323 |
< |
* Internal versions of the five insertion methods, each a |
1323 |
> |
* Internal versions of the six insertion methods, each a |
1324 |
|
* little more complicated than the last. All have |
1325 |
|
* the same basic structure as the first (internalPut): |
1326 |
|
* 1. If table uninitialized, create |
1327 |
|
* 2. If bin empty, try to CAS new node |
1328 |
|
* 3. If bin stale, use new table |
1329 |
< |
* 4. Lock and validate; if valid, scan and add or update |
1329 |
> |
* 4. if bin converted to TreeBin, validate and relay to TreeBin methods |
1330 |
> |
* 5. Lock and validate; if valid, scan and add or update |
1331 |
|
* |
1332 |
|
* The others interweave other checks and/or alternative actions: |
1333 |
|
* * Plain put checks for and performs resize after insertion. |
1338 |
|
* returns from function call. |
1339 |
|
* * compute uses the same function-call mechanics, but without |
1340 |
|
* the prescans |
1341 |
+ |
* * merge acts as putIfAbsent in the absent case, but invokes the |
1342 |
+ |
* update function if present |
1343 |
|
* * putAll attempts to pre-allocate enough table space |
1344 |
|
* and more lazily performs count updates and checks. |
1345 |
|
* |
1350 |
|
/** Implementation for put */ |
1351 |
|
private final Object internalPut(Object k, Object v) { |
1352 |
|
int h = spread(k.hashCode()); |
1353 |
< |
boolean checkSize = false; |
1353 |
> |
int count = 0; |
1354 |
|
for (Node[] tab = table;;) { |
1355 |
< |
int i; Node f; int fh; |
1355 |
> |
int i; Node f; int fh; Object fk; |
1356 |
|
if (tab == null) |
1357 |
|
tab = initTable(); |
1358 |
|
else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) { |
1359 |
|
if (casTabAt(tab, i, null, new Node(h, k, v, null))) |
1360 |
|
break; // no lock when adding to empty bin |
1361 |
|
} |
1362 |
< |
else if ((fh = f.hash) == MOVED) |
1363 |
< |
tab = (Node[])f.key; |
1362 |
> |
else if ((fh = f.hash) == MOVED) { |
1363 |
> |
if ((fk = f.key) instanceof TreeBin) { |
1364 |
> |
TreeBin t = (TreeBin)fk; |
1365 |
> |
Object oldVal = null; |
1366 |
> |
t.acquire(0); |
1367 |
> |
try { |
1368 |
> |
if (tabAt(tab, i) == f) { |
1369 |
> |
count = 2; |
1370 |
> |
TreeNode p = t.putTreeNode(h, k, v); |
1371 |
> |
if (p != null) { |
1372 |
> |
oldVal = p.val; |
1373 |
> |
p.val = v; |
1374 |
> |
} |
1375 |
> |
} |
1376 |
> |
} finally { |
1377 |
> |
t.release(0); |
1378 |
> |
} |
1379 |
> |
if (count != 0) { |
1380 |
> |
if (oldVal != null) |
1381 |
> |
return oldVal; |
1382 |
> |
break; |
1383 |
> |
} |
1384 |
> |
} |
1385 |
> |
else |
1386 |
> |
tab = (Node[])fk; |
1387 |
> |
} |
1388 |
|
else if ((fh & LOCKED) != 0) { |
1389 |
|
checkForResize(); |
1390 |
|
f.tryAwaitLock(tab, i); |
1391 |
|
} |
1392 |
|
else if (f.casHash(fh, fh | LOCKED)) { |
1393 |
|
Object oldVal = null; |
656 |
– |
boolean validated = false; |
1394 |
|
try { // needed in case equals() throws |
1395 |
|
if (tabAt(tab, i) == f) { |
1396 |
< |
validated = true; // retry if 1st already deleted |
1397 |
< |
for (Node e = f;;) { |
1396 |
> |
count = 1; |
1397 |
> |
for (Node e = f;; ++count) { |
1398 |
|
Object ek, ev; |
1399 |
|
if ((e.hash & HASH_BITS) == h && |
1400 |
|
(ev = e.val) != null && |
1406 |
|
Node last = e; |
1407 |
|
if ((e = e.next) == null) { |
1408 |
|
last.next = new Node(h, k, v, null); |
1409 |
< |
if (last != f || tab.length <= 64) |
1410 |
< |
checkSize = true; |
1409 |
> |
if (count >= TREE_THRESHOLD) |
1410 |
> |
replaceWithTreeBin(tab, i, k); |
1411 |
|
break; |
1412 |
|
} |
1413 |
|
} |
1418 |
|
synchronized (f) { f.notifyAll(); }; |
1419 |
|
} |
1420 |
|
} |
1421 |
< |
if (validated) { |
1421 |
> |
if (count != 0) { |
1422 |
|
if (oldVal != null) |
1423 |
|
return oldVal; |
1424 |
+ |
if (tab.length <= 64) |
1425 |
+ |
count = 2; |
1426 |
|
break; |
1427 |
|
} |
1428 |
|
} |
1429 |
|
} |
1430 |
|
counter.add(1L); |
1431 |
< |
if (checkSize) |
1431 |
> |
if (count > 1) |
1432 |
|
checkForResize(); |
1433 |
|
return null; |
1434 |
|
} |
1436 |
|
/** Implementation for putIfAbsent */ |
1437 |
|
private final Object internalPutIfAbsent(Object k, Object v) { |
1438 |
|
int h = spread(k.hashCode()); |
1439 |
+ |
int count = 0; |
1440 |
|
for (Node[] tab = table;;) { |
1441 |
|
int i; Node f; int fh; Object fk, fv; |
1442 |
|
if (tab == null) |
1445 |
|
if (casTabAt(tab, i, null, new Node(h, k, v, null))) |
1446 |
|
break; |
1447 |
|
} |
1448 |
< |
else if ((fh = f.hash) == MOVED) |
1449 |
< |
tab = (Node[])f.key; |
1448 |
> |
else if ((fh = f.hash) == MOVED) { |
1449 |
> |
if ((fk = f.key) instanceof TreeBin) { |
1450 |
> |
TreeBin t = (TreeBin)fk; |
1451 |
> |
Object oldVal = null; |
1452 |
> |
t.acquire(0); |
1453 |
> |
try { |
1454 |
> |
if (tabAt(tab, i) == f) { |
1455 |
> |
count = 2; |
1456 |
> |
TreeNode p = t.putTreeNode(h, k, v); |
1457 |
> |
if (p != null) |
1458 |
> |
oldVal = p.val; |
1459 |
> |
} |
1460 |
> |
} finally { |
1461 |
> |
t.release(0); |
1462 |
> |
} |
1463 |
> |
if (count != 0) { |
1464 |
> |
if (oldVal != null) |
1465 |
> |
return oldVal; |
1466 |
> |
break; |
1467 |
> |
} |
1468 |
> |
} |
1469 |
> |
else |
1470 |
> |
tab = (Node[])fk; |
1471 |
> |
} |
1472 |
|
else if ((fh & HASH_BITS) == h && (fv = f.val) != null && |
1473 |
|
((fk = f.key) == k || k.equals(fk))) |
1474 |
|
return fv; |
1492 |
|
} |
1493 |
|
else if (tabAt(tab, i) == f && f.casHash(fh, fh | LOCKED)) { |
1494 |
|
Object oldVal = null; |
733 |
– |
boolean validated = false; |
1495 |
|
try { |
1496 |
|
if (tabAt(tab, i) == f) { |
1497 |
< |
validated = true; |
1498 |
< |
for (Node e = f;;) { |
1497 |
> |
count = 1; |
1498 |
> |
for (Node e = f;; ++count) { |
1499 |
|
Object ek, ev; |
1500 |
|
if ((e.hash & HASH_BITS) == h && |
1501 |
|
(ev = e.val) != null && |
1506 |
|
Node last = e; |
1507 |
|
if ((e = e.next) == null) { |
1508 |
|
last.next = new Node(h, k, v, null); |
1509 |
+ |
if (count >= TREE_THRESHOLD) |
1510 |
+ |
replaceWithTreeBin(tab, i, k); |
1511 |
|
break; |
1512 |
|
} |
1513 |
|
} |
1518 |
|
synchronized (f) { f.notifyAll(); }; |
1519 |
|
} |
1520 |
|
} |
1521 |
< |
if (validated) { |
1521 |
> |
if (count != 0) { |
1522 |
|
if (oldVal != null) |
1523 |
|
return oldVal; |
1524 |
+ |
if (tab.length <= 64) |
1525 |
+ |
count = 2; |
1526 |
|
break; |
1527 |
|
} |
1528 |
|
} |
1529 |
|
} |
1530 |
|
} |
1531 |
|
counter.add(1L); |
1532 |
+ |
if (count > 1) |
1533 |
+ |
checkForResize(); |
1534 |
|
return null; |
1535 |
|
} |
1536 |
|
|
1537 |
|
/** Implementation for computeIfAbsent */ |
1538 |
|
private final Object internalComputeIfAbsent(K k, |
1539 |
< |
MappingFunction<? super K, ?> mf) { |
1539 |
> |
Fun<? super K, ?> mf) { |
1540 |
|
int h = spread(k.hashCode()); |
1541 |
|
Object val = null; |
1542 |
+ |
int count = 0; |
1543 |
|
for (Node[] tab = table;;) { |
1544 |
|
Node f; int i, fh; Object fk, fv; |
1545 |
|
if (tab == null) |
1546 |
|
tab = initTable(); |
1547 |
|
else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) { |
1548 |
|
Node node = new Node(fh = h | LOCKED, k, null, null); |
781 |
– |
boolean validated = false; |
1549 |
|
if (casTabAt(tab, i, null, node)) { |
1550 |
< |
validated = true; |
1550 |
> |
count = 1; |
1551 |
|
try { |
1552 |
< |
if ((val = mf.map(k)) != null) |
1552 |
> |
if ((val = mf.apply(k)) != null) |
1553 |
|
node.val = val; |
1554 |
|
} finally { |
1555 |
|
if (val == null) |
1560 |
|
} |
1561 |
|
} |
1562 |
|
} |
1563 |
< |
if (validated) |
1563 |
> |
if (count != 0) |
1564 |
|
break; |
1565 |
|
} |
1566 |
< |
else if ((fh = f.hash) == MOVED) |
1567 |
< |
tab = (Node[])f.key; |
1566 |
> |
else if ((fh = f.hash) == MOVED) { |
1567 |
> |
if ((fk = f.key) instanceof TreeBin) { |
1568 |
> |
TreeBin t = (TreeBin)fk; |
1569 |
> |
boolean added = false; |
1570 |
> |
t.acquire(0); |
1571 |
> |
try { |
1572 |
> |
if (tabAt(tab, i) == f) { |
1573 |
> |
count = 1; |
1574 |
> |
TreeNode p = t.getTreeNode(h, k, t.root); |
1575 |
> |
if (p != null) |
1576 |
> |
val = p.val; |
1577 |
> |
else if ((val = mf.apply(k)) != null) { |
1578 |
> |
added = true; |
1579 |
> |
count = 2; |
1580 |
> |
t.putTreeNode(h, k, val); |
1581 |
> |
} |
1582 |
> |
} |
1583 |
> |
} finally { |
1584 |
> |
t.release(0); |
1585 |
> |
} |
1586 |
> |
if (count != 0) { |
1587 |
> |
if (!added) |
1588 |
> |
return val; |
1589 |
> |
break; |
1590 |
> |
} |
1591 |
> |
} |
1592 |
> |
else |
1593 |
> |
tab = (Node[])fk; |
1594 |
> |
} |
1595 |
|
else if ((fh & HASH_BITS) == h && (fv = f.val) != null && |
1596 |
|
((fk = f.key) == k || k.equals(fk))) |
1597 |
|
return fv; |
1614 |
|
f.tryAwaitLock(tab, i); |
1615 |
|
} |
1616 |
|
else if (tabAt(tab, i) == f && f.casHash(fh, fh | LOCKED)) { |
1617 |
< |
boolean validated = false; |
1617 |
> |
boolean added = false; |
1618 |
|
try { |
1619 |
|
if (tabAt(tab, i) == f) { |
1620 |
< |
validated = true; |
1621 |
< |
for (Node e = f;;) { |
1620 |
> |
count = 1; |
1621 |
> |
for (Node e = f;; ++count) { |
1622 |
|
Object ek, ev; |
1623 |
|
if ((e.hash & HASH_BITS) == h && |
1624 |
|
(ev = e.val) != null && |
1628 |
|
} |
1629 |
|
Node last = e; |
1630 |
|
if ((e = e.next) == null) { |
1631 |
< |
if ((val = mf.map(k)) != null) |
1631 |
> |
if ((val = mf.apply(k)) != null) { |
1632 |
> |
added = true; |
1633 |
|
last.next = new Node(h, k, val, null); |
1634 |
+ |
if (count >= TREE_THRESHOLD) |
1635 |
+ |
replaceWithTreeBin(tab, i, k); |
1636 |
+ |
} |
1637 |
|
break; |
1638 |
|
} |
1639 |
|
} |
1644 |
|
synchronized (f) { f.notifyAll(); }; |
1645 |
|
} |
1646 |
|
} |
1647 |
< |
if (validated) |
1647 |
> |
if (count != 0) { |
1648 |
> |
if (!added) |
1649 |
> |
return val; |
1650 |
> |
if (tab.length <= 64) |
1651 |
> |
count = 2; |
1652 |
|
break; |
1653 |
+ |
} |
1654 |
|
} |
1655 |
|
} |
1656 |
|
} |
1657 |
< |
if (val == null) |
1658 |
< |
throw new NullPointerException(); |
1659 |
< |
counter.add(1L); |
1657 |
> |
if (val != null) { |
1658 |
> |
counter.add(1L); |
1659 |
> |
if (count > 1) |
1660 |
> |
checkForResize(); |
1661 |
> |
} |
1662 |
|
return val; |
1663 |
|
} |
1664 |
|
|
1665 |
|
/** Implementation for compute */ |
1666 |
< |
@SuppressWarnings("unchecked") |
1667 |
< |
private final Object internalCompute(K k, |
863 |
< |
RemappingFunction<? super K, V> mf) { |
1666 |
> |
@SuppressWarnings("unchecked") private final Object internalCompute |
1667 |
> |
(K k, boolean onlyIfPresent, BiFun<? super K, ? super V, ? extends V> mf) { |
1668 |
|
int h = spread(k.hashCode()); |
1669 |
|
Object val = null; |
1670 |
< |
boolean added = false; |
1671 |
< |
boolean checkSize = false; |
1670 |
> |
int delta = 0; |
1671 |
> |
int count = 0; |
1672 |
|
for (Node[] tab = table;;) { |
1673 |
< |
Node f; int i, fh; |
1673 |
> |
Node f; int i, fh; Object fk; |
1674 |
|
if (tab == null) |
1675 |
|
tab = initTable(); |
1676 |
|
else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) { |
1677 |
+ |
if (onlyIfPresent) |
1678 |
+ |
break; |
1679 |
|
Node node = new Node(fh = h | LOCKED, k, null, null); |
874 |
– |
boolean validated = false; |
1680 |
|
if (casTabAt(tab, i, null, node)) { |
876 |
– |
validated = true; |
1681 |
|
try { |
1682 |
< |
if ((val = mf.remap(k, null)) != null) { |
1682 |
> |
count = 1; |
1683 |
> |
if ((val = mf.apply(k, null)) != null) { |
1684 |
|
node.val = val; |
1685 |
< |
added = true; |
1685 |
> |
delta = 1; |
1686 |
|
} |
1687 |
|
} finally { |
1688 |
< |
if (!added) |
1688 |
> |
if (delta == 0) |
1689 |
|
setTabAt(tab, i, null); |
1690 |
|
if (!node.casHash(fh, h)) { |
1691 |
|
node.hash = h; |
1693 |
|
} |
1694 |
|
} |
1695 |
|
} |
1696 |
< |
if (validated) |
1696 |
> |
if (count != 0) |
1697 |
|
break; |
1698 |
|
} |
1699 |
< |
else if ((fh = f.hash) == MOVED) |
1700 |
< |
tab = (Node[])f.key; |
1699 |
> |
else if ((fh = f.hash) == MOVED) { |
1700 |
> |
if ((fk = f.key) instanceof TreeBin) { |
1701 |
> |
TreeBin t = (TreeBin)fk; |
1702 |
> |
t.acquire(0); |
1703 |
> |
try { |
1704 |
> |
if (tabAt(tab, i) == f) { |
1705 |
> |
count = 1; |
1706 |
> |
TreeNode p = t.getTreeNode(h, k, t.root); |
1707 |
> |
Object pv = (p == null) ? null : p.val; |
1708 |
> |
if ((val = mf.apply(k, (V)pv)) != null) { |
1709 |
> |
if (p != null) |
1710 |
> |
p.val = val; |
1711 |
> |
else { |
1712 |
> |
count = 2; |
1713 |
> |
delta = 1; |
1714 |
> |
t.putTreeNode(h, k, val); |
1715 |
> |
} |
1716 |
> |
} |
1717 |
> |
else if (p != null) { |
1718 |
> |
delta = -1; |
1719 |
> |
t.deleteTreeNode(p); |
1720 |
> |
} |
1721 |
> |
} |
1722 |
> |
} finally { |
1723 |
> |
t.release(0); |
1724 |
> |
} |
1725 |
> |
if (count != 0) |
1726 |
> |
break; |
1727 |
> |
} |
1728 |
> |
else |
1729 |
> |
tab = (Node[])fk; |
1730 |
> |
} |
1731 |
|
else if ((fh & LOCKED) != 0) { |
1732 |
|
checkForResize(); |
1733 |
|
f.tryAwaitLock(tab, i); |
1734 |
|
} |
1735 |
|
else if (f.casHash(fh, fh | LOCKED)) { |
901 |
– |
boolean validated = false; |
1736 |
|
try { |
1737 |
|
if (tabAt(tab, i) == f) { |
1738 |
< |
validated = true; |
1739 |
< |
for (Node e = f;;) { |
1738 |
> |
count = 1; |
1739 |
> |
for (Node e = f, pred = null;; ++count) { |
1740 |
|
Object ek, ev; |
1741 |
|
if ((e.hash & HASH_BITS) == h && |
1742 |
|
(ev = e.val) != null && |
1743 |
|
((ek = e.key) == k || k.equals(ek))) { |
1744 |
< |
val = mf.remap(k, (V)ev); |
1744 |
> |
val = mf.apply(k, (V)ev); |
1745 |
|
if (val != null) |
1746 |
|
e.val = val; |
1747 |
+ |
else { |
1748 |
+ |
delta = -1; |
1749 |
+ |
Node en = e.next; |
1750 |
+ |
if (pred != null) |
1751 |
+ |
pred.next = en; |
1752 |
+ |
else |
1753 |
+ |
setTabAt(tab, i, en); |
1754 |
+ |
} |
1755 |
|
break; |
1756 |
|
} |
1757 |
< |
Node last = e; |
1757 |
> |
pred = e; |
1758 |
|
if ((e = e.next) == null) { |
1759 |
< |
if ((val = mf.remap(k, null)) != null) { |
1760 |
< |
last.next = new Node(h, k, val, null); |
1761 |
< |
added = true; |
1762 |
< |
if (last != f || tab.length <= 64) |
1763 |
< |
checkSize = true; |
1759 |
> |
if (!onlyIfPresent && (val = mf.apply(k, null)) != null) { |
1760 |
> |
pred.next = new Node(h, k, val, null); |
1761 |
> |
delta = 1; |
1762 |
> |
if (count >= TREE_THRESHOLD) |
1763 |
> |
replaceWithTreeBin(tab, i, k); |
1764 |
|
} |
1765 |
|
break; |
1766 |
|
} |
1772 |
|
synchronized (f) { f.notifyAll(); }; |
1773 |
|
} |
1774 |
|
} |
1775 |
< |
if (validated) |
1775 |
> |
if (count != 0) { |
1776 |
> |
if (tab.length <= 64) |
1777 |
> |
count = 2; |
1778 |
|
break; |
1779 |
+ |
} |
1780 |
|
} |
1781 |
|
} |
1782 |
< |
if (val == null) |
1783 |
< |
throw new NullPointerException(); |
1784 |
< |
if (added) { |
1785 |
< |
counter.add(1L); |
1786 |
< |
if (checkSize) |
1782 |
> |
if (delta != 0) { |
1783 |
> |
counter.add((long)delta); |
1784 |
> |
if (count > 1) |
1785 |
> |
checkForResize(); |
1786 |
> |
} |
1787 |
> |
return val; |
1788 |
> |
} |
1789 |
> |
|
1790 |
> |
/** Implementation for merge */ |
1791 |
> |
@SuppressWarnings("unchecked") private final Object internalMerge |
1792 |
> |
(K k, V v, BiFun<? super V, ? super V, ? extends V> mf) { |
1793 |
> |
int h = spread(k.hashCode()); |
1794 |
> |
Object val = null; |
1795 |
> |
int delta = 0; |
1796 |
> |
int count = 0; |
1797 |
> |
for (Node[] tab = table;;) { |
1798 |
> |
int i; Node f; int fh; Object fk, fv; |
1799 |
> |
if (tab == null) |
1800 |
> |
tab = initTable(); |
1801 |
> |
else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null) { |
1802 |
> |
if (casTabAt(tab, i, null, new Node(h, k, v, null))) { |
1803 |
> |
delta = 1; |
1804 |
> |
val = v; |
1805 |
> |
break; |
1806 |
> |
} |
1807 |
> |
} |
1808 |
> |
else if ((fh = f.hash) == MOVED) { |
1809 |
> |
if ((fk = f.key) instanceof TreeBin) { |
1810 |
> |
TreeBin t = (TreeBin)fk; |
1811 |
> |
t.acquire(0); |
1812 |
> |
try { |
1813 |
> |
if (tabAt(tab, i) == f) { |
1814 |
> |
count = 1; |
1815 |
> |
TreeNode p = t.getTreeNode(h, k, t.root); |
1816 |
> |
val = (p == null) ? v : mf.apply((V)p.val, v); |
1817 |
> |
if (val != null) { |
1818 |
> |
if (p != null) |
1819 |
> |
p.val = val; |
1820 |
> |
else { |
1821 |
> |
count = 2; |
1822 |
> |
delta = 1; |
1823 |
> |
t.putTreeNode(h, k, val); |
1824 |
> |
} |
1825 |
> |
} |
1826 |
> |
else if (p != null) { |
1827 |
> |
delta = -1; |
1828 |
> |
t.deleteTreeNode(p); |
1829 |
> |
} |
1830 |
> |
} |
1831 |
> |
} finally { |
1832 |
> |
t.release(0); |
1833 |
> |
} |
1834 |
> |
if (count != 0) |
1835 |
> |
break; |
1836 |
> |
} |
1837 |
> |
else |
1838 |
> |
tab = (Node[])fk; |
1839 |
> |
} |
1840 |
> |
else if ((fh & LOCKED) != 0) { |
1841 |
> |
checkForResize(); |
1842 |
> |
f.tryAwaitLock(tab, i); |
1843 |
> |
} |
1844 |
> |
else if (f.casHash(fh, fh | LOCKED)) { |
1845 |
> |
try { |
1846 |
> |
if (tabAt(tab, i) == f) { |
1847 |
> |
count = 1; |
1848 |
> |
for (Node e = f, pred = null;; ++count) { |
1849 |
> |
Object ek, ev; |
1850 |
> |
if ((e.hash & HASH_BITS) == h && |
1851 |
> |
(ev = e.val) != null && |
1852 |
> |
((ek = e.key) == k || k.equals(ek))) { |
1853 |
> |
val = mf.apply(v, (V)ev); |
1854 |
> |
if (val != null) |
1855 |
> |
e.val = val; |
1856 |
> |
else { |
1857 |
> |
delta = -1; |
1858 |
> |
Node en = e.next; |
1859 |
> |
if (pred != null) |
1860 |
> |
pred.next = en; |
1861 |
> |
else |
1862 |
> |
setTabAt(tab, i, en); |
1863 |
> |
} |
1864 |
> |
break; |
1865 |
> |
} |
1866 |
> |
pred = e; |
1867 |
> |
if ((e = e.next) == null) { |
1868 |
> |
val = v; |
1869 |
> |
pred.next = new Node(h, k, val, null); |
1870 |
> |
delta = 1; |
1871 |
> |
if (count >= TREE_THRESHOLD) |
1872 |
> |
replaceWithTreeBin(tab, i, k); |
1873 |
> |
break; |
1874 |
> |
} |
1875 |
> |
} |
1876 |
> |
} |
1877 |
> |
} finally { |
1878 |
> |
if (!f.casHash(fh | LOCKED, fh)) { |
1879 |
> |
f.hash = fh; |
1880 |
> |
synchronized (f) { f.notifyAll(); }; |
1881 |
> |
} |
1882 |
> |
} |
1883 |
> |
if (count != 0) { |
1884 |
> |
if (tab.length <= 64) |
1885 |
> |
count = 2; |
1886 |
> |
break; |
1887 |
> |
} |
1888 |
> |
} |
1889 |
> |
} |
1890 |
> |
if (delta != 0) { |
1891 |
> |
counter.add((long)delta); |
1892 |
> |
if (count > 1) |
1893 |
|
checkForResize(); |
1894 |
|
} |
1895 |
|
return val; |
1910 |
|
} |
1911 |
|
int h = spread(k.hashCode()); |
1912 |
|
for (Node[] tab = table;;) { |
1913 |
< |
int i; Node f; int fh; |
1913 |
> |
int i; Node f; int fh; Object fk; |
1914 |
|
if (tab == null) |
1915 |
|
tab = initTable(); |
1916 |
|
else if ((f = tabAt(tab, i = (tab.length - 1) & h)) == null){ |
1919 |
|
break; |
1920 |
|
} |
1921 |
|
} |
1922 |
< |
else if ((fh = f.hash) == MOVED) |
1923 |
< |
tab = (Node[])f.key; |
1922 |
> |
else if ((fh = f.hash) == MOVED) { |
1923 |
> |
if ((fk = f.key) instanceof TreeBin) { |
1924 |
> |
TreeBin t = (TreeBin)fk; |
1925 |
> |
boolean validated = false; |
1926 |
> |
t.acquire(0); |
1927 |
> |
try { |
1928 |
> |
if (tabAt(tab, i) == f) { |
1929 |
> |
validated = true; |
1930 |
> |
TreeNode p = t.getTreeNode(h, k, t.root); |
1931 |
> |
if (p != null) |
1932 |
> |
p.val = v; |
1933 |
> |
else { |
1934 |
> |
t.putTreeNode(h, k, v); |
1935 |
> |
++delta; |
1936 |
> |
} |
1937 |
> |
} |
1938 |
> |
} finally { |
1939 |
> |
t.release(0); |
1940 |
> |
} |
1941 |
> |
if (validated) |
1942 |
> |
break; |
1943 |
> |
} |
1944 |
> |
else |
1945 |
> |
tab = (Node[])fk; |
1946 |
> |
} |
1947 |
|
else if ((fh & LOCKED) != 0) { |
1948 |
|
counter.add(delta); |
1949 |
|
delta = 0L; |
1951 |
|
f.tryAwaitLock(tab, i); |
1952 |
|
} |
1953 |
|
else if (f.casHash(fh, fh | LOCKED)) { |
1954 |
< |
boolean validated = false; |
981 |
< |
boolean tooLong = false; |
1954 |
> |
int count = 0; |
1955 |
|
try { |
1956 |
|
if (tabAt(tab, i) == f) { |
1957 |
< |
validated = true; |
1958 |
< |
for (Node e = f;;) { |
1957 |
> |
count = 1; |
1958 |
> |
for (Node e = f;; ++count) { |
1959 |
|
Object ek, ev; |
1960 |
|
if ((e.hash & HASH_BITS) == h && |
1961 |
|
(ev = e.val) != null && |
1967 |
|
if ((e = e.next) == null) { |
1968 |
|
++delta; |
1969 |
|
last.next = new Node(h, k, v, null); |
1970 |
+ |
if (count >= TREE_THRESHOLD) |
1971 |
+ |
replaceWithTreeBin(tab, i, k); |
1972 |
|
break; |
1973 |
|
} |
999 |
– |
tooLong = true; |
1974 |
|
} |
1975 |
|
} |
1976 |
|
} finally { |
1979 |
|
synchronized (f) { f.notifyAll(); }; |
1980 |
|
} |
1981 |
|
} |
1982 |
< |
if (validated) { |
1983 |
< |
if (tooLong) { |
1982 |
> |
if (count != 0) { |
1983 |
> |
if (count > 1) { |
1984 |
|
counter.add(delta); |
1985 |
|
delta = 0L; |
1986 |
|
checkForResize(); |
2119 |
|
for (int i = bin;;) { // start upwards sweep |
2120 |
|
int fh; Node f; |
2121 |
|
if ((f = tabAt(tab, i)) == null) { |
2122 |
< |
if (bin >= 0) { // no lock needed (or available) |
2122 |
> |
if (bin >= 0) { // Unbuffered; no lock needed (or available) |
2123 |
|
if (!casTabAt(tab, i, f, fwd)) |
2124 |
|
continue; |
2125 |
|
} |
2136 |
|
} |
2137 |
|
} |
2138 |
|
} |
2139 |
< |
else if (((fh = f.hash) & LOCKED) == 0 && f.casHash(fh, fh|LOCKED)) { |
2139 |
> |
else if ((fh = f.hash) == MOVED) { |
2140 |
> |
Object fk = f.key; |
2141 |
> |
if (fk instanceof TreeBin) { |
2142 |
> |
TreeBin t = (TreeBin)fk; |
2143 |
> |
boolean validated = false; |
2144 |
> |
t.acquire(0); |
2145 |
> |
try { |
2146 |
> |
if (tabAt(tab, i) == f) { |
2147 |
> |
validated = true; |
2148 |
> |
splitTreeBin(nextTab, i, t); |
2149 |
> |
setTabAt(tab, i, fwd); |
2150 |
> |
} |
2151 |
> |
} finally { |
2152 |
> |
t.release(0); |
2153 |
> |
} |
2154 |
> |
if (!validated) |
2155 |
> |
continue; |
2156 |
> |
} |
2157 |
> |
} |
2158 |
> |
else if ((fh & LOCKED) == 0 && f.casHash(fh, fh|LOCKED)) { |
2159 |
|
boolean validated = false; |
2160 |
|
try { // split to lo and hi lists; copying as needed |
2161 |
|
if (tabAt(tab, i) == f) { |
2162 |
|
validated = true; |
2163 |
< |
Node e = f, lastRun = f; |
1171 |
< |
Node lo = null, hi = null; |
1172 |
< |
int runBit = e.hash & n; |
1173 |
< |
for (Node p = e.next; p != null; p = p.next) { |
1174 |
< |
int b = p.hash & n; |
1175 |
< |
if (b != runBit) { |
1176 |
< |
runBit = b; |
1177 |
< |
lastRun = p; |
1178 |
< |
} |
1179 |
< |
} |
1180 |
< |
if (runBit == 0) |
1181 |
< |
lo = lastRun; |
1182 |
< |
else |
1183 |
< |
hi = lastRun; |
1184 |
< |
for (Node p = e; p != lastRun; p = p.next) { |
1185 |
< |
int ph = p.hash & HASH_BITS; |
1186 |
< |
Object pk = p.key, pv = p.val; |
1187 |
< |
if ((ph & n) == 0) |
1188 |
< |
lo = new Node(ph, pk, pv, lo); |
1189 |
< |
else |
1190 |
< |
hi = new Node(ph, pk, pv, hi); |
1191 |
< |
} |
1192 |
< |
setTabAt(nextTab, i, lo); |
1193 |
< |
setTabAt(nextTab, i + n, hi); |
2163 |
> |
splitBin(nextTab, i, f); |
2164 |
|
setTabAt(tab, i, fwd); |
2165 |
|
} |
2166 |
|
} finally { |
2206 |
|
} |
2207 |
|
|
2208 |
|
/** |
2209 |
+ |
* Splits a normal bin with list headed by e into lo and hi parts; |
2210 |
+ |
* installs in given table. |
2211 |
+ |
*/ |
2212 |
+ |
private static void splitBin(Node[] nextTab, int i, Node e) { |
2213 |
+ |
int bit = nextTab.length >>> 1; // bit to split on |
2214 |
+ |
int runBit = e.hash & bit; |
2215 |
+ |
Node lastRun = e, lo = null, hi = null; |
2216 |
+ |
for (Node p = e.next; p != null; p = p.next) { |
2217 |
+ |
int b = p.hash & bit; |
2218 |
+ |
if (b != runBit) { |
2219 |
+ |
runBit = b; |
2220 |
+ |
lastRun = p; |
2221 |
+ |
} |
2222 |
+ |
} |
2223 |
+ |
if (runBit == 0) |
2224 |
+ |
lo = lastRun; |
2225 |
+ |
else |
2226 |
+ |
hi = lastRun; |
2227 |
+ |
for (Node p = e; p != lastRun; p = p.next) { |
2228 |
+ |
int ph = p.hash & HASH_BITS; |
2229 |
+ |
Object pk = p.key, pv = p.val; |
2230 |
+ |
if ((ph & bit) == 0) |
2231 |
+ |
lo = new Node(ph, pk, pv, lo); |
2232 |
+ |
else |
2233 |
+ |
hi = new Node(ph, pk, pv, hi); |
2234 |
+ |
} |
2235 |
+ |
setTabAt(nextTab, i, lo); |
2236 |
+ |
setTabAt(nextTab, i + bit, hi); |
2237 |
+ |
} |
2238 |
+ |
|
2239 |
+ |
/** |
2240 |
+ |
* Splits a tree bin into lo and hi parts; installs in given table. |
2241 |
+ |
*/ |
2242 |
+ |
private static void splitTreeBin(Node[] nextTab, int i, TreeBin t) { |
2243 |
+ |
int bit = nextTab.length >>> 1; |
2244 |
+ |
TreeBin lt = new TreeBin(); |
2245 |
+ |
TreeBin ht = new TreeBin(); |
2246 |
+ |
int lc = 0, hc = 0; |
2247 |
+ |
for (Node e = t.first; e != null; e = e.next) { |
2248 |
+ |
int h = e.hash & HASH_BITS; |
2249 |
+ |
Object k = e.key, v = e.val; |
2250 |
+ |
if ((h & bit) == 0) { |
2251 |
+ |
++lc; |
2252 |
+ |
lt.putTreeNode(h, k, v); |
2253 |
+ |
} |
2254 |
+ |
else { |
2255 |
+ |
++hc; |
2256 |
+ |
ht.putTreeNode(h, k, v); |
2257 |
+ |
} |
2258 |
+ |
} |
2259 |
+ |
Node ln, hn; // throw away trees if too small |
2260 |
+ |
if (lc <= (TREE_THRESHOLD >>> 1)) { |
2261 |
+ |
ln = null; |
2262 |
+ |
for (Node p = lt.first; p != null; p = p.next) |
2263 |
+ |
ln = new Node(p.hash, p.key, p.val, ln); |
2264 |
+ |
} |
2265 |
+ |
else |
2266 |
+ |
ln = new Node(MOVED, lt, null, null); |
2267 |
+ |
setTabAt(nextTab, i, ln); |
2268 |
+ |
if (hc <= (TREE_THRESHOLD >>> 1)) { |
2269 |
+ |
hn = null; |
2270 |
+ |
for (Node p = ht.first; p != null; p = p.next) |
2271 |
+ |
hn = new Node(p.hash, p.key, p.val, hn); |
2272 |
+ |
} |
2273 |
+ |
else |
2274 |
+ |
hn = new Node(MOVED, ht, null, null); |
2275 |
+ |
setTabAt(nextTab, i + bit, hn); |
2276 |
+ |
} |
2277 |
+ |
|
2278 |
+ |
/** |
2279 |
|
* Implementation for clear. Steps through each bin, removing all |
2280 |
|
* nodes. |
2281 |
|
*/ |
2284 |
|
int i = 0; |
2285 |
|
Node[] tab = table; |
2286 |
|
while (tab != null && i < tab.length) { |
2287 |
< |
int fh; |
2287 |
> |
int fh; Object fk; |
2288 |
|
Node f = tabAt(tab, i); |
2289 |
|
if (f == null) |
2290 |
|
++i; |
2291 |
< |
else if ((fh = f.hash) == MOVED) |
2292 |
< |
tab = (Node[])f.key; |
2291 |
> |
else if ((fh = f.hash) == MOVED) { |
2292 |
> |
if ((fk = f.key) instanceof TreeBin) { |
2293 |
> |
TreeBin t = (TreeBin)fk; |
2294 |
> |
t.acquire(0); |
2295 |
> |
try { |
2296 |
> |
if (tabAt(tab, i) == f) { |
2297 |
> |
for (Node p = t.first; p != null; p = p.next) { |
2298 |
> |
if (p.val != null) { // (currently always true) |
2299 |
> |
p.val = null; |
2300 |
> |
--delta; |
2301 |
> |
} |
2302 |
> |
} |
2303 |
> |
t.first = null; |
2304 |
> |
t.root = null; |
2305 |
> |
++i; |
2306 |
> |
} |
2307 |
> |
} finally { |
2308 |
> |
t.release(0); |
2309 |
> |
} |
2310 |
> |
} |
2311 |
> |
else |
2312 |
> |
tab = (Node[])fk; |
2313 |
> |
} |
2314 |
|
else if ((fh & LOCKED) != 0) { |
2315 |
|
counter.add(delta); // opportunistically update count |
2316 |
|
delta = 0L; |
2317 |
|
f.tryAwaitLock(tab, i); |
2318 |
|
} |
2319 |
|
else if (f.casHash(fh, fh | LOCKED)) { |
1259 |
– |
boolean validated = false; |
2320 |
|
try { |
2321 |
|
if (tabAt(tab, i) == f) { |
1262 |
– |
validated = true; |
2322 |
|
for (Node e = f; e != null; e = e.next) { |
2323 |
< |
if (e.val != null) { // currently always true |
2323 |
> |
if (e.val != null) { // (currently always true) |
2324 |
|
e.val = null; |
2325 |
|
--delta; |
2326 |
|
} |
2327 |
|
} |
2328 |
|
setTabAt(tab, i, null); |
2329 |
+ |
++i; |
2330 |
|
} |
2331 |
|
} finally { |
2332 |
|
if (!f.casHash(fh | LOCKED, fh)) { |
2334 |
|
synchronized (f) { f.notifyAll(); }; |
2335 |
|
} |
2336 |
|
} |
1277 |
– |
if (validated) |
1278 |
– |
++i; |
2337 |
|
} |
2338 |
|
} |
2339 |
|
if (delta != 0) |
2340 |
|
counter.add(delta); |
2341 |
|
} |
2342 |
|
|
1285 |
– |
|
2343 |
|
/* ----------------Table Traversal -------------- */ |
2344 |
|
|
2345 |
|
/** |
2346 |
|
* Encapsulates traversal for methods such as containsValue; also |
2347 |
< |
* serves as a base class for other iterators. |
2347 |
> |
* serves as a base class for other iterators and bulk tasks. |
2348 |
|
* |
2349 |
|
* At each step, the iterator snapshots the key ("nextKey") and |
2350 |
|
* value ("nextVal") of a valid node (i.e., one that, at point of |
2351 |
< |
* snapshot, has a nonnull user value). Because val fields can |
2351 |
> |
* snapshot, has a non-null user value). Because val fields can |
2352 |
|
* change (including to null, indicating deletion), field nextVal |
2353 |
|
* might not be accurate at point of use, but still maintains the |
2354 |
|
* weak consistency property of holding a value that was once |
2355 |
< |
* valid. |
2355 |
> |
* valid. To support iterator.remove, the nextKey field is not |
2356 |
> |
* updated (nulled out) when the iterator cannot advance. |
2357 |
|
* |
2358 |
|
* Internal traversals directly access these fields, as in: |
2359 |
< |
* {@code while (it.next != null) { process(it.nextKey); it.advance(); }} |
2359 |
> |
* {@code while (it.advance() != null) { process(it.nextKey); }} |
2360 |
|
* |
2361 |
< |
* Exported iterators (subclasses of ViewIterator) extract key, |
2362 |
< |
* value, or key-value pairs as return values of Iterator.next(), |
2363 |
< |
* and encapsulate the it.next check as hasNext(); |
2361 |
> |
* Exported iterators must track whether the iterator has advanced |
2362 |
> |
* (in hasNext vs next) (by setting/checking/nulling field |
2363 |
> |
* nextVal), and then extract key, value, or key-value pairs as |
2364 |
> |
* return values of next(). |
2365 |
|
* |
2366 |
|
* The iterator visits once each still-valid node that was |
2367 |
|
* reachable upon iterator construction. It might miss some that |
2380 |
|
* across threads, iteration terminates if a bounds checks fails |
2381 |
|
* for a table read. |
2382 |
|
* |
2383 |
< |
* The range-based constructor enables creation of parallel |
2384 |
< |
* range-splitting traversals. (Not yet implemented.) |
2383 |
> |
* This class extends ForkJoinTask to streamline parallel |
2384 |
> |
* iteration in bulk operations (see BulkTask). This adds only an |
2385 |
> |
* int of space overhead, which is close enough to negligible in |
2386 |
> |
* cases where it is not needed to not worry about it. Because |
2387 |
> |
* ForkJoinTask is Serializable, but iterators need not be, we |
2388 |
> |
* need to add warning suppressions. |
2389 |
|
*/ |
2390 |
< |
static class InternalIterator { |
2390 |
> |
@SuppressWarnings("serial") static class Traverser<K,V,R> extends ForkJoinTask<R> { |
2391 |
> |
final ConcurrentHashMapV8<K, V> map; |
2392 |
|
Node next; // the next entry to use |
1329 |
– |
Node last; // the last entry used |
2393 |
|
Object nextKey; // cached key field of next |
2394 |
|
Object nextVal; // cached val field of next |
2395 |
|
Node[] tab; // current table; updated if resized |
2396 |
|
int index; // index of bin to use next |
2397 |
|
int baseIndex; // current index of initial table |
2398 |
< |
final int baseLimit; // index bound for initial table |
2399 |
< |
final int baseSize; // initial table size |
2398 |
> |
int baseLimit; // index bound for initial table |
2399 |
> |
int baseSize; // initial table size |
2400 |
|
|
2401 |
|
/** Creates iterator for all entries in the table. */ |
2402 |
< |
InternalIterator(Node[] tab) { |
2403 |
< |
this.tab = tab; |
2404 |
< |
baseLimit = baseSize = (tab == null) ? 0 : tab.length; |
2405 |
< |
index = baseIndex = 0; |
2406 |
< |
next = null; |
2407 |
< |
advance(); |
2408 |
< |
} |
2409 |
< |
|
2410 |
< |
/** Creates iterator for the given range of the table */ |
2411 |
< |
InternalIterator(Node[] tab, int lo, int hi) { |
2412 |
< |
this.tab = tab; |
2413 |
< |
baseSize = (tab == null) ? 0 : tab.length; |
2414 |
< |
baseLimit = (hi <= baseSize) ? hi : baseSize; |
2415 |
< |
index = baseIndex = (lo >= 0) ? lo : 0; |
2416 |
< |
next = null; |
2417 |
< |
advance(); |
2418 |
< |
} |
2419 |
< |
|
2420 |
< |
/** Advances next. See above for explanation. */ |
2421 |
< |
final void advance() { |
2422 |
< |
Node e = last = next; |
2402 |
> |
Traverser(ConcurrentHashMapV8<K, V> map) { |
2403 |
> |
this.map = map; |
2404 |
> |
} |
2405 |
> |
|
2406 |
> |
/** Creates iterator for split() methods */ |
2407 |
> |
Traverser(Traverser<K,V,?> it) { |
2408 |
> |
ConcurrentHashMapV8<K, V> m; Node[] t; |
2409 |
> |
if ((m = this.map = it.map) == null) |
2410 |
> |
t = null; |
2411 |
> |
else if ((t = it.tab) == null && // force parent tab initialization |
2412 |
> |
(t = it.tab = m.table) != null) |
2413 |
> |
it.baseLimit = it.baseSize = t.length; |
2414 |
> |
this.tab = t; |
2415 |
> |
this.baseSize = it.baseSize; |
2416 |
> |
it.baseLimit = this.index = this.baseIndex = |
2417 |
> |
((this.baseLimit = it.baseLimit) + it.baseIndex + 1) >>> 1; |
2418 |
> |
} |
2419 |
> |
|
2420 |
> |
/** |
2421 |
> |
* Advances next; returns nextVal or null if terminated. |
2422 |
> |
* See above for explanation. |
2423 |
> |
*/ |
2424 |
> |
final Object advance() { |
2425 |
> |
Node e = next; |
2426 |
> |
Object ev = null; |
2427 |
|
outer: do { |
2428 |
|
if (e != null) // advance past used/skipped node |
2429 |
|
e = e.next; |
2430 |
|
while (e == null) { // get to next non-null bin |
2431 |
< |
Node[] t; int b, i, n; // checks must use locals |
2432 |
< |
if ((b = baseIndex) >= baseLimit || (i = index) < 0 || |
2433 |
< |
(t = tab) == null || i >= (n = t.length)) |
2431 |
> |
ConcurrentHashMapV8<K, V> m; |
2432 |
> |
Node[] t; int b, i, n; Object ek; // checks must use locals |
2433 |
> |
if ((t = tab) != null) |
2434 |
> |
n = t.length; |
2435 |
> |
else if ((m = map) != null && (t = tab = m.table) != null) |
2436 |
> |
n = baseLimit = baseSize = t.length; |
2437 |
> |
else |
2438 |
> |
break outer; |
2439 |
> |
if ((b = baseIndex) >= baseLimit || |
2440 |
> |
(i = index) < 0 || i >= n) |
2441 |
|
break outer; |
2442 |
< |
else if ((e = tabAt(t, i)) != null && e.hash == MOVED) |
2443 |
< |
tab = (Node[])e.key; // restarts due to null val |
2444 |
< |
else // visit upper slots if present |
2445 |
< |
index = (i += baseSize) < n ? i : (baseIndex = b + 1); |
2442 |
> |
if ((e = tabAt(t, i)) != null && e.hash == MOVED) { |
2443 |
> |
if ((ek = e.key) instanceof TreeBin) |
2444 |
> |
e = ((TreeBin)ek).first; |
2445 |
> |
else { |
2446 |
> |
tab = (Node[])ek; |
2447 |
> |
continue; // restarts due to null val |
2448 |
> |
} |
2449 |
> |
} // visit upper slots if present |
2450 |
> |
index = (i += baseSize) < n ? i : (baseIndex = b + 1); |
2451 |
|
} |
2452 |
|
nextKey = e.key; |
2453 |
< |
} while ((nextVal = e.val) == null);// skip deleted or special nodes |
2453 |
> |
} while ((ev = e.val) == null); // skip deleted or special nodes |
2454 |
|
next = e; |
2455 |
+ |
return nextVal = ev; |
2456 |
+ |
} |
2457 |
+ |
|
2458 |
+ |
public final void remove() { |
2459 |
+ |
Object k = nextKey; |
2460 |
+ |
if (k == null && (advance() == null || (k = nextKey) == null)) |
2461 |
+ |
throw new IllegalStateException(); |
2462 |
+ |
map.internalReplace(k, null, null); |
2463 |
|
} |
2464 |
+ |
|
2465 |
+ |
public final boolean hasNext() { |
2466 |
+ |
return nextVal != null || advance() != null; |
2467 |
+ |
} |
2468 |
+ |
|
2469 |
+ |
public final boolean hasMoreElements() { return hasNext(); } |
2470 |
+ |
public final void setRawResult(Object x) { } |
2471 |
+ |
public R getRawResult() { return null; } |
2472 |
+ |
public boolean exec() { return true; } |
2473 |
|
} |
2474 |
|
|
2475 |
|
/* ---------------- Public operations -------------- */ |
2476 |
|
|
2477 |
|
/** |
2478 |
< |
* Creates a new, empty map with the default initial table size (16), |
2478 |
> |
* Creates a new, empty map with the default initial table size (16). |
2479 |
|
*/ |
2480 |
|
public ConcurrentHashMapV8() { |
2481 |
|
this.counter = new LongAdder(); |
2556 |
|
if (initialCapacity < concurrencyLevel) // Use at least as many bins |
2557 |
|
initialCapacity = concurrencyLevel; // as estimated threads |
2558 |
|
long size = (long)(1.0 + (long)initialCapacity / loadFactor); |
2559 |
< |
int cap = ((size >= (long)MAXIMUM_CAPACITY) ? |
2560 |
< |
MAXIMUM_CAPACITY: tableSizeFor((int)size)); |
2559 |
> |
int cap = (size >= (long)MAXIMUM_CAPACITY) ? |
2560 |
> |
MAXIMUM_CAPACITY : tableSizeFor((int)size); |
2561 |
|
this.counter = new LongAdder(); |
2562 |
|
this.sizeCtl = cap; |
2563 |
|
} |
2564 |
|
|
2565 |
|
/** |
2566 |
+ |
* Creates a new {@link Set} backed by a ConcurrentHashMapV8 |
2567 |
+ |
* from the given type to {@code Boolean.TRUE}. |
2568 |
+ |
* |
2569 |
+ |
* @return the new set |
2570 |
+ |
*/ |
2571 |
+ |
public static <K> KeySetView<K,Boolean> newKeySet() { |
2572 |
+ |
return new KeySetView<K,Boolean>(new ConcurrentHashMapV8<K,Boolean>(), |
2573 |
+ |
Boolean.TRUE); |
2574 |
+ |
} |
2575 |
+ |
|
2576 |
+ |
/** |
2577 |
+ |
* Creates a new {@link Set} backed by a ConcurrentHashMapV8 |
2578 |
+ |
* from the given type to {@code Boolean.TRUE}. |
2579 |
+ |
* |
2580 |
+ |
* @param initialCapacity The implementation performs internal |
2581 |
+ |
* sizing to accommodate this many elements. |
2582 |
+ |
* @throws IllegalArgumentException if the initial capacity of |
2583 |
+ |
* elements is negative |
2584 |
+ |
* @return the new set |
2585 |
+ |
*/ |
2586 |
+ |
public static <K> KeySetView<K,Boolean> newKeySet(int initialCapacity) { |
2587 |
+ |
return new KeySetView<K,Boolean>(new ConcurrentHashMapV8<K,Boolean>(initialCapacity), |
2588 |
+ |
Boolean.TRUE); |
2589 |
+ |
} |
2590 |
+ |
|
2591 |
+ |
/** |
2592 |
|
* {@inheritDoc} |
2593 |
|
*/ |
2594 |
|
public boolean isEmpty() { |
2605 |
|
(int)n); |
2606 |
|
} |
2607 |
|
|
2608 |
< |
final long longSize() { // accurate version of size needed for views |
2608 |
> |
/** |
2609 |
> |
* Returns the number of mappings. This method should be used |
2610 |
> |
* instead of {@link #size} because a ConcurrentHashMapV8 may |
2611 |
> |
* contain more mappings than can be represented as an int. The |
2612 |
> |
* value returned is a snapshot; the actual count may differ if |
2613 |
> |
* there are ongoing concurrent insertions or removals. |
2614 |
> |
* |
2615 |
> |
* @return the number of mappings |
2616 |
> |
*/ |
2617 |
> |
public long mappingCount() { |
2618 |
|
long n = counter.sum(); |
2619 |
< |
return (n < 0L) ? 0L : n; |
2619 |
> |
return (n < 0L) ? 0L : n; // ignore transient negative values |
2620 |
|
} |
2621 |
|
|
2622 |
|
/** |
2630 |
|
* |
2631 |
|
* @throws NullPointerException if the specified key is null |
2632 |
|
*/ |
2633 |
< |
@SuppressWarnings("unchecked") |
1503 |
< |
public V get(Object key) { |
2633 |
> |
@SuppressWarnings("unchecked") public V get(Object key) { |
2634 |
|
if (key == null) |
2635 |
|
throw new NullPointerException(); |
2636 |
|
return (V)internalGet(key); |
2637 |
|
} |
2638 |
|
|
2639 |
|
/** |
2640 |
+ |
* Returns the value to which the specified key is mapped, |
2641 |
+ |
* or the given defaultValue if this map contains no mapping for the key. |
2642 |
+ |
* |
2643 |
+ |
* @param key the key |
2644 |
+ |
* @param defaultValue the value to return if this map contains |
2645 |
+ |
* no mapping for the given key |
2646 |
+ |
* @return the mapping for the key, if present; else the defaultValue |
2647 |
+ |
* @throws NullPointerException if the specified key is null |
2648 |
+ |
*/ |
2649 |
+ |
@SuppressWarnings("unchecked") public V getValueOrDefault(Object key, V defaultValue) { |
2650 |
+ |
if (key == null) |
2651 |
+ |
throw new NullPointerException(); |
2652 |
+ |
V v = (V) internalGet(key); |
2653 |
+ |
return v == null ? defaultValue : v; |
2654 |
+ |
} |
2655 |
+ |
|
2656 |
+ |
/** |
2657 |
|
* Tests if the specified object is a key in this table. |
2658 |
|
* |
2659 |
|
* @param key possible key |
2682 |
|
if (value == null) |
2683 |
|
throw new NullPointerException(); |
2684 |
|
Object v; |
2685 |
< |
InternalIterator it = new InternalIterator(table); |
2686 |
< |
while (it.next != null) { |
2687 |
< |
if ((v = it.nextVal) == value || value.equals(v)) |
2685 |
> |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
2686 |
> |
while ((v = it.advance()) != null) { |
2687 |
> |
if (v == value || value.equals(v)) |
2688 |
|
return true; |
1542 |
– |
it.advance(); |
2689 |
|
} |
2690 |
|
return false; |
2691 |
|
} |
2722 |
|
* {@code null} if there was no mapping for {@code key} |
2723 |
|
* @throws NullPointerException if the specified key or value is null |
2724 |
|
*/ |
2725 |
< |
@SuppressWarnings("unchecked") |
1580 |
< |
public V put(K key, V value) { |
2725 |
> |
@SuppressWarnings("unchecked") public V put(K key, V value) { |
2726 |
|
if (key == null || value == null) |
2727 |
|
throw new NullPointerException(); |
2728 |
|
return (V)internalPut(key, value); |
2735 |
|
* or {@code null} if there was no mapping for the key |
2736 |
|
* @throws NullPointerException if the specified key or value is null |
2737 |
|
*/ |
2738 |
< |
@SuppressWarnings("unchecked") |
1594 |
< |
public V putIfAbsent(K key, V value) { |
2738 |
> |
@SuppressWarnings("unchecked") public V putIfAbsent(K key, V value) { |
2739 |
|
if (key == null || value == null) |
2740 |
|
throw new NullPointerException(); |
2741 |
|
return (V)internalPutIfAbsent(key, value); |
2754 |
|
|
2755 |
|
/** |
2756 |
|
* If the specified key is not already associated with a value, |
2757 |
< |
* computes its value using the given mappingFunction and |
2758 |
< |
* enters it into the map. This is equivalent to |
2757 |
> |
* computes its value using the given mappingFunction and enters |
2758 |
> |
* it into the map unless null. This is equivalent to |
2759 |
|
* <pre> {@code |
2760 |
|
* if (map.containsKey(key)) |
2761 |
|
* return map.get(key); |
2762 |
< |
* value = mappingFunction.map(key); |
2763 |
< |
* map.put(key, value); |
2762 |
> |
* value = mappingFunction.apply(key); |
2763 |
> |
* if (value != null) |
2764 |
> |
* map.put(key, value); |
2765 |
|
* return value;}</pre> |
2766 |
|
* |
2767 |
|
* except that the action is performed atomically. If the |
2768 |
< |
* function returns {@code null} (in which case a {@code |
2769 |
< |
* NullPointerException} is thrown), or the function itself throws |
2770 |
< |
* an (unchecked) exception, the exception is rethrown to its |
2771 |
< |
* caller, and no mapping is recorded. Some attempted update |
2772 |
< |
* operations on this map by other threads may be blocked while |
2773 |
< |
* computation is in progress, so the computation should be short |
2774 |
< |
* and simple, and must not attempt to update any other mappings |
2775 |
< |
* of this Map. The most appropriate usage is to construct a new |
2776 |
< |
* object serving as an initial mapped value, or memoized result, |
1632 |
< |
* as in: |
2768 |
> |
* function returns {@code null} no mapping is recorded. If the |
2769 |
> |
* function itself throws an (unchecked) exception, the exception |
2770 |
> |
* is rethrown to its caller, and no mapping is recorded. Some |
2771 |
> |
* attempted update operations on this map by other threads may be |
2772 |
> |
* blocked while computation is in progress, so the computation |
2773 |
> |
* should be short and simple, and must not attempt to update any |
2774 |
> |
* other mappings of this Map. The most appropriate usage is to |
2775 |
> |
* construct a new object serving as an initial mapped value, or |
2776 |
> |
* memoized result, as in: |
2777 |
|
* |
2778 |
|
* <pre> {@code |
2779 |
< |
* map.computeIfAbsent(key, new MappingFunction<K, V>() { |
2779 |
> |
* map.computeIfAbsent(key, new Fun<K, V>() { |
2780 |
|
* public V map(K k) { return new Value(f(k)); }});}</pre> |
2781 |
|
* |
2782 |
|
* @param key key with which the specified value is to be associated |
2783 |
|
* @param mappingFunction the function to compute a value |
2784 |
|
* @return the current (existing or computed) value associated with |
2785 |
< |
* the specified key. |
2786 |
< |
* @throws NullPointerException if the specified key, mappingFunction, |
2787 |
< |
* or computed value is null |
2785 |
> |
* the specified key, or null if the computed value is null |
2786 |
> |
* @throws NullPointerException if the specified key or mappingFunction |
2787 |
> |
* is null |
2788 |
|
* @throws IllegalStateException if the computation detectably |
2789 |
|
* attempts a recursive update to this map that would |
2790 |
|
* otherwise never complete |
2791 |
|
* @throws RuntimeException or Error if the mappingFunction does so, |
2792 |
|
* in which case the mapping is left unestablished |
2793 |
|
*/ |
2794 |
< |
@SuppressWarnings("unchecked") |
2795 |
< |
public V computeIfAbsent(K key, MappingFunction<? super K, ? extends V> mappingFunction) { |
2794 |
> |
@SuppressWarnings("unchecked") public V computeIfAbsent |
2795 |
> |
(K key, Fun<? super K, ? extends V> mappingFunction) { |
2796 |
|
if (key == null || mappingFunction == null) |
2797 |
|
throw new NullPointerException(); |
2798 |
|
return (V)internalComputeIfAbsent(key, mappingFunction); |
2799 |
|
} |
2800 |
|
|
2801 |
|
/** |
2802 |
< |
* Computes and enters a new mapping value given a key and |
2802 |
> |
* If the given key is present, computes a new mapping value given a key and |
2803 |
> |
* its current mapped value. This is equivalent to |
2804 |
> |
* <pre> {@code |
2805 |
> |
* if (map.containsKey(key)) { |
2806 |
> |
* value = remappingFunction.apply(key, map.get(key)); |
2807 |
> |
* if (value != null) |
2808 |
> |
* map.put(key, value); |
2809 |
> |
* else |
2810 |
> |
* map.remove(key); |
2811 |
> |
* } |
2812 |
> |
* }</pre> |
2813 |
> |
* |
2814 |
> |
* except that the action is performed atomically. If the |
2815 |
> |
* function returns {@code null}, the mapping is removed. If the |
2816 |
> |
* function itself throws an (unchecked) exception, the exception |
2817 |
> |
* is rethrown to its caller, and the current mapping is left |
2818 |
> |
* unchanged. Some attempted update operations on this map by |
2819 |
> |
* other threads may be blocked while computation is in progress, |
2820 |
> |
* so the computation should be short and simple, and must not |
2821 |
> |
* attempt to update any other mappings of this Map. For example, |
2822 |
> |
* to either create or append new messages to a value mapping: |
2823 |
> |
* |
2824 |
> |
* @param key key with which the specified value is to be associated |
2825 |
> |
* @param remappingFunction the function to compute a value |
2826 |
> |
* @return the new value associated with the specified key, or null if none |
2827 |
> |
* @throws NullPointerException if the specified key or remappingFunction |
2828 |
> |
* is null |
2829 |
> |
* @throws IllegalStateException if the computation detectably |
2830 |
> |
* attempts a recursive update to this map that would |
2831 |
> |
* otherwise never complete |
2832 |
> |
* @throws RuntimeException or Error if the remappingFunction does so, |
2833 |
> |
* in which case the mapping is unchanged |
2834 |
> |
*/ |
2835 |
> |
@SuppressWarnings("unchecked") public V computeIfPresent |
2836 |
> |
(K key, BiFun<? super K, ? super V, ? extends V> remappingFunction) { |
2837 |
> |
if (key == null || remappingFunction == null) |
2838 |
> |
throw new NullPointerException(); |
2839 |
> |
return (V)internalCompute(key, true, remappingFunction); |
2840 |
> |
} |
2841 |
> |
|
2842 |
> |
/** |
2843 |
> |
* Computes a new mapping value given a key and |
2844 |
|
* its current mapped value (or {@code null} if there is no current |
2845 |
|
* mapping). This is equivalent to |
2846 |
|
* <pre> {@code |
2847 |
< |
* map.put(key, remappingFunction.remap(key, map.get(key)); |
2847 |
> |
* value = remappingFunction.apply(key, map.get(key)); |
2848 |
> |
* if (value != null) |
2849 |
> |
* map.put(key, value); |
2850 |
> |
* else |
2851 |
> |
* map.remove(key); |
2852 |
|
* }</pre> |
2853 |
|
* |
2854 |
|
* except that the action is performed atomically. If the |
2855 |
< |
* function returns {@code null} (in which case a {@code |
2856 |
< |
* NullPointerException} is thrown), or the function itself throws |
2857 |
< |
* an (unchecked) exception, the exception is rethrown to its |
2858 |
< |
* caller, and current mapping is left unchanged. Some attempted |
2859 |
< |
* update operations on this map by other threads may be blocked |
2860 |
< |
* while computation is in progress, so the computation should be |
2861 |
< |
* short and simple, and must not attempt to update any other |
2862 |
< |
* mappings of this Map. For example, to either create or |
1674 |
< |
* append new messages to a value mapping: |
2855 |
> |
* function returns {@code null}, the mapping is removed. If the |
2856 |
> |
* function itself throws an (unchecked) exception, the exception |
2857 |
> |
* is rethrown to its caller, and the current mapping is left |
2858 |
> |
* unchanged. Some attempted update operations on this map by |
2859 |
> |
* other threads may be blocked while computation is in progress, |
2860 |
> |
* so the computation should be short and simple, and must not |
2861 |
> |
* attempt to update any other mappings of this Map. For example, |
2862 |
> |
* to either create or append new messages to a value mapping: |
2863 |
|
* |
2864 |
|
* <pre> {@code |
2865 |
|
* Map<Key, String> map = ...; |
2866 |
|
* final String msg = ...; |
2867 |
< |
* map.compute(key, new RemappingFunction<Key, String>() { |
2868 |
< |
* public String remap(Key k, String v) { |
2867 |
> |
* map.compute(key, new BiFun<Key, String, String>() { |
2868 |
> |
* public String apply(Key k, String v) { |
2869 |
|
* return (v == null) ? msg : v + msg;});}}</pre> |
2870 |
|
* |
2871 |
|
* @param key key with which the specified value is to be associated |
2872 |
|
* @param remappingFunction the function to compute a value |
2873 |
< |
* @return the new value associated with |
1686 |
< |
* the specified key. |
2873 |
> |
* @return the new value associated with the specified key, or null if none |
2874 |
|
* @throws NullPointerException if the specified key or remappingFunction |
2875 |
< |
* or computed value is null |
2875 |
> |
* is null |
2876 |
|
* @throws IllegalStateException if the computation detectably |
2877 |
|
* attempts a recursive update to this map that would |
2878 |
|
* otherwise never complete |
2879 |
|
* @throws RuntimeException or Error if the remappingFunction does so, |
2880 |
|
* in which case the mapping is unchanged |
2881 |
|
*/ |
2882 |
< |
@SuppressWarnings("unchecked") |
2883 |
< |
public V compute(K key, RemappingFunction<? super K, V> remappingFunction) { |
2882 |
> |
@SuppressWarnings("unchecked") public V compute |
2883 |
> |
(K key, BiFun<? super K, ? super V, ? extends V> remappingFunction) { |
2884 |
|
if (key == null || remappingFunction == null) |
2885 |
|
throw new NullPointerException(); |
2886 |
< |
return (V)internalCompute(key, remappingFunction); |
2886 |
> |
return (V)internalCompute(key, false, remappingFunction); |
2887 |
> |
} |
2888 |
> |
|
2889 |
> |
/** |
2890 |
> |
* If the specified key is not already associated |
2891 |
> |
* with a value, associate it with the given value. |
2892 |
> |
* Otherwise, replace the value with the results of |
2893 |
> |
* the given remapping function. This is equivalent to: |
2894 |
> |
* <pre> {@code |
2895 |
> |
* if (!map.containsKey(key)) |
2896 |
> |
* map.put(value); |
2897 |
> |
* else { |
2898 |
> |
* newValue = remappingFunction.apply(map.get(key), value); |
2899 |
> |
* if (value != null) |
2900 |
> |
* map.put(key, value); |
2901 |
> |
* else |
2902 |
> |
* map.remove(key); |
2903 |
> |
* } |
2904 |
> |
* }</pre> |
2905 |
> |
* except that the action is performed atomically. If the |
2906 |
> |
* function returns {@code null}, the mapping is removed. If the |
2907 |
> |
* function itself throws an (unchecked) exception, the exception |
2908 |
> |
* is rethrown to its caller, and the current mapping is left |
2909 |
> |
* unchanged. Some attempted update operations on this map by |
2910 |
> |
* other threads may be blocked while computation is in progress, |
2911 |
> |
* so the computation should be short and simple, and must not |
2912 |
> |
* attempt to update any other mappings of this Map. |
2913 |
> |
*/ |
2914 |
> |
@SuppressWarnings("unchecked") public V merge |
2915 |
> |
(K key, V value, BiFun<? super V, ? super V, ? extends V> remappingFunction) { |
2916 |
> |
if (key == null || value == null || remappingFunction == null) |
2917 |
> |
throw new NullPointerException(); |
2918 |
> |
return (V)internalMerge(key, value, remappingFunction); |
2919 |
|
} |
2920 |
|
|
2921 |
|
/** |
2927 |
|
* {@code null} if there was no mapping for {@code key} |
2928 |
|
* @throws NullPointerException if the specified key is null |
2929 |
|
*/ |
2930 |
< |
@SuppressWarnings("unchecked") |
1712 |
< |
public V remove(Object key) { |
2930 |
> |
@SuppressWarnings("unchecked") public V remove(Object key) { |
2931 |
|
if (key == null) |
2932 |
|
throw new NullPointerException(); |
2933 |
|
return (V)internalReplace(key, null, null); |
2964 |
|
* or {@code null} if there was no mapping for the key |
2965 |
|
* @throws NullPointerException if the specified key or value is null |
2966 |
|
*/ |
2967 |
< |
@SuppressWarnings("unchecked") |
1750 |
< |
public V replace(K key, V value) { |
2967 |
> |
@SuppressWarnings("unchecked") public V replace(K key, V value) { |
2968 |
|
if (key == null || value == null) |
2969 |
|
throw new NullPointerException(); |
2970 |
|
return (V)internalReplace(key, value, null); |
2980 |
|
/** |
2981 |
|
* Returns a {@link Set} view of the keys contained in this map. |
2982 |
|
* The set is backed by the map, so changes to the map are |
2983 |
< |
* reflected in the set, and vice-versa. The set supports element |
1767 |
< |
* removal, which removes the corresponding mapping from this map, |
1768 |
< |
* via the {@code Iterator.remove}, {@code Set.remove}, |
1769 |
< |
* {@code removeAll}, {@code retainAll}, and {@code clear} |
1770 |
< |
* operations. It does not support the {@code add} or |
1771 |
< |
* {@code addAll} operations. |
2983 |
> |
* reflected in the set, and vice-versa. |
2984 |
|
* |
2985 |
< |
* <p>The view's {@code iterator} is a "weakly consistent" iterator |
1774 |
< |
* that will never throw {@link ConcurrentModificationException}, |
1775 |
< |
* and guarantees to traverse elements as they existed upon |
1776 |
< |
* construction of the iterator, and may (but is not guaranteed to) |
1777 |
< |
* reflect any modifications subsequent to construction. |
2985 |
> |
* @return the set view |
2986 |
|
*/ |
2987 |
< |
public Set<K> keySet() { |
2988 |
< |
KeySet<K,V> ks = keySet; |
2989 |
< |
return (ks != null) ? ks : (keySet = new KeySet<K,V>(this)); |
2987 |
> |
public KeySetView<K,V> keySet() { |
2988 |
> |
KeySetView<K,V> ks = keySet; |
2989 |
> |
return (ks != null) ? ks : (keySet = new KeySetView<K,V>(this, null)); |
2990 |
> |
} |
2991 |
> |
|
2992 |
> |
/** |
2993 |
> |
* Returns a {@link Set} view of the keys in this map, using the |
2994 |
> |
* given common mapped value for any additions (i.e., {@link |
2995 |
> |
* Collection#add} and {@link Collection#addAll}). This is of |
2996 |
> |
* course only appropriate if it is acceptable to use the same |
2997 |
> |
* value for all additions from this view. |
2998 |
> |
* |
2999 |
> |
* @param mappedValue the mapped value to use for any |
3000 |
> |
* additions. |
3001 |
> |
* @return the set view |
3002 |
> |
* @throws NullPointerException if the mappedValue is null |
3003 |
> |
*/ |
3004 |
> |
public KeySetView<K,V> keySet(V mappedValue) { |
3005 |
> |
if (mappedValue == null) |
3006 |
> |
throw new NullPointerException(); |
3007 |
> |
return new KeySetView<K,V>(this, mappedValue); |
3008 |
|
} |
3009 |
|
|
3010 |
|
/** |
3011 |
|
* Returns a {@link Collection} view of the values contained in this map. |
3012 |
|
* The collection is backed by the map, so changes to the map are |
3013 |
< |
* reflected in the collection, and vice-versa. The collection |
1788 |
< |
* supports element removal, which removes the corresponding |
1789 |
< |
* mapping from this map, via the {@code Iterator.remove}, |
1790 |
< |
* {@code Collection.remove}, {@code removeAll}, |
1791 |
< |
* {@code retainAll}, and {@code clear} operations. It does not |
1792 |
< |
* support the {@code add} or {@code addAll} operations. |
1793 |
< |
* |
1794 |
< |
* <p>The view's {@code iterator} is a "weakly consistent" iterator |
1795 |
< |
* that will never throw {@link ConcurrentModificationException}, |
1796 |
< |
* and guarantees to traverse elements as they existed upon |
1797 |
< |
* construction of the iterator, and may (but is not guaranteed to) |
1798 |
< |
* reflect any modifications subsequent to construction. |
3013 |
> |
* reflected in the collection, and vice-versa. |
3014 |
|
*/ |
3015 |
< |
public Collection<V> values() { |
3016 |
< |
Values<K,V> vs = values; |
3017 |
< |
return (vs != null) ? vs : (values = new Values<K,V>(this)); |
3015 |
> |
public ValuesView<K,V> values() { |
3016 |
> |
ValuesView<K,V> vs = values; |
3017 |
> |
return (vs != null) ? vs : (values = new ValuesView<K,V>(this)); |
3018 |
|
} |
3019 |
|
|
3020 |
|
/** |
3034 |
|
* reflect any modifications subsequent to construction. |
3035 |
|
*/ |
3036 |
|
public Set<Map.Entry<K,V>> entrySet() { |
3037 |
< |
EntrySet<K,V> es = entrySet; |
3038 |
< |
return (es != null) ? es : (entrySet = new EntrySet<K,V>(this)); |
3037 |
> |
EntrySetView<K,V> es = entrySet; |
3038 |
> |
return (es != null) ? es : (entrySet = new EntrySetView<K,V>(this)); |
3039 |
|
} |
3040 |
|
|
3041 |
|
/** |
3059 |
|
} |
3060 |
|
|
3061 |
|
/** |
3062 |
+ |
* Returns a partitionable iterator of the keys in this map. |
3063 |
+ |
* |
3064 |
+ |
* @return a partitionable iterator of the keys in this map |
3065 |
+ |
*/ |
3066 |
+ |
public Spliterator<K> keySpliterator() { |
3067 |
+ |
return new KeyIterator<K,V>(this); |
3068 |
+ |
} |
3069 |
+ |
|
3070 |
+ |
/** |
3071 |
+ |
* Returns a partitionable iterator of the values in this map. |
3072 |
+ |
* |
3073 |
+ |
* @return a partitionable iterator of the values in this map |
3074 |
+ |
*/ |
3075 |
+ |
public Spliterator<V> valueSpliterator() { |
3076 |
+ |
return new ValueIterator<K,V>(this); |
3077 |
+ |
} |
3078 |
+ |
|
3079 |
+ |
/** |
3080 |
+ |
* Returns a partitionable iterator of the entries in this map. |
3081 |
+ |
* |
3082 |
+ |
* @return a partitionable iterator of the entries in this map |
3083 |
+ |
*/ |
3084 |
+ |
public Spliterator<Map.Entry<K,V>> entrySpliterator() { |
3085 |
+ |
return new EntryIterator<K,V>(this); |
3086 |
+ |
} |
3087 |
+ |
|
3088 |
+ |
/** |
3089 |
|
* Returns the hash code value for this {@link Map}, i.e., |
3090 |
|
* the sum of, for each key-value pair in the map, |
3091 |
|
* {@code key.hashCode() ^ value.hashCode()}. |
3094 |
|
*/ |
3095 |
|
public int hashCode() { |
3096 |
|
int h = 0; |
3097 |
< |
InternalIterator it = new InternalIterator(table); |
3098 |
< |
while (it.next != null) { |
3099 |
< |
h += it.nextKey.hashCode() ^ it.nextVal.hashCode(); |
3100 |
< |
it.advance(); |
3097 |
> |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3098 |
> |
Object v; |
3099 |
> |
while ((v = it.advance()) != null) { |
3100 |
> |
h += it.nextKey.hashCode() ^ v.hashCode(); |
3101 |
|
} |
3102 |
|
return h; |
3103 |
|
} |
3114 |
|
* @return a string representation of this map |
3115 |
|
*/ |
3116 |
|
public String toString() { |
3117 |
< |
InternalIterator it = new InternalIterator(table); |
3117 |
> |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3118 |
|
StringBuilder sb = new StringBuilder(); |
3119 |
|
sb.append('{'); |
3120 |
< |
if (it.next != null) { |
3120 |
> |
Object v; |
3121 |
> |
if ((v = it.advance()) != null) { |
3122 |
|
for (;;) { |
3123 |
< |
Object k = it.nextKey, v = it.nextVal; |
3123 |
> |
Object k = it.nextKey; |
3124 |
|
sb.append(k == this ? "(this Map)" : k); |
3125 |
|
sb.append('='); |
3126 |
|
sb.append(v == this ? "(this Map)" : v); |
3127 |
< |
it.advance(); |
1885 |
< |
if (it.next == null) |
3127 |
> |
if ((v = it.advance()) == null) |
3128 |
|
break; |
3129 |
|
sb.append(',').append(' '); |
3130 |
|
} |
3147 |
|
if (!(o instanceof Map)) |
3148 |
|
return false; |
3149 |
|
Map<?,?> m = (Map<?,?>) o; |
3150 |
< |
InternalIterator it = new InternalIterator(table); |
3151 |
< |
while (it.next != null) { |
3152 |
< |
Object val = it.nextVal; |
3150 |
> |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3151 |
> |
Object val; |
3152 |
> |
while ((val = it.advance()) != null) { |
3153 |
|
Object v = m.get(it.nextKey); |
3154 |
|
if (v == null || (v != val && !v.equals(val))) |
3155 |
|
return false; |
1914 |
– |
it.advance(); |
3156 |
|
} |
3157 |
|
for (Map.Entry<?,?> e : m.entrySet()) { |
3158 |
|
Object mk, mv, v; |
3168 |
|
|
3169 |
|
/* ----------------Iterators -------------- */ |
3170 |
|
|
3171 |
< |
/** |
3172 |
< |
* Base class for key, value, and entry iterators. Adds a map |
3173 |
< |
* reference to InternalIterator to support Iterator.remove. |
3174 |
< |
*/ |
3175 |
< |
static abstract class ViewIterator<K,V> extends InternalIterator { |
1935 |
< |
final ConcurrentHashMapV8<K, V> map; |
1936 |
< |
ViewIterator(ConcurrentHashMapV8<K, V> map) { |
1937 |
< |
super(map.table); |
1938 |
< |
this.map = map; |
3171 |
> |
@SuppressWarnings("serial") static final class KeyIterator<K,V> extends Traverser<K,V,Object> |
3172 |
> |
implements Spliterator<K>, Enumeration<K> { |
3173 |
> |
KeyIterator(ConcurrentHashMapV8<K, V> map) { super(map); } |
3174 |
> |
KeyIterator(Traverser<K,V,Object> it) { |
3175 |
> |
super(it); |
3176 |
|
} |
3177 |
< |
|
3178 |
< |
public final void remove() { |
1942 |
< |
if (last == null) |
3177 |
> |
public KeyIterator<K,V> split() { |
3178 |
> |
if (nextKey != null) |
3179 |
|
throw new IllegalStateException(); |
3180 |
< |
map.remove(last.key); |
1945 |
< |
last = null; |
3180 |
> |
return new KeyIterator<K,V>(this); |
3181 |
|
} |
3182 |
< |
|
3183 |
< |
public final boolean hasNext() { return next != null; } |
1949 |
< |
public final boolean hasMoreElements() { return next != null; } |
1950 |
< |
} |
1951 |
< |
|
1952 |
< |
static final class KeyIterator<K,V> extends ViewIterator<K,V> |
1953 |
< |
implements Iterator<K>, Enumeration<K> { |
1954 |
< |
KeyIterator(ConcurrentHashMapV8<K, V> map) { super(map); } |
1955 |
< |
|
1956 |
< |
@SuppressWarnings("unchecked") |
1957 |
< |
public final K next() { |
1958 |
< |
if (next == null) |
3182 |
> |
@SuppressWarnings("unchecked") public final K next() { |
3183 |
> |
if (nextVal == null && advance() == null) |
3184 |
|
throw new NoSuchElementException(); |
3185 |
|
Object k = nextKey; |
3186 |
< |
advance(); |
3187 |
< |
return (K)k; |
3186 |
> |
nextVal = null; |
3187 |
> |
return (K) k; |
3188 |
|
} |
3189 |
|
|
3190 |
|
public final K nextElement() { return next(); } |
3191 |
|
} |
3192 |
|
|
3193 |
< |
static final class ValueIterator<K,V> extends ViewIterator<K,V> |
3194 |
< |
implements Iterator<V>, Enumeration<V> { |
3193 |
> |
@SuppressWarnings("serial") static final class ValueIterator<K,V> extends Traverser<K,V,Object> |
3194 |
> |
implements Spliterator<V>, Enumeration<V> { |
3195 |
|
ValueIterator(ConcurrentHashMapV8<K, V> map) { super(map); } |
3196 |
+ |
ValueIterator(Traverser<K,V,Object> it) { |
3197 |
+ |
super(it); |
3198 |
+ |
} |
3199 |
+ |
public ValueIterator<K,V> split() { |
3200 |
+ |
if (nextKey != null) |
3201 |
+ |
throw new IllegalStateException(); |
3202 |
+ |
return new ValueIterator<K,V>(this); |
3203 |
+ |
} |
3204 |
|
|
3205 |
< |
@SuppressWarnings("unchecked") |
3206 |
< |
public final V next() { |
3207 |
< |
if (next == null) |
3205 |
> |
@SuppressWarnings("unchecked") public final V next() { |
3206 |
> |
Object v; |
3207 |
> |
if ((v = nextVal) == null && (v = advance()) == null) |
3208 |
|
throw new NoSuchElementException(); |
3209 |
< |
Object v = nextVal; |
3210 |
< |
advance(); |
1978 |
< |
return (V)v; |
3209 |
> |
nextVal = null; |
3210 |
> |
return (V) v; |
3211 |
|
} |
3212 |
|
|
3213 |
|
public final V nextElement() { return next(); } |
3214 |
|
} |
3215 |
|
|
3216 |
< |
static final class EntryIterator<K,V> extends ViewIterator<K,V> |
3217 |
< |
implements Iterator<Map.Entry<K,V>> { |
3216 |
> |
@SuppressWarnings("serial") static final class EntryIterator<K,V> extends Traverser<K,V,Object> |
3217 |
> |
implements Spliterator<Map.Entry<K,V>> { |
3218 |
|
EntryIterator(ConcurrentHashMapV8<K, V> map) { super(map); } |
3219 |
< |
|
3220 |
< |
@SuppressWarnings("unchecked") |
3221 |
< |
public final Map.Entry<K,V> next() { |
3222 |
< |
if (next == null) |
3223 |
< |
throw new NoSuchElementException(); |
3224 |
< |
Object k = nextKey; |
3225 |
< |
Object v = nextVal; |
1994 |
< |
advance(); |
1995 |
< |
return new WriteThroughEntry<K,V>((K)k, (V)v, map); |
3219 |
> |
EntryIterator(Traverser<K,V,Object> it) { |
3220 |
> |
super(it); |
3221 |
> |
} |
3222 |
> |
public EntryIterator<K,V> split() { |
3223 |
> |
if (nextKey != null) |
3224 |
> |
throw new IllegalStateException(); |
3225 |
> |
return new EntryIterator<K,V>(this); |
3226 |
|
} |
1997 |
– |
} |
1998 |
– |
|
1999 |
– |
static final class SnapshotEntryIterator<K,V> extends ViewIterator<K,V> |
2000 |
– |
implements Iterator<Map.Entry<K,V>> { |
2001 |
– |
SnapshotEntryIterator(ConcurrentHashMapV8<K, V> map) { super(map); } |
3227 |
|
|
3228 |
< |
@SuppressWarnings("unchecked") |
3229 |
< |
public final Map.Entry<K,V> next() { |
3230 |
< |
if (next == null) |
3228 |
> |
@SuppressWarnings("unchecked") public final Map.Entry<K,V> next() { |
3229 |
> |
Object v; |
3230 |
> |
if ((v = nextVal) == null && (v = advance()) == null) |
3231 |
|
throw new NoSuchElementException(); |
3232 |
|
Object k = nextKey; |
3233 |
< |
Object v = nextVal; |
3234 |
< |
advance(); |
2010 |
< |
return new SnapshotEntry<K,V>((K)k, (V)v); |
3233 |
> |
nextVal = null; |
3234 |
> |
return new MapEntry<K,V>((K)k, (V)v, map); |
3235 |
|
} |
3236 |
|
} |
3237 |
|
|
3238 |
|
/** |
3239 |
< |
* Base of writeThrough and Snapshot entry classes |
3239 |
> |
* Exported Entry for iterators |
3240 |
|
*/ |
3241 |
< |
static abstract class MapEntry<K,V> implements Map.Entry<K, V> { |
3241 |
> |
static final class MapEntry<K,V> implements Map.Entry<K, V> { |
3242 |
|
final K key; // non-null |
3243 |
|
V val; // non-null |
3244 |
< |
MapEntry(K key, V val) { this.key = key; this.val = val; } |
3244 |
> |
final ConcurrentHashMapV8<K, V> map; |
3245 |
> |
MapEntry(K key, V val, ConcurrentHashMapV8<K, V> map) { |
3246 |
> |
this.key = key; |
3247 |
> |
this.val = val; |
3248 |
> |
this.map = map; |
3249 |
> |
} |
3250 |
|
public final K getKey() { return key; } |
3251 |
|
public final V getValue() { return val; } |
3252 |
|
public final int hashCode() { return key.hashCode() ^ val.hashCode(); } |
3261 |
|
(v == val || v.equals(val))); |
3262 |
|
} |
3263 |
|
|
2035 |
– |
public abstract V setValue(V value); |
2036 |
– |
} |
2037 |
– |
|
2038 |
– |
/** |
2039 |
– |
* Entry used by EntryIterator.next(), that relays setValue |
2040 |
– |
* changes to the underlying map. |
2041 |
– |
*/ |
2042 |
– |
static final class WriteThroughEntry<K,V> extends MapEntry<K,V> |
2043 |
– |
implements Map.Entry<K, V> { |
2044 |
– |
final ConcurrentHashMapV8<K, V> map; |
2045 |
– |
WriteThroughEntry(K key, V val, ConcurrentHashMapV8<K, V> map) { |
2046 |
– |
super(key, val); |
2047 |
– |
this.map = map; |
2048 |
– |
} |
2049 |
– |
|
3264 |
|
/** |
3265 |
|
* Sets our entry's value and writes through to the map. The |
3266 |
< |
* value to return is somewhat arbitrary here. Since a |
3267 |
< |
* WriteThroughEntry does not necessarily track asynchronous |
3268 |
< |
* changes, the most recent "previous" value could be |
3269 |
< |
* different from what we return (or could even have been |
3270 |
< |
* removed in which case the put will re-establish). We do not |
2057 |
< |
* and cannot guarantee more. |
3266 |
> |
* value to return is somewhat arbitrary here. Since we do not |
3267 |
> |
* necessarily track asynchronous changes, the most recent |
3268 |
> |
* "previous" value could be different from what we return (or |
3269 |
> |
* could even have been removed in which case the put will |
3270 |
> |
* re-establish). We do not and cannot guarantee more. |
3271 |
|
*/ |
3272 |
|
public final V setValue(V value) { |
3273 |
|
if (value == null) throw new NullPointerException(); |
3278 |
|
} |
3279 |
|
} |
3280 |
|
|
3281 |
+ |
/* ---------------- Serialization Support -------------- */ |
3282 |
+ |
|
3283 |
|
/** |
3284 |
< |
* Internal version of entry, that doesn't write though changes |
3284 |
> |
* Stripped-down version of helper class used in previous version, |
3285 |
> |
* declared for the sake of serialization compatibility |
3286 |
|
*/ |
3287 |
< |
static final class SnapshotEntry<K,V> extends MapEntry<K,V> |
3288 |
< |
implements Map.Entry<K, V> { |
3289 |
< |
SnapshotEntry(K key, V val) { super(key, val); } |
3290 |
< |
public final V setValue(V value) { // only locally update |
3291 |
< |
if (value == null) throw new NullPointerException(); |
3292 |
< |
V v = val; |
3293 |
< |
val = value; |
3294 |
< |
return v; |
3287 |
> |
static class Segment<K,V> implements Serializable { |
3288 |
> |
private static final long serialVersionUID = 2249069246763182397L; |
3289 |
> |
final float loadFactor; |
3290 |
> |
Segment(float lf) { this.loadFactor = lf; } |
3291 |
> |
} |
3292 |
> |
|
3293 |
> |
/** |
3294 |
> |
* Saves the state of the {@code ConcurrentHashMapV8} instance to a |
3295 |
> |
* stream (i.e., serializes it). |
3296 |
> |
* @param s the stream |
3297 |
> |
* @serialData |
3298 |
> |
* the key (Object) and value (Object) |
3299 |
> |
* for each key-value mapping, followed by a null pair. |
3300 |
> |
* The key-value mappings are emitted in no particular order. |
3301 |
> |
*/ |
3302 |
> |
@SuppressWarnings("unchecked") private void writeObject(java.io.ObjectOutputStream s) |
3303 |
> |
throws java.io.IOException { |
3304 |
> |
if (segments == null) { // for serialization compatibility |
3305 |
> |
segments = (Segment<K,V>[]) |
3306 |
> |
new Segment<?,?>[DEFAULT_CONCURRENCY_LEVEL]; |
3307 |
> |
for (int i = 0; i < segments.length; ++i) |
3308 |
> |
segments[i] = new Segment<K,V>(LOAD_FACTOR); |
3309 |
> |
} |
3310 |
> |
s.defaultWriteObject(); |
3311 |
> |
Traverser<K,V,Object> it = new Traverser<K,V,Object>(this); |
3312 |
> |
Object v; |
3313 |
> |
while ((v = it.advance()) != null) { |
3314 |
> |
s.writeObject(it.nextKey); |
3315 |
> |
s.writeObject(v); |
3316 |
|
} |
3317 |
+ |
s.writeObject(null); |
3318 |
+ |
s.writeObject(null); |
3319 |
+ |
segments = null; // throw away |
3320 |
+ |
} |
3321 |
+ |
|
3322 |
+ |
/** |
3323 |
+ |
* Reconstitutes the instance from a stream (that is, deserializes it). |
3324 |
+ |
* @param s the stream |
3325 |
+ |
*/ |
3326 |
+ |
@SuppressWarnings("unchecked") private void readObject(java.io.ObjectInputStream s) |
3327 |
+ |
throws java.io.IOException, ClassNotFoundException { |
3328 |
+ |
s.defaultReadObject(); |
3329 |
+ |
this.segments = null; // unneeded |
3330 |
+ |
// initialize transient final field |
3331 |
+ |
UNSAFE.putObjectVolatile(this, counterOffset, new LongAdder()); |
3332 |
+ |
|
3333 |
+ |
// Create all nodes, then place in table once size is known |
3334 |
+ |
long size = 0L; |
3335 |
+ |
Node p = null; |
3336 |
+ |
for (;;) { |
3337 |
+ |
K k = (K) s.readObject(); |
3338 |
+ |
V v = (V) s.readObject(); |
3339 |
+ |
if (k != null && v != null) { |
3340 |
+ |
int h = spread(k.hashCode()); |
3341 |
+ |
p = new Node(h, k, v, p); |
3342 |
+ |
++size; |
3343 |
+ |
} |
3344 |
+ |
else |
3345 |
+ |
break; |
3346 |
+ |
} |
3347 |
+ |
if (p != null) { |
3348 |
+ |
boolean init = false; |
3349 |
+ |
int n; |
3350 |
+ |
if (size >= (long)(MAXIMUM_CAPACITY >>> 1)) |
3351 |
+ |
n = MAXIMUM_CAPACITY; |
3352 |
+ |
else { |
3353 |
+ |
int sz = (int)size; |
3354 |
+ |
n = tableSizeFor(sz + (sz >>> 1) + 1); |
3355 |
+ |
} |
3356 |
+ |
int sc = sizeCtl; |
3357 |
+ |
boolean collide = false; |
3358 |
+ |
if (n > sc && |
3359 |
+ |
UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) { |
3360 |
+ |
try { |
3361 |
+ |
if (table == null) { |
3362 |
+ |
init = true; |
3363 |
+ |
Node[] tab = new Node[n]; |
3364 |
+ |
int mask = n - 1; |
3365 |
+ |
while (p != null) { |
3366 |
+ |
int j = p.hash & mask; |
3367 |
+ |
Node next = p.next; |
3368 |
+ |
Node q = p.next = tabAt(tab, j); |
3369 |
+ |
setTabAt(tab, j, p); |
3370 |
+ |
if (!collide && q != null && q.hash == p.hash) |
3371 |
+ |
collide = true; |
3372 |
+ |
p = next; |
3373 |
+ |
} |
3374 |
+ |
table = tab; |
3375 |
+ |
counter.add(size); |
3376 |
+ |
sc = n - (n >>> 2); |
3377 |
+ |
} |
3378 |
+ |
} finally { |
3379 |
+ |
sizeCtl = sc; |
3380 |
+ |
} |
3381 |
+ |
if (collide) { // rescan and convert to TreeBins |
3382 |
+ |
Node[] tab = table; |
3383 |
+ |
for (int i = 0; i < tab.length; ++i) { |
3384 |
+ |
int c = 0; |
3385 |
+ |
for (Node e = tabAt(tab, i); e != null; e = e.next) { |
3386 |
+ |
if (++c > TREE_THRESHOLD && |
3387 |
+ |
(e.key instanceof Comparable)) { |
3388 |
+ |
replaceWithTreeBin(tab, i, e.key); |
3389 |
+ |
break; |
3390 |
+ |
} |
3391 |
+ |
} |
3392 |
+ |
} |
3393 |
+ |
} |
3394 |
+ |
} |
3395 |
+ |
if (!init) { // Can only happen if unsafely published. |
3396 |
+ |
while (p != null) { |
3397 |
+ |
internalPut(p.key, p.val); |
3398 |
+ |
p = p.next; |
3399 |
+ |
} |
3400 |
+ |
} |
3401 |
+ |
} |
3402 |
+ |
} |
3403 |
+ |
|
3404 |
+ |
|
3405 |
+ |
// ------------------------------------------------------- |
3406 |
+ |
|
3407 |
+ |
// Sams |
3408 |
+ |
/** Interface describing a void action of one argument */ |
3409 |
+ |
public interface Action<A> { void apply(A a); } |
3410 |
+ |
/** Interface describing a void action of two arguments */ |
3411 |
+ |
public interface BiAction<A,B> { void apply(A a, B b); } |
3412 |
+ |
/** Interface describing a function of one argument */ |
3413 |
+ |
public interface Fun<A,T> { T apply(A a); } |
3414 |
+ |
/** Interface describing a function of two arguments */ |
3415 |
+ |
public interface BiFun<A,B,T> { T apply(A a, B b); } |
3416 |
+ |
/** Interface describing a function of no arguments */ |
3417 |
+ |
public interface Generator<T> { T apply(); } |
3418 |
+ |
/** Interface describing a function mapping its argument to a double */ |
3419 |
+ |
public interface ObjectToDouble<A> { double apply(A a); } |
3420 |
+ |
/** Interface describing a function mapping its argument to a long */ |
3421 |
+ |
public interface ObjectToLong<A> { long apply(A a); } |
3422 |
+ |
/** Interface describing a function mapping its argument to an int */ |
3423 |
+ |
public interface ObjectToInt<A> {int apply(A a); } |
3424 |
+ |
/** Interface describing a function mapping two arguments to a double */ |
3425 |
+ |
public interface ObjectByObjectToDouble<A,B> { double apply(A a, B b); } |
3426 |
+ |
/** Interface describing a function mapping two arguments to a long */ |
3427 |
+ |
public interface ObjectByObjectToLong<A,B> { long apply(A a, B b); } |
3428 |
+ |
/** Interface describing a function mapping two arguments to an int */ |
3429 |
+ |
public interface ObjectByObjectToInt<A,B> {int apply(A a, B b); } |
3430 |
+ |
/** Interface describing a function mapping a double to a double */ |
3431 |
+ |
public interface DoubleToDouble { double apply(double a); } |
3432 |
+ |
/** Interface describing a function mapping a long to a long */ |
3433 |
+ |
public interface LongToLong { long apply(long a); } |
3434 |
+ |
/** Interface describing a function mapping an int to an int */ |
3435 |
+ |
public interface IntToInt { int apply(int a); } |
3436 |
+ |
/** Interface describing a function mapping two doubles to a double */ |
3437 |
+ |
public interface DoubleByDoubleToDouble { double apply(double a, double b); } |
3438 |
+ |
/** Interface describing a function mapping two longs to a long */ |
3439 |
+ |
public interface LongByLongToLong { long apply(long a, long b); } |
3440 |
+ |
/** Interface describing a function mapping two ints to an int */ |
3441 |
+ |
public interface IntByIntToInt { int apply(int a, int b); } |
3442 |
+ |
|
3443 |
+ |
|
3444 |
+ |
// ------------------------------------------------------- |
3445 |
+ |
|
3446 |
+ |
/** |
3447 |
+ |
* Performs the given action for each (key, value). |
3448 |
+ |
* |
3449 |
+ |
* @param action the action |
3450 |
+ |
*/ |
3451 |
+ |
public void forEach(BiAction<K,V> action) { |
3452 |
+ |
ForkJoinTasks.forEach |
3453 |
+ |
(this, action).invoke(); |
3454 |
+ |
} |
3455 |
+ |
|
3456 |
+ |
/** |
3457 |
+ |
* Performs the given action for each non-null transformation |
3458 |
+ |
* of each (key, value). |
3459 |
+ |
* |
3460 |
+ |
* @param transformer a function returning the transformation |
3461 |
+ |
* for an element, or null of there is no transformation (in |
3462 |
+ |
* which case the action is not applied). |
3463 |
+ |
* @param action the action |
3464 |
+ |
*/ |
3465 |
+ |
public <U> void forEach(BiFun<? super K, ? super V, ? extends U> transformer, |
3466 |
+ |
Action<U> action) { |
3467 |
+ |
ForkJoinTasks.forEach |
3468 |
+ |
(this, transformer, action).invoke(); |
3469 |
+ |
} |
3470 |
+ |
|
3471 |
+ |
/** |
3472 |
+ |
* Returns a non-null result from applying the given search |
3473 |
+ |
* function on each (key, value), or null if none. Upon |
3474 |
+ |
* success, further element processing is suppressed and the |
3475 |
+ |
* results of any other parallel invocations of the search |
3476 |
+ |
* function are ignored. |
3477 |
+ |
* |
3478 |
+ |
* @param searchFunction a function returning a non-null |
3479 |
+ |
* result on success, else null |
3480 |
+ |
* @return a non-null result from applying the given search |
3481 |
+ |
* function on each (key, value), or null if none |
3482 |
+ |
*/ |
3483 |
+ |
public <U> U search(BiFun<? super K, ? super V, ? extends U> searchFunction) { |
3484 |
+ |
return ForkJoinTasks.search |
3485 |
+ |
(this, searchFunction).invoke(); |
3486 |
+ |
} |
3487 |
+ |
|
3488 |
+ |
/** |
3489 |
+ |
* Returns the result of accumulating the given transformation |
3490 |
+ |
* of all (key, value) pairs using the given reducer to |
3491 |
+ |
* combine values, or null if none. |
3492 |
+ |
* |
3493 |
+ |
* @param transformer a function returning the transformation |
3494 |
+ |
* for an element, or null of there is no transformation (in |
3495 |
+ |
* which case it is not combined). |
3496 |
+ |
* @param reducer a commutative associative combining function |
3497 |
+ |
* @return the result of accumulating the given transformation |
3498 |
+ |
* of all (key, value) pairs |
3499 |
+ |
*/ |
3500 |
+ |
public <U> U reduce(BiFun<? super K, ? super V, ? extends U> transformer, |
3501 |
+ |
BiFun<? super U, ? super U, ? extends U> reducer) { |
3502 |
+ |
return ForkJoinTasks.reduce |
3503 |
+ |
(this, transformer, reducer).invoke(); |
3504 |
+ |
} |
3505 |
+ |
|
3506 |
+ |
/** |
3507 |
+ |
* Returns the result of accumulating the given transformation |
3508 |
+ |
* of all (key, value) pairs using the given reducer to |
3509 |
+ |
* combine values, and the given basis as an identity value. |
3510 |
+ |
* |
3511 |
+ |
* @param transformer a function returning the transformation |
3512 |
+ |
* for an element |
3513 |
+ |
* @param basis the identity (initial default value) for the reduction |
3514 |
+ |
* @param reducer a commutative associative combining function |
3515 |
+ |
* @return the result of accumulating the given transformation |
3516 |
+ |
* of all (key, value) pairs |
3517 |
+ |
*/ |
3518 |
+ |
public double reduceToDouble(ObjectByObjectToDouble<? super K, ? super V> transformer, |
3519 |
+ |
double basis, |
3520 |
+ |
DoubleByDoubleToDouble reducer) { |
3521 |
+ |
return ForkJoinTasks.reduceToDouble |
3522 |
+ |
(this, transformer, basis, reducer).invoke(); |
3523 |
+ |
} |
3524 |
+ |
|
3525 |
+ |
/** |
3526 |
+ |
* Returns the result of accumulating the given transformation |
3527 |
+ |
* of all (key, value) pairs using the given reducer to |
3528 |
+ |
* combine values, and the given basis as an identity value. |
3529 |
+ |
* |
3530 |
+ |
* @param transformer a function returning the transformation |
3531 |
+ |
* for an element |
3532 |
+ |
* @param basis the identity (initial default value) for the reduction |
3533 |
+ |
* @param reducer a commutative associative combining function |
3534 |
+ |
* @return the result of accumulating the given transformation |
3535 |
+ |
* of all (key, value) pairs |
3536 |
+ |
*/ |
3537 |
+ |
public long reduceToLong(ObjectByObjectToLong<? super K, ? super V> transformer, |
3538 |
+ |
long basis, |
3539 |
+ |
LongByLongToLong reducer) { |
3540 |
+ |
return ForkJoinTasks.reduceToLong |
3541 |
+ |
(this, transformer, basis, reducer).invoke(); |
3542 |
+ |
} |
3543 |
+ |
|
3544 |
+ |
/** |
3545 |
+ |
* Returns the result of accumulating the given transformation |
3546 |
+ |
* of all (key, value) pairs using the given reducer to |
3547 |
+ |
* combine values, and the given basis as an identity value. |
3548 |
+ |
* |
3549 |
+ |
* @param transformer a function returning the transformation |
3550 |
+ |
* for an element |
3551 |
+ |
* @param basis the identity (initial default value) for the reduction |
3552 |
+ |
* @param reducer a commutative associative combining function |
3553 |
+ |
* @return the result of accumulating the given transformation |
3554 |
+ |
* of all (key, value) pairs |
3555 |
+ |
*/ |
3556 |
+ |
public int reduceToInt(ObjectByObjectToInt<? super K, ? super V> transformer, |
3557 |
+ |
int basis, |
3558 |
+ |
IntByIntToInt reducer) { |
3559 |
+ |
return ForkJoinTasks.reduceToInt |
3560 |
+ |
(this, transformer, basis, reducer).invoke(); |
3561 |
+ |
} |
3562 |
+ |
|
3563 |
+ |
/** |
3564 |
+ |
* Performs the given action for each key. |
3565 |
+ |
* |
3566 |
+ |
* @param action the action |
3567 |
+ |
*/ |
3568 |
+ |
public void forEachKey(Action<K> action) { |
3569 |
+ |
ForkJoinTasks.forEachKey |
3570 |
+ |
(this, action).invoke(); |
3571 |
+ |
} |
3572 |
+ |
|
3573 |
+ |
/** |
3574 |
+ |
* Performs the given action for each non-null transformation |
3575 |
+ |
* of each key. |
3576 |
+ |
* |
3577 |
+ |
* @param transformer a function returning the transformation |
3578 |
+ |
* for an element, or null of there is no transformation (in |
3579 |
+ |
* which case the action is not applied). |
3580 |
+ |
* @param action the action |
3581 |
+ |
*/ |
3582 |
+ |
public <U> void forEachKey(Fun<? super K, ? extends U> transformer, |
3583 |
+ |
Action<U> action) { |
3584 |
+ |
ForkJoinTasks.forEachKey |
3585 |
+ |
(this, transformer, action).invoke(); |
3586 |
+ |
} |
3587 |
+ |
|
3588 |
+ |
/** |
3589 |
+ |
* Returns a non-null result from applying the given search |
3590 |
+ |
* function on each key, or null if none. Upon success, |
3591 |
+ |
* further element processing is suppressed and the results of |
3592 |
+ |
* any other parallel invocations of the search function are |
3593 |
+ |
* ignored. |
3594 |
+ |
* |
3595 |
+ |
* @param searchFunction a function returning a non-null |
3596 |
+ |
* result on success, else null |
3597 |
+ |
* @return a non-null result from applying the given search |
3598 |
+ |
* function on each key, or null if none |
3599 |
+ |
*/ |
3600 |
+ |
public <U> U searchKeys(Fun<? super K, ? extends U> searchFunction) { |
3601 |
+ |
return ForkJoinTasks.searchKeys |
3602 |
+ |
(this, searchFunction).invoke(); |
3603 |
+ |
} |
3604 |
+ |
|
3605 |
+ |
/** |
3606 |
+ |
* Returns the result of accumulating all keys using the given |
3607 |
+ |
* reducer to combine values, or null if none. |
3608 |
+ |
* |
3609 |
+ |
* @param reducer a commutative associative combining function |
3610 |
+ |
* @return the result of accumulating all keys using the given |
3611 |
+ |
* reducer to combine values, or null if none |
3612 |
+ |
*/ |
3613 |
+ |
public K reduceKeys(BiFun<? super K, ? super K, ? extends K> reducer) { |
3614 |
+ |
return ForkJoinTasks.reduceKeys |
3615 |
+ |
(this, reducer).invoke(); |
3616 |
+ |
} |
3617 |
+ |
|
3618 |
+ |
/** |
3619 |
+ |
* Returns the result of accumulating the given transformation |
3620 |
+ |
* of all keys using the given reducer to combine values, or |
3621 |
+ |
* null if none. |
3622 |
+ |
* |
3623 |
+ |
* @param transformer a function returning the transformation |
3624 |
+ |
* for an element, or null of there is no transformation (in |
3625 |
+ |
* which case it is not combined). |
3626 |
+ |
* @param reducer a commutative associative combining function |
3627 |
+ |
* @return the result of accumulating the given transformation |
3628 |
+ |
* of all keys |
3629 |
+ |
*/ |
3630 |
+ |
public <U> U reduceKeys(Fun<? super K, ? extends U> transformer, |
3631 |
+ |
BiFun<? super U, ? super U, ? extends U> reducer) { |
3632 |
+ |
return ForkJoinTasks.reduceKeys |
3633 |
+ |
(this, transformer, reducer).invoke(); |
3634 |
+ |
} |
3635 |
+ |
|
3636 |
+ |
/** |
3637 |
+ |
* Returns the result of accumulating the given transformation |
3638 |
+ |
* of all keys using the given reducer to combine values, and |
3639 |
+ |
* the given basis as an identity value. |
3640 |
+ |
* |
3641 |
+ |
* @param transformer a function returning the transformation |
3642 |
+ |
* for an element |
3643 |
+ |
* @param basis the identity (initial default value) for the reduction |
3644 |
+ |
* @param reducer a commutative associative combining function |
3645 |
+ |
* @return the result of accumulating the given transformation |
3646 |
+ |
* of all keys |
3647 |
+ |
*/ |
3648 |
+ |
public double reduceKeysToDouble(ObjectToDouble<? super K> transformer, |
3649 |
+ |
double basis, |
3650 |
+ |
DoubleByDoubleToDouble reducer) { |
3651 |
+ |
return ForkJoinTasks.reduceKeysToDouble |
3652 |
+ |
(this, transformer, basis, reducer).invoke(); |
3653 |
+ |
} |
3654 |
+ |
|
3655 |
+ |
/** |
3656 |
+ |
* Returns the result of accumulating the given transformation |
3657 |
+ |
* of all keys using the given reducer to combine values, and |
3658 |
+ |
* the given basis as an identity value. |
3659 |
+ |
* |
3660 |
+ |
* @param transformer a function returning the transformation |
3661 |
+ |
* for an element |
3662 |
+ |
* @param basis the identity (initial default value) for the reduction |
3663 |
+ |
* @param reducer a commutative associative combining function |
3664 |
+ |
* @return the result of accumulating the given transformation |
3665 |
+ |
* of all keys |
3666 |
+ |
*/ |
3667 |
+ |
public long reduceKeysToLong(ObjectToLong<? super K> transformer, |
3668 |
+ |
long basis, |
3669 |
+ |
LongByLongToLong reducer) { |
3670 |
+ |
return ForkJoinTasks.reduceKeysToLong |
3671 |
+ |
(this, transformer, basis, reducer).invoke(); |
3672 |
+ |
} |
3673 |
+ |
|
3674 |
+ |
/** |
3675 |
+ |
* Returns the result of accumulating the given transformation |
3676 |
+ |
* of all keys using the given reducer to combine values, and |
3677 |
+ |
* the given basis as an identity value. |
3678 |
+ |
* |
3679 |
+ |
* @param transformer a function returning the transformation |
3680 |
+ |
* for an element |
3681 |
+ |
* @param basis the identity (initial default value) for the reduction |
3682 |
+ |
* @param reducer a commutative associative combining function |
3683 |
+ |
* @return the result of accumulating the given transformation |
3684 |
+ |
* of all keys |
3685 |
+ |
*/ |
3686 |
+ |
public int reduceKeysToInt(ObjectToInt<? super K> transformer, |
3687 |
+ |
int basis, |
3688 |
+ |
IntByIntToInt reducer) { |
3689 |
+ |
return ForkJoinTasks.reduceKeysToInt |
3690 |
+ |
(this, transformer, basis, reducer).invoke(); |
3691 |
+ |
} |
3692 |
+ |
|
3693 |
+ |
/** |
3694 |
+ |
* Performs the given action for each value. |
3695 |
+ |
* |
3696 |
+ |
* @param action the action |
3697 |
+ |
*/ |
3698 |
+ |
public void forEachValue(Action<V> action) { |
3699 |
+ |
ForkJoinTasks.forEachValue |
3700 |
+ |
(this, action).invoke(); |
3701 |
+ |
} |
3702 |
+ |
|
3703 |
+ |
/** |
3704 |
+ |
* Performs the given action for each non-null transformation |
3705 |
+ |
* of each value. |
3706 |
+ |
* |
3707 |
+ |
* @param transformer a function returning the transformation |
3708 |
+ |
* for an element, or null of there is no transformation (in |
3709 |
+ |
* which case the action is not applied). |
3710 |
+ |
*/ |
3711 |
+ |
public <U> void forEachValue(Fun<? super V, ? extends U> transformer, |
3712 |
+ |
Action<U> action) { |
3713 |
+ |
ForkJoinTasks.forEachValue |
3714 |
+ |
(this, transformer, action).invoke(); |
3715 |
+ |
} |
3716 |
+ |
|
3717 |
+ |
/** |
3718 |
+ |
* Returns a non-null result from applying the given search |
3719 |
+ |
* function on each value, or null if none. Upon success, |
3720 |
+ |
* further element processing is suppressed and the results of |
3721 |
+ |
* any other parallel invocations of the search function are |
3722 |
+ |
* ignored. |
3723 |
+ |
* |
3724 |
+ |
* @param searchFunction a function returning a non-null |
3725 |
+ |
* result on success, else null |
3726 |
+ |
* @return a non-null result from applying the given search |
3727 |
+ |
* function on each value, or null if none |
3728 |
+ |
* |
3729 |
+ |
*/ |
3730 |
+ |
public <U> U searchValues(Fun<? super V, ? extends U> searchFunction) { |
3731 |
+ |
return ForkJoinTasks.searchValues |
3732 |
+ |
(this, searchFunction).invoke(); |
3733 |
+ |
} |
3734 |
+ |
|
3735 |
+ |
/** |
3736 |
+ |
* Returns the result of accumulating all values using the |
3737 |
+ |
* given reducer to combine values, or null if none. |
3738 |
+ |
* |
3739 |
+ |
* @param reducer a commutative associative combining function |
3740 |
+ |
* @return the result of accumulating all values |
3741 |
+ |
*/ |
3742 |
+ |
public V reduceValues(BiFun<? super V, ? super V, ? extends V> reducer) { |
3743 |
+ |
return ForkJoinTasks.reduceValues |
3744 |
+ |
(this, reducer).invoke(); |
3745 |
+ |
} |
3746 |
+ |
|
3747 |
+ |
/** |
3748 |
+ |
* Returns the result of accumulating the given transformation |
3749 |
+ |
* of all values using the given reducer to combine values, or |
3750 |
+ |
* null if none. |
3751 |
+ |
* |
3752 |
+ |
* @param transformer a function returning the transformation |
3753 |
+ |
* for an element, or null of there is no transformation (in |
3754 |
+ |
* which case it is not combined). |
3755 |
+ |
* @param reducer a commutative associative combining function |
3756 |
+ |
* @return the result of accumulating the given transformation |
3757 |
+ |
* of all values |
3758 |
+ |
*/ |
3759 |
+ |
public <U> U reduceValues(Fun<? super V, ? extends U> transformer, |
3760 |
+ |
BiFun<? super U, ? super U, ? extends U> reducer) { |
3761 |
+ |
return ForkJoinTasks.reduceValues |
3762 |
+ |
(this, transformer, reducer).invoke(); |
3763 |
+ |
} |
3764 |
+ |
|
3765 |
+ |
/** |
3766 |
+ |
* Returns the result of accumulating the given transformation |
3767 |
+ |
* of all values using the given reducer to combine values, |
3768 |
+ |
* and the given basis as an identity value. |
3769 |
+ |
* |
3770 |
+ |
* @param transformer a function returning the transformation |
3771 |
+ |
* for an element |
3772 |
+ |
* @param basis the identity (initial default value) for the reduction |
3773 |
+ |
* @param reducer a commutative associative combining function |
3774 |
+ |
* @return the result of accumulating the given transformation |
3775 |
+ |
* of all values |
3776 |
+ |
*/ |
3777 |
+ |
public double reduceValuesToDouble(ObjectToDouble<? super V> transformer, |
3778 |
+ |
double basis, |
3779 |
+ |
DoubleByDoubleToDouble reducer) { |
3780 |
+ |
return ForkJoinTasks.reduceValuesToDouble |
3781 |
+ |
(this, transformer, basis, reducer).invoke(); |
3782 |
+ |
} |
3783 |
+ |
|
3784 |
+ |
/** |
3785 |
+ |
* Returns the result of accumulating the given transformation |
3786 |
+ |
* of all values using the given reducer to combine values, |
3787 |
+ |
* and the given basis as an identity value. |
3788 |
+ |
* |
3789 |
+ |
* @param transformer a function returning the transformation |
3790 |
+ |
* for an element |
3791 |
+ |
* @param basis the identity (initial default value) for the reduction |
3792 |
+ |
* @param reducer a commutative associative combining function |
3793 |
+ |
* @return the result of accumulating the given transformation |
3794 |
+ |
* of all values |
3795 |
+ |
*/ |
3796 |
+ |
public long reduceValuesToLong(ObjectToLong<? super V> transformer, |
3797 |
+ |
long basis, |
3798 |
+ |
LongByLongToLong reducer) { |
3799 |
+ |
return ForkJoinTasks.reduceValuesToLong |
3800 |
+ |
(this, transformer, basis, reducer).invoke(); |
3801 |
+ |
} |
3802 |
+ |
|
3803 |
+ |
/** |
3804 |
+ |
* Returns the result of accumulating the given transformation |
3805 |
+ |
* of all values using the given reducer to combine values, |
3806 |
+ |
* and the given basis as an identity value. |
3807 |
+ |
* |
3808 |
+ |
* @param transformer a function returning the transformation |
3809 |
+ |
* for an element |
3810 |
+ |
* @param basis the identity (initial default value) for the reduction |
3811 |
+ |
* @param reducer a commutative associative combining function |
3812 |
+ |
* @return the result of accumulating the given transformation |
3813 |
+ |
* of all values |
3814 |
+ |
*/ |
3815 |
+ |
public int reduceValuesToInt(ObjectToInt<? super V> transformer, |
3816 |
+ |
int basis, |
3817 |
+ |
IntByIntToInt reducer) { |
3818 |
+ |
return ForkJoinTasks.reduceValuesToInt |
3819 |
+ |
(this, transformer, basis, reducer).invoke(); |
3820 |
+ |
} |
3821 |
+ |
|
3822 |
+ |
/** |
3823 |
+ |
* Performs the given action for each entry. |
3824 |
+ |
* |
3825 |
+ |
* @param action the action |
3826 |
+ |
*/ |
3827 |
+ |
public void forEachEntry(Action<Map.Entry<K,V>> action) { |
3828 |
+ |
ForkJoinTasks.forEachEntry |
3829 |
+ |
(this, action).invoke(); |
3830 |
+ |
} |
3831 |
+ |
|
3832 |
+ |
/** |
3833 |
+ |
* Performs the given action for each non-null transformation |
3834 |
+ |
* of each entry. |
3835 |
+ |
* |
3836 |
+ |
* @param transformer a function returning the transformation |
3837 |
+ |
* for an element, or null of there is no transformation (in |
3838 |
+ |
* which case the action is not applied). |
3839 |
+ |
* @param action the action |
3840 |
+ |
*/ |
3841 |
+ |
public <U> void forEachEntry(Fun<Map.Entry<K,V>, ? extends U> transformer, |
3842 |
+ |
Action<U> action) { |
3843 |
+ |
ForkJoinTasks.forEachEntry |
3844 |
+ |
(this, transformer, action).invoke(); |
3845 |
+ |
} |
3846 |
+ |
|
3847 |
+ |
/** |
3848 |
+ |
* Returns a non-null result from applying the given search |
3849 |
+ |
* function on each entry, or null if none. Upon success, |
3850 |
+ |
* further element processing is suppressed and the results of |
3851 |
+ |
* any other parallel invocations of the search function are |
3852 |
+ |
* ignored. |
3853 |
+ |
* |
3854 |
+ |
* @param searchFunction a function returning a non-null |
3855 |
+ |
* result on success, else null |
3856 |
+ |
* @return a non-null result from applying the given search |
3857 |
+ |
* function on each entry, or null if none |
3858 |
+ |
*/ |
3859 |
+ |
public <U> U searchEntries(Fun<Map.Entry<K,V>, ? extends U> searchFunction) { |
3860 |
+ |
return ForkJoinTasks.searchEntries |
3861 |
+ |
(this, searchFunction).invoke(); |
3862 |
+ |
} |
3863 |
+ |
|
3864 |
+ |
/** |
3865 |
+ |
* Returns the result of accumulating all entries using the |
3866 |
+ |
* given reducer to combine values, or null if none. |
3867 |
+ |
* |
3868 |
+ |
* @param reducer a commutative associative combining function |
3869 |
+ |
* @return the result of accumulating all entries |
3870 |
+ |
*/ |
3871 |
+ |
public Map.Entry<K,V> reduceEntries(BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) { |
3872 |
+ |
return ForkJoinTasks.reduceEntries |
3873 |
+ |
(this, reducer).invoke(); |
3874 |
+ |
} |
3875 |
+ |
|
3876 |
+ |
/** |
3877 |
+ |
* Returns the result of accumulating the given transformation |
3878 |
+ |
* of all entries using the given reducer to combine values, |
3879 |
+ |
* or null if none. |
3880 |
+ |
* |
3881 |
+ |
* @param transformer a function returning the transformation |
3882 |
+ |
* for an element, or null of there is no transformation (in |
3883 |
+ |
* which case it is not combined). |
3884 |
+ |
* @param reducer a commutative associative combining function |
3885 |
+ |
* @return the result of accumulating the given transformation |
3886 |
+ |
* of all entries |
3887 |
+ |
*/ |
3888 |
+ |
public <U> U reduceEntries(Fun<Map.Entry<K,V>, ? extends U> transformer, |
3889 |
+ |
BiFun<? super U, ? super U, ? extends U> reducer) { |
3890 |
+ |
return ForkJoinTasks.reduceEntries |
3891 |
+ |
(this, transformer, reducer).invoke(); |
3892 |
+ |
} |
3893 |
+ |
|
3894 |
+ |
/** |
3895 |
+ |
* Returns the result of accumulating the given transformation |
3896 |
+ |
* of all entries using the given reducer to combine values, |
3897 |
+ |
* and the given basis as an identity value. |
3898 |
+ |
* |
3899 |
+ |
* @param transformer a function returning the transformation |
3900 |
+ |
* for an element |
3901 |
+ |
* @param basis the identity (initial default value) for the reduction |
3902 |
+ |
* @param reducer a commutative associative combining function |
3903 |
+ |
* @return the result of accumulating the given transformation |
3904 |
+ |
* of all entries |
3905 |
+ |
*/ |
3906 |
+ |
public double reduceEntriesToDouble(ObjectToDouble<Map.Entry<K,V>> transformer, |
3907 |
+ |
double basis, |
3908 |
+ |
DoubleByDoubleToDouble reducer) { |
3909 |
+ |
return ForkJoinTasks.reduceEntriesToDouble |
3910 |
+ |
(this, transformer, basis, reducer).invoke(); |
3911 |
+ |
} |
3912 |
+ |
|
3913 |
+ |
/** |
3914 |
+ |
* Returns the result of accumulating the given transformation |
3915 |
+ |
* of all entries using the given reducer to combine values, |
3916 |
+ |
* and the given basis as an identity value. |
3917 |
+ |
* |
3918 |
+ |
* @param transformer a function returning the transformation |
3919 |
+ |
* for an element |
3920 |
+ |
* @param basis the identity (initial default value) for the reduction |
3921 |
+ |
* @param reducer a commutative associative combining function |
3922 |
+ |
* @return the result of accumulating the given transformation |
3923 |
+ |
* of all entries |
3924 |
+ |
*/ |
3925 |
+ |
public long reduceEntriesToLong(ObjectToLong<Map.Entry<K,V>> transformer, |
3926 |
+ |
long basis, |
3927 |
+ |
LongByLongToLong reducer) { |
3928 |
+ |
return ForkJoinTasks.reduceEntriesToLong |
3929 |
+ |
(this, transformer, basis, reducer).invoke(); |
3930 |
+ |
} |
3931 |
+ |
|
3932 |
+ |
/** |
3933 |
+ |
* Returns the result of accumulating the given transformation |
3934 |
+ |
* of all entries using the given reducer to combine values, |
3935 |
+ |
* and the given basis as an identity value. |
3936 |
+ |
* |
3937 |
+ |
* @param transformer a function returning the transformation |
3938 |
+ |
* for an element |
3939 |
+ |
* @param basis the identity (initial default value) for the reduction |
3940 |
+ |
* @param reducer a commutative associative combining function |
3941 |
+ |
* @return the result of accumulating the given transformation |
3942 |
+ |
* of all entries |
3943 |
+ |
*/ |
3944 |
+ |
public int reduceEntriesToInt(ObjectToInt<Map.Entry<K,V>> transformer, |
3945 |
+ |
int basis, |
3946 |
+ |
IntByIntToInt reducer) { |
3947 |
+ |
return ForkJoinTasks.reduceEntriesToInt |
3948 |
+ |
(this, transformer, basis, reducer).invoke(); |
3949 |
|
} |
3950 |
|
|
3951 |
|
/* ----------------Views -------------- */ |
3952 |
|
|
3953 |
|
/** |
3954 |
< |
* Base class for views. This is done mainly to allow adding |
2086 |
< |
* customized parallel traversals (not yet implemented.) |
3954 |
> |
* Base class for views. |
3955 |
|
*/ |
3956 |
< |
static abstract class MapView<K, V> { |
3956 |
> |
static abstract class CHMView<K, V> { |
3957 |
|
final ConcurrentHashMapV8<K, V> map; |
3958 |
< |
MapView(ConcurrentHashMapV8<K, V> map) { this.map = map; } |
3958 |
> |
CHMView(ConcurrentHashMapV8<K, V> map) { this.map = map; } |
3959 |
> |
|
3960 |
> |
/** |
3961 |
> |
* Returns the map backing this view. |
3962 |
> |
* |
3963 |
> |
* @return the map backing this view |
3964 |
> |
*/ |
3965 |
> |
public ConcurrentHashMapV8<K,V> getMap() { return map; } |
3966 |
> |
|
3967 |
|
public final int size() { return map.size(); } |
3968 |
|
public final boolean isEmpty() { return map.isEmpty(); } |
3969 |
|
public final void clear() { map.clear(); } |
3970 |
|
|
3971 |
|
// implementations below rely on concrete classes supplying these |
3972 |
< |
abstract Iterator<?> iter(); |
3972 |
> |
abstract public Iterator<?> iterator(); |
3973 |
|
abstract public boolean contains(Object o); |
3974 |
|
abstract public boolean remove(Object o); |
3975 |
|
|
3976 |
|
private static final String oomeMsg = "Required array size too large"; |
3977 |
|
|
3978 |
|
public final Object[] toArray() { |
3979 |
< |
long sz = map.longSize(); |
3979 |
> |
long sz = map.mappingCount(); |
3980 |
|
if (sz > (long)(MAX_ARRAY_SIZE)) |
3981 |
|
throw new OutOfMemoryError(oomeMsg); |
3982 |
|
int n = (int)sz; |
3983 |
|
Object[] r = new Object[n]; |
3984 |
|
int i = 0; |
3985 |
< |
Iterator<?> it = iter(); |
3985 |
> |
Iterator<?> it = iterator(); |
3986 |
|
while (it.hasNext()) { |
3987 |
|
if (i == n) { |
3988 |
|
if (n >= MAX_ARRAY_SIZE) |
3998 |
|
return (i == n) ? r : Arrays.copyOf(r, i); |
3999 |
|
} |
4000 |
|
|
4001 |
< |
@SuppressWarnings("unchecked") |
4002 |
< |
public final <T> T[] toArray(T[] a) { |
2127 |
< |
long sz = map.longSize(); |
4001 |
> |
@SuppressWarnings("unchecked") public final <T> T[] toArray(T[] a) { |
4002 |
> |
long sz = map.mappingCount(); |
4003 |
|
if (sz > (long)(MAX_ARRAY_SIZE)) |
4004 |
|
throw new OutOfMemoryError(oomeMsg); |
4005 |
|
int m = (int)sz; |
4008 |
|
.newInstance(a.getClass().getComponentType(), m); |
4009 |
|
int n = r.length; |
4010 |
|
int i = 0; |
4011 |
< |
Iterator<?> it = iter(); |
4011 |
> |
Iterator<?> it = iterator(); |
4012 |
|
while (it.hasNext()) { |
4013 |
|
if (i == n) { |
4014 |
|
if (n >= MAX_ARRAY_SIZE) |
4030 |
|
|
4031 |
|
public final int hashCode() { |
4032 |
|
int h = 0; |
4033 |
< |
for (Iterator<?> it = iter(); it.hasNext();) |
4033 |
> |
for (Iterator<?> it = iterator(); it.hasNext();) |
4034 |
|
h += it.next().hashCode(); |
4035 |
|
return h; |
4036 |
|
} |
4038 |
|
public final String toString() { |
4039 |
|
StringBuilder sb = new StringBuilder(); |
4040 |
|
sb.append('['); |
4041 |
< |
Iterator<?> it = iter(); |
4041 |
> |
Iterator<?> it = iterator(); |
4042 |
|
if (it.hasNext()) { |
4043 |
|
for (;;) { |
4044 |
|
Object e = it.next(); |
4064 |
|
|
4065 |
|
public final boolean removeAll(Collection<?> c) { |
4066 |
|
boolean modified = false; |
4067 |
< |
for (Iterator<?> it = iter(); it.hasNext();) { |
4067 |
> |
for (Iterator<?> it = iterator(); it.hasNext();) { |
4068 |
|
if (c.contains(it.next())) { |
4069 |
|
it.remove(); |
4070 |
|
modified = true; |
4075 |
|
|
4076 |
|
public final boolean retainAll(Collection<?> c) { |
4077 |
|
boolean modified = false; |
4078 |
< |
for (Iterator<?> it = iter(); it.hasNext();) { |
4078 |
> |
for (Iterator<?> it = iterator(); it.hasNext();) { |
4079 |
|
if (!c.contains(it.next())) { |
4080 |
|
it.remove(); |
4081 |
|
modified = true; |
4086 |
|
|
4087 |
|
} |
4088 |
|
|
4089 |
< |
static final class KeySet<K,V> extends MapView<K,V> implements Set<K> { |
4090 |
< |
KeySet(ConcurrentHashMapV8<K, V> map) { super(map); } |
4091 |
< |
public final boolean contains(Object o) { return map.containsKey(o); } |
4092 |
< |
public final boolean remove(Object o) { return map.remove(o) != null; } |
4093 |
< |
|
4094 |
< |
public final Iterator<K> iterator() { |
4095 |
< |
return new KeyIterator<K,V>(map); |
4096 |
< |
} |
4097 |
< |
final Iterator<?> iter() { |
4098 |
< |
return new KeyIterator<K,V>(map); |
4099 |
< |
} |
4100 |
< |
public final boolean add(K e) { |
4101 |
< |
throw new UnsupportedOperationException(); |
4089 |
> |
/** |
4090 |
> |
* A view of a ConcurrentHashMapV8 as a {@link Set} of keys, in |
4091 |
> |
* which additions may optionally be enabled by mapping to a |
4092 |
> |
* common value. This class cannot be directly instantiated. See |
4093 |
> |
* {@link #keySet}, {@link #keySet(Object)}, {@link #newKeySet()}, |
4094 |
> |
* {@link #newKeySet(int)}. |
4095 |
> |
*/ |
4096 |
> |
public static class KeySetView<K,V> extends CHMView<K,V> implements Set<K>, java.io.Serializable { |
4097 |
> |
private static final long serialVersionUID = 7249069246763182397L; |
4098 |
> |
private final V value; |
4099 |
> |
KeySetView(ConcurrentHashMapV8<K, V> map, V value) { // non-public |
4100 |
> |
super(map); |
4101 |
> |
this.value = value; |
4102 |
|
} |
4103 |
< |
public final boolean addAll(Collection<? extends K> c) { |
4104 |
< |
throw new UnsupportedOperationException(); |
4103 |
> |
|
4104 |
> |
/** |
4105 |
> |
* Returns the default mapped value for additions, |
4106 |
> |
* or {@code null} if additions are not supported. |
4107 |
> |
* |
4108 |
> |
* @return the default mapped value for additions, or {@code null} |
4109 |
> |
* if not supported. |
4110 |
> |
*/ |
4111 |
> |
public V getMappedValue() { return value; } |
4112 |
> |
|
4113 |
> |
// implement Set API |
4114 |
> |
|
4115 |
> |
public boolean contains(Object o) { return map.containsKey(o); } |
4116 |
> |
public boolean remove(Object o) { return map.remove(o) != null; } |
4117 |
> |
|
4118 |
> |
/** |
4119 |
> |
* Returns a "weakly consistent" iterator that will never |
4120 |
> |
* throw {@link ConcurrentModificationException}, and |
4121 |
> |
* guarantees to traverse elements as they existed upon |
4122 |
> |
* construction of the iterator, and may (but is not |
4123 |
> |
* guaranteed to) reflect any modifications subsequent to |
4124 |
> |
* construction. |
4125 |
> |
* |
4126 |
> |
* @return an iterator over the keys of this map |
4127 |
> |
*/ |
4128 |
> |
public Iterator<K> iterator() { return new KeyIterator<K,V>(map); } |
4129 |
> |
public boolean add(K e) { |
4130 |
> |
V v; |
4131 |
> |
if ((v = value) == null) |
4132 |
> |
throw new UnsupportedOperationException(); |
4133 |
> |
if (e == null) |
4134 |
> |
throw new NullPointerException(); |
4135 |
> |
return map.internalPutIfAbsent(e, v) == null; |
4136 |
> |
} |
4137 |
> |
public boolean addAll(Collection<? extends K> c) { |
4138 |
> |
boolean added = false; |
4139 |
> |
V v; |
4140 |
> |
if ((v = value) == null) |
4141 |
> |
throw new UnsupportedOperationException(); |
4142 |
> |
for (K e : c) { |
4143 |
> |
if (e == null) |
4144 |
> |
throw new NullPointerException(); |
4145 |
> |
if (map.internalPutIfAbsent(e, v) == null) |
4146 |
> |
added = true; |
4147 |
> |
} |
4148 |
> |
return added; |
4149 |
|
} |
4150 |
|
public boolean equals(Object o) { |
4151 |
|
Set<?> c; |
4153 |
|
((c = (Set<?>)o) == this || |
4154 |
|
(containsAll(c) && c.containsAll(this)))); |
4155 |
|
} |
4156 |
+ |
|
4157 |
+ |
/** |
4158 |
+ |
* Performs the given action for each key. |
4159 |
+ |
* |
4160 |
+ |
* @param action the action |
4161 |
+ |
*/ |
4162 |
+ |
public void forEach(Action<K> action) { |
4163 |
+ |
ForkJoinTasks.forEachKey |
4164 |
+ |
(map, action).invoke(); |
4165 |
+ |
} |
4166 |
+ |
|
4167 |
+ |
/** |
4168 |
+ |
* Performs the given action for each non-null transformation |
4169 |
+ |
* of each key. |
4170 |
+ |
* |
4171 |
+ |
* @param transformer a function returning the transformation |
4172 |
+ |
* for an element, or null of there is no transformation (in |
4173 |
+ |
* which case the action is not applied). |
4174 |
+ |
* @param action the action |
4175 |
+ |
*/ |
4176 |
+ |
public <U> void forEach(Fun<? super K, ? extends U> transformer, |
4177 |
+ |
Action<U> action) { |
4178 |
+ |
ForkJoinTasks.forEachKey |
4179 |
+ |
(map, transformer, action).invoke(); |
4180 |
+ |
} |
4181 |
+ |
|
4182 |
+ |
/** |
4183 |
+ |
* Returns a non-null result from applying the given search |
4184 |
+ |
* function on each key, or null if none. Upon success, |
4185 |
+ |
* further element processing is suppressed and the results of |
4186 |
+ |
* any other parallel invocations of the search function are |
4187 |
+ |
* ignored. |
4188 |
+ |
* |
4189 |
+ |
* @param searchFunction a function returning a non-null |
4190 |
+ |
* result on success, else null |
4191 |
+ |
* @return a non-null result from applying the given search |
4192 |
+ |
* function on each key, or null if none |
4193 |
+ |
*/ |
4194 |
+ |
public <U> U search(Fun<? super K, ? extends U> searchFunction) { |
4195 |
+ |
return ForkJoinTasks.searchKeys |
4196 |
+ |
(map, searchFunction).invoke(); |
4197 |
+ |
} |
4198 |
+ |
|
4199 |
+ |
/** |
4200 |
+ |
* Returns the result of accumulating all keys using the given |
4201 |
+ |
* reducer to combine values, or null if none. |
4202 |
+ |
* |
4203 |
+ |
* @param reducer a commutative associative combining function |
4204 |
+ |
* @return the result of accumulating all keys using the given |
4205 |
+ |
* reducer to combine values, or null if none |
4206 |
+ |
*/ |
4207 |
+ |
public K reduce(BiFun<? super K, ? super K, ? extends K> reducer) { |
4208 |
+ |
return ForkJoinTasks.reduceKeys |
4209 |
+ |
(map, reducer).invoke(); |
4210 |
+ |
} |
4211 |
+ |
|
4212 |
+ |
/** |
4213 |
+ |
* Returns the result of accumulating the given transformation |
4214 |
+ |
* of all keys using the given reducer to combine values, and |
4215 |
+ |
* the given basis as an identity value. |
4216 |
+ |
* |
4217 |
+ |
* @param transformer a function returning the transformation |
4218 |
+ |
* for an element |
4219 |
+ |
* @param basis the identity (initial default value) for the reduction |
4220 |
+ |
* @param reducer a commutative associative combining function |
4221 |
+ |
* @return the result of accumulating the given transformation |
4222 |
+ |
* of all keys |
4223 |
+ |
*/ |
4224 |
+ |
public double reduceToDouble(ObjectToDouble<? super K> transformer, |
4225 |
+ |
double basis, |
4226 |
+ |
DoubleByDoubleToDouble reducer) { |
4227 |
+ |
return ForkJoinTasks.reduceKeysToDouble |
4228 |
+ |
(map, transformer, basis, reducer).invoke(); |
4229 |
+ |
} |
4230 |
+ |
|
4231 |
+ |
|
4232 |
+ |
/** |
4233 |
+ |
* Returns the result of accumulating the given transformation |
4234 |
+ |
* of all keys using the given reducer to combine values, and |
4235 |
+ |
* the given basis as an identity value. |
4236 |
+ |
* |
4237 |
+ |
* @param transformer a function returning the transformation |
4238 |
+ |
* for an element |
4239 |
+ |
* @param basis the identity (initial default value) for the reduction |
4240 |
+ |
* @param reducer a commutative associative combining function |
4241 |
+ |
* @return the result of accumulating the given transformation |
4242 |
+ |
* of all keys |
4243 |
+ |
*/ |
4244 |
+ |
public long reduceToLong(ObjectToLong<? super K> transformer, |
4245 |
+ |
long basis, |
4246 |
+ |
LongByLongToLong reducer) { |
4247 |
+ |
return ForkJoinTasks.reduceKeysToLong |
4248 |
+ |
(map, transformer, basis, reducer).invoke(); |
4249 |
+ |
} |
4250 |
+ |
|
4251 |
+ |
/** |
4252 |
+ |
* Returns the result of accumulating the given transformation |
4253 |
+ |
* of all keys using the given reducer to combine values, and |
4254 |
+ |
* the given basis as an identity value. |
4255 |
+ |
* |
4256 |
+ |
* @param transformer a function returning the transformation |
4257 |
+ |
* for an element |
4258 |
+ |
* @param basis the identity (initial default value) for the reduction |
4259 |
+ |
* @param reducer a commutative associative combining function |
4260 |
+ |
* @return the result of accumulating the given transformation |
4261 |
+ |
* of all keys |
4262 |
+ |
*/ |
4263 |
+ |
public int reduceToInt(ObjectToInt<? super K> transformer, |
4264 |
+ |
int basis, |
4265 |
+ |
IntByIntToInt reducer) { |
4266 |
+ |
return ForkJoinTasks.reduceKeysToInt |
4267 |
+ |
(map, transformer, basis, reducer).invoke(); |
4268 |
+ |
} |
4269 |
+ |
|
4270 |
|
} |
4271 |
|
|
4272 |
< |
static final class Values<K,V> extends MapView<K,V> |
4272 |
> |
/** |
4273 |
> |
* A view of a ConcurrentHashMapV8 as a {@link Collection} of |
4274 |
> |
* values, in which additions are disabled. This class cannot be |
4275 |
> |
* directly instantiated. See {@link #values}, |
4276 |
> |
* |
4277 |
> |
* <p>The view's {@code iterator} is a "weakly consistent" iterator |
4278 |
> |
* that will never throw {@link ConcurrentModificationException}, |
4279 |
> |
* and guarantees to traverse elements as they existed upon |
4280 |
> |
* construction of the iterator, and may (but is not guaranteed to) |
4281 |
> |
* reflect any modifications subsequent to construction. |
4282 |
> |
*/ |
4283 |
> |
public static final class ValuesView<K,V> extends CHMView<K,V> |
4284 |
|
implements Collection<V> { |
4285 |
< |
Values(ConcurrentHashMapV8<K, V> map) { super(map); } |
4285 |
> |
ValuesView(ConcurrentHashMapV8<K, V> map) { super(map); } |
4286 |
|
public final boolean contains(Object o) { return map.containsValue(o); } |
2243 |
– |
|
4287 |
|
public final boolean remove(Object o) { |
4288 |
|
if (o != null) { |
4289 |
|
Iterator<V> it = new ValueIterator<K,V>(map); |
4296 |
|
} |
4297 |
|
return false; |
4298 |
|
} |
4299 |
+ |
|
4300 |
+ |
/** |
4301 |
+ |
* Returns a "weakly consistent" iterator that will never |
4302 |
+ |
* throw {@link ConcurrentModificationException}, and |
4303 |
+ |
* guarantees to traverse elements as they existed upon |
4304 |
+ |
* construction of the iterator, and may (but is not |
4305 |
+ |
* guaranteed to) reflect any modifications subsequent to |
4306 |
+ |
* construction. |
4307 |
+ |
* |
4308 |
+ |
* @return an iterator over the values of this map |
4309 |
+ |
*/ |
4310 |
|
public final Iterator<V> iterator() { |
4311 |
|
return new ValueIterator<K,V>(map); |
4312 |
|
} |
2259 |
– |
final Iterator<?> iter() { |
2260 |
– |
return new ValueIterator<K,V>(map); |
2261 |
– |
} |
4313 |
|
public final boolean add(V e) { |
4314 |
|
throw new UnsupportedOperationException(); |
4315 |
|
} |
4316 |
|
public final boolean addAll(Collection<? extends V> c) { |
4317 |
|
throw new UnsupportedOperationException(); |
4318 |
|
} |
4319 |
+ |
|
4320 |
+ |
/** |
4321 |
+ |
* Performs the given action for each value. |
4322 |
+ |
* |
4323 |
+ |
* @param action the action |
4324 |
+ |
*/ |
4325 |
+ |
public void forEach(Action<V> action) { |
4326 |
+ |
ForkJoinTasks.forEachValue |
4327 |
+ |
(map, action).invoke(); |
4328 |
+ |
} |
4329 |
+ |
|
4330 |
+ |
/** |
4331 |
+ |
* Performs the given action for each non-null transformation |
4332 |
+ |
* of each value. |
4333 |
+ |
* |
4334 |
+ |
* @param transformer a function returning the transformation |
4335 |
+ |
* for an element, or null of there is no transformation (in |
4336 |
+ |
* which case the action is not applied). |
4337 |
+ |
*/ |
4338 |
+ |
public <U> void forEach(Fun<? super V, ? extends U> transformer, |
4339 |
+ |
Action<U> action) { |
4340 |
+ |
ForkJoinTasks.forEachValue |
4341 |
+ |
(map, transformer, action).invoke(); |
4342 |
+ |
} |
4343 |
+ |
|
4344 |
+ |
/** |
4345 |
+ |
* Returns a non-null result from applying the given search |
4346 |
+ |
* function on each value, or null if none. Upon success, |
4347 |
+ |
* further element processing is suppressed and the results of |
4348 |
+ |
* any other parallel invocations of the search function are |
4349 |
+ |
* ignored. |
4350 |
+ |
* |
4351 |
+ |
* @param searchFunction a function returning a non-null |
4352 |
+ |
* result on success, else null |
4353 |
+ |
* @return a non-null result from applying the given search |
4354 |
+ |
* function on each value, or null if none |
4355 |
+ |
* |
4356 |
+ |
*/ |
4357 |
+ |
public <U> U search(Fun<? super V, ? extends U> searchFunction) { |
4358 |
+ |
return ForkJoinTasks.searchValues |
4359 |
+ |
(map, searchFunction).invoke(); |
4360 |
+ |
} |
4361 |
+ |
|
4362 |
+ |
/** |
4363 |
+ |
* Returns the result of accumulating all values using the |
4364 |
+ |
* given reducer to combine values, or null if none. |
4365 |
+ |
* |
4366 |
+ |
* @param reducer a commutative associative combining function |
4367 |
+ |
* @return the result of accumulating all values |
4368 |
+ |
*/ |
4369 |
+ |
public V reduce(BiFun<? super V, ? super V, ? extends V> reducer) { |
4370 |
+ |
return ForkJoinTasks.reduceValues |
4371 |
+ |
(map, reducer).invoke(); |
4372 |
+ |
} |
4373 |
+ |
|
4374 |
+ |
/** |
4375 |
+ |
* Returns the result of accumulating the given transformation |
4376 |
+ |
* of all values using the given reducer to combine values, or |
4377 |
+ |
* null if none. |
4378 |
+ |
* |
4379 |
+ |
* @param transformer a function returning the transformation |
4380 |
+ |
* for an element, or null of there is no transformation (in |
4381 |
+ |
* which case it is not combined). |
4382 |
+ |
* @param reducer a commutative associative combining function |
4383 |
+ |
* @return the result of accumulating the given transformation |
4384 |
+ |
* of all values |
4385 |
+ |
*/ |
4386 |
+ |
public <U> U reduce(Fun<? super V, ? extends U> transformer, |
4387 |
+ |
BiFun<? super U, ? super U, ? extends U> reducer) { |
4388 |
+ |
return ForkJoinTasks.reduceValues |
4389 |
+ |
(map, transformer, reducer).invoke(); |
4390 |
+ |
} |
4391 |
+ |
|
4392 |
+ |
/** |
4393 |
+ |
* Returns the result of accumulating the given transformation |
4394 |
+ |
* of all values using the given reducer to combine values, |
4395 |
+ |
* and the given basis as an identity value. |
4396 |
+ |
* |
4397 |
+ |
* @param transformer a function returning the transformation |
4398 |
+ |
* for an element |
4399 |
+ |
* @param basis the identity (initial default value) for the reduction |
4400 |
+ |
* @param reducer a commutative associative combining function |
4401 |
+ |
* @return the result of accumulating the given transformation |
4402 |
+ |
* of all values |
4403 |
+ |
*/ |
4404 |
+ |
public double reduceToDouble(ObjectToDouble<? super V> transformer, |
4405 |
+ |
double basis, |
4406 |
+ |
DoubleByDoubleToDouble reducer) { |
4407 |
+ |
return ForkJoinTasks.reduceValuesToDouble |
4408 |
+ |
(map, transformer, basis, reducer).invoke(); |
4409 |
+ |
} |
4410 |
+ |
|
4411 |
+ |
/** |
4412 |
+ |
* Returns the result of accumulating the given transformation |
4413 |
+ |
* of all values using the given reducer to combine values, |
4414 |
+ |
* and the given basis as an identity value. |
4415 |
+ |
* |
4416 |
+ |
* @param transformer a function returning the transformation |
4417 |
+ |
* for an element |
4418 |
+ |
* @param basis the identity (initial default value) for the reduction |
4419 |
+ |
* @param reducer a commutative associative combining function |
4420 |
+ |
* @return the result of accumulating the given transformation |
4421 |
+ |
* of all values |
4422 |
+ |
*/ |
4423 |
+ |
public long reduceToLong(ObjectToLong<? super V> transformer, |
4424 |
+ |
long basis, |
4425 |
+ |
LongByLongToLong reducer) { |
4426 |
+ |
return ForkJoinTasks.reduceValuesToLong |
4427 |
+ |
(map, transformer, basis, reducer).invoke(); |
4428 |
+ |
} |
4429 |
+ |
|
4430 |
+ |
/** |
4431 |
+ |
* Returns the result of accumulating the given transformation |
4432 |
+ |
* of all values using the given reducer to combine values, |
4433 |
+ |
* and the given basis as an identity value. |
4434 |
+ |
* |
4435 |
+ |
* @param transformer a function returning the transformation |
4436 |
+ |
* for an element |
4437 |
+ |
* @param basis the identity (initial default value) for the reduction |
4438 |
+ |
* @param reducer a commutative associative combining function |
4439 |
+ |
* @return the result of accumulating the given transformation |
4440 |
+ |
* of all values |
4441 |
+ |
*/ |
4442 |
+ |
public int reduceToInt(ObjectToInt<? super V> transformer, |
4443 |
+ |
int basis, |
4444 |
+ |
IntByIntToInt reducer) { |
4445 |
+ |
return ForkJoinTasks.reduceValuesToInt |
4446 |
+ |
(map, transformer, basis, reducer).invoke(); |
4447 |
+ |
} |
4448 |
+ |
|
4449 |
|
} |
4450 |
|
|
4451 |
< |
static final class EntrySet<K,V> extends MapView<K,V> |
4451 |
> |
/** |
4452 |
> |
* A view of a ConcurrentHashMapV8 as a {@link Set} of (key, value) |
4453 |
> |
* entries. This class cannot be directly instantiated. See |
4454 |
> |
* {@link #entrySet}. |
4455 |
> |
*/ |
4456 |
> |
public static final class EntrySetView<K,V> extends CHMView<K,V> |
4457 |
|
implements Set<Map.Entry<K,V>> { |
4458 |
< |
EntrySet(ConcurrentHashMapV8<K, V> map) { super(map); } |
2273 |
< |
|
4458 |
> |
EntrySetView(ConcurrentHashMapV8<K, V> map) { super(map); } |
4459 |
|
public final boolean contains(Object o) { |
4460 |
|
Object k, v, r; Map.Entry<?,?> e; |
4461 |
|
return ((o instanceof Map.Entry) && |
4464 |
|
(v = e.getValue()) != null && |
4465 |
|
(v == r || v.equals(r))); |
4466 |
|
} |
2282 |
– |
|
4467 |
|
public final boolean remove(Object o) { |
4468 |
|
Object k, v; Map.Entry<?,?> e; |
4469 |
|
return ((o instanceof Map.Entry) && |
4472 |
|
map.remove(k, v)); |
4473 |
|
} |
4474 |
|
|
4475 |
+ |
/** |
4476 |
+ |
* Returns a "weakly consistent" iterator that will never |
4477 |
+ |
* throw {@link ConcurrentModificationException}, and |
4478 |
+ |
* guarantees to traverse elements as they existed upon |
4479 |
+ |
* construction of the iterator, and may (but is not |
4480 |
+ |
* guaranteed to) reflect any modifications subsequent to |
4481 |
+ |
* construction. |
4482 |
+ |
* |
4483 |
+ |
* @return an iterator over the entries of this map |
4484 |
+ |
*/ |
4485 |
|
public final Iterator<Map.Entry<K,V>> iterator() { |
4486 |
|
return new EntryIterator<K,V>(map); |
4487 |
|
} |
4488 |
< |
final Iterator<?> iter() { |
2295 |
< |
return new SnapshotEntryIterator<K,V>(map); |
2296 |
< |
} |
4488 |
> |
|
4489 |
|
public final boolean add(Entry<K,V> e) { |
4490 |
< |
throw new UnsupportedOperationException(); |
4490 |
> |
K key = e.getKey(); |
4491 |
> |
V value = e.getValue(); |
4492 |
> |
if (key == null || value == null) |
4493 |
> |
throw new NullPointerException(); |
4494 |
> |
return map.internalPut(key, value) == null; |
4495 |
|
} |
4496 |
|
public final boolean addAll(Collection<? extends Entry<K,V>> c) { |
4497 |
< |
throw new UnsupportedOperationException(); |
4497 |
> |
boolean added = false; |
4498 |
> |
for (Entry<K,V> e : c) { |
4499 |
> |
if (add(e)) |
4500 |
> |
added = true; |
4501 |
> |
} |
4502 |
> |
return added; |
4503 |
|
} |
4504 |
|
public boolean equals(Object o) { |
4505 |
|
Set<?> c; |
4507 |
|
((c = (Set<?>)o) == this || |
4508 |
|
(containsAll(c) && c.containsAll(this)))); |
4509 |
|
} |
4510 |
+ |
|
4511 |
+ |
/** |
4512 |
+ |
* Performs the given action for each entry. |
4513 |
+ |
* |
4514 |
+ |
* @param action the action |
4515 |
+ |
*/ |
4516 |
+ |
public void forEach(Action<Map.Entry<K,V>> action) { |
4517 |
+ |
ForkJoinTasks.forEachEntry |
4518 |
+ |
(map, action).invoke(); |
4519 |
+ |
} |
4520 |
+ |
|
4521 |
+ |
/** |
4522 |
+ |
* Performs the given action for each non-null transformation |
4523 |
+ |
* of each entry. |
4524 |
+ |
* |
4525 |
+ |
* @param transformer a function returning the transformation |
4526 |
+ |
* for an element, or null of there is no transformation (in |
4527 |
+ |
* which case the action is not applied). |
4528 |
+ |
* @param action the action |
4529 |
+ |
*/ |
4530 |
+ |
public <U> void forEach(Fun<Map.Entry<K,V>, ? extends U> transformer, |
4531 |
+ |
Action<U> action) { |
4532 |
+ |
ForkJoinTasks.forEachEntry |
4533 |
+ |
(map, transformer, action).invoke(); |
4534 |
+ |
} |
4535 |
+ |
|
4536 |
+ |
/** |
4537 |
+ |
* Returns a non-null result from applying the given search |
4538 |
+ |
* function on each entry, or null if none. Upon success, |
4539 |
+ |
* further element processing is suppressed and the results of |
4540 |
+ |
* any other parallel invocations of the search function are |
4541 |
+ |
* ignored. |
4542 |
+ |
* |
4543 |
+ |
* @param searchFunction a function returning a non-null |
4544 |
+ |
* result on success, else null |
4545 |
+ |
* @return a non-null result from applying the given search |
4546 |
+ |
* function on each entry, or null if none |
4547 |
+ |
*/ |
4548 |
+ |
public <U> U search(Fun<Map.Entry<K,V>, ? extends U> searchFunction) { |
4549 |
+ |
return ForkJoinTasks.searchEntries |
4550 |
+ |
(map, searchFunction).invoke(); |
4551 |
+ |
} |
4552 |
+ |
|
4553 |
+ |
/** |
4554 |
+ |
* Returns the result of accumulating all entries using the |
4555 |
+ |
* given reducer to combine values, or null if none. |
4556 |
+ |
* |
4557 |
+ |
* @param reducer a commutative associative combining function |
4558 |
+ |
* @return the result of accumulating all entries |
4559 |
+ |
*/ |
4560 |
+ |
public Map.Entry<K,V> reduce(BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) { |
4561 |
+ |
return ForkJoinTasks.reduceEntries |
4562 |
+ |
(map, reducer).invoke(); |
4563 |
+ |
} |
4564 |
+ |
|
4565 |
+ |
/** |
4566 |
+ |
* Returns the result of accumulating the given transformation |
4567 |
+ |
* of all entries using the given reducer to combine values, |
4568 |
+ |
* or null if none. |
4569 |
+ |
* |
4570 |
+ |
* @param transformer a function returning the transformation |
4571 |
+ |
* for an element, or null of there is no transformation (in |
4572 |
+ |
* which case it is not combined). |
4573 |
+ |
* @param reducer a commutative associative combining function |
4574 |
+ |
* @return the result of accumulating the given transformation |
4575 |
+ |
* of all entries |
4576 |
+ |
*/ |
4577 |
+ |
public <U> U reduce(Fun<Map.Entry<K,V>, ? extends U> transformer, |
4578 |
+ |
BiFun<? super U, ? super U, ? extends U> reducer) { |
4579 |
+ |
return ForkJoinTasks.reduceEntries |
4580 |
+ |
(map, transformer, reducer).invoke(); |
4581 |
+ |
} |
4582 |
+ |
|
4583 |
+ |
/** |
4584 |
+ |
* Returns the result of accumulating the given transformation |
4585 |
+ |
* of all entries using the given reducer to combine values, |
4586 |
+ |
* and the given basis as an identity value. |
4587 |
+ |
* |
4588 |
+ |
* @param transformer a function returning the transformation |
4589 |
+ |
* for an element |
4590 |
+ |
* @param basis the identity (initial default value) for the reduction |
4591 |
+ |
* @param reducer a commutative associative combining function |
4592 |
+ |
* @return the result of accumulating the given transformation |
4593 |
+ |
* of all entries |
4594 |
+ |
*/ |
4595 |
+ |
public double reduceToDouble(ObjectToDouble<Map.Entry<K,V>> transformer, |
4596 |
+ |
double basis, |
4597 |
+ |
DoubleByDoubleToDouble reducer) { |
4598 |
+ |
return ForkJoinTasks.reduceEntriesToDouble |
4599 |
+ |
(map, transformer, basis, reducer).invoke(); |
4600 |
+ |
} |
4601 |
+ |
|
4602 |
+ |
/** |
4603 |
+ |
* Returns the result of accumulating the given transformation |
4604 |
+ |
* of all entries using the given reducer to combine values, |
4605 |
+ |
* and the given basis as an identity value. |
4606 |
+ |
* |
4607 |
+ |
* @param transformer a function returning the transformation |
4608 |
+ |
* for an element |
4609 |
+ |
* @param basis the identity (initial default value) for the reduction |
4610 |
+ |
* @param reducer a commutative associative combining function |
4611 |
+ |
* @return the result of accumulating the given transformation |
4612 |
+ |
* of all entries |
4613 |
+ |
*/ |
4614 |
+ |
public long reduceToLong(ObjectToLong<Map.Entry<K,V>> transformer, |
4615 |
+ |
long basis, |
4616 |
+ |
LongByLongToLong reducer) { |
4617 |
+ |
return ForkJoinTasks.reduceEntriesToLong |
4618 |
+ |
(map, transformer, basis, reducer).invoke(); |
4619 |
+ |
} |
4620 |
+ |
|
4621 |
+ |
/** |
4622 |
+ |
* Returns the result of accumulating the given transformation |
4623 |
+ |
* of all entries using the given reducer to combine values, |
4624 |
+ |
* and the given basis as an identity value. |
4625 |
+ |
* |
4626 |
+ |
* @param transformer a function returning the transformation |
4627 |
+ |
* for an element |
4628 |
+ |
* @param basis the identity (initial default value) for the reduction |
4629 |
+ |
* @param reducer a commutative associative combining function |
4630 |
+ |
* @return the result of accumulating the given transformation |
4631 |
+ |
* of all entries |
4632 |
+ |
*/ |
4633 |
+ |
public int reduceToInt(ObjectToInt<Map.Entry<K,V>> transformer, |
4634 |
+ |
int basis, |
4635 |
+ |
IntByIntToInt reducer) { |
4636 |
+ |
return ForkJoinTasks.reduceEntriesToInt |
4637 |
+ |
(map, transformer, basis, reducer).invoke(); |
4638 |
+ |
} |
4639 |
+ |
|
4640 |
|
} |
4641 |
|
|
4642 |
< |
/* ---------------- Serialization Support -------------- */ |
4642 |
> |
// --------------------------------------------------------------------- |
4643 |
|
|
4644 |
|
/** |
4645 |
< |
* Stripped-down version of helper class used in previous version, |
4646 |
< |
* declared for the sake of serialization compatibility |
4645 |
> |
* Predefined tasks for performing bulk parallel operations on |
4646 |
> |
* ConcurrentHashMapV8s. These tasks follow the forms and rules used |
4647 |
> |
* for bulk operations. Each method has the same name, but returns |
4648 |
> |
* a task rather than invoking it. These methods may be useful in |
4649 |
> |
* custom applications such as submitting a task without waiting |
4650 |
> |
* for completion, using a custom pool, or combining with other |
4651 |
> |
* tasks. |
4652 |
|
*/ |
4653 |
< |
static class Segment<K,V> implements Serializable { |
4654 |
< |
private static final long serialVersionUID = 2249069246763182397L; |
4655 |
< |
final float loadFactor; |
4656 |
< |
Segment(float lf) { this.loadFactor = lf; } |
4653 |
> |
public static class ForkJoinTasks { |
4654 |
> |
private ForkJoinTasks() {} |
4655 |
> |
|
4656 |
> |
/** |
4657 |
> |
* Returns a task that when invoked, performs the given |
4658 |
> |
* action for each (key, value) |
4659 |
> |
* |
4660 |
> |
* @param map the map |
4661 |
> |
* @param action the action |
4662 |
> |
* @return the task |
4663 |
> |
*/ |
4664 |
> |
public static <K,V> ForkJoinTask<Void> forEach |
4665 |
> |
(ConcurrentHashMapV8<K,V> map, |
4666 |
> |
BiAction<K,V> action) { |
4667 |
> |
if (action == null) throw new NullPointerException(); |
4668 |
> |
return new ForEachMappingTask<K,V>(map, null, -1, null, action); |
4669 |
> |
} |
4670 |
> |
|
4671 |
> |
/** |
4672 |
> |
* Returns a task that when invoked, performs the given |
4673 |
> |
* action for each non-null transformation of each (key, value) |
4674 |
> |
* |
4675 |
> |
* @param map the map |
4676 |
> |
* @param transformer a function returning the transformation |
4677 |
> |
* for an element, or null if there is no transformation (in |
4678 |
> |
* which case the action is not applied) |
4679 |
> |
* @param action the action |
4680 |
> |
* @return the task |
4681 |
> |
*/ |
4682 |
> |
public static <K,V,U> ForkJoinTask<Void> forEach |
4683 |
> |
(ConcurrentHashMapV8<K,V> map, |
4684 |
> |
BiFun<? super K, ? super V, ? extends U> transformer, |
4685 |
> |
Action<U> action) { |
4686 |
> |
if (transformer == null || action == null) |
4687 |
> |
throw new NullPointerException(); |
4688 |
> |
return new ForEachTransformedMappingTask<K,V,U> |
4689 |
> |
(map, null, -1, null, transformer, action); |
4690 |
> |
} |
4691 |
> |
|
4692 |
> |
/** |
4693 |
> |
* Returns a task that when invoked, returns a non-null result |
4694 |
> |
* from applying the given search function on each (key, |
4695 |
> |
* value), or null if none. Upon success, further element |
4696 |
> |
* processing is suppressed and the results of any other |
4697 |
> |
* parallel invocations of the search function are ignored. |
4698 |
> |
* |
4699 |
> |
* @param map the map |
4700 |
> |
* @param searchFunction a function returning a non-null |
4701 |
> |
* result on success, else null |
4702 |
> |
* @return the task |
4703 |
> |
*/ |
4704 |
> |
public static <K,V,U> ForkJoinTask<U> search |
4705 |
> |
(ConcurrentHashMapV8<K,V> map, |
4706 |
> |
BiFun<? super K, ? super V, ? extends U> searchFunction) { |
4707 |
> |
if (searchFunction == null) throw new NullPointerException(); |
4708 |
> |
return new SearchMappingsTask<K,V,U> |
4709 |
> |
(map, null, -1, null, searchFunction, |
4710 |
> |
new AtomicReference<U>()); |
4711 |
> |
} |
4712 |
> |
|
4713 |
> |
/** |
4714 |
> |
* Returns a task that when invoked, returns the result of |
4715 |
> |
* accumulating the given transformation of all (key, value) pairs |
4716 |
> |
* using the given reducer to combine values, or null if none. |
4717 |
> |
* |
4718 |
> |
* @param map the map |
4719 |
> |
* @param transformer a function returning the transformation |
4720 |
> |
* for an element, or null if there is no transformation (in |
4721 |
> |
* which case it is not combined). |
4722 |
> |
* @param reducer a commutative associative combining function |
4723 |
> |
* @return the task |
4724 |
> |
*/ |
4725 |
> |
public static <K,V,U> ForkJoinTask<U> reduce |
4726 |
> |
(ConcurrentHashMapV8<K,V> map, |
4727 |
> |
BiFun<? super K, ? super V, ? extends U> transformer, |
4728 |
> |
BiFun<? super U, ? super U, ? extends U> reducer) { |
4729 |
> |
if (transformer == null || reducer == null) |
4730 |
> |
throw new NullPointerException(); |
4731 |
> |
return new MapReduceMappingsTask<K,V,U> |
4732 |
> |
(map, null, -1, null, transformer, reducer); |
4733 |
> |
} |
4734 |
> |
|
4735 |
> |
/** |
4736 |
> |
* Returns a task that when invoked, returns the result of |
4737 |
> |
* accumulating the given transformation of all (key, value) pairs |
4738 |
> |
* using the given reducer to combine values, and the given |
4739 |
> |
* basis as an identity value. |
4740 |
> |
* |
4741 |
> |
* @param map the map |
4742 |
> |
* @param transformer a function returning the transformation |
4743 |
> |
* for an element |
4744 |
> |
* @param basis the identity (initial default value) for the reduction |
4745 |
> |
* @param reducer a commutative associative combining function |
4746 |
> |
* @return the task |
4747 |
> |
*/ |
4748 |
> |
public static <K,V> ForkJoinTask<Double> reduceToDouble |
4749 |
> |
(ConcurrentHashMapV8<K,V> map, |
4750 |
> |
ObjectByObjectToDouble<? super K, ? super V> transformer, |
4751 |
> |
double basis, |
4752 |
> |
DoubleByDoubleToDouble reducer) { |
4753 |
> |
if (transformer == null || reducer == null) |
4754 |
> |
throw new NullPointerException(); |
4755 |
> |
return new MapReduceMappingsToDoubleTask<K,V> |
4756 |
> |
(map, null, -1, null, transformer, basis, reducer); |
4757 |
> |
} |
4758 |
> |
|
4759 |
> |
/** |
4760 |
> |
* Returns a task that when invoked, returns the result of |
4761 |
> |
* accumulating the given transformation of all (key, value) pairs |
4762 |
> |
* using the given reducer to combine values, and the given |
4763 |
> |
* basis as an identity value. |
4764 |
> |
* |
4765 |
> |
* @param map the map |
4766 |
> |
* @param transformer a function returning the transformation |
4767 |
> |
* for an element |
4768 |
> |
* @param basis the identity (initial default value) for the reduction |
4769 |
> |
* @param reducer a commutative associative combining function |
4770 |
> |
* @return the task |
4771 |
> |
*/ |
4772 |
> |
public static <K,V> ForkJoinTask<Long> reduceToLong |
4773 |
> |
(ConcurrentHashMapV8<K,V> map, |
4774 |
> |
ObjectByObjectToLong<? super K, ? super V> transformer, |
4775 |
> |
long basis, |
4776 |
> |
LongByLongToLong reducer) { |
4777 |
> |
if (transformer == null || reducer == null) |
4778 |
> |
throw new NullPointerException(); |
4779 |
> |
return new MapReduceMappingsToLongTask<K,V> |
4780 |
> |
(map, null, -1, null, transformer, basis, reducer); |
4781 |
> |
} |
4782 |
> |
|
4783 |
> |
/** |
4784 |
> |
* Returns a task that when invoked, returns the result of |
4785 |
> |
* accumulating the given transformation of all (key, value) pairs |
4786 |
> |
* using the given reducer to combine values, and the given |
4787 |
> |
* basis as an identity value. |
4788 |
> |
* |
4789 |
> |
* @param transformer a function returning the transformation |
4790 |
> |
* for an element |
4791 |
> |
* @param basis the identity (initial default value) for the reduction |
4792 |
> |
* @param reducer a commutative associative combining function |
4793 |
> |
* @return the task |
4794 |
> |
*/ |
4795 |
> |
public static <K,V> ForkJoinTask<Integer> reduceToInt |
4796 |
> |
(ConcurrentHashMapV8<K,V> map, |
4797 |
> |
ObjectByObjectToInt<? super K, ? super V> transformer, |
4798 |
> |
int basis, |
4799 |
> |
IntByIntToInt reducer) { |
4800 |
> |
if (transformer == null || reducer == null) |
4801 |
> |
throw new NullPointerException(); |
4802 |
> |
return new MapReduceMappingsToIntTask<K,V> |
4803 |
> |
(map, null, -1, null, transformer, basis, reducer); |
4804 |
> |
} |
4805 |
> |
|
4806 |
> |
/** |
4807 |
> |
* Returns a task that when invoked, performs the given action |
4808 |
> |
* for each key. |
4809 |
> |
* |
4810 |
> |
* @param map the map |
4811 |
> |
* @param action the action |
4812 |
> |
* @return the task |
4813 |
> |
*/ |
4814 |
> |
public static <K,V> ForkJoinTask<Void> forEachKey |
4815 |
> |
(ConcurrentHashMapV8<K,V> map, |
4816 |
> |
Action<K> action) { |
4817 |
> |
if (action == null) throw new NullPointerException(); |
4818 |
> |
return new ForEachKeyTask<K,V>(map, null, -1, null, action); |
4819 |
> |
} |
4820 |
> |
|
4821 |
> |
/** |
4822 |
> |
* Returns a task that when invoked, performs the given action |
4823 |
> |
* for each non-null transformation of each key. |
4824 |
> |
* |
4825 |
> |
* @param map the map |
4826 |
> |
* @param transformer a function returning the transformation |
4827 |
> |
* for an element, or null if there is no transformation (in |
4828 |
> |
* which case the action is not applied) |
4829 |
> |
* @param action the action |
4830 |
> |
* @return the task |
4831 |
> |
*/ |
4832 |
> |
public static <K,V,U> ForkJoinTask<Void> forEachKey |
4833 |
> |
(ConcurrentHashMapV8<K,V> map, |
4834 |
> |
Fun<? super K, ? extends U> transformer, |
4835 |
> |
Action<U> action) { |
4836 |
> |
if (transformer == null || action == null) |
4837 |
> |
throw new NullPointerException(); |
4838 |
> |
return new ForEachTransformedKeyTask<K,V,U> |
4839 |
> |
(map, null, -1, null, transformer, action); |
4840 |
> |
} |
4841 |
> |
|
4842 |
> |
/** |
4843 |
> |
* Returns a task that when invoked, returns a non-null result |
4844 |
> |
* from applying the given search function on each key, or |
4845 |
> |
* null if none. Upon success, further element processing is |
4846 |
> |
* suppressed and the results of any other parallel |
4847 |
> |
* invocations of the search function are ignored. |
4848 |
> |
* |
4849 |
> |
* @param map the map |
4850 |
> |
* @param searchFunction a function returning a non-null |
4851 |
> |
* result on success, else null |
4852 |
> |
* @return the task |
4853 |
> |
*/ |
4854 |
> |
public static <K,V,U> ForkJoinTask<U> searchKeys |
4855 |
> |
(ConcurrentHashMapV8<K,V> map, |
4856 |
> |
Fun<? super K, ? extends U> searchFunction) { |
4857 |
> |
if (searchFunction == null) throw new NullPointerException(); |
4858 |
> |
return new SearchKeysTask<K,V,U> |
4859 |
> |
(map, null, -1, null, searchFunction, |
4860 |
> |
new AtomicReference<U>()); |
4861 |
> |
} |
4862 |
> |
|
4863 |
> |
/** |
4864 |
> |
* Returns a task that when invoked, returns the result of |
4865 |
> |
* accumulating all keys using the given reducer to combine |
4866 |
> |
* values, or null if none. |
4867 |
> |
* |
4868 |
> |
* @param map the map |
4869 |
> |
* @param reducer a commutative associative combining function |
4870 |
> |
* @return the task |
4871 |
> |
*/ |
4872 |
> |
public static <K,V> ForkJoinTask<K> reduceKeys |
4873 |
> |
(ConcurrentHashMapV8<K,V> map, |
4874 |
> |
BiFun<? super K, ? super K, ? extends K> reducer) { |
4875 |
> |
if (reducer == null) throw new NullPointerException(); |
4876 |
> |
return new ReduceKeysTask<K,V> |
4877 |
> |
(map, null, -1, null, reducer); |
4878 |
> |
} |
4879 |
> |
|
4880 |
> |
/** |
4881 |
> |
* Returns a task that when invoked, returns the result of |
4882 |
> |
* accumulating the given transformation of all keys using the given |
4883 |
> |
* reducer to combine values, or null if none. |
4884 |
> |
* |
4885 |
> |
* @param map the map |
4886 |
> |
* @param transformer a function returning the transformation |
4887 |
> |
* for an element, or null if there is no transformation (in |
4888 |
> |
* which case it is not combined). |
4889 |
> |
* @param reducer a commutative associative combining function |
4890 |
> |
* @return the task |
4891 |
> |
*/ |
4892 |
> |
public static <K,V,U> ForkJoinTask<U> reduceKeys |
4893 |
> |
(ConcurrentHashMapV8<K,V> map, |
4894 |
> |
Fun<? super K, ? extends U> transformer, |
4895 |
> |
BiFun<? super U, ? super U, ? extends U> reducer) { |
4896 |
> |
if (transformer == null || reducer == null) |
4897 |
> |
throw new NullPointerException(); |
4898 |
> |
return new MapReduceKeysTask<K,V,U> |
4899 |
> |
(map, null, -1, null, transformer, reducer); |
4900 |
> |
} |
4901 |
> |
|
4902 |
> |
/** |
4903 |
> |
* Returns a task that when invoked, returns the result of |
4904 |
> |
* accumulating the given transformation of all keys using the given |
4905 |
> |
* reducer to combine values, and the given basis as an |
4906 |
> |
* identity value. |
4907 |
> |
* |
4908 |
> |
* @param map the map |
4909 |
> |
* @param transformer a function returning the transformation |
4910 |
> |
* for an element |
4911 |
> |
* @param basis the identity (initial default value) for the reduction |
4912 |
> |
* @param reducer a commutative associative combining function |
4913 |
> |
* @return the task |
4914 |
> |
*/ |
4915 |
> |
public static <K,V> ForkJoinTask<Double> reduceKeysToDouble |
4916 |
> |
(ConcurrentHashMapV8<K,V> map, |
4917 |
> |
ObjectToDouble<? super K> transformer, |
4918 |
> |
double basis, |
4919 |
> |
DoubleByDoubleToDouble reducer) { |
4920 |
> |
if (transformer == null || reducer == null) |
4921 |
> |
throw new NullPointerException(); |
4922 |
> |
return new MapReduceKeysToDoubleTask<K,V> |
4923 |
> |
(map, null, -1, null, transformer, basis, reducer); |
4924 |
> |
} |
4925 |
> |
|
4926 |
> |
/** |
4927 |
> |
* Returns a task that when invoked, returns the result of |
4928 |
> |
* accumulating the given transformation of all keys using the given |
4929 |
> |
* reducer to combine values, and the given basis as an |
4930 |
> |
* identity value. |
4931 |
> |
* |
4932 |
> |
* @param map the map |
4933 |
> |
* @param transformer a function returning the transformation |
4934 |
> |
* for an element |
4935 |
> |
* @param basis the identity (initial default value) for the reduction |
4936 |
> |
* @param reducer a commutative associative combining function |
4937 |
> |
* @return the task |
4938 |
> |
*/ |
4939 |
> |
public static <K,V> ForkJoinTask<Long> reduceKeysToLong |
4940 |
> |
(ConcurrentHashMapV8<K,V> map, |
4941 |
> |
ObjectToLong<? super K> transformer, |
4942 |
> |
long basis, |
4943 |
> |
LongByLongToLong reducer) { |
4944 |
> |
if (transformer == null || reducer == null) |
4945 |
> |
throw new NullPointerException(); |
4946 |
> |
return new MapReduceKeysToLongTask<K,V> |
4947 |
> |
(map, null, -1, null, transformer, basis, reducer); |
4948 |
> |
} |
4949 |
> |
|
4950 |
> |
/** |
4951 |
> |
* Returns a task that when invoked, returns the result of |
4952 |
> |
* accumulating the given transformation of all keys using the given |
4953 |
> |
* reducer to combine values, and the given basis as an |
4954 |
> |
* identity value. |
4955 |
> |
* |
4956 |
> |
* @param map the map |
4957 |
> |
* @param transformer a function returning the transformation |
4958 |
> |
* for an element |
4959 |
> |
* @param basis the identity (initial default value) for the reduction |
4960 |
> |
* @param reducer a commutative associative combining function |
4961 |
> |
* @return the task |
4962 |
> |
*/ |
4963 |
> |
public static <K,V> ForkJoinTask<Integer> reduceKeysToInt |
4964 |
> |
(ConcurrentHashMapV8<K,V> map, |
4965 |
> |
ObjectToInt<? super K> transformer, |
4966 |
> |
int basis, |
4967 |
> |
IntByIntToInt reducer) { |
4968 |
> |
if (transformer == null || reducer == null) |
4969 |
> |
throw new NullPointerException(); |
4970 |
> |
return new MapReduceKeysToIntTask<K,V> |
4971 |
> |
(map, null, -1, null, transformer, basis, reducer); |
4972 |
> |
} |
4973 |
> |
|
4974 |
> |
/** |
4975 |
> |
* Returns a task that when invoked, performs the given action |
4976 |
> |
* for each value. |
4977 |
> |
* |
4978 |
> |
* @param map the map |
4979 |
> |
* @param action the action |
4980 |
> |
*/ |
4981 |
> |
public static <K,V> ForkJoinTask<Void> forEachValue |
4982 |
> |
(ConcurrentHashMapV8<K,V> map, |
4983 |
> |
Action<V> action) { |
4984 |
> |
if (action == null) throw new NullPointerException(); |
4985 |
> |
return new ForEachValueTask<K,V>(map, null, -1, null, action); |
4986 |
> |
} |
4987 |
> |
|
4988 |
> |
/** |
4989 |
> |
* Returns a task that when invoked, performs the given action |
4990 |
> |
* for each non-null transformation of each value. |
4991 |
> |
* |
4992 |
> |
* @param map the map |
4993 |
> |
* @param transformer a function returning the transformation |
4994 |
> |
* for an element, or null if there is no transformation (in |
4995 |
> |
* which case the action is not applied) |
4996 |
> |
* @param action the action |
4997 |
> |
*/ |
4998 |
> |
public static <K,V,U> ForkJoinTask<Void> forEachValue |
4999 |
> |
(ConcurrentHashMapV8<K,V> map, |
5000 |
> |
Fun<? super V, ? extends U> transformer, |
5001 |
> |
Action<U> action) { |
5002 |
> |
if (transformer == null || action == null) |
5003 |
> |
throw new NullPointerException(); |
5004 |
> |
return new ForEachTransformedValueTask<K,V,U> |
5005 |
> |
(map, null, -1, null, transformer, action); |
5006 |
> |
} |
5007 |
> |
|
5008 |
> |
/** |
5009 |
> |
* Returns a task that when invoked, returns a non-null result |
5010 |
> |
* from applying the given search function on each value, or |
5011 |
> |
* null if none. Upon success, further element processing is |
5012 |
> |
* suppressed and the results of any other parallel |
5013 |
> |
* invocations of the search function are ignored. |
5014 |
> |
* |
5015 |
> |
* @param map the map |
5016 |
> |
* @param searchFunction a function returning a non-null |
5017 |
> |
* result on success, else null |
5018 |
> |
* @return the task |
5019 |
> |
*/ |
5020 |
> |
public static <K,V,U> ForkJoinTask<U> searchValues |
5021 |
> |
(ConcurrentHashMapV8<K,V> map, |
5022 |
> |
Fun<? super V, ? extends U> searchFunction) { |
5023 |
> |
if (searchFunction == null) throw new NullPointerException(); |
5024 |
> |
return new SearchValuesTask<K,V,U> |
5025 |
> |
(map, null, -1, null, searchFunction, |
5026 |
> |
new AtomicReference<U>()); |
5027 |
> |
} |
5028 |
> |
|
5029 |
> |
/** |
5030 |
> |
* Returns a task that when invoked, returns the result of |
5031 |
> |
* accumulating all values using the given reducer to combine |
5032 |
> |
* values, or null if none. |
5033 |
> |
* |
5034 |
> |
* @param map the map |
5035 |
> |
* @param reducer a commutative associative combining function |
5036 |
> |
* @return the task |
5037 |
> |
*/ |
5038 |
> |
public static <K,V> ForkJoinTask<V> reduceValues |
5039 |
> |
(ConcurrentHashMapV8<K,V> map, |
5040 |
> |
BiFun<? super V, ? super V, ? extends V> reducer) { |
5041 |
> |
if (reducer == null) throw new NullPointerException(); |
5042 |
> |
return new ReduceValuesTask<K,V> |
5043 |
> |
(map, null, -1, null, reducer); |
5044 |
> |
} |
5045 |
> |
|
5046 |
> |
/** |
5047 |
> |
* Returns a task that when invoked, returns the result of |
5048 |
> |
* accumulating the given transformation of all values using the |
5049 |
> |
* given reducer to combine values, or null if none. |
5050 |
> |
* |
5051 |
> |
* @param map the map |
5052 |
> |
* @param transformer a function returning the transformation |
5053 |
> |
* for an element, or null if there is no transformation (in |
5054 |
> |
* which case it is not combined). |
5055 |
> |
* @param reducer a commutative associative combining function |
5056 |
> |
* @return the task |
5057 |
> |
*/ |
5058 |
> |
public static <K,V,U> ForkJoinTask<U> reduceValues |
5059 |
> |
(ConcurrentHashMapV8<K,V> map, |
5060 |
> |
Fun<? super V, ? extends U> transformer, |
5061 |
> |
BiFun<? super U, ? super U, ? extends U> reducer) { |
5062 |
> |
if (transformer == null || reducer == null) |
5063 |
> |
throw new NullPointerException(); |
5064 |
> |
return new MapReduceValuesTask<K,V,U> |
5065 |
> |
(map, null, -1, null, transformer, reducer); |
5066 |
> |
} |
5067 |
> |
|
5068 |
> |
/** |
5069 |
> |
* Returns a task that when invoked, returns the result of |
5070 |
> |
* accumulating the given transformation of all values using the |
5071 |
> |
* given reducer to combine values, and the given basis as an |
5072 |
> |
* identity value. |
5073 |
> |
* |
5074 |
> |
* @param map the map |
5075 |
> |
* @param transformer a function returning the transformation |
5076 |
> |
* for an element |
5077 |
> |
* @param basis the identity (initial default value) for the reduction |
5078 |
> |
* @param reducer a commutative associative combining function |
5079 |
> |
* @return the task |
5080 |
> |
*/ |
5081 |
> |
public static <K,V> ForkJoinTask<Double> reduceValuesToDouble |
5082 |
> |
(ConcurrentHashMapV8<K,V> map, |
5083 |
> |
ObjectToDouble<? super V> transformer, |
5084 |
> |
double basis, |
5085 |
> |
DoubleByDoubleToDouble reducer) { |
5086 |
> |
if (transformer == null || reducer == null) |
5087 |
> |
throw new NullPointerException(); |
5088 |
> |
return new MapReduceValuesToDoubleTask<K,V> |
5089 |
> |
(map, null, -1, null, transformer, basis, reducer); |
5090 |
> |
} |
5091 |
> |
|
5092 |
> |
/** |
5093 |
> |
* Returns a task that when invoked, returns the result of |
5094 |
> |
* accumulating the given transformation of all values using the |
5095 |
> |
* given reducer to combine values, and the given basis as an |
5096 |
> |
* identity value. |
5097 |
> |
* |
5098 |
> |
* @param map the map |
5099 |
> |
* @param transformer a function returning the transformation |
5100 |
> |
* for an element |
5101 |
> |
* @param basis the identity (initial default value) for the reduction |
5102 |
> |
* @param reducer a commutative associative combining function |
5103 |
> |
* @return the task |
5104 |
> |
*/ |
5105 |
> |
public static <K,V> ForkJoinTask<Long> reduceValuesToLong |
5106 |
> |
(ConcurrentHashMapV8<K,V> map, |
5107 |
> |
ObjectToLong<? super V> transformer, |
5108 |
> |
long basis, |
5109 |
> |
LongByLongToLong reducer) { |
5110 |
> |
if (transformer == null || reducer == null) |
5111 |
> |
throw new NullPointerException(); |
5112 |
> |
return new MapReduceValuesToLongTask<K,V> |
5113 |
> |
(map, null, -1, null, transformer, basis, reducer); |
5114 |
> |
} |
5115 |
> |
|
5116 |
> |
/** |
5117 |
> |
* Returns a task that when invoked, returns the result of |
5118 |
> |
* accumulating the given transformation of all values using the |
5119 |
> |
* given reducer to combine values, and the given basis as an |
5120 |
> |
* identity value. |
5121 |
> |
* |
5122 |
> |
* @param map the map |
5123 |
> |
* @param transformer a function returning the transformation |
5124 |
> |
* for an element |
5125 |
> |
* @param basis the identity (initial default value) for the reduction |
5126 |
> |
* @param reducer a commutative associative combining function |
5127 |
> |
* @return the task |
5128 |
> |
*/ |
5129 |
> |
public static <K,V> ForkJoinTask<Integer> reduceValuesToInt |
5130 |
> |
(ConcurrentHashMapV8<K,V> map, |
5131 |
> |
ObjectToInt<? super V> transformer, |
5132 |
> |
int basis, |
5133 |
> |
IntByIntToInt reducer) { |
5134 |
> |
if (transformer == null || reducer == null) |
5135 |
> |
throw new NullPointerException(); |
5136 |
> |
return new MapReduceValuesToIntTask<K,V> |
5137 |
> |
(map, null, -1, null, transformer, basis, reducer); |
5138 |
> |
} |
5139 |
> |
|
5140 |
> |
/** |
5141 |
> |
* Returns a task that when invoked, perform the given action |
5142 |
> |
* for each entry. |
5143 |
> |
* |
5144 |
> |
* @param map the map |
5145 |
> |
* @param action the action |
5146 |
> |
*/ |
5147 |
> |
public static <K,V> ForkJoinTask<Void> forEachEntry |
5148 |
> |
(ConcurrentHashMapV8<K,V> map, |
5149 |
> |
Action<Map.Entry<K,V>> action) { |
5150 |
> |
if (action == null) throw new NullPointerException(); |
5151 |
> |
return new ForEachEntryTask<K,V>(map, null, -1, null, action); |
5152 |
> |
} |
5153 |
> |
|
5154 |
> |
/** |
5155 |
> |
* Returns a task that when invoked, perform the given action |
5156 |
> |
* for each non-null transformation of each entry. |
5157 |
> |
* |
5158 |
> |
* @param map the map |
5159 |
> |
* @param transformer a function returning the transformation |
5160 |
> |
* for an element, or null if there is no transformation (in |
5161 |
> |
* which case the action is not applied) |
5162 |
> |
* @param action the action |
5163 |
> |
*/ |
5164 |
> |
public static <K,V,U> ForkJoinTask<Void> forEachEntry |
5165 |
> |
(ConcurrentHashMapV8<K,V> map, |
5166 |
> |
Fun<Map.Entry<K,V>, ? extends U> transformer, |
5167 |
> |
Action<U> action) { |
5168 |
> |
if (transformer == null || action == null) |
5169 |
> |
throw new NullPointerException(); |
5170 |
> |
return new ForEachTransformedEntryTask<K,V,U> |
5171 |
> |
(map, null, -1, null, transformer, action); |
5172 |
> |
} |
5173 |
> |
|
5174 |
> |
/** |
5175 |
> |
* Returns a task that when invoked, returns a non-null result |
5176 |
> |
* from applying the given search function on each entry, or |
5177 |
> |
* null if none. Upon success, further element processing is |
5178 |
> |
* suppressed and the results of any other parallel |
5179 |
> |
* invocations of the search function are ignored. |
5180 |
> |
* |
5181 |
> |
* @param map the map |
5182 |
> |
* @param searchFunction a function returning a non-null |
5183 |
> |
* result on success, else null |
5184 |
> |
* @return the task |
5185 |
> |
*/ |
5186 |
> |
public static <K,V,U> ForkJoinTask<U> searchEntries |
5187 |
> |
(ConcurrentHashMapV8<K,V> map, |
5188 |
> |
Fun<Map.Entry<K,V>, ? extends U> searchFunction) { |
5189 |
> |
if (searchFunction == null) throw new NullPointerException(); |
5190 |
> |
return new SearchEntriesTask<K,V,U> |
5191 |
> |
(map, null, -1, null, searchFunction, |
5192 |
> |
new AtomicReference<U>()); |
5193 |
> |
} |
5194 |
> |
|
5195 |
> |
/** |
5196 |
> |
* Returns a task that when invoked, returns the result of |
5197 |
> |
* accumulating all entries using the given reducer to combine |
5198 |
> |
* values, or null if none. |
5199 |
> |
* |
5200 |
> |
* @param map the map |
5201 |
> |
* @param reducer a commutative associative combining function |
5202 |
> |
* @return the task |
5203 |
> |
*/ |
5204 |
> |
public static <K,V> ForkJoinTask<Map.Entry<K,V>> reduceEntries |
5205 |
> |
(ConcurrentHashMapV8<K,V> map, |
5206 |
> |
BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) { |
5207 |
> |
if (reducer == null) throw new NullPointerException(); |
5208 |
> |
return new ReduceEntriesTask<K,V> |
5209 |
> |
(map, null, -1, null, reducer); |
5210 |
> |
} |
5211 |
> |
|
5212 |
> |
/** |
5213 |
> |
* Returns a task that when invoked, returns the result of |
5214 |
> |
* accumulating the given transformation of all entries using the |
5215 |
> |
* given reducer to combine values, or null if none. |
5216 |
> |
* |
5217 |
> |
* @param map the map |
5218 |
> |
* @param transformer a function returning the transformation |
5219 |
> |
* for an element, or null if there is no transformation (in |
5220 |
> |
* which case it is not combined). |
5221 |
> |
* @param reducer a commutative associative combining function |
5222 |
> |
* @return the task |
5223 |
> |
*/ |
5224 |
> |
public static <K,V,U> ForkJoinTask<U> reduceEntries |
5225 |
> |
(ConcurrentHashMapV8<K,V> map, |
5226 |
> |
Fun<Map.Entry<K,V>, ? extends U> transformer, |
5227 |
> |
BiFun<? super U, ? super U, ? extends U> reducer) { |
5228 |
> |
if (transformer == null || reducer == null) |
5229 |
> |
throw new NullPointerException(); |
5230 |
> |
return new MapReduceEntriesTask<K,V,U> |
5231 |
> |
(map, null, -1, null, transformer, reducer); |
5232 |
> |
} |
5233 |
> |
|
5234 |
> |
/** |
5235 |
> |
* Returns a task that when invoked, returns the result of |
5236 |
> |
* accumulating the given transformation of all entries using the |
5237 |
> |
* given reducer to combine values, and the given basis as an |
5238 |
> |
* identity value. |
5239 |
> |
* |
5240 |
> |
* @param map the map |
5241 |
> |
* @param transformer a function returning the transformation |
5242 |
> |
* for an element |
5243 |
> |
* @param basis the identity (initial default value) for the reduction |
5244 |
> |
* @param reducer a commutative associative combining function |
5245 |
> |
* @return the task |
5246 |
> |
*/ |
5247 |
> |
public static <K,V> ForkJoinTask<Double> reduceEntriesToDouble |
5248 |
> |
(ConcurrentHashMapV8<K,V> map, |
5249 |
> |
ObjectToDouble<Map.Entry<K,V>> transformer, |
5250 |
> |
double basis, |
5251 |
> |
DoubleByDoubleToDouble reducer) { |
5252 |
> |
if (transformer == null || reducer == null) |
5253 |
> |
throw new NullPointerException(); |
5254 |
> |
return new MapReduceEntriesToDoubleTask<K,V> |
5255 |
> |
(map, null, -1, null, transformer, basis, reducer); |
5256 |
> |
} |
5257 |
> |
|
5258 |
> |
/** |
5259 |
> |
* Returns a task that when invoked, returns the result of |
5260 |
> |
* accumulating the given transformation of all entries using the |
5261 |
> |
* given reducer to combine values, and the given basis as an |
5262 |
> |
* identity value. |
5263 |
> |
* |
5264 |
> |
* @param map the map |
5265 |
> |
* @param transformer a function returning the transformation |
5266 |
> |
* for an element |
5267 |
> |
* @param basis the identity (initial default value) for the reduction |
5268 |
> |
* @param reducer a commutative associative combining function |
5269 |
> |
* @return the task |
5270 |
> |
*/ |
5271 |
> |
public static <K,V> ForkJoinTask<Long> reduceEntriesToLong |
5272 |
> |
(ConcurrentHashMapV8<K,V> map, |
5273 |
> |
ObjectToLong<Map.Entry<K,V>> transformer, |
5274 |
> |
long basis, |
5275 |
> |
LongByLongToLong reducer) { |
5276 |
> |
if (transformer == null || reducer == null) |
5277 |
> |
throw new NullPointerException(); |
5278 |
> |
return new MapReduceEntriesToLongTask<K,V> |
5279 |
> |
(map, null, -1, null, transformer, basis, reducer); |
5280 |
> |
} |
5281 |
> |
|
5282 |
> |
/** |
5283 |
> |
* Returns a task that when invoked, returns the result of |
5284 |
> |
* accumulating the given transformation of all entries using the |
5285 |
> |
* given reducer to combine values, and the given basis as an |
5286 |
> |
* identity value. |
5287 |
> |
* |
5288 |
> |
* @param map the map |
5289 |
> |
* @param transformer a function returning the transformation |
5290 |
> |
* for an element |
5291 |
> |
* @param basis the identity (initial default value) for the reduction |
5292 |
> |
* @param reducer a commutative associative combining function |
5293 |
> |
* @return the task |
5294 |
> |
*/ |
5295 |
> |
public static <K,V> ForkJoinTask<Integer> reduceEntriesToInt |
5296 |
> |
(ConcurrentHashMapV8<K,V> map, |
5297 |
> |
ObjectToInt<Map.Entry<K,V>> transformer, |
5298 |
> |
int basis, |
5299 |
> |
IntByIntToInt reducer) { |
5300 |
> |
if (transformer == null || reducer == null) |
5301 |
> |
throw new NullPointerException(); |
5302 |
> |
return new MapReduceEntriesToIntTask<K,V> |
5303 |
> |
(map, null, -1, null, transformer, basis, reducer); |
5304 |
> |
} |
5305 |
|
} |
5306 |
|
|
5307 |
< |
/** |
5308 |
< |
* Saves the state of the {@code ConcurrentHashMapV8} instance to a |
5309 |
< |
* stream (i.e., serializes it). |
5310 |
< |
* @param s the stream |
5311 |
< |
* @serialData |
5312 |
< |
* the key (Object) and value (Object) |
5313 |
< |
* for each key-value mapping, followed by a null pair. |
5314 |
< |
* The key-value mappings are emitted in no particular order. |
5315 |
< |
*/ |
5316 |
< |
@SuppressWarnings("unchecked") |
5317 |
< |
private void writeObject(java.io.ObjectOutputStream s) |
5318 |
< |
throws java.io.IOException { |
5319 |
< |
if (segments == null) { // for serialization compatibility |
5320 |
< |
segments = (Segment<K,V>[]) |
5321 |
< |
new Segment<?,?>[DEFAULT_CONCURRENCY_LEVEL]; |
5322 |
< |
for (int i = 0; i < segments.length; ++i) |
5323 |
< |
segments[i] = new Segment<K,V>(LOAD_FACTOR); |
5307 |
> |
// ------------------------------------------------------- |
5308 |
> |
|
5309 |
> |
/** |
5310 |
> |
* Base for FJ tasks for bulk operations. This adds a variant of |
5311 |
> |
* CountedCompleters and some split and merge bookkeeping to |
5312 |
> |
* iterator functionality. The forEach and reduce methods are |
5313 |
> |
* similar to those illustrated in CountedCompleter documentation, |
5314 |
> |
* except that bottom-up reduction completions perform them within |
5315 |
> |
* their compute methods. The search methods are like forEach |
5316 |
> |
* except they continually poll for success and exit early. Also, |
5317 |
> |
* exceptions are handled in a simpler manner, by just trying to |
5318 |
> |
* complete root task exceptionally. |
5319 |
> |
*/ |
5320 |
> |
@SuppressWarnings("serial") static abstract class BulkTask<K,V,R> extends Traverser<K,V,R> { |
5321 |
> |
final BulkTask<K,V,?> parent; // completion target |
5322 |
> |
int batch; // split control; -1 for unknown |
5323 |
> |
int pending; // completion control |
5324 |
> |
|
5325 |
> |
BulkTask(ConcurrentHashMapV8<K,V> map, BulkTask<K,V,?> parent, |
5326 |
> |
int batch) { |
5327 |
> |
super(map); |
5328 |
> |
this.parent = parent; |
5329 |
> |
this.batch = batch; |
5330 |
> |
if (parent != null && map != null) { // split parent |
5331 |
> |
Node[] t; |
5332 |
> |
if ((t = parent.tab) == null && |
5333 |
> |
(t = parent.tab = map.table) != null) |
5334 |
> |
parent.baseLimit = parent.baseSize = t.length; |
5335 |
> |
this.tab = t; |
5336 |
> |
this.baseSize = parent.baseSize; |
5337 |
> |
int hi = this.baseLimit = parent.baseLimit; |
5338 |
> |
parent.baseLimit = this.index = this.baseIndex = |
5339 |
> |
(hi + parent.baseIndex + 1) >>> 1; |
5340 |
> |
} |
5341 |
|
} |
5342 |
< |
s.defaultWriteObject(); |
5343 |
< |
InternalIterator it = new InternalIterator(table); |
5344 |
< |
while (it.next != null) { |
5345 |
< |
s.writeObject(it.nextKey); |
5346 |
< |
s.writeObject(it.nextVal); |
5347 |
< |
it.advance(); |
5342 |
> |
|
5343 |
> |
/** |
5344 |
> |
* Forces root task to complete. |
5345 |
> |
* @param ex if null, complete normally, else exceptionally |
5346 |
> |
* @return false to simplify use |
5347 |
> |
*/ |
5348 |
> |
final boolean tryCompleteComputation(Throwable ex) { |
5349 |
> |
for (BulkTask<K,V,?> a = this;;) { |
5350 |
> |
BulkTask<K,V,?> p = a.parent; |
5351 |
> |
if (p == null) { |
5352 |
> |
if (ex != null) |
5353 |
> |
a.completeExceptionally(ex); |
5354 |
> |
else |
5355 |
> |
a.quietlyComplete(); |
5356 |
> |
return false; |
5357 |
> |
} |
5358 |
> |
a = p; |
5359 |
> |
} |
5360 |
> |
} |
5361 |
> |
|
5362 |
> |
/** |
5363 |
> |
* Version of tryCompleteComputation for function screening checks |
5364 |
> |
*/ |
5365 |
> |
final boolean abortOnNullFunction() { |
5366 |
> |
return tryCompleteComputation(new Error("Unexpected null function")); |
5367 |
> |
} |
5368 |
> |
|
5369 |
> |
// utilities |
5370 |
> |
|
5371 |
> |
/** CompareAndSet pending count */ |
5372 |
> |
final boolean casPending(int cmp, int val) { |
5373 |
> |
return U.compareAndSwapInt(this, PENDING, cmp, val); |
5374 |
> |
} |
5375 |
> |
|
5376 |
> |
/** |
5377 |
> |
* Returns approx exp2 of the number of times (minus one) to |
5378 |
> |
* split task by two before executing leaf action. This value |
5379 |
> |
* is faster to compute and more convenient to use as a guide |
5380 |
> |
* to splitting than is the depth, since it is used while |
5381 |
> |
* dividing by two anyway. |
5382 |
> |
*/ |
5383 |
> |
final int batch() { |
5384 |
> |
ConcurrentHashMapV8<K, V> m; int b; Node[] t; ForkJoinPool pool; |
5385 |
> |
if ((b = batch) < 0 && (m = map) != null) { // force initialization |
5386 |
> |
if ((t = tab) == null && (t = tab = m.table) != null) |
5387 |
> |
baseLimit = baseSize = t.length; |
5388 |
> |
if (t != null) { |
5389 |
> |
long n = m.counter.sum(); |
5390 |
> |
int par = ((pool = getPool()) == null) ? |
5391 |
> |
ForkJoinPool.getCommonPoolParallelism() : |
5392 |
> |
pool.getParallelism(); |
5393 |
> |
int sp = par << 3; // slack of 8 |
5394 |
> |
b = batch = (n <= 0L) ? 0 : (n < (long)sp) ? (int)n : sp; |
5395 |
> |
} |
5396 |
> |
} |
5397 |
> |
return b; |
5398 |
> |
} |
5399 |
> |
|
5400 |
> |
/** |
5401 |
> |
* Returns exportable snapshot entry. |
5402 |
> |
*/ |
5403 |
> |
static <K,V> AbstractMap.SimpleEntry<K,V> entryFor(K k, V v) { |
5404 |
> |
return new AbstractMap.SimpleEntry<K,V>(k, v); |
5405 |
> |
} |
5406 |
> |
|
5407 |
> |
// Unsafe mechanics |
5408 |
> |
private static final sun.misc.Unsafe U; |
5409 |
> |
private static final long PENDING; |
5410 |
> |
static { |
5411 |
> |
try { |
5412 |
> |
U = getUnsafe(); |
5413 |
> |
PENDING = U.objectFieldOffset |
5414 |
> |
(BulkTask.class.getDeclaredField("pending")); |
5415 |
> |
} catch (Exception e) { |
5416 |
> |
throw new Error(e); |
5417 |
> |
} |
5418 |
|
} |
2348 |
– |
s.writeObject(null); |
2349 |
– |
s.writeObject(null); |
2350 |
– |
segments = null; // throw away |
5419 |
|
} |
5420 |
|
|
5421 |
|
/** |
5422 |
< |
* Reconstitutes the instance from a stream (that is, deserializes it). |
2355 |
< |
* @param s the stream |
5422 |
> |
* Base class for non-reductive actions |
5423 |
|
*/ |
5424 |
< |
@SuppressWarnings("unchecked") |
5425 |
< |
private void readObject(java.io.ObjectInputStream s) |
5426 |
< |
throws java.io.IOException, ClassNotFoundException { |
5427 |
< |
s.defaultReadObject(); |
5428 |
< |
this.segments = null; // unneeded |
5429 |
< |
// initialize transient final field |
5430 |
< |
UNSAFE.putObjectVolatile(this, counterOffset, new LongAdder()); |
5424 |
> |
@SuppressWarnings("serial") static abstract class BulkAction<K,V,R> extends BulkTask<K,V,R> { |
5425 |
> |
BulkAction<K,V,?> nextTask; |
5426 |
> |
BulkAction(ConcurrentHashMapV8<K,V> map, BulkTask<K,V,?> parent, |
5427 |
> |
int batch, BulkAction<K,V,?> nextTask) { |
5428 |
> |
super(map, parent, batch); |
5429 |
> |
this.nextTask = nextTask; |
5430 |
> |
} |
5431 |
|
|
5432 |
< |
// Create all nodes, then place in table once size is known |
5433 |
< |
long size = 0L; |
5434 |
< |
Node p = null; |
5435 |
< |
for (;;) { |
5436 |
< |
K k = (K) s.readObject(); |
5437 |
< |
V v = (V) s.readObject(); |
5438 |
< |
if (k != null && v != null) { |
5439 |
< |
p = new Node(spread(k.hashCode()), k, v, p); |
5440 |
< |
++size; |
5432 |
> |
/** |
5433 |
> |
* Try to complete task and upward parents. Upon hitting |
5434 |
> |
* non-completed parent, if a non-FJ task, try to help out the |
5435 |
> |
* computation. |
5436 |
> |
*/ |
5437 |
> |
final void tryComplete(BulkAction<K,V,?> subtasks) { |
5438 |
> |
BulkTask<K,V,?> a = this, s = a; |
5439 |
> |
for (int c;;) { |
5440 |
> |
if ((c = a.pending) == 0) { |
5441 |
> |
if ((a = (s = a).parent) == null) { |
5442 |
> |
s.quietlyComplete(); |
5443 |
> |
break; |
5444 |
> |
} |
5445 |
> |
} |
5446 |
> |
else if (a.casPending(c, c - 1)) { |
5447 |
> |
if (subtasks != null && !inForkJoinPool()) { |
5448 |
> |
while ((s = a.parent) != null) |
5449 |
> |
a = s; |
5450 |
> |
while (!a.isDone()) { |
5451 |
> |
BulkAction<K,V,?> next = subtasks.nextTask; |
5452 |
> |
if (subtasks.tryUnfork()) |
5453 |
> |
subtasks.exec(); |
5454 |
> |
if ((subtasks = next) == null) |
5455 |
> |
break; |
5456 |
> |
} |
5457 |
> |
} |
5458 |
> |
break; |
5459 |
> |
} |
5460 |
|
} |
2375 |
– |
else |
2376 |
– |
break; |
5461 |
|
} |
5462 |
< |
if (p != null) { |
5463 |
< |
boolean init = false; |
5464 |
< |
int n; |
5465 |
< |
if (size >= (long)(MAXIMUM_CAPACITY >>> 1)) |
5466 |
< |
n = MAXIMUM_CAPACITY; |
5467 |
< |
else { |
5468 |
< |
int sz = (int)size; |
5469 |
< |
n = tableSizeFor(sz + (sz >>> 1) + 1); |
5462 |
> |
|
5463 |
> |
} |
5464 |
> |
|
5465 |
> |
/* |
5466 |
> |
* Task classes. Coded in a regular but ugly format/style to |
5467 |
> |
* simplify checks that each variant differs in the right way from |
5468 |
> |
* others. |
5469 |
> |
*/ |
5470 |
> |
|
5471 |
> |
@SuppressWarnings("serial") static final class ForEachKeyTask<K,V> |
5472 |
> |
extends BulkAction<K,V,Void> { |
5473 |
> |
final Action<K> action; |
5474 |
> |
ForEachKeyTask |
5475 |
> |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
5476 |
> |
ForEachKeyTask<K,V> nextTask, |
5477 |
> |
Action<K> action) { |
5478 |
> |
super(m, p, b, nextTask); |
5479 |
> |
this.action = action; |
5480 |
> |
} |
5481 |
> |
@SuppressWarnings("unchecked") public final boolean exec() { |
5482 |
> |
final Action<K> action = this.action; |
5483 |
> |
if (action == null) |
5484 |
> |
return abortOnNullFunction(); |
5485 |
> |
ForEachKeyTask<K,V> subtasks = null; |
5486 |
> |
try { |
5487 |
> |
int b = batch(), c; |
5488 |
> |
while (b > 1 && baseIndex != baseLimit) { |
5489 |
> |
do {} while (!casPending(c = pending, c+1)); |
5490 |
> |
(subtasks = new ForEachKeyTask<K,V> |
5491 |
> |
(map, this, b >>>= 1, subtasks, action)).fork(); |
5492 |
> |
} |
5493 |
> |
while (advance() != null) |
5494 |
> |
action.apply((K)nextKey); |
5495 |
> |
} catch (Throwable ex) { |
5496 |
> |
return tryCompleteComputation(ex); |
5497 |
|
} |
5498 |
< |
int sc = sizeCtl; |
5499 |
< |
if (n > sc && |
5500 |
< |
UNSAFE.compareAndSwapInt(this, sizeCtlOffset, sc, -1)) { |
5501 |
< |
try { |
5502 |
< |
if (table == null) { |
5503 |
< |
init = true; |
5504 |
< |
Node[] tab = new Node[n]; |
5505 |
< |
int mask = n - 1; |
5506 |
< |
while (p != null) { |
5507 |
< |
int j = p.hash & mask; |
5508 |
< |
Node next = p.next; |
5509 |
< |
p.next = tabAt(tab, j); |
5510 |
< |
setTabAt(tab, j, p); |
5511 |
< |
p = next; |
5498 |
> |
tryComplete(subtasks); |
5499 |
> |
return false; |
5500 |
> |
} |
5501 |
> |
} |
5502 |
> |
|
5503 |
> |
@SuppressWarnings("serial") static final class ForEachValueTask<K,V> |
5504 |
> |
extends BulkAction<K,V,Void> { |
5505 |
> |
final Action<V> action; |
5506 |
> |
ForEachValueTask |
5507 |
> |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
5508 |
> |
ForEachValueTask<K,V> nextTask, |
5509 |
> |
Action<V> action) { |
5510 |
> |
super(m, p, b, nextTask); |
5511 |
> |
this.action = action; |
5512 |
> |
} |
5513 |
> |
@SuppressWarnings("unchecked") public final boolean exec() { |
5514 |
> |
final Action<V> action = this.action; |
5515 |
> |
if (action == null) |
5516 |
> |
return abortOnNullFunction(); |
5517 |
> |
ForEachValueTask<K,V> subtasks = null; |
5518 |
> |
try { |
5519 |
> |
int b = batch(), c; |
5520 |
> |
while (b > 1 && baseIndex != baseLimit) { |
5521 |
> |
do {} while (!casPending(c = pending, c+1)); |
5522 |
> |
(subtasks = new ForEachValueTask<K,V> |
5523 |
> |
(map, this, b >>>= 1, subtasks, action)).fork(); |
5524 |
> |
} |
5525 |
> |
Object v; |
5526 |
> |
while ((v = advance()) != null) |
5527 |
> |
action.apply((V)v); |
5528 |
> |
} catch (Throwable ex) { |
5529 |
> |
return tryCompleteComputation(ex); |
5530 |
> |
} |
5531 |
> |
tryComplete(subtasks); |
5532 |
> |
return false; |
5533 |
> |
} |
5534 |
> |
} |
5535 |
> |
|
5536 |
> |
@SuppressWarnings("serial") static final class ForEachEntryTask<K,V> |
5537 |
> |
extends BulkAction<K,V,Void> { |
5538 |
> |
final Action<Entry<K,V>> action; |
5539 |
> |
ForEachEntryTask |
5540 |
> |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
5541 |
> |
ForEachEntryTask<K,V> nextTask, |
5542 |
> |
Action<Entry<K,V>> action) { |
5543 |
> |
super(m, p, b, nextTask); |
5544 |
> |
this.action = action; |
5545 |
> |
} |
5546 |
> |
@SuppressWarnings("unchecked") public final boolean exec() { |
5547 |
> |
final Action<Entry<K,V>> action = this.action; |
5548 |
> |
if (action == null) |
5549 |
> |
return abortOnNullFunction(); |
5550 |
> |
ForEachEntryTask<K,V> subtasks = null; |
5551 |
> |
try { |
5552 |
> |
int b = batch(), c; |
5553 |
> |
while (b > 1 && baseIndex != baseLimit) { |
5554 |
> |
do {} while (!casPending(c = pending, c+1)); |
5555 |
> |
(subtasks = new ForEachEntryTask<K,V> |
5556 |
> |
(map, this, b >>>= 1, subtasks, action)).fork(); |
5557 |
> |
} |
5558 |
> |
Object v; |
5559 |
> |
while ((v = advance()) != null) |
5560 |
> |
action.apply(entryFor((K)nextKey, (V)v)); |
5561 |
> |
} catch (Throwable ex) { |
5562 |
> |
return tryCompleteComputation(ex); |
5563 |
> |
} |
5564 |
> |
tryComplete(subtasks); |
5565 |
> |
return false; |
5566 |
> |
} |
5567 |
> |
} |
5568 |
> |
|
5569 |
> |
@SuppressWarnings("serial") static final class ForEachMappingTask<K,V> |
5570 |
> |
extends BulkAction<K,V,Void> { |
5571 |
> |
final BiAction<K,V> action; |
5572 |
> |
ForEachMappingTask |
5573 |
> |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
5574 |
> |
ForEachMappingTask<K,V> nextTask, |
5575 |
> |
BiAction<K,V> action) { |
5576 |
> |
super(m, p, b, nextTask); |
5577 |
> |
this.action = action; |
5578 |
> |
} |
5579 |
> |
@SuppressWarnings("unchecked") public final boolean exec() { |
5580 |
> |
final BiAction<K,V> action = this.action; |
5581 |
> |
if (action == null) |
5582 |
> |
return abortOnNullFunction(); |
5583 |
> |
ForEachMappingTask<K,V> subtasks = null; |
5584 |
> |
try { |
5585 |
> |
int b = batch(), c; |
5586 |
> |
while (b > 1 && baseIndex != baseLimit) { |
5587 |
> |
do {} while (!casPending(c = pending, c+1)); |
5588 |
> |
(subtasks = new ForEachMappingTask<K,V> |
5589 |
> |
(map, this, b >>>= 1, subtasks, action)).fork(); |
5590 |
> |
} |
5591 |
> |
Object v; |
5592 |
> |
while ((v = advance()) != null) |
5593 |
> |
action.apply((K)nextKey, (V)v); |
5594 |
> |
} catch (Throwable ex) { |
5595 |
> |
return tryCompleteComputation(ex); |
5596 |
> |
} |
5597 |
> |
tryComplete(subtasks); |
5598 |
> |
return false; |
5599 |
> |
} |
5600 |
> |
} |
5601 |
> |
|
5602 |
> |
@SuppressWarnings("serial") static final class ForEachTransformedKeyTask<K,V,U> |
5603 |
> |
extends BulkAction<K,V,Void> { |
5604 |
> |
final Fun<? super K, ? extends U> transformer; |
5605 |
> |
final Action<U> action; |
5606 |
> |
ForEachTransformedKeyTask |
5607 |
> |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
5608 |
> |
ForEachTransformedKeyTask<K,V,U> nextTask, |
5609 |
> |
Fun<? super K, ? extends U> transformer, |
5610 |
> |
Action<U> action) { |
5611 |
> |
super(m, p, b, nextTask); |
5612 |
> |
this.transformer = transformer; |
5613 |
> |
this.action = action; |
5614 |
> |
|
5615 |
> |
} |
5616 |
> |
@SuppressWarnings("unchecked") public final boolean exec() { |
5617 |
> |
final Fun<? super K, ? extends U> transformer = |
5618 |
> |
this.transformer; |
5619 |
> |
final Action<U> action = this.action; |
5620 |
> |
if (transformer == null || action == null) |
5621 |
> |
return abortOnNullFunction(); |
5622 |
> |
ForEachTransformedKeyTask<K,V,U> subtasks = null; |
5623 |
> |
try { |
5624 |
> |
int b = batch(), c; |
5625 |
> |
while (b > 1 && baseIndex != baseLimit) { |
5626 |
> |
do {} while (!casPending(c = pending, c+1)); |
5627 |
> |
(subtasks = new ForEachTransformedKeyTask<K,V,U> |
5628 |
> |
(map, this, b >>>= 1, subtasks, transformer, action)).fork(); |
5629 |
> |
} |
5630 |
> |
U u; |
5631 |
> |
while (advance() != null) { |
5632 |
> |
if ((u = transformer.apply((K)nextKey)) != null) |
5633 |
> |
action.apply(u); |
5634 |
> |
} |
5635 |
> |
} catch (Throwable ex) { |
5636 |
> |
return tryCompleteComputation(ex); |
5637 |
> |
} |
5638 |
> |
tryComplete(subtasks); |
5639 |
> |
return false; |
5640 |
> |
} |
5641 |
> |
} |
5642 |
> |
|
5643 |
> |
@SuppressWarnings("serial") static final class ForEachTransformedValueTask<K,V,U> |
5644 |
> |
extends BulkAction<K,V,Void> { |
5645 |
> |
final Fun<? super V, ? extends U> transformer; |
5646 |
> |
final Action<U> action; |
5647 |
> |
ForEachTransformedValueTask |
5648 |
> |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
5649 |
> |
ForEachTransformedValueTask<K,V,U> nextTask, |
5650 |
> |
Fun<? super V, ? extends U> transformer, |
5651 |
> |
Action<U> action) { |
5652 |
> |
super(m, p, b, nextTask); |
5653 |
> |
this.transformer = transformer; |
5654 |
> |
this.action = action; |
5655 |
> |
|
5656 |
> |
} |
5657 |
> |
@SuppressWarnings("unchecked") public final boolean exec() { |
5658 |
> |
final Fun<? super V, ? extends U> transformer = |
5659 |
> |
this.transformer; |
5660 |
> |
final Action<U> action = this.action; |
5661 |
> |
if (transformer == null || action == null) |
5662 |
> |
return abortOnNullFunction(); |
5663 |
> |
ForEachTransformedValueTask<K,V,U> subtasks = null; |
5664 |
> |
try { |
5665 |
> |
int b = batch(), c; |
5666 |
> |
while (b > 1 && baseIndex != baseLimit) { |
5667 |
> |
do {} while (!casPending(c = pending, c+1)); |
5668 |
> |
(subtasks = new ForEachTransformedValueTask<K,V,U> |
5669 |
> |
(map, this, b >>>= 1, subtasks, transformer, action)).fork(); |
5670 |
> |
} |
5671 |
> |
Object v; U u; |
5672 |
> |
while ((v = advance()) != null) { |
5673 |
> |
if ((u = transformer.apply((V)v)) != null) |
5674 |
> |
action.apply(u); |
5675 |
> |
} |
5676 |
> |
} catch (Throwable ex) { |
5677 |
> |
return tryCompleteComputation(ex); |
5678 |
> |
} |
5679 |
> |
tryComplete(subtasks); |
5680 |
> |
return false; |
5681 |
> |
} |
5682 |
> |
} |
5683 |
> |
|
5684 |
> |
@SuppressWarnings("serial") static final class ForEachTransformedEntryTask<K,V,U> |
5685 |
> |
extends BulkAction<K,V,Void> { |
5686 |
> |
final Fun<Map.Entry<K,V>, ? extends U> transformer; |
5687 |
> |
final Action<U> action; |
5688 |
> |
ForEachTransformedEntryTask |
5689 |
> |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
5690 |
> |
ForEachTransformedEntryTask<K,V,U> nextTask, |
5691 |
> |
Fun<Map.Entry<K,V>, ? extends U> transformer, |
5692 |
> |
Action<U> action) { |
5693 |
> |
super(m, p, b, nextTask); |
5694 |
> |
this.transformer = transformer; |
5695 |
> |
this.action = action; |
5696 |
> |
|
5697 |
> |
} |
5698 |
> |
@SuppressWarnings("unchecked") public final boolean exec() { |
5699 |
> |
final Fun<Map.Entry<K,V>, ? extends U> transformer = |
5700 |
> |
this.transformer; |
5701 |
> |
final Action<U> action = this.action; |
5702 |
> |
if (transformer == null || action == null) |
5703 |
> |
return abortOnNullFunction(); |
5704 |
> |
ForEachTransformedEntryTask<K,V,U> subtasks = null; |
5705 |
> |
try { |
5706 |
> |
int b = batch(), c; |
5707 |
> |
while (b > 1 && baseIndex != baseLimit) { |
5708 |
> |
do {} while (!casPending(c = pending, c+1)); |
5709 |
> |
(subtasks = new ForEachTransformedEntryTask<K,V,U> |
5710 |
> |
(map, this, b >>>= 1, subtasks, transformer, action)).fork(); |
5711 |
> |
} |
5712 |
> |
Object v; U u; |
5713 |
> |
while ((v = advance()) != null) { |
5714 |
> |
if ((u = transformer.apply(entryFor((K)nextKey, (V)v))) != null) |
5715 |
> |
action.apply(u); |
5716 |
> |
} |
5717 |
> |
} catch (Throwable ex) { |
5718 |
> |
return tryCompleteComputation(ex); |
5719 |
> |
} |
5720 |
> |
tryComplete(subtasks); |
5721 |
> |
return false; |
5722 |
> |
} |
5723 |
> |
} |
5724 |
> |
|
5725 |
> |
@SuppressWarnings("serial") static final class ForEachTransformedMappingTask<K,V,U> |
5726 |
> |
extends BulkAction<K,V,Void> { |
5727 |
> |
final BiFun<? super K, ? super V, ? extends U> transformer; |
5728 |
> |
final Action<U> action; |
5729 |
> |
ForEachTransformedMappingTask |
5730 |
> |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
5731 |
> |
ForEachTransformedMappingTask<K,V,U> nextTask, |
5732 |
> |
BiFun<? super K, ? super V, ? extends U> transformer, |
5733 |
> |
Action<U> action) { |
5734 |
> |
super(m, p, b, nextTask); |
5735 |
> |
this.transformer = transformer; |
5736 |
> |
this.action = action; |
5737 |
> |
|
5738 |
> |
} |
5739 |
> |
@SuppressWarnings("unchecked") public final boolean exec() { |
5740 |
> |
final BiFun<? super K, ? super V, ? extends U> transformer = |
5741 |
> |
this.transformer; |
5742 |
> |
final Action<U> action = this.action; |
5743 |
> |
if (transformer == null || action == null) |
5744 |
> |
return abortOnNullFunction(); |
5745 |
> |
ForEachTransformedMappingTask<K,V,U> subtasks = null; |
5746 |
> |
try { |
5747 |
> |
int b = batch(), c; |
5748 |
> |
while (b > 1 && baseIndex != baseLimit) { |
5749 |
> |
do {} while (!casPending(c = pending, c+1)); |
5750 |
> |
(subtasks = new ForEachTransformedMappingTask<K,V,U> |
5751 |
> |
(map, this, b >>>= 1, subtasks, transformer, action)).fork(); |
5752 |
> |
} |
5753 |
> |
Object v; U u; |
5754 |
> |
while ((v = advance()) != null) { |
5755 |
> |
if ((u = transformer.apply((K)nextKey, (V)v)) != null) |
5756 |
> |
action.apply(u); |
5757 |
> |
} |
5758 |
> |
} catch (Throwable ex) { |
5759 |
> |
return tryCompleteComputation(ex); |
5760 |
> |
} |
5761 |
> |
tryComplete(subtasks); |
5762 |
> |
return false; |
5763 |
> |
} |
5764 |
> |
} |
5765 |
> |
|
5766 |
> |
@SuppressWarnings("serial") static final class SearchKeysTask<K,V,U> |
5767 |
> |
extends BulkAction<K,V,U> { |
5768 |
> |
final Fun<? super K, ? extends U> searchFunction; |
5769 |
> |
final AtomicReference<U> result; |
5770 |
> |
SearchKeysTask |
5771 |
> |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
5772 |
> |
SearchKeysTask<K,V,U> nextTask, |
5773 |
> |
Fun<? super K, ? extends U> searchFunction, |
5774 |
> |
AtomicReference<U> result) { |
5775 |
> |
super(m, p, b, nextTask); |
5776 |
> |
this.searchFunction = searchFunction; this.result = result; |
5777 |
> |
} |
5778 |
> |
@SuppressWarnings("unchecked") public final boolean exec() { |
5779 |
> |
AtomicReference<U> result = this.result; |
5780 |
> |
final Fun<? super K, ? extends U> searchFunction = |
5781 |
> |
this.searchFunction; |
5782 |
> |
if (searchFunction == null || result == null) |
5783 |
> |
return abortOnNullFunction(); |
5784 |
> |
SearchKeysTask<K,V,U> subtasks = null; |
5785 |
> |
try { |
5786 |
> |
int b = batch(), c; |
5787 |
> |
while (b > 1 && baseIndex != baseLimit && result.get() == null) { |
5788 |
> |
do {} while (!casPending(c = pending, c+1)); |
5789 |
> |
(subtasks = new SearchKeysTask<K,V,U> |
5790 |
> |
(map, this, b >>>= 1, subtasks, searchFunction, result)).fork(); |
5791 |
> |
} |
5792 |
> |
U u; |
5793 |
> |
while (result.get() == null && advance() != null) { |
5794 |
> |
if ((u = searchFunction.apply((K)nextKey)) != null) { |
5795 |
> |
if (result.compareAndSet(null, u)) |
5796 |
> |
tryCompleteComputation(null); |
5797 |
> |
break; |
5798 |
> |
} |
5799 |
> |
} |
5800 |
> |
} catch (Throwable ex) { |
5801 |
> |
return tryCompleteComputation(ex); |
5802 |
> |
} |
5803 |
> |
tryComplete(subtasks); |
5804 |
> |
return false; |
5805 |
> |
} |
5806 |
> |
public final U getRawResult() { return result.get(); } |
5807 |
> |
} |
5808 |
> |
|
5809 |
> |
@SuppressWarnings("serial") static final class SearchValuesTask<K,V,U> |
5810 |
> |
extends BulkAction<K,V,U> { |
5811 |
> |
final Fun<? super V, ? extends U> searchFunction; |
5812 |
> |
final AtomicReference<U> result; |
5813 |
> |
SearchValuesTask |
5814 |
> |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
5815 |
> |
SearchValuesTask<K,V,U> nextTask, |
5816 |
> |
Fun<? super V, ? extends U> searchFunction, |
5817 |
> |
AtomicReference<U> result) { |
5818 |
> |
super(m, p, b, nextTask); |
5819 |
> |
this.searchFunction = searchFunction; this.result = result; |
5820 |
> |
} |
5821 |
> |
@SuppressWarnings("unchecked") public final boolean exec() { |
5822 |
> |
AtomicReference<U> result = this.result; |
5823 |
> |
final Fun<? super V, ? extends U> searchFunction = |
5824 |
> |
this.searchFunction; |
5825 |
> |
if (searchFunction == null || result == null) |
5826 |
> |
return abortOnNullFunction(); |
5827 |
> |
SearchValuesTask<K,V,U> subtasks = null; |
5828 |
> |
try { |
5829 |
> |
int b = batch(), c; |
5830 |
> |
while (b > 1 && baseIndex != baseLimit && result.get() == null) { |
5831 |
> |
do {} while (!casPending(c = pending, c+1)); |
5832 |
> |
(subtasks = new SearchValuesTask<K,V,U> |
5833 |
> |
(map, this, b >>>= 1, subtasks, searchFunction, result)).fork(); |
5834 |
> |
} |
5835 |
> |
Object v; U u; |
5836 |
> |
while (result.get() == null && (v = advance()) != null) { |
5837 |
> |
if ((u = searchFunction.apply((V)v)) != null) { |
5838 |
> |
if (result.compareAndSet(null, u)) |
5839 |
> |
tryCompleteComputation(null); |
5840 |
> |
break; |
5841 |
> |
} |
5842 |
> |
} |
5843 |
> |
} catch (Throwable ex) { |
5844 |
> |
return tryCompleteComputation(ex); |
5845 |
> |
} |
5846 |
> |
tryComplete(subtasks); |
5847 |
> |
return false; |
5848 |
> |
} |
5849 |
> |
public final U getRawResult() { return result.get(); } |
5850 |
> |
} |
5851 |
> |
|
5852 |
> |
@SuppressWarnings("serial") static final class SearchEntriesTask<K,V,U> |
5853 |
> |
extends BulkAction<K,V,U> { |
5854 |
> |
final Fun<Entry<K,V>, ? extends U> searchFunction; |
5855 |
> |
final AtomicReference<U> result; |
5856 |
> |
SearchEntriesTask |
5857 |
> |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
5858 |
> |
SearchEntriesTask<K,V,U> nextTask, |
5859 |
> |
Fun<Entry<K,V>, ? extends U> searchFunction, |
5860 |
> |
AtomicReference<U> result) { |
5861 |
> |
super(m, p, b, nextTask); |
5862 |
> |
this.searchFunction = searchFunction; this.result = result; |
5863 |
> |
} |
5864 |
> |
@SuppressWarnings("unchecked") public final boolean exec() { |
5865 |
> |
AtomicReference<U> result = this.result; |
5866 |
> |
final Fun<Entry<K,V>, ? extends U> searchFunction = |
5867 |
> |
this.searchFunction; |
5868 |
> |
if (searchFunction == null || result == null) |
5869 |
> |
return abortOnNullFunction(); |
5870 |
> |
SearchEntriesTask<K,V,U> subtasks = null; |
5871 |
> |
try { |
5872 |
> |
int b = batch(), c; |
5873 |
> |
while (b > 1 && baseIndex != baseLimit && result.get() == null) { |
5874 |
> |
do {} while (!casPending(c = pending, c+1)); |
5875 |
> |
(subtasks = new SearchEntriesTask<K,V,U> |
5876 |
> |
(map, this, b >>>= 1, subtasks, searchFunction, result)).fork(); |
5877 |
> |
} |
5878 |
> |
Object v; U u; |
5879 |
> |
while (result.get() == null && (v = advance()) != null) { |
5880 |
> |
if ((u = searchFunction.apply(entryFor((K)nextKey, (V)v))) != null) { |
5881 |
> |
if (result.compareAndSet(null, u)) |
5882 |
> |
tryCompleteComputation(null); |
5883 |
> |
break; |
5884 |
> |
} |
5885 |
> |
} |
5886 |
> |
} catch (Throwable ex) { |
5887 |
> |
return tryCompleteComputation(ex); |
5888 |
> |
} |
5889 |
> |
tryComplete(subtasks); |
5890 |
> |
return false; |
5891 |
> |
} |
5892 |
> |
public final U getRawResult() { return result.get(); } |
5893 |
> |
} |
5894 |
> |
|
5895 |
> |
@SuppressWarnings("serial") static final class SearchMappingsTask<K,V,U> |
5896 |
> |
extends BulkAction<K,V,U> { |
5897 |
> |
final BiFun<? super K, ? super V, ? extends U> searchFunction; |
5898 |
> |
final AtomicReference<U> result; |
5899 |
> |
SearchMappingsTask |
5900 |
> |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
5901 |
> |
SearchMappingsTask<K,V,U> nextTask, |
5902 |
> |
BiFun<? super K, ? super V, ? extends U> searchFunction, |
5903 |
> |
AtomicReference<U> result) { |
5904 |
> |
super(m, p, b, nextTask); |
5905 |
> |
this.searchFunction = searchFunction; this.result = result; |
5906 |
> |
} |
5907 |
> |
@SuppressWarnings("unchecked") public final boolean exec() { |
5908 |
> |
AtomicReference<U> result = this.result; |
5909 |
> |
final BiFun<? super K, ? super V, ? extends U> searchFunction = |
5910 |
> |
this.searchFunction; |
5911 |
> |
if (searchFunction == null || result == null) |
5912 |
> |
return abortOnNullFunction(); |
5913 |
> |
SearchMappingsTask<K,V,U> subtasks = null; |
5914 |
> |
try { |
5915 |
> |
int b = batch(), c; |
5916 |
> |
while (b > 1 && baseIndex != baseLimit && result.get() == null) { |
5917 |
> |
do {} while (!casPending(c = pending, c+1)); |
5918 |
> |
(subtasks = new SearchMappingsTask<K,V,U> |
5919 |
> |
(map, this, b >>>= 1, subtasks, searchFunction, result)).fork(); |
5920 |
> |
} |
5921 |
> |
Object v; U u; |
5922 |
> |
while (result.get() == null && (v = advance()) != null) { |
5923 |
> |
if ((u = searchFunction.apply((K)nextKey, (V)v)) != null) { |
5924 |
> |
if (result.compareAndSet(null, u)) |
5925 |
> |
tryCompleteComputation(null); |
5926 |
> |
break; |
5927 |
> |
} |
5928 |
> |
} |
5929 |
> |
} catch (Throwable ex) { |
5930 |
> |
return tryCompleteComputation(ex); |
5931 |
> |
} |
5932 |
> |
tryComplete(subtasks); |
5933 |
> |
return false; |
5934 |
> |
} |
5935 |
> |
public final U getRawResult() { return result.get(); } |
5936 |
> |
} |
5937 |
> |
|
5938 |
> |
@SuppressWarnings("serial") static final class ReduceKeysTask<K,V> |
5939 |
> |
extends BulkTask<K,V,K> { |
5940 |
> |
final BiFun<? super K, ? super K, ? extends K> reducer; |
5941 |
> |
K result; |
5942 |
> |
ReduceKeysTask<K,V> rights, nextRight; |
5943 |
> |
ReduceKeysTask |
5944 |
> |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
5945 |
> |
ReduceKeysTask<K,V> nextRight, |
5946 |
> |
BiFun<? super K, ? super K, ? extends K> reducer) { |
5947 |
> |
super(m, p, b); this.nextRight = nextRight; |
5948 |
> |
this.reducer = reducer; |
5949 |
> |
} |
5950 |
> |
@SuppressWarnings("unchecked") public final boolean exec() { |
5951 |
> |
final BiFun<? super K, ? super K, ? extends K> reducer = |
5952 |
> |
this.reducer; |
5953 |
> |
if (reducer == null) |
5954 |
> |
return abortOnNullFunction(); |
5955 |
> |
try { |
5956 |
> |
for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) { |
5957 |
> |
do {} while (!casPending(c = pending, c+1)); |
5958 |
> |
(rights = new ReduceKeysTask<K,V> |
5959 |
> |
(map, this, b >>>= 1, rights, reducer)).fork(); |
5960 |
> |
} |
5961 |
> |
K r = null; |
5962 |
> |
while (advance() != null) { |
5963 |
> |
K u = (K)nextKey; |
5964 |
> |
r = (r == null) ? u : reducer.apply(r, u); |
5965 |
> |
} |
5966 |
> |
result = r; |
5967 |
> |
for (ReduceKeysTask<K,V> t = this, s;;) { |
5968 |
> |
int c; BulkTask<K,V,?> par; K tr, sr; |
5969 |
> |
if ((c = t.pending) == 0) { |
5970 |
> |
for (s = t.rights; s != null; s = t.rights = s.nextRight) { |
5971 |
> |
if ((sr = s.result) != null) |
5972 |
> |
t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr); |
5973 |
|
} |
5974 |
< |
table = tab; |
5975 |
< |
counter.add(size); |
5976 |
< |
sc = n - (n >>> 2); |
5974 |
> |
if ((par = t.parent) == null || |
5975 |
> |
!(par instanceof ReduceKeysTask)) { |
5976 |
> |
t.quietlyComplete(); |
5977 |
> |
break; |
5978 |
> |
} |
5979 |
> |
t = (ReduceKeysTask<K,V>)par; |
5980 |
|
} |
5981 |
< |
} finally { |
5982 |
< |
sizeCtl = sc; |
5981 |
> |
else if (t.casPending(c, c - 1)) |
5982 |
> |
break; |
5983 |
|
} |
5984 |
+ |
} catch (Throwable ex) { |
5985 |
+ |
return tryCompleteComputation(ex); |
5986 |
|
} |
5987 |
< |
if (!init) { // Can only happen if unsafely published. |
5988 |
< |
while (p != null) { |
5989 |
< |
internalPut(p.key, p.val); |
5990 |
< |
p = p.next; |
5987 |
> |
ReduceKeysTask<K,V> s = rights; |
5988 |
> |
if (s != null && !inForkJoinPool()) { |
5989 |
> |
do { |
5990 |
> |
if (s.tryUnfork()) |
5991 |
> |
s.exec(); |
5992 |
> |
} while ((s = s.nextRight) != null); |
5993 |
> |
} |
5994 |
> |
return false; |
5995 |
> |
} |
5996 |
> |
public final K getRawResult() { return result; } |
5997 |
> |
} |
5998 |
> |
|
5999 |
> |
@SuppressWarnings("serial") static final class ReduceValuesTask<K,V> |
6000 |
> |
extends BulkTask<K,V,V> { |
6001 |
> |
final BiFun<? super V, ? super V, ? extends V> reducer; |
6002 |
> |
V result; |
6003 |
> |
ReduceValuesTask<K,V> rights, nextRight; |
6004 |
> |
ReduceValuesTask |
6005 |
> |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
6006 |
> |
ReduceValuesTask<K,V> nextRight, |
6007 |
> |
BiFun<? super V, ? super V, ? extends V> reducer) { |
6008 |
> |
super(m, p, b); this.nextRight = nextRight; |
6009 |
> |
this.reducer = reducer; |
6010 |
> |
} |
6011 |
> |
@SuppressWarnings("unchecked") public final boolean exec() { |
6012 |
> |
final BiFun<? super V, ? super V, ? extends V> reducer = |
6013 |
> |
this.reducer; |
6014 |
> |
if (reducer == null) |
6015 |
> |
return abortOnNullFunction(); |
6016 |
> |
try { |
6017 |
> |
for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) { |
6018 |
> |
do {} while (!casPending(c = pending, c+1)); |
6019 |
> |
(rights = new ReduceValuesTask<K,V> |
6020 |
> |
(map, this, b >>>= 1, rights, reducer)).fork(); |
6021 |
|
} |
6022 |
+ |
V r = null; |
6023 |
+ |
Object v; |
6024 |
+ |
while ((v = advance()) != null) { |
6025 |
+ |
V u = (V)v; |
6026 |
+ |
r = (r == null) ? u : reducer.apply(r, u); |
6027 |
+ |
} |
6028 |
+ |
result = r; |
6029 |
+ |
for (ReduceValuesTask<K,V> t = this, s;;) { |
6030 |
+ |
int c; BulkTask<K,V,?> par; V tr, sr; |
6031 |
+ |
if ((c = t.pending) == 0) { |
6032 |
+ |
for (s = t.rights; s != null; s = t.rights = s.nextRight) { |
6033 |
+ |
if ((sr = s.result) != null) |
6034 |
+ |
t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr); |
6035 |
+ |
} |
6036 |
+ |
if ((par = t.parent) == null || |
6037 |
+ |
!(par instanceof ReduceValuesTask)) { |
6038 |
+ |
t.quietlyComplete(); |
6039 |
+ |
break; |
6040 |
+ |
} |
6041 |
+ |
t = (ReduceValuesTask<K,V>)par; |
6042 |
+ |
} |
6043 |
+ |
else if (t.casPending(c, c - 1)) |
6044 |
+ |
break; |
6045 |
+ |
} |
6046 |
+ |
} catch (Throwable ex) { |
6047 |
+ |
return tryCompleteComputation(ex); |
6048 |
+ |
} |
6049 |
+ |
ReduceValuesTask<K,V> s = rights; |
6050 |
+ |
if (s != null && !inForkJoinPool()) { |
6051 |
+ |
do { |
6052 |
+ |
if (s.tryUnfork()) |
6053 |
+ |
s.exec(); |
6054 |
+ |
} while ((s = s.nextRight) != null); |
6055 |
|
} |
6056 |
+ |
return false; |
6057 |
|
} |
6058 |
+ |
public final V getRawResult() { return result; } |
6059 |
+ |
} |
6060 |
+ |
|
6061 |
+ |
@SuppressWarnings("serial") static final class ReduceEntriesTask<K,V> |
6062 |
+ |
extends BulkTask<K,V,Map.Entry<K,V>> { |
6063 |
+ |
final BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer; |
6064 |
+ |
Map.Entry<K,V> result; |
6065 |
+ |
ReduceEntriesTask<K,V> rights, nextRight; |
6066 |
+ |
ReduceEntriesTask |
6067 |
+ |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
6068 |
+ |
ReduceEntriesTask<K,V> nextRight, |
6069 |
+ |
BiFun<Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) { |
6070 |
+ |
super(m, p, b); this.nextRight = nextRight; |
6071 |
+ |
this.reducer = reducer; |
6072 |
+ |
} |
6073 |
+ |
@SuppressWarnings("unchecked") public final boolean exec() { |
6074 |
+ |
final BiFun<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer = |
6075 |
+ |
this.reducer; |
6076 |
+ |
if (reducer == null) |
6077 |
+ |
return abortOnNullFunction(); |
6078 |
+ |
try { |
6079 |
+ |
for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) { |
6080 |
+ |
do {} while (!casPending(c = pending, c+1)); |
6081 |
+ |
(rights = new ReduceEntriesTask<K,V> |
6082 |
+ |
(map, this, b >>>= 1, rights, reducer)).fork(); |
6083 |
+ |
} |
6084 |
+ |
Map.Entry<K,V> r = null; |
6085 |
+ |
Object v; |
6086 |
+ |
while ((v = advance()) != null) { |
6087 |
+ |
Map.Entry<K,V> u = entryFor((K)nextKey, (V)v); |
6088 |
+ |
r = (r == null) ? u : reducer.apply(r, u); |
6089 |
+ |
} |
6090 |
+ |
result = r; |
6091 |
+ |
for (ReduceEntriesTask<K,V> t = this, s;;) { |
6092 |
+ |
int c; BulkTask<K,V,?> par; Map.Entry<K,V> tr, sr; |
6093 |
+ |
if ((c = t.pending) == 0) { |
6094 |
+ |
for (s = t.rights; s != null; s = t.rights = s.nextRight) { |
6095 |
+ |
if ((sr = s.result) != null) |
6096 |
+ |
t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr); |
6097 |
+ |
} |
6098 |
+ |
if ((par = t.parent) == null || |
6099 |
+ |
!(par instanceof ReduceEntriesTask)) { |
6100 |
+ |
t.quietlyComplete(); |
6101 |
+ |
break; |
6102 |
+ |
} |
6103 |
+ |
t = (ReduceEntriesTask<K,V>)par; |
6104 |
+ |
} |
6105 |
+ |
else if (t.casPending(c, c - 1)) |
6106 |
+ |
break; |
6107 |
+ |
} |
6108 |
+ |
} catch (Throwable ex) { |
6109 |
+ |
return tryCompleteComputation(ex); |
6110 |
+ |
} |
6111 |
+ |
ReduceEntriesTask<K,V> s = rights; |
6112 |
+ |
if (s != null && !inForkJoinPool()) { |
6113 |
+ |
do { |
6114 |
+ |
if (s.tryUnfork()) |
6115 |
+ |
s.exec(); |
6116 |
+ |
} while ((s = s.nextRight) != null); |
6117 |
+ |
} |
6118 |
+ |
return false; |
6119 |
+ |
} |
6120 |
+ |
public final Map.Entry<K,V> getRawResult() { return result; } |
6121 |
+ |
} |
6122 |
+ |
|
6123 |
+ |
@SuppressWarnings("serial") static final class MapReduceKeysTask<K,V,U> |
6124 |
+ |
extends BulkTask<K,V,U> { |
6125 |
+ |
final Fun<? super K, ? extends U> transformer; |
6126 |
+ |
final BiFun<? super U, ? super U, ? extends U> reducer; |
6127 |
+ |
U result; |
6128 |
+ |
MapReduceKeysTask<K,V,U> rights, nextRight; |
6129 |
+ |
MapReduceKeysTask |
6130 |
+ |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
6131 |
+ |
MapReduceKeysTask<K,V,U> nextRight, |
6132 |
+ |
Fun<? super K, ? extends U> transformer, |
6133 |
+ |
BiFun<? super U, ? super U, ? extends U> reducer) { |
6134 |
+ |
super(m, p, b); this.nextRight = nextRight; |
6135 |
+ |
this.transformer = transformer; |
6136 |
+ |
this.reducer = reducer; |
6137 |
+ |
} |
6138 |
+ |
@SuppressWarnings("unchecked") public final boolean exec() { |
6139 |
+ |
final Fun<? super K, ? extends U> transformer = |
6140 |
+ |
this.transformer; |
6141 |
+ |
final BiFun<? super U, ? super U, ? extends U> reducer = |
6142 |
+ |
this.reducer; |
6143 |
+ |
if (transformer == null || reducer == null) |
6144 |
+ |
return abortOnNullFunction(); |
6145 |
+ |
try { |
6146 |
+ |
for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) { |
6147 |
+ |
do {} while (!casPending(c = pending, c+1)); |
6148 |
+ |
(rights = new MapReduceKeysTask<K,V,U> |
6149 |
+ |
(map, this, b >>>= 1, rights, transformer, reducer)).fork(); |
6150 |
+ |
} |
6151 |
+ |
U r = null, u; |
6152 |
+ |
while (advance() != null) { |
6153 |
+ |
if ((u = transformer.apply((K)nextKey)) != null) |
6154 |
+ |
r = (r == null) ? u : reducer.apply(r, u); |
6155 |
+ |
} |
6156 |
+ |
result = r; |
6157 |
+ |
for (MapReduceKeysTask<K,V,U> t = this, s;;) { |
6158 |
+ |
int c; BulkTask<K,V,?> par; U tr, sr; |
6159 |
+ |
if ((c = t.pending) == 0) { |
6160 |
+ |
for (s = t.rights; s != null; s = t.rights = s.nextRight) { |
6161 |
+ |
if ((sr = s.result) != null) |
6162 |
+ |
t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr); |
6163 |
+ |
} |
6164 |
+ |
if ((par = t.parent) == null || |
6165 |
+ |
!(par instanceof MapReduceKeysTask)) { |
6166 |
+ |
t.quietlyComplete(); |
6167 |
+ |
break; |
6168 |
+ |
} |
6169 |
+ |
t = (MapReduceKeysTask<K,V,U>)par; |
6170 |
+ |
} |
6171 |
+ |
else if (t.casPending(c, c - 1)) |
6172 |
+ |
break; |
6173 |
+ |
} |
6174 |
+ |
} catch (Throwable ex) { |
6175 |
+ |
return tryCompleteComputation(ex); |
6176 |
+ |
} |
6177 |
+ |
MapReduceKeysTask<K,V,U> s = rights; |
6178 |
+ |
if (s != null && !inForkJoinPool()) { |
6179 |
+ |
do { |
6180 |
+ |
if (s.tryUnfork()) |
6181 |
+ |
s.exec(); |
6182 |
+ |
} while ((s = s.nextRight) != null); |
6183 |
+ |
} |
6184 |
+ |
return false; |
6185 |
+ |
} |
6186 |
+ |
public final U getRawResult() { return result; } |
6187 |
+ |
} |
6188 |
+ |
|
6189 |
+ |
@SuppressWarnings("serial") static final class MapReduceValuesTask<K,V,U> |
6190 |
+ |
extends BulkTask<K,V,U> { |
6191 |
+ |
final Fun<? super V, ? extends U> transformer; |
6192 |
+ |
final BiFun<? super U, ? super U, ? extends U> reducer; |
6193 |
+ |
U result; |
6194 |
+ |
MapReduceValuesTask<K,V,U> rights, nextRight; |
6195 |
+ |
MapReduceValuesTask |
6196 |
+ |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
6197 |
+ |
MapReduceValuesTask<K,V,U> nextRight, |
6198 |
+ |
Fun<? super V, ? extends U> transformer, |
6199 |
+ |
BiFun<? super U, ? super U, ? extends U> reducer) { |
6200 |
+ |
super(m, p, b); this.nextRight = nextRight; |
6201 |
+ |
this.transformer = transformer; |
6202 |
+ |
this.reducer = reducer; |
6203 |
+ |
} |
6204 |
+ |
@SuppressWarnings("unchecked") public final boolean exec() { |
6205 |
+ |
final Fun<? super V, ? extends U> transformer = |
6206 |
+ |
this.transformer; |
6207 |
+ |
final BiFun<? super U, ? super U, ? extends U> reducer = |
6208 |
+ |
this.reducer; |
6209 |
+ |
if (transformer == null || reducer == null) |
6210 |
+ |
return abortOnNullFunction(); |
6211 |
+ |
try { |
6212 |
+ |
for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) { |
6213 |
+ |
do {} while (!casPending(c = pending, c+1)); |
6214 |
+ |
(rights = new MapReduceValuesTask<K,V,U> |
6215 |
+ |
(map, this, b >>>= 1, rights, transformer, reducer)).fork(); |
6216 |
+ |
} |
6217 |
+ |
U r = null, u; |
6218 |
+ |
Object v; |
6219 |
+ |
while ((v = advance()) != null) { |
6220 |
+ |
if ((u = transformer.apply((V)v)) != null) |
6221 |
+ |
r = (r == null) ? u : reducer.apply(r, u); |
6222 |
+ |
} |
6223 |
+ |
result = r; |
6224 |
+ |
for (MapReduceValuesTask<K,V,U> t = this, s;;) { |
6225 |
+ |
int c; BulkTask<K,V,?> par; U tr, sr; |
6226 |
+ |
if ((c = t.pending) == 0) { |
6227 |
+ |
for (s = t.rights; s != null; s = t.rights = s.nextRight) { |
6228 |
+ |
if ((sr = s.result) != null) |
6229 |
+ |
t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr); |
6230 |
+ |
} |
6231 |
+ |
if ((par = t.parent) == null || |
6232 |
+ |
!(par instanceof MapReduceValuesTask)) { |
6233 |
+ |
t.quietlyComplete(); |
6234 |
+ |
break; |
6235 |
+ |
} |
6236 |
+ |
t = (MapReduceValuesTask<K,V,U>)par; |
6237 |
+ |
} |
6238 |
+ |
else if (t.casPending(c, c - 1)) |
6239 |
+ |
break; |
6240 |
+ |
} |
6241 |
+ |
} catch (Throwable ex) { |
6242 |
+ |
return tryCompleteComputation(ex); |
6243 |
+ |
} |
6244 |
+ |
MapReduceValuesTask<K,V,U> s = rights; |
6245 |
+ |
if (s != null && !inForkJoinPool()) { |
6246 |
+ |
do { |
6247 |
+ |
if (s.tryUnfork()) |
6248 |
+ |
s.exec(); |
6249 |
+ |
} while ((s = s.nextRight) != null); |
6250 |
+ |
} |
6251 |
+ |
return false; |
6252 |
+ |
} |
6253 |
+ |
public final U getRawResult() { return result; } |
6254 |
+ |
} |
6255 |
+ |
|
6256 |
+ |
@SuppressWarnings("serial") static final class MapReduceEntriesTask<K,V,U> |
6257 |
+ |
extends BulkTask<K,V,U> { |
6258 |
+ |
final Fun<Map.Entry<K,V>, ? extends U> transformer; |
6259 |
+ |
final BiFun<? super U, ? super U, ? extends U> reducer; |
6260 |
+ |
U result; |
6261 |
+ |
MapReduceEntriesTask<K,V,U> rights, nextRight; |
6262 |
+ |
MapReduceEntriesTask |
6263 |
+ |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
6264 |
+ |
MapReduceEntriesTask<K,V,U> nextRight, |
6265 |
+ |
Fun<Map.Entry<K,V>, ? extends U> transformer, |
6266 |
+ |
BiFun<? super U, ? super U, ? extends U> reducer) { |
6267 |
+ |
super(m, p, b); this.nextRight = nextRight; |
6268 |
+ |
this.transformer = transformer; |
6269 |
+ |
this.reducer = reducer; |
6270 |
+ |
} |
6271 |
+ |
@SuppressWarnings("unchecked") public final boolean exec() { |
6272 |
+ |
final Fun<Map.Entry<K,V>, ? extends U> transformer = |
6273 |
+ |
this.transformer; |
6274 |
+ |
final BiFun<? super U, ? super U, ? extends U> reducer = |
6275 |
+ |
this.reducer; |
6276 |
+ |
if (transformer == null || reducer == null) |
6277 |
+ |
return abortOnNullFunction(); |
6278 |
+ |
try { |
6279 |
+ |
for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) { |
6280 |
+ |
do {} while (!casPending(c = pending, c+1)); |
6281 |
+ |
(rights = new MapReduceEntriesTask<K,V,U> |
6282 |
+ |
(map, this, b >>>= 1, rights, transformer, reducer)).fork(); |
6283 |
+ |
} |
6284 |
+ |
U r = null, u; |
6285 |
+ |
Object v; |
6286 |
+ |
while ((v = advance()) != null) { |
6287 |
+ |
if ((u = transformer.apply(entryFor((K)nextKey, (V)v))) != null) |
6288 |
+ |
r = (r == null) ? u : reducer.apply(r, u); |
6289 |
+ |
} |
6290 |
+ |
result = r; |
6291 |
+ |
for (MapReduceEntriesTask<K,V,U> t = this, s;;) { |
6292 |
+ |
int c; BulkTask<K,V,?> par; U tr, sr; |
6293 |
+ |
if ((c = t.pending) == 0) { |
6294 |
+ |
for (s = t.rights; s != null; s = t.rights = s.nextRight) { |
6295 |
+ |
if ((sr = s.result) != null) |
6296 |
+ |
t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr); |
6297 |
+ |
} |
6298 |
+ |
if ((par = t.parent) == null || |
6299 |
+ |
!(par instanceof MapReduceEntriesTask)) { |
6300 |
+ |
t.quietlyComplete(); |
6301 |
+ |
break; |
6302 |
+ |
} |
6303 |
+ |
t = (MapReduceEntriesTask<K,V,U>)par; |
6304 |
+ |
} |
6305 |
+ |
else if (t.casPending(c, c - 1)) |
6306 |
+ |
break; |
6307 |
+ |
} |
6308 |
+ |
} catch (Throwable ex) { |
6309 |
+ |
return tryCompleteComputation(ex); |
6310 |
+ |
} |
6311 |
+ |
MapReduceEntriesTask<K,V,U> s = rights; |
6312 |
+ |
if (s != null && !inForkJoinPool()) { |
6313 |
+ |
do { |
6314 |
+ |
if (s.tryUnfork()) |
6315 |
+ |
s.exec(); |
6316 |
+ |
} while ((s = s.nextRight) != null); |
6317 |
+ |
} |
6318 |
+ |
return false; |
6319 |
+ |
} |
6320 |
+ |
public final U getRawResult() { return result; } |
6321 |
+ |
} |
6322 |
+ |
|
6323 |
+ |
@SuppressWarnings("serial") static final class MapReduceMappingsTask<K,V,U> |
6324 |
+ |
extends BulkTask<K,V,U> { |
6325 |
+ |
final BiFun<? super K, ? super V, ? extends U> transformer; |
6326 |
+ |
final BiFun<? super U, ? super U, ? extends U> reducer; |
6327 |
+ |
U result; |
6328 |
+ |
MapReduceMappingsTask<K,V,U> rights, nextRight; |
6329 |
+ |
MapReduceMappingsTask |
6330 |
+ |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
6331 |
+ |
MapReduceMappingsTask<K,V,U> nextRight, |
6332 |
+ |
BiFun<? super K, ? super V, ? extends U> transformer, |
6333 |
+ |
BiFun<? super U, ? super U, ? extends U> reducer) { |
6334 |
+ |
super(m, p, b); this.nextRight = nextRight; |
6335 |
+ |
this.transformer = transformer; |
6336 |
+ |
this.reducer = reducer; |
6337 |
+ |
} |
6338 |
+ |
@SuppressWarnings("unchecked") public final boolean exec() { |
6339 |
+ |
final BiFun<? super K, ? super V, ? extends U> transformer = |
6340 |
+ |
this.transformer; |
6341 |
+ |
final BiFun<? super U, ? super U, ? extends U> reducer = |
6342 |
+ |
this.reducer; |
6343 |
+ |
if (transformer == null || reducer == null) |
6344 |
+ |
return abortOnNullFunction(); |
6345 |
+ |
try { |
6346 |
+ |
for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) { |
6347 |
+ |
do {} while (!casPending(c = pending, c+1)); |
6348 |
+ |
(rights = new MapReduceMappingsTask<K,V,U> |
6349 |
+ |
(map, this, b >>>= 1, rights, transformer, reducer)).fork(); |
6350 |
+ |
} |
6351 |
+ |
U r = null, u; |
6352 |
+ |
Object v; |
6353 |
+ |
while ((v = advance()) != null) { |
6354 |
+ |
if ((u = transformer.apply((K)nextKey, (V)v)) != null) |
6355 |
+ |
r = (r == null) ? u : reducer.apply(r, u); |
6356 |
+ |
} |
6357 |
+ |
result = r; |
6358 |
+ |
for (MapReduceMappingsTask<K,V,U> t = this, s;;) { |
6359 |
+ |
int c; BulkTask<K,V,?> par; U tr, sr; |
6360 |
+ |
if ((c = t.pending) == 0) { |
6361 |
+ |
for (s = t.rights; s != null; s = t.rights = s.nextRight) { |
6362 |
+ |
if ((sr = s.result) != null) |
6363 |
+ |
t.result = ((tr = t.result) == null) ? sr : reducer.apply(tr, sr); |
6364 |
+ |
} |
6365 |
+ |
if ((par = t.parent) == null || |
6366 |
+ |
!(par instanceof MapReduceMappingsTask)) { |
6367 |
+ |
t.quietlyComplete(); |
6368 |
+ |
break; |
6369 |
+ |
} |
6370 |
+ |
t = (MapReduceMappingsTask<K,V,U>)par; |
6371 |
+ |
} |
6372 |
+ |
else if (t.casPending(c, c - 1)) |
6373 |
+ |
break; |
6374 |
+ |
} |
6375 |
+ |
} catch (Throwable ex) { |
6376 |
+ |
return tryCompleteComputation(ex); |
6377 |
+ |
} |
6378 |
+ |
MapReduceMappingsTask<K,V,U> s = rights; |
6379 |
+ |
if (s != null && !inForkJoinPool()) { |
6380 |
+ |
do { |
6381 |
+ |
if (s.tryUnfork()) |
6382 |
+ |
s.exec(); |
6383 |
+ |
} while ((s = s.nextRight) != null); |
6384 |
+ |
} |
6385 |
+ |
return false; |
6386 |
+ |
} |
6387 |
+ |
public final U getRawResult() { return result; } |
6388 |
+ |
} |
6389 |
+ |
|
6390 |
+ |
@SuppressWarnings("serial") static final class MapReduceKeysToDoubleTask<K,V> |
6391 |
+ |
extends BulkTask<K,V,Double> { |
6392 |
+ |
final ObjectToDouble<? super K> transformer; |
6393 |
+ |
final DoubleByDoubleToDouble reducer; |
6394 |
+ |
final double basis; |
6395 |
+ |
double result; |
6396 |
+ |
MapReduceKeysToDoubleTask<K,V> rights, nextRight; |
6397 |
+ |
MapReduceKeysToDoubleTask |
6398 |
+ |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
6399 |
+ |
MapReduceKeysToDoubleTask<K,V> nextRight, |
6400 |
+ |
ObjectToDouble<? super K> transformer, |
6401 |
+ |
double basis, |
6402 |
+ |
DoubleByDoubleToDouble reducer) { |
6403 |
+ |
super(m, p, b); this.nextRight = nextRight; |
6404 |
+ |
this.transformer = transformer; |
6405 |
+ |
this.basis = basis; this.reducer = reducer; |
6406 |
+ |
} |
6407 |
+ |
@SuppressWarnings("unchecked") public final boolean exec() { |
6408 |
+ |
final ObjectToDouble<? super K> transformer = |
6409 |
+ |
this.transformer; |
6410 |
+ |
final DoubleByDoubleToDouble reducer = this.reducer; |
6411 |
+ |
if (transformer == null || reducer == null) |
6412 |
+ |
return abortOnNullFunction(); |
6413 |
+ |
try { |
6414 |
+ |
final double id = this.basis; |
6415 |
+ |
for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) { |
6416 |
+ |
do {} while (!casPending(c = pending, c+1)); |
6417 |
+ |
(rights = new MapReduceKeysToDoubleTask<K,V> |
6418 |
+ |
(map, this, b >>>= 1, rights, transformer, id, reducer)).fork(); |
6419 |
+ |
} |
6420 |
+ |
double r = id; |
6421 |
+ |
while (advance() != null) |
6422 |
+ |
r = reducer.apply(r, transformer.apply((K)nextKey)); |
6423 |
+ |
result = r; |
6424 |
+ |
for (MapReduceKeysToDoubleTask<K,V> t = this, s;;) { |
6425 |
+ |
int c; BulkTask<K,V,?> par; |
6426 |
+ |
if ((c = t.pending) == 0) { |
6427 |
+ |
for (s = t.rights; s != null; s = t.rights = s.nextRight) { |
6428 |
+ |
t.result = reducer.apply(t.result, s.result); |
6429 |
+ |
} |
6430 |
+ |
if ((par = t.parent) == null || |
6431 |
+ |
!(par instanceof MapReduceKeysToDoubleTask)) { |
6432 |
+ |
t.quietlyComplete(); |
6433 |
+ |
break; |
6434 |
+ |
} |
6435 |
+ |
t = (MapReduceKeysToDoubleTask<K,V>)par; |
6436 |
+ |
} |
6437 |
+ |
else if (t.casPending(c, c - 1)) |
6438 |
+ |
break; |
6439 |
+ |
} |
6440 |
+ |
} catch (Throwable ex) { |
6441 |
+ |
return tryCompleteComputation(ex); |
6442 |
+ |
} |
6443 |
+ |
MapReduceKeysToDoubleTask<K,V> s = rights; |
6444 |
+ |
if (s != null && !inForkJoinPool()) { |
6445 |
+ |
do { |
6446 |
+ |
if (s.tryUnfork()) |
6447 |
+ |
s.exec(); |
6448 |
+ |
} while ((s = s.nextRight) != null); |
6449 |
+ |
} |
6450 |
+ |
return false; |
6451 |
+ |
} |
6452 |
+ |
public final Double getRawResult() { return result; } |
6453 |
+ |
} |
6454 |
+ |
|
6455 |
+ |
@SuppressWarnings("serial") static final class MapReduceValuesToDoubleTask<K,V> |
6456 |
+ |
extends BulkTask<K,V,Double> { |
6457 |
+ |
final ObjectToDouble<? super V> transformer; |
6458 |
+ |
final DoubleByDoubleToDouble reducer; |
6459 |
+ |
final double basis; |
6460 |
+ |
double result; |
6461 |
+ |
MapReduceValuesToDoubleTask<K,V> rights, nextRight; |
6462 |
+ |
MapReduceValuesToDoubleTask |
6463 |
+ |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
6464 |
+ |
MapReduceValuesToDoubleTask<K,V> nextRight, |
6465 |
+ |
ObjectToDouble<? super V> transformer, |
6466 |
+ |
double basis, |
6467 |
+ |
DoubleByDoubleToDouble reducer) { |
6468 |
+ |
super(m, p, b); this.nextRight = nextRight; |
6469 |
+ |
this.transformer = transformer; |
6470 |
+ |
this.basis = basis; this.reducer = reducer; |
6471 |
+ |
} |
6472 |
+ |
@SuppressWarnings("unchecked") public final boolean exec() { |
6473 |
+ |
final ObjectToDouble<? super V> transformer = |
6474 |
+ |
this.transformer; |
6475 |
+ |
final DoubleByDoubleToDouble reducer = this.reducer; |
6476 |
+ |
if (transformer == null || reducer == null) |
6477 |
+ |
return abortOnNullFunction(); |
6478 |
+ |
try { |
6479 |
+ |
final double id = this.basis; |
6480 |
+ |
for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) { |
6481 |
+ |
do {} while (!casPending(c = pending, c+1)); |
6482 |
+ |
(rights = new MapReduceValuesToDoubleTask<K,V> |
6483 |
+ |
(map, this, b >>>= 1, rights, transformer, id, reducer)).fork(); |
6484 |
+ |
} |
6485 |
+ |
double r = id; |
6486 |
+ |
Object v; |
6487 |
+ |
while ((v = advance()) != null) |
6488 |
+ |
r = reducer.apply(r, transformer.apply((V)v)); |
6489 |
+ |
result = r; |
6490 |
+ |
for (MapReduceValuesToDoubleTask<K,V> t = this, s;;) { |
6491 |
+ |
int c; BulkTask<K,V,?> par; |
6492 |
+ |
if ((c = t.pending) == 0) { |
6493 |
+ |
for (s = t.rights; s != null; s = t.rights = s.nextRight) { |
6494 |
+ |
t.result = reducer.apply(t.result, s.result); |
6495 |
+ |
} |
6496 |
+ |
if ((par = t.parent) == null || |
6497 |
+ |
!(par instanceof MapReduceValuesToDoubleTask)) { |
6498 |
+ |
t.quietlyComplete(); |
6499 |
+ |
break; |
6500 |
+ |
} |
6501 |
+ |
t = (MapReduceValuesToDoubleTask<K,V>)par; |
6502 |
+ |
} |
6503 |
+ |
else if (t.casPending(c, c - 1)) |
6504 |
+ |
break; |
6505 |
+ |
} |
6506 |
+ |
} catch (Throwable ex) { |
6507 |
+ |
return tryCompleteComputation(ex); |
6508 |
+ |
} |
6509 |
+ |
MapReduceValuesToDoubleTask<K,V> s = rights; |
6510 |
+ |
if (s != null && !inForkJoinPool()) { |
6511 |
+ |
do { |
6512 |
+ |
if (s.tryUnfork()) |
6513 |
+ |
s.exec(); |
6514 |
+ |
} while ((s = s.nextRight) != null); |
6515 |
+ |
} |
6516 |
+ |
return false; |
6517 |
+ |
} |
6518 |
+ |
public final Double getRawResult() { return result; } |
6519 |
+ |
} |
6520 |
+ |
|
6521 |
+ |
@SuppressWarnings("serial") static final class MapReduceEntriesToDoubleTask<K,V> |
6522 |
+ |
extends BulkTask<K,V,Double> { |
6523 |
+ |
final ObjectToDouble<Map.Entry<K,V>> transformer; |
6524 |
+ |
final DoubleByDoubleToDouble reducer; |
6525 |
+ |
final double basis; |
6526 |
+ |
double result; |
6527 |
+ |
MapReduceEntriesToDoubleTask<K,V> rights, nextRight; |
6528 |
+ |
MapReduceEntriesToDoubleTask |
6529 |
+ |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
6530 |
+ |
MapReduceEntriesToDoubleTask<K,V> nextRight, |
6531 |
+ |
ObjectToDouble<Map.Entry<K,V>> transformer, |
6532 |
+ |
double basis, |
6533 |
+ |
DoubleByDoubleToDouble reducer) { |
6534 |
+ |
super(m, p, b); this.nextRight = nextRight; |
6535 |
+ |
this.transformer = transformer; |
6536 |
+ |
this.basis = basis; this.reducer = reducer; |
6537 |
+ |
} |
6538 |
+ |
@SuppressWarnings("unchecked") public final boolean exec() { |
6539 |
+ |
final ObjectToDouble<Map.Entry<K,V>> transformer = |
6540 |
+ |
this.transformer; |
6541 |
+ |
final DoubleByDoubleToDouble reducer = this.reducer; |
6542 |
+ |
if (transformer == null || reducer == null) |
6543 |
+ |
return abortOnNullFunction(); |
6544 |
+ |
try { |
6545 |
+ |
final double id = this.basis; |
6546 |
+ |
for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) { |
6547 |
+ |
do {} while (!casPending(c = pending, c+1)); |
6548 |
+ |
(rights = new MapReduceEntriesToDoubleTask<K,V> |
6549 |
+ |
(map, this, b >>>= 1, rights, transformer, id, reducer)).fork(); |
6550 |
+ |
} |
6551 |
+ |
double r = id; |
6552 |
+ |
Object v; |
6553 |
+ |
while ((v = advance()) != null) |
6554 |
+ |
r = reducer.apply(r, transformer.apply(entryFor((K)nextKey, (V)v))); |
6555 |
+ |
result = r; |
6556 |
+ |
for (MapReduceEntriesToDoubleTask<K,V> t = this, s;;) { |
6557 |
+ |
int c; BulkTask<K,V,?> par; |
6558 |
+ |
if ((c = t.pending) == 0) { |
6559 |
+ |
for (s = t.rights; s != null; s = t.rights = s.nextRight) { |
6560 |
+ |
t.result = reducer.apply(t.result, s.result); |
6561 |
+ |
} |
6562 |
+ |
if ((par = t.parent) == null || |
6563 |
+ |
!(par instanceof MapReduceEntriesToDoubleTask)) { |
6564 |
+ |
t.quietlyComplete(); |
6565 |
+ |
break; |
6566 |
+ |
} |
6567 |
+ |
t = (MapReduceEntriesToDoubleTask<K,V>)par; |
6568 |
+ |
} |
6569 |
+ |
else if (t.casPending(c, c - 1)) |
6570 |
+ |
break; |
6571 |
+ |
} |
6572 |
+ |
} catch (Throwable ex) { |
6573 |
+ |
return tryCompleteComputation(ex); |
6574 |
+ |
} |
6575 |
+ |
MapReduceEntriesToDoubleTask<K,V> s = rights; |
6576 |
+ |
if (s != null && !inForkJoinPool()) { |
6577 |
+ |
do { |
6578 |
+ |
if (s.tryUnfork()) |
6579 |
+ |
s.exec(); |
6580 |
+ |
} while ((s = s.nextRight) != null); |
6581 |
+ |
} |
6582 |
+ |
return false; |
6583 |
+ |
} |
6584 |
+ |
public final Double getRawResult() { return result; } |
6585 |
+ |
} |
6586 |
+ |
|
6587 |
+ |
@SuppressWarnings("serial") static final class MapReduceMappingsToDoubleTask<K,V> |
6588 |
+ |
extends BulkTask<K,V,Double> { |
6589 |
+ |
final ObjectByObjectToDouble<? super K, ? super V> transformer; |
6590 |
+ |
final DoubleByDoubleToDouble reducer; |
6591 |
+ |
final double basis; |
6592 |
+ |
double result; |
6593 |
+ |
MapReduceMappingsToDoubleTask<K,V> rights, nextRight; |
6594 |
+ |
MapReduceMappingsToDoubleTask |
6595 |
+ |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
6596 |
+ |
MapReduceMappingsToDoubleTask<K,V> nextRight, |
6597 |
+ |
ObjectByObjectToDouble<? super K, ? super V> transformer, |
6598 |
+ |
double basis, |
6599 |
+ |
DoubleByDoubleToDouble reducer) { |
6600 |
+ |
super(m, p, b); this.nextRight = nextRight; |
6601 |
+ |
this.transformer = transformer; |
6602 |
+ |
this.basis = basis; this.reducer = reducer; |
6603 |
+ |
} |
6604 |
+ |
@SuppressWarnings("unchecked") public final boolean exec() { |
6605 |
+ |
final ObjectByObjectToDouble<? super K, ? super V> transformer = |
6606 |
+ |
this.transformer; |
6607 |
+ |
final DoubleByDoubleToDouble reducer = this.reducer; |
6608 |
+ |
if (transformer == null || reducer == null) |
6609 |
+ |
return abortOnNullFunction(); |
6610 |
+ |
try { |
6611 |
+ |
final double id = this.basis; |
6612 |
+ |
for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) { |
6613 |
+ |
do {} while (!casPending(c = pending, c+1)); |
6614 |
+ |
(rights = new MapReduceMappingsToDoubleTask<K,V> |
6615 |
+ |
(map, this, b >>>= 1, rights, transformer, id, reducer)).fork(); |
6616 |
+ |
} |
6617 |
+ |
double r = id; |
6618 |
+ |
Object v; |
6619 |
+ |
while ((v = advance()) != null) |
6620 |
+ |
r = reducer.apply(r, transformer.apply((K)nextKey, (V)v)); |
6621 |
+ |
result = r; |
6622 |
+ |
for (MapReduceMappingsToDoubleTask<K,V> t = this, s;;) { |
6623 |
+ |
int c; BulkTask<K,V,?> par; |
6624 |
+ |
if ((c = t.pending) == 0) { |
6625 |
+ |
for (s = t.rights; s != null; s = t.rights = s.nextRight) { |
6626 |
+ |
t.result = reducer.apply(t.result, s.result); |
6627 |
+ |
} |
6628 |
+ |
if ((par = t.parent) == null || |
6629 |
+ |
!(par instanceof MapReduceMappingsToDoubleTask)) { |
6630 |
+ |
t.quietlyComplete(); |
6631 |
+ |
break; |
6632 |
+ |
} |
6633 |
+ |
t = (MapReduceMappingsToDoubleTask<K,V>)par; |
6634 |
+ |
} |
6635 |
+ |
else if (t.casPending(c, c - 1)) |
6636 |
+ |
break; |
6637 |
+ |
} |
6638 |
+ |
} catch (Throwable ex) { |
6639 |
+ |
return tryCompleteComputation(ex); |
6640 |
+ |
} |
6641 |
+ |
MapReduceMappingsToDoubleTask<K,V> s = rights; |
6642 |
+ |
if (s != null && !inForkJoinPool()) { |
6643 |
+ |
do { |
6644 |
+ |
if (s.tryUnfork()) |
6645 |
+ |
s.exec(); |
6646 |
+ |
} while ((s = s.nextRight) != null); |
6647 |
+ |
} |
6648 |
+ |
return false; |
6649 |
+ |
} |
6650 |
+ |
public final Double getRawResult() { return result; } |
6651 |
+ |
} |
6652 |
+ |
|
6653 |
+ |
@SuppressWarnings("serial") static final class MapReduceKeysToLongTask<K,V> |
6654 |
+ |
extends BulkTask<K,V,Long> { |
6655 |
+ |
final ObjectToLong<? super K> transformer; |
6656 |
+ |
final LongByLongToLong reducer; |
6657 |
+ |
final long basis; |
6658 |
+ |
long result; |
6659 |
+ |
MapReduceKeysToLongTask<K,V> rights, nextRight; |
6660 |
+ |
MapReduceKeysToLongTask |
6661 |
+ |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
6662 |
+ |
MapReduceKeysToLongTask<K,V> nextRight, |
6663 |
+ |
ObjectToLong<? super K> transformer, |
6664 |
+ |
long basis, |
6665 |
+ |
LongByLongToLong reducer) { |
6666 |
+ |
super(m, p, b); this.nextRight = nextRight; |
6667 |
+ |
this.transformer = transformer; |
6668 |
+ |
this.basis = basis; this.reducer = reducer; |
6669 |
+ |
} |
6670 |
+ |
@SuppressWarnings("unchecked") public final boolean exec() { |
6671 |
+ |
final ObjectToLong<? super K> transformer = |
6672 |
+ |
this.transformer; |
6673 |
+ |
final LongByLongToLong reducer = this.reducer; |
6674 |
+ |
if (transformer == null || reducer == null) |
6675 |
+ |
return abortOnNullFunction(); |
6676 |
+ |
try { |
6677 |
+ |
final long id = this.basis; |
6678 |
+ |
for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) { |
6679 |
+ |
do {} while (!casPending(c = pending, c+1)); |
6680 |
+ |
(rights = new MapReduceKeysToLongTask<K,V> |
6681 |
+ |
(map, this, b >>>= 1, rights, transformer, id, reducer)).fork(); |
6682 |
+ |
} |
6683 |
+ |
long r = id; |
6684 |
+ |
while (advance() != null) |
6685 |
+ |
r = reducer.apply(r, transformer.apply((K)nextKey)); |
6686 |
+ |
result = r; |
6687 |
+ |
for (MapReduceKeysToLongTask<K,V> t = this, s;;) { |
6688 |
+ |
int c; BulkTask<K,V,?> par; |
6689 |
+ |
if ((c = t.pending) == 0) { |
6690 |
+ |
for (s = t.rights; s != null; s = t.rights = s.nextRight) { |
6691 |
+ |
t.result = reducer.apply(t.result, s.result); |
6692 |
+ |
} |
6693 |
+ |
if ((par = t.parent) == null || |
6694 |
+ |
!(par instanceof MapReduceKeysToLongTask)) { |
6695 |
+ |
t.quietlyComplete(); |
6696 |
+ |
break; |
6697 |
+ |
} |
6698 |
+ |
t = (MapReduceKeysToLongTask<K,V>)par; |
6699 |
+ |
} |
6700 |
+ |
else if (t.casPending(c, c - 1)) |
6701 |
+ |
break; |
6702 |
+ |
} |
6703 |
+ |
} catch (Throwable ex) { |
6704 |
+ |
return tryCompleteComputation(ex); |
6705 |
+ |
} |
6706 |
+ |
MapReduceKeysToLongTask<K,V> s = rights; |
6707 |
+ |
if (s != null && !inForkJoinPool()) { |
6708 |
+ |
do { |
6709 |
+ |
if (s.tryUnfork()) |
6710 |
+ |
s.exec(); |
6711 |
+ |
} while ((s = s.nextRight) != null); |
6712 |
+ |
} |
6713 |
+ |
return false; |
6714 |
+ |
} |
6715 |
+ |
public final Long getRawResult() { return result; } |
6716 |
+ |
} |
6717 |
+ |
|
6718 |
+ |
@SuppressWarnings("serial") static final class MapReduceValuesToLongTask<K,V> |
6719 |
+ |
extends BulkTask<K,V,Long> { |
6720 |
+ |
final ObjectToLong<? super V> transformer; |
6721 |
+ |
final LongByLongToLong reducer; |
6722 |
+ |
final long basis; |
6723 |
+ |
long result; |
6724 |
+ |
MapReduceValuesToLongTask<K,V> rights, nextRight; |
6725 |
+ |
MapReduceValuesToLongTask |
6726 |
+ |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
6727 |
+ |
MapReduceValuesToLongTask<K,V> nextRight, |
6728 |
+ |
ObjectToLong<? super V> transformer, |
6729 |
+ |
long basis, |
6730 |
+ |
LongByLongToLong reducer) { |
6731 |
+ |
super(m, p, b); this.nextRight = nextRight; |
6732 |
+ |
this.transformer = transformer; |
6733 |
+ |
this.basis = basis; this.reducer = reducer; |
6734 |
+ |
} |
6735 |
+ |
@SuppressWarnings("unchecked") public final boolean exec() { |
6736 |
+ |
final ObjectToLong<? super V> transformer = |
6737 |
+ |
this.transformer; |
6738 |
+ |
final LongByLongToLong reducer = this.reducer; |
6739 |
+ |
if (transformer == null || reducer == null) |
6740 |
+ |
return abortOnNullFunction(); |
6741 |
+ |
try { |
6742 |
+ |
final long id = this.basis; |
6743 |
+ |
for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) { |
6744 |
+ |
do {} while (!casPending(c = pending, c+1)); |
6745 |
+ |
(rights = new MapReduceValuesToLongTask<K,V> |
6746 |
+ |
(map, this, b >>>= 1, rights, transformer, id, reducer)).fork(); |
6747 |
+ |
} |
6748 |
+ |
long r = id; |
6749 |
+ |
Object v; |
6750 |
+ |
while ((v = advance()) != null) |
6751 |
+ |
r = reducer.apply(r, transformer.apply((V)v)); |
6752 |
+ |
result = r; |
6753 |
+ |
for (MapReduceValuesToLongTask<K,V> t = this, s;;) { |
6754 |
+ |
int c; BulkTask<K,V,?> par; |
6755 |
+ |
if ((c = t.pending) == 0) { |
6756 |
+ |
for (s = t.rights; s != null; s = t.rights = s.nextRight) { |
6757 |
+ |
t.result = reducer.apply(t.result, s.result); |
6758 |
+ |
} |
6759 |
+ |
if ((par = t.parent) == null || |
6760 |
+ |
!(par instanceof MapReduceValuesToLongTask)) { |
6761 |
+ |
t.quietlyComplete(); |
6762 |
+ |
break; |
6763 |
+ |
} |
6764 |
+ |
t = (MapReduceValuesToLongTask<K,V>)par; |
6765 |
+ |
} |
6766 |
+ |
else if (t.casPending(c, c - 1)) |
6767 |
+ |
break; |
6768 |
+ |
} |
6769 |
+ |
} catch (Throwable ex) { |
6770 |
+ |
return tryCompleteComputation(ex); |
6771 |
+ |
} |
6772 |
+ |
MapReduceValuesToLongTask<K,V> s = rights; |
6773 |
+ |
if (s != null && !inForkJoinPool()) { |
6774 |
+ |
do { |
6775 |
+ |
if (s.tryUnfork()) |
6776 |
+ |
s.exec(); |
6777 |
+ |
} while ((s = s.nextRight) != null); |
6778 |
+ |
} |
6779 |
+ |
return false; |
6780 |
+ |
} |
6781 |
+ |
public final Long getRawResult() { return result; } |
6782 |
+ |
} |
6783 |
+ |
|
6784 |
+ |
@SuppressWarnings("serial") static final class MapReduceEntriesToLongTask<K,V> |
6785 |
+ |
extends BulkTask<K,V,Long> { |
6786 |
+ |
final ObjectToLong<Map.Entry<K,V>> transformer; |
6787 |
+ |
final LongByLongToLong reducer; |
6788 |
+ |
final long basis; |
6789 |
+ |
long result; |
6790 |
+ |
MapReduceEntriesToLongTask<K,V> rights, nextRight; |
6791 |
+ |
MapReduceEntriesToLongTask |
6792 |
+ |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
6793 |
+ |
MapReduceEntriesToLongTask<K,V> nextRight, |
6794 |
+ |
ObjectToLong<Map.Entry<K,V>> transformer, |
6795 |
+ |
long basis, |
6796 |
+ |
LongByLongToLong reducer) { |
6797 |
+ |
super(m, p, b); this.nextRight = nextRight; |
6798 |
+ |
this.transformer = transformer; |
6799 |
+ |
this.basis = basis; this.reducer = reducer; |
6800 |
+ |
} |
6801 |
+ |
@SuppressWarnings("unchecked") public final boolean exec() { |
6802 |
+ |
final ObjectToLong<Map.Entry<K,V>> transformer = |
6803 |
+ |
this.transformer; |
6804 |
+ |
final LongByLongToLong reducer = this.reducer; |
6805 |
+ |
if (transformer == null || reducer == null) |
6806 |
+ |
return abortOnNullFunction(); |
6807 |
+ |
try { |
6808 |
+ |
final long id = this.basis; |
6809 |
+ |
for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) { |
6810 |
+ |
do {} while (!casPending(c = pending, c+1)); |
6811 |
+ |
(rights = new MapReduceEntriesToLongTask<K,V> |
6812 |
+ |
(map, this, b >>>= 1, rights, transformer, id, reducer)).fork(); |
6813 |
+ |
} |
6814 |
+ |
long r = id; |
6815 |
+ |
Object v; |
6816 |
+ |
while ((v = advance()) != null) |
6817 |
+ |
r = reducer.apply(r, transformer.apply(entryFor((K)nextKey, (V)v))); |
6818 |
+ |
result = r; |
6819 |
+ |
for (MapReduceEntriesToLongTask<K,V> t = this, s;;) { |
6820 |
+ |
int c; BulkTask<K,V,?> par; |
6821 |
+ |
if ((c = t.pending) == 0) { |
6822 |
+ |
for (s = t.rights; s != null; s = t.rights = s.nextRight) { |
6823 |
+ |
t.result = reducer.apply(t.result, s.result); |
6824 |
+ |
} |
6825 |
+ |
if ((par = t.parent) == null || |
6826 |
+ |
!(par instanceof MapReduceEntriesToLongTask)) { |
6827 |
+ |
t.quietlyComplete(); |
6828 |
+ |
break; |
6829 |
+ |
} |
6830 |
+ |
t = (MapReduceEntriesToLongTask<K,V>)par; |
6831 |
+ |
} |
6832 |
+ |
else if (t.casPending(c, c - 1)) |
6833 |
+ |
break; |
6834 |
+ |
} |
6835 |
+ |
} catch (Throwable ex) { |
6836 |
+ |
return tryCompleteComputation(ex); |
6837 |
+ |
} |
6838 |
+ |
MapReduceEntriesToLongTask<K,V> s = rights; |
6839 |
+ |
if (s != null && !inForkJoinPool()) { |
6840 |
+ |
do { |
6841 |
+ |
if (s.tryUnfork()) |
6842 |
+ |
s.exec(); |
6843 |
+ |
} while ((s = s.nextRight) != null); |
6844 |
+ |
} |
6845 |
+ |
return false; |
6846 |
+ |
} |
6847 |
+ |
public final Long getRawResult() { return result; } |
6848 |
+ |
} |
6849 |
+ |
|
6850 |
+ |
@SuppressWarnings("serial") static final class MapReduceMappingsToLongTask<K,V> |
6851 |
+ |
extends BulkTask<K,V,Long> { |
6852 |
+ |
final ObjectByObjectToLong<? super K, ? super V> transformer; |
6853 |
+ |
final LongByLongToLong reducer; |
6854 |
+ |
final long basis; |
6855 |
+ |
long result; |
6856 |
+ |
MapReduceMappingsToLongTask<K,V> rights, nextRight; |
6857 |
+ |
MapReduceMappingsToLongTask |
6858 |
+ |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
6859 |
+ |
MapReduceMappingsToLongTask<K,V> nextRight, |
6860 |
+ |
ObjectByObjectToLong<? super K, ? super V> transformer, |
6861 |
+ |
long basis, |
6862 |
+ |
LongByLongToLong reducer) { |
6863 |
+ |
super(m, p, b); this.nextRight = nextRight; |
6864 |
+ |
this.transformer = transformer; |
6865 |
+ |
this.basis = basis; this.reducer = reducer; |
6866 |
+ |
} |
6867 |
+ |
@SuppressWarnings("unchecked") public final boolean exec() { |
6868 |
+ |
final ObjectByObjectToLong<? super K, ? super V> transformer = |
6869 |
+ |
this.transformer; |
6870 |
+ |
final LongByLongToLong reducer = this.reducer; |
6871 |
+ |
if (transformer == null || reducer == null) |
6872 |
+ |
return abortOnNullFunction(); |
6873 |
+ |
try { |
6874 |
+ |
final long id = this.basis; |
6875 |
+ |
for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) { |
6876 |
+ |
do {} while (!casPending(c = pending, c+1)); |
6877 |
+ |
(rights = new MapReduceMappingsToLongTask<K,V> |
6878 |
+ |
(map, this, b >>>= 1, rights, transformer, id, reducer)).fork(); |
6879 |
+ |
} |
6880 |
+ |
long r = id; |
6881 |
+ |
Object v; |
6882 |
+ |
while ((v = advance()) != null) |
6883 |
+ |
r = reducer.apply(r, transformer.apply((K)nextKey, (V)v)); |
6884 |
+ |
result = r; |
6885 |
+ |
for (MapReduceMappingsToLongTask<K,V> t = this, s;;) { |
6886 |
+ |
int c; BulkTask<K,V,?> par; |
6887 |
+ |
if ((c = t.pending) == 0) { |
6888 |
+ |
for (s = t.rights; s != null; s = t.rights = s.nextRight) { |
6889 |
+ |
t.result = reducer.apply(t.result, s.result); |
6890 |
+ |
} |
6891 |
+ |
if ((par = t.parent) == null || |
6892 |
+ |
!(par instanceof MapReduceMappingsToLongTask)) { |
6893 |
+ |
t.quietlyComplete(); |
6894 |
+ |
break; |
6895 |
+ |
} |
6896 |
+ |
t = (MapReduceMappingsToLongTask<K,V>)par; |
6897 |
+ |
} |
6898 |
+ |
else if (t.casPending(c, c - 1)) |
6899 |
+ |
break; |
6900 |
+ |
} |
6901 |
+ |
} catch (Throwable ex) { |
6902 |
+ |
return tryCompleteComputation(ex); |
6903 |
+ |
} |
6904 |
+ |
MapReduceMappingsToLongTask<K,V> s = rights; |
6905 |
+ |
if (s != null && !inForkJoinPool()) { |
6906 |
+ |
do { |
6907 |
+ |
if (s.tryUnfork()) |
6908 |
+ |
s.exec(); |
6909 |
+ |
} while ((s = s.nextRight) != null); |
6910 |
+ |
} |
6911 |
+ |
return false; |
6912 |
+ |
} |
6913 |
+ |
public final Long getRawResult() { return result; } |
6914 |
+ |
} |
6915 |
+ |
|
6916 |
+ |
@SuppressWarnings("serial") static final class MapReduceKeysToIntTask<K,V> |
6917 |
+ |
extends BulkTask<K,V,Integer> { |
6918 |
+ |
final ObjectToInt<? super K> transformer; |
6919 |
+ |
final IntByIntToInt reducer; |
6920 |
+ |
final int basis; |
6921 |
+ |
int result; |
6922 |
+ |
MapReduceKeysToIntTask<K,V> rights, nextRight; |
6923 |
+ |
MapReduceKeysToIntTask |
6924 |
+ |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
6925 |
+ |
MapReduceKeysToIntTask<K,V> nextRight, |
6926 |
+ |
ObjectToInt<? super K> transformer, |
6927 |
+ |
int basis, |
6928 |
+ |
IntByIntToInt reducer) { |
6929 |
+ |
super(m, p, b); this.nextRight = nextRight; |
6930 |
+ |
this.transformer = transformer; |
6931 |
+ |
this.basis = basis; this.reducer = reducer; |
6932 |
+ |
} |
6933 |
+ |
@SuppressWarnings("unchecked") public final boolean exec() { |
6934 |
+ |
final ObjectToInt<? super K> transformer = |
6935 |
+ |
this.transformer; |
6936 |
+ |
final IntByIntToInt reducer = this.reducer; |
6937 |
+ |
if (transformer == null || reducer == null) |
6938 |
+ |
return abortOnNullFunction(); |
6939 |
+ |
try { |
6940 |
+ |
final int id = this.basis; |
6941 |
+ |
for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) { |
6942 |
+ |
do {} while (!casPending(c = pending, c+1)); |
6943 |
+ |
(rights = new MapReduceKeysToIntTask<K,V> |
6944 |
+ |
(map, this, b >>>= 1, rights, transformer, id, reducer)).fork(); |
6945 |
+ |
} |
6946 |
+ |
int r = id; |
6947 |
+ |
while (advance() != null) |
6948 |
+ |
r = reducer.apply(r, transformer.apply((K)nextKey)); |
6949 |
+ |
result = r; |
6950 |
+ |
for (MapReduceKeysToIntTask<K,V> t = this, s;;) { |
6951 |
+ |
int c; BulkTask<K,V,?> par; |
6952 |
+ |
if ((c = t.pending) == 0) { |
6953 |
+ |
for (s = t.rights; s != null; s = t.rights = s.nextRight) { |
6954 |
+ |
t.result = reducer.apply(t.result, s.result); |
6955 |
+ |
} |
6956 |
+ |
if ((par = t.parent) == null || |
6957 |
+ |
!(par instanceof MapReduceKeysToIntTask)) { |
6958 |
+ |
t.quietlyComplete(); |
6959 |
+ |
break; |
6960 |
+ |
} |
6961 |
+ |
t = (MapReduceKeysToIntTask<K,V>)par; |
6962 |
+ |
} |
6963 |
+ |
else if (t.casPending(c, c - 1)) |
6964 |
+ |
break; |
6965 |
+ |
} |
6966 |
+ |
} catch (Throwable ex) { |
6967 |
+ |
return tryCompleteComputation(ex); |
6968 |
+ |
} |
6969 |
+ |
MapReduceKeysToIntTask<K,V> s = rights; |
6970 |
+ |
if (s != null && !inForkJoinPool()) { |
6971 |
+ |
do { |
6972 |
+ |
if (s.tryUnfork()) |
6973 |
+ |
s.exec(); |
6974 |
+ |
} while ((s = s.nextRight) != null); |
6975 |
+ |
} |
6976 |
+ |
return false; |
6977 |
+ |
} |
6978 |
+ |
public final Integer getRawResult() { return result; } |
6979 |
+ |
} |
6980 |
+ |
|
6981 |
+ |
@SuppressWarnings("serial") static final class MapReduceValuesToIntTask<K,V> |
6982 |
+ |
extends BulkTask<K,V,Integer> { |
6983 |
+ |
final ObjectToInt<? super V> transformer; |
6984 |
+ |
final IntByIntToInt reducer; |
6985 |
+ |
final int basis; |
6986 |
+ |
int result; |
6987 |
+ |
MapReduceValuesToIntTask<K,V> rights, nextRight; |
6988 |
+ |
MapReduceValuesToIntTask |
6989 |
+ |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
6990 |
+ |
MapReduceValuesToIntTask<K,V> nextRight, |
6991 |
+ |
ObjectToInt<? super V> transformer, |
6992 |
+ |
int basis, |
6993 |
+ |
IntByIntToInt reducer) { |
6994 |
+ |
super(m, p, b); this.nextRight = nextRight; |
6995 |
+ |
this.transformer = transformer; |
6996 |
+ |
this.basis = basis; this.reducer = reducer; |
6997 |
+ |
} |
6998 |
+ |
@SuppressWarnings("unchecked") public final boolean exec() { |
6999 |
+ |
final ObjectToInt<? super V> transformer = |
7000 |
+ |
this.transformer; |
7001 |
+ |
final IntByIntToInt reducer = this.reducer; |
7002 |
+ |
if (transformer == null || reducer == null) |
7003 |
+ |
return abortOnNullFunction(); |
7004 |
+ |
try { |
7005 |
+ |
final int id = this.basis; |
7006 |
+ |
for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) { |
7007 |
+ |
do {} while (!casPending(c = pending, c+1)); |
7008 |
+ |
(rights = new MapReduceValuesToIntTask<K,V> |
7009 |
+ |
(map, this, b >>>= 1, rights, transformer, id, reducer)).fork(); |
7010 |
+ |
} |
7011 |
+ |
int r = id; |
7012 |
+ |
Object v; |
7013 |
+ |
while ((v = advance()) != null) |
7014 |
+ |
r = reducer.apply(r, transformer.apply((V)v)); |
7015 |
+ |
result = r; |
7016 |
+ |
for (MapReduceValuesToIntTask<K,V> t = this, s;;) { |
7017 |
+ |
int c; BulkTask<K,V,?> par; |
7018 |
+ |
if ((c = t.pending) == 0) { |
7019 |
+ |
for (s = t.rights; s != null; s = t.rights = s.nextRight) { |
7020 |
+ |
t.result = reducer.apply(t.result, s.result); |
7021 |
+ |
} |
7022 |
+ |
if ((par = t.parent) == null || |
7023 |
+ |
!(par instanceof MapReduceValuesToIntTask)) { |
7024 |
+ |
t.quietlyComplete(); |
7025 |
+ |
break; |
7026 |
+ |
} |
7027 |
+ |
t = (MapReduceValuesToIntTask<K,V>)par; |
7028 |
+ |
} |
7029 |
+ |
else if (t.casPending(c, c - 1)) |
7030 |
+ |
break; |
7031 |
+ |
} |
7032 |
+ |
} catch (Throwable ex) { |
7033 |
+ |
return tryCompleteComputation(ex); |
7034 |
+ |
} |
7035 |
+ |
MapReduceValuesToIntTask<K,V> s = rights; |
7036 |
+ |
if (s != null && !inForkJoinPool()) { |
7037 |
+ |
do { |
7038 |
+ |
if (s.tryUnfork()) |
7039 |
+ |
s.exec(); |
7040 |
+ |
} while ((s = s.nextRight) != null); |
7041 |
+ |
} |
7042 |
+ |
return false; |
7043 |
+ |
} |
7044 |
+ |
public final Integer getRawResult() { return result; } |
7045 |
+ |
} |
7046 |
+ |
|
7047 |
+ |
@SuppressWarnings("serial") static final class MapReduceEntriesToIntTask<K,V> |
7048 |
+ |
extends BulkTask<K,V,Integer> { |
7049 |
+ |
final ObjectToInt<Map.Entry<K,V>> transformer; |
7050 |
+ |
final IntByIntToInt reducer; |
7051 |
+ |
final int basis; |
7052 |
+ |
int result; |
7053 |
+ |
MapReduceEntriesToIntTask<K,V> rights, nextRight; |
7054 |
+ |
MapReduceEntriesToIntTask |
7055 |
+ |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
7056 |
+ |
MapReduceEntriesToIntTask<K,V> nextRight, |
7057 |
+ |
ObjectToInt<Map.Entry<K,V>> transformer, |
7058 |
+ |
int basis, |
7059 |
+ |
IntByIntToInt reducer) { |
7060 |
+ |
super(m, p, b); this.nextRight = nextRight; |
7061 |
+ |
this.transformer = transformer; |
7062 |
+ |
this.basis = basis; this.reducer = reducer; |
7063 |
+ |
} |
7064 |
+ |
@SuppressWarnings("unchecked") public final boolean exec() { |
7065 |
+ |
final ObjectToInt<Map.Entry<K,V>> transformer = |
7066 |
+ |
this.transformer; |
7067 |
+ |
final IntByIntToInt reducer = this.reducer; |
7068 |
+ |
if (transformer == null || reducer == null) |
7069 |
+ |
return abortOnNullFunction(); |
7070 |
+ |
try { |
7071 |
+ |
final int id = this.basis; |
7072 |
+ |
for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) { |
7073 |
+ |
do {} while (!casPending(c = pending, c+1)); |
7074 |
+ |
(rights = new MapReduceEntriesToIntTask<K,V> |
7075 |
+ |
(map, this, b >>>= 1, rights, transformer, id, reducer)).fork(); |
7076 |
+ |
} |
7077 |
+ |
int r = id; |
7078 |
+ |
Object v; |
7079 |
+ |
while ((v = advance()) != null) |
7080 |
+ |
r = reducer.apply(r, transformer.apply(entryFor((K)nextKey, (V)v))); |
7081 |
+ |
result = r; |
7082 |
+ |
for (MapReduceEntriesToIntTask<K,V> t = this, s;;) { |
7083 |
+ |
int c; BulkTask<K,V,?> par; |
7084 |
+ |
if ((c = t.pending) == 0) { |
7085 |
+ |
for (s = t.rights; s != null; s = t.rights = s.nextRight) { |
7086 |
+ |
t.result = reducer.apply(t.result, s.result); |
7087 |
+ |
} |
7088 |
+ |
if ((par = t.parent) == null || |
7089 |
+ |
!(par instanceof MapReduceEntriesToIntTask)) { |
7090 |
+ |
t.quietlyComplete(); |
7091 |
+ |
break; |
7092 |
+ |
} |
7093 |
+ |
t = (MapReduceEntriesToIntTask<K,V>)par; |
7094 |
+ |
} |
7095 |
+ |
else if (t.casPending(c, c - 1)) |
7096 |
+ |
break; |
7097 |
+ |
} |
7098 |
+ |
} catch (Throwable ex) { |
7099 |
+ |
return tryCompleteComputation(ex); |
7100 |
+ |
} |
7101 |
+ |
MapReduceEntriesToIntTask<K,V> s = rights; |
7102 |
+ |
if (s != null && !inForkJoinPool()) { |
7103 |
+ |
do { |
7104 |
+ |
if (s.tryUnfork()) |
7105 |
+ |
s.exec(); |
7106 |
+ |
} while ((s = s.nextRight) != null); |
7107 |
+ |
} |
7108 |
+ |
return false; |
7109 |
+ |
} |
7110 |
+ |
public final Integer getRawResult() { return result; } |
7111 |
+ |
} |
7112 |
+ |
|
7113 |
+ |
@SuppressWarnings("serial") static final class MapReduceMappingsToIntTask<K,V> |
7114 |
+ |
extends BulkTask<K,V,Integer> { |
7115 |
+ |
final ObjectByObjectToInt<? super K, ? super V> transformer; |
7116 |
+ |
final IntByIntToInt reducer; |
7117 |
+ |
final int basis; |
7118 |
+ |
int result; |
7119 |
+ |
MapReduceMappingsToIntTask<K,V> rights, nextRight; |
7120 |
+ |
MapReduceMappingsToIntTask |
7121 |
+ |
(ConcurrentHashMapV8<K,V> m, BulkTask<K,V,?> p, int b, |
7122 |
+ |
MapReduceMappingsToIntTask<K,V> rights, |
7123 |
+ |
ObjectByObjectToInt<? super K, ? super V> transformer, |
7124 |
+ |
int basis, |
7125 |
+ |
IntByIntToInt reducer) { |
7126 |
+ |
super(m, p, b); this.nextRight = nextRight; |
7127 |
+ |
this.transformer = transformer; |
7128 |
+ |
this.basis = basis; this.reducer = reducer; |
7129 |
+ |
} |
7130 |
+ |
@SuppressWarnings("unchecked") public final boolean exec() { |
7131 |
+ |
final ObjectByObjectToInt<? super K, ? super V> transformer = |
7132 |
+ |
this.transformer; |
7133 |
+ |
final IntByIntToInt reducer = this.reducer; |
7134 |
+ |
if (transformer == null || reducer == null) |
7135 |
+ |
return abortOnNullFunction(); |
7136 |
+ |
try { |
7137 |
+ |
final int id = this.basis; |
7138 |
+ |
for (int c, b = batch(); b > 1 && baseIndex != baseLimit;) { |
7139 |
+ |
do {} while (!casPending(c = pending, c+1)); |
7140 |
+ |
(rights = new MapReduceMappingsToIntTask<K,V> |
7141 |
+ |
(map, this, b >>>= 1, rights, transformer, id, reducer)).fork(); |
7142 |
+ |
} |
7143 |
+ |
int r = id; |
7144 |
+ |
Object v; |
7145 |
+ |
while ((v = advance()) != null) |
7146 |
+ |
r = reducer.apply(r, transformer.apply((K)nextKey, (V)v)); |
7147 |
+ |
result = r; |
7148 |
+ |
for (MapReduceMappingsToIntTask<K,V> t = this, s;;) { |
7149 |
+ |
int c; BulkTask<K,V,?> par; |
7150 |
+ |
if ((c = t.pending) == 0) { |
7151 |
+ |
for (s = t.rights; s != null; s = t.rights = s.nextRight) { |
7152 |
+ |
t.result = reducer.apply(t.result, s.result); |
7153 |
+ |
} |
7154 |
+ |
if ((par = t.parent) == null || |
7155 |
+ |
!(par instanceof MapReduceMappingsToIntTask)) { |
7156 |
+ |
t.quietlyComplete(); |
7157 |
+ |
break; |
7158 |
+ |
} |
7159 |
+ |
t = (MapReduceMappingsToIntTask<K,V>)par; |
7160 |
+ |
} |
7161 |
+ |
else if (t.casPending(c, c - 1)) |
7162 |
+ |
break; |
7163 |
+ |
} |
7164 |
+ |
} catch (Throwable ex) { |
7165 |
+ |
return tryCompleteComputation(ex); |
7166 |
+ |
} |
7167 |
+ |
MapReduceMappingsToIntTask<K,V> s = rights; |
7168 |
+ |
if (s != null && !inForkJoinPool()) { |
7169 |
+ |
do { |
7170 |
+ |
if (s.tryUnfork()) |
7171 |
+ |
s.exec(); |
7172 |
+ |
} while ((s = s.nextRight) != null); |
7173 |
+ |
} |
7174 |
+ |
return false; |
7175 |
+ |
} |
7176 |
+ |
public final Integer getRawResult() { return result; } |
7177 |
|
} |
7178 |
|
|
7179 |
|
// Unsafe mechanics |
7230 |
|
} |
7231 |
|
} |
7232 |
|
} |
2473 |
– |
|
7233 |
|
} |