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*/ |
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package jsr166y; |
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import java.io.Serializable; |
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import java.util.*; |
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|
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import java.util.concurrent.*; |
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import java.util.concurrent.atomic.*; |
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import sun.misc.Unsafe; |
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import java.lang.reflect.*; |
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|
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import java.io.Serializable; |
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import java.util.Collection; |
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import java.util.Collections; |
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import java.util.List; |
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import java.util.Map; |
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import java.util.WeakHashMap; |
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|
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/** |
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* Abstract base class for tasks that run within a {@link |
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* computations (as may be determined using method {@link |
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* #inForkJoinPool}). Attempts to invoke in other contexts result |
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* in exceptions or errors, possibly including ClassCastException. |
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* |
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* @return <code>this</code>, to simplify usage. |
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*/ |
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public final void fork() { |
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public final ForkJoinTask<V> fork() { |
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((ForkJoinWorkerThread) Thread.currentThread()) |
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.pushTask(this); |
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return this; |
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} |
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|
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/** |
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* @throws RuntimeException or Error if any task did so |
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*/ |
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public static void invokeAll(Collection<? extends ForkJoinTask<?>> tasks) { |
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if (!(tasks instanceof List)) { |
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if (!(tasks instanceof List<?>)) { |
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invokeAll(tasks.toArray(new ForkJoinTask<?>[tasks.size()])); |
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return; |
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} |
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@SuppressWarnings("unchecked") |
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List<? extends ForkJoinTask<?>> ts = |
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(List<? extends ForkJoinTask<?>>) tasks; |
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Throwable ex = null; |
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*/ |
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public static ForkJoinPool getPool() { |
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Thread t = Thread.currentThread(); |
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return ((t instanceof ForkJoinWorkerThread) ? |
885 |
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((ForkJoinWorkerThread) t).pool : null); |
884 |
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return (t instanceof ForkJoinWorkerThread) ? |
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((ForkJoinWorkerThread) t).pool : null; |
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} |
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|
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/** |
1037 |
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.pollTask(); |
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} |
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|
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// adaptors |
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|
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/** |
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* Returns a new ForkJoinTask that performs the <code>run</code> |
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* method of the given Runnable as its action, and returns a null |
1045 |
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* result upon <code>join</code>. |
1046 |
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* |
1047 |
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* @param runnable the runnable action |
1048 |
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* @return the task |
1049 |
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*/ |
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public static ForkJoinTask<Void> adapt(Runnable runnable) { |
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return new ForkJoinPool.AdaptedRunnable<Void>(runnable, null); |
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} |
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|
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/** |
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* Returns a new ForkJoinTask that performs the <code>run</code> |
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* method of the given Runnable as its action, and returns the |
1057 |
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* given result upon <code>join</code>. |
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* |
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* @param runnable the runnable action |
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* @param result the result upon completion |
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* @return the task |
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*/ |
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public static <T> ForkJoinTask<T> adapt(Runnable runnable, T result) { |
1064 |
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return new ForkJoinPool.AdaptedRunnable<T>(runnable, result); |
1065 |
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} |
1066 |
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|
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/** |
1068 |
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* Returns a new ForkJoinTask that performs the <code>call</code> |
1069 |
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* method of the given Callable as its action, and returns its |
1070 |
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* result upon <code>join</code>, translating any checked |
1071 |
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* exceptions encountered into <code>RuntimeException<code>. |
1072 |
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* |
1073 |
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* @param callable the callable action |
1074 |
+ |
* @return the task |
1075 |
+ |
*/ |
1076 |
+ |
public static <T> ForkJoinTask<T> adapt(Callable<T> callable) { |
1077 |
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return new ForkJoinPool.AdaptedCallable<T>(callable); |
1078 |
+ |
} |
1079 |
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|
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// Serialization support |
1081 |
|
|
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|
private static final long serialVersionUID = -7721805057305804111L; |
1109 |
|
setDoneExceptionally((Throwable) ex); |
1110 |
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} |
1111 |
|
|
1112 |
< |
// Temporary Unsafe mechanics for preliminary release |
1113 |
< |
private static Unsafe getUnsafe() throws Throwable { |
1112 |
> |
// Unsafe mechanics for jsr166y 3rd party package. |
1113 |
> |
private static sun.misc.Unsafe getUnsafe() { |
1114 |
|
try { |
1115 |
< |
return Unsafe.getUnsafe(); |
1115 |
> |
return sun.misc.Unsafe.getUnsafe(); |
1116 |
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} catch (SecurityException se) { |
1117 |
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try { |
1118 |
|
return java.security.AccessController.doPrivileged |
1119 |
< |
(new java.security.PrivilegedExceptionAction<Unsafe>() { |
1120 |
< |
public Unsafe run() throws Exception { |
1121 |
< |
return getUnsafePrivileged(); |
1119 |
> |
(new java.security.PrivilegedExceptionAction<sun.misc.Unsafe>() { |
1120 |
> |
public sun.misc.Unsafe run() throws Exception { |
1121 |
> |
return getUnsafeByReflection(); |
1122 |
|
}}); |
1123 |
|
} catch (java.security.PrivilegedActionException e) { |
1124 |
< |
throw e.getCause(); |
1124 |
> |
throw new RuntimeException("Could not initialize intrinsics", |
1125 |
> |
e.getCause()); |
1126 |
|
} |
1127 |
|
} |
1128 |
|
} |
1129 |
|
|
1130 |
< |
private static Unsafe getUnsafePrivileged() |
1130 |
> |
private static sun.misc.Unsafe getUnsafeByReflection() |
1131 |
|
throws NoSuchFieldException, IllegalAccessException { |
1132 |
< |
Field f = Unsafe.class.getDeclaredField("theUnsafe"); |
1132 |
> |
java.lang.reflect.Field f = |
1133 |
> |
sun.misc.Unsafe.class.getDeclaredField("theUnsafe"); |
1134 |
|
f.setAccessible(true); |
1135 |
< |
return (Unsafe) f.get(null); |
1087 |
< |
} |
1088 |
< |
|
1089 |
< |
private static long fieldOffset(String fieldName) |
1090 |
< |
throws NoSuchFieldException { |
1091 |
< |
return UNSAFE.objectFieldOffset |
1092 |
< |
(ForkJoinTask.class.getDeclaredField(fieldName)); |
1135 |
> |
return (sun.misc.Unsafe) f.get(null); |
1136 |
|
} |
1137 |
|
|
1138 |
< |
static final Unsafe UNSAFE; |
1096 |
< |
static final long statusOffset; |
1097 |
< |
|
1098 |
< |
static { |
1138 |
> |
private static long fieldOffset(String fieldName, Class<?> klazz) { |
1139 |
|
try { |
1140 |
< |
UNSAFE = getUnsafe(); |
1141 |
< |
statusOffset = fieldOffset("status"); |
1142 |
< |
} catch (Throwable e) { |
1143 |
< |
throw new RuntimeException("Could not initialize intrinsics", e); |
1140 |
> |
return UNSAFE.objectFieldOffset(klazz.getDeclaredField(fieldName)); |
1141 |
> |
} catch (NoSuchFieldException e) { |
1142 |
> |
// Convert Exception to Error |
1143 |
> |
NoSuchFieldError error = new NoSuchFieldError(fieldName); |
1144 |
> |
error.initCause(e); |
1145 |
> |
throw error; |
1146 |
|
} |
1147 |
|
} |
1148 |
|
|
1149 |
+ |
private static final sun.misc.Unsafe UNSAFE = getUnsafe(); |
1150 |
+ |
static final long statusOffset = |
1151 |
+ |
fieldOffset("status", ForkJoinTask.class); |
1152 |
+ |
|
1153 |
|
} |