548 |
|
* Common code for execute, invoke and submit |
549 |
|
*/ |
550 |
|
private <T> void doSubmit(ForkJoinTask<T> task) { |
551 |
+ |
if (task == null) |
552 |
+ |
throw new NullPointerException(); |
553 |
|
if (isShutdown()) |
554 |
|
throw new RejectedExecutionException(); |
555 |
|
if (workers == null) |
585 |
|
// AbstractExecutorService methods |
586 |
|
|
587 |
|
public void execute(Runnable task) { |
588 |
< |
doSubmit(new AdaptedRunnable<Void>(task, null)); |
588 |
> |
ForkJoinTask<?> job; |
589 |
> |
if (task instanceof ForkJoinTask<?>) // avoid re-wrap |
590 |
> |
job = (ForkJoinTask<?>) task; |
591 |
> |
else |
592 |
> |
job = new AdaptedRunnable<Void>(task, null); |
593 |
> |
doSubmit(job); |
594 |
|
} |
595 |
|
|
596 |
|
public <T> ForkJoinTask<T> submit(Callable<T> task) { |
606 |
|
} |
607 |
|
|
608 |
|
public ForkJoinTask<?> submit(Runnable task) { |
609 |
< |
ForkJoinTask<Void> job = new AdaptedRunnable<Void>(task, null); |
609 |
> |
ForkJoinTask<?> job; |
610 |
> |
if (task instanceof ForkJoinTask<?>) // avoid re-wrap |
611 |
> |
job = (ForkJoinTask<?>) task; |
612 |
> |
else |
613 |
> |
job = new AdaptedRunnable<Void>(task, null); |
614 |
|
doSubmit(job); |
615 |
|
return job; |
616 |
|
} |
617 |
|
|
618 |
|
/** |
619 |
+ |
* Submits a ForkJoinTask for execution. |
620 |
+ |
* |
621 |
+ |
* @param task the task to submit |
622 |
+ |
* @return the task |
623 |
+ |
* @throws RejectedExecutionException if the task cannot be |
624 |
+ |
* scheduled for execution |
625 |
+ |
* @throws NullPointerException if the task is null |
626 |
+ |
*/ |
627 |
+ |
public <T> ForkJoinTask<T> submit(ForkJoinTask<T> task) { |
628 |
+ |
doSubmit(task); |
629 |
+ |
return task; |
630 |
+ |
} |
631 |
+ |
|
632 |
+ |
/** |
633 |
|
* Adaptor for Runnables. This implements RunnableFuture |
634 |
|
* to be compliant with AbstractExecutorService constraints. |
635 |
|
*/ |
1876 |
|
return new AdaptedCallable<T>(callable); |
1877 |
|
} |
1878 |
|
|
1879 |
< |
|
1855 |
< |
// Unsafe mechanics for jsr166y 3rd party package. |
1856 |
< |
private static sun.misc.Unsafe getUnsafe() { |
1857 |
< |
try { |
1858 |
< |
return sun.misc.Unsafe.getUnsafe(); |
1859 |
< |
} catch (SecurityException se) { |
1860 |
< |
try { |
1861 |
< |
return java.security.AccessController.doPrivileged |
1862 |
< |
(new java.security.PrivilegedExceptionAction<sun.misc.Unsafe>() { |
1863 |
< |
public sun.misc.Unsafe run() throws Exception { |
1864 |
< |
return getUnsafeByReflection(); |
1865 |
< |
}}); |
1866 |
< |
} catch (java.security.PrivilegedActionException e) { |
1867 |
< |
throw new RuntimeException("Could not initialize intrinsics", |
1868 |
< |
e.getCause()); |
1869 |
< |
} |
1870 |
< |
} |
1871 |
< |
} |
1872 |
< |
|
1873 |
< |
private static sun.misc.Unsafe getUnsafeByReflection() |
1874 |
< |
throws NoSuchFieldException, IllegalAccessException { |
1875 |
< |
java.lang.reflect.Field f = |
1876 |
< |
sun.misc.Unsafe.class.getDeclaredField("theUnsafe"); |
1877 |
< |
f.setAccessible(true); |
1878 |
< |
return (sun.misc.Unsafe) f.get(null); |
1879 |
< |
} |
1880 |
< |
|
1881 |
< |
private static long fieldOffset(String fieldName, Class<?> klazz) { |
1882 |
< |
try { |
1883 |
< |
return UNSAFE.objectFieldOffset(klazz.getDeclaredField(fieldName)); |
1884 |
< |
} catch (NoSuchFieldException e) { |
1885 |
< |
// Convert Exception to Error |
1886 |
< |
NoSuchFieldError error = new NoSuchFieldError(fieldName); |
1887 |
< |
error.initCause(e); |
1888 |
< |
throw error; |
1889 |
< |
} |
1890 |
< |
} |
1879 |
> |
// Unsafe mechanics |
1880 |
|
|
1881 |
|
private static final sun.misc.Unsafe UNSAFE = getUnsafe(); |
1882 |
< |
static final long eventCountOffset = |
1883 |
< |
fieldOffset("eventCount", ForkJoinPool.class); |
1884 |
< |
static final long workerCountsOffset = |
1885 |
< |
fieldOffset("workerCounts", ForkJoinPool.class); |
1886 |
< |
static final long runControlOffset = |
1887 |
< |
fieldOffset("runControl", ForkJoinPool.class); |
1888 |
< |
static final long syncStackOffset = |
1889 |
< |
fieldOffset("syncStack",ForkJoinPool.class); |
1890 |
< |
static final long spareStackOffset = |
1891 |
< |
fieldOffset("spareStack", ForkJoinPool.class); |
1882 |
> |
private static final long eventCountOffset = |
1883 |
> |
objectFieldOffset("eventCount", ForkJoinPool.class); |
1884 |
> |
private static final long workerCountsOffset = |
1885 |
> |
objectFieldOffset("workerCounts", ForkJoinPool.class); |
1886 |
> |
private static final long runControlOffset = |
1887 |
> |
objectFieldOffset("runControl", ForkJoinPool.class); |
1888 |
> |
private static final long syncStackOffset = |
1889 |
> |
objectFieldOffset("syncStack",ForkJoinPool.class); |
1890 |
> |
private static final long spareStackOffset = |
1891 |
> |
objectFieldOffset("spareStack", ForkJoinPool.class); |
1892 |
|
|
1893 |
|
private boolean casEventCount(long cmp, long val) { |
1894 |
|
return UNSAFE.compareAndSwapLong(this, eventCountOffset, cmp, val); |
1905 |
|
private boolean casBarrierStack(WaitQueueNode cmp, WaitQueueNode val) { |
1906 |
|
return UNSAFE.compareAndSwapObject(this, syncStackOffset, cmp, val); |
1907 |
|
} |
1908 |
+ |
|
1909 |
+ |
private static long objectFieldOffset(String field, Class<?> klazz) { |
1910 |
+ |
try { |
1911 |
+ |
return UNSAFE.objectFieldOffset(klazz.getDeclaredField(field)); |
1912 |
+ |
} catch (NoSuchFieldException e) { |
1913 |
+ |
// Convert Exception to corresponding Error |
1914 |
+ |
NoSuchFieldError error = new NoSuchFieldError(field); |
1915 |
+ |
error.initCause(e); |
1916 |
+ |
throw error; |
1917 |
+ |
} |
1918 |
+ |
} |
1919 |
+ |
|
1920 |
+ |
/** |
1921 |
+ |
* Returns a sun.misc.Unsafe. Suitable for use in a 3rd party package. |
1922 |
+ |
* Replace with a simple call to Unsafe.getUnsafe when integrating |
1923 |
+ |
* into a jdk. |
1924 |
+ |
* |
1925 |
+ |
* @return a sun.misc.Unsafe |
1926 |
+ |
*/ |
1927 |
+ |
private static sun.misc.Unsafe getUnsafe() { |
1928 |
+ |
try { |
1929 |
+ |
return sun.misc.Unsafe.getUnsafe(); |
1930 |
+ |
} catch (SecurityException se) { |
1931 |
+ |
try { |
1932 |
+ |
return java.security.AccessController.doPrivileged |
1933 |
+ |
(new java.security |
1934 |
+ |
.PrivilegedExceptionAction<sun.misc.Unsafe>() { |
1935 |
+ |
public sun.misc.Unsafe run() throws Exception { |
1936 |
+ |
java.lang.reflect.Field f = sun.misc |
1937 |
+ |
.Unsafe.class.getDeclaredField("theUnsafe"); |
1938 |
+ |
f.setAccessible(true); |
1939 |
+ |
return (sun.misc.Unsafe) f.get(null); |
1940 |
+ |
}}); |
1941 |
+ |
} catch (java.security.PrivilegedActionException e) { |
1942 |
+ |
throw new RuntimeException("Could not initialize intrinsics", |
1943 |
+ |
e.getCause()); |
1944 |
+ |
} |
1945 |
+ |
} |
1946 |
+ |
} |
1947 |
|
} |