| 930 |
|
return p; |
| 931 |
|
} |
| 932 |
|
|
| 933 |
< |
// Unsafe mechanics for jsr166y 3rd party package. |
| 933 |
> |
// Unsafe mechanics |
| 934 |
> |
|
| 935 |
> |
private static final sun.misc.Unsafe UNSAFE = getUnsafe(); |
| 936 |
> |
private static final long stateOffset = |
| 937 |
> |
objectFieldOffset("state", Phaser.class); |
| 938 |
> |
|
| 939 |
> |
private final boolean casState(long cmp, long val) { |
| 940 |
> |
return UNSAFE.compareAndSwapLong(this, stateOffset, cmp, val); |
| 941 |
> |
} |
| 942 |
> |
|
| 943 |
> |
private static long objectFieldOffset(String field, Class<?> klazz) { |
| 944 |
> |
try { |
| 945 |
> |
return UNSAFE.objectFieldOffset(klazz.getDeclaredField(field)); |
| 946 |
> |
} catch (NoSuchFieldException e) { |
| 947 |
> |
// Convert Exception to corresponding Error |
| 948 |
> |
NoSuchFieldError error = new NoSuchFieldError(field); |
| 949 |
> |
error.initCause(e); |
| 950 |
> |
throw error; |
| 951 |
> |
} |
| 952 |
> |
} |
| 953 |
> |
|
| 954 |
> |
/** |
| 955 |
> |
* Returns a sun.misc.Unsafe. Suitable for use in a 3rd party package. |
| 956 |
> |
* Replace with a simple call to Unsafe.getUnsafe when integrating |
| 957 |
> |
* into a jdk. |
| 958 |
> |
* |
| 959 |
> |
* @return a sun.misc.Unsafe |
| 960 |
> |
*/ |
| 961 |
|
private static sun.misc.Unsafe getUnsafe() { |
| 962 |
|
try { |
| 963 |
|
return sun.misc.Unsafe.getUnsafe(); |
| 964 |
|
} catch (SecurityException se) { |
| 965 |
|
try { |
| 966 |
|
return java.security.AccessController.doPrivileged |
| 967 |
< |
(new java.security.PrivilegedExceptionAction<sun.misc.Unsafe>() { |
| 967 |
> |
(new java.security |
| 968 |
> |
.PrivilegedExceptionAction<sun.misc.Unsafe>() { |
| 969 |
|
public sun.misc.Unsafe run() throws Exception { |
| 970 |
< |
return getUnsafeByReflection(); |
| 970 |
> |
java.lang.reflect.Field f = sun.misc |
| 971 |
> |
.Unsafe.class.getDeclaredField("theUnsafe"); |
| 972 |
> |
f.setAccessible(true); |
| 973 |
> |
return (sun.misc.Unsafe) f.get(null); |
| 974 |
|
}}); |
| 975 |
|
} catch (java.security.PrivilegedActionException e) { |
| 976 |
|
throw new RuntimeException("Could not initialize intrinsics", |
| 978 |
|
} |
| 979 |
|
} |
| 980 |
|
} |
| 950 |
– |
|
| 951 |
– |
private static sun.misc.Unsafe getUnsafeByReflection() |
| 952 |
– |
throws NoSuchFieldException, IllegalAccessException { |
| 953 |
– |
java.lang.reflect.Field f = |
| 954 |
– |
sun.misc.Unsafe.class.getDeclaredField("theUnsafe"); |
| 955 |
– |
f.setAccessible(true); |
| 956 |
– |
return (sun.misc.Unsafe) f.get(null); |
| 957 |
– |
} |
| 958 |
– |
|
| 959 |
– |
private static long fieldOffset(String fieldName, Class<?> klazz) { |
| 960 |
– |
try { |
| 961 |
– |
return UNSAFE.objectFieldOffset(klazz.getDeclaredField(fieldName)); |
| 962 |
– |
} catch (NoSuchFieldException e) { |
| 963 |
– |
// Convert Exception to Error |
| 964 |
– |
NoSuchFieldError error = new NoSuchFieldError(fieldName); |
| 965 |
– |
error.initCause(e); |
| 966 |
– |
throw error; |
| 967 |
– |
} |
| 968 |
– |
} |
| 969 |
– |
|
| 970 |
– |
private static final sun.misc.Unsafe UNSAFE = getUnsafe(); |
| 971 |
– |
private static final long stateOffset = |
| 972 |
– |
fieldOffset("state", Phaser.class); |
| 973 |
– |
|
| 974 |
– |
private final boolean casState(long cmp, long val) { |
| 975 |
– |
return UNSAFE.compareAndSwapLong(this, stateOffset, cmp, val); |
| 976 |
– |
} |
| 981 |
|
} |
