30 |
|
*/ |
31 |
|
static class Mutex implements Lock, java.io.Serializable { |
32 |
|
private static class Sync extends AbstractQueuedSynchronizer { |
33 |
< |
public int acquireExclusiveState(boolean isQueued, int acquires, Thread current) { |
33 |
> |
public int acquireExclusiveState(boolean isQueued, int acquires) { |
34 |
|
assert acquires == 1; // Does not use multiple acquires |
35 |
|
return state().compareAndSet(0, 1)? 0 : -1; |
36 |
|
} |
40 |
|
return true; |
41 |
|
} |
42 |
|
|
43 |
< |
public int acquireSharedState(boolean isQueued, int acquires, Thread current) { |
43 |
> |
public int acquireSharedState(boolean isQueued, int acquires) { |
44 |
|
throw new UnsupportedOperationException(); |
45 |
|
} |
46 |
|
|
62 |
|
|
63 |
|
private final Sync sync = new Sync(); |
64 |
|
public boolean tryLock() { |
65 |
< |
return sync.acquireExclusiveState(false, 1, null) >= 0; |
65 |
> |
return sync.acquireExclusiveState(false, 1) >= 0; |
66 |
|
} |
67 |
|
public void lock() { |
68 |
< |
if (!tryLock()) sync.acquireExclusiveUninterruptibly(1); |
68 |
> |
sync.acquireExclusiveUninterruptibly(1); |
69 |
|
} |
70 |
|
public void lockInterruptibly() throws InterruptedException { |
71 |
|
sync.acquireExclusiveInterruptibly(1); |