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This commit is contained in:
Kevin Walls 2009-02-25 14:32:01 +00:00
commit 781e5085de
2 changed files with 8 additions and 4 deletions
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6
jdk/src/share/classes/java/util/concurrent/locks/AbstractQueuedLongSynchronizer.java
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@ -1222,8 +1222,10 @@ public abstract class AbstractQueuedLongSynchronizer
// The correctness of this depends on head being initialized
// before tail and on head.next being accurate if the current
// thread is first in queue.
Node h, s;
return (h = head) != tail &&
Node t = tail; // Read fields in reverse initialization order
Node h = head;
Node s;
return h != t &&
((s = h.next) == null || s.thread != Thread.currentThread());
}

6
jdk/src/share/classes/java/util/concurrent/locks/AbstractQueuedSynchronizer.java
View File

@ -1445,8 +1445,10 @@ public abstract class AbstractQueuedSynchronizer
// The correctness of this depends on head being initialized
// before tail and on head.next being accurate if the current
// thread is first in queue.
Node h, s;
return (h = head) != tail &&
Node t = tail; // Read fields in reverse initialization order
Node h = head;
Node s;
return h != t &&
((s = h.next) == null || s.thread != Thread.currentThread());
}