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Fixed a race condition in FastQueue

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This commit is contained in:
Trustin Lee 2008-09-28 13:52:49 +00:00
parent 5170838e79
commit 6611563c8c
1 changed files with 17 additions and 12 deletions
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29
src/main/java/org/jboss/netty/util/FastQueue.java
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@ -57,21 +57,26 @@ public class FastQueue<E> {
@SuppressWarnings("unchecked")
public E poll() {
if (drainedElements == null) {
synchronized (this) {
drainedElements = elements;
drainedElementCount = size;
elements = null;
size = 0;
for (;;) {
if (drainedElements == null) {
synchronized (this) {
drainedElements = elements;
if (elements == null) {
break;
}
drainedElementCount = size;
elements = null;
size = 0;
}
index = 0;
}
index = 0;
}
if (index < drainedElementCount) {
return (E) drainedElements[index ++];
}
if (index < drainedElementCount) {
return (E) drainedElements[index ++];
}
drainedElements = null;
drainedElements = null;
}
return null;
}
}