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8203327: Small cleanups in java.lang.ref

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Reviewed-by: mr
This commit is contained in:
Martin Buchholz 2018-05-29 19:15:49 -07:00
parent d2dd37cf1f
commit e85e0f5daf
1 changed files with 5 additions and 5 deletions
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10
src/java.base/share/classes/java/lang/ref/ReferenceQueue.java
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@ -43,17 +43,17 @@ public class ReferenceQueue<T> {
*/
public ReferenceQueue() { }
private static class Null<S> extends ReferenceQueue<S> {
boolean enqueue(Reference<? extends S> r) {
private static class Null extends ReferenceQueue<Object> {
boolean enqueue(Reference<?> r) {
return false;
}
}
static ReferenceQueue<Object> NULL = new Null<>();
static ReferenceQueue<Object> ENQUEUED = new Null<>();
static final ReferenceQueue<Object> NULL = new Null();
static final ReferenceQueue<Object> ENQUEUED = new Null();
private static class Lock { };
private Lock lock = new Lock();
private final Lock lock = new Lock();
private volatile Reference<? extends T> head;
private long queueLength = 0;