Mercurial > hg > blitz_condensed
view src/EDU/oswego/cs/dl/util/concurrent/ReaderPreferenceReadWriteLock.java @ 34:6f68e94c1fb8 default tip
Add CondensedStats monitoring utility, equivalent to vmstat
author | Dominic Cleal <dominic-cleal@cdo2.com> |
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date | Thu, 05 Aug 2010 11:07:25 +0100 |
parents | 3dc0c5604566 |
children |
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/* File: ReaderPreferenceReadWriteLock.java Originally written by Doug Lea and released into the public domain. This may be used for any purposes whatsoever without acknowledgment. Thanks for the assistance and support of Sun Microsystems Labs, and everyone contributing, testing, and using this code. History: Date Who What 11Jun1998 dl Create public version */ package EDU.oswego.cs.dl.util.concurrent; /** * A ReadWriteLock that prefers waiting readers over * waiting writers when there is contention. The range of applicability * of this class is very limited. In the majority of situations, * writer preference locks provide more reasonable semantics. * * <p>[<a href="http://gee.cs.oswego.edu/dl/classes/EDU/oswego/cs/dl/util/concurrent/intro.html"> Introduction to this package. </a>] **/ public class ReaderPreferenceReadWriteLock extends WriterPreferenceReadWriteLock { protected boolean allowReader() { return activeWriter_ == null; } }