Mercurial > hg > blitz_stable
view src/EDU/oswego/cs/dl/util/concurrent/ReaderPreferenceReadWriteLock.java @ 18:4580bb12db30
Separate command execution from command logging.
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sun, 05 Jul 2009 16:26:25 +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; } }