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comparison src/EDU/oswego/cs/dl/util/concurrent/ReaderPreferenceReadWriteLock.java @ 0:3dc0c5604566

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Initial checkin of blitz 2.0 fcs - no installer yet.
author Dan Creswell <dan.creswell@gmail.com>
date Sat, 21 Mar 2009 11:00:06 +0000
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1 /*
2 File: ReaderPreferenceReadWriteLock.java
3
4 Originally written by Doug Lea and released into the public domain.
5 This may be used for any purposes whatsoever without acknowledgment.
6 Thanks for the assistance and support of Sun Microsystems Labs,
7 and everyone contributing, testing, and using this code.
8
9 History:
10 Date Who What
11 11Jun1998 dl Create public version
12 */
13
14 package EDU.oswego.cs.dl.util.concurrent;
15
16 /**
17 * A ReadWriteLock that prefers waiting readers over
18 * waiting writers when there is contention. The range of applicability
19 * of this class is very limited. In the majority of situations,
20 * writer preference locks provide more reasonable semantics.
21 *
22 * <p>[<a href="http://gee.cs.oswego.edu/dl/classes/EDU/oswego/cs/dl/util/concurrent/intro.html"> Introduction to this package. </a>]
23 **/
24
25 public class ReaderPreferenceReadWriteLock extends WriterPreferenceReadWriteLock {
26 protected boolean allowReader() {
27 return activeWriter_ == null;
28 }
29 }
30