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annotate src/EDU/oswego/cs/dl/util/concurrent/ReaderPreferenceReadWriteLock.java @ 27:511648fa4d64 Version 2.1

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Version to 2.1
author Dan Creswell <dan.creswell@gmail.com>
date Mon, 04 Jan 2010 13:00:40 +0000
parents 3dc0c5604566
children
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3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
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1 /*
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2 File: ReaderPreferenceReadWriteLock.java
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4 Originally written by Doug Lea and released into the public domain.
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5 This may be used for any purposes whatsoever without acknowledgment.
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6 Thanks for the assistance and support of Sun Microsystems Labs,
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7 and everyone contributing, testing, and using this code.
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8
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9 History:
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10 Date Who What
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11 11Jun1998 dl Create public version
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12 */
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14 package EDU.oswego.cs.dl.util.concurrent;
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16 /**
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17 * A ReadWriteLock that prefers waiting readers over
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18 * waiting writers when there is contention. The range of applicability
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19 * of this class is very limited. In the majority of situations,
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20 * writer preference locks provide more reasonable semantics.
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21 *
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22 * <p>[<a href="http://gee.cs.oswego.edu/dl/classes/EDU/oswego/cs/dl/util/concurrent/intro.html"> Introduction to this package. </a>]
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23 **/
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25 public class ReaderPreferenceReadWriteLock extends WriterPreferenceReadWriteLock {
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26 protected boolean allowReader() {
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27 return activeWriter_ == null;
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28 }
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29 }
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