61 lines
2.2 KiB
Java
61 lines
2.2 KiB
Java
/*
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* Copyright 2004 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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/*
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* @test
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* @bug 4992438
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* @compile -source 1.5 Fairness.java
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* @run main Fairness
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* @summary Checks that fairness setting is respected.
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*/
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import java.util.concurrent.*;
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public class Fairness {
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private static void testFairness(boolean fair,
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final BlockingQueue<Integer> q)
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throws Exception
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{
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for (int i = 0; i < 3; i++) {
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final Integer I = new Integer(i);
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new Thread() { public void run() {
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try { q.put(I); } catch (Exception e) {}
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}}.start();
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Thread.currentThread().sleep(100);
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}
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for (int i = 0; i < 3; i++) {
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int j = q.take().intValue();
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System.err.printf("%d%n",j);
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// Non-fair queues are lifo in our implementation
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if (fair ? j != i : j != 2-i)
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throw new Exception("No fair!");
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}
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}
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public static void main(String[] args) throws Exception {
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testFairness(false, new SynchronousQueue<Integer>());
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testFairness(false, new SynchronousQueue<Integer>(false));
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testFairness(true, new SynchronousQueue<Integer>(true));
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}
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}
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