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Java example source code file (FickleRegister.java)
The FickleRegister.java Java example source code/* * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ /* * This file is available under and governed by the GNU General Public * License version 2 only, as published by the Free Software Foundation. * However, the following notice accompanied the original version of this * file: * * Written by Doug Lea with assistance from members of JCP JSR-166 * Expert Group and released to the public domain, as explained at * http://creativecommons.org/publicdomain/zero/1.0/ */ /* * @test * @summary stress test for register/arriveAndDeregister * @run main FickleRegister 300 */ import java.util.*; import java.util.concurrent.*; import java.util.concurrent.atomic.*; public class FickleRegister { final AtomicLong count = new AtomicLong(0); final long testDurationMillisDefault = 10L * 1000L; final long testDurationMillis; final long quittingTimeNanos; final int chunkSize = 1000; FickleRegister(String[] args) { testDurationMillis = (args.length > 0) ? Long.valueOf(args[0]) : testDurationMillisDefault; quittingTimeNanos = System.nanoTime() + testDurationMillis * 1000L * 1000L; } class Runner extends CheckedRunnable { final Phaser p; Runner(Phaser phaser) { p = phaser; } public void realRun() { int prevPhase = -1; for (int k = 1;; k++) { for (int i = 0; i < chunkSize; i++) { int phase = p.register(); if (phase < 0) break; check(phase > prevPhase); prevPhase = phase; equal(phase, p.arriveAndDeregister()); check(phase < p.awaitAdvance(phase)); } if (System.nanoTime() - quittingTimeNanos > 0) { count.getAndAdd(k * chunkSize); break; } } } } void test(String[] args) throws Throwable { final Phaser parent = new Phaser() { protected boolean onAdvance(int phase, int parties) { return false; } }; final Phaser child1 = new Phaser(parent); final Phaser child2 = new Phaser(parent); final Phaser subchild1 = new Phaser(child1); final Phaser subchild2 = new Phaser(child2); final Phaser[] phasers = { parent, child1, child2, subchild1, subchild2 }; int reps = 4; ArrayList<Thread> threads = new ArrayList Other Java examples (source code examples)Here is a short list of links related to this Java FickleRegister.java source code file: |
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