| /* |
| * 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/licenses/publicdomain |
| */ |
| |
| /* |
| * @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<Thread>(); |
| for (int j = 0; j < reps; ++j) { |
| threads.add(new Thread(new Runner(subchild1))); |
| threads.add(new Thread(new Runner(child1))); |
| threads.add(new Thread(new Runner(parent))); |
| threads.add(new Thread(new Runner(child2))); |
| threads.add(new Thread(new Runner(subchild2))); |
| } |
| |
| for (Thread thread : threads) |
| thread.start(); |
| |
| for (Thread thread : threads) |
| thread.join(); |
| |
| System.out.println("Parent: " + parent); |
| System.out.println("Child1: " + child1); |
| System.out.println("Child2: " + child2); |
| System.out.println("Subchild1: " + subchild1); |
| System.out.println("Subchild2: " + subchild2); |
| System.out.println("Iterations:" + count.get()); |
| |
| for (Phaser phaser : phasers) { |
| check(phaser.getPhase() > 0); |
| equal(0, phaser.getRegisteredParties()); |
| equal(0, phaser.getUnarrivedParties()); |
| equal(parent.getPhase(), phaser.getPhase()); |
| } |
| } |
| |
| //--------------------- Infrastructure --------------------------- |
| volatile int passed = 0, failed = 0; |
| void pass() {passed++;} |
| void fail() {failed++; Thread.dumpStack();} |
| void fail(String msg) {System.err.println(msg); fail();} |
| void unexpected(Throwable t) {failed++; t.printStackTrace();} |
| void check(boolean cond) {if (cond) pass(); else fail();} |
| void equal(Object x, Object y) { |
| if (x == null ? y == null : x.equals(y)) pass(); |
| else fail(x + " not equal to " + y);} |
| public static void main(String[] args) throws Throwable { |
| new FickleRegister(args).instanceMain(args);} |
| public void instanceMain(String[] args) throws Throwable { |
| try {test(args);} catch (Throwable t) {unexpected(t);} |
| System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); |
| if (failed > 0) throw new AssertionError("Some tests failed");} |
| |
| abstract class CheckedRunnable implements Runnable { |
| protected abstract void realRun() throws Throwable; |
| |
| public final void run() { |
| try {realRun();} catch (Throwable t) {unexpected(t);} |
| } |
| } |
| } |