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/*
* 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 arrivals in a tiered phaser
* @run main TieredArriveLoops 300
*/
import java.util.concurrent.Phaser;
public class TieredArriveLoops {
final long testDurationMillisDefault = 10L * 1000L;
final long testDurationMillis;
final long quittingTimeNanos;
TieredArriveLoops(String[] args) {
testDurationMillis = (args.length > 0) ?
Long.valueOf(args[0]) : testDurationMillisDefault;
quittingTimeNanos = System.nanoTime() +
testDurationMillis * 1000L * 1000L;
}
Runnable runner(final Phaser p) {
return new CheckedRunnable() { public void realRun() {
int prevPhase = p.register();
while (!p.isTerminated()) {
int phase = p.awaitAdvance(p.arrive());
if (phase < 0)
return;
equal(phase, (prevPhase + 1) & Integer.MAX_VALUE);
int ph = p.getPhase();
check(ph < 0 || ph == phase);
prevPhase = phase;
}
}};
}
void test(String[] args) throws Throwable {
final Phaser parent = new Phaser();
final Phaser child1 = new Phaser(parent);
final Phaser child2 = new Phaser(parent);
Thread t1 = new Thread(runner(child1));
Thread t2 = new Thread(runner(child2));
t1.start();
t2.start();
for (int prevPhase = 0, phase; ; prevPhase = phase) {
phase = child2.getPhase();
check(phase >= prevPhase);
if (System.nanoTime() - quittingTimeNanos > 0) {
System.err.printf("phase=%d%n", phase);
child1.forceTermination();
break;
}
}
t1.join();
t2.join();
}
//--------------------- 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 TieredArriveLoops(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);}
}
}
}
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