/*
* 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
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*/
/*
* 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
* @bug 6445158
* @summary tests for Phaser.arrive()
*/
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Phaser;
import java.util.concurrent.ThreadLocalRandom;
import java.util.concurrent.atomic.AtomicInteger;
public class Arrive {
void test(String[] args) throws Throwable {
for (int i = 0; i < 100; ++i)
doTest(args);
}
void doTest(String[] args) throws Throwable {
final int n = ThreadLocalRandom.current().nextInt(1, 10);
final Phaser startingGate = new Phaser(n);
final Phaser phaser = new Phaser(n);
final List<Thread> threads = new ArrayList<Thread>();
final AtomicInteger count0 = new AtomicInteger(0);
final AtomicInteger count1 = new AtomicInteger(0);
final Runnable task = new Runnable() { public void run() {
equal(startingGate.getPhase(), 0);
startingGate.arriveAndAwaitAdvance();
equal(startingGate.getPhase(), 1);
int phase = phaser.arrive();
if (phase == 0)
count0.getAndIncrement();
else if (phase == 1)
count1.getAndIncrement();
else
fail();
}};
for (int i = 0; i < n; i++)
threads.add(new Thread(task));
for (Thread thread : threads)
thread.start();
for (Thread thread : threads)
thread.join();
equal(count0.get(), n);
equal(count1.get(), 0);
equal(phaser.getPhase(), 1);
}
//--------------------- 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 Arrive().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");}
}