/*
* 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
* @ 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<>();
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" );}
}
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