/*
* Copyright (c) 1999, Oracle and/or its affiliates. All rights reserved.
* 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.
*/
/**
* @test
* @bug 4176355
* @summary Suspending a ThreadGroup that contains the current thread has
* unpredictable results.
*/
public class Suspend implements Runnable {
private static Thread first=null;
private static Thread second=null;
private static ThreadGroup group = new ThreadGroup("");
private static int count = 0;
Suspend() {
Thread thread = new Thread(group, this);
if (first == null)
first = thread;
else
second = thread;
thread.start();
}
public void run() {
while (true) {
try {
Thread.sleep(1000); // Give other thread a chance to start
if (Thread.currentThread() == first)
group.suspend();
else
count++;
} catch(InterruptedException e){
}
}
}
public static void main(String[] args) throws Exception {
for (int i=0; i<2; i++)
new Suspend();
Thread.sleep(3000);
boolean failed = (count > 1);
first.stop(); second.stop();
if (failed)
throw new RuntimeException("Failure.");
}
}