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/*
* Copyright (c) 2011, 2018, 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.
*/
package gc.gctests.ObjectMonitorCleanup;
import nsk.share.test.ExecutionController;
/**
* Helper thread class for ObjectMonitorCleanup class
*/
public class MonitorThread extends Thread {
/**
* Object used for synchronization between threads in the test.
*/
public static volatile Object otherObject;
/**
* Simple way for the test to check if the running thread completed
* it's work or not.
*/
public boolean completedOk;
/**
* Tells the worker thread if it should keep running or if
* it should terminate.
*/
public volatile boolean keepRunning;
private ExecutionController stresser;
/**
* Constructor for the thread.
*
* @param maxRunTimeMillis Maximum time in milliseconds that
* the thread should run.
*/
public MonitorThread(ExecutionController stresser) {
this.stresser = stresser;
this.otherObject = new Object(); /* avoid null on first reference */
}
/**
* Main entry point for the thread.
*/
public final void run() {
synchronized (this) {
completedOk = false;
keepRunning = true;
}
// Do we need to lock keepRunning before we check it?
while (keepRunning
&& stresser.continueExecution()) {
Object placeholder = otherObject;
synchronized (placeholder) {
placeholder.notifyAll();
}
}
synchronized (this) {
completedOk = keepRunning;
}
}
}
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