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/*
* Copyright (c) 2007, 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 nsk.monitoring.share.thread;
/**
* Locker thread is used to lock monitor on which BlockedThread's
* waits.
*/
public class LockerThread extends Thread {
private String lock = new String("a lock");
private Object ready = new Object();
private Object lockit = new Object();
private volatile boolean locked = false;
public Object getLock() {
return lock;
}
public boolean isLocked() {
return locked;
}
public void waitState() {
synchronized (ready) {
while (!locked) {
try {
ready.wait();
} catch (InterruptedException e) {
}
}
}
ThreadUtils.waitThreadState(this, Thread.State.WAITING);
System.out.println("Locker thread reached WAITING state");
}
public void finish() {
locked = false;
synchronized (lockit) {
lockit.notifyAll();
}
}
public void run() {
synchronized (lock) {
synchronized (lockit) {
synchronized (ready) {
locked = true;
ready.notifyAll();
}
while (locked) {
try {
lockit.wait();
} catch (InterruptedException e) {
}
}
}
}
System.out.println("Locker thread leaved WAITING state");
}
}
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