/* * Copyright (c) 1999, 2000, 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. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * 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 sun.awt;public class Mutex { private boolean locked; private Thread owner; public synchronized void lock() { if (locked && Thread.currentThread() == owner) { throw new IllegalMonitorStateException(); } do { if (!locked) { locked = true; owner = Thread.currentThread(); } else { try { wait(); } catch (InterruptedException e) { // try again } } } while (owner != Thread.currentThread()); } public synchronized void unlock() { if (Thread.currentThread() != owner) { throw new IllegalMonitorStateException(); } owner = null; locked = false; notify(); } protected boolean isOwned() { return (locked && Thread.currentThread() == owner); }}
/*
* Copyright (c) 1999, 2000, 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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 sun.awt;
public class Mutex {
private boolean locked;
private Thread owner;
public synchronized void lock() {
if (locked && Thread.currentThread() == owner) {
throw new IllegalMonitorStateException();
}
do {
if (!locked) {
locked = true;
owner = Thread.currentThread();
} else {
try {
wait();
} catch (InterruptedException e) {
// try again
}
}
} while (owner != Thread.currentThread());
}
public synchronized void unlock() {
if (Thread.currentThread() != owner) {
throw new IllegalMonitorStateException();
}
owner = null;
locked = false;
notify();
}
protected boolean isOwned() {
return (locked && Thread.currentThread() == owner);
}
}