Dépôt officiel du code source de l'ERP OpenConcerto

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 2011 OpenConcerto, by ILM Informatique. All rights reserved.
 * 
 * The contents of this file are subject to the terms of the GNU General Public License Version 3
 * only ("GPL"). You may not use this file except in compliance with the License. You can obtain a
 * copy of the License at http://www.gnu.org/licenses/gpl-3.0.html See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each file.
 */
 
 package org.openconcerto.utils;

public class ConcurrentUtils {
    public static final boolean runLocked(final Object first, final Object second, final Runnable run) {
        if (second == first)
            return false;
        final int thisHash = System.identityHashCode(first);
        final int oHash = System.identityHashCode(second);
        final Object o1, o2;
        if (thisHash < oHash) {
            o1 = first;
            o2 = second;
        } else if (thisHash > oHash) {
            o1 = second;
            o2 = first;
        } else {
            throw new IllegalStateException("Hash equal");
        }
        synchronized (o1) {
            synchronized (o2) {
                run.run();
            }
        }
        return true;
    }
}