OpenConcerto

Dépôt officiel du code source de l'ERP OpenConcerto
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svn://code.openconcerto.org/openconcerto

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180 ilm 1 
/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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 *
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 * Copyright 2011 OpenConcerto, by ILM Informatique. All rights reserved.
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 *
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 * The contents of this file are subject to the terms of the GNU General Public License Version 3
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 * only ("GPL"). You may not use this file except in compliance with the License. You can obtain a
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 * copy of the License at http://www.gnu.org/licenses/gpl-3.0.html See the License for the specific
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 * language governing permissions and limitations under the License.
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 *
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 * When distributing the software, include this License Header Notice in each file.
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 */
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 package org.openconcerto.utils;
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public class ConcurrentUtils {
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    public static final boolean runLocked(final Object first, final Object second, final Runnable run) {
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        if (second == first)
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            return false;
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        final int thisHash = System.identityHashCode(first);
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        final int oHash = System.identityHashCode(second);
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        final Object o1, o2;
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        if (thisHash < oHash) {
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            o1 = first;
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            o2 = second;
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        } else if (thisHash > oHash) {
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            o1 = second;
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            o2 = first;
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        } else {
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            throw new IllegalStateException("Hash equal");
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        }
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        synchronized (o1) {
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            synchronized (o2) {
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                run.run();
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            }
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        }
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        return true;
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    }
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}