v1/src/common/org/apache/xmlbeans/impl/common/GlobalLock.java

/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 2003 The Apache Software Foundation.  All rights 
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer. 
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* 2. Redistributions in binary form must reproduce the above copyright
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*    distribution.
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* 3. The end-user documentation included with the redistribution,
*    if any, must include the following acknowledgment:  
*       "This product includes software developed by the
*        Apache Software Foundation (http://www.apache.org/)."
*    Alternately, this acknowledgment may appear in the software itself,
*    if and wherever such third-party acknowledgments normally appear.
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* 4. The names "Apache" and "Apache Software Foundation" must 
*    not be used to endorse or promote products derived from this
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* 5. Products derived from this software may not be called "Apache 
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* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 2000-2003 BEA Systems 
* Inc., <http://www.bea.com/>. For more information on the Apache Software
* Foundation, please see <http://www.apache.org/>.
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package org.apache.xmlbeans.impl.common;

/**
 * Whenever multiple locks must be acquired within the implementation of
 * XML Beans, this GlobalLock is acquired first, and then released when all
 * the acutally-needed locks have been acquired.  This prevents deadlocks.
 */ 
public class GlobalLock
{
    private static final Mutex GLOBAL_MUTEX = new Mutex();
    
    public static void acquire() throws InterruptedException { GLOBAL_MUTEX.acquire(); }
    public static void tryToAcquire() { GLOBAL_MUTEX.tryToAcquire(); }
    public static void release() { GLOBAL_MUTEX.release(); }
}