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RefCountedImpl.hpp

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00001 #ifndef RefCountedImpl_HEADER_GUARD_
00002 #define RefCountedImpl_HEADER_GUARD_
00003 /*
00004  * The Apache Software License, Version 1.1
00005  *
00006  * Copyright (c) 1999-2000 The Apache Software Foundation.  All rights
00007  * reserved.
00008  *
00009  * Redistribution and use in source and binary forms, with or without
00010  * modification, are permitted provided that the following conditions
00011  * are met:
00012  *
00013  * 1. Redistributions of source code must retain the above copyright
00014  *    notice, this list of conditions and the following disclaimer.
00015  *
00016  * 2. Redistributions in binary form must reproduce the above copyright
00017  *    notice, this list of conditions and the following disclaimer in
00018  *    the documentation and/or other materials provided with the
00019  *    distribution.
00020  *
00021  * 3. The end-user documentation included with the redistribution,
00022  *    if any, must include the following acknowledgment:
00023  *       "This product includes software developed by the
00024  *        Apache Software Foundation (http://www.apache.org/)."
00025  *    Alternately, this acknowledgment may appear in the software itself,
00026  *    if and wherever such third-party acknowledgments normally appear.
00027  *
00028  * 4. The names "Xerces" and "Apache Software Foundation" must
00029  *    not be used to endorse or promote products derived from this
00030  *    software without prior written permission. For written
00031  *    permission, please contact apache\@apache.org.
00032  *
00033  * 5. Products derived from this software may not be called "Apache",
00034  *    nor may "Apache" appear in their name, without prior written
00035  *    permission of the Apache Software Foundation.
00036  *
00037  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
00038  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00039  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
00040  * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
00041  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00042  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
00043  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
00044  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
00045  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00046  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
00047  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00048  * SUCH DAMAGE.
00049  * ====================================================================
00050  *
00051  * This software consists of voluntary contributions made by many
00052  * individuals on behalf of the Apache Software Foundation, and was
00053  * originally based on software copyright (c) 1999, International
00054  * Business Machines, Inc., http://www.ibm.com .  For more information
00055  * on the Apache Software Foundation, please see
00056  * <http://www.apache.org/>.
00057  */
00058 
00059 /*
00060  * $Log: RefCountedImpl.hpp,v $
00061  * Revision 1.4  2000/03/02 19:54:04  roddey
00062  * This checkin includes many changes done while waiting for the
00063  * 1.1.0 code to be finished. I can't list them all here, but a list is
00064  * available elsewhere.
00065  *
00066  * Revision 1.3  2000/02/24 20:11:31  abagchi
00067  * Swat for removing Log from API docs
00068  *
00069  * Revision 1.2  2000/02/06 07:47:34  rahulj
00070  * Year 2K copyright swat.
00071  *
00072  * Revision 1.1.1.1  1999/11/09 01:09:19  twl
00073  * Initial checkin
00074  *
00075  * Revision 1.3  1999/11/08 20:44:33  rahul
00076  * Swat for adding in Product name and CVS comment log variable.
00077  *
00078  */
00079 
00080 //
00081 //  This file is part of the internal implementation of the C++ XML DOM.
00082 //  It should NOT be included or used directly by application programs.
00083 //
00084 //  Applications should include the file <dom/DOM.hpp> for the entire
00085 //  DOM API, or DOM_*.hpp for individual DOM classes, where the class
00086 //  name is substituded for the *.
00087 //
00088 
00089 
00090 
00091 #include <util/XercesDefs.hpp>
00092 
00093 
00094 class  RefCountedImpl
00095 {
00096 public:
00097     int             nodeRefCount;
00098 
00099                     RefCountedImpl();
00100     virtual         ~RefCountedImpl();
00101 
00102     static void     addRef(RefCountedImpl *thisNode);
00103     static void     removeRef(RefCountedImpl *thisNode);
00104 
00105     virtual void    referenced();   // This function will be called by
00106                                     //  the reference counting implementation
00107                                     //  whenever the reference count transitions
00108                                     //  from 0 to 1.
00109 
00110     virtual void    unreferenced(); // unreferenced() is called whenever the
00111                                     //  the ref count goes from 1 to 0.  (Nodes are
00112                                     //  not deleted when the ref count goes to zero
00113                                     //  if they are in the doc tree and the tree
00114                                     //  is still referenced, so a nodes referenced /
00115                                     //  unreferenced state may switch many times
00116                                     //  over its life time.)
00117 };
00118 
00119 #endif


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