khtml Library API Documentation

dom_misc.h

00001 /*
00002  * This file is part of the DOM implementation for KDE.
00003  *
00004  * (C) 1999 Lars Knoll (knoll@kde.org)
00005  *
00006  * This library is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Library General Public
00008  * License as published by the Free Software Foundation; either
00009  * version 2 of the License, or (at your option) any later version.
00010  *
00011  * This library is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Library General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Library General Public License
00017  * along with this library; see the file COPYING.LIB.  If not, write to
00018  * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
00019  * Boston, MA 02111-1307, USA.
00020  *
00021  */
00022 #ifndef _DOM_RefCountImpl_h_
00023 #define _DOM_RefCountImpl_h_
00024 
00025 namespace DOM {
00026 
00027 /*
00028  * This implements the reference counting scheme used for all internal
00029  * DOM objects.
00030  *
00031  * Other objects should overload deleteMe() to fit their needs. The default
00032  * implementation deletes the object if the ref count drops to 0.
00033  */
00034 class DomShared
00035 {
00036 public:
00037   DomShared() : _ref( 0 ) {}
00038   virtual ~DomShared();
00039 
00040   /* Overload this function if you want a different deletion behavior
00041    */
00042   virtual bool deleteMe();
00043 
00044   void ref() { _ref++; }
00045   void deref() { if(_ref) _ref--; if(!_ref && deleteMe()) delete this; }
00046   bool hasOneRef() const { return _ref == 1; }
00047   unsigned int refCount() const { return _ref; }
00048 
00049 protected:
00050     // the number of DOMObjects referencing this Node
00051     // An implementation object will delete itself, if it has
00052     // no DOMObject referencing it, and deleteMe() returns true.
00053     unsigned int _ref;
00054 };
00055 
00056 } // namespace
00057 
00058 #endif
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This file is part of the documentation for khtml Library Version 3.3.2.
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