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  * $Id: dom_misc.h,v 1.9.4.1 2003/05/18 12:34:37 mueller Exp $
00022  */
00023 #ifndef _DOM_RefCountImpl_h_
00024 #define _DOM_RefCountImpl_h_
00025 
00026 namespace DOM {
00027 
00028 /*
00029  * This implements the reference counting scheme used for all internal
00030  * DOM objects.
00031  *
00032  * Other objects should overload deleteMe() to fit their needs. The default
00033  * implementation deletes the object if the ref count drops to 0.
00034  */
00035 class DomShared
00036 {
00037 public:
00038   DomShared() : _ref( 0 ) {}
00039   virtual ~DomShared();
00040 
00041   /* Overload this function if you want a different deletion behaviour
00042    */
00043   virtual bool deleteMe();
00044 
00045   void ref() { _ref++; }
00046   void deref() { if(_ref) _ref--; if(!_ref && deleteMe()) delete this; }
00047   bool hasOneRef() const { return _ref == 1; }
00048   unsigned int refCount() const { return _ref; }
00049 
00050 protected:
00051     // the number of DOMObjects referencing this Node
00052     // An implementation object will delete itself, if it has
00053     // no DOMObject referencing it, and deleteMe() returns true.
00054     unsigned int _ref;
00055 };
00056 
00057 } // namespace
00058 
00059 #endif
KDE Logo
This file is part of the documentation for kdelibs Version 3.1.5.
Documentation copyright © 1996-2002 the KDE developers.
Generated on Wed Jan 28 13:33:44 2004 by doxygen 1.3.4 written by Dimitri van Heesch, © 1997-2001