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/*
* This file is part of the DOM implementation for KDE.
*
* (C) 1999 Lars Knoll (knoll@kde.org)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef _DOM_RefCountImpl_h_
#define _DOM_RefCountImpl_h_
#include <tdelibs_export.h>
namespace DOM {
/*
* This implements the reference counting scheme used for all internal
* DOM objects.
*
* Other objects should overload deleteMe() to fit their needs. The default
* implementation deletes the object if the ref count drops to 0.
*/
class KHTML_EXPORT DomShared
{
public:
DomShared() : _ref( 0 ) {}
virtual ~DomShared();
/* Overload this function if you want a different deletion behavior
*/
virtual bool deleteMe();
void ref() { _ref++; }
void deref() { if(_ref) _ref--; if(!_ref && deleteMe()) delete this; }
bool hasOneRef() const { return _ref == 1; }
unsigned int refCount() const { return _ref; }
protected:
// the number of DOMObjects referencing this Node
// An implementation object will delete itself, if it has
// no DOMObject referencing it, and deleteMe() returns true.
unsigned int _ref;
};
} // namespace
#endif
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