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