kio

dptrtemplate.h

00001 //  -*- c-basic-offset:4; indent-tabs-mode:nil -*-
00002 // vim: set ts=4 sts=4 sw=4 et:
00003 /* This file is part of the KDE project
00004    Copyright (C) 2003 Alexander Kellett <lypanov@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., 51 Franklin Street, Fifth Floor,
00019    Boston, MA 02110-1301, USA.
00020 */
00021 
00022 #ifndef __dptrtemplate_h__
00023 #define __dptrtemplate_h__
00024 
00025 #include <qptrdict.h>
00026 
00027 template<class Instance, class PrivateData>
00028 class dPtrTemplate {
00029 public:
00030     static PrivateData* d( const Instance* instance )
00031     {
00032         if ( !d_ptr ) {
00033             cleanup_d_ptr();
00034             d_ptr = new QPtrDict<PrivateData>;
00035             qAddPostRoutine( cleanup_d_ptr );
00036         }
00037         PrivateData* ret = d_ptr->find( (void*) instance );
00038         if ( ! ret ) {
00039             ret = new PrivateData;
00040             d_ptr->replace( (void*) instance, ret );
00041         }
00042         return ret;
00043     }
00044     static void delete_d( const Instance* instance )
00045     {
00046         if ( d_ptr )
00047             d_ptr->remove( (void*) instance );
00048     }
00049 private:
00050     static void cleanup_d_ptr()
00051     {
00052         delete d_ptr;
00053     }
00054     static QPtrDict<PrivateData>* d_ptr;
00055 };
00056 
00057 #endif
kio

dptrtemplate.h

kio

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