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dptrtemplate.h
1 /* This file is part of the KDE project
2  Copyright (C) 2003 Alexander Kellett <lypanov@kde.org>
3 
4  This library is free software; you can redistribute it and/or
5  modify it under the terms of the GNU Library General Public
6  License as published by the Free Software Foundation; either
7  version 2 of the License, or (at your option) any later version.
8 
9  This library is distributed in the hope that it will be useful,
10  but WITHOUT ANY WARRANTY; without even the implied warranty of
11  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  Library General Public License for more details.
13 
14  You should have received a copy of the GNU Library General Public License
15  along with this library; see the file COPYING.LIB. If not, write to
16  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17  Boston, MA 02110-1301, USA.
18 */
19 
20 #ifndef __dptrtemplate_h__
21 #define __dptrtemplate_h__
22 
23 #include <tqptrdict.h>
24 
25 template<class Instance, class PrivateData>
26 class dPtrTemplate {
27 public:
28  static PrivateData* d( const Instance* instance )
29  {
30  if ( !d_ptr ) {
31  cleanup_d_ptr();
32  d_ptr = new TQPtrDict<PrivateData>;
33  tqAddPostRoutine( cleanup_d_ptr );
34  }
35  PrivateData* ret = d_ptr->find( (void*) instance );
36  if ( ! ret ) {
37  ret = new PrivateData;
38  d_ptr->replace( (void*) instance, ret );
39  }
40  return ret;
41  }
42  static void delete_d( const Instance* instance )
43  {
44  if ( d_ptr )
45  d_ptr->remove( (void*) instance );
46  }
47 private:
48  static void cleanup_d_ptr()
49  {
50  delete d_ptr;
51  }
52  static TQPtrDict<PrivateData>* d_ptr;
53 };
54 
55 #endif

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