apt  0.9.7.3
weakptr.h
1 /* weakptr.h - An object which supports weak pointers.
2  *
3  * Copyright (C) 2010 Julian Andres Klode <jak@debian.org>
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 2 of the License, or
8  * (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
18  * MA 02110-1301, USA.
19  */
20 
21 #ifndef WEAK_POINTER_H
22 #define WEAK_POINTER_H
23 
24 #include <set>
25 #include <stddef.h>
26 
35 private:
36  std::set<WeakPointable**> pointers;
37 
38 public:
39 
43  inline void AddWeakPointer(WeakPointable** weakptr) {
44  pointers.insert(weakptr);
45  }
46 
50  inline void RemoveWeakPointer(WeakPointable **weakptr) {
51  pointers.erase(weakptr);
52  }
53 
58  std::set<WeakPointable**>::iterator iter = pointers.begin();
59  while (iter != pointers.end())
60  **(iter++) = NULL;
61  }
62 };
63 
64 #endif // WEAK_POINTER_H