1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
/* Copyright (C) 2004 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#ifndef _MGPTRWRAP_H_
#define _MGPTRWRAP_H_
template <typename T>
class MGPtrWrap
{
public:
typedef int (*MGDestroyFunction)(T);
private:
T _data;
int _refcount;
MGDestroyFunction _destroy_func;
public:
MGPtrWrap(T ptr) : _data(ptr), _refcount(1), _destroy_func(0) {};
MGPtrWrap(T ptr, MGDestroyFunction destroy_func) : _data(ptr), _refcount(1), _destroy_func(destroy_func) {};
~MGPtrWrap()
{
if (_destroy_func && _data)
(*_destroy_func)(_data);
}
T ptr() { return _data; };
void unreference() { _refcount--; if (_refcount <= 0) delete this; };
void reference() { _refcount++; };
};
#endif /* _MGPTRWRAP_H_ */
|
