mirror of
https://github.com/coderkei/akmenu-next.git
synced 2025-06-19 09:25:33 -04:00
60 lines
1.6 KiB
C++
60 lines
1.6 KiB
C++
/*
|
|
singleton.h
|
|
Copyright (C) 2007 Acekard, www.acekard.com
|
|
Copyright (C) 2007-2009 somebody
|
|
Copyright (C) 2009 yellow wood goblin
|
|
|
|
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 3 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, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef _SINGLETON_H_
|
|
#define _SINGLETON_H_
|
|
#include <cstdlib>
|
|
|
|
template <class T>
|
|
class t_singleton {
|
|
public:
|
|
static T& instance() {
|
|
if (NULL == _instance) {
|
|
create_instance();
|
|
// atexit( release_instance );
|
|
// t_singleton 他自己是不会有实例的，无法利用析构函数来释放内存
|
|
// 所以利用 atexit 来在整个程序退出时释放内存
|
|
}
|
|
return *_instance;
|
|
}
|
|
|
|
private:
|
|
static void create_instance() {
|
|
if (NULL == _instance) {
|
|
_instance = new T();
|
|
}
|
|
}
|
|
|
|
static void release_instance() {
|
|
if (NULL != _instance) {
|
|
delete _instance;
|
|
_instance = NULL;
|
|
}
|
|
}
|
|
|
|
private:
|
|
static T* _instance;
|
|
};
|
|
|
|
template <class T>
|
|
T* t_singleton<T>::_instance = NULL;
|
|
|
|
#endif //_AGL_SINGLETON_H_
|