-
Notifications
You must be signed in to change notification settings - Fork 9
/
singleton.cpp
70 lines (62 loc) · 1.01 KB
/
singleton.cpp
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
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
#include<iostream>
using namespace std;
class Singleton
{
public:
static Singleton& Instance()
{
static Singleton singleton;
return singleton;
}
private:
Singleton(){};
};
template <typename T>
class Singleton
{
public:
static T& Instance()
{
static T s_Instance;
return s_Instance;
}
protected:
Singleton(void){}
~Singleton(void){}
private:
Singleton(const Singleton& rhs){}
singleton& operator = (const Singleton& rhs){}
};
template<typename T>
class Singleton
{
public:
static T& Instance(){
if(m_pInstance == NULL)
{
Lock lock;
if(m_pInstance == NULL)
{
m_pInstance = new T();
atexit(Destory);
}
return *m_pInstance;
}
return *m_pInstance;
}
protected:
Singleton(void){}
~Singleton(void){}
private:
Singleton(const Singleton& rhs){}
Singleton& operator = (const Singleton& rhs){}
void Destory()
{
if(m_pInstance != NULL)
delete m_pInstance;
m_pInstance = NULL;
}
static T* volatile m_pInstance;
};
template<typename T>
T* singleton<T>::m_pInstance = NULL;