C++中的Singleton类的实现

#include "SingletonAutoPtr.h"

#include <iostream>

//initial static member vars here

CSingletonAutoPtr* CSingletonAutoPtr::m_instance = NULL;

auto_ptr<CSingletonAutoPtr> CSingletonAutoPtr::m_auto_ptr;

/////////////////////////////////////////

// Construction/Destruction

/////////////////////////////////////////

CSingletonAutoPtr::CSingletonAutoPtr()

{

cout << "CSingletonAutoPtr::CSingletonAutoPtr()" << endl;

//put single object into auto_ptr object

m_auto_ptr = auto_ptr<CSingletonAutoPtr>(this);

}

CSingletonAutoPtr::~CSingletonAutoPtr()

{

cout << "CSingletonAutoPtr::~CSingletonAutoPtr()" << endl;

}

CSingletonAutoPtr* CSingletonAutoPtr::GetInstance()

{

//begin lock

//....

if(m_instance == NULL)

m_instance = new CSingletonAutoPtr();

//end lock

//...

return m_instance;

}

void CSingletonAutoPtr::Test()

{

cout << "CSingletonAutoPtr::Test()" << endl;

}

CSingletonAutoPtr* pSingleton = CSingletonAutoPtr::GetInstance();

pSingleton->Test();