单实例模式的实现

template <class T>
class ISingleton
{
public:
	static T& Instance()
	{
		static void* volatile pInstance = NULL;
		static void* volatile creating = NULL;
		if(pInstance)
			return pInstance;
		if(InterlockedCompareExchangePointer(&creating, (void*)1, 0) == 0)
		{
			static T instance;
			InterlockedExchangePointer(&pInstance, &instance);
		}else
		{
			if(!pInstance)
				Sleep(1);
		}
		return pInstance;
	}
private:
	ISingleton();
	ISingleton(const ISingleton&);
	ISingleton& operator=(const ISingleton&);
};

单实例模式的实现,布布扣,bubuko.com

单实例模式的实现

原文：http://blog.csdn.net/x313695373/article/details/24192053