c++11中线程安全单例模式（ Meyers Singleton）

class Singleton {public:static Singleton& Instance() {  static Singleton theSingleton;  return theSingleton;}/* more (non-static) functions here */private:Singleton(); // ctor hiddenSingleton(Singleton const&); // copy ctor hiddenSingleton& operator=(Singleton const&); // assign op. hidden~Singleton(); // dtor hidden};