#include 
      
       #include 
       
        #include 
        
         std::mutex gmutex;using namespace std;template
         
          class Singleton{public:    static Type* GetSingleton()    {           if (siglen == NULL)        {            unique_lock
          
            lock(gmutex);//C++11加锁。            if (siglen == NULL)            {                siglen = new Type();                Type *temp = new Type();                MemoryBarrier();                siglen = temp;            }        }        return siglen;    }private:    static Type* siglen;};template
           
            Type* Singleton
            
             ::siglen = NULL;class Text{public: Text() { data = 100; //由于是单例模式。所以唯一会出现申请内存。调用构造 //函数。赋值三个步骤混乱的机会仅仅有在前面的1-2次 //的时候。可惜速度太快了。这样的情况发生的概率及其低 //，可是我们的心理要始终明确。
            
           
          
         
        
       
      

} void Printf() { cout << "data="<<data << endl; } static DWORD WINAPI ThreadFunc(LPVOID arg) { Singleton<Text>::GetSingleton()->Printf(); return DWORD(0); } private: int data; }; int main() { HANDLE hThread; DWORD threadId; for (int i = 0; i < 10; i++) { hThread = CreateThread(NULL, 0, &(Text::ThreadFunc), (void *)"123",0, &threadId); } Sleep(5); cout << "ThreadFunc is running!!!" << endl; return 0; } #include <iostream> using namespace std; //引用计数的智能指针。 template<typename Type> class my_auto_ptr { public: my_auto_ptr(Type* p = NULL) :ptr(p) { count = new int[1]; count[0] = 1; } my_auto_ptr(const my_auto_ptr &ma) { count = ma.count; count[0]++; } my_auto_ptr& operator=(const my_auto_ptr &ma) { if (this != &ma) { this->~my_auto_ptr(); count = ma.count; count[0]++; ptr = ma.ptr; } return *this; } ~my_auto_ptr() { if (count!=NULL &&count[0]-- == 1) { cout << "~my_auto_ptr()" << endl; delete ptr; ptr = NULL; delete[] count; count = NULL; } } Type* operator->() { return ptr; } Type& operator*() { return *ptr; } private: Type *ptr; int *count; }; int main() { my_auto_ptr<int> ps(new int(100)); my_auto_ptr<int> pb(ps); my_auto_ptr<int> pd; pd = pb; return 0; }