---

class CLock

{

public:

     void Lock() {EnterCriticalSection(&m_sec);}

     void Unlock() {LeaveCriticalSection(&m_sec);}

     CLock () {InitializeCriticalSection(&m_sec);}

     ~ CLock () {DeleteCriticalSection(&m_sec);}   

private:

    CRITICAL_SECTION m_sec;

};

//把加锁和放锁放在构造函数和析构函数里，锁就会随着构造函数和析构函数的调用而加锁和放锁了。

class CAutoLock

{

public:

      CAutoLock(CLock  * lpLock) :

      m_pLock (lpLock)

      {

          m_pLock ->Lock();

      }

      ~CAutoLock()

      {

          m_pLock ->Unlock();

      }

private:

    CLock * m_pLock;

};

 //自动锁的使用：

{

    CLock m_lock;

    CAutoLock(&m_lock);

    …

}