临界区的使用

/*******************************
*把临界区封装成简单的LOCK类
*/
#pragma once
#include <windows.h>

class CLHSectionLock
{
public:
    CLHSectionLock(void)    { ::InitializeCriticalSection(&m_cs); }
    ~CLHSectionLock(void)    { ::DeleteCriticalSection(&m_cs);     }
    void Lock()        { ::EnterCriticalSection(&m_cs);        }
    void UnLock()    { ::LeaveCriticalSection(&m_cs);        }
private:
    CRITICAL_SECTION    m_cs;
};

class CLHSimpleLock
{
public:
    CLHSimpleLock(CLHSectionLock& lock):m_lock(lock)
    {
        m_lock.Lock();
    }
    ~CLHSimpleLock()
    {
        m_lock.UnLock();
    }
private:
    CLHSectionLock& m_lock;
};

使用临界区只需要简单两步：

1、首先定义全局变量 CLHSectionLock  g_lock;

2、在多线程中药保护的数据前使用CLHSimpleLock simpleLock(g_lock);