5c语言教程.doc

在做C+的项目中发现，由于用惯了c#的lock（）和java的Synchronize（），windows自带的临界区，互斥量，内核事件，信号量用起来不太习惯，于是打算自己在vc+中封装一个类似的东东。封装这个我决定采用一个临界区来做，最终的形式如下：synchronize(object)/.无论此处是否发生异常，object都能被释放掉。和c#的lock一样。不多说，开始代码。先定义一个Mutex类class Mutexpublic:Mutex(void);Mutex(void);void Lock();void UnLock();private:CRITICAL_SECTION m_criticalSection;实现如下Mutex.cpp文件#include Mutex.hMutex:Mutex(void)InitializeCriticalSection(&m_criticalSection);Mutex:Mutex(void)DeleteCriticalSection(&m_criticalSection);/保证对象被析构时候能够删除临界区void Mutex:Lock()EnterCriticalSection(&m_criticalSection);void Mutex:UnLock()LeaveCriticalSection(&m_criticalSection);在写一个Lock类来包装头文件文件/为了方便把头文件定义到了Mutex.h文件里面去了，修改Mutex.h如、/下：#define synchronized(M) for(Lock M#_lock = M; M#_lock; M#_lock.SetUnlock()/这句话后面会用到class Mutexpublic:Mutex(void);Mutex(void);void Lock();void UnLock();private:CRITICAL_SECTION m_criticalSection;class Lockpublic:Lock(Mutex &mutex);Lock(void);void SetUnlock();operator bool () const;private:Mutex &m_mutex;bool m_locked;Lock类的实现：Lock.cpp文件Code#include Mutex.hLock:Lock(Mutex &mutex): m_mutex(mutex), m_locked(true)m_mutex.Lock();Lock:Lock(void)/*一定要在析构函数中解锁，因为不管发生什么，只要对象离开他的生命周期（即离开大括号），都会调用其析构函数*/m_mutex.UnLock();void Lock:SetUnlock()m_locked = false;Lock:operator bool() constreturn m_locked;到这里算是基板上告一段落了，你可以这么用。Mutex _mutex;Lock lock(_mutex);/.在这里同步但还差一点点，我要的目标是synchronize（）.简单！注意Mutex.h文件里面的宏，没错！就他了！#define synchronized(M) for(Lock M#_lock = M; M#_lock; M#_lock.SetUnlock()大功告成！来测试下实际测试#include Mutex.hMutex mutex1;/我的互斥量into thread_count = 0;DWORD CALLBACK thread_proc(LPVOID params)for(int i = 0; i 10; +i)synchronized(mutex1)/这里同步！for(char c = A; c = Z; +c)printf(%c,c);Sleep(2);printf(n);thread_count-;return 0;int _tmain(int argc, _TCHAR* argv)thread_count = 4;CreateThread(0, 0, thread_proc, 0, 0, 0);CreateThread(0, 0, thread_proc, 0, 0, 0);CreateThread(0, 0, thread_proc, 0, 0, 0);CreateThread(0, 0, thread_proc, 0, 0, 0);while (thread_cou