学步园

使用pthread实现自动锁：

#include "pthread.h"

class Mutex
{
public:
	Mutex(void);
	virtual ~Mutex(void);

public:
	void lock();
	void unLock();
protected:
	pthread_mutex_t m_pMutex;
};


class AutoLock
{
public:
	AutoLock(Mutex &mutex);
	~AutoLock();
protected:
	Mutex& mMutex;
};

#include "Mutex.h"

Mutex::Mutex(void)
{
	pthread_mutexattr_t attr;
	pthread_mutexattr_init(&attr);
	pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE_NP);
	pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
	pthread_mutex_init(&m_pMutex, &attr);
	pthread_mutexattr_destroy(&attr);
}

Mutex::~Mutex(void)
{
	pthread_mutex_destroy(&m_pMutex);
}

void Mutex::lock()
{
	(void)pthread_mutex_lock(&m_pMutex);
}

void Mutex::unLock()
{
	(void)pthread_mutex_unlock(&m_pMutex);
}

AutoLock::AutoLock(Mutex &mutex):mMutex(mutex)
{
	mMutex.lock();
}

AutoLock::~AutoLock()
{
	mMutex.unLock();
}