Muduo库

2022/8/31 6:24:32

编程Tag： lock pthread mutex unlock Muduo holder MutexLock

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MutexLock

#include <boost/noncopyable.hpp> #include <thread> #include <assert.h> class MutexLock : boost::noncopyable { public: MutexLock():holder_(0){ pthread_mutex_init(&mutex_,NULL); } ~MutexLock(){ pthread_mutex_destroy(&mutex_); } bool isLockByThisThread(){ return holder_ == pthread_self(); //原本是holder_ == CurrentThread::tid(); } void assertLocked(){ assert(isLockByThisThread()); } void lock(){ pthread_mutex_lock(&mutex_); holder_ = pthread_self(); //如果两行反了，当前线程还没拿上锁呢，isLockByThisThread就会返回错误的结果了 //原本是holder_ = CurrentThread::tid(); } void unlock(){ holder_ = 0; pthread_mutex_unlock(&mutex_); //同上 } pthread_mutex_t* getPhreadMutex(){ return &mutex_; } private: pthread_mutex_t mutex_; pid_t holder_; }; class MutexLockGuard : boost::noncopyable { public: explicit MutexLockGuard(MutexLock& mutex):mutex_(mutex){ mutex.lock(); } ~MutexLockGuard(){ mutex_.unlock(); } private: MutexLock mutex_; };

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