pthread 的问题

void WaitEvent()

        {

            pthread_cond_wait(&st_csCondWait,&st_csMutex);

            pthread_mutex_lock(&st_csMutex);

        }

        void ActiveEvent()

        {

            pthread_cond_signal(&st_csCondWait);

            pthread_mutex_unlock(&st_csMutex);

        }

我封装了下，有时候无法激活 多线程的时候会死锁，是不是不能这样用？
------解决方案--------------------
...当然不能这样用啊...

       void WaitEvent()

        {

            pthread_mutex_lock(&st_csMutex);

            pthread_cond_wait(&st_csCondWait,&st_csMutex);

            pthread_mutex_unlock(&st_csMutex);

        }

        void ActiveEvent()

        {

            pthread_cond_signal(&st_csCondWait);

        }

pthread_cond_wait的时候会释放锁,当这个函数返回的时候回重新加锁.