条件变量[closed]
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缮淳彼誊
/* in thread 1 */ pthread_mutex_lock(mx); /* protecting state access */ while (state != GOOD) { pthread_mutex_unlock(mx); wait_for_event(); pthread_mutex_lock(mx); } pthread_mutex_unlock(mx); /* in thread 2 */ pthread_mutex_lock(mx); /* protecting state access */ state = GOOD; pthread_mutex_unlock(mx); signal_event(); /* expecting to wake thread 1 up *//* in thread 1 */ pthread_mutex_lock(mx); /* protecting state access */ while (state != GOOD) { pthread_cond_wait(cond, mx); /* unlocks the mutex and sleeps, then locks it back */ } pthread_mutex_unlock(mx); /* in thread 2 */ pthread_mutex_lock(mx); /* protecting state access */ state = GOOD; pthread_cond_signal(cond); /* expecting to wake thread 1 up */ pthread_mutex_unlock(mx);