This Operating Systems.

Please answer both question with your best abilities. I don't understand them and it will help me alot if you answer them correctly with good details. THANK YOU IN ADVANCE!

Thread API: condition variable+ mutex lock Consider two shared variables x and y, protected by the mutex lock mutex, and a condition variable cond that is to be signaled whenever x becomes greater than y. There are two threads: thread 1 is blocked when (xy)" after pthread_mutex_unlock in thread2, does it still work? thread 1: pthread_mutex_lock(&mutex); if (x y) pthread_cond_broadcast(&cond); // pthread cond _signal(&cond); pthread_mutex_unlock(&mutex); pthread_cond_wait(&cond, &mutex);) /* operate on x and y */ pthread_mutex_unlock(&mutex); Thread API: condition variable+ mutex lock Consider two shared variables x and y, protected by the mutex lock mutex, and a condition variable cond that is to be signaled whenever x becomes greater than y. There are two threads: thread 1 is blocked when (xy)" after pthread_mutex_unlock in thread2, does it still work? thread 1: pthread_mutex_lock(&mutex); if (x y) pthread_cond_broadcast(&cond); // pthread cond _signal(&cond); pthread_mutex_unlock(&mutex); pthread_cond_wait(&cond, &mutex);) /* operate on x and y */ pthread_mutex_unlock(&mutex)