A Real Condition For A Condition Variable (Cont.)

Lets see the real code that will be used with this fictional queue. We'll ignore error handling to simplify the code. We assume that 'q' is a pointer to the Queue's data structure. In the signaling thread:


 /* lock the mutex. */
 pthread_mutex_lock(&mutex);

 /* add an element to the queue. this increases queue size. */
 add_element_to_queue(q, e);

 /* signal the cond. variable. */
 pthread_cond_signal(&cond);

 /* unlock the mutex. */
 pthread_mutex_unlock(&mutex);