A thread using POSIX condition variables, a thread
A) must lock the associated mutex lock before calling pthread_cond_wait( ) and unlock it after calling pthread_cond_signal( ).
B) must lock the associated mutex lock before calling pthread_cond_wait( ), but doesn't need to unlock it after calling pthread_cond_signal( ).
C) doesn't need to lock the associated mutex lock before calling pthread_cond_wait( ), but must unlock it after calling pthread_cond_signal( ).
D) doesn't need to lock the associated mutex lock before calling pthread_cond_wait( ) and doesn't need to unlock it after calling pthread_cond_signal( ).

Question

Quizplus · Accepted Answer

The correct way to use POSIX condition variables is to always lock the associated mutex before calling pthread_cond_wait() and unlock it after calling pthread_cond_signal(). This ensures proper synchronization between threads and prevents race conditions.

A Thread Using POSIX Condition Variables, a Thread