pthread_cond_wait3
Wait on a condition variable
Usage
#include <pthread.h>
int
pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex);
Overview
The pthread_cond_wait() function atomically blocks the current thread waiting on the condition variable specified by cond, and releases the mutex specified by mutex. The waiting thread unblocks only after another thread calls pthread_cond_signal(3), or pthread_cond_broadcast(3) with the same condition variable, and the current thread reacquires the lock on mutex.
Return values
If successful, the pthread_cond_wait() function will return zero. Otherwise an error number will be returned to indicate the error.
Errors
The pthread_cond_wait() function will fail if:
- [EINVAL]
-
The value specified by cond or the value specified by mutex is invalid.
Releases
149 releases since Mac OS X 10.2; the text changed 4 times.