NAME
pthread_cond_wait —
wait on a condition variable
SYNOPSIS
#include
<pthread.h>
int
pthread_cond_wait(pthread_cond_t
*cond, pthread_mutex_t
*mutex);
DESCRIPTION
The
pthread_cond_wait()
function atomically blocks the current thread waiting on the condition
variable specified by cond, and unblocks 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
pthread_cond_wait() will fail if:
- [
EINVAL] - The value specified by cond or the value specified by mutex is invalid.
SEE ALSO
pthread_cond_broadcast(3), pthread_cond_destroy(3), pthread_cond_init(3), pthread_cond_signal(3), pthread_cond_timedwait(3)
STANDARDS
pthread_cond_wait() conforms to
ISO/IEC 9945-1:1996 (“POSIX.1”).