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PTHREAD_COND_WAIT(3) Library Functions Manual PTHREAD_COND_WAIT(3)

NAME

pthread_cond_waitwait 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”).
June 5, 2013 OpenBSD-current