NAME    [Toc]    [Back]

     pthread_cond_wait - wait on a condition variable

SYNOPSIS    [Toc]    [Back]

     #include <pthread.h>

     int
     pthread_cond_wait(pthread_cond_t   *cond,    pthread_mutex_t
*mutex);

DESCRIPTION    [Toc]    [Back]

     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    [Toc]    [Back]

     If successful, the pthread_cond_wait() function will  return
zero.  Otherwise
 an error number will be returned to indicate the error.

ERRORS    [Toc]    [Back]

     pthread_cond_wait() will fail if:

     [EINVAL]      The value specified by cond or the value specified by mutex
                   is invalid.

SEE ALSO    [Toc]    [Back]

     pthread_cond_broadcast(3),          pthread_cond_destroy(3),
pthread_cond_init(3),
     pthread_cond_signal(3), pthread_cond_timedwait(3)

STANDARDS    [Toc]    [Back]

     pthread_cond_wait()   conforms   to   ISO/IEC    9945-1:1996
(``POSIX'').

OpenBSD      3.6                           July      28,     1998