pthread_mutex_unlock(3-thr) — Reliant UNIX 5.44c4

pthread_mutex_unlock(3-thr)                     pthread_mutex_unlock(3-thr)

NAME
     pthreadmutexunlock - unlocks a mutex

SYNOPSIS
     #include <pthread.h>

     int pthreadmutexunlock(pthreadmutext *mutex);

PARAMETERS
     mutex     Mutex that is unlocked.

DESCRIPTION
     The pthreadmutexunlock() routine unlocks a mutex. If no threads are
     waiting for the mutex, the mutex unlocks with no current owner. If one
     or more threads are waiting to lock the specified mutex, this routine
     causes one thread to return from its call to pthreadmutexlock(). The
     scheduling policy is used to determine which thread acquires the
     mutex. For the SCHEDFIFO and SCHEDRR policies, a blocked thread is
     chosen in priority order.

     The results of calling this routine are unpredictable if the mutex
     specified in mutex is unlocked. The results of calling this routine
     are also unpredictable if the mutex specified in mutex is currently
     owned by a thread other than the calling thread.

RETURN VALUES
     If the function fails, errno may be set to one of the following
     values:

     EINVAL    The value specified by mutex is invalid.

SEE ALSO
     pthreadmutexdestroy(3-thr), pthreadmutexinit(3-thr),
     pthreadmutexlock(3-thr), pthreadmutextrylock(3-thr),
     pthreadunlockglobalnp(3-thr), pthreadmutexattrsetkindnp(3-thr).




















Page 1                       Reliant UNIX 5.44                Printed 11/98
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