NAME

     pthread_unlock_global_np - Unlocks a global mutex

 SYNOPSIS

     #include <pthread.h>

     void pthread_unlock_global_np();

 DESCRIPTION

 The pthread_unlock_global_np() routine unlocks the global mutex when
 each call to pthread_lock_global_np() is matched by a call to this rou-
 tine. For example, if you called pthread_lock_global_np() three times,
 pthread_unlock_global_np() unlocks the global mutex when you call it
 the third time. If no threads are waiting for the global mutex, it
 becomes unlocked with no current owner. If one or more threads are
 waiting to lock the global mutex, one thread returns from its call to
 pthread_lock_global_np(). The scheduling policy is used to determine
 which thread acquires the global mutex. For the policies SCHED_FIFO and
 SCHED_RR, a blocked thread is chosen in priority order.

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

 This routine is not portable.

 RETURN VALUES

 No value is returned.

 RELATED INFORMATION

     FUNCTIONS:  pthread_lock_global_np
                 pthread_mutexattr_setkind_np
                 pthread_mutex_lock
                 pthread_mutex_unlock