VMS Help DCE_THREADS, Application Routines, pthread_unlock_global_np  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  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