Description

   This routine unlocks the global mutex. Because the global mutex
   is recursive, the unlock occurs when each call to tis_lock_
   global() has been matched by a call to this routine. For example,
   if your program called tis_lock_global() three times, tis_unlock_
   global() unlocks the global mutex when you call it the third
   time.

   For more information about actions taken when threads are
   present, refer to the pthread_unlock_global_np() description.