pthread_unlock_global_np(3) osf1 man page | unix.com

pthread_unlock_global_np(3)				     Library Functions Manual				       pthread_unlock_global_np(3)

NAME
       pthread_unlock_global_np - Unlocks the DECthreads global mutex.

LIBRARY
       DECthreads POSIX 1003.1c Library (libpthread.so)

SYNOPSIS
       #include <pthread.h>

       int   pthread_unlock_global_np(void);

STANDARDS
       None

PARAMETERS
       None

DESCRIPTION
       This  routine  unlocks  the  DECthreads	global	mutex.	 Because  the  global  mutex  is  recursive,  the  unlock occurs when each call to
       pthread_lock_global_np(3) has been matched by a call to this routine.  For example, if you called  pthread_lock_global_np(3)  three  times,
       pthread_unlock_global_np(3) unlocks the global mutex when you call it the third time.

       If  no  threads are waiting for the DECthreads global mutex, it becomes unlocked with no current owner.	If one or more threads are waiting
       to lock the global mutex, this routine causes one thread to unblock and try to acquire the global mutex.  The scheduling policy is used	to
       determine  which  thread is awakened.  For the policies SCHED_FIFO and SCHED_RR, a blocked thread is chosen in priority order, using first-
       in/first-out (FIFO) within priorities.

RETURN VALUES
       If an error condition occurs, this routine returns an integer value indicating the type of error.  Possible return values are  as  follows:
       Successful completion.  The mutex is unlocked or owned by another thread.

ERRORS
       None

RELATED INFORMATION
       Functions: pthread_lock_global_np(3)

       Manuals: Guide to DECthreads and Programmer's Guide

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														       pthread_unlock_global_np(3)