Back to index

glibc  2.9
semaphore.h
Go to the documentation of this file.
00001 /* Machine-specific POSIX semaphore type layouts.  SPARC version.
00002    Copyright (C) 2003 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004    Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
00005 
00006    The GNU C Library is free software; you can redistribute it and/or
00007    modify it under the terms of the GNU Lesser General Public
00008    License as published by the Free Software Foundation; either
00009    version 2.1 of the License, or (at your option) any later version.
00010 
00011    The GNU C Library is distributed in the hope that it will be useful,
00012    but WITHOUT ANY WARRANTY; without even the implied warranty of
00013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014    Lesser General Public License for more details.
00015 
00016    You should have received a copy of the GNU Lesser General Public
00017    License along with the GNU C Library; if not, write to the Free
00018    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00019    02111-1307 USA.  */
00020 
00021 #ifndef _SEMAPHORE_H
00022 # error "Never use <bits/semaphore.h> directly; include <semaphore.h> instead."
00023 #endif
00024 
00025 #include <bits/wordsize.h>
00026 
00027 #if __WORDSIZE == 64
00028 # define __SIZEOF_SEM_T     32
00029 #else
00030 # define __SIZEOF_SEM_T     16
00031 #endif
00032 
00033 /* Value returned if `sem_open' failed.  */
00034 #define SEM_FAILED      ((sem_t *) 0)
00035 
00036 
00037 typedef union
00038 {
00039   char __size[__SIZEOF_SEM_T];
00040   long int __align;
00041 } sem_t;