1 /* Copyright (C) 2002-2016 Free Software Foundation, Inc.
2 
3    This file is part of the GNU C Library.
4 
5    The GNU C Library is free software; you can redistribute it and/or
6    modify it under the terms of the GNU Lesser General Public
7    License as published by the Free Software Foundation; either
8    version 2.1 of the License, or (at your option) any later version.
9 
10    The GNU C Library is distributed in the hope that it will be useful,
11    but WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13    Lesser General Public License for more details.
14 
15    You should have received a copy of the GNU Lesser General Public
16    License along with the GNU C Library; if not, see
17    <http://www.gnu.org/licenses/>.  */
18 
19 #ifndef _SEMAPHORE_H
20 # error "Never use <bits/semaphore.h> directly; include <semaphore.h> instead."
21 #endif
22 
23 #define __SIZEOF_SEM_T	16
24 
25 /* Value returned if `sem_open' failed.  */
26 #define SEM_FAILED	((sem_t *) 0)
27 
28 typedef union
29 {
30   char __size[__SIZEOF_SEM_T];
31   long int __align;
32 } sem_t;
33