1 /* Copyright (C) 2002 Free Software Foundation, Inc.
2    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
3 
4    The GNU C Library is free software; you can redistribute it and/or
5    modify it under the terms of the GNU Lesser General Public
6    License as published by the Free Software Foundation; either
7    version 2.1 of the License, or (at your option) any later version.
8 
9    The GNU C Library is distributed in the hope that it will be useful,
10    but WITHOUT ANY WARRANTY; without even the implied warranty of
11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12    Lesser General Public License for more details.
13 
14    You should have received a copy of the GNU Lesser General Public
15    License along with the GNU C Library; if not, write to the Free
16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17    02111-1307 USA.  */
18 
19 #ifndef _SEMAPHORE_H
20 # error "Never use <bits/semaphore.h> directly; include <semaphore.h> instead."
21 #endif
22 
23 
24 #define __SIZEOF_SEM_T 16
25 
26 
27 /* Value returned if `sem_open' failed.  */
28 #define SEM_FAILED      ((sem_t *) 0)
29 
30 /* Maximum value the semaphore can have.  */
31 #define SEM_VALUE_MAX   (2147483647)
32 
33 
34 typedef union
35 {
36   char __size[__SIZEOF_SEM_T];
37   long int __align;
38 } sem_t;
39