1 /* Copyright (C) 2002, 2004 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 Contributed by Ulrich Drepper <drepper (at) redhat.com>, 2002. 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, write to the Free 17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 18 02111-1307 USA. */ 19 20 #ifndef _SEMAPHORE_H 21 # error "Never use <bits/semaphore.h> directly; include <semaphore.h> instead." 22 #endif 23 24 #include <bits/wordsize.h> 25 26 #if __WORDSIZE == 64 27 # define __SIZEOF_SEM_T 32 28 #else 29 # define __SIZEOF_SEM_T 16 30 #endif 31 32 33 /* Value returned if `sem_open' failed. */ 34 #define SEM_FAILED ((sem_t *) 0) 35 36 37 typedef union 38 { 39 char __size[__SIZEOF_SEM_T]; 40 long int __align; 41 } sem_t; 42
