libpthread/nptl/sysdeps/unix/sysv/linux/aarch64/bits/semaphore.h

   1 /* Copyright (C) 2002-2017 Free Software Foundation, Inc.
   2
   3    The GNU C Library is free software; you can redistribute it and/or
   4    modify it under the terms of the GNU Lesser General Public
   5    License as published by the Free Software Foundation; either
   6    version 2.1 of the License, or (at your option) any later version.
   7
   8    The GNU C Library is distributed in the hope that it will be useful,
   9    but WITHOUT ANY WARRANTY; without even the implied warranty of
  10    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11    Lesser General Public License for more details.
  12
  13    You should have received a copy of the GNU Lesser General Public
  14    License along with the GNU C Library; if not, see
  15    <http://www.gnu.org/licenses/>.  */
  16
  17 #ifndef _SEMAPHORE_H
  18 # error "Never use <bits/semaphore.h> directly; include <semaphore.h> instead."
  19 #endif
  20
  21 #define __SIZEOF_SEM_T  32
  22
  23 /* Value returned if `sem_open' failed.  */
  24 #define SEM_FAILED      ((sem_t *) 0)
  25
  26 typedef union
  27 {
  28   char __size[__SIZEOF_SEM_T];
  29   long long int __align;
  30 } sem_t;