sysdeps/unix/sysv/linux/bits/sem-pad.h

   1 /* Define where padding goes in struct semid_ds.  Generic version.
   2    Copyright (C) 2018 Free Software Foundation, Inc.
   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 _SYS_SEM_H
  20 # error "Never use <bits/sem-pad.h> directly; include <sys/sem.h> instead."
  21 #endif
  22
  23 #include <bits/timesize.h>
  24
  25 /* On most architectures, padding goes after time fields for 32-bit
  26    systems and is omitted for 64-bit systems.  Some architectures pad
  27    before time fields instead, or omit padding despite being 32-bit,
  28    or include it despite being 64-bit.  This must match the layout
  29    used for struct semid64_ds in <asm/sembuf.h>, as glibc does not do
  30    layout conversions for this structure.  */
  31
  32 #define __SEM_PAD_AFTER_TIME (__TIMESIZE == 32)
  33 #define __SEM_PAD_BEFORE_TIME 0