38 lines
1.6 KiB
C
38 lines
1.6 KiB
C
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/* Define where padding goes in struct shmid_ds. Generic version.
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Copyright (C) 2018-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _SYS_SHM_H
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# error "Never use <bits/shm-pad.h> directly; include <sys/shm.h> instead."
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#endif
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#include <bits/timesize.h>
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/* On most architectures, padding goes after time fields for 32-bit
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systems and is omitted for 64-bit systems. Some architectures pad
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before time fields instead, or omit padding despite being 32-bit,
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or include it despite being 64-bit. Furthermore, some
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architectures place shm_segsz after the time fields rather than
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before them, with or without padding there. This must match the
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layout used for struct shmid64_ds in <asm/shmbuf.h>, as glibc does
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not do layout conversions for this structure. */
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#define __SHM_PAD_AFTER_TIME (__TIMESIZE == 32)
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#define __SHM_PAD_BEFORE_TIME 0
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#define __SHM_SEGSZ_AFTER_TIME 0
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#define __SHM_PAD_BETWEEN_TIME_AND_SEGSZ 0
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