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109 lines
3.6 KiB
C
109 lines
3.6 KiB
C
/* Copyright (C) 1995-2025 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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<https://www.gnu.org/licenses/>. */
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#ifndef _SYS_SHM_H
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# error "Never include <bits/shm.h> directly; use <sys/shm.h> instead."
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#endif
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#include <bits/types.h>
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#include <bits/wordsize.h>
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#include <bits/shmlba.h>
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/* Permission flag for shmget. */
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#define SHM_R 0400 /* or S_IRUGO from <linux/stat.h> */
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#define SHM_W 0200 /* or S_IWUGO from <linux/stat.h> */
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/* Flags for `shmat'. */
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#define SHM_RDONLY 010000 /* attach read-only else read-write */
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#define SHM_RND 020000 /* round attach address to SHMLBA */
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#define SHM_REMAP 040000 /* take-over region on attach */
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#define SHM_EXEC 0100000 /* execution access */
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/* Commands for `shmctl'. */
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#define SHM_LOCK 11 /* lock segment (root only) */
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#define SHM_UNLOCK 12 /* unlock segment (root only) */
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__BEGIN_DECLS
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/* Type to count number of attaches. */
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typedef __syscall_ulong_t shmatt_t;
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#include <bits/types/struct_shmid_ds.h>
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#include <bits/types/struct_shmid64_ds.h>
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#ifdef __USE_MISC
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/* ipcs ctl commands */
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# define SHM_STAT 13
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# define SHM_INFO 14
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# define SHM_STAT_ANY 15
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/* shm_mode upper byte flags */
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# define SHM_DEST 01000 /* segment will be destroyed on last detach */
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# define SHM_LOCKED 02000 /* segment will not be swapped */
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# define SHM_HUGETLB 04000 /* segment is mapped via hugetlb */
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# define SHM_NORESERVE 010000 /* don't check for reservations */
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/* When SHM_HUGETLB is set, bits [26:31] encode the log2 of the huge page size.
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The following definitions are associated with this huge page size encoding.
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It is responsibility of the application to know which sizes are supported on
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the running system. See shmget(2) man page for details. */
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#define SHM_HUGE_SHIFT 26
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#define SHM_HUGE_MASK 0x3f
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#define SHM_HUGE_16KB (14 << SHM_HUGE_SHIFT)
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#define SHM_HUGE_64KB (16 << SHM_HUGE_SHIFT)
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#define SHM_HUGE_512KB (19 << SHM_HUGE_SHIFT)
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#define SHM_HUGE_1MB (20 << SHM_HUGE_SHIFT)
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#define SHM_HUGE_2MB (21 << SHM_HUGE_SHIFT)
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#define SHM_HUGE_8MB (23 << SHM_HUGE_SHIFT)
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#define SHM_HUGE_16MB (24 << SHM_HUGE_SHIFT)
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#define SHM_HUGE_32MB (25 << SHM_HUGE_SHIFT)
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#define SHM_HUGE_256MB (28 << SHM_HUGE_SHIFT)
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#define SHM_HUGE_512MB (29 << SHM_HUGE_SHIFT)
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#define SHM_HUGE_1GB (30 << SHM_HUGE_SHIFT)
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#define SHM_HUGE_2GB (31 << SHM_HUGE_SHIFT)
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#define SHM_HUGE_16GB (34U << SHM_HUGE_SHIFT)
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struct shminfo
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{
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__syscall_ulong_t shmmax;
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__syscall_ulong_t shmmin;
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__syscall_ulong_t shmmni;
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__syscall_ulong_t shmseg;
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__syscall_ulong_t shmall;
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__syscall_ulong_t __glibc_reserved1;
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__syscall_ulong_t __glibc_reserved2;
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__syscall_ulong_t __glibc_reserved3;
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__syscall_ulong_t __glibc_reserved4;
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};
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struct shm_info
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{
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int used_ids;
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__syscall_ulong_t shm_tot; /* total allocated shm */
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__syscall_ulong_t shm_rss; /* total resident shm */
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__syscall_ulong_t shm_swp; /* total swapped shm */
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__syscall_ulong_t swap_attempts;
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__syscall_ulong_t swap_successes;
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};
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#endif /* __USE_MISC */
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__END_DECLS
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