/* Copyright (C) 1995-2018 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 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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/* 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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/* Segment low boundary address multiple. */

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#define SHMLBA (__getpagesize ())

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extern int __getpagesize (void) __THROW __attribute__ ((__const__));

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/* Type to count number of attaches. */

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typedef __syscall_ulong_t shmatt_t;

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/* Data structure describing a shared memory segment. */

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struct shmid_ds

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{

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struct ipc_perm shm_perm; /* operation permission struct */

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size_t shm_segsz; /* size of segment in bytes */

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__time_t shm_atime; /* time of last shmat() */

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#ifndef __x86_64__

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unsigned long int __glibc_reserved1;

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#endif

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__time_t shm_dtime; /* time of last shmdt() */

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#ifndef __x86_64__

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unsigned long int __glibc_reserved2;

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#endif

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__time_t shm_ctime; /* time of last change by shmctl() */

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#ifndef __x86_64__

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unsigned long int __glibc_reserved3;

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#endif

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__pid_t shm_cpid; /* pid of creator */

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__pid_t shm_lpid; /* pid of last shmop */

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shmatt_t shm_nattch; /* number of current attaches */

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__syscall_ulong_t __glibc_reserved4;

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__syscall_ulong_t __glibc_reserved5;

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};

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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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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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