/* Copyright (C) 1995-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#ifndef _SYS_SHM_H

# error "Never include <bits/shm.h> directly; use <sys/shm.h> instead."

#endif

#include <bits/types.h>

/* Permission flag for shmget.  */

#define SHM_R          0400            /* or S_IRUGO from <linux/stat.h> */

#define SHM_W          0200            /* or S_IWUGO from <linux/stat.h> */

/* Flags for `shmat'.  */

#define SHM_RDONLY	010000          /* attach read-only else read-write */

#define SHM_RND		020000          /* round attach address to SHMLBA */

#define SHM_REMAP	040000          /* take-over region on attach */

#define SHM_EXEC	0100000		/* execution access */

/* Commands for `shmctl'.  */

#define SHM_LOCK       11              /* lock segment (root only) */

#define SHM_UNLOCK     12              /* unlock segment (root only) */

__BEGIN_DECLS

/* Segment low boundary address multiple.  */

#define SHMLBA		(__getpagesize ())

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

/* Type to count number of attaches.  */

typedef unsigned long int shmatt_t;

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

struct shmid_ds

  {

    struct ipc_perm shm_perm;          /* operation permission struct */

#if __WORDSIZE == 32

    unsigned int __glibc_reserved1;

#endif

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

#if __WORDSIZE == 32

    unsigned int __glibc_reserved2;

#endif

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

#if __WORDSIZE == 32

    unsigned int __glibc_reserved3;

#endif

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

#if __WORDSIZE == 32

    unsigned int __glibc_reserved4;

#endif

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

    __pid_t shm_cpid;                  /* pid of creator */

    __pid_t shm_lpid;                  /* pid of last shmop */

    shmatt_t shm_nattch;               /* number of current attaches */

    unsigned long __glibc_reserved5;

    unsigned long __glibc_reserved6;

  };

#ifdef __USE_MISC

/* ipcs ctl commands */

# define SHM_STAT      13

# define SHM_INFO      14

# define SHM_STAT_ANY	15

/* shm_mode upper byte flags */

# define SHM_DEST      01000	/* segment will be destroyed on last detach */

# define SHM_LOCKED    02000	/* segment will not be swapped */

# define SHM_HUGETLB   04000	/* segment is mapped via hugetlb */

# define SHM_NORESERVE 010000	/* don't check for reservations */

struct shminfo

  {

    unsigned long int shmmax;

    unsigned long int shmmin;

    unsigned long int shmmni;

    unsigned long int shmseg;

    unsigned long int shmall;

    unsigned long int __glibc_reserved1;

    unsigned long int __glibc_reserved2;

    unsigned long int __glibc_reserved3;

    unsigned long int __glibc_reserved4;

  };

struct shm_info

  {

    int used_ids;

    unsigned long int shm_tot; /* total allocated shm */

    unsigned long int shm_rss; /* total resident shm */

    unsigned long int shm_swp; /* total swapped shm */

    unsigned long int swap_attempts;

    unsigned long int swap_successes;

  };

#endif /* __USE_MISC */

__END_DECLS