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/* Copyright (C) 1995,1996,1997,2000,2002,2004 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, write to the Free

   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA

   02111-1307 USA.  */

#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 */

/* 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 set of semaphores.  */

struct shmid_ds

  {

    struct ipc_perm shm_perm;           /* operation permission struct */

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

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

    unsigned long int __unused1;

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

    unsigned long int __unused2;

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

    unsigned long int __unused3;

    __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 int __unused4;

    unsigned long int __unused5;

  };

#ifdef __USE_MISC

/* ipcs ctl commands */

# define SHM_STAT       13

# define SHM_INFO       14

/* 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 __unused1;

    unsigned long int __unused2;

    unsigned long int __unused3;

    unsigned long int __unused4;

  };

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