text: /* 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() */
      __time_t shm_dtime;			/* time of last shmdt() */
      __time_t shm_ctime;			/* time of last change by shmctl() */
      __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 __unused1;
      unsigned long int __unused2;
    };
  
  #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
  