1: /* Copyright (C) 1995, 1996, 1997, 2000, 2002, 2004
    2:    Free Software Foundation, Inc.
    3:    This file is part of the GNU C Library.
    4: 
    5:    The GNU C Library is free software; you can redistribute it and/or
    6:    modify it under the terms of the GNU Lesser General Public
    7:    License as published by the Free Software Foundation; either
    8:    version 2.1 of the License, or (at your option) any later version.
    9: 
   10:    The GNU C Library is distributed in the hope that it will be useful,
   11:    but WITHOUT ANY WARRANTY; without even the implied warranty of
   12:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   13:    Lesser General Public License for more details.
   14: 
   15:    You should have received a copy of the GNU Lesser General Public
   16:    License along with the GNU C Library; if not, write to the Free
   17:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   18:    02111-1307 USA.  */
   19: 
   20: #ifndef _SYS_SHM_H
   21: # error "Never include <bits/shm.h> directly; use <sys/shm.h> instead."
   22: #endif
   23: 
   24: #include <bits/types.h>
   25: 
   26: /* Flags for `shmat'.  */
   27: #define SHM_RDONLY      010000               /* attach read-only else read-write */
   28: #define SHM_RND         020000         /* round attach address to SHMLBA */
   29: #define SHM_REMAP       040000                /* take-over region on attach */
   30: 
   31: /* Commands for `shmctl'.  */
   32: #define SHM_LOCK        11             /* lock segment (root only) */
   33: #define SHM_UNLOCK      12           /* unlock segment (root only) */
   34: 
   35: __BEGIN_DECLS
   36: 
   37: /* Segment low boundary address multiple.  */
   38: #define SHMLBA          (__getpagesize ())
   39: extern int __getpagesize (void) __THROW __attribute__ ((__const__));
   40: 
   41: 
   42: /* Type to count number of attaches.  */
   43: typedef unsigned short int shmatt_t;
   44: 
   45: /* Data structure describing a set of semaphores.  */
   46: struct shmid_ds
   47:   {
   48:     struct ipc_perm shm_perm;           /* operation permission struct */
   49:     int shm_segsz;                      /* size of segment in bytes */
   50:     __time_t shm_atime;                 /* time of last shmat() */
   51:     __time_t shm_dtime;                 /* time of last shmdt() */
   52:     __time_t shm_ctime;                 /* time of last change by shmctl() */
   53:     __pid_t shm_cpid;                   /* pid of creator */
   54:     __pid_t shm_lpid;                   /* pid of last shmop */
   55:     shmatt_t shm_nattch;                /* number of current attaches */
   56:   };
   57: 
   58: __END_DECLS