47 lines
1.9 KiB
C
47 lines
1.9 KiB
C
/* Copyright (C) 1995, 1996, 1997 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 Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. 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 <sys/types.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) */
|
|
|
|
|
|
/* Data structure describing a set of semaphores. */
|
|
struct shmid_ds
|
|
{
|
|
struct ipc_perm sem_perm; /* operation permission struct */
|
|
int shm_segsz; /* size of segment in bytes */
|
|
__time_t sem_atime; /* time of last shmat() */
|
|
__time_t sem_dtime; /* time of last shmdt() */
|
|
__time_t sem_ctime; /* time of last change by shmctl() */
|
|
__pid_t shm_cpid; /* pid of creator */
|
|
__pid_t shm_lpid; /* pid of last shmop */
|
|
unsigned short int shm_nattch; /* number of current attaches */
|
|
};
|