| 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556 |
- /* Copyright (C) 1995-2026 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
- <https://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>
- /* 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 short int shmatt_t;
- /* Data structure describing a shared memory segment. */
- 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 */
- };
- __END_DECLS
|
