1/* Generic implementation of the shared memory struct shmid_ds.
2 Copyright (C) 2020-2024 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, see
17 <https://www.gnu.org/licenses/>. */
18
19#ifndef _SYS_SHM_H
20# error "Never include <bits/types/struct_shmid_ds.h> directly; use <sys/shm.h> instead."
21#endif
22
23/* Data structure describing a shared memory segment. */
24struct shmid_ds
25 {
26#ifdef __USE_TIME_BITS64
27# include <bits/types/struct_shmid64_ds_helper.h>
28#else
29 struct ipc_perm shm_perm; /* operation permission struct */
30 size_t shm_segsz; /* size of segment in bytes */
31# if __TIMESIZE == 32
32 __time_t shm_atime; /* time of last shmat() */
33 unsigned long int __shm_atime_high;
34 __time_t shm_dtime; /* time of last shmdt() */
35 unsigned long int __shm_dtime_high;
36 __time_t shm_ctime; /* time of last change by shmctl() */
37 unsigned long int __shm_ctime_high;
38# else
39 __time_t shm_atime; /* time of last shmat() */
40 __time_t shm_dtime; /* time of last shmdt() */
41 __time_t shm_ctime; /* time of last change by shmctl() */
42# endif
43 __pid_t shm_cpid; /* pid of creator */
44 __pid_t shm_lpid; /* pid of last shmop */
45 shmatt_t shm_nattch; /* number of current attaches */
46 __syscall_ulong_t __glibc_reserved5;
47 __syscall_ulong_t __glibc_reserved6;
48#endif
49 };
50