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1 | /* Linux/MIPS implementation of the shared memory struct shmid_ds. |
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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. */ |
24 | struct 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 | __time_t shm_dtime; /* time of last shmdt() */ |
34 | __time_t shm_ctime; /* time of last change by shmctl() */ |
35 | # else |
36 | __time_t shm_atime; /* time of last shmat() */ |
37 | __time_t shm_dtime; /* time of last shmdt() */ |
38 | __time_t shm_ctime; /* time of last change by shmctl() */ |
39 | # endif |
40 | __pid_t shm_cpid; /* pid of creator */ |
41 | __pid_t shm_lpid; /* pid of last shmop */ |
42 | shmatt_t shm_nattch; /* number of current attaches */ |
43 | # if __TIMESIZE == 32 |
44 | unsigned short int __shm_atime_high; |
45 | unsigned short int __shm_dtime_high; |
46 | unsigned short int __shm_ctime_high; |
47 | unsigned short int __glibc_reserved4; |
48 | # else |
49 | __syscall_ulong_t __glibc_reserved5; |
50 | __syscall_ulong_t __glibc_reserved6; |
51 | # endif |
52 | #endif |
53 | }; |
54 |
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