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2566e5f3 UD |
1 | /* Copyright (C) 1995, 1996, 1997, 2000, 2002, 2004 |
2 | Free Software Foundation, Inc. | |
6d52618b | 3 | This file is part of the GNU C Library. |
60478656 | 4 | |
6d52618b | 5 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
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. | |
60478656 | 9 | |
6d52618b UD |
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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
60478656 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
60478656 | 18 | |
5107cf1d | 19 | #ifndef _SYS_SHM_H |
f4017d20 | 20 | # error "Never include <bits/shm.h> directly; use <sys/shm.h> instead." |
5107cf1d UD |
21 | #endif |
22 | ||
0ed99ce4 | 23 | #include <bits/types.h> |
60478656 RM |
24 | |
25 | /* Flags for `shmat'. */ | |
26 | #define SHM_RDONLY 010000 /* attach read-only else read-write */ | |
27 | #define SHM_RND 020000 /* round attach address to SHMLBA */ | |
28 | #define SHM_REMAP 040000 /* take-over region on attach */ | |
29 | ||
30 | /* Commands for `shmctl'. */ | |
31 | #define SHM_LOCK 11 /* lock segment (root only) */ | |
32 | #define SHM_UNLOCK 12 /* unlock segment (root only) */ | |
33 | ||
2566e5f3 UD |
34 | __BEGIN_DECLS |
35 | ||
ed5294d5 UD |
36 | /* Segment low boundary address multiple. */ |
37 | #define SHMLBA (__getpagesize ()) | |
38 | extern int __getpagesize (void) __THROW __attribute__ ((__const__)); | |
39 | ||
60478656 | 40 | |
0ed99ce4 UD |
41 | /* Type to count number of attaches. */ |
42 | typedef unsigned short int shmatt_t; | |
43 | ||
a0f6c236 | 44 | /* Data structure describing a shared memory segment. */ |
60478656 | 45 | struct shmid_ds |
f4017d20 | 46 | { |
924c3f59 | 47 | struct ipc_perm shm_perm; /* operation permission struct */ |
f4017d20 | 48 | int shm_segsz; /* size of segment in bytes */ |
924c3f59 UD |
49 | __time_t shm_atime; /* time of last shmat() */ |
50 | __time_t shm_dtime; /* time of last shmdt() */ | |
51 | __time_t shm_ctime; /* time of last change by shmctl() */ | |
f4017d20 UD |
52 | __pid_t shm_cpid; /* pid of creator */ |
53 | __pid_t shm_lpid; /* pid of last shmop */ | |
0ed99ce4 | 54 | shmatt_t shm_nattch; /* number of current attaches */ |
f4017d20 | 55 | }; |
2566e5f3 UD |
56 | |
57 | __END_DECLS |