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1 | /* Copyright (C) 1995, 1996, 1997, 2000 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. | |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Library General Public License as | |
6 | published by the Free Software Foundation; either version 2 of the | |
7 | License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Library General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Library General Public | |
15 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
16 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
17 | Boston, MA 02111-1307, USA. */ | |
18 | ||
19 | #ifndef _SYS_SHM_H | |
20 | # error "Never include <bits/shm.h> directly; use <sys/shm.h> instead." | |
21 | #endif | |
22 | ||
0ed99ce4 | 23 | #include <bits/types.h> |
0482576e UD |
24 | #include <bits/wordsize.h> |
25 | ||
26 | /* Permission flag for shmget. */ | |
27 | #define SHM_R 0400 /* or S_IRUGO from <linux/stat.h> */ | |
28 | #define SHM_W 0200 /* or S_IWUGO from <linux/stat.h> */ | |
29 | ||
30 | /* Flags for `shmat'. */ | |
31 | #define SHM_RDONLY 010000 /* attach read-only else read-write */ | |
32 | #define SHM_RND 020000 /* round attach address to SHMLBA */ | |
33 | #define SHM_REMAP 040000 /* take-over region on attach */ | |
34 | ||
35 | /* Commands for `shmctl'. */ | |
36 | #define SHM_LOCK 11 /* lock segment (root only) */ | |
37 | #define SHM_UNLOCK 12 /* unlock segment (root only) */ | |
38 | ||
39 | ||
0ed99ce4 UD |
40 | /* Type to count number of attaches. */ |
41 | typedef unsigned long int shmatt_t; | |
42 | ||
0482576e UD |
43 | /* Data structure describing a set of semaphores. */ |
44 | struct shmid_ds | |
45 | { | |
46 | struct ipc_perm shm_perm; /* operation permission struct */ | |
47 | #if __WORDSIZE == 32 | |
48 | unsigned int __pad1; | |
49 | #endif | |
50 | __time_t shm_atime; /* time of last shmat() */ | |
51 | #if __WORDSIZE == 32 | |
52 | unsigned int __pad2; | |
53 | #endif | |
54 | __time_t shm_dtime; /* time of last shmdt() */ | |
55 | #if __WORDSIZE == 32 | |
56 | unsigned int __pad3; | |
57 | #endif | |
58 | __time_t shm_ctime; /* time of last change by shmctl() */ | |
59 | size_t shm_segsz; /* size of segment in bytes */ | |
0ed99ce4 UD |
60 | __pid_t shm_cpid; /* pid of creator */ |
61 | __pid_t shm_lpid; /* pid of last shmop */ | |
62 | shmatt_t shm_nattch; /* number of current attaches */ | |
0482576e UD |
63 | unsigned long int __unused1; |
64 | unsigned long int __unused2; | |
65 | }; | |
66 | ||
0482576e UD |
67 | #ifdef __USE_MISC |
68 | ||
69 | /* ipcs ctl commands */ | |
70 | # define SHM_STAT 13 | |
71 | # define SHM_INFO 14 | |
72 | ||
73 | /* shm_mode upper byte flags */ | |
74 | # define SHM_DEST 01000 /* segment will be destroyed on last detach */ | |
75 | # define SHM_LOCKED 02000 /* segment will not be swapped */ | |
76 | ||
77 | struct shminfo | |
78 | { | |
79 | unsigned long shmmax; | |
80 | unsigned long shmmin; | |
81 | unsigned long shmmni; | |
82 | unsigned long shmseg; | |
83 | unsigned long shmall; | |
84 | unsigned long __unused1; | |
85 | unsigned long __unused2; | |
86 | unsigned long __unused3; | |
87 | unsigned long __unused4; | |
88 | }; | |
89 | ||
0482576e UD |
90 | struct shm_info |
91 | { | |
92 | int used_ids; | |
93 | unsigned long int shm_tot; /* total allocated shm */ | |
94 | unsigned long int shm_rss; /* total resident shm */ | |
95 | unsigned long int shm_swp; /* total swapped shm */ | |
96 | unsigned long int swap_attempts; | |
97 | unsigned long int swap_successes; | |
98 | }; | |
99 | ||
100 | #endif /* __USE_MISC */ |