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f7a9f785 | 1 | /* Copyright (C) 1995-2016 Free Software Foundation, Inc. |
8a4b65b4 | 2 | This file is part of the GNU C Library. |
d2f5be2a | 3 | |
8a4b65b4 | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
d2f5be2a | 8 | |
8a4b65b4 UD |
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 | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
d2f5be2a | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
d2f5be2a | 17 | |
f4017d20 UD |
18 | #ifndef _SYS_SHM_H |
19 | # error "Never include <bits/shm.h> directly; use <sys/shm.h> instead." | |
20 | #endif | |
8a4b65b4 | 21 | |
0ed99ce4 | 22 | #include <bits/types.h> |
3efdabe7 | 23 | #include <bits/ipctypes.h> |
d2f5be2a | 24 | |
8145a974 UD |
25 | /* Permission flag for shmget. */ |
26 | #define SHM_R 0400 /* or S_IRUGO from <linux/stat.h> */ | |
27 | #define SHM_W 0200 /* or S_IWUGO from <linux/stat.h> */ | |
28 | ||
d2f5be2a UD |
29 | /* Flags for `shmat'. */ |
30 | #define SHM_RDONLY 010000 /* attach read-only else read-write */ | |
31 | #define SHM_RND 020000 /* round attach address to SHMLBA */ | |
32 | #define SHM_REMAP 040000 /* take-over region on attach */ | |
33 | ||
34 | /* Commands for `shmctl'. */ | |
35 | #define SHM_LOCK 11 /* lock segment (root only) */ | |
36 | #define SHM_UNLOCK 12 /* unlock segment (root only) */ | |
37 | ||
2566e5f3 UD |
38 | __BEGIN_DECLS |
39 | ||
ed5294d5 UD |
40 | /* Segment low boundary address multiple. */ |
41 | #define SHMLBA (__getpagesize ()) | |
42 | extern int __getpagesize (void) __THROW __attribute__ ((__const__)); | |
43 | ||
d2f5be2a | 44 | |
0ed99ce4 UD |
45 | /* Type to count number of attaches. */ |
46 | typedef unsigned short int shmatt_t; | |
47 | ||
a0f6c236 | 48 | /* Data structure describing a shared memory segment. */ |
d2f5be2a | 49 | struct shmid_ds |
f4017d20 UD |
50 | { |
51 | struct ipc_perm shm_perm; /* operation permission struct */ | |
52 | int shm_segsz; /* size of segment in bytes */ | |
53 | __time_t shm_atime; /* time of last shmat() */ | |
54 | __time_t shm_dtime; /* time of last shmdt() */ | |
55 | __time_t shm_ctime; /* time of last change by shmctl() */ | |
9756dfe1 UD |
56 | __ipc_pid_t shm_cpid; /* pid of creator */ |
57 | __ipc_pid_t shm_lpid; /* pid of last shmop */ | |
0ed99ce4 | 58 | shmatt_t shm_nattch; /* number of current attaches */ |
f4017d20 UD |
59 | unsigned short int __shm_npages; /* size of segment (pages) */ |
60 | unsigned long int *__shm_pages; /* array of ptrs to frames -> SHMMAX */ | |
61 | struct vm_area_struct *__attaches; /* descriptors for attaches */ | |
62 | }; | |
d2f5be2a | 63 | |
84724245 RM |
64 | #ifdef __USE_MISC |
65 | ||
66 | /* ipcs ctl commands */ | |
f4017d20 UD |
67 | # define SHM_STAT 13 |
68 | # define SHM_INFO 14 | |
84724245 RM |
69 | |
70 | /* shm_mode upper byte flags */ | |
f4017d20 UD |
71 | # define SHM_DEST 01000 /* segment will be destroyed on last detach */ |
72 | # define SHM_LOCKED 02000 /* segment will not be swapped */ | |
84724245 | 73 | |
8a4b65b4 | 74 | struct shminfo |
f4017d20 UD |
75 | { |
76 | int shmmax; | |
77 | int shmmin; | |
78 | int shmmni; | |
79 | int shmseg; | |
80 | int shmall; | |
81 | }; | |
84724245 | 82 | |
8a4b65b4 | 83 | struct shm_info |
f4017d20 | 84 | { |
9756dfe1 UD |
85 | int used_ids; |
86 | unsigned long int shm_tot; /* total allocated shm */ | |
87 | unsigned long int shm_rss; /* total resident shm */ | |
88 | unsigned long int shm_swp; /* total swapped shm */ | |
89 | unsigned long int swap_attempts; | |
90 | unsigned long int swap_successes; | |
f4017d20 | 91 | }; |
84724245 RM |
92 | |
93 | #endif /* __USE_MISC */ | |
2566e5f3 UD |
94 | |
95 | __END_DECLS |