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568035b7 | 1 | /* Copyright (C) 1995-2013 Free Software Foundation, Inc. |
a0386a0d UD |
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 | |
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. | |
a0386a0d UD |
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 | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
a0386a0d | 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/>. */ | |
a0386a0d UD |
17 | |
18 | #ifndef _SYS_SHM_H | |
19 | # error "Never include <bits/shm.h> directly; use <sys/shm.h> instead." | |
20 | #endif | |
21 | ||
22 | #include <bits/types.h> | |
23 | ||
24 | /* Permission flag for shmget. */ | |
25 | #define SHM_R 0400 /* or S_IRUGO from <linux/stat.h> */ | |
26 | #define SHM_W 0200 /* or S_IWUGO from <linux/stat.h> */ | |
27 | ||
28 | /* Flags for `shmat'. */ | |
4f5ac20b AJ |
29 | #define SHM_RDONLY 010000 /* attach read-only else read-write */ |
30 | #define SHM_RND 020000 /* round attach address to SHMLBA */ | |
31 | #define SHM_REMAP 040000 /* take-over region on attach */ | |
32 | #define SHM_EXEC 0100000 /* execution access */ | |
a0386a0d UD |
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 | ||
a0386a0d UD |
44 | |
45 | /* Type to count number of attaches. */ | |
46 | typedef unsigned long int shmatt_t; | |
47 | ||
a0f6c236 | 48 | /* Data structure describing a shared memory segment. */ |
a0386a0d UD |
49 | struct shmid_ds |
50 | { | |
51 | struct ipc_perm shm_perm; /* operation permission struct */ | |
4a32f19d | 52 | #if __WORDSIZE == 32 |
d1d9eaf4 | 53 | unsigned int __glibc_reserved1; |
4a32f19d | 54 | #endif |
a0386a0d | 55 | __time_t shm_atime; /* time of last shmat() */ |
4a32f19d | 56 | #if __WORDSIZE == 32 |
d1d9eaf4 | 57 | unsigned int __glibc_reserved2; |
4a32f19d | 58 | #endif |
a0386a0d | 59 | __time_t shm_dtime; /* time of last shmdt() */ |
4a32f19d | 60 | #if __WORDSIZE == 32 |
d1d9eaf4 | 61 | unsigned int __glibc_reserved3; |
4a32f19d RM |
62 | #endif |
63 | __time_t shm_ctime; /* time of last change by shmctl() */ | |
64 | #if __WORDSIZE == 32 | |
d1d9eaf4 | 65 | unsigned int __glibc_reserved4; |
4a32f19d | 66 | #endif |
a0386a0d UD |
67 | size_t shm_segsz; /* size of segment in bytes */ |
68 | __pid_t shm_cpid; /* pid of creator */ | |
69 | __pid_t shm_lpid; /* pid of last shmop */ | |
70 | shmatt_t shm_nattch; /* number of current attaches */ | |
d1d9eaf4 OB |
71 | unsigned long __glibc_reserved5; |
72 | unsigned long __glibc_reserved6; | |
a0386a0d UD |
73 | }; |
74 | ||
75 | #ifdef __USE_MISC | |
76 | ||
77 | /* ipcs ctl commands */ | |
78 | # define SHM_STAT 13 | |
79 | # define SHM_INFO 14 | |
80 | ||
81 | /* shm_mode upper byte flags */ | |
2b7e8613 UD |
82 | # define SHM_DEST 01000 /* segment will be destroyed on last detach */ |
83 | # define SHM_LOCKED 02000 /* segment will not be swapped */ | |
48f936a2 | 84 | # define SHM_HUGETLB 04000 /* segment is mapped via hugetlb */ |
2b7e8613 | 85 | # define SHM_NORESERVE 010000 /* don't check for reservations */ |
a0386a0d UD |
86 | |
87 | struct shminfo | |
88 | { | |
89 | unsigned long int shmmax; | |
90 | unsigned long int shmmin; | |
91 | unsigned long int shmmni; | |
92 | unsigned long int shmseg; | |
93 | unsigned long int shmall; | |
d1d9eaf4 OB |
94 | unsigned long int __glibc_reserved1; |
95 | unsigned long int __glibc_reserved2; | |
96 | unsigned long int __glibc_reserved3; | |
97 | unsigned long int __glibc_reserved4; | |
a0386a0d UD |
98 | }; |
99 | ||
100 | struct shm_info | |
101 | { | |
102 | int used_ids; | |
103 | unsigned long int shm_tot; /* total allocated shm */ | |
104 | unsigned long int shm_rss; /* total resident shm */ | |
105 | unsigned long int shm_swp; /* total swapped shm */ | |
106 | unsigned long int swap_attempts; | |
107 | unsigned long int swap_successes; | |
108 | }; | |
109 | ||
110 | #endif /* __USE_MISC */ | |
2566e5f3 UD |
111 | |
112 | __END_DECLS |