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b168057a | 1 | /* Copyright (C) 2011-2015 Free Software Foundation, Inc. |
4a93ed42 CM |
2 | This file is part of the GNU C Library. |
3 | Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. | |
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 | |
ab84e3ff PE |
16 | License along with the GNU C Library. If not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
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18 | |
19 | #ifndef _SYS_SHM_H | |
20 | # error "Never include <bits/shm.h> directly; use <sys/shm.h> instead." | |
21 | #endif | |
22 | ||
23 | #include <bits/types.h> | |
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 | #define SHM_EXEC 0100000 /* execution access */ | |
35 | ||
36 | /* Commands for `shmctl'. */ | |
37 | #define SHM_LOCK 11 /* lock segment (root only) */ | |
38 | #define SHM_UNLOCK 12 /* unlock segment (root only) */ | |
39 | ||
40 | __BEGIN_DECLS | |
41 | ||
42 | /* Segment low boundary address multiple. */ | |
43 | #define SHMLBA (__getpagesize ()) | |
44 | extern int __getpagesize (void) __THROW __attribute__ ((__const__)); | |
45 | ||
46 | ||
47 | /* Type to count number of attaches. */ | |
48 | typedef unsigned long int shmatt_t; | |
49 | ||
50 | /* Data structure describing a shared memory segment. */ | |
51 | struct shmid_ds | |
52 | { | |
53 | struct ipc_perm shm_perm; /* operation permission struct */ | |
54 | size_t shm_segsz; /* size of segment in bytes */ | |
55 | __time_t shm_atime; /* time of last shmat() */ | |
56 | #if __WORDSIZE == 32 | |
d1d9eaf4 | 57 | unsigned long int __glibc_reserved1; |
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58 | #endif |
59 | __time_t shm_dtime; /* time of last shmdt() */ | |
60 | #if __WORDSIZE == 32 | |
d1d9eaf4 | 61 | unsigned long int __glibc_reserved2; |
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62 | #endif |
63 | __time_t shm_ctime; /* time of last change by shmctl() */ | |
64 | #if __WORDSIZE == 32 | |
d1d9eaf4 | 65 | unsigned long int __glibc_reserved3; |
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66 | #endif |
67 | __pid_t shm_cpid; /* pid of creator */ | |
68 | __pid_t shm_lpid; /* pid of last shmop */ | |
69 | shmatt_t shm_nattch; /* number of current attaches */ | |
d1d9eaf4 OB |
70 | unsigned long int __glibc_reserved4; |
71 | unsigned long int __glibc_reserved5; | |
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72 | }; |
73 | ||
74 | #ifdef __USE_MISC | |
75 | ||
76 | /* ipcs ctl commands */ | |
77 | # define SHM_STAT 13 | |
78 | # define SHM_INFO 14 | |
79 | ||
80 | /* shm_mode upper byte flags */ | |
81 | # define SHM_DEST 01000 /* segment will be destroyed on last detach */ | |
82 | # define SHM_LOCKED 02000 /* segment will not be swapped */ | |
83 | # define SHM_HUGETLB 04000 /* segment is mapped via hugetlb */ | |
84 | # define SHM_NORESERVE 010000 /* don't check for reservations */ | |
85 | ||
86 | struct shminfo | |
87 | { | |
88 | unsigned long int shmmax; | |
89 | unsigned long int shmmin; | |
90 | unsigned long int shmmni; | |
91 | unsigned long int shmseg; | |
92 | unsigned long int shmall; | |
d1d9eaf4 OB |
93 | unsigned long int __glibc_reserved1; |
94 | unsigned long int __glibc_reserved2; | |
95 | unsigned long int __glibc_reserved3; | |
96 | unsigned long int __glibc_reserved4; | |
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97 | }; |
98 | ||
99 | struct shm_info | |
100 | { | |
101 | int used_ids; | |
102 | unsigned long int shm_tot; /* total allocated shm */ | |
103 | unsigned long int shm_rss; /* total resident shm */ | |
104 | unsigned long int shm_swp; /* total swapped shm */ | |
105 | unsigned long int swap_attempts; | |
106 | unsigned long int swap_successes; | |
107 | }; | |
108 | ||
109 | #endif /* __USE_MISC */ | |
110 | ||
111 | __END_DECLS |