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04277e02 | 1 | /* Copyright (C) 1995-2019 Free Software Foundation, Inc. |
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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. | |
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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. |
0482576e | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
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17 | |
18 | #ifndef _SYS_SHM_H | |
19 | # error "Never include <bits/shm.h> directly; use <sys/shm.h> instead." | |
20 | #endif | |
21 | ||
0ed99ce4 | 22 | #include <bits/types.h> |
2a4b25fa | 23 | #include <bits/wordsize.h> |
8c8d2a8a | 24 | #include <bits/shmlba.h> |
729f3402 | 25 | #include <bits/shm-pad.h> |
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26 | |
27 | /* Permission flag for shmget. */ | |
28 | #define SHM_R 0400 /* or S_IRUGO from <linux/stat.h> */ | |
29 | #define SHM_W 0200 /* or S_IWUGO from <linux/stat.h> */ | |
30 | ||
31 | /* Flags for `shmat'. */ | |
32 | #define SHM_RDONLY 010000 /* attach read-only else read-write */ | |
33 | #define SHM_RND 020000 /* round attach address to SHMLBA */ | |
34 | #define SHM_REMAP 040000 /* take-over region on attach */ | |
4f5ac20b | 35 | #define SHM_EXEC 0100000 /* execution access */ |
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36 | |
37 | /* Commands for `shmctl'. */ | |
38 | #define SHM_LOCK 11 /* lock segment (root only) */ | |
39 | #define SHM_UNLOCK 12 /* unlock segment (root only) */ | |
40 | ||
7543b60c UD |
41 | __BEGIN_DECLS |
42 | ||
0ed99ce4 | 43 | /* Type to count number of attaches. */ |
729f3402 JM |
44 | typedef __syscall_ulong_t shmatt_t; |
45 | ||
46 | #if __SHM_PAD_BEFORE_TIME | |
47 | # define __SHM_PAD_TIME(NAME, RES) \ | |
48 | unsigned long int __glibc_reserved ## RES; __time_t NAME | |
49 | #elif __SHM_PAD_AFTER_TIME | |
50 | # define __SHM_PAD_TIME(NAME, RES) \ | |
51 | __time_t NAME; unsigned long int __glibc_reserved ## RES | |
52 | #else | |
53 | # define __SHM_PAD_TIME(NAME, RES) \ | |
54 | __time_t NAME | |
55 | #endif | |
0ed99ce4 | 56 | |
a0f6c236 | 57 | /* Data structure describing a shared memory segment. */ |
0482576e UD |
58 | struct shmid_ds |
59 | { | |
60 | struct ipc_perm shm_perm; /* operation permission struct */ | |
729f3402 | 61 | #if !__SHM_SEGSZ_AFTER_TIME |
0482576e | 62 | size_t shm_segsz; /* size of segment in bytes */ |
2a4b25fa | 63 | #endif |
729f3402 JM |
64 | __SHM_PAD_TIME (shm_atime, 1); /* time of last shmat() */ |
65 | __SHM_PAD_TIME (shm_dtime, 2); /* time of last shmdt() */ | |
66 | __SHM_PAD_TIME (shm_ctime, 3); /* time of last change by shmctl() */ | |
67 | #if __SHM_PAD_BETWEEN_TIME_AND_SEGSZ | |
68 | unsigned long int __glibc_reserved4; | |
2a4b25fa | 69 | #endif |
729f3402 JM |
70 | #if __SHM_SEGSZ_AFTER_TIME |
71 | size_t shm_segsz; /* size of segment in bytes */ | |
2a4b25fa | 72 | #endif |
0ed99ce4 UD |
73 | __pid_t shm_cpid; /* pid of creator */ |
74 | __pid_t shm_lpid; /* pid of last shmop */ | |
75 | shmatt_t shm_nattch; /* number of current attaches */ | |
729f3402 JM |
76 | __syscall_ulong_t __glibc_reserved5; |
77 | __syscall_ulong_t __glibc_reserved6; | |
0482576e UD |
78 | }; |
79 | ||
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80 | #ifdef __USE_MISC |
81 | ||
82 | /* ipcs ctl commands */ | |
83 | # define SHM_STAT 13 | |
84 | # define SHM_INFO 14 | |
f2857da7 | 85 | # define SHM_STAT_ANY 15 |
0482576e UD |
86 | |
87 | /* shm_mode upper byte flags */ | |
88 | # define SHM_DEST 01000 /* segment will be destroyed on last detach */ | |
89 | # define SHM_LOCKED 02000 /* segment will not be swapped */ | |
48f936a2 | 90 | # define SHM_HUGETLB 04000 /* segment is mapped via hugetlb */ |
2b7e8613 | 91 | # define SHM_NORESERVE 010000 /* don't check for reservations */ |
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92 | |
93 | struct shminfo | |
94 | { | |
729f3402 JM |
95 | __syscall_ulong_t shmmax; |
96 | __syscall_ulong_t shmmin; | |
97 | __syscall_ulong_t shmmni; | |
98 | __syscall_ulong_t shmseg; | |
99 | __syscall_ulong_t shmall; | |
100 | __syscall_ulong_t __glibc_reserved1; | |
101 | __syscall_ulong_t __glibc_reserved2; | |
102 | __syscall_ulong_t __glibc_reserved3; | |
103 | __syscall_ulong_t __glibc_reserved4; | |
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104 | }; |
105 | ||
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106 | struct shm_info |
107 | { | |
108 | int used_ids; | |
729f3402 JM |
109 | __syscall_ulong_t shm_tot; /* total allocated shm */ |
110 | __syscall_ulong_t shm_rss; /* total resident shm */ | |
111 | __syscall_ulong_t shm_swp; /* total swapped shm */ | |
112 | __syscall_ulong_t swap_attempts; | |
113 | __syscall_ulong_t swap_successes; | |
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114 | }; |
115 | ||
116 | #endif /* __USE_MISC */ | |
2566e5f3 UD |
117 | |
118 | __END_DECLS |