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568035b7 | 1 | /* Copyright (C) 1995-2013 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 | |
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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 | |
3214b89b | 12 | Lesser General Public License for more details. |
a7b22345 | 13 | |
3214b89b | 14 | You should have received a copy of the GNU Lesser General Public |
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15 | License along with the GNU C Library. If not, see |
16 | <http://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 | ||
2c11d9bc | 22 | #include <bits/types.h> |
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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'. */ | |
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 */ | |
53c2cb76 | 32 | #define SHM_EXEC 0100000 /* execution access */ |
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33 | |
34 | /* Commands for `shmctl'. */ | |
35 | #define SHM_LOCK 11 /* lock segment (root only) */ | |
36 | #define SHM_UNLOCK 12 /* unlock segment (root only) */ | |
37 | ||
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38 | __BEGIN_DECLS |
39 | ||
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40 | /* Segment low boundary address multiple. */ |
41 | #define SHMLBA (__getpagesize ()) | |
42 | extern int __getpagesize (void) __THROW __attribute__ ((__const__)); | |
43 | ||
a7b22345 | 44 | |
2c11d9bc UD |
45 | /* Type to count number of attaches. */ |
46 | typedef unsigned long int shmatt_t; | |
47 | ||
ec5d6360 | 48 | /* Data structure describing a shared memory segment. */ |
a7b22345 UD |
49 | struct shmid_ds |
50 | { | |
51 | struct ipc_perm shm_perm; /* operation permission struct */ | |
52 | size_t 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() */ | |
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56 | __pid_t shm_cpid; /* pid of creator */ |
57 | __pid_t shm_lpid; /* pid of last shmop */ | |
58 | shmatt_t shm_nattch; /* number of current attaches */ | |
d1d9eaf4 OB |
59 | unsigned long int __glibc_reserved1; |
60 | unsigned long int __glibc_reserved2; | |
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61 | }; |
62 | ||
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63 | #ifdef __USE_MISC |
64 | ||
65 | /* ipcs ctl commands */ | |
66 | # define SHM_STAT 13 | |
67 | # define SHM_INFO 14 | |
68 | ||
69 | /* shm_mode upper byte flags */ | |
70 | # define SHM_DEST 01000 /* segment will be destroyed on last detach */ | |
71 | # define SHM_LOCKED 02000 /* segment will not be swapped */ | |
9526f1fb | 72 | # define SHM_HUGETLB 04000 /* segment is mapped via hugetlb */ |
8e968c00 | 73 | # define SHM_NORESERVE 010000 /* don't check for reservations */ |
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74 | |
75 | struct shminfo | |
76 | { | |
77 | unsigned long int shmmax; | |
78 | unsigned long int shmmin; | |
79 | unsigned long int shmmni; | |
80 | unsigned long int shmseg; | |
81 | unsigned long int shmall; | |
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82 | unsigned long int __glibc_reserved1; |
83 | unsigned long int __glibc_reserved2; | |
84 | unsigned long int __glibc_reserved3; | |
85 | unsigned long int __glibc_reserved4; | |
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86 | }; |
87 | ||
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88 | struct shm_info |
89 | { | |
90 | int used_ids; | |
91 | unsigned long int shm_tot; /* total allocated shm */ | |
92 | unsigned long int shm_rss; /* total resident shm */ | |
93 | unsigned long int shm_swp; /* total swapped shm */ | |
94 | unsigned long int swap_attempts; | |
95 | unsigned long int swap_successes; | |
96 | }; | |
97 | ||
98 | #endif /* __USE_MISC */ | |
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99 | |
100 | __END_DECLS |