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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 | |
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 |
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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 | ||
0ed99ce4 | 22 | #include <bits/types.h> |
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23 | #include <bits/wordsize.h> |
24 | ||
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 | ||
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 */ | |
4f5ac20b | 33 | #define SHM_EXEC 0100000 /* execution access */ |
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34 | |
35 | /* Commands for `shmctl'. */ | |
36 | #define SHM_LOCK 11 /* lock segment (root only) */ | |
37 | #define SHM_UNLOCK 12 /* unlock segment (root only) */ | |
38 | ||
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39 | __BEGIN_DECLS |
40 | ||
ed5294d5 | 41 | /* Segment low boundary address multiple. */ |
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42 | #define SHMLBA (__getshmlba ()) |
43 | extern int __getshmlba (void) __attribute__ ((__const__)); | |
ed5294d5 | 44 | |
0482576e | 45 | |
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46 | /* Type to count number of attaches. */ |
47 | typedef unsigned long int shmatt_t; | |
48 | ||
a0f6c236 | 49 | /* Data structure describing a shared memory segment. */ |
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50 | struct shmid_ds |
51 | { | |
52 | struct ipc_perm shm_perm; /* operation permission struct */ | |
53 | #if __WORDSIZE == 32 | |
54 | unsigned int __pad1; | |
55 | #endif | |
56 | __time_t shm_atime; /* time of last shmat() */ | |
57 | #if __WORDSIZE == 32 | |
58 | unsigned int __pad2; | |
59 | #endif | |
60 | __time_t shm_dtime; /* time of last shmdt() */ | |
61 | #if __WORDSIZE == 32 | |
62 | unsigned int __pad3; | |
63 | #endif | |
64 | __time_t shm_ctime; /* time of last change by shmctl() */ | |
65 | size_t shm_segsz; /* size of segment in bytes */ | |
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66 | __pid_t shm_cpid; /* pid of creator */ |
67 | __pid_t shm_lpid; /* pid of last shmop */ | |
68 | shmatt_t shm_nattch; /* number of current attaches */ | |
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69 | unsigned long int __glibc_reserved1; |
70 | unsigned long int __glibc_reserved2; | |
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71 | }; |
72 | ||
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73 | #ifdef __USE_MISC |
74 | ||
75 | /* ipcs ctl commands */ | |
76 | # define SHM_STAT 13 | |
77 | # define SHM_INFO 14 | |
78 | ||
79 | /* shm_mode upper byte flags */ | |
80 | # define SHM_DEST 01000 /* segment will be destroyed on last detach */ | |
81 | # define SHM_LOCKED 02000 /* segment will not be swapped */ | |
48f936a2 | 82 | # define SHM_HUGETLB 04000 /* segment is mapped via hugetlb */ |
2b7e8613 | 83 | # define SHM_NORESERVE 010000 /* don't check for reservations */ |
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84 | |
85 | struct shminfo | |
86 | { | |
87 | unsigned long shmmax; | |
88 | unsigned long shmmin; | |
89 | unsigned long shmmni; | |
90 | unsigned long shmseg; | |
91 | unsigned long shmall; | |
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92 | unsigned long __glibc_reserved1; |
93 | unsigned long __glibc_reserved2; | |
94 | unsigned long __glibc_reserved3; | |
95 | unsigned long __glibc_reserved4; | |
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96 | }; |
97 | ||
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98 | struct shm_info |
99 | { | |
100 | int used_ids; | |
101 | unsigned long int shm_tot; /* total allocated shm */ | |
102 | unsigned long int shm_rss; /* total resident shm */ | |
103 | unsigned long int shm_swp; /* total swapped shm */ | |
104 | unsigned long int swap_attempts; | |
105 | unsigned long int swap_successes; | |
106 | }; | |
107 | ||
108 | #endif /* __USE_MISC */ | |
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109 | |
110 | __END_DECLS |