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688903eb | 1 | /* Copyright (C) 2000-2018 Free Software Foundation, Inc. |
d5efd131 MF |
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 | |
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. | |
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 | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
75efb018 MF |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
d5efd131 MF |
17 | |
18 | #ifndef _SYS_SHM_H | |
19 | # error "Never include <bits/shm.h> directly; use <sys/shm.h> instead." | |
20 | #endif | |
21 | ||
22 | #include <sys/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'. */ | |
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 */ | |
33 | ||
34 | /* Commands for `shmctl'. */ | |
35 | #define SHM_LOCK 11 /* lock segment (root only) */ | |
36 | #define SHM_UNLOCK 12 /* unlock segment (root only) */ | |
37 | ||
38 | /* Segment low boundary address multiple. */ | |
39 | #define SHMLBA (1024 * 1024) | |
40 | ||
41 | /* Type to count number of attaches. */ | |
42 | typedef unsigned long int shmatt_t; | |
43 | ||
44 | /* Data structure describing a shared memory segment. */ | |
45 | struct shmid_ds | |
46 | { | |
47 | struct ipc_perm shm_perm; /* operation permission struct */ | |
48 | size_t shm_segsz; /* size of segment in bytes */ | |
49 | __time_t shm_atime; /* time of last shmat() */ | |
50 | __time_t shm_dtime; /* time of last shmdt() */ | |
51 | __time_t shm_ctime; /* time of last change by shmctl() */ | |
52 | __pid_t shm_cpid; /* pid of creator */ | |
53 | __pid_t shm_lpid; /* pid of last shmop */ | |
54 | shmatt_t shm_nattch; /* number of current attaches */ | |
d1d9eaf4 OB |
55 | unsigned long int __glibc_reserved1; |
56 | unsigned long int __glibc_reserved2; | |
d5efd131 MF |
57 | }; |
58 | ||
59 | #ifdef __USE_MISC | |
60 | ||
61 | /* ipcs ctl commands */ | |
62 | # define SHM_STAT 13 | |
63 | # define SHM_INFO 14 | |
64 | ||
65 | /* shm_mode upper byte flags */ | |
66 | # define SHM_DEST 01000 /* segment will be destroyed on last detach */ | |
67 | # define SHM_LOCKED 02000 /* segment will not be swapped */ | |
68 | # define SHM_HUGETLB 04000 /* segment is mapped via hugetlb */ | |
69 | # define SHM_NORESERVE 010000 /* don't check for reservations */ | |
70 | ||
71 | struct shminfo | |
72 | { | |
73 | unsigned long int shmmax; | |
74 | unsigned long int shmmin; | |
75 | unsigned long int shmmni; | |
76 | unsigned long int shmseg; | |
77 | unsigned long int shmall; | |
d1d9eaf4 OB |
78 | unsigned long int __glibc_reserved1; |
79 | unsigned long int __glibc_reserved2; | |
80 | unsigned long int __glibc_reserved3; | |
81 | unsigned long int __glibc_reserved4; | |
d5efd131 MF |
82 | }; |
83 | ||
84 | struct shm_info | |
85 | { | |
86 | int used_ids; | |
87 | unsigned long int shm_tot; /* total allocated shm */ | |
88 | unsigned long int shm_rss; /* total resident shm */ | |
89 | unsigned long int shm_swp; /* total swapped shm */ | |
90 | unsigned long int swap_attempts; | |
91 | unsigned long int swap_successes; | |
92 | }; | |
93 | ||
94 | #endif /* __USE_MISC */ |