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[glibc.git] / sysdeps / unix / sysv / linux / powerpc / bits / shm.h
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1 /* Copyright (C) 1995-2014 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
18 #ifndef _SYS_SHM_H
19 # error "Never include <bits/shm.h> directly; use <sys/shm.h> instead."
20 #endif
22 #include <bits/types.h>
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> */
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 */
34 /* Commands for `shmctl'. */
35 #define SHM_LOCK 11 /* lock segment (root only) */
36 #define SHM_UNLOCK 12 /* unlock segment (root only) */
38 __BEGIN_DECLS
40 /* Segment low boundary address multiple. */
41 #define SHMLBA (__getpagesize ())
42 extern int __getpagesize (void) __THROW __attribute__ ((__const__));
45 /* Type to count number of attaches. */
46 typedef unsigned long int shmatt_t;
48 /* Data structure describing a shared memory segment. */
49 struct shmid_ds
51 struct ipc_perm shm_perm; /* operation permission struct */
52 #if __WORDSIZE == 32
53 unsigned int __glibc_reserved1;
54 #endif
55 __time_t shm_atime; /* time of last shmat() */
56 #if __WORDSIZE == 32
57 unsigned int __glibc_reserved2;
58 #endif
59 __time_t shm_dtime; /* time of last shmdt() */
60 #if __WORDSIZE == 32
61 unsigned int __glibc_reserved3;
62 #endif
63 __time_t shm_ctime; /* time of last change by shmctl() */
64 #if __WORDSIZE == 32
65 unsigned int __glibc_reserved4;
66 #endif
67 size_t shm_segsz; /* size of segment in bytes */
68 __pid_t shm_cpid; /* pid of creator */
69 __pid_t shm_lpid; /* pid of last shmop */
70 shmatt_t shm_nattch; /* number of current attaches */
71 unsigned long __glibc_reserved5;
72 unsigned long __glibc_reserved6;
75 #ifdef __USE_MISC
77 /* ipcs ctl commands */
78 # define SHM_STAT 13
79 # define SHM_INFO 14
81 /* shm_mode upper byte flags */
82 # define SHM_DEST 01000 /* segment will be destroyed on last detach */
83 # define SHM_LOCKED 02000 /* segment will not be swapped */
84 # define SHM_HUGETLB 04000 /* segment is mapped via hugetlb */
85 # define SHM_NORESERVE 010000 /* don't check for reservations */
87 struct shminfo
89 unsigned long int shmmax;
90 unsigned long int shmmin;
91 unsigned long int shmmni;
92 unsigned long int shmseg;
93 unsigned long int shmall;
94 unsigned long int __glibc_reserved1;
95 unsigned long int __glibc_reserved2;
96 unsigned long int __glibc_reserved3;
97 unsigned long int __glibc_reserved4;
100 struct shm_info
102 int used_ids;
103 unsigned long int shm_tot; /* total allocated shm */
104 unsigned long int shm_rss; /* total resident shm */
105 unsigned long int shm_swp; /* total swapped shm */
106 unsigned long int swap_attempts;
107 unsigned long int swap_successes;
110 #endif /* __USE_MISC */
112 __END_DECLS