* sysdeps/unix/sysv/linux/bits/sched.h: Make second parameter of
[glibc.git] / sysdeps / unix / sysv / linux / bits / shm.h
blob318d601aedbdd6955e1c7954bae6bbd5d967fd9b
1 /* Copyright (C) 1995,1996,1997,2000,2002,2004 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, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
19 #ifndef _SYS_SHM_H
20 # error "Never include <bits/shm.h> directly; use <sys/shm.h> instead."
21 #endif
23 #include <bits/types.h>
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> */
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 */
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 set of semaphores. */
49 struct shmid_ds
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 unsigned long int __unused1;
55 __time_t shm_dtime; /* time of last shmdt() */
56 unsigned long int __unused2;
57 __time_t shm_ctime; /* time of last change by shmctl() */
58 unsigned long int __unused3;
59 __pid_t shm_cpid; /* pid of creator */
60 __pid_t shm_lpid; /* pid of last shmop */
61 shmatt_t shm_nattch; /* number of current attaches */
62 unsigned long int __unused4;
63 unsigned long int __unused5;
66 #ifdef __USE_MISC
68 /* ipcs ctl commands */
69 # define SHM_STAT 13
70 # define SHM_INFO 14
72 /* shm_mode upper byte flags */
73 # define SHM_DEST 01000 /* segment will be destroyed on last detach */
74 # define SHM_LOCKED 02000 /* segment will not be swapped */
75 # define SHM_HUGETLB 04000 /* segment is mapped via hugetlb */
76 # define SHM_NORESERVE 010000 /* don't check for reservations */
78 struct shminfo
80 unsigned long int shmmax;
81 unsigned long int shmmin;
82 unsigned long int shmmni;
83 unsigned long int shmseg;
84 unsigned long int shmall;
85 unsigned long int __unused1;
86 unsigned long int __unused2;
87 unsigned long int __unused3;
88 unsigned long int __unused4;
91 struct shm_info
93 int used_ids;
94 unsigned long int shm_tot; /* total allocated shm */
95 unsigned long int shm_rss; /* total resident shm */
96 unsigned long int shm_swp; /* total swapped shm */
97 unsigned long int swap_attempts;
98 unsigned long int swap_successes;
101 #endif /* __USE_MISC */
103 __END_DECLS