1 /* Copyright (C) 1995, 1996, 1997, 2000, 2002, 2004
2 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
20 # error "Never include <bits/shm.h> directly; use <sys/shm.h> instead."
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) */
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. */
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() */
55 unsigned long int __unused1;
57 __time_t shm_dtime; /* time of last shmdt() */
59 unsigned long int __unused2;
61 __time_t shm_ctime; /* time of last change by shmctl() */
63 unsigned long int __unused3;
65 __pid_t shm_cpid; /* pid of creator */
66 __pid_t shm_lpid; /* pid of last shmop */
67 shmatt_t shm_nattch; /* number of current attaches */
68 unsigned long int __unused4;
69 unsigned long int __unused5;
74 /* ipcs ctl commands */
78 /* shm_mode upper byte flags */
79 # define SHM_DEST 01000 /* segment will be destroyed on last detach */
80 # define SHM_LOCKED 02000 /* segment will not be swapped */
81 # define SHM_HUGETLB 04000 /* segment is mapped via hugetlb */
82 # define SHM_NORESERVE 010000 /* don't check for reservations */
86 unsigned long int shmmax;
87 unsigned long int shmmin;
88 unsigned long int shmmni;
89 unsigned long int shmseg;
90 unsigned long int shmall;
91 unsigned long int __unused1;
92 unsigned long int __unused2;
93 unsigned long int __unused3;
94 unsigned long int __unused4;
100 unsigned long int shm_tot; /* total allocated shm */
101 unsigned long int shm_rss; /* total resident shm */
102 unsigned long int shm_swp; /* total swapped shm */
103 unsigned long int swap_attempts;
104 unsigned long int swap_successes;
107 #endif /* __USE_MISC */