projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 4a93ed42 CM |
1 | /* Copyright (C) 2011 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. | |
| 3 | Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. | |
| 4 | ||
| 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. | |
| 9 | ||
| 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. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Lesser General Public | |
| ab84e3ff PE |
16 | License along with the GNU C Library. If not, see |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| 4a93ed42 CM |
18 | |
| 19 | #ifndef _SYS_SHM_H | |
| 20 | # error "Never include <bits/shm.h> directly; use <sys/shm.h> instead." | |
| 21 | #endif | |
| 22 | ||
| 23 | #include <bits/types.h> | |
| 24 | #include <bits/wordsize.h> | |
| 25 | ||
| 26 | /* Permission flag for shmget. */ | |
| 27 | #define SHM_R 0400 /* or S_IRUGO from <linux/stat.h> */ | |
| 28 | #define SHM_W 0200 /* or S_IWUGO from <linux/stat.h> */ | |
| 29 | ||
| 30 | /* Flags for `shmat'. */ | |
| 31 | #define SHM_RDONLY 010000 /* attach read-only else read-write */ | |
| 32 | #define SHM_RND 020000 /* round attach address to SHMLBA */ | |
| 33 | #define SHM_REMAP 040000 /* take-over region on attach */ | |
| 34 | #define SHM_EXEC 0100000 /* execution access */ | |
| 35 | ||
| 36 | /* Commands for `shmctl'. */ | |
| 37 | #define SHM_LOCK 11 /* lock segment (root only) */ | |
| 38 | #define SHM_UNLOCK 12 /* unlock segment (root only) */ | |
| 39 | ||
| 40 | __BEGIN_DECLS | |
| 41 | ||
| 42 | /* Segment low boundary address multiple. */ | |
| 43 | #define SHMLBA (__getpagesize ()) | |
| 44 | extern int __getpagesize (void) __THROW __attribute__ ((__const__)); | |
| 45 | ||
| 46 | ||
| 47 | /* Type to count number of attaches. */ | |
| 48 | typedef unsigned long int shmatt_t; | |
| 49 | ||
| 50 | /* Data structure describing a shared memory segment. */ | |
| 51 | struct shmid_ds | |
| 52 | { | |
| 53 | struct ipc_perm shm_perm; /* operation permission struct */ | |
| 54 | size_t shm_segsz; /* size of segment in bytes */ | |
| 55 | __time_t shm_atime; /* time of last shmat() */ | |
| 56 | #if __WORDSIZE == 32 | |
| 57 | unsigned long int __unused1; | |
| 58 | #endif | |
| 59 | __time_t shm_dtime; /* time of last shmdt() */ | |
| 60 | #if __WORDSIZE == 32 | |
| 61 | unsigned long int __unused2; | |
| 62 | #endif | |
| 63 | __time_t shm_ctime; /* time of last change by shmctl() */ | |
| 64 | #if __WORDSIZE == 32 | |
| 65 | unsigned long int __unused3; | |
| 66 | #endif | |
| 67 | __pid_t shm_cpid; /* pid of creator */ | |
| 68 | __pid_t shm_lpid; /* pid of last shmop */ | |
| 69 | shmatt_t shm_nattch; /* number of current attaches */ | |
| 70 | unsigned long int __unused4; | |
| 71 | unsigned long int __unused5; | |
| 72 | }; | |
| 73 | ||
| 74 | #ifdef __USE_MISC | |
| 75 | ||
| 76 | /* ipcs ctl commands */ | |
| 77 | # define SHM_STAT 13 | |
| 78 | # define SHM_INFO 14 | |
| 79 | ||
| 80 | /* shm_mode upper byte flags */ | |
| 81 | # define SHM_DEST 01000 /* segment will be destroyed on last detach */ | |
| 82 | # define SHM_LOCKED 02000 /* segment will not be swapped */ | |
| 83 | # define SHM_HUGETLB 04000 /* segment is mapped via hugetlb */ | |
| 84 | # define SHM_NORESERVE 010000 /* don't check for reservations */ | |
| 85 | ||
| 86 | struct shminfo | |
| 87 | { | |
| 88 | unsigned long int shmmax; | |
| 89 | unsigned long int shmmin; | |
| 90 | unsigned long int shmmni; | |
| 91 | unsigned long int shmseg; | |
| 92 | unsigned long int shmall; | |
| 93 | unsigned long int __unused1; | |
| 94 | unsigned long int __unused2; | |
| 95 | unsigned long int __unused3; | |
| 96 | unsigned long int __unused4; | |
| 97 | }; | |
| 98 | ||
| 99 | struct shm_info | |
| 100 | { | |
| 101 | int used_ids; | |
| 102 | unsigned long int shm_tot; /* total allocated shm */ | |
| 103 | unsigned long int shm_rss; /* total resident shm */ | |
| 104 | unsigned long int shm_swp; /* total swapped shm */ | |
| 105 | unsigned long int swap_attempts; | |
| 106 | unsigned long int swap_successes; | |
| 107 | }; | |
| 108 | ||
| 109 | #endif /* __USE_MISC */ | |
| 110 | ||
| 111 | __END_DECLS |