| /* Copyright (C) 1995-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _SYS_SHM_H |
| # error "Never include <bits/shm.h> directly; use <sys/shm.h> instead." |
| #endif |
| |
| #include <bits/types.h> |
| |
| /* Flags for `shmat'. */ |
| #define SHM_RDONLY 010000 /* attach read-only else read-write */ |
| #define SHM_RND 020000 /* round attach address to SHMLBA */ |
| #define SHM_REMAP 040000 /* take-over region on attach */ |
| |
| /* Commands for `shmctl'. */ |
| #define SHM_LOCK 11 /* lock segment (root only) */ |
| #define SHM_UNLOCK 12 /* unlock segment (root only) */ |
| |
| __BEGIN_DECLS |
| |
| /* Segment low boundary address multiple. */ |
| #define SHMLBA (__getpagesize ()) |
| extern int __getpagesize (void) __THROW __attribute__ ((__const__)); |
| |
| |
| /* Type to count number of attaches. */ |
| typedef unsigned short int shmatt_t; |
| |
| /* Data structure describing a shared memory segment. */ |
| struct shmid_ds |
| { |
| struct ipc_perm shm_perm; /* operation permission struct */ |
| int shm_segsz; /* size of segment in bytes */ |
| __time_t shm_atime; /* time of last shmat() */ |
| __time_t shm_dtime; /* time of last shmdt() */ |
| __time_t shm_ctime; /* time of last change by shmctl() */ |
| __pid_t shm_cpid; /* pid of creator */ |
| __pid_t shm_lpid; /* pid of last shmop */ |
| shmatt_t shm_nattch; /* number of current attaches */ |
| }; |
| |
| __END_DECLS |