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/* Copyright (C) 1995-2012 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> /* Permission flag for shmget. */ #define SHM_R 0400 /* or S_IRUGO from <linux/stat.h> */ #define SHM_W 0200 /* or S_IWUGO from <linux/stat.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 */ #define SHM_EXEC 0100000 /* execution access */ /* 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 __syscall_ulong_t shmatt_t; /* Data structure describing a shared memory segment. */ struct shmid_ds { struct ipc_perm shm_perm; /* operation permission struct */ size_t shm_segsz; /* size of segment in bytes */ __time_t shm_atime; /* time of last shmat() */ #ifndef __x86_64__ unsigned long int __unused1; #endif __time_t shm_dtime; /* time of last shmdt() */ #ifndef __x86_64__ unsigned long int __unused2; #endif __time_t shm_ctime; /* time of last change by shmctl() */ #ifndef __x86_64__ unsigned long int __unused3; #endif __pid_t shm_cpid; /* pid of creator */ __pid_t shm_lpid; /* pid of last shmop */ shmatt_t shm_nattch; /* number of current attaches */ __syscall_ulong_t __unused4; __syscall_ulong_t __unused5; }; #ifdef __USE_MISC /* ipcs ctl commands */ # define SHM_STAT 13 # define SHM_INFO 14 # define SHM_STAT_ANY 15 /* shm_mode upper byte flags */ # define SHM_DEST 01000 /* segment will be destroyed on last detach */ # define SHM_LOCKED 02000 /* segment will not be swapped */ # define SHM_HUGETLB 04000 /* segment is mapped via hugetlb */ # define SHM_NORESERVE 010000 /* don't check for reservations */ struct shminfo { __syscall_ulong_t shmmax; __syscall_ulong_t shmmin; __syscall_ulong_t shmmni; __syscall_ulong_t shmseg; __syscall_ulong_t shmall; __syscall_ulong_t __unused1; __syscall_ulong_t __unused2; __syscall_ulong_t __unused3; __syscall_ulong_t __unused4; }; struct shm_info { int used_ids; __syscall_ulong_t shm_tot; /* total allocated shm */ __syscall_ulong_t shm_rss; /* total resident shm */ __syscall_ulong_t shm_swp; /* total swapped shm */ __syscall_ulong_t swap_attempts; __syscall_ulong_t swap_successes; }; #endif /* __USE_MISC */ __END_DECLS