/* Copyright (C) 1995, 1996, 1997 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 Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef _SYS_SHM_H # error "Never include <bits/shm.h> directly; use <sys/shm.h> instead." #endif #include <sys/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) */ /* Data structure describing a set of semaphores. */ struct shmid_ds { struct ipc_perm sem_perm; /* operation permission struct */ int shm_segsz; /* size of segment in bytes */ __time_t sem_atime; /* time of last shmat() */ __time_t sem_dtime; /* time of last shmdt() */ __time_t sem_ctime; /* time of last change by shmctl() */ __pid_t shm_cpid; /* pid of creator */ __pid_t shm_lpid; /* pid of last shmop */ unsigned short int shm_nattch; /* number of current attaches */ };