/* Copyright (C) 1995, 1997, 1998 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995. 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. */ #include <stdlib.h> #include <errno.h> #include <sys/shm.h> #include <syscall.h> #include "ipc.h" #ifdef L_shmat /* Attach the shared memory segment associated with SHMID to the data segment of the calling process. SHMADDR and SHMFLG determine how and where the segment is attached. */ #if defined (__alpha__) #define __NR_shmat __NR_osf_shmat #endif #ifdef __NR_shmat _syscall3(void *, shmat, int, shmid, const void *,shmaddr, int, shmflg); #else void * shmat (int shmid, const void *shmaddr, int shmflg) { int retval; unsigned long raddr; retval = __syscall_ipc(IPCOP_shmat, shmid, shmflg, (int) &raddr, (void *) shmaddr); return ((unsigned long int) retval > -(unsigned long int) SHMLBA ? (void *) retval : (void *) raddr); } #endif #endif #ifdef L_shmctl /* Provide operations to control over shared memory segments. */ #ifdef __NR_shmctl _syscall3(int, shmctl, int, shmid, int, cmd, struct shmid_ds *, buf); #else int shmctl (int shmid, int cmd, struct shmid_ds *buf) { return __syscall_ipc(IPCOP_shmctl, shmid, cmd, 0, buf); } #endif #endif #ifdef L_shmdt /* Detach shared memory segment starting at address specified by SHMADDR from the caller's data segment. */ #ifdef __NR_shmdt _syscall1(int, shmdt, const void *, shmaddr); #else int shmdt (const void *shmaddr) { return __syscall_ipc(IPCOP_shmdt, 0, 0, 0, (void *) shmaddr); } #endif #endif #ifdef L_shmget /* Return an identifier for an shared memory segment of at least size SIZE which is associated with KEY. */ #ifdef __NR_shmget _syscall3(int, shmget, key_t, key, size_t, size, int, shmflg); #else int shmget (key_t key, size_t size, int shmflg) { return __syscall_ipc(IPCOP_shmget, key, size, shmflg, NULL); } #endif #endif