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/* 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, see <http://www.gnu.org/licenses/>. */ /* SHMLBA uses it on most of the archs (not mips) */ #define __getpagesize getpagesize #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(__NR_osf_shmat) # define __NR_shmat __NR_osf_shmat #endif #ifdef __NR_shmat _syscall3(void *, shmat, int, shmid, const void *,shmaddr, int, shmflg) #else /* psm: don't remove this, else mips will fail */ #include <unistd.h> 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, 0); 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 #define __NR___syscall_shmctl __NR_shmctl static __always_inline _syscall3(int, __syscall_shmctl, int, shmid, int, cmd, struct shmid_ds *, buf) #endif int shmctl(int shmid, int cmd, struct shmid_ds *buf) { #ifdef __NR_shmctl return __syscall_shmctl(shmid, cmd | __IPC_64, buf); #else return __syscall_ipc(IPCOP_shmctl, shmid, cmd | __IPC_64, 0, buf, 0); #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, 0); } #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, 0); } #endif #endif |