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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,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* SHMLBA uses it */
#define __getpagesize __getpagesize_internal
#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
#define __NR___libc_shmctl __NR_shmctl
static inline _syscall3(int, __libc_shmctl, int, shmid, int, cmd, struct shmid_ds *, buf);
#endif
int shmctl(int shmid, int cmd, struct shmid_ds *buf)
{
#ifdef __NR_shmctl
return __libc_shmctl(shmid, cmd | __IPC_64, buf);
#else
return __syscall_ipc(IPCOP_shmctl, shmid, cmd | __IPC_64, 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
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