1 /* Copyright (C) 1995, 1997, 1998 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
21 #define __getpagesize getpagesize
29 libc_hidden_proto(getpagesize)
32 /* Attach the shared memory segment associated with SHMID to the data
33 segment of the calling process. SHMADDR and SHMFLG determine how
34 and where the segment is attached. */
35 #if defined (__alpha__)
36 #define __NR_shmat __NR_osf_shmat
39 _syscall3(void *, shmat, int, shmid, const void *,shmaddr, int, shmflg);
41 void * shmat (int shmid, const void *shmaddr, int shmflg)
46 retval = __syscall_ipc(IPCOP_shmat, shmid, shmflg, (int) &raddr, (void *) shmaddr);
47 return ((unsigned long int) retval > -(unsigned long int) SHMLBA
48 ? (void *) retval : (void *) raddr);
54 /* Provide operations to control over shared memory segments. */
56 #define __NR___libc_shmctl __NR_shmctl
57 static inline _syscall3(int, __libc_shmctl, int, shmid, int, cmd, struct shmid_ds *, buf);
59 int shmctl(int shmid, int cmd, struct shmid_ds *buf)
62 return __libc_shmctl(shmid, cmd | __IPC_64, buf);
64 return __syscall_ipc(IPCOP_shmctl, shmid, cmd | __IPC_64, 0, buf);
71 /* Detach shared memory segment starting at address specified by SHMADDR
72 from the caller's data segment. */
74 _syscall1(int, shmdt, const void *, shmaddr);
76 int shmdt (const void *shmaddr)
78 return __syscall_ipc(IPCOP_shmdt, 0, 0, 0, (void *) shmaddr);
84 /* Return an identifier for an shared memory segment of at least size SIZE
85 which is associated with KEY. */
87 _syscall3(int, shmget, key_t, key, size_t, size, int, shmflg);
89 int shmget (key_t key, size_t size, int shmflg)
91 return __syscall_ipc(IPCOP_shmget, key, size, shmflg, NULL);