| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 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. |
| 4 | |
| 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. |
| 9 | |
| 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. |
| 14 | |
| 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. */ |
| 19 | |
| 20 | /* SHMLBA uses it on most of the archs (not mips) */ |
| 21 | #define __getpagesize getpagesize |
| 22 | |
| 23 | #include <stdlib.h> |
| 24 | #include <errno.h> |
| 25 | #include <sys/shm.h> |
| 26 | #include <syscall.h> |
| 27 | #include "ipc.h" |
| 28 | |
| 29 | #ifdef L_shmat |
| 30 | /* Attach the shared memory segment associated with SHMID to the data |
| 31 | segment of the calling process. SHMADDR and SHMFLG determine how |
| 32 | and where the segment is attached. */ |
| 33 | #if defined(__NR_osf_shmat) |
| 34 | # define __NR_shmat __NR_osf_shmat |
| 35 | #endif |
| 36 | #ifdef __NR_shmat |
| 37 | _syscall3(void *, shmat, int, shmid, const void *,shmaddr, int, shmflg) |
| 38 | #else |
| 39 | /* psm: don't remove this, else mips will fail */ |
| 40 | #include <unistd.h> |
| 41 | |
| 42 | void * shmat (int shmid, const void *shmaddr, int shmflg) |
| 43 | { |
| 44 | int retval; |
| 45 | unsigned long raddr; |
| 46 | |
| 47 | retval = __syscall_ipc(IPCOP_shmat, shmid, shmflg, (int) &raddr, (void *) shmaddr, 0); |
| 48 | return ((unsigned long int) retval > -(unsigned long int) SHMLBA |
| 49 | ? (void *) retval : (void *) raddr); |
| 50 | } |
| 51 | #endif |
| 52 | #endif |
| 53 | |
| 54 | #ifdef L_shmctl |
| 55 | /* Provide operations to control over shared memory segments. */ |
| 56 | #ifdef __NR_shmctl |
| 57 | #define __NR___libc_shmctl __NR_shmctl |
| 58 | static __inline__ _syscall3(int, __libc_shmctl, int, shmid, int, cmd, struct shmid_ds *, buf) |
| 59 | #endif |
| 60 | int shmctl(int shmid, int cmd, struct shmid_ds *buf) |
| 61 | { |
| 62 | #ifdef __NR_shmctl |
| 63 | return __libc_shmctl(shmid, cmd | __IPC_64, buf); |
| 64 | #else |
| 65 | return __syscall_ipc(IPCOP_shmctl, shmid, cmd | __IPC_64, 0, buf, 0); |
| 66 | #endif |
| 67 | } |
| 68 | #endif |
| 69 | |
| 70 | |
| 71 | #ifdef L_shmdt |
| 72 | /* Detach shared memory segment starting at address specified by SHMADDR |
| 73 | from the caller's data segment. */ |
| 74 | #ifdef __NR_shmdt |
| 75 | _syscall1(int, shmdt, const void *, shmaddr) |
| 76 | #else |
| 77 | int shmdt (const void *shmaddr) |
| 78 | { |
| 79 | return __syscall_ipc(IPCOP_shmdt, 0, 0, 0, (void *) shmaddr, 0); |
| 80 | } |
| 81 | #endif |
| 82 | #endif |
| 83 | |
| 84 | #ifdef L_shmget |
| 85 | /* Return an identifier for an shared memory segment of at least size SIZE |
| 86 | which is associated with KEY. */ |
| 87 | #ifdef __NR_shmget |
| 88 | _syscall3(int, shmget, key_t, key, size_t, size, int, shmflg) |
| 89 | #else |
| 90 | int shmget (key_t key, size_t size, int shmflg) |
| 91 | { |
| 92 | return __syscall_ipc(IPCOP_shmget, key, size, shmflg, NULL, 0); |
| 93 | } |
| 94 | #endif |
| 95 | #endif |