| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame^] | 1 | /* Provide kernel hint to read ahead. |
| 2 | Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the 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 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, write to the Free |
| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 18 | 02111-1307 USA. */ |
| 19 | |
| 20 | #include <errno.h> |
| 21 | #include <fcntl.h> |
| 22 | #include <sys/types.h> |
| 23 | #include <sys/syscall.h> |
| 24 | |
| 25 | #ifdef __UCLIBC_HAS_LFS__ |
| 26 | #include <_lfs_64.h> |
| 27 | # ifdef __NR_readahead |
| 28 | |
| 29 | ssize_t readahead(int fd, off64_t offset, size_t count) |
| 30 | { |
| 31 | # if _MIPS_SIM == _ABIO32 |
| 32 | return INLINE_SYSCALL (readahead, 5, fd, 0, |
| 33 | __LONG_LONG_PAIR ((off_t) (offset >> 32), (off_t) offset), |
| 34 | count); |
| 35 | # else /* N32 || N64 */ |
| 36 | return INLINE_SYSCALL (readahead, 3, fd, offset, count); |
| 37 | # endif |
| 38 | } |
| 39 | |
| 40 | # endif |
| 41 | #endif |