]>
Commit | Line | Data |
---|---|---|
9bd64602 | 1 | /* Provide kernel hint to read ahead. |
ad3371fb | 2 | Copyright (C) 2002, 2003, 2004, 2007 Free Software Foundation, Inc. |
9bd64602 UD |
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 | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
9bd64602 UD |
18 | |
19 | #include <errno.h> | |
a658675d | 20 | #include <fcntl.h> |
9bd64602 UD |
21 | #include <sys/types.h> |
22 | ||
23 | #include <sysdep.h> | |
24 | #include <sys/syscall.h> | |
25 | ||
26 | ||
27 | #ifdef __NR_readahead | |
28 | ||
9bd64602 | 29 | ssize_t |
a658675d | 30 | __readahead (int fd, off64_t offset, size_t count) |
9bd64602 | 31 | { |
ad3371fb UD |
32 | return INLINE_SYSCALL (readahead, 4, fd, |
33 | __LONG_LONG_PAIR ((off_t) (offset >> 32), | |
34 | (off_t) (offset & 0xffffffff)), | |
35 | count); | |
9bd64602 UD |
36 | } |
37 | #else | |
38 | ssize_t | |
a658675d | 39 | __readahead (int fd, off64_t offset, size_t count) |
9bd64602 UD |
40 | { |
41 | __set_errno (ENOSYS); | |
42 | return -1; | |
43 | } | |
44 | stub_warning (readahead) | |
9bd64602 UD |
45 | #endif |
46 | ||
47 | weak_alias (__readahead, readahead) |