1 | /* Copyright (C) 2003-2017 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <errno.h> |
19 | #include <fcntl.h> |
20 | #include <sysdep.h> |
21 | |
22 | /* Advice the system about the expected behaviour of the application with |
23 | respect to the file associated with FD. */ |
24 | |
25 | #ifndef __OFF_T_MATCHES_OFF64_T |
26 | |
27 | /* Both arm and powerpc implements fadvise64_64 with last 'advise' argument |
28 | just after 'fd' to avoid the requirement of implementing 7-arg syscalls. |
29 | ARM also defines __NR_fadvise64_64 as __NR_arm_fadvise64_64. |
30 | |
31 | tile requires __ASSUME_ALIGNED_REGISTER_PAIRS but implements the 32-bit |
32 | fadvise64_64 without the padding 0 after fd. |
33 | |
34 | s390 implements fadvice64_64 using a specific struct with arguments |
35 | packed inside. This is the only implementation handled in arch-specific |
36 | code. */ |
37 | |
38 | int |
39 | posix_fadvise (int fd, off_t offset, off_t len, int advise) |
40 | { |
41 | INTERNAL_SYSCALL_DECL (err); |
42 | # ifdef __NR_fadvise64 |
43 | int ret = INTERNAL_SYSCALL_CALL (fadvise64, err, fd, |
44 | __ALIGNMENT_ARG SYSCALL_LL (offset), |
45 | len, advise); |
46 | # else |
47 | # ifdef __ASSUME_FADVISE64_64_6ARG |
48 | int ret = INTERNAL_SYSCALL_CALL (fadvise64_64, err, fd, advise, |
49 | __ALIGNMENT_ARG SYSCALL_LL (offset), |
50 | SYSCALL_LL (len)); |
51 | # else |
52 | |
53 | # ifdef __ASSUME_FADVISE64_64_NO_ALIGN |
54 | # undef __ALIGNMENT_ARG |
55 | # define __ALIGNMENT_ARG |
56 | # endif |
57 | |
58 | int ret = INTERNAL_SYSCALL_CALL (fadvise64_64, err, fd, |
59 | __ALIGNMENT_ARG SYSCALL_LL (offset), |
60 | SYSCALL_LL (len), advise); |
61 | # endif |
62 | # endif |
63 | if (INTERNAL_SYSCALL_ERROR_P (ret, err)) |
64 | return INTERNAL_SYSCALL_ERRNO (ret, err); |
65 | return 0; |
66 | } |
67 | #endif /* __OFF_T_MATCHES_OFF64_T */ |
68 | |