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git.ipfire.org Git - thirdparty/glibc.git/blob - sysdeps/unix/sysv/linux/posix_fadvise.c
1 /* Copyright (C) 2003-2016 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
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/>. */
22 /* Advice the system about the expected behaviour of the application with
23 respect to the file associated with FD. */
25 #ifndef __OFF_T_MATCHES_OFF64_T
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.
31 tile requires __ASSUME_ALIGNED_REGISTER_PAIRS but implements the 32-bit
32 fadvise64_64 without the padding 0 after fd.
34 s390 implements fadvice64_64 using a specific struct with arguments
35 packed inside. This is the only implementation handled in arch-specific
39 posix_fadvise (int fd
, off_t offset
, off_t len
, int advise
)
41 INTERNAL_SYSCALL_DECL (err
);
42 # ifdef __NR_fadvise64
43 int ret
= INTERNAL_SYSCALL_CALL (fadvise64
, err
, fd
,
44 __ALIGNMENT_ARG
SYSCALL_LL (offset
),
47 # ifdef __ASSUME_FADVISE64_64_6ARG
48 int ret
= INTERNAL_SYSCALL_CALL (fadvise64_64
, err
, fd
, advise
,
49 __ALIGNMENT_ARG
SYSCALL_LL (offset
),
53 # ifdef __ASSUME_FADVISE64_64_NO_ALIGN
54 # undef __ALIGNMENT_ARG
55 # define __ALIGNMENT_ARG
58 int ret
= INTERNAL_SYSCALL_CALL (fadvise64_64
, err
, fd
,
59 __ALIGNMENT_ARG
SYSCALL_LL (offset
),
60 SYSCALL_LL (len
), advise
);
63 if (INTERNAL_SYSCALL_ERROR_P (ret
, err
))
64 return INTERNAL_SYSCALL_ERRNO (ret
, err
);
67 #endif /* __OFF_T_MATCHES_OFF64_T */