68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
/* Copyright (C) 2003-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <fcntl.h>
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#include <sysdep.h>
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/* Advice the system about the expected behaviour of the application with
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respect to the file associated with FD. */
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#ifndef __OFF_T_MATCHES_OFF64_T
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/* Both arm and powerpc implements fadvise64_64 with last 'advise' argument
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just after 'fd' to avoid the requirement of implementing 7-arg syscalls.
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ARM also defines __NR_fadvise64_64 as __NR_arm_fadvise64_64.
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tile requires __ASSUME_ALIGNED_REGISTER_PAIRS but implements the 32-bit
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fadvise64_64 without the padding 0 after fd.
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s390 implements fadvice64_64 using a specific struct with arguments
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packed inside. This is the only implementation handled in arch-specific
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code. */
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int
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posix_fadvise (int fd, off_t offset, off_t len, int advise)
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{
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INTERNAL_SYSCALL_DECL (err);
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# ifdef __NR_fadvise64
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int ret = INTERNAL_SYSCALL_CALL (fadvise64, err, fd,
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__ALIGNMENT_ARG SYSCALL_LL (offset),
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len, advise);
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# else
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# ifdef __ASSUME_FADVISE64_64_6ARG
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int ret = INTERNAL_SYSCALL_CALL (fadvise64_64, err, fd, advise,
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__ALIGNMENT_ARG SYSCALL_LL (offset),
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SYSCALL_LL (len));
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# else
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# ifdef __ASSUME_FADVISE64_64_NO_ALIGN
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# undef __ALIGNMENT_ARG
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# define __ALIGNMENT_ARG
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# endif
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int ret = INTERNAL_SYSCALL_CALL (fadvise64_64, err, fd,
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__ALIGNMENT_ARG SYSCALL_LL (offset),
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SYSCALL_LL (len), advise);
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# endif
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# endif
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if (INTERNAL_SYSCALL_ERROR_P (ret, err))
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return INTERNAL_SYSCALL_ERRNO (ret, err);
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return 0;
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}
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#endif /* __OFF_T_MATCHES_OFF64_T */
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