mirror of https://github.com/trapexit/mergerfs.git
77 lines
2.0 KiB
C++
77 lines
2.0 KiB
C++
/*
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Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <fcntl.h>
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#if _XOPEN_SOURCE >= 600 || _POSIX_C_SOURCE >= 200112L
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#warning "using fs_fadvise_posix.icpp"
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#include "fs_fadvise_posix.icpp"
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#else
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#warning "using fs_fadvise_unsupported.icpp"
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#include "fs_fadvise_unsupported.icpp"
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#endif
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#ifndef POSIX_FADV_NORMAL
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# define POSIX_FADV_NORMAL 0
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#endif
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#ifndef POSIX_FADV_RANDOM
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# define POSIX_FADV_RANDOM 1
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#endif
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#ifndef POSIX_FADV_SEQUENTIAL
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# define POSIX_FADV_SEQUENTIAL 2
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#endif
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#ifndef POSIX_FADV_WILLNEED
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# define POSIX_FADV_WILLNEED 3
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#endif
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#ifndef POSIX_FADV_DONTNEED
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# define POSIX_FADV_DONTNEED 4
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#endif
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#ifndef POSIX_FADV_NOREUSE
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# define POSIX_FADV_NOREUSE 5
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#endif
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namespace fs
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{
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int
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fadvise_dontneed(const int fd_,
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const off_t offset_,
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const off_t len_)
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{
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return fs::fadvise(fd_,offset_,len_,POSIX_FADV_DONTNEED);
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}
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int
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fadvise_willneed(const int fd_,
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const off_t offset_,
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const off_t len_)
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{
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return fs::fadvise(fd_,offset_,len_,POSIX_FADV_WILLNEED);
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}
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int
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fadvise_sequential(const int fd_,
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const off_t offset_,
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const off_t len_)
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{
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return fs::fadvise(fd_,offset_,len_,POSIX_FADV_SEQUENTIAL);
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}
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}
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