mirror of
https://github.com/trapexit/mergerfs.git
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76 lines
2.0 KiB
C++
76 lines
2.0 KiB
C++
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/*
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ISC License
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Copyright (c) 2023, 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 "fuse_readdir_factory.hpp"
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#include "fuse_readdir_cor.hpp"
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#include "fuse_readdir_cosr.hpp"
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#include "fuse_readdir_seq.hpp"
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#include <cassert>
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#include <cmath>
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#include <cstdio>
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#include <cstdlib>
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namespace l
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{
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static
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void
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read_cfg(std::string const cfgstr_,
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std::string &type_,
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int &concurrency_)
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{
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char type[16];
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int concurrency;
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concurrency = 0;
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std::sscanf(cfgstr_.c_str(),"%15[a-z]:%u",type,&concurrency);
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if(concurrency == 0)
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concurrency = std::thread::hardware_concurrency();
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else if(concurrency < 0)
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concurrency = (std::thread::hardware_concurrency() / std::abs(concurrency));
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if(concurrency == 0)
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concurrency = 1;
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type_ = type;
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concurrency_ = concurrency;
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}
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}
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std::shared_ptr<FUSE::ReadDirBase>
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FUSE::ReadDirFactory::make(std::string const cfgstr_)
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{
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int concurrency;
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std::string type;
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l::read_cfg(cfgstr_,type,concurrency);
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assert(concurrency);
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if(type == "seq")
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return std::make_shared<FUSE::ReadDirSeq>();
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if(type == "cosr")
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return std::make_shared<FUSE::ReadDirCOSR>(concurrency);
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if(type == "cor")
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return std::make_shared<FUSE::ReadDirCOR>(concurrency);
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return {};
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}
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