104 lines
3.1 KiB
C++
104 lines
3.1 KiB
C++
/*
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Copyright (c) 2006, Arvid Norberg
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TORRENT_FILE_POOL_HPP
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#define TORRENT_FILE_POOL_HPP
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#ifdef _MSC_VER
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#pragma warning(push, 1)
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#endif
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#include <boost/filesystem/path.hpp>
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#include <boost/multi_index_container.hpp>
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#include <boost/multi_index/member.hpp>
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#include <boost/multi_index/ordered_index.hpp>
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#include <boost/shared_ptr.hpp>
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#include <boost/thread.hpp>
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#ifdef _MSC_VER
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#pragma warning(pop)
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#endif
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#include "libtorrent/file.hpp"
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#include "libtorrent/time.hpp"
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namespace libtorrent
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{
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using boost::multi_index::multi_index_container;
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using boost::multi_index::ordered_non_unique;
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using boost::multi_index::ordered_unique;
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using boost::multi_index::indexed_by;
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using boost::multi_index::member;
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namespace fs = boost::filesystem;
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struct TORRENT_EXPORT file_pool : boost::noncopyable
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{
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file_pool(int size = 40): m_size(size) {}
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boost::shared_ptr<file> open_file(void* st, fs::path const& p
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, file::open_mode m, std::string& error);
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void release(void* st);
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void release(fs::path const& p);
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void resize(int size);
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private:
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int m_size;
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struct lru_file_entry
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{
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lru_file_entry(): last_use(time_now()) {}
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mutable boost::shared_ptr<file> file_ptr;
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fs::path file_path;
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void* key;
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ptime last_use;
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file::open_mode mode;
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};
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typedef multi_index_container<
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lru_file_entry, indexed_by<
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ordered_unique<member<lru_file_entry, fs::path
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, &lru_file_entry::file_path> >
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, ordered_non_unique<member<lru_file_entry, ptime
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, &lru_file_entry::last_use> >
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, ordered_non_unique<member<lru_file_entry, void*
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, &lru_file_entry::key> >
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>
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> file_set;
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file_set m_files;
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boost::mutex m_mutex;
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};
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}
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#endif
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