79 lines
2.9 KiB
C++
79 lines
2.9 KiB
C++
/*
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Copyright <2018-2022> <scott.e.graves@protonmail.com>
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Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
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associated documentation files (the "Software"), to deal in the Software without restriction,
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including without limitation the rights to use, copy, modify, merge, publish, distribute,
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sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all copies or
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substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
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NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
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OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef INCLUDE_DOWNLOAD_BUFFERED_READER_HPP_
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#define INCLUDE_DOWNLOAD_BUFFERED_READER_HPP_
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#include "common.hpp"
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#include "types/repertory.hpp"
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namespace repertory {
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class app_config;
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class buffered_reader final {
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public:
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buffered_reader(const app_config &config, const filesystem_item &fsi,
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const api_reader_callback &api_reader, const std::size_t &chunk_size,
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const std::size_t &total_chunks, const std::size_t &start_chunk);
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~buffered_reader();
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private:
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const filesystem_item &fsi_;
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const api_reader_callback &api_reader_;
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const std::size_t chunk_size_;
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const std::size_t total_chunks_;
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boost::dynamic_bitset<> ring_state_;
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api_error error_ = api_error::success;
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std::unique_ptr<std::vector<char>> first_chunk_data_;
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std::unique_ptr<std::vector<char>> last_chunk_data_;
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std::size_t read_chunk_index_ = 0u;
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std::mutex read_mutex_;
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std::condition_variable read_notify_;
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std::size_t read_offset_ = 0u;
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bool reset_reader_ = false;
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std::vector<std::vector<char>> ring_data_;
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std::unique_ptr<std::thread> reader_thread_;
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bool stop_requested_ = false;
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std::mutex write_mutex_;
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std::size_t write_chunk_index_ = 0u;
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private:
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bool is_active() const { return not stop_requested_ && (error_ == api_error::success); }
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void reader_thread();
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public:
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std::size_t get_chunk_size() const { return chunk_size_; }
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void get_first_chunk(std::vector<char> *&data) { data = first_chunk_data_.get(); }
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void get_last_chunk(std::vector<char> *&data) { data = last_chunk_data_.get(); }
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bool has_first_chunk() const { return static_cast<bool>(first_chunk_data_); }
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bool has_last_chunk() const { return static_cast<bool>(last_chunk_data_); }
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void notify_stop_requested();
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api_error read_chunk(const std::size_t &chunk_index, std::vector<char> &data);
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};
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} // namespace repertory
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#endif // INCLUDE_DOWNLOAD_BUFFERED_READER_HPP_
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