88 lines
2.9 KiB
C++
88 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_READER_POOL_HPP_
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#define INCLUDE_DOWNLOAD_READER_POOL_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 reader_pool final {
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public:
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typedef std::function<void(api_error error)> completed_callback;
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private:
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struct pool_work_item {
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pool_work_item(std::string api_path, const std::size_t &read_size,
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const std::uint64_t &read_offset, std::vector<char> &data,
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completed_callback completed)
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: api_path(std::move(api_path)), read_size(read_size), read_offset(read_offset), data(data),
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completed(completed) {}
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std::string api_path;
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std::size_t read_size;
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std::uint64_t read_offset;
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std::vector<char> &data;
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completed_callback completed;
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};
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public:
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reader_pool(const std::size_t &pool_size, const api_reader_callback &api_reader)
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: pool_size_(pool_size), api_reader_(api_reader) {
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start();
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}
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~reader_pool() { stop(); }
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private:
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const std::size_t pool_size_;
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const api_reader_callback &api_reader_;
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bool paused_ = false;
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bool restart_active_ = false;
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bool stop_requested_ = false;
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std::mutex work_mutex_;
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std::condition_variable work_notify_;
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std::deque<std::shared_ptr<pool_work_item>> work_queue_;
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std::vector<std::thread> work_threads_;
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std::uint16_t active_count_ = 0u;
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private:
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void process_work_item(pool_work_item &work);
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void start();
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void stop();
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void wait_for_resume(unique_mutex_lock &lock);
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public:
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void pause();
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void queue_read_bytes(const std::string &api_path, const std::size_t &read_size,
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const std::uint64_t &read_offset, std::vector<char> &data,
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completed_callback completed);
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void restart();
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void resume();
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};
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} // namespace repertory
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#endif // INCLUDE_DOWNLOAD_READER_POOL_HPP_
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