ThreadPool.hpp

Go to the documentation of this file.

/*
** EPITECH PROJECT, 2025
** R-Type
** File description:
** ThreadPool.hpp, ThreadPool class declaration
*/
 
/*
** MIT License
**
** Copyright (c) 2025 Robin Toillon
**
** Permission is hereby granted, free of charge, to any person obtaining
** a copy of this software and associated documentation files (the
** "Software"), to deal in the Software without restriction, including
** without limitation the rights to use, copy, modify, merge, publish,
** distribute, sublicense, and/or sell copies of the Software, and to
** permit persons to whom the Software is furnished to do so, subject to
** the following conditions:
**
** The above copyright notice and this permission notice shall be
** included in all copies or substantial portions of the Software.
**
** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
** SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
 
#ifndef RTYPE_THREADPOOL_HPP_
    #define RTYPE_THREADPOOL_HPP_
 
    #include "RType/Error.hpp"
    
    #include <concepts>
    #include <condition_variable>
    #include <expected>
    #include <functional>
    #include <memory>
    #include <future>
    #include <mutex>
    #include <queue>
    #include <thread>
    #include <vector>
    #include <functional>
 
namespace rtp::thread
{
    class ThreadPool final {
        public:
            ThreadPool(const ThreadPool &) = delete;
            ThreadPool &operator=(const ThreadPool &) = delete;
 
            [[nodiscard]]
            static auto create(size_t numThreads)
                -> std::expected<std::unique_ptr<ThreadPool>, rtp::Error>;
 
            ~ThreadPool() noexcept;
 
            template<std::invocable F, typename... Args>
            [[nodiscard]]
            auto enqueue(F &&f, Args &&...args)
                -> std::expected<std::future<std::invoke_result_t<F, Args...>>,
                                 rtp::Error>;
 
        private:
            std::vector<std::jthread> _workers; 
            std::queue<std::move_only_function<void(void)>> _tasks;
            std::mutex _queueMutex; 
            std::condition_variable _condition; 
            bool _stop{false}; 
        private:
            ThreadPool(void) noexcept = default;
 
            void start(size_t numThreads);
 
            void workerThread(std::stop_token stopToken) noexcept;
 
    };
}
 
    #include "ThreadPool.tpp" /* Enqueue method implementation */
 
#endif /* !RTYPE_THREADPOOL_HPP_ */