tomFlowee
bb7275466b
This ports the io-service to the source compatible io-context class, with the most work going to the WorkerThreads which owns that one.
77 lines
2.6 KiB
C++
77 lines
2.6 KiB
C++
/*
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* This file is part of the Flowee project
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* Copyright (C) 2018-2025 Tom Zander <tom@flowee.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef FLOWEE_WORKERTHREADS_H
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#define FLOWEE_WORKERTHREADS_H
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#include <boost/asio/io_context.hpp>
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#include <boost/asio/executor_work_guard.hpp>
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#include <boost/thread.hpp>
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/**
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* This is a class that spawns a series of threads where jobs can be run on.
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* The WorkerThreads class starts a list of threads based on the amount of
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* cores detected on the hardware, each thread will then be run to become an
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* event-queue based on the boost asio primitives.
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*
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* Notice that the threads catch exceptions and continue the next event
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* in the event-queue after logging a generic message.
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*/
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class WorkerThreads
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{
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public:
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/**
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* Create all threads and start them.
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* @param threadCount the number of threads to start, or -1 to use the hardware concurrency amount.
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*/
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WorkerThreads(int threadCount = -1);
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~WorkerThreads();
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/// request a peaceful shutdown of the threads. (thread-safe)
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void stopThreads();
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/// blocking wait until all threads finished.
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void joinAll();
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/// Return a ref to the ioContext owned by this WorkerThreads.
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boost::asio::io_context& ioContext() const;
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/**
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* Wrapper function that allows users to create a thread on our thread-group.
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*/
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template<typename F>
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boost::thread* createNewThread(F threadfunc) {
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return m_threads.create_thread(threadfunc);
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}
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protected:
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/// only called from constructor. Useful in unit tests.
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void startThreads(int threadCount = -1);
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private:
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std::shared_ptr<boost::asio::io_context> m_context;
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// work around weird template shit from boost that makes it impossible to reuse
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// the same stack defined item multiple times.
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struct Work {
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Work(const std::shared_ptr<boost::asio::io_context> &context);
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boost::asio::executor_work_guard<boost::asio::io_context::executor_type> work;
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};
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std::unique_ptr<Work> m_work;
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boost::thread_group m_threads;
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};
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#endif
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