vladislavbelov
ffc4a56b9f
Fixes #6846 Differential Revision: https://code.wildfiregames.com/D5185 This was SVN commit r27965.
85 lines
2.0 KiB
C++
85 lines
2.0 KiB
C++
/* Copyright (C) 2022 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. 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 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. 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 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef INCLUDED_THREADING_TASKMANAGER
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#define INCLUDED_THREADING_TASKMANAGER
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#include "ps/Future.h"
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#include <memory>
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#include <vector>
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namespace Threading
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{
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enum class TaskPriority
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{
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NORMAL,
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LOW
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};
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/**
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* The task manager creates all worker threads on initialisation,
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* and manages the task queues.
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* See implementation for additional comments.
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*/
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class TaskManager
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{
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friend class WorkerThread;
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public:
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TaskManager();
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~TaskManager();
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TaskManager(const TaskManager&) = delete;
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TaskManager(TaskManager&&) = delete;
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TaskManager& operator=(const TaskManager&) = delete;
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TaskManager& operator=(TaskManager&&) = delete;
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static void Initialise();
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static TaskManager& Instance();
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/**
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* Clears all tasks from the queue. This blocks on started tasks.
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*/
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void ClearQueue();
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/**
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* @return the number of threaded workers.
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*/
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size_t GetNumberOfWorkers() const;
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/**
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* Push a task to be executed.
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*/
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template<typename T>
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Future<std::invoke_result_t<T>> PushTask(T&& func, TaskPriority priority = TaskPriority::NORMAL)
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{
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Future<std::invoke_result_t<T>> ret;
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DoPushTask(ret.Wrap(std::move(func)), priority);
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return ret;
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}
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private:
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TaskManager(size_t numberOfWorkers);
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void DoPushTask(std::function<void()>&& task, TaskPriority priority);
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class Impl;
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const std::unique_ptr<Impl> m;
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};
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} // namespace Threading
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#endif // INCLUDED_THREADING_TASKMANAGER
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