forked from bartvdbraak/blender
986267300b
Deleting the old internal audaspace. Major changes from there are: - The whole library was refactored to use C++11. - Many stability and performance improvements. - Major Python API refactor: - Most requested: Play self generated sounds using numpy arrays. - For games: Sound list, random sounds and dynamic music. - Writing sounds to files. - Sequencing API. - Opening sound devices, eg. Jack. - Ability to choose different OpenAL devices in the user settings.
120 lines
2.7 KiB
C++
120 lines
2.7 KiB
C++
/*******************************************************************************
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* Copyright 2015-2016 Juan Francisco Crespo Galán
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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******************************************************************************/
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#pragma once
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/**
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* @file ThreadPool.h
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* @ingroup util
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* The ThreadPool class.
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*/
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#include "Audaspace.h"
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#include <mutex>
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#include <condition_variable>
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#include <vector>
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#include <thread>
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#include <queue>
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#include <future>
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#include <functional>
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AUD_NAMESPACE_BEGIN
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/**
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* This represents pool of threads.
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*/
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class AUD_API ThreadPool
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{
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private:
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/**
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* A queue of tasks.
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*/
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std::queue<std::function<void()>> m_queue;
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/**
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* A vector of thread objects.
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*/
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std::vector<std::thread> m_threads;
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/**
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* A mutex for synchronization.
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*/
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std::mutex m_mutex;
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/**
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* A condition variable used to stop the threads when there are no tasks.
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*/
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std::condition_variable m_condition;
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/**
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* Stop flag.
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*/
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bool m_stopFlag;
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/**
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* The number fo threads.
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*/
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unsigned int m_numThreads;
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// delete copy constructor and operator=
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ThreadPool(const ThreadPool&) = delete;
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ThreadPool& operator=(const ThreadPool&) = delete;
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public:
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/**
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* Creates a new ThreadPool object.
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* \param count The number of threads of the pool. It must not be 0.
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*/
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ThreadPool(unsigned int count);
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virtual ~ThreadPool();
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/**
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* Enqueues a new task for the threads to realize.
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* \param t A function that realices a task.
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* \param args The arguments of the task.
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* \return A future of the same type as the return type of the task.
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*/
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template<class T, class... Args>
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std::future<typename std::result_of<T(Args...)>::type> enqueue(T&& t, Args&&... args)
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{
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using pkgdTask = std::packaged_task<typename std::result_of<T(Args...)>::type()>;
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std::shared_ptr<pkgdTask> task = std::make_shared<pkgdTask>(std::bind(std::forward<T>(t), std::forward<Args>(args)...));
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auto result = task->get_future();
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m_mutex.lock();
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m_queue.emplace([task]() { (*task)(); });
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m_mutex.unlock();
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m_condition.notify_one();
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return result;
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}
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/**
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* Retrieves the number of threads of the pool.
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* \return The number of threads.
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*/
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unsigned int getNumOfThreads();
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private:
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/**
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* Worker thread function.
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*/
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void threadFunction();
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};
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AUD_NAMESPACE_END
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