71 lines
1.8 KiB
C++
71 lines
1.8 KiB
C++
/* Copyright 2018 Dirk Steinke
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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// #ifndef TASK_POOL_H
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// #define TASK_POOL_H
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#include <condition_variable>
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#include <functional>
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#include <future>
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#include <memory>
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#include <mutex>
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#include <queue>
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#include <thread>
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#include <vector>
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/* class TaskPool {
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public:
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TaskPool();
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~TaskPool();
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template<class F, class... Args>
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auto addTask(F&& f, Args&&... args)
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-> std::future<typename std::result_of<F(Args...)>::type> {
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using R = typename std::result_of<F(Args...)>::type;
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auto task = std::make_shared<std::packaged_task<R()>>(
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std::bind(std::forward<F>(f), std::forward<Args>(args)...));
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if (_state == INIT) {
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_init();
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}
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std::future<R> res = task->get_future();
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{
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std::unique_lock<std::mutex> lock(_mutex);
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_tasks.emplace([task]() { (*task)(); });
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}
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_condition.notify_one();
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return res;
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}
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size_t extraThreadCount() const {
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return _threadLimit;
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}
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private:
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enum State { INIT, RUN, FINISH };
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void _init();
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State _state;
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size_t _threadLimit;
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std::vector<std::thread> _workers;
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std::mutex _mutex;
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std::condition_variable _condition;
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std::queue<std::function<void()>> _tasks;
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};
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extern TaskPool globalTaskPool;
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#endif */ /* TASK_POOL_H */
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