Dino Music
e06f1302bf
Change-Id: I44188fa2f60f2492e05596464c914b8c739be482
[ROCm/hip-tests commit: 36620358e6]
65 line
2.3 KiB
C++
65 line
2.3 KiB
C++
/*
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Copyright (c) 2023 Advanced Micro Devices, Inc. All rights reserved.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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#pragma once
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#include <atomic>
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#include <thread>
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#include <boost/asio/post.hpp>
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#include <boost/asio/thread_pool.hpp>
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// This is a simple wrapper around boost::asio::thread_pool that keeps track of the number of
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// currently active tasks using an atomic counter.
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class ThreadPool {
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public:
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ThreadPool(size_t thread_count = std::thread::hardware_concurrency())
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: thread_count_(thread_count) {}
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~ThreadPool() { thread_pool_.join(); }
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// Submits a task to the thread pool and increments the number of active tasks. The task is
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// wrapped in a lambda that decrements the number of active tasks upon completion.
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template <typename T> void Post(T&& task) {
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++active_tasks_;
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auto&& task_wrapper = [task, this] {
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task();
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--active_tasks_;
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};
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boost::asio::post(thread_pool_, task_wrapper);
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}
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// Busy waits for the number of active tasks to reach zero.
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void Wait() const {
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while (active_tasks_.load(std::memory_order_relaxed))
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;
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}
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size_t thread_count() const { return thread_count_; }
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private:
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const size_t thread_count_;
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boost::asio::thread_pool thread_pool_{thread_count_};
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std::atomic<size_t> active_tasks_;
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};
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inline ThreadPool thread_pool{};
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