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64 lines
1.4 KiB
C++
64 lines
1.4 KiB
C++
//
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// AsyncTaskQueue.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 07/10/2016.
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// Copyright © 2016 Thomas Harte. All rights reserved.
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//
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#ifndef AsyncTaskQueue_hpp
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#define AsyncTaskQueue_hpp
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#include <memory>
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#include <thread>
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#include <list>
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#include <condition_variable>
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#ifdef __APPLE__
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#include <dispatch/dispatch.h>
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#endif
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namespace Concurrency {
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/*!
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An async task queue allows a caller to enqueue void(void) functions. Those functions are guaranteed
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to be performed serially and asynchronously from the caller. A caller may also request to flush,
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causing it to block until all previously-enqueued functions are complete.
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*/
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class AsyncTaskQueue {
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public:
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AsyncTaskQueue();
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~AsyncTaskQueue();
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/*!
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Adds @c function to the queue.
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@discussion Functions will be performed serially and asynchronously. This method is safe to
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call from multiple threads.
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@parameter function The function to enqueue.
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*/
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void enqueue(std::function<void(void)> function);
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/*!
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Blocks the caller until all previously-enqueud functions have completed.
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*/
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void flush();
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private:
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#ifdef __APPLE__
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dispatch_queue_t serial_dispatch_queue_;
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#else
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std::unique_ptr<std::thread> thread_;
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std::mutex queue_mutex_;
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std::list<std::function<void(void)>> pending_tasks_;
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std::condition_variable processing_condition_;
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std::atomic_bool should_destruct_;
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#endif
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};
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}
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#endif /* Concurrency_hpp */
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