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2217a3a42d
The number of workers depends on what the platform deem appropriate for the system at runtime.
56 lines
1.4 KiB
C++
56 lines
1.4 KiB
C++
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef FLUTTER_FML_CONCURRENT_MESSAGE_LOOP_H_
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#define FLUTTER_FML_CONCURRENT_MESSAGE_LOOP_H_
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#include <atomic>
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#include <chrono>
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#include <condition_variable>
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#include <thread>
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#include <vector>
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#include "flutter/fml/macros.h"
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#include "flutter/fml/message_loop_impl.h"
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#include "flutter/fml/synchronization/count_down_latch.h"
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#include "flutter/fml/synchronization/thread_annotations.h"
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namespace fml {
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class ConcurrentMessageLoop : public MessageLoopImpl {
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private:
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const size_t worker_count_;
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std::mutex wait_condition_mutex_;
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std::condition_variable wait_condition_;
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std::vector<std::thread> workers_;
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CountDownLatch shutdown_latch_;
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std::chrono::high_resolution_clock::time_point next_wake_;
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std::atomic_bool shutdown_;
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ConcurrentMessageLoop();
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~ConcurrentMessageLoop();
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// |fml::MessageLoopImpl|
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void Run() override;
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// |fml::MessageLoopImpl|
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void Terminate() override;
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// |fml::MessageLoopImpl|
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void WakeUp(fml::TimePoint time_point) override;
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static void WorkerMain(ConcurrentMessageLoop* loop);
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void WorkerMain();
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FML_FRIEND_MAKE_REF_COUNTED(ConcurrentMessageLoop);
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FML_FRIEND_REF_COUNTED_THREAD_SAFE(ConcurrentMessageLoop);
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FML_DISALLOW_COPY_AND_ASSIGN(ConcurrentMessageLoop);
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};
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} // namespace fml
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#endif // FLUTTER_FML_CONCURRENT_MESSAGE_LOOP_H_
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