headless_event_loop.h

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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#ifndef FLUTTER_SHELL_PLATFORM_GLFW_HEADLESS_EVENT_LOOP_H_
#define FLUTTER_SHELL_PLATFORM_GLFW_HEADLESS_EVENT_LOOP_H_
 
#include <condition_variable>
 
#include "flutter/shell/platform/glfw/event_loop.h"
 
namespace flutter {
 
// An event loop implementation that only handles Flutter Engine task
// scheduling.
class HeadlessEventLoop : public EventLoop {
 public:
  using TaskExpiredCallback = std::function<void(const FlutterTask*)>;
  HeadlessEventLoop(std::thread::id main_thread_id,
                    const TaskExpiredCallback& on_task_expired);
 
  ~HeadlessEventLoop();
 
  // Disallow copy.
  HeadlessEventLoop(const HeadlessEventLoop&) = delete;
  HeadlessEventLoop& operator=(const HeadlessEventLoop&) = delete;
 
 private:
  // |EventLoop|
  void WaitUntil(const TaskTimePoint& time) override;
 
  // |EventLoop|
  void Wake() override;
 
  std::condition_variable task_queue_condition_;
};
 
}  // namespace flutter
 
#endif  // FLUTTER_SHELL_PLATFORM_GLFW_HEADLESS_EVENT_LOOP_H_