react-native/React/Fabric/Utils/MessageQueueEventBeat.h
Valentin Shergin 26d0b05c80 Fabric: MessageQueueEventBeat
Summary:
@public
MessageQueueEventBeat implements particular Event Beat synchronized with Message Queue and calling a callback on the JS thread (aka Message Queue thread). The actual beat is synchronized with the main run loop.

Reviewed By: mdvacca

Differential Revision: D8886230

fbshipit-source-id: 97ef7d10f705789b4b0cd3a12389db960159f289
2018-08-27 07:32:34 -07:00

36 lines
868 B
C++

/**
* Copyright (c) 2015-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
#include <CoreFoundation/CoreFoundation.h>
#include <CoreFoundation/CFRunLoop.h>
#include <cxxreact/MessageQueueThread.h>
#include <fabric/events/EventBeat.h>
namespace facebook {
namespace react {
/*
* Event beat that associated with MessageQueueThread.
*/
class MessageQueueEventBeat:
public EventBeat {
public:
MessageQueueEventBeat(const std::shared_ptr<MessageQueueThread> &messageQueueThread);
~MessageQueueEventBeat();
void induce() const override;
private:
const std::shared_ptr<MessageQueueThread> messageQueueThread_;
CFRunLoopObserverRef mainRunLoopObserver_;
mutable std::atomic<bool> isBusy_ {false};
};
} // namespace react
} // namespace facebook