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https://github.com/status-im/react-native.git
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c25d5948a5
Summary: As we did in the previous diff, here we implemented `EventEmitter`'s ownership model as a `shared_ptr`. This change fixes problem with leaking `WeakObject`s which happens on hot-reload. So, in short: * `EventTargetWrapper` object owns `jsi::WeakObject` that can be converted to actual `jsi::Object` that represent event target in JavaScript realm; * `EventTargetWrapper` and `jsi::WeakObject` objects must be deallocated as soon as native part does not need them anymore; * `EventEmitter` objects retain `EventTarget` objects; * `EventEmitter` can loose event target object in case if assosiated `ShadowNode` got unmounted (not deallocated); in this case `EventEmitter` is loosing possibility to dispatch event even if some mounting-layer code is still retaining it. Reviewed By: mdvacca Differential Revision: D9762755 fbshipit-source-id: 96e989767a32914db9f4627fce51b044c71f257a
50 lines
1.2 KiB
C++
50 lines
1.2 KiB
C++
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#pragma once
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#include <memory>
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#include <fabric/events/EventBeat.h>
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#include <fabric/events/EventQueue.h>
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#include <fabric/events/primitives.h>
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#include <fabric/events/RawEvent.h>
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namespace facebook {
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namespace react {
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class EventDispatcher;
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using SharedEventDispatcher = std::shared_ptr<const EventDispatcher>;
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using WeakEventDispatcher = std::weak_ptr<const EventDispatcher>;
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/*
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* Represents event-delivery infrastructure.
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* Particular `EventEmitter` clases use this for sending events.
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*/
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class EventDispatcher {
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public:
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EventDispatcher(
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const EventPipe &eventPipe,
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const EventBeatFactory &synchonousEventBeatFactory,
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const EventBeatFactory &asynchonousEventBeatFactory
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);
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/*
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* Dispatches a raw event with given priority using event-delivery pipe.
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*/
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void dispatchEvent(
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const RawEvent &rawEvent,
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EventPriority priority
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) const;
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private:
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std::array<std::unique_ptr<EventQueue>, 4> eventQueues_;
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};
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} // namespace react
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} // namespace facebook
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