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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
55 lines
1.2 KiB
C++
55 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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#include "EventQueue.h"
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#include "EventEmitter.h"
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namespace facebook {
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namespace react {
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EventQueue::EventQueue(EventPipe eventPipe, std::unique_ptr<EventBeat> eventBeat):
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eventPipe_(std::move(eventPipe)),
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eventBeat_(std::move(eventBeat)) {
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eventBeat_->setBeatCallback(std::bind(&EventQueue::onBeat, this));
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}
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void EventQueue::enqueueEvent(const RawEvent &rawEvent) const {
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std::lock_guard<std::mutex> lock(queueMutex_);
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queue_.push_back(rawEvent);
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}
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void EventQueue::onBeat() const {
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std::vector<RawEvent> queue;
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{
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std::lock_guard<std::mutex> lock(queueMutex_);
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if (queue_.size() == 0) {
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return;
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}
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queue = std::move(queue_);
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assert(queue_.size() == 0);
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}
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{
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std::lock_guard<std::recursive_mutex> lock(EventEmitter::DispatchMutex());
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for (const auto &event : queue) {
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auto eventTarget = event.eventTarget.lock();
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eventPipe_(
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eventTarget && event.isDispatchable() ? eventTarget.get() : nullptr,
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event.type,
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event.payload
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);
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}
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}
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}
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} // namespace react
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} // namespace facebook
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