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https://github.com/status-im/react-native.git
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20a8673b48
Summary: @public There are some race conditions between VM objects getting deallocated and the instanceHandle held by the eventEmitter can point to deallocated memory space, causing undefined behavior like a crash. For now, keep a strong ref to the eventTarget inside EventEmitter to avoid that scenario. This is a temporary workaround. Reviewed By: shergin Differential Revision: D8576785 fbshipit-source-id: 87ef36f716270ceca906b32bb86e0046ceaca19e
56 lines
1.6 KiB
C++
56 lines
1.6 KiB
C++
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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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 "SchedulerEventDispatcher.h"
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namespace facebook {
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namespace react {
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// TODO(T29874519): Get rid of "top" prefix once and for all.
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/*
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* Capitalizes the first letter of the event type and adds "top" prefix
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* (e.g. "layout" becames "topLayout").
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*/
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static std::string normalizeEventType(const std::string &type) {
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std::string prefixedType = type;
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prefixedType[0] = toupper(prefixedType[0]);
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prefixedType.insert(0, "top");
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return prefixedType;
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}
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void SchedulerEventDispatcher::setUIManager(std::shared_ptr<const FabricUIManager> uiManager) const {
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uiManager_ = uiManager;
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}
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EventTarget SchedulerEventDispatcher::createEventTarget(const InstanceHandle &instanceHandle) const {
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assert(uiManager_ && "Attempted to create EventTarget after FabricUIManager dies.");
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return uiManager_->createEventTarget(instanceHandle);
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}
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void SchedulerEventDispatcher::dispatchEvent(
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const EventTarget &eventTarget,
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const std::string &type,
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const folly::dynamic &payload,
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const EventPriority &priority
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) const {
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if (!uiManager_) {
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return;
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}
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// TODO: Schedule the event based on priority.
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uiManager_->dispatchEvent(eventTarget, normalizeEventType(type), payload);
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}
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void SchedulerEventDispatcher::releaseEventTarget(const EventTarget &eventTarget) const {
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if (!uiManager_) {
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return;
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}
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uiManager_->releaseEventTarget(eventTarget);
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}
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} // namespace react
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} // namespace facebook
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