/* * Copyright (c) Meta Platforms, Inc. and affiliates. * * This source code is licensed under the MIT license found in the * LICENSE file in the root directory of this source tree. */ #include "AsynchronousEventBeat.h" #include namespace facebook::react { AsynchronousEventBeat::AsynchronousEventBeat( RunLoopObserver::Unique uiRunLoopObserver, RuntimeExecutor runtimeExecutor) : EventBeat({}), uiRunLoopObserver_(std::move(uiRunLoopObserver)), runtimeExecutor_(std::move(runtimeExecutor)) { uiRunLoopObserver_->setDelegate(this); uiRunLoopObserver_->enable(); } void AsynchronousEventBeat::activityDidChange( RunLoopObserver::Delegate const *delegate, RunLoopObserver::Activity /*activity*/) const noexcept { react_native_assert(delegate == this); induce(); } void AsynchronousEventBeat::induce() const { if (!isRequested_ || isBeatCallbackScheduled_) { return; } isRequested_ = false; // Here we know that `this` object exists because the caller has a strong // pointer to `owner`. To ensure the object will exist inside // `runtimeExecutor_` callback, we need to copy the pointer there. auto weakOwner = uiRunLoopObserver_->getOwner(); isBeatCallbackScheduled_ = true; runtimeExecutor_([this, weakOwner](jsi::Runtime &runtime) { isBeatCallbackScheduled_ = false; auto owner = weakOwner.lock(); if (!owner) { return; } if (beatCallback_) { beatCallback_(runtime); } }); } } // namespace facebook::react