private:

template <class TAction>

Mso::Future<void> PostInUIQueue(TAction &&action) noexcept;

template <class TAction>

inline Mso::Future<void> CompositionReactViewInstance::PostInUIQueue(TAction &&action) noexcept {

// ReactViewInstance has shorter lifetime than ReactRootControl. Thus, we capture this WeakPtr.

auto promise = Mso::Promise<void>();

m_uiDispatcher.Post([promise, weakThis{get_weak()}, action{std::forward<TAction>(action)}]() mutable {

if (auto strongThis = weakThis.get()) {

if (auto rootControl = strongThis->m_weakRootControl.get()) {

action(rootControl);

promise.SetValue();

return;

}

}

promise.TryCancel();

});

return promise.AsFuture();

}

void ReactContext::Destroy() noexcept {

if (auto notificationService =

winrt::get_self<winrt::Microsoft::ReactNative::implementation::ReactNotificationService>(m_notifications)) {

notificationService->UnsubscribeAll();

}

}

// ReactContext may have longer lifespan than ReactInstance.

// The ReactInstance uses the Destroy method to enforce the ReactContext cleanup

// when the ReactInstance is destroyed.

void Destroy() noexcept;