C++: How to call a function after Async request ?

Development Programming & Scripting
1

Hello. I know how to call the functions Async template and FFunctionGraphTask::CreateAndDispatchWhenReady.

But I don’t know how to get the result. I want to do a lot of math operations and return TArray as result and call the function in the main thread.

For example:

FGraphEventRef DoThisTask = FFunctionGraphTask::CreateAndDispatchWhenReady([&a1]()
	{
		a1 = 400;
		UE_LOG(LogTemp, Warning, TEXT("Variable a1 %d"), a1);
	}, TStatId(), NULL, ENamedThreads::AnyThread);

Or

AsyncTask(ENamedThreads::AnyHiPriThreadNormalTask, [FindedActors, this]()
    {
            // something
     }
    });

But I don’t know how to get the result.

Question 2: how to send the data to the child thread ? For example I want the Async thread to stop when I call some function in a class. How do I stop the thread ?

Thanks.