A New Architecture for a GUI Framework

Code would look like this:

    for (vwt = wy_vwt_create(); event = wy_event(); vwt = wy_vwt_freeze())
    {
      switch (event->type)
      {
        // Handle event types...
      }
    }

Behind the scenes, the framework would create several threads: one for the client, one for the UI, one for accessibility, etc.

The `wy_vwt_freeze()` is the call that would freeze the current VWT, but it would also send notifications to those other threads to do their thing, and they can work separately.

This also allows clients to handle events while the next frame is being rendered.

So the way to prevent the UI thread from being blocked is to just separate it from the event thread, something VWTs allow by construction.

And of course, I would create the threads under structured concurrency, but it's not the key part.

Does that make sense?