[PATCH 0/8] MR8965: Draft: win32u: Flush window surfaces from owner thread, while waiting for messages.

[Rémi Bernon (＠rbernon)]

Instead of https://gitlab.winehq.org/wine/wine/-/merge_requests/8869

I think this would be a much lighter and less complicated approach than trying to wake the window threads with internal messages. And it should be able to avoid spurious wake ups when there's no window surfaces involved.

What I'm not completely sure about is whether this is going to flush the surfaces frequently enough, and if we can assume the window thread will always either peek or wait for messages.