On Tue, 6 May 2025 18:51:47 GMT, Andy Goryachev <ango...@openjdk.org> wrote:
>> `volatile` is not enough, because the different values are correlated (for >> example `foreground`, `background`, and `colorScheme`). All values need to >> be updated in a single transaction, as otherwise we could end up reading a >> transient combination of values. > > I see. The I suggest we enforce single-threaded nature of it: everything > must happen in the FX Application Thread. I don't think it's a good idea to > start synchronizing things in FX now all of a sudden. > > Any code that wants to access FX from a background thread must do so using a > combination of `runLater` and a `CountDownLatch`. > > What do you think? That would be okay, except that `Scene` is allowed to be created on a background thread (it's in the class documentation), so we can't completely enforce it to be single-threaded. Once a scene is created, a user can also request its preferences. This is when we need some way to get the current platform preferences on a background thread, as otherwise users would potentially see the scene preferences suddenly change once the scene is shown. ------------- PR Review Comment: https://git.openjdk.org/jfx/pull/1655#discussion_r2076107914
