SDL_GL_SwapWindow freezes in a threaded renderer

[PunkPun]

In OpenRA I tried to update to the latest SDL2 version and it seems that freezing on moving a window persists.

On Windows windowed mode OpenRA has avoided using threaded rendering for over 6 years due to other freezing issues, however when updating from 2.0.22 issues came to macOS as well.

Any Idea what could be causing a forever loop in SDL_GL_SwapWindow in a treaded context on macOS?

OpenRA/OpenRA#20642 was the tracking issue that got fixed with us downgrading SDL2 2.26.1 -> 2.0.22. We had also downgraded because of #7507, but it was fixed in recent versions of SDL

[icculus]

This is always going to be dicey on macOS, but try adding this:

SDL_SetHint(SDL_HINT_MAC_OPENGL_ASYNC_DISPATCH, "1");