The file/method naming is a bit confusing, the FFI bindings are generated for both PolyvoxFilamentApi.h and PolyvoxFilamentFFIApi.h, it's just that every method on the latter runs on the Engine thread. Likewise the "_ffi" suffix isn't really accurate either.
Should probably rename to something more like PolyvoxFilamentFFIRenderThread.h and _engine_thread.
The file/method naming is a bit confusing, the FFI bindings are generated for both PolyvoxFilamentApi.h and PolyvoxFilamentFFIApi.h, it's just that every method on the latter runs on the Engine thread. Likewise the "_ffi" suffix isn't really accurate either.
Should probably rename to something more like
PolyvoxFilamentFFIRenderThread.hand_engine_thread.