yuzu is the world's most popular, open-source, Nintendo Switch emulator — started by the creators of Citra. It is written in C++ with portability in mind,
CallbackStatus instances aren't the cheapest things to copy around
(relative to everything else), given that they're currently 520 bytes in
size and are currently copied numerous times when callbacks are invoked.
Instead, we can pass the status by const reference to avoid all the
copying.