pub unsafe extern "C" fn retro_run()Expand description
Runs the game for one video frame. During retro_run(), input_poll callback must be called at least once.
If a frame is not rendered for reasons where a game “dropped” a frame, this still counts as a frame, and retro_run() should explicitly dupe a frame if GET_CAN_DUPE returns true. In this case, the video callback can take a NULL argument for data.