Function libpd_sys::libpd_poll_gui

pub unsafe extern "C" fn libpd_poll_gui() -> c_int

manually update and handle any GUI messages this is called automatically when using a libpd_process function, note: this also facilitates network message processing, etc so it can be useful to call repeatedly when idle for more throughput returns 1 if the poll found something, in which case it might be desirable to poll again, up to some reasonable limit