Function libusb_sys::libusb_set_pollfd_notifiers

pub unsafe extern "C" fn libusb_set_pollfd_notifiers(
    context: *mut libusb_context, 
    added_cb: libusb_pollfd_added_cb, 
    removed_cb: libusb_pollfd_removed_cb, 
    user_data: *mut c_void
)