Function curl_sys::curl_multi_fdset

pub unsafe extern "C" fn curl_multi_fdset(
    multi_handle: *mut CURLM, 
    read_fd_set: *mut fd_set, 
    write_fd_set: *mut fd_set, 
    exc_fd_set: *mut fd_set, 
    max_fd: *mut c_int
) -> CURLMcode