cool

mod.rs

macro_rules! concurrent {
        (
            [ $($pass_rc:ident),* ];$($x:expr);*;
        ) => {
            {
                {
                $(
                    let $pass_rc = Arc::new($pass_rc);
                    let $pass_rc = &$pass_rc.clone();
                )*
                std::thread::spawn(move || {
                    $(
                        $x;
                    )*

                })
            }
        }
    }
}

        // Start the broadcasting, pass the Arc of multicast_addr and b_stopper
        let handle = concurrent! {[self.multicast_addr, self.b_stopper];
            broadcast(send_socket, multicast_addr,
            b_stopper).unwrap();
        };