use arc_swap::ArcSwap;
use std::sync::Arc;
use std::thread;

fn test(a_s: ArcSwap<u32>) {
    thread::spawn(move || {
        a_s.swap(Arc::new(11));
    });
}

fn main() {
    let a_s = ArcSwap::from(Arc::new(22));
    test(a_s.clone());
    println!("{}", a_s.load());
}