use std::sync::{
    atomic::{AtomicUsize, Ordering},
    Arc,
};

use std::thread::spawn;

fn main() {
    let x1 = Arc::new(AtomicUsize::new(0));
    let x2 = x1.clone();

    let t1 = spawn(move || {
        x1.store(1, Ordering::Relaxed);
        x1.store(2, Ordering::Relaxed);
    });

    let t2 = spawn(move || {
        loop {
            match x2.load(Ordering::Relaxed) {
                1 => {println!("1");break;},
                2 => {println!("2");break;},
            }
        }

    });


    t2.join().unwrap();
    t1.join().unwrap();
}