#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::sync::atomic::{AtomicPtr, Ordering};
fn main() {
    let some_ptr = AtomicPtr::new(&mut 5);
    let new = &mut 10;
    let mut old = some_ptr.load(Ordering::Relaxed);
    loop {
        match some_ptr
            .compare_exchange_weak(old, new, Ordering::SeqCst, Ordering::Relaxed)
        {
            Ok(_) => break,
            Err(x) => old = x,
        }
    }
}