#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::sync::atomic::{self, AtomicBool};
fn main() {
    let ptr: *mut bool = Box::into_raw(Box::new(false));
    assert!(ptr.cast::< AtomicBool > ().is_aligned());
    {
        let atomic = unsafe { AtomicBool::from_ptr(ptr) };
        atomic.store(true, atomic::Ordering::Relaxed);
    }
    assert_eq!(unsafe { * ptr }, true);
    unsafe { drop(Box::from_raw(ptr)) }
}