use std::cell::UnsafeCell;
use std::thread;

struct ExtremelyBadIdea(pub *mut u128);

unsafe impl Send for ExtremelyBadIdea { }
unsafe impl Sync for ExtremelyBadIdea { }

fn main() {
    const LEN: usize = 10000;
    let buf = UnsafeCell::new([0u128; LEN]);
    let mut handles = Vec::new();

    for _ in 0..100 {
        let handle = ExtremelyBadIdea(buf.get() as *mut u128);

        handles.push(thread::spawn(move || {
            let ptr = handle.0;

            for i in 0..LEN {
                unsafe { *ptr.add(i) = *ptr.add(i) + 4_999_999_999; }
            }
        }));
    }

    for h in handles {
        h.join().unwrap();
    }

    for i in 0..100 {
        println!("{}", unsafe { &*buf.get() }[i]);
    }
}