// Unsafe counter

static mut count: uint = 0; 

fn update_count(id: uint) {
    unsafe { 
       println!("Before {:}: {:}", id, count);
       count += 1; 
       println!("After {:}: {:}", id, count);
    }
}

fn main() {
    for id in range(0u, 10) {
        spawn(proc() {
           for _ in range(0u, 1000) {
              update_count(id);
           }
        });
    }
    println!("Count: {:}", unsafe { count });
}