extern crate rand;

use std::sync::atomic::{AtomicUsize, Ordering, ATOMIC_USIZE_INIT};
use std::thread;
use std::time::Duration;

use rand::{thread_rng, Rng};

static COUNTER: AtomicUsize = ATOMIC_USIZE_INIT;

fn inc(id: u8) {
    let mut rng = thread_rng();
    let wait_ms = rng.gen_range(1, 500);
    thread::sleep(Duration::from_millis(wait_ms));
    let my_count = COUNTER.fetch_add(1, Ordering::SeqCst);
    println!("Thread {}, my count: {}", id, my_count);
}

fn main() {
    let mut handles = Vec::new();
    for i in 0..5 {
        handles.push(thread::spawn(move || inc(i)));
    }
    for handle in handles {
        let _ = handle.join();
    }
}