You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: task_atomic_waker.rs
    path of file: ./repos/phaser/phaser/vendor/futures/tests
    
    the code of the file until where you have to start completion: use futures::executor::block_on;
use futures::future::poll_fn;
use futures::task::{AtomicWaker, Poll};
use std::sync::atomic::AtomicUsize;
use std::sync::atomic::Ordering;
use std::sync::Arc;
use std::thread;

#[test]
fn basic() {
    let atomic_waker = Arc::new(AtomicWaker::new());
    let atomic_waker_copy = atomic_waker.clone();

    let returned_pending = Arc::new(AtomicUsize::new(0));
    let returned_pending_copy = returned_pending.clone();

    let woken = Arc::new(AtomicUsize::new(0));
    let woken_copy = woken.clone();

    let t = thread::spawn(move || {
        let mut pending_count = 0;

        block_on(poll_fn(move |cx| {
            if woken_copy.load(Ordering::Relaxed) == 1 {
                Poll::Ready(())
            } else {
                // Assert we return pending exactly once
                assert_eq!(0, pending_count);
                pending_count += 1;
                atomic_waker_copy.register(cx.waker());

                returned_pending_co
    
fn basic() {
    let atomic_waker = Arc::new(AtomicWaker::new());
    let atomic_waker_copy = atomic_waker.clone();

    let returned_pending = Arc::new(AtomicUsize::new(0));
    let returned_pending_copy = returned_pending.clone();

    let woken = Arc::new(AtomicUsize::new(0));
    let woken_copy = woken.clone();

    let t = thread::spawn(move || {
        let mut pending_count = 0;

        block_on(poll_fn(move |cx| {
            if woken_copy.load(Ordering::Relaxed) == 1 {
                Poll::Ready(())
            } else {
                // Assert we return pending exactly once
                assert_eq!(0, pending_count);
                pending_count += 1;
                atomic_waker_copy.register(cx.waker());

                returned_pending_copy.store(1, Ordering::Relaxed);

                Poll::Pending
            }
        }))
    });

    while returned_pending.load(Ordering::Relaxed) == 0 {}

    // give spawned thread some time to sleep in `block_on`
    thread::yield_now();

    woken.store(1, Ordering::Relaxed);
    atomic_waker.wake();

    t.join().unwrap();
}