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: loom_multi_thread_alt.rs
    path of file: ./repos/tokio/tokio/src/runtime/tests
    
    the code of the file until where you have to start completion: mod queue;
mod shutdown;
mod yield_now;

/// Full runtime loom tests. These are heavy tests and take significant time to
/// run on CI.
///
/// Use `LOOM_MAX_PREEMPTIONS=1` to do a "quick" run as a smoke test.
///
/// In order to speed up the C
use crate::future::poll_fn;
use crate::runtime::tests::loom_oneshot as oneshot;
use crate::runtime::{self, Runtime};
use crate::{spawn, task};
use tokio_test::assert_ok;

use loom
    
fn gated2(thread: bool) -> impl Future<Output = &'static str> {
    use loom::thread;
    use std::sync::Arc;

    let gate = Arc::new(AtomicBool::new(false));
    let mut fired = false;

    poll_fn(move |cx| {
        if !fired {
            let gate = gate.clone();
            let waker = cx.waker().clone();

            if thread {
                thread::spawn(move || {
                    gate.store(true, SeqCst);
                    waker.wake_by_ref();
                });
            } else {
                spawn(track(async move {
                    gate.store(true, SeqCst);
                    waker.wake_by_ref();
                }));
            }

            fired = true;

            return Poll::Pending;
        }

        if gate.load(SeqCst) {
            Poll::Ready("hello world")
        } else {
            Poll::Pending
        }
    })
}