Method poll

bootloader/kernel/src/task/executor.rs:188–201

(
        mut self: core::pin::Pin<&mut Self>,
        cx: &mut core::task::Context<'_>,
    )

impl futures::future::Future for YieldOnce {
    type Output = ();
    fn poll(
        mut self: core::pin::Pin<&mut Self>,
        cx: &mut core::task::Context<'_>,
    ) -> core::task::Poll<Self::Output> {
        if !self.0 {
            self.as_mut().0 = true;
            let aw = AtomicWaker::new();
            aw.register(&cx.waker());
            YIELDERS.push(aw);
            core::task::Poll::Pending
        } else {
            core::task::Poll::Ready(())
        }
    }
}