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use std::future::Future;
use std::pin::Pin;
use std::task::{Context, Poll};
doc_rt_core! {
/// Yield execution back to the Tokio runtime.
pub async fn yield_now() {
/// Yield implementation
struct YieldNow {
yielded: bool,
}
impl Future for YieldNow {
type Output = ();
fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<()> {
if self.yielded {
return Poll::Ready(());
}
self.yielded = true;
cx.waker().wake_by_ref();
Poll::Pending
}
}
YieldNow { yielded: false }.await
}
}
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