hyper/common/
task.rs

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use std::{
    convert::Infallible,
    task::{Context, Poll},
};

/// A function to help "yield" a future, such that it is re-scheduled immediately.
///
/// Useful for spin counts, so a future doesn't hog too much time.
pub(crate) fn yield_now(cx: &mut Context<'_>) -> Poll<Infallible> {
    cx.waker().wake_by_ref();
    Poll::Pending
}