| use crate::Stream; |
| use std::pin::Pin; |
| use std::task::{Context, Poll}; |
| use tokio::time::{Instant, Interval}; |
| |
| /// A wrapper around [`Interval`] that implements [`Stream`]. |
| /// |
| /// [`Interval`]: struct@tokio::time::Interval |
| /// [`Stream`]: trait@crate::Stream |
| #[derive(Debug)] |
| #[cfg_attr(docsrs, doc(cfg(feature = "time")))] |
| pub struct IntervalStream { |
| inner: Interval, |
| } |
| |
| impl IntervalStream { |
| /// Create a new `IntervalStream`. |
| pub fn new(interval: Interval) -> Self { |
| Self { inner: interval } |
| } |
| |
| /// Get back the inner `Interval`. |
| pub fn into_inner(self) -> Interval { |
| self.inner |
| } |
| } |
| |
| impl Stream for IntervalStream { |
| type Item = Instant; |
| |
| fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Instant>> { |
| self.inner.poll_tick(cx).map(Some) |
| } |
| |
| fn size_hint(&self) -> (usize, Option<usize>) { |
| (std::usize::MAX, None) |
| } |
| } |
| |
| impl AsRef<Interval> for IntervalStream { |
| fn as_ref(&self) -> &Interval { |
| &self.inner |
| } |
| } |
| |
| impl AsMut<Interval> for IntervalStream { |
| fn as_mut(&mut self) -> &mut Interval { |
| &mut self.inner |
| } |
| } |