futures_bounded/
delay.rs

1use std::future::Future;
2use std::pin::Pin;
3use std::task::{ready, Context, Poll};
4use std::time::Duration;
5
6use futures_util::future::BoxFuture;
7use futures_util::FutureExt as _;
8
9pub struct Delay {
10    duration: Duration,
11    inner: BoxFuture<'static, ()>,
12}
13
14impl Delay {
15    #[cfg(feature = "tokio")]
16    pub fn tokio(duration: Duration) -> Self {
17        Self {
18            duration,
19            inner: tokio::time::sleep(duration).boxed(),
20        }
21    }
22
23    #[cfg(feature = "futures-timer")]
24    pub fn futures_timer(duration: Duration) -> Self {
25        Self {
26            duration,
27            inner: futures_timer::Delay::new(duration).boxed(),
28        }
29    }
30}
31
32impl Future for Delay {
33    type Output = Duration;
34
35    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
36        let this = self.get_mut();
37
38        ready!(this.inner.poll_unpin(cx));
39
40        Poll::Ready(this.duration)
41    }
42}
futures_bounded/delay.rs

futures_bounded/
delay.rs
