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use futures::{Future, Stream, Async, Poll};
use {Sleep, TimerError};
use std::time::Duration;
#[derive(Debug)]
pub struct Interval {
sleep: Sleep,
duration: Duration,
}
pub fn new(sleep: Sleep, dur: Duration) -> Interval {
Interval {
sleep: sleep,
duration: dur,
}
}
impl Stream for Interval {
type Item = ();
type Error = TimerError;
fn poll(&mut self) -> Poll<Option<()>, TimerError> {
let _ = try_ready!(self.sleep.poll());
self.sleep = self.sleep.timer().sleep(self.duration);
Ok(Async::Ready(Some(())))
}
}