pub fn interval(
period: Duration,
nursery: impl Nurse<()> + Timer + Send + Sync + Clone + 'static
) -> Source<usize>
Expand description
A callbag listenable source that sends incremental numbers every x milliseconds.
Examples
use async_executors::TimerExt;
use async_nursery::Nursery;
use crossbeam_queue::SegQueue;
use std::{sync::Arc, time::Duration};
use callbag::{for_each, interval};
let (nursery, nursery_out) = Nursery::new(async_executors::AsyncStd);
let actual = Arc::new(SegQueue::new());
let source = interval(Duration::from_millis(1_000), nursery.clone());
for_each({
let actual = Arc::clone(&actual);
move |x| {
println!("{}", x);
actual.push(x);
}
})(source);
let nursery_out = nursery.timeout(Duration::from_millis(4_500), nursery_out);
drop(nursery);
async_std::task::block_on(nursery_out);
assert_eq!(
&{
let mut v = vec![];
for _i in 0..actual.len() {
v.push(actual.pop().unwrap());
}
v
}[..],
[0, 1, 2, 3]
);