blob: be258b26237691af745df869d5989b49ae9401ec (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
//! An `async-std` backend.
/// An `async-std` executor.
#[derive(Debug)]
pub struct Executor;
impl crate::Executor for Executor {
fn new() -> Result<Self, futures::io::Error> {
Ok(Self)
}
#[allow(clippy::let_underscore_future)]
fn spawn(&self, future: impl Future<Output = ()> + Send + 'static) {
let _ = async_std::task::spawn(future);
}
}
pub mod time {
//! Listen and react to time.
use crate::subscription::{self, Hasher, Subscription};
/// Returns a [`Subscription`] that produces messages at a set interval.
///
/// The first message is produced after a `duration`, and then continues to
/// produce more messages every `duration` after that.
pub fn every(
duration: std::time::Duration,
) -> Subscription<std::time::Instant> {
subscription::from_recipe(Every(duration))
}
#[derive(Debug)]
struct Every(std::time::Duration);
impl subscription::Recipe for Every {
type Output = std::time::Instant;
fn hash(&self, state: &mut Hasher) {
use std::hash::Hash;
std::any::TypeId::of::<Self>().hash(state);
self.0.hash(state);
}
fn stream(
self: Box<Self>,
_input: subscription::EventStream,
) -> futures::stream::BoxStream<'static, Self::Output> {
use futures::stream::StreamExt;
async_std::stream::interval(self.0)
.map(|_| std::time::Instant::now())
.boxed()
}
}
}
|
