71 lines
2 KiB
Rust
71 lines
2 KiB
Rust
//! A `tokio` backend.
|
|
use futures::Future;
|
|
|
|
/// A `tokio` executor.
|
|
pub type Executor = tokio::runtime::Runtime;
|
|
|
|
impl crate::Executor for Executor {
|
|
fn new() -> Result<Self, futures::io::Error> {
|
|
tokio::runtime::Runtime::new()
|
|
}
|
|
|
|
#[allow(clippy::let_underscore_future)]
|
|
fn spawn(&self, future: impl Future<Output = ()> + Send + 'static) {
|
|
let _ = tokio::runtime::Runtime::spawn(self, future);
|
|
}
|
|
|
|
fn enter<R>(&self, f: impl FnOnce() -> R) -> R {
|
|
let _guard = tokio::runtime::Runtime::enter(self);
|
|
f()
|
|
}
|
|
}
|
|
|
|
pub mod time {
|
|
//! Listen and react to time.
|
|
use crate::core::Hasher;
|
|
use crate::subscription::{self, 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;
|
|
|
|
let start = tokio::time::Instant::now() + self.0;
|
|
|
|
let stream = {
|
|
futures::stream::unfold(
|
|
tokio::time::interval_at(start, self.0),
|
|
|mut interval| async move {
|
|
Some((interval.tick().await, interval))
|
|
},
|
|
)
|
|
};
|
|
|
|
stream.map(tokio::time::Instant::into_std).boxed()
|
|
}
|
|
}
|
|
}
|