Cooperative cancellation for async Rust
See crate docs for details
You can use this crate to create a deadline received through a StopToken:
use async_std::prelude::*; use async_std::{stream, task}; use stop_token::prelude::*; use stop_token::StopSource; use std::time::Duration; #[async_std::main] async fn main() { // Create a stop source and generate a token. let src = StopSource::new(); let deadline = src.token(); // When stop source is dropped, the loop will stop. // Move the source to a task, and drop it after 100 millis. task::spawn(async move { task::sleep(Duration::from_millis(100)).await; drop(src); }); // Create a stream that generates numbers until // it receives a signal it needs to stop. let mut work = stream::repeat(12u8).timeout_at(deadline); // Loop over each item in the stream. while let Some(Ok(ev)) = work.next().await { println!("{}", ev); } }Or Instant to create a time-based deadline:
use async_std::prelude::*; use async_std::stream; use stop_token::prelude::*; use std::time::{Instant, Duration}; #[async_std::main] async fn main() { // Create a stream that generates numbers for 100 millis. let deadline = Instant::now() + Duration::from_millis(100); let mut work = stream::repeat(12u8).timeout_at(deadline); // Loop over each item in the stream. while let Some(Ok(ev)) = work.next().await { println!("{}", ev); } }