Cargo.toml

[package]
name = "delay_test"
version = "0.1.0"
authors = ["Ömer Sinan Ağacan <[email protected]>"]
edition = "2018"

[dependencies]
tokio = { git = "https://github.com/tokio-rs/tokio.git", features = ["timer"] }
futures-preview = { version = "0.3.0-alpha.18",  features = ["async-await", "nightly"] }
futures-util-preview = "0.3.0-alpha.18"

gistfile1.txt

delay_test git:(master) $ cargo run
   Compiling delay_test v0.1.0 (/home/omer/rust/delay_test)
    Finished dev [unoptimized + debuginfo] target(s) in 0.82s
     Running `target/debug/delay_test`
done
main returns

main.rs

use futures::select;
use std::time::Duration;
use tokio::timer;

fn main() {
    let mut executor = tokio::runtime::current_thread::Runtime::new().unwrap();
    // let executor = tokio::runtime::Runtime::new().unwrap();

    executor.spawn(async {
        let mut delay1 = timer::delay_for(Duration::from_secs(3));
        let mut delay2 = timer::delay_for(Duration::from_secs(3));

        select! {
            () = delay1 => {
                println!("delay 1");
            },
            () = delay2 => {
                println!("delay 2");
            },
            complete => {
                println!("done");
            }
        }
    });

    executor.run().unwrap();
    // executor.shutdown_on_idle();

    println!("main returns");
}