Структура CtrlLogoff

use tokio::signal::windows::ctrl_logoff;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    // An listener of CTRL-LOGOFF events.
    let mut signal = ctrl_logoff()?;

    // Print whenever a CTRL-LOGOFF event is received.
    signal.recv().await;
    println!("got CTRL-LOGOFF. Cleaning up before exiting");

    Ok(())
}

use std::pin::Pin;
use std::future::Future;
use std::task::{Context, Poll};
use tokio::signal::windows::CtrlLogoff;

struct MyFuture {
    ctrl_logoff: CtrlLogoff,
}

impl Future for MyFuture {
    type Output = Option<()>;

    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
        println!("polling MyFuture");
        self.ctrl_logoff.poll_recv(cx)
    }
}