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use consts::TIMER_RESOLUTION;
use futures::{Future, Stream, Sink, Poll, unsync};
use std::{cell::RefCell, rc::Rc};
use std::time::{Instant, Duration};
use tokio::timer::Delay;
use tokio_core::reactor::Handle;
use interface::WeakSharedPeer;
#[derive(Debug)]
pub enum TimerMessage {
PersistentKeepAlive(WeakSharedPeer),
PassiveKeepAlive(WeakSharedPeer),
Rekey(WeakSharedPeer, u32),
Wipe(WeakSharedPeer),
}
pub struct TimerHandle {
canceled: Rc<RefCell<bool>>
}
impl TimerHandle {
pub fn cancel(&mut self) {
*self.canceled.borrow_mut() = true;
}
}
pub struct Timer {
handle: Handle,
tx: unsync::mpsc::Sender<TimerMessage>,
rx: unsync::mpsc::Receiver<TimerMessage>,
}
impl Timer {
pub fn new(handle: Handle) -> Self {
let (tx, rx) = unsync::mpsc::channel::<TimerMessage>(1024);
Self { handle, tx, rx }
}
pub fn send_after(&mut self, delay: Duration, message: TimerMessage) -> TimerHandle {
trace!("queuing timer message {:?}", &message);
let canceled = Rc::new(RefCell::new(false));
let handle = self.handle.clone();
let tx = self.tx.clone();
let future = Delay::new(Instant::now() + delay + (*TIMER_RESOLUTION * 2))
.map_err(|e| panic!("timer failed; err={:?}", e))
.and_then({
let canceled = canceled.clone();
move |_| {
if !*canceled.borrow() {
handle.spawn(tx.send(message).then(|_| Ok(())))
} else {
debug!("timer cancel signal sent, won't send message.");
}
Ok(())
}});
self.handle.spawn(future);
TimerHandle { canceled }
}
}
impl Stream for Timer {
type Item = TimerMessage;
type Error = ();
fn poll(&mut self) -> Poll<Option<Self::Item>, Self::Error> {
self.rx.poll()
}
}
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