7 use std::time::{Duration, Instant};
15 pub type AtToken = Option<Instant>;
20     delivery_time: Instant,
29     pub fn new_deadline(when: Instant) -> Self {  in new_deadline()
38         Self::new_deadline(Instant::now() + dur)  in new_timeout()
43     pub fn try_recv(&self) -> Result<Instant, TryRecvError> {  in try_recv()  argument
50         if Instant::now() < self.delivery_time {  in try_recv()
67     pub fn recv(&self, deadline: Option<Instant>) -> Result<Instant, RecvTimeoutError> {  in recv()  argument
77             let now = Instant::now();  in recv()
106     pub unsafe fn read(&self, token: &mut Token) -> Result<Instant, ()> {  in read()  argument
119         if Instant::now() < self.delivery_time {  in is_empty()
168     fn deadline(&self) -> Option<Instant> {  in deadline()  argument