[−][src]Struct async_io::Timer
A future that expires at a point in time.
Timers are futures that output the Instant
at which they fired.
Examples
Sleep for 1 second:
use async_io::Timer; use std::time::Duration; async fn sleep(dur: Duration) { Timer::after(dur).await; } sleep(Duration::from_secs(1)).await;
Implementations
impl Timer
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pub fn after(duration: Duration) -> Timerⓘ
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Creates a timer that expires after the given duration of time.
Examples
use async_io::Timer; use std::time::Duration; Timer::after(Duration::from_secs(1)).await;
pub fn at(instant: Instant) -> Timerⓘ
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Creates a timer that expires at the given time instant.
Examples
use async_io::Timer; use std::time::{Duration, Instant}; let now = Instant::now(); let when = now + Duration::from_secs(1); Timer::at(when).await;
pub fn set_after(&mut self, duration: Duration)
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Sets the timer to expire after the new duration of time.
Note that resetting a timer is different from creating a new timer because
set_after()
does not remove the waker associated with the task
that is polling the timer.
Examples
use async_io::Timer; use std::time::Duration; let mut t = Timer::after(Duration::from_secs(1)); t.set_after(Duration::from_millis(100));
pub fn set_at(&mut self, instant: Instant)
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Sets the timer to expire at the new time instant.
Note that resetting a timer is different from creating a new timer because
set_after()
does not remove the waker associated with the task
that is polling the timer.
Examples
use async_io::Timer; use std::time::{Duration, Instant}; let mut t = Timer::after(Duration::from_secs(1)); let now = Instant::now(); let when = now + Duration::from_secs(1); t.set_at(when);
Trait Implementations
Auto Trait Implementations
impl RefUnwindSafe for Timer
impl Send for Timer
impl Sync for Timer
impl Unpin for Timer
impl UnwindSafe for Timer
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<F> FutureExt for F where
F: Future + ?Sized,
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F: Future + ?Sized,
fn or<F>(self, other: F) -> Or<Self, F> where
F: Future<Output = Self::Output>,
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F: Future<Output = Self::Output>,
fn boxed(self) -> Pin<Box<dyn Future<Output = Self::Output> + 'static + Send>> where
Self: Send + 'static,
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Self: Send + 'static,
fn boxed_local(self) -> Pin<Box<dyn Future<Output = Self::Output> + 'static>> where
Self: 'static,
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Self: 'static,
impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,