[][src]Struct std::task::Waker

#[repr(transparent)]
pub struct Waker { /* fields omitted */ }
🔬 This is a nightly-only experimental API. (futures_api #50547)

futures in libcore are unstable

A Waker is a handle for waking up a task by notifying its executor that it is ready to be run.

This handle contains a trait object pointing to an instance of the UnsafeWake trait, allowing notifications to get routed through it.

Methods

impl Waker
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🔬 This is a nightly-only experimental API. (futures_api #50547)

futures in libcore are unstable

Constructs a new Waker directly.

Note that most code will not need to call this. Implementers of the UnsafeWake trait will typically provide a wrapper that calls this but you otherwise shouldn't call it directly.

If you're working with the standard library then it's recommended to use the Waker::from function instead which works with the safe Arc type and the safe Wake trait.

🔬 This is a nightly-only experimental API. (futures_api #50547)

futures in libcore are unstable

Wake up the task associated with this Waker.

🔬 This is a nightly-only experimental API. (futures_api #50547)

futures in libcore are unstable

Returns whether or not this Waker and other awaken the same task.

This function works on a best-effort basis, and may return false even when the Wakers would awaken the same task. However, if this function returns true, it is guaranteed that the Wakers will awaken the same task.

This function is primarily used for optimization purposes.

🔬 This is a nightly-only experimental API. (futures_api #50547)

futures in libcore are unstable

Returns whether or not this Waker and other LocalWaker awaken the same task.

This function works on a best-effort basis, and may return false even when the Wakers would awaken the same task. However, if this function returns true, it is guaranteed that the Wakers will awaken the same task.

This function is primarily used for optimization purposes.

Trait Implementations

impl Debug for Waker
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impl Unpin for Waker
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impl Sync for Waker
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impl Send for Waker
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impl Clone for Waker
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Performs copy-assignment from source. Read more

impl From<LocalWaker> for Waker
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Converts a LocalWaker into a Waker.

This conversion turns a !Sync LocalWaker into a Sync Waker, allowing a wakeup object to be sent to another thread, but giving up its ability to do specialized thread-local wakeup behavior.

impl Drop for Waker
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impl<T> From<Arc<T>> for Waker where
    T: Wake + 'static, 
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Blanket Implementations

impl<T, U> TryFrom for T where
    T: From<U>, 
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🔬 This is a nightly-only experimental API. (try_from #33417)

The type returned in the event of a conversion error.

impl<T> From for T
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impl<T, U> TryInto for T where
    U: TryFrom<T>, 
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🔬 This is a nightly-only experimental API. (try_from #33417)

The type returned in the event of a conversion error.

impl<T, U> Into for T where
    U: From<T>, 
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impl<T> Borrow for T where
    T: ?Sized
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impl<T> BorrowMut for T where
    T: ?Sized
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impl<T> Any for T where
    T: 'static + ?Sized
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impl<T> ToOwned for T where
    T: Clone
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