# Struct core::task::LocalWaker[−][src]

    #[repr(transparent)]
    pub struct LocalWaker { /* fields omitted */ }

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

futures in libcore are unstable

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

This is similar to the `Waker` type, but cannot be sent across threads. Task executors can use this type to implement more optimized singlethreaded wakeup behavior.

## Methods

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`impl LocalWaker`

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####

`pub unsafe fn new(inner: NonNull<UnsafeWake>) -> Self`

[src]

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

futures in libcore are unstable

Constructs a new `LocalWaker` 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 `local_waker_from_nonlocal` or `local_waker` to convert a `Waker` into a `LocalWaker`.

For this function to be used safely, it must be sound to call `inner.wake_local()` on the current thread.

####

`pub fn wake(&self)`

[src]

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

futures in libcore are unstable

Wake up the task associated with this `LocalWaker`.

####

`pub fn will_wake(&self, other: &LocalWaker) -> bool`

[src]

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

futures in libcore are unstable

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

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

This function is primarily used for optimization purposes.

####

`pub fn will_wake_nonlocal(&self, other: &Waker) -> bool`

[src]

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

futures in libcore are unstable

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

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

This function is primarily used for optimization purposes.

## Trait Implementations

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`impl Unpin for LocalWaker`

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`impl !Send for LocalWaker`

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`impl !Sync for LocalWaker`

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`impl From<LocalWaker> for Waker`

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`fn from(local_waker: LocalWaker) -> Self`

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Performs the conversion.

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`impl Clone for LocalWaker`

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####

`fn clone(&self) -> Self`

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Returns a copy of the value. Read more

####

`fn clone_from(&mut self, source: &Self)`

1.0.0
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Performs copy-assignment from `source`. Read more

###

`impl Debug for LocalWaker`

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####

`fn fmt(&self, f: &mut Formatter) -> Result`

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Formats the value using the given formatter. Read more

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`impl Drop for LocalWaker`

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`fn drop(&mut self)`

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Executes the destructor for this type. Read more

## Auto Trait Implementations

###

`impl !Sync for LocalWaker`

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