# [−][src]Trait std::task::Wake

    pub trait Wake: Send + Sync {
        fn wake(arc_self: &Arc<Self>);

        unsafe fn wake_local(arc_self: &Arc<Self>) { ... }
    }

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

futures in libcore are unstable

A way of waking up a specific task.

Any task executor must provide a way of signaling that a task it owns is ready to be `poll`ed again. Executors do so by implementing this trait.

## Required Methods

### `fn wake(arc_self: &Arc<Self>)`

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

futures in libcore are unstable

Indicates that the associated task is ready to make progress and should be `poll`ed.

Executors generally maintain a queue of "ready" tasks; `wake` should place the associated task onto this queue.

## Provided Methods

### `unsafe fn wake_local(arc_self: &Arc<Self>)`

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

futures in libcore are unstable

Indicates that the associated task is ready to make progress and should be `poll`ed. This function is like `wake`, but can only be called from the thread on which this `Wake` was created.

Executors generally maintain a queue of "ready" tasks; `wake_local` should place the associated task onto this queue.

## Implementors

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