# Struct std::task::RawWaker

1.36.0 · source ·

    pub struct RawWaker { /* private fields */ }

Expand description

A `RawWaker` allows the implementor of a task executor to create a `Waker` which provides customized wakeup behavior.

It consists of a data pointer and a virtual function pointer table (vtable) that customizes the behavior of the `RawWaker`.

## Implementations§

source§

### impl RawWaker

const: 1.36.0 · source

#### pub const fn new(data: *const (), vtable: &'static RawWakerVTable) -> RawWaker

Creates a new `RawWaker` from the provided `data` pointer and `vtable`.

The `data` pointer can be used to store arbitrary data as required by the executor. This could be e.g. a type-erased pointer to an `Arc` that is associated with the task. The value of this pointer will get passed to all functions that are part of the `vtable` as the first parameter.

The `vtable` customizes the behavior of a `Waker` which gets created from a `RawWaker`. For each operation on the `Waker`, the associated function in the `vtable` of the underlying `RawWaker` will be called.

source

#### pub fn data(&self) -> *const ()

🔬This is a nightly-only experimental API. (`waker_getters` #87021)

Get the `data` pointer used to create this `RawWaker`.

source

#### pub fn vtable(&self) -> &'static RawWakerVTable

🔬This is a nightly-only experimental API. (`waker_getters` #87021)

Get the `vtable` pointer used to create this `RawWaker`.

## Trait Implementations§

source§

### impl Debug for RawWaker

source§

#### fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
1.51.0 · source§

### impl<W> From<Arc<W>> for RawWaker where W: Wake + Send + Sync + 'static,

source§

#### fn from(waker: Arc<W>) -> RawWaker

Use a `Wake`-able type as a `RawWaker`.

No heap allocations or atomic operations are used for this conversion.

source§

### impl PartialEq for RawWaker

source§

#### fn eq(&self, other: &RawWaker) -> bool

This method tests for `self` and `other` values to be equal, and is used by `==`.
1.0.0 · source§

#### fn ne(&self, other: &Rhs) -> bool

This method tests for `!=`. The default implementation is almost always sufficient, and should not be overridden without very good reason.
source§

### impl StructuralPartialEq for RawWaker

## Auto Trait Implementations§

§

### impl RefUnwindSafe for RawWaker

§

### impl !Send for RawWaker

§

### impl !Sync for RawWaker

§

### impl Unpin for RawWaker

§

### impl UnwindSafe for RawWaker

## Blanket Implementations§

source§

### impl<T> Any for Twhere T: 'static + ?Sized,

source§

#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more
source§

### impl<T> Borrow<T> for Twhere T: ?Sized,

source§

#### fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

### impl<T> BorrowMut<T> for Twhere T: ?Sized,

source§

#### fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
source§

### impl<T> From<T> for T

source§

#### fn from(t: T) -> T

Returns the argument unchanged.

source§

### impl<T, U> Into<U> for Twhere U: From<T>,

source§

#### fn into(self) -> U

Calls `U::from(self)`.

That is, this conversion is whatever the implementation of `From<T> for U` chooses to do.

source§

### impl<T, U> TryFrom<U> for Twhere U: Into<T>,

§

#### type Error = Infallible

The type returned in the event of a conversion error.
source§

#### fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

### impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

§

#### type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
source§

#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.