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

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.

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

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

Get the data pointer used to create this RawWaker.

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

impl Debug for RawWaker

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: 'static + Wake + Send + Sync,

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.

impl PartialEq<RawWaker> for RawWaker

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

This method tests for self and other values to be equal, and is used by ==. Read more

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

This method tests for !=.

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

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

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

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

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T where
U: From<T>,

const: unstable · 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.

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

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

Performs the conversion.

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

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

The type returned in the event of a conversion error.

const: unstable · source

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

Performs the conversion.