Struct devela::_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.

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impl RawWaker

const: 1.36.0 · source

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

Available on crate feature task only.

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.

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

🔬This is a nightly-only experimental API. (waker_getters)
Available on crate feature task only.

Get the data pointer used to create this RawWaker.

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

🔬This is a nightly-only experimental API. (waker_getters)
Available on crate feature task only.

Get the vtable pointer used to create this RawWaker.

Trait Implementations§

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impl Debug for RawWaker

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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,

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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.

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impl PartialEq for RawWaker

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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.
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impl StructuralPartialEq for RawWaker

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Also for T

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fn also_mut<F: FnOnce(&mut Self)>(self, f: F) -> Self

Available on crate feature result only.
Applies a function which takes the parameter by exclusive reference, and then returns the (possibly) modified owned value. Read more
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fn also_ref<F: FnOnce(&Self)>(self, f: F) -> Self

Available on crate feature result only.
Applies a function which takes the parameter by shared reference, and then returns the (possibly) modified owned value. Read more
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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> AnyExt for T
where T: Any,

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fn type_of(&self) -> TypeId

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Returns the TypeId of self. Read more
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fn type_name(&self) -> &'static str

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Returns the type name of self. Read more
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fn type_is<T: 'static>(&self) -> bool

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Returns true if Self is of type T. Read more
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fn as_any_ref(&self) -> &dyn Any
where Self: Sized,

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Upcasts &self as &dyn Any. Read more
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fn as_any_mut(&mut self) -> &mut dyn Any
where Self: Sized,

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Upcasts &mut self as &mut dyn Any. Read more
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fn as_any_box(self: Box<Self>) -> Box<dyn Any>
where Self: Sized,

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Upcasts Box<self> as Box<dyn Any>. Read more
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impl<T, Res> Apply<Res> for T
where T: ?Sized,

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fn apply<F: FnOnce(Self) -> Res>(self, f: F) -> Res
where Self: Sized,

Available on crate feature result only.
Apply a function which takes the parameter by value.
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fn apply_ref<F: FnOnce(&Self) -> Res>(&self, f: F) -> Res

Available on crate feature result only.
Apply a function which takes the parameter by shared reference.
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fn apply_mut<F: FnOnce(&mut Self) -> Res>(&mut self, f: F) -> Res

Available on crate feature result only.
Apply a function which takes the parameter by exclusive reference.
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

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

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

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const NEEDS_DROP: bool = _

Available on crate feature mem only.
Whether dropping values of this type matters.
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fn mem_needs_drop(&self) -> bool

Available on crate feature mem only.
Returns true if dropping values of this type matters.
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fn mem_drop(self)
where Self: Sized,

Available on crate feature mem only.
Drops self by running its destructor.
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fn mem_forget(self)
where Self: Sized,

Available on crate feature mem only.
Forgets about self without running its destructor.
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fn mem_replace(&mut self, other: Self) -> Self
where Self: Sized,

Available on crate feature mem only.
Replaces self with other, returning the previous value of self.
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fn mem_take(&mut self) -> Self
where Self: Default,

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Replaces self with its default value, returning the previous value of self.
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fn mem_swap(&mut self, other: &mut Self)
where Self: Sized,

Available on crate feature mem only.
Swaps the value of self and other without deinitializing either one.
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fn mem_as_bytes(&self) -> &[u8] ⓘ
where Self: Sync + Unpin,

Available on crate features mem and unsafe_mem only.
View a Sync + Unpin self as &[u8]. Read more
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fn mem_as_bytes_mut(&mut self) -> &mut [u8] ⓘ
where Self: Sync + Unpin,

Available on crate features mem and unsafe_mem only.
View a Sync + Unpin self as &mut [u8].
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impl<T> Size for T

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const BYTE_ALIGN: usize = _

Available on crate feature mem only.
The alignment of this type in bytes.
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const BYTE_SIZE: usize = _

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The size of this type in bytes.
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const PTR_SIZE: usize = 8usize

Available on crate feature mem only.
The size of a pointer in bytes, for the current platform.
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fn byte_align(&self) -> usize

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Returns the alignment of this type in bytes.
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fn byte_size(&self) -> usize

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Returns the size of this type in bytes. Read more
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fn ptr_ratio(&self) -> (usize, usize)

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Returns the size ratio between PTR_SIZE and BYTE_SIZE. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.