Struct devela::_std::task::Context

1.36.0 · source · 
pub struct Context<'a> { /* private fields */ }
Expand description

The context of an asynchronous task.

Currently, Context only serves to provide access to a &Waker which can be used to wake the current task.

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impl<'a> Context<'a>

const: unstable · source

pub fn from_waker(waker: &'a Waker) -> Context<'a>

Available on crate feature task only.

Create a new Context from a &Waker.

const: unstable · source

pub fn waker(&self) -> &'a Waker

Available on crate feature task only.

Returns a reference to the Waker for the current task.

Trait Implementations§

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impl Debug for Context<'_>

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<'a> RefUnwindSafe for Context<'a>

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impl<'a> !Send for Context<'a>

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impl<'a> !Sync for Context<'a>

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impl<'a> Unpin for Context<'a>

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impl<'a> UnwindSafe for Context<'a>

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

Available on crate feature any only.
Returns the TypeId of self. Read more
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fn type_name(&self) -> &'static str

Available on crate feature any only.
Returns the type name of self. Read more
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fn type_is<T: 'static>(&self) -> bool

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

Available on crate feature any only.
Upcasts &self as &dyn Any. Read more
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fn as_any_mut(&mut self) -> &mut dyn Any
where Self: Sized,

Available on crate feature any only.
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,

Available on crate feature any only.
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,

Available on crate feature mem only.
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 = _

Available on crate feature mem only.
The size of this type in bytes.
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const PTR_SIZE: usize = 4usize

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

Available on crate feature mem only.
Returns the alignment of this type in bytes.
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fn byte_size(&self) -> usize

Available on crate feature mem only.
Returns the size of this type in bytes. Read more
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fn ptr_ratio(&self) -> (usize, usize)

Available on crate feature mem only.
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.