[−][src]Struct core::task::Context
🔬 This is a nightly-only experimental API. (futures_api
#50547)
futures in libcore are unstable
Information about the currently-running task.
Contexts are always tied to the stack, since they are set up specifically
when performing a single poll
step on a task.
Methods
impl<'a> Context<'a>
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impl<'a> Context<'a>
pub fn new(local_waker: &'a LocalWaker, spawner: &'a mut Spawn) -> Context<'a>
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pub fn new(local_waker: &'a LocalWaker, spawner: &'a mut Spawn) -> Context<'a>
🔬 This is a nightly-only experimental API. (futures_api
#50547)
futures in libcore are unstable
Create a new task Context
with the provided local_waker
, waker
,
and spawner
.
pub fn local_waker(&self) -> &'a LocalWaker
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pub fn local_waker(&self) -> &'a LocalWaker
🔬 This is a nightly-only experimental API. (futures_api
#50547)
futures in libcore are unstable
Get the LocalWaker
associated with the current task.
pub fn waker(&self) -> &'a Waker
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pub fn waker(&self) -> &'a Waker
🔬 This is a nightly-only experimental API. (futures_api
#50547)
futures in libcore are unstable
Get the Waker
associated with the current task.
pub fn spawner(&mut self) -> &mut Spawn
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pub fn spawner(&mut self) -> &mut Spawn
🔬 This is a nightly-only experimental API. (futures_api
#50547)
futures in libcore are unstable
Get the spawner associated with this task.
This method is useful primarily if you want to explicitly handle spawn failures.
pub fn with_waker<'b>(&'b mut self, local_waker: &'b LocalWaker) -> Context<'b>
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pub fn with_waker<'b>(&'b mut self, local_waker: &'b LocalWaker) -> Context<'b>
🔬 This is a nightly-only experimental API. (futures_api
#50547)
futures in libcore are unstable
Produce a context like the current one, but using the given waker instead.
This advanced method is primarily used when building "internal schedulers" within a task, where you want to provide some customized wakeup logic.
pub fn with_spawner<'b, Sp: Spawn>(
&'b mut self,
spawner: &'b mut Sp
) -> Context<'b>
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pub fn with_spawner<'b, Sp: Spawn>(
&'b mut self,
spawner: &'b mut Sp
) -> Context<'b>
🔬 This is a nightly-only experimental API. (futures_api
#50547)
futures in libcore are unstable
Produce a context like the current one, but using the given spawner instead.
This advanced method is primarily used when building "internal schedulers" within a task.
Trait Implementations
Auto Trait Implementations
Blanket Implementations
impl<T, U> Into for T where
U: From<T>,
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impl<T, U> Into for T where
U: From<T>,
impl<T> From for T
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impl<T> From for T
impl<T, U> TryInto for T where
U: TryFrom<T>,
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impl<T, U> TryInto for T where
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(Self) -> Result<U, <U as TryFrom<T>>::Error>
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fn try_into(Self) -> Result<U, <U as TryFrom<T>>::Error>
Performs the conversion.
impl<T, U> TryFrom for T where
T: From<U>,
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impl<T, U> TryFrom for T where
T: From<U>,
type Error = !
The type returned in the event of a conversion error.
fn try_from(U) -> Result<T, <T as TryFrom<U>>::Error>
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fn try_from(U) -> Result<T, <T as TryFrom<U>>::Error>
Performs the conversion.
impl<T> Borrow for T where
T: ?Sized,
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impl<T> Borrow for T where
T: ?Sized,
impl<T> BorrowMut for T where
T: ?Sized,
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impl<T> BorrowMut for T where
T: ?Sized,
fn borrow_mut(&mut Self) -> &mut T
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fn borrow_mut(&mut Self) -> &mut T
Mutably borrows from an owned value. Read more
impl<T> Any for T where
T: 'static + ?Sized,
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impl<T> Any for T where
T: 'static + ?Sized,
fn get_type_id(&Self) -> TypeId
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fn get_type_id(&Self) -> TypeId
🔬 This is a nightly-only experimental API. (get_type_id
#27745)
this method will likely be replaced by an associated static
Gets the TypeId
of self
. Read more