Struct kernel::serial_trace::subscriber::Interest

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pub struct Interest(InterestKind);
Expand description

Indicates a Subscriber’s interest in a particular callsite.

Subscribers return an Interest from their register_callsite methods in order to determine whether that span should be enabled or disabled.

Tuple Fields§

§0: InterestKind

Implementations§

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impl Interest

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pub fn never() -> Interest

Returns an Interest indicating that the subscriber is never interested in being notified about a callsite.

If all active subscribers are never() interested in a callsite, it will be completely disabled unless a new subscriber becomes active.

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pub fn sometimes() -> Interest

Returns an Interest indicating the subscriber is sometimes interested in being notified about a callsite.

If all active subscribers are sometimes or never interested in a callsite, the currently active subscriber will be asked to filter that callsite every time it creates a span. This will be the case until a new subscriber expresses that it is always interested in the callsite.

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pub fn always() -> Interest

Returns an Interest indicating the subscriber is always interested in being notified about a callsite.

If any subscriber expresses that it is always() interested in a given callsite, then the callsite will always be enabled.

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pub fn is_never(&self) -> bool

Returns true if the subscriber is never interested in being notified about this callsite.

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pub fn is_sometimes(&self) -> bool

Returns true if the subscriber is sometimes interested in being notified about this callsite.

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pub fn is_always(&self) -> bool

Returns true if the subscriber is always interested in being notified about this callsite.

Trait Implementations§

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impl Clone for Interest

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fn clone(&self) -> Interest

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Interest

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

Formats the value using the given formatter. Read more

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fn az<Dst>(self) -> Dst
where T: Cast<Dst>,

Casts the value.
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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
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fn borrow_mut(&mut self) -> &mut T

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impl<Src, Dst> CastFrom<Src> for Dst
where Src: Cast<Dst>,

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fn cast_from(src: Src) -> Dst

Casts the value.
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impl<T> CheckedAs for T

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fn checked_as<Dst>(self) -> Option<Dst>
where T: CheckedCast<Dst>,

Casts the value.
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impl<Src, Dst> CheckedCastFrom<Src> for Dst
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fn checked_cast_from(src: Src) -> Option<Dst>

Casts the value.
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where T: Clone,

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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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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> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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Calls U::from(self).

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Casts the value.
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Casts the value.
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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

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impl<T> UnwrappedAs for T

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fn unwrapped_as<Dst>(self) -> Dst
where T: UnwrappedCast<Dst>,

Casts the value.
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impl<Src, Dst> UnwrappedCastFrom<Src> for Dst
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fn unwrapped_cast_from(src: Src) -> Dst

Casts the value.
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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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where T: WrappingCast<Dst>,

Casts the value.
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where Src: WrappingCast<Dst>,

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fn wrapping_cast_from(src: Src) -> Dst

Casts the value.