Struct metered::HitCount

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pub struct HitCount<C: Counter = AtomicInt<u64>>(pub C);

Expand description

A metric counting how many times an expression as been hit, before it returns.

This is a light-weight metric.

By default, HitCount uses a lock-free u64 Counter, which makes sense in multithread scenarios. Non-threaded applications can gain performance by using a std::cell:Cell<u64> instead.

Tuple Fields

0: C

Trait Implementations

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impl<C: Counter> Clear for HitCount<C>

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fn clear(&self)

Requests to clear self.

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impl<C: Clone + Counter> Clone for HitCount<C>

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fn clone(&self) -> HitCount<C>

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<C: Debug + Counter> Debug for HitCount<C>

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

Formats the value using the given formatter. Read more

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impl<C: Default + Counter> Default for HitCount<C>

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fn default() -> HitCount<C>

Returns the “default value” for a type. Read more

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impl<C: Counter> Deref for HitCount<C>

type Target = C

The resulting type after dereferencing.

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fn deref(&self) -> &Self::Target

Dereferences the value.

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impl<C: Counter> Enter for HitCount<C>

type E = ()

The type returned by the enter function and carried to OnResult

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fn enter(&self) -> Self::E

enter is called when entering in an aspect Read more

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impl<C: Counter, R> OnResult<R> for HitCount<C>

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fn on_result(&self, enter: Self::E, _result: &R) -> Advice

Called when an expression has returned. Read more

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fn leave_scope(&self, _enter: Self::E) -> Advice

Called when an expression has exited, but the return value isn’t known. This can happen because of a panic, or if control flow bypasses a macro. This is also called by the default implementation of on_result. Read more

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impl<C: Counter> Serialize for HitCount<C> where
C: Serialize,

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fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where
S: Serializer,

Serialize this value into the given Serde serializer. Read more

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impl<C: Counter, R> Metric<R> for HitCount<C>

Auto Trait Implementations

impl<C> RefUnwindSafe for HitCount<C> where
C: RefUnwindSafe,

impl<C> Send for HitCount<C> where
C: Send,

impl<C> Sync for HitCount<C> where
C: Sync,

impl<C> Unpin for HitCount<C> where
C: Unpin,

impl<C> UnwindSafe for HitCount<C> where
C: UnwindSafe,

Blanket Implementations

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

const: unstable · source

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,

const: unstable · source

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

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into 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.

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impl<R, A> OnResultMut<R> for A where
A: OnResult<R>,

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fn on_result(&self, enter: <A as Enter>::E, result: &mut R) -> Advice

Called when an expression has returned. Read more

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fn leave_scope(&self, enter: <A as Enter>::E) -> Advice

Called when an expression has exited, but the return value isn’t known. This can happen because of a panic, or if control flow bypasses a macro. This is also called by the default implementation of on_result. Read more

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impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

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impl<T, U> TryFrom 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>::Error>

Performs the conversion.

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

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

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

Performs the conversion.

Struct metered::HitCount

Tuple Fields

Trait Implementations

impl<C: Counter> Clear for HitCount<C>

fn clear(&self)

impl<C: Clone + Counter> Clone for HitCount<C>

fn clone(&self) -> HitCount<C>

fn clone_from(&mut self, source: &Self)

impl<C: Debug + Counter> Debug for HitCount<C>

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

impl<C: Default + Counter> Default for HitCount<C>

fn default() -> HitCount<C>

impl<C: Counter> Deref for HitCount<C>

type Target = C

fn deref(&self) -> &Self::Target

impl<C: Counter> Enter for HitCount<C>

type E = ()

fn enter(&self) -> Self::E

impl<C: Counter, R> OnResult<R> for HitCount<C>

fn on_result(&self, enter: Self::E, _result: &R) -> Advice

fn leave_scope(&self, _enter: Self::E) -> Advice

impl<C: Counter> Serialize for HitCount<C> where C: Serialize,

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error> where __S: Serializer,

impl<C: Counter, R> Metric<R> for HitCount<C>

Auto Trait Implementations

impl<C> RefUnwindSafe for HitCount<C> where C: RefUnwindSafe,

impl<C> Send for HitCount<C> where C: Send,

impl<C> Sync for HitCount<C> where C: Sync,

impl<C> Unpin for HitCount<C> where C: Unpin,

impl<C> UnwindSafe for HitCount<C> where C: UnwindSafe,

Blanket Implementations

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

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

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

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

impl<R, A> OnResultMut<R> for A where A: OnResult<R>,

fn on_result(&self, enter: <A as Enter>::E, result: &mut R) -> Advice

fn leave_scope(&self, enter: <A as Enter>::E) -> Advice

impl<T> ToOwned for T where T: Clone,

type Owned = T

fn to_owned(&self) -> T

fn clone_into(&self, target: &mut T)

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

type Error = Infallible

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

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

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

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

impl<C: Counter> Serialize for HitCount<C> where
C: Serialize,

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where
S: Serializer,

impl<C> RefUnwindSafe for HitCount<C> where
C: RefUnwindSafe,

impl<C> Send for HitCount<C> where
C: Send,

impl<C> Sync for HitCount<C> where
C: Sync,

impl<C> Unpin for HitCount<C> where
C: Unpin,

impl<C> UnwindSafe for HitCount<C> where
C: UnwindSafe,

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

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

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

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

impl<R, A> OnResultMut<R> for A where
A: OnResult<R>,

impl<T> ToOwned for T where
T: Clone,

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

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