Struct rustls::limited_cache::LimitedCache

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pub(crate) struct LimitedCache<K: Clone + Hash + Eq, V> {
    map: HashMap<K, V>,
    oldest: VecDeque<K>,
}
Expand description

A HashMap-alike, which never gets larger than a specified capacity, and evicts the oldest insertion to maintain this.

The requested capacity may be rounded up by the underlying collections. This implementation uses all the allocated storage.

This is inefficient: it stores keys twice.

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§map: HashMap<K, V>§oldest: VecDeque<K>

Implementations§

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impl<K, V> LimitedCache<K, V>
where K: Eq + Hash + Clone + Debug, V: Default,

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pub(crate) fn new(capacity_order_of_magnitude: usize) -> Self

Create a new LimitedCache with the given rough capacity.

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pub(crate) fn get_or_insert_default_and_edit( &mut self, k: K, edit: impl FnOnce(&mut V), )

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pub(crate) fn insert(&mut self, k: K, v: V)

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pub(crate) fn get<Q: Hash + Eq + ?Sized>(&self, k: &Q) -> Option<&V>
where K: Borrow<Q>,

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pub(crate) fn get_mut<Q: Hash + Eq + ?Sized>(&mut self, k: &Q) -> Option<&mut V>
where K: Borrow<Q>,

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pub(crate) fn remove<Q: Hash + Eq + ?Sized>(&mut self, k: &Q) -> Option<V>
where K: Borrow<Q>,

Auto Trait Implementations§

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impl<K, V> Freeze for LimitedCache<K, V>

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impl<K, V> RefUnwindSafe for LimitedCache<K, V>

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impl<K, V> Send for LimitedCache<K, V>
where K: Send, V: Send,

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impl<K, V> Sync for LimitedCache<K, V>
where K: Sync, V: Sync,

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impl<K, V> Unpin for LimitedCache<K, V>
where K: Unpin, V: Unpin,

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impl<K, V> UnwindSafe for LimitedCache<K, V>
where K: UnwindSafe, V: 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,

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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, 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.