Struct KvSize

pub struct KvSize(pub(crate) AtomicUsize);

The size of the collection.

We use an atomic value here to enable operating the size without a mutable reference. See collections::AtomicMutGuard for more details.

In the most cases, we have the mutable reference of this struct, so we can directly operate the underlying value.

Tuple Fields

0: AtomicUsize

Implementations

impl KvSize

pub fn new() -> Self

pub fn with_size(size: usize) -> Self

pub fn add<K: EstimateSize, V: EstimateSize>(&mut self, key: &K, val: &V)

pub fn sub<K: EstimateSize, V: EstimateSize>(&mut self, key: &K, val: &V)

pub fn add_val<V: EstimateSize>(&mut self, val: &V) -> usize

Add the size of val and return it.

pub fn sub_val<V: EstimateSize>(&mut self, val: &V)

pub fn add_size(&mut self, size: usize)

pub fn sub_size(&mut self, size: usize)

pub fn update_size_atomic(&self, from: usize, to: usize)

Update the size of the collection by to - from atomically, i.e., without a mutable reference.

pub fn set(&mut self, size: usize)

pub fn size(&self) -> usize

Trait Implementations

impl Clone for KvSize

Clone the KvSize will duplicate the underlying value.

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Default for KvSize

fn default() -> KvSize

Returns the “default value” for a type.

impl GenericKvSize for &KvSize

For immutable references, the size is updated atomically.

fn update_size(&mut self, from: usize, to: usize)

impl GenericKvSize for &mut KvSize

For mutable references, the size can be directly updated.

fn update_size(&mut self, from: usize, to: usize)