Struct SizeClassCache 

pub struct SizeClassCache {
    pub bump: usize,
    pub capacity: usize,
    pub generation: u32,
    pub hits: usize,
    pub misses: usize,
}

Per-size-class cache for frequently-used allocation sizes.

Fields

bump: usize

Bump pointer into the cache buffer.

capacity: usize

Total capacity of this cache.

generation: u32

Current generation counter (incremented on eviction).

hits: usize

Number of hits for cache statistics.

misses: usize

Number of misses for cache statistics.

Implementations

impl SizeClassCache

pub const fn new(capacity: usize) -> SizeClassCache

Creates a new cache with the given capacity.

pub fn has_space(&self) -> bool

Returns true if the cache has space available.

pub fn allocate(&mut self) -> Option<usize>

Attempts to allocate a block from the cache. Returns the index if successful, None if cache is full.

pub fn reset(&mut self)

Resets the cache by clearing the bump pointer and incrementing generation. This is called when the cache fills up and needs to evict all entries.

pub fn hit_ratio(&self) -> u8

Returns the cache hit ratio as a percentage (0-100).

Trait Implementations

impl Clone for SizeClassCache

fn clone(&self) -> SizeClassCache

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SizeClassCache

impl Debug for SizeClassCache

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

Formats the value using the given formatter.