Struct ShapeCache 

pub struct ShapeCache { /* private fields */ }

Thread-safe bounded LRU cache for ShapedRuns.

Wraps lru::LruCache in an RwLock. Cache misses trigger a write lock, cache hits also require a write lock because LRU must update the recency order on every get.

Implementations

impl ShapeCache

pub fn new(capacity: usize) -> Self

Creates a new cache with the given capacity.

If capacity is 0, falls back to a minimum capacity of 1 so the cache is always usable without panicking.

pub fn get(&self, key: &ShapeKey) -> Option<Arc<ShapedRun>>

Look up a cached ShapedRun by key.

Returns Some(Arc<ShapedRun>) on a cache hit and updates the LRU order. Returns None on a miss or if the lock is poisoned.

pub fn insert(&self, key: ShapeKey, run: Arc<ShapedRun>)

Insert a ShapedRun into the cache.

Evicts the least-recently-used entry if the cache is at capacity. Silently no-ops if the lock is poisoned.

pub fn len(&self) -> usize

Returns the number of entries currently in the cache.

pub fn is_empty(&self) -> bool

Returns true if the cache contains no entries.

Trait Implementations

impl Debug for ShapeCache

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

Formats the value using the given formatter.