Struct S3FifoLayoutCache 

pub struct S3FifoLayoutCache { /* private fields */ }

Layout cache backed by S3-FIFO eviction.

Drop-in replacement for LayoutCache that uses the scan-resistant S3-FIFO eviction policy instead of the HashMap-based LRU. This protects frequently-accessed layout computations from being evicted by transient layouts (e.g. popup menus or tooltips that appear once).

Supports the same generation-based invalidation as LayoutCache.

Implementations

impl S3FifoLayoutCache

pub fn new(max_entries: usize) -> Self

Create a new S3-FIFO layout cache with the given capacity.

pub fn get_or_compute<F>( &mut self, key: LayoutCacheKey, compute: F, ) -> Vec<Rect>

where F: FnOnce() -> Vec<Rect>,

Get cached layout or compute and cache a new one.

Same semantics as LayoutCache::get_or_compute: entries from a previous generation are treated as misses.

pub fn invalidate_all(&mut self)

Invalidate all entries by bumping the generation (O(1)).

pub fn stats(&self) -> LayoutCacheStats

Get current cache statistics.

pub fn reset_stats(&mut self)

Reset statistics counters.

pub fn clear(&mut self)

Clear all entries.

pub fn len(&self) -> usize

Current number of entries.

pub fn is_empty(&self) -> bool

Whether the cache is empty.

pub fn capacity(&self) -> usize

Maximum capacity.

Trait Implementations

impl Debug for S3FifoLayoutCache

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

Formats the value using the given formatter.

impl Default for S3FifoLayoutCache

fn default() -> Self

Returns the “default value” for a type.