Type Alias PerBufferCache 

pub type PerBufferCache<T> = Arc<ArcSwap<HashMap<BufferId, Arc<T>>>>;

Per-buffer cache slot — the canonical Slice 3b shape for per-buffer LSP feature data.

Use PerBufferCacheExt for the read / write / remove helpers; the raw type exposes only what ArcSwap exposes.

Aliased Type

pub struct PerBufferCache<T> { /* private fields */ }

Trait Implementations

impl<T> PerBufferCacheExt<T> for PerBufferCache<T>

fn get_for(&self, id: BufferId) -> Option<Arc<T>>

Wait-free read: returns a detached Arc<T> snapshot of the cache entry for id, or None if no entry exists. The returned Arc is independent of any subsequent store; the renderer can hold it across the frame.

fn insert_for(&self, id: BufferId, value: T)

Store (or replace) the cache entry for id. Copy-on- write: clones the current HashMap, inserts, stores.

fn remove_for(&self, id: BufferId)

Remove the cache entry for id if present. No-op when the entry doesn’t exist. Copy-on-write semantics.

fn retain<F: FnMut(BufferId, &T) -> bool>(&self, predicate: F)

Retain only entries matching the predicate. Mirrors HashMap::retain’s semantics: the predicate sees each (BufferId, &T); entries returning false are dropped.

fn is_empty_snapshot(&self) -> bool

Returns true when no entries exist. Wait-free.