Module vec_cache 

VecCache maintains a mapping from K -> (V, I) pairing. K and I must be roughly u32-sized, and V must be Copy.

VecCache supports efficient concurrent put/get across the key space, with write-once semantics (i.e., a given key can only be put once). Subsequent puts will panic.

This is currently used for query caching.

Structs

Slot 🔒

SlotIndex 🔒

This uniquely identifies a single Slot<V> entry in the buckets map, and provides accessors for either getting the value or putting a value.

VecCache

In-memory cache for queries whose keys are densely-numbered IDs (e.g CrateNum, LocalDefId), and can therefore be used as indices into a dense vector of cached values.

Constants

ENTRIES_BY_BUCKET 🔒