Module retainer::entry

Small structures based around entries in the cache.

Each entry has an associated value and optional expiration, and access functions for both. To be more convenient to the called, a CacheEntry<V> will also dereference to V.

Structs

CacheEntry	Represents an entry inside the cache.
CacheEntryReadGuard	Read guard for references to the inner cache structure.
CacheExpiration	Small structure to represent expiration in a cache.