Module session_kv 

Session-scoped key-value store: the trait an embedder implements and a bounded in-memory implementation.

Keys and payloads are UTF-16 code units end to end. A payload can contain lone surrogates — a value a Submilli string may legally hold — so nothing here round-trips through a Rust String, which would replace them.

The store outlives the Wasm store it is read from, so it never retains guest GC references: serialization to code units happens above this layer.

Structs

InMemorySessionKv

Bounded in-memory store.

SessionKvEntry

Key plus retained payload size — what list may disclose. Never contents.

SessionKvLimits

SessionKvPage

One page of a key scan.

SharedKvBudget

An aggregate byte budget several sessions reserve against.

Enums

SessionKvError

SessionKvLimitKind

Which bound a rejected operation ran into. Carries the numbers, never the value — an error message about a quota must not leak session contents.

Constants

DEFAULT_MAX_ENTRIES

DEFAULT_MAX_KEY_UNITS

UTF-16 code units in a nonempty key.

DEFAULT_MAX_SESSION_BYTES

Retained serialized payload per session.

DEFAULT_MAX_VALUE_BYTES

Serialized payload of a single value.

Traits

SessionKvStore

Session-scoped key-value storage.