Crate uni_plugin_wasm_rt 

Shared runtime helpers for the uni-db WASM plugin loaders.

uni-plugin-wasm-rt is the M6.shared lift — a crate that sits below both uni-plugin-extism and uni-plugin-wasm in the dependency graph and owns the two pieces of machinery they would otherwise duplicate:

• Arrow IPC bridge (ipc) — RecordBatch ↔ stream bytes, shared between Extism’s bytes-in/bytes-out boundary and the Component Model’s linear-memory boundary.
• Pre-warmed instance pool (pool) — generic over the pooled instance type and the loader’s error type. Both loaders alias this with their concrete T and error.

Neither piece depends on extism or wasmtime; both depend only on arrow-ipc, crossbeam-queue, and parking_lot. That keeps the crate small and lets it stay below uni-plugin in the workspace dep graph, so the trait-only embedder pays nothing for plumbing they never invoke.

Modules

error

Shared error type for the wasm-rt IPC bridge.

ipc

Arrow IPC bridge — RecordBatch ↔ wire-stream bytes.

pool

Generic pre-warmed instance pool for wasm-backed plugins.

Structs

InstancePool

A pool of pre-warmed instances for one plugin.

PoolConfig

Per-pool configuration.

PoolMetrics

Pool metrics surface — read by host.metric_counter host imports.

PooledInstance

RAII wrapper acquired from an InstancePool: holds the instance and returns it to the pool on drop.

Enums

IpcError

Errors raised by the Arrow IPC bridge.

Functions

decode_batch

Decode the single RecordBatch from Arrow IPC stream bytes.

decode_batches

Decode every RecordBatch from Arrow IPC stream bytes.

encode_batch

Encode a RecordBatch as Arrow IPC stream bytes.

encode_batches

Encode multiple RecordBatches sharing a schema as one IPC stream.