Struct WasmExecutor 

pub struct WasmExecutor { /* private fields */ }

Wraps a wasmtime Module + Store + Instance under a single async-friendly handle.

Implementations

impl WasmExecutor

pub fn from_path(path: impl AsRef<Path>) -> Result<Self>

Load .wasm bytes from disk.

pub fn from_bytes(bytes: &[u8]) -> Result<Self>

Build an executor from raw .wasm bytes.

pub fn list_exports(&self) -> Vec<String>

Enumerate exported function names.

pub fn call_i32_to_i32(&self, name: &str, arg: i32) -> Result<i32>

Invoke name(x: i32) -> i32.

pub fn call_json(&self, method: &str, input: &Value) -> Result<Value>

Call a WASM guest method with JSON input and receive JSON output.

The guest must export three symbols:

• alloc(size: i32) -> i32 — allocate size bytes, return pointer
• free(ptr: i32, size: i32) — free a previous allocation
• oxide_invoke(method_ptr: i32, method_len: i32, input_ptr: i32, input_len: i32) -> i64 — dispatch; the i64 return packs output ptr (high 32 bits) and len (low 32 bits).

Errors

Returns KernelError::Other if any WASM call fails, memory is out of bounds, or the output bytes are not valid UTF-8 / JSON.

pub fn engine(&self) -> &Engine

Underlying wasmtime engine, for callers that want to share it with other modules.