Struct wasmtime_provider::WasmtimeEngineProvider

pub struct WasmtimeEngineProvider { /* private fields */ }

A waPC engine provider that encapsulates the Wasmtime WebAssembly runtime

Implementations

impl WasmtimeEngineProvider

pub fn new(
    buf: &[u8],
    wasi: Option<WasiParams>
) -> Result<WasmtimeEngineProvider, Error>

Creates a new instance of a WasmtimeEngineProvider.

pub fn new_with_engine(
    buf: &[u8],
    engine: Engine,
    wasi: Option<WasiParams>
) -> Result<Self, Error>

Creates a new instance of a WasmtimeEngineProvider from a separately created wasmtime::Engine.

Trait Implementations

impl Clone for WasmtimeEngineProvider

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl WebAssemblyEngineProvider for WasmtimeEngineProvider

fn init(
    &mut self,
    host: Arc<ModuleState>
) -> Result<(), Box<dyn Error + Send + Sync + 'static>>

Tell the engine provider that it can do whatever processing it needs to do for initialization and give it access to the module state

fn call(
    &mut self,
    op_length: i32,
    msg_length: i32
) -> Result<i32, Box<dyn Error + Send + Sync + 'static>>

Trigger the waPC function call. Engine provider is responsible for execution and using the appropriate methods on the module host. When this function is complete, the guest response and optionally the guest error must be set to represent the high-level call result

fn replace(
    &mut self,
    module: &[u8]
) -> Result<(), Box<dyn Error + Send + Sync + 'static>>

Called by the host to replace the WebAssembly module bytes of the previously initialized module. Engine must return an error if it does not support bytes replacement.