Trait IoView

Source

pub trait IoView: Send {
    // Required method
    fn table(&mut self) -> &mut ResourceTable;
}

Expand description

A trait which provides access to the ResourceTable inside the embedder’s T of Store<T>.

This crate’s WASI Host implementations depend on the contents of ResourceTable. The T type Store<T> is defined in each embedding of Wasmtime. These implementations is connected to the Linker<T> by the add_to_linker_async function.

§Example

use wasmtime::{Config, Engine};
use wasmtime::component::{ResourceTable, Linker};
use wasmtime_wasi_io::{IoView, add_to_linker_async};

struct MyState {
    table: ResourceTable,
}

impl IoView for MyState {
    fn table(&mut self) -> &mut ResourceTable { &mut self.table }
}
let mut config = Config::new();
config.async_support(true);
let engine = Engine::new(&config).unwrap();
let mut linker: Linker<MyState> = Linker::new(&engine);
add_to_linker_async(&mut linker).unwrap();