Struct WasiCtx

pub struct WasiCtx { /* private fields */ }

Per-Store state which holds state necessary to implement WASI from this crate.

This structure is created through WasiCtxBuilder and is stored within the T of Store<T>. Access to the structure is provided through the WasiView trait as an implementation on T.

Note that this structure itself does not have any accessors, it’s here for internal use within the wasmtime-wasi crate’s implementation of bindgen-generated traits.

Example

use wasmtime_wasi::{ResourceTable, WasiCtx, WasiCtxView, WasiView, WasiCtxBuilder};

struct MyState {
    ctx: WasiCtx,
    table: ResourceTable,
}

impl WasiView for MyState {
    fn ctx(&mut self) -> WasiCtxView<'_> {
        WasiCtxView { ctx: &mut self.ctx, table: &mut self.table }
    }
}

impl MyState {
    fn new() -> MyState {
        let mut wasi = WasiCtxBuilder::new();
        wasi.arg("./foo.wasm");
        wasi.arg("--help");
        wasi.env("FOO", "bar");

        MyState {
            ctx: wasi.build(),
            table: ResourceTable::new(),
        }
    }
}

Implementations

impl WasiCtx

pub fn builder() -> WasiCtxBuilder

Convenience function for calling WasiCtxBuilder::new.

Trait Implementations

impl Default for WasiCtx

fn default() -> WasiCtx

Returns the “default value” for a type.