Question about import host async fn...

[rsta79]

Summary

How can I import a host async function like exmaples?
(maybe not 100% correct, some code I wrote in github Issue)

Additional details

/host/src/main.rs

async fn my_async_fn() {
    do_something().await;
}

fn main() {
    let wasm = fs::read("../wasm32-unknown-unknown/debug/guest.wasm").unwrap();
    let store = Store::default();
    let module = Module::new(&store, wasm).unwrap();
    let instance = Instance::new(&module,&imports! {
        "async" => {
            "my_async_fn" => my_async_fn
        }
    }).unwrap();
    let func: NativeFunc<(), ()> = instance.exports.get_native_function("guest_fn").unwrap();
    func.call();
}

/guest/src/lib.rs

// this crate will be compile as wasm32-unknown-unknown

#[link(wasm_import_module = "async")]
extern "C" {
    async fn my_async_fn();
}

#[no_mangle]
extern async fn guest_fn() {
    my_async_fn().await;
}

[heyjdp]

This requires async support in Wasmer, this is planned for Wasmer 3.x

[heyjdp]

Work ongoing here: #1127