Function create_function

crates/c-api/src/func.rs:55–93

(
    store: &mut wasm_store_t,
    ty: &wasm_functype_t,
    func: impl Fn(*const wasm_val_vec_t, *mut wasm_val_vec_t) -> Option<Box<wasm_trap_t>>
    + Send
    + Sync
    + 'static,
)

}

unsafe fn create_function(
    store: &mut wasm_store_t,
    ty: &wasm_functype_t,
    func: impl Fn(*const wasm_val_vec_t, *mut wasm_val_vec_t) -> Option<Box<wasm_trap_t>>
    + Send
    + Sync
    + 'static,
) -> Box<wasm_func_t> {
    let ty = ty.ty().ty(store.store.context().engine());
    let func = Func::new(
        store.store.context_mut(),
        ty,
        move |_caller, params, results| {
            let params: wasm_val_vec_t = params
                .iter()
                .cloned()
                .map(|p| wasm_val_t::from_val(p))
                .collect::<Vec<_>>()
                .into();
            let mut out_results: wasm_val_vec_t = vec![wasm_val_t::default(); results.len()].into();
            let out = func(&params, &mut out_results);
            if let Some(trap) = out {
                return Err(trap.error);
            }

            let out_results = out_results.as_slice();
            for i in 0..results.len() {
                results[i] = out_results[i].val();
            }
            Ok(())
        },
    );
    Box::new(wasm_func_t {
        ext: wasm_extern_t {
            store: store.store.clone(),
            which: func.into(),
        },
    })
}

#[unsafe(no_mangle)]
pub unsafe extern "C" fn wasm_func_new(