Function one_poll

crates/wasmtime/src/runtime/vm.rs:481–487

Attempts one poll of `f` to see if its output is available. This function is intended for a few minor entrypoints into the Wasmtime API where a synchronous function is documented to work even when `async_support` is enabled. For example growing a `Memory` can be done with a synchronous function, but it's documented to panic with an async resource limiter. This function provides the opportunity t

(f: F)

/// message should be generated recommending to use an async function (e.g.
/// `grow_async` instead of `grow`).
fn one_poll<F: Future>(f: F) -> Option<F::Output> {
    let mut context = Context::from_waker(&Waker::noop());
    match pin!(f).poll(&mut context) {
        Poll::Ready(output) => Some(output),
        Poll::Pending => None,
    }
}