Is it possible to abort a component function call without fueling mechanism?

[sammyne]

Given host utils fn as

interface greeter{
  greet: func();
}

which will be implemented by Host, and called by someone else's fn hello-world.

When calling hello-world with Func::call_async, are there APIs to quit within greet's body without returning hello-world fn, but returning directly to Func::call_async.

[alexcrichton]

You can also use Config::epoch_interruption but those are the only two implemented methods of interrupting executing WebAssembly code. If you only need to interrupt the host, and not the guest, you can just use async without fuel/epochs.