I think it's as naturally async as anything else here actually. If you're calling a function via IPC over shared memory, you're sending a message, signalling it's there to the other process, and waiting for a response message with the result.
The only thing needed to turn this async is to change the "get result over IPC" function from "block until result is available" to "check if result is available, return TRY_AGAIN if it's not"
The only thing needed to turn this async is to change the "get result over IPC" function from "block until result is available" to "check if result is available, return TRY_AGAIN if it's not"