FWIW, either async-channel's types or flume's async APIs should work for your use case. Both are completely agnostic to the async runtime, since the futures are

FWIW, either async-channel's types or flume's async APIs should work for your use case. Both are completely agnostic to the async runtime, since the futures are triggered by internal events (recv() waits for send() and vice versa), rather than external events like I/O which are generally coordinated through the runtime.