[max_k]

> Would you consider adding a kqueue implementation?

Can't do, I don't have Apple or BSD anywhere. But if code for it were submitted to me, I would gladly merge it (and try to keep the CI happy).

The MPD version of the event loop is portable and runs on macOS/BSD/Windows, but no kqueue, only poll() (and select() on Windows). This old-school API has its scalability problems, of course, but that matters not so much for MPD.

The event loop can already do Coroutines on all supported targets; here's another open source project where I use this library: https://github.com/XCSoar/XCSoar/tree/master/src/event/ - it's a flight computer (yes, for real airplanes) which also runs on Windows and macOS and iOS, and runs libcurl (and other stuff) as coroutine.

If you want to use my library and need help with integrating it or with adding kqueue support, get in touch with me.