Funny. I've implemented something like this as well, but over `poll()`, and I made it handle child processes too. I could probably change it to use io_uring an

Funny. I've implemented something like this as well, but over `poll()`, and I made it handle child processes too. I could probably change it to use io_uring and kqueue on those platforms, but I wanted to make a POSIX-compatible version first.