Don't have an example, but I've come to really like kqueues (Freebsd's equivalent to an epoll). I heard they were ported to linux as part of getting GCD to run

Don't have an example, but I've come to really like kqueues (Freebsd's equivalent to an epoll). I heard they were ported to linux as part of getting GCD to run on it, but I haven't done any research on it.