Creating epoll()able objects

Question

Is it possible to create an object that will support epoll()?

I assume the epoll_* system calls depending on a compatible system fd makes it difficult, if not impossible, to create an object with a compatible 'pseudo fd'- but thought I'd see if I was wrong. ( it happens :p )

Answer 1

Have the object write to one side of a pipe(2), and pass the other end to epoll.register(). Obviously the object can't run in the same thread and at the same time as epoll.poll(). But that still leaves other valid usescases.