Dan Kegel wrote:

>You can actually consider posix AIO using sigtimedwait() to pick up completion
>notices to fit the definition of completion port if you squint a bit.
>
Except that signal queues are far too short to be useful for c10k.  It's 
also not possible to allocate a queue (signal number) in a thread safe 
manner.

Posix AIO is a horrid interface.  Ben has done much better.