[Python-ideas] yield from multiple iterables (was Re: The async API of the future: yield-from)

[Greg Ewing]

Guido van Rossum wrote:

> The reason we can't ignore IOCP is that it is apparently the *only*
> way to do async I/O in a scalable way. The only other polling
> primitive available is select() which does not scale.

There seems to be an alternative to polling, though. There are
functions called ReadFileEx and WriteFileEx that allow you to
pass in a routine to be called when the operation completes:

http://msdn.microsoft.com/en-us/library/windows/desktop/aa365468%28v=vs.85%29.aspx
http://msdn.microsoft.com/en-us/library/windows/desktop/aa365748%28v=vs.85%29.aspx

Is there some reason that this doesn't scale either?

-- 
Greg