[andreasgonewild]

Been there, done that :) It's a neat trick, but the issue for me is that you still need to pass a separate struct for state which breaks the illusion enough that you might as well just write an ordinary iterator.

[kindfellow92]

I agree. If you want user-level threading, just use a stack swapping library like libpth.

[kosma]

Most well-written portable interrupt code needs to pass an explicit context anyway, so... it's not as bad as it sounds.