Richard Kelsey <xxxxxx@s48.org> writes: > The proposed SRFI works fine with threads, as long as those > threads do not require interrupting the C code at arbitrary > points. That's not threads. See jimb's post from a while back. Look, the problem here is easy: 1) Your SRFI demonstrably loses on certain kinds of implementations; 2) There is a minor change which will make it not lose. Why on earth not prefer number (2)???? Thomas