Regarding userland threads [...] there are several implementations on linux by different names that accomplish the same goal This is a really good list: http:/

Regarding userland threads [...] there are several implementations on linux by different names that accomplish the same goal This is a really good list: http://www.gnu.org/software/pth/related.html http://www.gnu.org/software/pth/related.html Many of these projects are dead or unmaintained, but there are a few worth paying attention to (notably Gnu Pth itself). In any case, the problem isn't too difficult - it took Dan a month to do it, and that includes patching various open source components to fix performance issues and adapting our existing codebase to use proper programming style (this took a significant chunk of the time).