the same author actually has a tutorial on how to write green threads yourself <a href="http:&#x2F;&#x2F;c9x.me&#x2F;art&#x2F;gthreads&#x2F;intro.html" rel="nofollow">http:&#x2F;&#x2F;c9x.me&#x2F;art&#x2F;gthreads&#x2F;intro.html</a>