Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!purdue!haven!adm!smoke!gwyn
From: gwyn@smoke.BRL.MIL (Doug Gwyn)
Newsgroups: comp.lang.c
Subject: Re: Coroutines in C
Message-ID: <10861@smoke.BRL.MIL>
Date: 28 Aug 89 17:59:55 GMT
References: <214@castle.ed.ac.uk> <5899@ficc.uu.net>
Reply-To: gwyn@brl.arpa (Doug Gwyn)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 7

In article <5899@ficc.uu.net> peter@ficc.uu.net (Peter da Silva) writes:
>If this implementation is used, it should be possible to create
>a fake stack frame and register set in a jmp_buf and tranfer control to it
>using longjmp.

You need separate (non-overlapping) stacks, not just a stack frame.
Otherwise the coroutines will step on each other's <DELETED>.