[Stackless] can it be done with setjmp/longjmp?

[Christian Tismer]

Sam M. Rushing wrote:

> I'm wondering if what you're doing can't be done with setjmp/longjmp.
> 
> I've found several user-threads libraries that get by with just setjmp
> (as opposed to assembly code):


...


Yes, I'm pretty sure it is possible.
To unwind the stack, I can use setjmp/longjmp.
To rebuild it, I can use alloca.

This technique is a little more expensive, and
it is a bit tricky, but I think to provide
such an option as a fallback solution.

Still tricky is how to compute stack sizes,
without abusing knowpedge about the setjmp
implementation.

ciao - chris

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