On Tue, May 21, 2013 at 01:46:13PM +0200, Jorge Acereda Maciá wrote:
> Hi,
> On May 21, 2013, at 7:46 AM, Alexander Burger <a...@software-lab.de> wrote:
> > The big question is: Will the system (which system?) do that? If so, how
> > do other languages implement green threads, coroutines or continuations?
> Some OSs do provide the required functionality (e.g, the fibers API on
> Windows). On POSIX, it's usually a matter of using some dirty hack
> (setjmp()/longjmp() being the most portable, swapcontext() is also quite

setjmp()/longjmp() is what PicoLisp basically does, though it is done
directly in assembly, not by using a library. In any case, the
underlying mechanisms (i.e. the logic of above/below the stack pointer)
are the same.

So this would mean we are on the safe side.

> The problem is so complex that perhaps your approach is the simplest.

Yes, in assembly it is almost trivial. But it doesn't help if the OS has
a different idea of what you're doing ;-)

> Just take a look at how nasty the thing can get:
> http://code.google.com/p/libaw/source/browse/coroutine/source/Coro.c


♪♫ Alex
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