From: "Mauricio Fernández" <batsman.geo@...>
Date: 2003-06-25T22:48:00+09:00
Subject: Re: collect info about ruby-api

On Wed, Jun 25, 2003 at 10:21:37PM +0900, Simon Strandgaard wrote:
> On Wed, 25 Jun 2003 22:57:53 +0900, nobu.nokad wrote:
> 
> >   #3   Init_stack(address)
> >        tell GC the machine stack limit.
> 
> I never heard about this before, what does it do ?
> Can you give me a more lengthy description of it :-)

The GC of Ruby is conservative: it will scan the stack to find VALUEs.
This means at any moment it can take the stack pointer and scan from
there to the beginning of the stack. Init_stack takes the address of one
local variable (in the stack) and records it as the bottom of the stack
(highest address in x86).

> 
> > grep Init_stack *.h
> >
> 
> It doesn't seems to something public available to the embedding/extension
> Rubyist's. To me it looks like an internal routine.

There's lots of functions not declared in the headers...

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