Date:	Mon, 8 Jan 2001 09:45:23 +0200 (IST)
From:	Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
X-Sender:	eliz AT is
To:	"Mark E." <snowball3 AT bigfoot DOT com>
cc:	djgpp-workers AT delorie DOT com
Subject:	Re: valloc and memalign draft
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On Mon, 8 Jan 2001, Mark E. wrote:

> > > +   /* Temporarily clear chunk-in-use bit so macros work correctly.  */
> > > +   b1->size &= ~1;
> > 
> > Isn't this a bit dangerous?  Doesn't it leave the malloc chain in an 
> > inconsistent state, for a small window of opportunities?  What if some 
> > signal (i.e. exception) strikes between this line and where you restore 
> > the bit, and the code run from the signal handler calls memalign?
> 
> I hadn't thought of that. Would adding '& ~1' to BEFSZ, ENDSZ, etc. work for 
> you?

I think it's better.

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