Date:	Wed, 4 Jul 2001 09:30:56 +0300 (IDT)
From:	Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
X-Sender:	eliz AT is
To:	Matthew Conte <matt AT conte DOT com>
cc:	djgpp-workers AT delorie DOT com
Subject:	Re: malloc() problem, DJDEV 203
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On Tue, 3 Jul 2001, Matthew Conte wrote:

> > If that doesn't work, I think we can safely decline anything above 2GB,
> > which will avoid the signed/unsigned nuisance (inside malloc as well).
> 
> careful:  sbrk() will accept negative values.

Of course, it can: that's how you release memory to the system.  (Our
`sbrk' doesn't release memory, but it does support negative
arguments.)

But I don't understand the ``careful'' part: the fact that unsigned
values larger than 2GB can be interpreted as negative is _precisely_
the reason I suggested to stop at 2GB (Charles points out that 2GB
minus 64KB is a better value).  This number cannot be interpreted as a
negative one, so where's the problem?

Note that I was talking about arguments to `malloc', not to `sbrk',
and `malloc' doesn't allow negative arguments.  Did you perhaps think
that I was suggesting that `sbrk' fails for > 2GB?  If so, this is not
a problem with `malloc'.

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