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Date: Mon, 04 Mar 2002 21:17:04 +0200
From: "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>
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In-reply-to: <3C8359F4.FC5CEE88@yahoo.com> (message from CBFalconer on Mon, 04
	Mar 2002 06:26:44 -0500)
Subject: Re: Malloc/free DJGPP code
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> Date: Mon, 04 Mar 2002 06:26:44 -0500
> From: CBFalconer <cbfalconer AT yahoo DOT com>
> 
> It allows full access to the quiescent status, including the free
> memory chains.  From any allocated memory it can follow the chains
> to all contiguous memory (which are broken by any unexpected
> sbrk).  It does NOT allow inserting 'callbacks' in the malloc,
> free, realloc calls, although I can conceive of that being
> feasible.  Any such would involve additional overhead.

The calls to such hooks could be via function pointers, only if they
are non-NULL.  If they are set to NULL by default, the overhead is
just a simple test.