From:	"Rafael García" <rafael AT geninfor DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	negative sbrk(0)
Date:	Mon, 25 Sep 2000 17:50:04 +0200
Organization:	Telefonica Transmision de Datos
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

Hello all. Today a question about sbrk(). I have this function to know free
memory:

long availmem(void) {
   static long initially=0;
   long limit;
   static long initial_limit;
   long burnt;

   if (!initially) {
      initially=_go32_dpmi_remaining_physical_memory();
      assert(initially>0);
      }
   if (!initial_limit)
      initial_limit=(long)sbrk(0);

   limit=(long)sbrk(0);
   burnt=limit-initial_limit;
   return initially-burnt;
   }


Well, I have got sbrk(0) to return negative values in some cases, so the
function tells I have -1950Kb.
Anybody has a solution?

Thanks

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