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From: glk01126@uxa.cso.uiuc.edu
Newsgroups: comp.sys.atari.st
Subject: Malloc(-1L), free memory...
Message-ID: <111500047@uxa.cso.uiuc.edu>
Date: 28 Oct 89 09:41:14 GMT
Lines: 58
Nf-ID: #N:uxa.cso.uiuc.edu:111500047:000:1455
Nf-From: uxa.cso.uiuc.edu!glk01126    Oct 27 06:42:00 1989



	Need help with the following code, I've been sweating it out
	for days, and can't understand why it works the first time it
	is called, but the second through nth times are iffy.  Sometimes
	free is set to 0, sometimes to a valid count of free mem div
	4.  Malloc(-1L) after the first time it is called, returns
	some value less than 4096, but the memory is available to be
	allocated by other parts of the program...

	HELP:
	*free is set to zero before call.

/*****************************
	Compute total free
	memory
*****************************/
freemem(free)
	int		*free;
	{
	long	kilo;

	if (Malloc(-1L)>4096L)
		{
		kilo = Malloc(4096L);
		if (kilo)
			{
			*free += 4;
			freemem(free);
			Mfree((char *)kilo);
			}
		}
	}

/*****************************
	Show free memory in
	disk dialog
*****************************/
dial_free(list)
	dualfile	*list;
	{
	int	free;
	free = 0;
	freemem(&free);
	sprintf(rs_object[rs_trloc[DISK]+MEMOFREE].ob_spec+2,"%4dK,  B:",free);
	sprintf(rs_object[rs_trloc[DISK]+MEMOLARG].ob_spec,"%ld\0",Malloc(-1L));
	sprintf(rs_object[rs_trloc[DISK]+MEMOFILES].ob_spec,"%d\0",
		dualcnt(dualfirst(list)) );
	dial_draw2(DISK,MEMOFREE,MEMOLARG);
	dial_draw(DISK,MEMOFILES);
	}

	( dial_draw simply redraws the object in the dialog box,
	  dial_draw2 redraws the rectangle encompassing item1 and item2 )

Thanks a lot if you have any ideas... I really am on the edge of smashing
something.  Using Laser C V2.0.
-Spieu!