From:	"John M. Aldrich" <fighteer AT cs DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: malloc & free
Date:	Tue, 31 Mar 1998 18:54:23 -0500
Organization:	Two pounds of chaos and a pinch of salt.
Lines:	24
Message-ID:	<3521822F.6B13@cs.com>
References:	<352140E9 DOT D07CEE53 AT krona DOT obninsk DOT ru>
NNTP-Posting-Host:	ppp225.cs.com
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Denis V.Sorokovik wrote:
> 
> Here is my problem. I write program, that works with memory arrays and
> allocates arrays dynamically. I'm calling malloc(size), working with
> array, then freeing (free(ptr)). dpmi function
> __dpmi_get_free_memory_information says, that largest available free
> block in bytes didn't increases in size, when I freed array, and
> total_number_of_free_pages decreased too. I use DJGPP 2.01, cwsdpmi 4.
> Can anybody helps me with this question?

The answer is quite simple:  DJGPP's malloc()/free() does not return
freed memory blocks to the system; it keeps track of them for possible
reuse later.  At program termination, all allocated memory is returned
to the DPMI host.

-- 
John M. Aldrich, aka Fighteer I <fighteer AT cs DOT com>  UIN# 7406319

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