From:	y0000980 AT rzrtr1 DOT rz DOT tu-bs DOT de (Andree Borrmann)
Newsgroups:	comp.os.msdos.djgpp
Subject:	dpmi_discard_page_content
Date:	3 Dec 1996 17:21:47 GMT
Organization:	Technische Universitaet Braunschweig, Germany
Lines:	27
Distribution:	world
Message-ID:	<581njb$1su@ra.ibr.cs.tu-bs.de>
NNTP-Posting-Host:	rzrtr1.rz.tu-bs.de
Keywords:	dpmi, malloc
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Hi!

Some of my programs need temporarly huge amount of memory. When I malloc e.g. 
8 megs (I said huge!) and then free them, the memory-system starts to swap
the pages (full of crap no longer needed) out to disc (they are in the 
"internal-memory-pool") I think thatīs somewhat ineffeciently...
So I want to patch the malloc/free routines to be somewhat more intelligent.
So hereīs my question:

What exactly does the __dpmi_discard_page_content function?

Does it free (from dpmi-allocated) the page (I hope not...)?

Or does it just pretend that crap will be swapped out to disc?


Second question:

Is this function implemented in CWSDPMI ? 

(Itīs not in PMODEDJ for sure - without virtual memory ... by the way:
the algorithm malloc uses are for a virtual memory system... so better donīt 
use PMODEDJ or CWSDPR0 if Your program uses lot of mallocīs...)

Bye,
Andree

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