Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!motcid!dyer
From: dyer@cell.mot.COM (Bill Dyer)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Microsoft C 5.1 memory fragmentation problem
Message-ID: <705@mica2.UUCP>
Date: 9 Jan 90 15:44:15 GMT
References: <1990Jan1.211844.10550@ns.network.com>
Organization: Motorola Inc. - Cellular Infrastructure Div., Arlington Heights, IL 60004
Lines: 24

In article <1990Jan1.211844.10550@ns.network.com> ddb@network.com (David Dyer-Bennet) writes:
>I'm sure I remember seeing references to this problem in various
>places:  when I do a LOT of malloc and free using the library routines
>from Microsoft, I get my heap mongo fragmented, because they don't
>merge adjacent free space.  (This is obviously a bug, but never mind
>that now....)  I vaguely remember that Microsoft has published some
>code to do this merging, that one can put into a program and call when
>needed.  Can anybody give me a pointer to code to merge adjacent free
>space in the Microsoft heap, or code for a whole new malloc that will
>work in the Microsoft C environment?  Anon ftp location would be fine,
>or mail it to me maybe if it's small.
>
>Thanks!

There is a book called Advanced C Tips and Techniques that has a whole chapter
dedicated to the development of a heap manager.  It includes the complete
source listing.  The complete reference is:

Advanced C - Tips and Techniques
Paul Anderson and Gail Anderson
Stephen G. Kochan and Patrick H. Wood eds.
Hayden Books, Indianapolis, Indiana

This is also a great book on C in general.  Hope this helps.