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From: David_Anthony_Guevara@cup.portal.com
Newsgroups: comp.sys.mac,comp.sys.mac.programmer
Subject: Novice Programmer Question:  Dynamic Memory Allocation under TC
Message-ID: <24770@cup.portal.com>
Date: 7 Dec 89 02:08:50 GMT
Distribution: usa
Organization: The Portal System (TM)
Lines: 20

I have a very novice Mac programming problem.  I wrote a program for
a C class I'm taking that uses linked lists.  The program runs fine
on my VAX at work, but when I run it on my Mac under TC 4.0, it gets
"lost".  My question(s) is(are):  When you use malloc to create a
node (ex:  head = (struct linked_list *) malloc (sizeof( ELEMENT ));)
does the memory allocated come from the stack or the application heap?
I believe my problem is that the Mac is relocating my pointers and the
program just drops into a black hole.  No bomb, but it just sits there
until I reset the system.  If the storage is allocated from the application
heap, how can I make sure that nothing gets moved while the program is
running?  I'm not using any toolbox calls, should I be?  As I said, the
program DOES run on my VAX without any difficulty.  My configuration is
a Mac Plus w/4Mb RAM, Think C 4.0, System 6.02 with assorted inits and cdevs.
Thanks for any help you can give me!

	Dave Guevara,
	Internet:  guevara@fsd.arc.nasa.gov
                   guevara@fsdvx2.arc.nasa.gov
                   David_Anthony_Guevara@cup.portal.com