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From: chuck@umiami.ir.miami.edu (Chuck Urwiler)
Newsgroups: comp.sys.mac.programmer
Subject: THINK C's malloc(),free() help please
Message-ID: <1991Apr6.203939.8742@umiami.ir.miami.edu>
Date: 7 Apr 91 01:39:39 GMT
Organization: Univ of Miami Music Engineering
Lines: 33

I'm writing in THINK C on the Mac. I need to know just how malloc() 
(calloc() actually) and free() work. Right now, free() doesn't seem to be 
working. I pass it all the nodes of a list to free() and then I try a new 
malloc() and get a totally different pointer - why? Shouldn't I get a 
pointer down low in memory again, or at least one of the old pointers?
Maybe I just need to malloc() more stuff to see it work? That's not that
important. I just want to know that if I calloc() a bunch of nodes, and
then free() them, that I'm definitely freeing up the space the pointers
used. I'm not into my own memory management yet, but if this doesn't work
right, I guess I'm gonna hafta do my own. 

Any insightful comments, help, references, whatever - it would all be 
appreciated. And, since it seems this is a common misunderstanding on the 
net, maybe you should just go ahead and post replies. By the way, the THINK 
C manual says absolutely NOTHING about malloc() or free() or anything. Only 
a reference in the standard library manual.

By the way, if you're a THINK C programmer, I just got the new Mac 
Programming primer volume two - for those of you wondering about the memory 
manager and Text Edit, this is the book to buy. (but it doesn't say 
anything about malloc() !)

-Chuck-

-- 
   Chuck Urwiler    University of Miami Music Engineering   Voice & Keys  
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chuck@umiami -or @umiamivm  (Bitnet) |"Sometimes, the one thing that you're 
chuck@umiami.ir.miami.edu (Internet) | looking for, it's the last thing on 
chuck@miavax.ir.miami.edu (Internet) |  your mind"    -Robbie Nevil
curwiler                       (PAN) | 
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Disclaimer: I only work and learn at this University. I don't speak for it!