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From: wallace@ynotme.enet.dec.com (Ray Wallace)
Newsgroups: comp.lang.c
Subject: Re: malloc, a temporary variable, and a linked list (what happens)
Message-ID: <2062@engage.enet.dec.com>
Date: 19 Sep 90 19:30:41 GMT
Sender: news@engage.enet.dec.com
Organization: Digital Equipment Corporation
Lines: 23


In article <20319@orstcs.CS.ORST.EDU>, duvalj@bionette.cgrb.orst.edu (Joe Duval) writes...
>What I really want to know is what happens to the variable temp each time it
>is malloced?  Does it end up taking up a whole lot of memory or does the
>earlier malloced memory get lost?  How would I free this?

>			temp = (linelist *) malloc (sizeof(linelist));
>			indata[lines].points = temp;  /* retain the top of the list */

You don't want to free the memory that temp is pointing too. The memory is
being used to create your list, via indata[lines].points and
indata[lines].points->next which keep track of the malloc'ed address'.

If at some point you are done using the data from one or all of the lists
pointed to by indata[], then you could walk through each of the lists
(backwards) and free the memory.

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Ray Wallace		
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