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From: barbarin@Xerox.com (Mike Barbarino)
Newsgroups: comp.lang.c++
Subject: TC++ problem w/huge arrays of struct?
Keywords: TC++; arrays; pointers; struct;
Message-ID: <678@roo.UUCP>
Date: 14 Dec 90 21:38:48 GMT
Sender: news@parc.xerox.com
Reply-To: barbarin@Xerox.com (Mike Barbarino)
Organization: Xerox PARC
Lines: 32

I'm having some problems with TC++ ... in particular with the following
sort of thing:

const DBSIZE = 31000;

struct weights {
   unsigned long   x;
   unsigned long   y;
   };

long memsize;
...
memsize = DBSIZE * sizeof(weights);
weights huge *accumulator =  (weight *)farmalloc(MEMSIZE);
...
for (int j=0; j<DBSIZE; j++, accumulator++) {
   accumulator->x = 255;
   if (accumulator->x != 255) ....
   ...
}
...

and so on...

In the IDE, using the debugger, I can trace over the assignment of the '255'  without
a watch on accumulator->x showing a change.  A check immediately after the assignment
shows no change.

By deleting an element in the structure (say y), recompiling, etc., the assignment
works.

What am I doing wrong?  Thanks in advance...