From:	"raelenekelly1" <raelenekelly1 AT bigpond DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Alocating Memory to a Referenced Pointer!
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Message-ID:	<k7rX8.33294$Hj3.100060@newsfeeds.bigpond.com>
Date:	Fri, 12 Jul 2002 12:34:29 +1000
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

Hi all..

Myself and a few other posts on this newsgroup in the past have
had trouble allocating memory to a pointer passed by reference.

reference:
    ->'graphics programming: need help with debugging; 8/7/02 post
    ->and my 3d engine
both become unstable if you use external functions to allocate memory!

e.g.

int F_Allocate_Mem(char *v_string)
{
    v_string=(char *) malloc (200 *sizeof(char));
};

void main ()
{
    char * BigStringVariable;
    int response;
    response=F_Allocate_Mem(&BigStringVariable);
    exit(0);
};

This is the kind of setup im talking about!

It seems to me that although v_string and
BigStringVariable both point to the same
memory location at the start of the
F_Allocate_Mem function, only the memory
location of v_string would be reassigned by malloc.

If this is so, then how can i assign memory to a pointer
using an external function?

at the moment i steer round the problem by using class's
but even that can become unstable at times!

by ustable i mean - Sometimes the function works and i can
use the allocated memory. Other Times you can't.

Any Thoughts /  Suggestions would be much appreciated !

....MickyDe

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