Re: Is there a maximum contiguous memory allocation?

From:
Geoff <geoff@invalid.invalid>
Newsgroups:
microsoft.public.vc.mfc
Date:
Mon, 21 Dec 2009 18:28:33 -0800
Message-ID:
<bqa0j5ds19b0lhbiun3hj4vj30rsgqfmhb@4ax.com>
On Mon, 21 Dec 2009 19:38:14 -0600, "Peter Olcott"
<NoSpam@SeeScreen.com> wrote:

Yes so I have several alternatives.
(1) Conventional Windows like glyphs can easily be
recognized with (by today's standards) small amounts of RAM
(2) Complex glyphs such as those that Apple, PDF, and some
Unix systems have may sometimes exceed the limits of Win32,
and thus require a 64 bit OS. (it will sometimes require
std:vector::size() > 4.0 GB)
(3) The recognition of Asian glyphs will require a redesign
that will save memory at the cost of speed. I think that I
have the elements of this redesign figured out.


Unix or Windows, 32-bit OS means a hard limit on a single allocation:

#include <vector>
#include <iostream>

int main(int argc, char* argv[])
{
   using namespace std;
   vector <char> v1;
   vector <char>::size_type i;

   i = v1.max_size( );
   cout << "Maximum possible length of the vector is " << i << "." <<
endl;
   return 0;
}

OS X and Linux as 32 bit systems are constrained just as much as
Windows. You seriously need to examine your problem space and
partition it so your application isn't such a memory pig.

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