Re: Posix.4 memory mapping from Ada programs

["David C. Hoos, Sr." <david.c.hoos.sr@ada95.com>]

I have been using memory mapping for some years now with VADS on SGI
platforms.  We have always used a constrained (two-dimensional) array type,
though.  The array dimensions are computed at run-time based on the known
dimensions and the array element type associate with the file, and the
required type is declared in a local declare block.
These files have been up to 500+ Mb. in size, and all works as expected.
The Ada interface is based in pragma interface to the underlying mmap, and
associated c- library.

Although this particular code has not yet been ported to Ada95, I see no
reason why it would not work, as long as you stick to constrained arrays.  

Hope this helps

David C. Hoos, Sr.

http://www.ada95.com

billimad <billimad@vanuata.dcs.gla.ac.uk> wrote in article
<5kname$iv7@singer.cent.gla.ac.uk>...
> I have been trying to use the Posix.4 memory mapping functions from an
> Ada program, but without total success. I have managed to successfully
> map static arrays but have been having more problems trying to map
> access to array types.