Re: Large arrays (again), problem case for GNAT

[Jeffrey Carter <spam@spam.com>]

Dr. Adrian Wrigley wrote:

>    function GetSomeMemory (X : Integer) return Big_A;
>    pragma Import (C, GetSomeMemory, "malloc");

This isn't Ada, and how well this works is going to depend on the 
compiler and on the implementation of malloc used. Some compilers do not 
represent access values in the same way as C pointers (unless Convention 
C is specified), so this would fail miserably on them.

With GNAT and gcc, obviously, you get something semi-useful; the fact 
that it fails sometimes indicates that perhaps you shouldn't be doing 
this. Maybe you should use a Convention-C array and use C functions to 
access the elements.

-- 
Jeff Carter
"Apart from the sanitation, the medicine, education, wine,
public order, irrigation, roads, the fresh water system,
and public health, what have the Romans ever done for us?"
Monty Python's Life of Brian
80