Re: [Ada] implement many new Ada 2005 features

["Randy Brukardt" <randy@rrsoftware.com>]

"Colin Paul Gloster" <Colin_Paul_Gloster@ACM.org> wrote in message
news:Pine.WNT.4.62.0502271630490.-706617@PC3...
> On Thu, 17 Feb 2005, Randy Brukardt wrote:
>
> "[..]
>
> Certainly, Janus/Ada is not going to compete in every environment with
GNAT
> (it's certainly not suitable for hard real-time work, for instance), [..]
>
> [..]"
>
> However you do have the capability to port your cross development tools to
> target an 8bit processor don't you? Some decade I may want to fund a
> compiler for some poorly supported target I might be stuck with, and I
> might get worried if you could not do a realtime executive for me.

Real-time, yes. Hard real-time, I don't think so.  The primary issue is that
hard real-time systems usually need strict control over memory management as
well. Janus/Ada generally uses dynamic allocation (heap, that is) for
anything not statically sized, which (because of code sharing) includes
function calls and pretty much anything in generics. So writing sane Ada
code that completely avoids dynamic allocation is nearly impossible with
Janus/Ada, and that would make it inappropriate for some purposes. (We'll
probably eliminate some of the dynamic cases from function calls when we
implement extended return statements, and our optimizer already eliminates
many more, but I don't think that the general issue will disappear. Of
course, with enough money, anything is possible...)

                         Randy Brukardt.