Re: newbie inquiry

[Mark Johnson <mark_h_johnson@raytheon.com>]

Stephen Leake wrote:
> 
> "Steven Shaw" <steve.shaw@uq.net.au> writes:
> [snip]
> >     * ability to put data/objects into shared-memory for sharing between
> > processes
> 
> This is not in the Ada standard, nor in any other language standard,
> that I know of. I don't know of any language that has the notion of
> "process"; many have "task" or "thread", but they share an single
> address space.
> 
I am not sure if the OP meant "process" when he could have meant "Ada
task". If you replace process with Ada task, the answer becomes - yes,
Ada does support access to data and objects in shared memory (ARM
chapter 9). If they do mean process - then I agree with you.

>[snip]
> > Are there features in the spec that could/should be avoided?
> 
> No. Unless you are doing hard real-time, but that's not a language
> implementation issue.
> 
For the most part I agree as well. However, if you really care about
performance - you should probably measure it to determine what you
should or should not avoid. Each Ada compiler is a little different. One
may do exception processing well, another may do better task switching
and protected objects. 
  --Mark