* ACE functionality in Ada @ 1999-05-13 0:00 Larry Hazel 1999-05-13 0:00 ` dennison 0 siblings, 1 reply; 5+ messages in thread From: Larry Hazel @ 1999-05-13 0:00 UTC (permalink / raw) Does anyone know anything about ACE (Adaptive Communications Environment)? There is a web page at http://www.cs.wustl.edu/~schmidt/ACE.html. I've been given the job of trying to build this on a Solaris system. Possible use in Army C3I systems. I'm hoping someone will post - "Why use ACE when XXX does everything ACE does and more and it's all Ada." --== Sent via Deja.com http://www.deja.com/ ==-- ---Share what you know. Learn what you don't.--- ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: ACE functionality in Ada 1999-05-13 0:00 ACE functionality in Ada Larry Hazel @ 1999-05-13 0:00 ` dennison 1999-05-13 0:00 ` Larry Hazel 0 siblings, 1 reply; 5+ messages in thread From: dennison @ 1999-05-13 0:00 UTC (permalink / raw) In article <7heqc9$bj8$1@nnrp1.deja.com>, Larry Hazel <lhazel@mindspring.com> wrote: > Does anyone know anything about ACE (Adaptive Communications > Environment)? There is a web page at > http://www.cs.wustl.edu/~schmidt/ACE.html. I've been given the job of > trying to build this on a Solaris system. Possible use in Army C3I > systems. > > I'm hoping someone will post - "Why use ACE when XXX does everything ACE > does and more and it's all Ada." It seems to be a project to develop a set of C++ networking patterns. The Ada pattern archive at http://info.acm.org/sigada/wg/patterns/patterns/index.html may have some of them. Then again, I suspect using an Ada compiler that supports Annex E (distributed systems) would be an easier solution. -- T.E.D. --== Sent via Deja.com http://www.deja.com/ ==-- ---Share what you know. Learn what you don't.--- ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: ACE functionality in Ada 1999-05-13 0:00 ` dennison @ 1999-05-13 0:00 ` Larry Hazel 1999-05-15 0:00 ` Bryce Bardin 0 siblings, 1 reply; 5+ messages in thread From: Larry Hazel @ 1999-05-13 0:00 UTC (permalink / raw) In article <7heuhk$f1m$1@nnrp1.deja.com>, dennison@telepath.com wrote: > In article <7heqc9$bj8$1@nnrp1.deja.com>, > Larry Hazel <lhazel@mindspring.com> wrote: > > Does anyone know anything about ACE (Adaptive Communications > > Environment)? There is a web page at > > http://www.cs.wustl.edu/~schmidt/ACE.html. I've been given the job of > > trying to build this on a Solaris system. Possible use in Army C3I > > systems. > > > > I'm hoping someone will post - "Why use ACE when XXX does everything > ACE > > does and more and it's all Ada." > > It seems to be a project to develop a set of C++ networking patterns. > The Ada pattern archive at > http://info.acm.org/sigada/wg/patterns/patterns/index.html may have some > of them. Then again, I suspect using an Ada compiler that supports Annex > E (distributed systems) would be an easier solution. The features of the distributed systems annex would be great. But, I thought it was defined for a homogeneous network using the same compiler on all nodes. If it will work with nodes of different cpu, OS, compiler, it would solve all our networking problems. --== Sent via Deja.com http://www.deja.com/ ==-- ---Share what you know. Learn what you don't.--- ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: ACE functionality in Ada 1999-05-13 0:00 ` Larry Hazel @ 1999-05-15 0:00 ` Bryce Bardin 1999-05-16 0:00 ` Robert Dewar 0 siblings, 1 reply; 5+ messages in thread From: Bryce Bardin @ 1999-05-15 0:00 UTC (permalink / raw) Larry Hazel wrote: <snip> > The features of the distributed systems annex would be great. But, I > thought it was defined for a homogeneous network using the same compiler > on all nodes. If it will work with nodes of different cpu, OS, > compiler, it would solve all our networking problems. The main thing that is required for distributed use in a heterogeneous network is to make the message format architecturally neutral (and the same for every node). One way to achieve that is to use a textual form, which is what GLADE does. The compiler must generate the same format for the messages regardless of the architecture of the target, which is achieved by using the same compiler (gnat) for each target. ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: ACE functionality in Ada 1999-05-15 0:00 ` Bryce Bardin @ 1999-05-16 0:00 ` Robert Dewar 0 siblings, 0 replies; 5+ messages in thread From: Robert Dewar @ 1999-05-16 0:00 UTC (permalink / raw) In article <373D89CE.C09BCDB2@home.com>, bbardin@home.com wrote: > The main thing that is required for distributed use in a > heterogeneous network is to make the message format > architecturally neutral (and the same for every node). One > way to achieve that is to use a textual form, which is what > GLADE does. The compiler must generate the same format > for the messages regardless of the architecture of the target, > which is achieved by using the same compiler (gnat) for each > target. Several points. First, yes, the GLADE/GNAT combination fully supports heterogenous distribution. No, this feature is not required by the RM. It is fair to say that the RM was designed primarily with the intention of supporting homogenous distribution, but in practice we have found no respect in which the definition inteferes with full heterogenous distribution. There are some slight difficulties that appear if multiple highly incompatible versions of Standard are around (e.g. an Integer in one implementation may be out of range of an Integer in another implementation), but by following the (in any case desirable) approach of avoiding implementation dependent types in Standard, this problem is eliminated. As for "using a text format", that's a bit misleading. The only requirement is that an architecture neutral format be used for streams. In the case of GNAT/GLADE, for heterogenous distribution, the format used is XDR (which is an international standard for architecture neutral representation of internal computer data). As for "using the same compiler (gnat) for each target", it is not at all clear that this is necessary in theory, since it is quite possible in practice for another compiler to be compatible with the XDR formats used by GNAT. Of course in real life, so far, the only implementation that supports Annex E is GNAT, so using any compiler that supports Annex E and using GNAT mean the same thing at the moment! Robert Dewar Ada Core Technologies --== Sent via Deja.com http://www.deja.com/ ==-- ---Share what you know. Learn what you don't.--- ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~1999-05-16 0:00 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 1999-05-13 0:00 ACE functionality in Ada Larry Hazel 1999-05-13 0:00 ` dennison 1999-05-13 0:00 ` Larry Hazel 1999-05-15 0:00 ` Bryce Bardin 1999-05-16 0:00 ` Robert Dewar
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