Re: Ada 95 based RTOS

["Marin D. Condic" <mcondic-nospam@quadruscorp.com>]

xaplos@my-deja.com wrote:
> I'm fairly new to the Ada language and have spent a lot of time reading
> how Ada is superior to C/C++ in design and safety. I'm currious if
> someone can explain why there are so many RTOS based on C/C++ and "none"
> (I mean easily and freely available) based on Ada. With Ada's real-time
> annex and other language features, one would think an Ada-based
> kernel/run-time would be superior to others.

In many realtime and embedded applications, the tradition has been for
the Ada compiler to provide a runtime kernel which implements the
tasking primitives and similar features needed to make the code run on a
bare machine. This is a little different than the tradition with C/C++
compilers that rode on top of Unix (and others) and someone else would
provide a plug-compatible kernel as a separate piece. Many Ada compilers
have been targeted to unique hardware or somewhat obscure processors so
an RTOS would have been hard to develop that fit all those niches. Hence
reliance on a compiler provided RTK.

You may discover that there are Ada compilers out there which target
your favorite C/C++ based RTOS. An RTOS is, after all, nothing more than
another operating system. Just as you can target many languages to Unix,
you can target Ada to run on top of any RTOS. Check with some of the
compiler vendors. There are links to many of them on my web page.

MDC
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