In article <26471@imag.imag.fr>, bessiere@imag.fr (Pierre Bessiere) writes:
|> We are willing to develop a sensor simulator in order to test embedded
|> .....
|> ....  C++ must be used. So the issue is: C++ is NOT at the time being
|> a real-time language. This raise some tricky questions:
|>
|>  - Availability of Real Time oriented C++ class (process class,
|>    asynchronous message receive/sender class, ...)?
|>
|>  - Orthogonality between inheritance and Real Time features?
|>
|>  - Parallel oriented AND object-oriented design methods?
|>
|>

 C++ and real time will be an interesting (as in the Chinese proverb) combination.
In addition to the issues noted above you also have:

 -- The implicit invocation of constructors when temporaries are created

 -- compiler depenedent ordering of initialization of inherited classes

 -- implicit type conversions via inheritance

 -- maintaining real-time timing with polymorphic objects (i.e. late binding)

 Not necessarily impossible (actually I'd like to see it happen),  just interesting...

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We are willing to develop a sensor simulator in order to test embedded
realtime systems. Due to high performances needed, we have to target
real-time operating system (Lynx for instance). Due to normalization
constraints, C++ must be used. So the issue is: C++ is NOT at the time being
a real-time language. This raise some tricky questions:

 - Availability of Real Time oriented C++ class (process class,
   asynchronous message receive/sender class, ...)?

 - Orthogonality between inheritance and Real Time features?

 - Parallel oriented AND object-oriented design methods?

Any answers to theses questions will be a great help!

As ususal, please answer to my personnal E-mail adress (bessiere@imag.imag.fr),
I will gather the answers and send this material to the concerned news-groups.