Re: C++ for Embedded Systems.

From:
"Alf P. Steinbach" <alfps@start.no>
Newsgroups:
comp.lang.c++.moderated
Date:
30 Sep 2006 10:57:53 -0400
Message-ID:
<4o6ulpFdd8d1U1@individual.net>
* Jiang:

However, interesting enough, I do not know any OS uses [C++]
exception for error handling. Symbian uses its own Leave/TRAP,
and standard exception shall be disabled to compile its
applications.

Any thoughts about this issue?


It's useful to note that this problem of compatibility between OS
machine code conventions and language features, covers much more than
exceptions.

E.g., it covers data types, function calls and component interfaces.

Exceptions are somewhat exceptional (heh) because at the language level
they can be extremely complex compared to e.g. simple function calls.

Thus, modelling OS exceptions on exceptions in any given language could
drag in much of that language.

Just my 3 cents: Windows exceptions (called SEH exceptions) are
generally used for situations that constitute undefined behavior in C++,
such as dereferencing a nullpointer, and are otherwise optional, so
while some C++ compilers, notably Microsoft's own, support translation
from SEH exceptions to C++ exceptions, such support is non-essential.

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