kern/99979: Get Ready for Kernel Module in C++
olli at lurza.secnetix.de
Wed Jul 12 16:08:05 UTC 2006
Rick C. Petty <rick-freebsd at kiwi-computer.com> wrote:
> pfgshield-freebsd at yahoo.com wrote:
> > C++ is the de-facto standard for OO
> That is just sad. So many other languages do a much better job of
> implementing OO (Smalltalk, Java, Python, even Scheme).
That's true. At OOPSLA '97, Alan Kay (an OO pioneer) said:
"I made up the term 'object-oriented', and I can tell you I
didn't have C++ in mind."
However, none of the languages you mentioned is really well-
suited for FreeBSD kernel development.
Just for the record, there are a lot of C-like languages
that could be used, in theory. For example Objective-C
(which has a nice, Smalltalk-like OO implementation, and
it is even completely backwards-compatible to C). Another
neat language is Cyclone ( http://cyclone.thelanguage.org ),
which is intended to be a "safe" dialect of C, because it
prevents buffer overflows, dangling pointer accesses etc.,
and even has modern features such as pattern matching and
type inference, and it even borrowed a few things from C++
(it uses gcc as the backend and is easy to interface with
standard C code).
Note that I do _not_ imply to actually use any of the above
mentioned languages for FreeBSD kernel programming. Perso-
nally I prefer to stick with plain C.
> I'm all for making kernel code free of C++ reserved words (although I'd
> recommend changing "new" to "new_obj", etc. instead of "_new" or similar).
> This would allow C++ developers to write drivers and such. But I don't
> feel there is any benefit to commit C++ code into the "pristine" kernel
The biggest problem is that using C++ code in the kernel
would reduce the number of potential maintainers signifi-
cantly. It would also make debugging more difficult,
especially for non-experts who try to submit useful PRs.
That's a very important point to consider.
Just my 2 cents.
Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing
Dienstleistungen mit Schwerpunkt FreeBSD: http://www.secnetix.de/bsd
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