We use C++ and Qt for our GUI. We use C for the RTLinux part. We are happy.
----- Original Message ----- From: "Calin A. Culianu" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, March 15, 2002 11:38 AM Subject: RE: [rtl] (RT) C++ why you should use it > > Personally I like the asceticism imposed by doing straight C in the > kernel. It makes me feel like I am Ken Thompson himself back in '71. > > In fact, to get the full effect, I like to hook up my linux workstation to > a teletype machine (basically a printer terminal) and program using the ed > editor. This way I am forced to pack as much code as possible on one > source line (much like Ken did when he worked on Unix -- have you seen how > strangely formatted his code was?). It makes you feel cool. > > > -Calin > > > "C is for children. Real men program in Haskell." > > > > On Fri, 15 Mar 2002, > Steven Seeger wrote: > > > The GUI for my project is OO. I created a whole library and it implements a > > system for receiving X/Y coordinates from any device (in one case, a touch > > panel) and dispatches events to certain objects on screen. Objects can be > > buttons (that change image when you press them) and pulldown menus and > > sliders and whatever. I even used this to do an on screen keyboard for one > > system. It works very nicely, and the code is being used in more than one > > project. > > > > What we use RTLinux for here is running feedback control systems. That's the > > only experience I've had with it, so I don't see any reason to use C++ for > > that. > > > > Steve > > > > >-----Original Message----- > > >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of > > >[EMAIL PROTECTED] > > >Sent: Friday, March 15, 2002 1:16 AM > > >To: [EMAIL PROTECTED] > > >Subject: [rtl] (RT) C++ why you should use it > > > > > > > > >What a constructive discussion this is. I just have to contribute: > > > > > >Steve says it is obvious for which programming language (C or C++) you > > >SHOULD choose. However he just makes one argument-like > > >statement: "the GUI > > >was done in C++ with reusable code". And in contrast to this > > >argument the > > >language of choice should be C. > > > > > >Well I have chosen C++ for my project, because with this language it is > > >possible to implement an OO-design. And we have all heard of > > >the advantages > > >of OO-development: > > >- Reusable (if correctly implemented) > > >- Easier to maintain. > > >- etc. > > > > > >Unfortunately I have not read the "Does OO Synch with How We > > >Think?" paper. > > >However I'm not impressed by the conclusion of the author (who wrote it > > >anyway?). There are, as I see it, two possibilities for "the > > >greater demand > > >for long term memory": > > > > > >The first is the re-use of source-code. It is off course ridiculous to > > >think that the writer of a particular piece of software will > > >be the sole > > >person to reuse the source-code. So create a well documented > > >OO-design and > > >implement it accordingly. This should make it easy for > > >everybody, including > > >the writer, to understand the code. And makes the use of long > > >term memory > > >redundant. > > > > > >The second use of long term memory is in a large project where > > >you create > > >tons of code over a period of a few years. However this can also be > > >remedied by a good OO-design and implementation. Use of code a > > >few years > > >after it is implemented resembles re-use very closely. > > > > > >So make an OO-design and implement it in an OO-language like > > >C++. These > > >rules apply to all projects, so the choice between C++ and C for your > > >RTLinux project should be obvious. Choose C++ ! > > > > > > > > >Albert > > > > > >> For my project at work, the GUI was done in C++ with reusable code > > >> modules like bitmap objects, labels, text boxes, sliders, pulldown > > >> menus, etc. The RTLinux modules were all done in straight C. > > >I thought > > >> it was obvious which to do. > > >> > > >> Steve > > >> > > >>>-----Original Message----- > > >>>From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On > > >Behalf Of > > >>>Christopher D. Carothers > > >>>Sent: Wednesday, March 13, 2002 1:25 PM > > >>>To: [EMAIL PROTECTED] > > >>>Cc: [EMAIL PROTECTED] > > >>>Subject: Re: [rtl] Re: RT C++ and why more people don't use it. > > >>> > > >>> > > >>> Hi all -- let me fan the flames a bit on this topic and > > >>>point out > > >>>a very interesting paper on the subject of OO programming by > > >>>Les Hatton. > > >>>The title is "Does OO Synch with How We Think?", IEEE > > >>>Software, May/June > > >>>1998. Basically, the conclusion the author comes to and > > >>>provides evidence > > >>>for is that object-oriented programming results in more coding > > >>>errors and > > >>>each error takes long to fix. The reason he provides is that object- > > >>>oriented programming requires much greater dependence on the > > >>>developer's > > >>>long term memory (human memory and NOT RAM :-)) which > > >ultimate lead to > > >>>more errors and by extension they are going to take longer to fix. > > >>> > > >>> Now, I caveat the above with that Les' study was done before the > > >>>wide use of the Standard Template Library (STL). In fact, STL > > >>>was not used > > >>>in C vs. C++ comparison study. > > >>> > > >>> When deciding to go with C++ (vs C), the author recommends you > > >>>determine if you get a high degree of code reuse ( GUI > > >development has > > >>>benefited greatly from this). Otherwise, go with C. > > >> > > >> -- [rtl] --- > > >> To unsubscribe: > > >> echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR > > >> echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED] > > >> -- > > >> For more information on Real-Time Linux see: > > >> http://www.rtlinux.org/ > > > > > > > > > > > >----------------------------------------- > > >This email was sent using SquirrelMail. > > > "Webmail for nuts!" > > >http://squirrelmail.org/ > > > > > > > > >-- [rtl] --- > > >To unsubscribe: > > >echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR > > >echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED] > > >-- > > >For more information on Real-Time Linux see: > > >http://www.rtlinux.org/ > > > > > > > -- [rtl] --- > > To unsubscribe: > > echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR > > echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED] > > -- > > For more information on Real-Time Linux see: > > http://www.rtlinux.org/ > > > > -- [rtl] --- > To unsubscribe: > echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR > echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED] > -- > For more information on Real-Time Linux see: > http://www.rtlinux.org/ > -- [rtl] --- To unsubscribe: echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED] -- For more information on Real-Time Linux see: http://www.rtlinux.org/
