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Jan Waclawek
08/15/05 15:48
Read: 958 times
Bratislava
Slovakia


 
#99484 - competent programming => working program
Responding to: Erik Malund's previous message
Absolutely that way - the result of incompetent programming is a program "working on the desk".
Let me use your example - atomicity, e.g. a multi-byte variable X is modified both in main and interrupt.
The incompetent programmer is not aware of the problem. There is no showing-off, he simply manipulates X in the most straighforward manner.
The competent programmer knows the problem and disables/reenables interrupts upon each usage in main, except in cases where interrupt is already disabled from context.
The defensive programmer requires to use a particular routine or makro for X manipulation, where he stores the interrupt flag, disables interrupts, makes the change, restores the interrupts and returns - this allows easy future changes in the required procedure.

Jan Waclawek


List of 57 messages in thread
TopicAuthorDate
defensive coding how and why      Erik Malund      08/12/05 15:33      
   What do you mean?      Craig Steiner      08/12/05 17:32      
      Elegant      Steve M. Taylor      08/13/05 00:20      
         Paradox?      Rob Klein      08/13/05 05:10      
      clarification      Erik Malund      08/15/05 06:35      
         Remember      Neil Kurzman      08/15/05 11:43      
            Absolutely, and even then should be avoi      Erik Malund      08/15/05 12:19      
            Absolutely, and even then should be avoi      Erik Malund      08/15/05 12:19      
            extrodiaray?      Jan Waclawek      08/15/05 13:12      
                extrodiaray?      Craig Steiner      08/15/05 13:17      
                  Goooooogle      Jan Waclawek      08/15/05 15:08      
                     No, he does not      Erik Malund      08/15/05 15:30      
                        proofreading      Jan Waclawek      08/16/05 03:27      
                     Another challeneg      Craig Steiner      08/15/05 15:49      
                        another challenge      Jan Waclawek      08/16/05 03:45      
               OK, I can not Spell      Neil Kurzman      08/15/05 19:18      
                  this is my point      Jan Waclawek      08/16/05 03:30      
                     I sure you could, But      Neil Kurzman      08/16/05 09:35      
                        Really?      Craig Steiner      08/16/05 10:20      
                           professors and classes      Jan Waclawek      08/16/05 10:50      
                           Really !      Neil Kurzman      08/17/05 14:05      
                              Hmmm      Craig Steiner      08/17/05 14:09      
            defensive commenting      Jan Waclawek      08/16/05 03:59      
         Don't know      Craig Steiner      08/15/05 12:47      
            Ok, let me get away from that word      Erik Malund      08/15/05 13:49      
               Gotcha      Craig Steiner      08/15/05 14:44      
                  and I came to truly despise that word wh      Erik Malund      08/15/05 15:07      
                     Just like driving      Kalpak Dabir      08/17/05 20:48      
            Elegant equals...      Dan Henry      08/15/05 17:21      
               that it      Erik Malund      08/16/05 06:11      
               Oh, how true...!      Andy Neil      08/23/05 05:29      
                  It's never the author's problem      Dan Henry      08/23/05 08:51      
                     I knew a person who told me about a real      Erik Malund      08/23/05 09:38      
                        A blissful existence      Dan Henry      08/23/05 18:37      
                  Your bugs versus my bugs (or vice versa)      Dan Henry      08/23/05 18:34      
                     common wisdom has it that the average pr      Erik Malund      08/24/05 07:34      
   One exception      Ian Bell      08/13/05 08:32      
      exceptions      Erik Malund      08/15/05 06:45      
         vice versa      Jan Waclawek      08/15/05 06:53      
            what is obvious      Erik Malund      08/15/05 07:58      
               your mileage may vary      Jan Waclawek      08/15/05 08:15      
                  that is the very same      Erik Malund      08/15/05 09:05      
                     competent      Jan Waclawek      08/15/05 13:40      
                        please define "working"      Erik Malund      08/15/05 14:02      
                           competent programming => working program      Jan Waclawek      08/15/05 15:48      
   i'm new      Emem Essien      08/18/05 05:10      
      if you move your eyeballs a bit to the l      Erik Malund      08/18/05 06:22      
         Coding Bible      Russell Bull      08/20/05 08:16      
            Precedence vs. explicitness      Dan Henry      08/20/05 09:27      
   Outlaw coding!      Russell Bull      08/21/05 06:47      
      a program it is, by definition, asynchro      Erik Malund      08/22/05 07:42      
         Methinks the point was missed      Russell Bull      08/22/05 18:20      
            "Easy?"      Andy Neil      08/23/05 03:13      
            but we agree      Erik Malund      08/23/05 07:34      
      VIPER?      Andy Neil      08/22/05 10:53      
      What does "timing" mean?        Dan Henry      08/22/05 20:03      
         excuse the foreigner, if he was not clea      Erik Malund      08/23/05 07:36      

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