Re: Extending a third party tagged type while adding finalization

[AdaMagica <christ-usch.grein@t-online.de>]

Am Montag, 11. Dezember 2017 23:42:03 UTC+1 schrieb Randy Brukardt:
> And no one else seems to be reading this...

That's not true, I'm following with awe your endless discussions (not only this one) which never lead to a conclusion. I often have problems following Dmitry's posts when he uses non-Ada terms or Ada terms with another meaning.

Now for ADTs.

I'm thinking of the millions lines of code embedded helicopter code that I rehosted for a flight simulator. (Btw - only very few lines of code had to be touched because of hardware dependence, mostly little vs. big endian, and because of compiler dependence, all ill-used Ada code).

How could the main subprogram have been an ADT? It was an infinite loop running with 20 ms cycle time of which it could use only 5 ms, reading and handling the different simulator states (there were many: init, running, freeze, repositioning, snapshot reload etc.) manipulated by the flight instructor.

External power supply (starting avionics elaboration and tasks, terminating and restarting with power loss) was an ADT, but to my dismay developed into chaos because of the many different simulator states.

Another ADT was the tasking management (Ada's preemptive scheduling had to be adapted to the above 5 ms and 15 ms sleeping with only faint intrusion into the original tasks). This indeed was a very nice small ADT I'm still fond of.

There were a lot of other ADTs and non-ADTs. So I'm more on Randy's side.