Experimental Physics and
Industrial Control System

Benjamin Franksen <[email protected]> · Mon, 23 May 2011 10:30:19 +0200

On Monday, May 23, 2011, Dirk Zimoch wrote:
> > [...] One exception frequently cited is when
> > starting an IOC its maybe ok, but if this occurs in common library code
> > then it's probably going to be used inappropriately in other
> > situations, and surely eventually we will need to upgrade allowing
> > online add and delete of records and then it's less clear when iocInit
> > starts and ends?
>
> This show why C++ exceptions are better than the good old C abort().

Certainly. If only one didn't have to buy all the other C++ trash together
with the very few features that are actually improvements over C...

> If
> creation of a new record fails because of insufficient memory, an
> exception can be thrown. During run-time it should be caught and an
> error should be reported to the user that the record can't be added to
> the system. During initialization, it may be acceptable not to catch the
> exception which will in the end call abort(). Thus the application
> developer and not the support library developer decides if the
> application (here the ioc) must die or not.
>
> By the way, if creation of a record fails because of a typo in a
> template file, the ioc happily continues starting up, but with one or
> many records missing -- even though this *is* a programming error, not a
> run-time problem.

Cheers
Ben

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System