Plateforme Level Extreme
Abonnement
Profil corporatif
Produits & Services
Support
Légal
English
Destroy fires twice
Message
De
22/02/2010 10:38:29
 
 
À
Tous
Information générale
Forum:
Visual FoxPro
Catégorie:
Classes - VCX
Titre:
Destroy fires twice
Versions des environnements
Visual FoxPro:
VFP 7 SP1
OS:
Windows XP SP2
Database:
Visual FoxPro
Divers
Thread ID:
01450229
Message ID:
01450229
Vues:
226
Here's the overall structure of a program:
PROC main_job
private poLog
poLog = NULL
main_job2()
poLog = NULL                     && <== here the Destroy() fires again
RETURN

PROC main_job2
     poLog = someobject()
     RETURN                     && <== here the Destroy() fires first
The object has cleanup code in its Destroy(). I'd expect the Destroy() to fire where I set poLog to NULL again. However, it also appears to fire on the RETURN of main_job2. Why?

But there's a far more serious problem. Within the second Destroy() the internal memory space of VFP gets screwed up totally, ruining certain variables. This happens on the line of code where variables are declared LOCAL (in the Destroy Event).

Anyone here familiar with this quirck/bug? Is it my misunderstanding of some concept?
Groet,
Peter de Valença

Constructive frustration is the breeding ground of genius.
If there’s no willingness to moderate for the sake of good debate, then I have no willingness to debate at all.
Let's develop superb standards that will end the holy wars.
"There are three types of people: Alphas and Betas", said the beta decisively.
If you find this message rude or offensive or stupid, please take a step away from the keyboard and try to think calmly about an eventual a possible alternative explanation of my message.
Suivant
Répondre
Fil
Voir

Click here to load this message in the networking platform