Re: recursive calls

[Gary Thompson <GThompson@xxxxxxxxxxx>]

I think your coworker is correct.  Is this not how a service program 
works?




David FOXWELL <David.FOXWELL@xxxxxxxxx> 
Sent by: rpg400-l-bounces@xxxxxxxxxxxx
01/31/2011 07:55 AM
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RPG programming on the IBM i / System i <rpg400-l@xxxxxxxxxxxx>


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Subject
recursive calls






Hi all

Today, by accident I set up a job where program tried to call itself. We 
have one program that is duplicated in several libraries and LIBA/PGM 
should have called LIBB/PGM. This was the first time I'd actually seen the 
error produce in this way. A coworker informed me that recursive calls 
were possible with subprocedures thanks to the fact that at each call, a 
separate storage area is allocated for each subprocedure. This is not the 
case for program calls. That means that if mySP calls mySP and there is a 
local variable V1,  there will be two adresses for V1, each containing a 
different value.
I don't doubt my coworker, it's just that my reference is midrange.com.

Is my information accurate? What happens to static variables in such 
subprocedure calls?