Re: Recursive Calls

Doesn't this stuff drive you nuts?

In RPG IV, you can have Program A call Program B, which calls Program A
recursively.

When you create the recursive program, specify ACTGRP(*NEW). Then ILE
creates a new activation group each time the program is called. Hence a new
"data segment" is created, the cycle starts over, etc.



Bob Cozzi
www.rpgiv.com


----- Original Message -----
From: Chris Bipes <ChrisB@cross-check.com>
To: <MIDRANGE-L@midrange.com>
Sent: Thursday, July 08, 1999 9:49 AM
Subject: RE: Recursive Calls


> We use a parm to tell when we call program b from another program, say a.
> We disable the function keys in program b when not called from a menu but
> from another program using a function key.  The users are forced to return
> to program a.  This keeps the users from getting lost...  This is much
> simpler than trying to read/control the program stack.  One level of JUMP
> only.  You can also have your parm allow for several levels, each one
> holding the from program name, say 10 levels with a second parm being an
> array of 10 element of 10 chars to hold each program name.
>
> Christopher K. Bipes mailto:ChrisB@Cross-Check.com
> Sr. Programmer/Analyst mailto:Chris_Bipes@Yahoo.com
> CrossCheck, Inc.    http://www.cross-check.com
> 6119 State Farm Drive Phone: 707 586-0551 x 1102
> Rohnert Park  CA  94928 Fax: 707 586-1884
>
>
>
> -----Original Message-----
> From: Marc Zylka [mailto:mzylka@netpath.net]
> Sent: Wednesday, July 07, 1999 8:38 PM
> Subject: Recursive Calls
>
>
>
> I'm curious about how most people handle possible recursive calling
> situations.
> We're running V4R1 and coding in RPG/ILE.  We have a situation where
program
> A
> is called from a menu.  Program A creates a workorder and then calls
Program
> B,
> the workorder maintenance program.  From the workorder maintenance
program,
> one can use F6 to create another workorder, thus calling Program A.
>
> So, the questions:  When Program A calls Program B, can I remove it from
the
> program stack?  Can Program B remove it from the stack when it realizes
> that Program A needs to be called?  If program B can remove Program A from
> the stack, what happens when Program B ends and Program A is no longer
> there to go back to?  If any of this can be done, which manual outlines
how
> this is done?
>
> Thanks in advance,
> Marc Zylka ( mzylka@netpath.net )
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