RE: parameters - const, value, reference

["Bob cozzi" <cozzi@xxxxxxxxx>]

Barbara,
So you're saying that this is valid:
D myProc1            PI
D  myfixedParm                     1A
D  work1             S            50A

callP      myproc1(work1)

But this is not valid:
D myProc2            PI
D  myfixedParm                    50A  VARYING
D  work2             S           100A
D  work3             S            10A

Callp   myproc2(Work2)
Callp   myproc2(Work2)

But by adding OPTIONS(*VARSIZE) to MYPROC2's parm, it the callp's would be
permited? Is that true? 

Bob Cozzi
Cozzi Consulting
www.rpgiv.com


-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of Barbara Morris
Sent: Monday, June 23, 2003 2:37 PM
To: rpg400-l@xxxxxxxxxxxx
Subject: Re: parameters - const, value, reference

"M. Lazarus" wrote:
> 
> Joe,
> 
>   I apologize - I looked at the code quickly and thought that I saw
> "varying" on the prototype variable.  The code will work.  But would
> putting *VARSIZE on the Cmd line perform better or would that just add
> operational descriptor overhead?
> 

Mark, *VARSIZE doesn't cause operational descriptors to get passed. 
(And operational descriptors don't apply to program calls anyway.)

When you code *VARSIZE, you have to make sure the called procedure has a
way to know how much data was passed.  The most usual ways are through
operational descriptors (you would code OPDESC on the prototype), or
through an extra parameter giving the length.

If *VARSIZE has any effect on a call to QCMDEXC, it would be to make the
call faster, since only the actual command length needs to be copied to
the parameter.

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