Re: Passing Parameter as Variable vs as address of variable

When you are in ILE then you have extra opportunities like passing pointers
by value and extra information about the variables passed (the OPT-DESC
part).

Also the the options CONST will (or will not) copy the value of a variable
to a hidden place and pass the pointer to the temporary variable.

option STRING will pass a pointer to a zero terminated string like in the
CONST case - handy for call C-library API's

You can say that calling programs is a subset of the ILE options calling
procedures.


On Fri, Aug 25, 2023 at 4:24 PM Vinay Gavankar <vinaygav@xxxxxxxxx> wrote:

Hi,

Since RPG internally passes the parm as an address of the variable, is
there any performance advantage in passing the address of the variable as a
parm instead of the variable itself when the variable is large (say 2K).

Is the answer the same when calling a program vs a procedure in a Service
Program?

TIA
Vinay
--
This is the RPG programming on IBM i (RPG400-L) mailing list
To post a message email: RPG400-L@xxxxxxxxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: https://lists.midrange.com/mailman/listinfo/rpg400-l
or email: RPG400-L-request@xxxxxxxxxxxxxxxxxx
Before posting, please take a moment to review the archives
at https://archive.midrange.com/rpg400-l.

Please contact support@xxxxxxxxxxxxxxxxxxxx for any subscription related
questions.