Re: parameters - const, value, reference

[Barbara Morris <bmorris@xxxxxxxxxx>]

"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.