On Sun, 26 Mar 2023 21:35:13 +0000 Frank Swarbrick
<[email protected]> wrote:
:>Can the MVS CALL macro be used to call a C function with "value" parameters
(rather than reference parameters)?
What does "call by value" look like?
Does the subroutine definition indicate that the parameters are by value? If
not, all call by value means is that should the subroutine alter the value,
the change is discarded.
For example, instead of
CALL rtn,(A,B)
do
MVC ACOPY,A
MVC BCOPY,B
CALL rtn,(ACOPY,BCOPY)
Should RTN change the first parameter, it will not change A.
--
Binyamin Dissen <[email protected]>
http://www.dissensoftware.com
Director, Dissen Software, Bar & Grill - Israel
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