re the same as doing the following in C:
myfunc(_field)
From: IBM Mainframe Discussion List on behalf of
Paul Gilmartin <042bfe9c879d-dmarc-requ...@listserv.ua.edu>
Sent: Sunday, March 26, 2023 4:19 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: ASM call by val
Hi Tony,
IIRC, the pointer to structure (or array), is passed as a value like
anything else.
Yes, the value passed allows the programmer to access the structure or
array, BUT, it's still a value like anything else (and will not be
modified upon return).
Regards,
David
On 2023-03-26 18:33,
Yes. It can be used to pass anything you want. But as always, caller &
called must agree on what's passed.
sas
On Sun, Mar 26, 2023 at 5:35 PM Frank Swarbrick
wrote:
> Can the MVS CALL macro be used to call a C function with "value"
> parameters (rather than reference parameters)?
>
>
No. You will need to create a proper C-style parm list, load it's
address into R1, and branch to the C routine address without using the
CALL macro.
Tony Thigpen
Frank Swarbrick wrote on 3/26/23 17:35:
Can the MVS CALL macro be used to call a C function with "value" parameters
(rather than
Structures are passed by address, not value.
Tony Thigpen
Paul Gilmartin wrote on 3/26/23 18:19:
On Sun, 26 Mar 2023 21:35:13 +, Frank Swarbrick wrote:
Can the MVS CALL macro be used to call a C function with "value" parameters
(rather than reference parameters)?
Aren't all parameters
On Sun, 26 Mar 2023 21:35:13 +, Frank Swarbrick wrote:
>Can the MVS CALL macro be used to call a C function with "value" parameters
>(rather than reference parameters)?
>
Aren't all parameters in C passed by value? C has no construct of "reference
parameters".
--
gil
Can the MVS CALL macro be used to call a C function with "value" parameters
(rather than reference parameters)?
--
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