ri, Nov 17, 2023 at 5:32 AM Seymour J Metz wrote:
I find REXX extremely useful on PCs, but TSO/E REXX is a backwater
compared to ooRexx, and I would be tempted to use Java or Python for
complicated TSO scripts. But on z/Linux ooRexx with BSF4REXX is a
viable
option.
--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
עַם יִשְׂ
;
On Fri, Nov 17, 2023 at 5:32 AM Seymour J Metz wrote:
I find REXX extremely useful on PCs, but TSO/E REXX is a backwater
compared to ooRexx, and I would be tempted to use Java or Python for
complicated TSO scripts. But on z/Linux ooRexx with BSF4REXX is a viable
option.
--
Shmuel (Seym
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: External Functions in C on z/OS
Are you saying that you can call Java from ooRexx?
How does that happen? Do you spin-up a JVM running in standby mode? Do
you run ooRexx in a JVM?
I can call native code from Java, but always have to transit the JNI.
Never
ttp://mason.gmu.edu/~smetz3
עַם יִשְׂרָאֵל חַי
From: IBM Mainframe Discussion List on
behalf
of David Crayford
Sent: Thursday, November 16, 2023 4:02 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: External Functions in C on z/OS
I choose a language on capabilities rather than personal p
On Sat, 18 Nov 2023 13:27:10 +0800, David Crayford wrote:
>... What’s important to note is that their ports use enhanced ASCII and
> run in the z/OS UNIX environment so there is very little chance of using
> ooRexx to write an edit macro or a TSO/ISPF program.
>
ISPF can Edit files tagged
mason.gmu.edu/~smetz3
>>> עַם יִשְׂרָאֵל חַי
>>>
>>>
>>>
>>>
>>> From: IBM Mainframe Discussion List on behalf
>>> of David Crayford
>>> Sent: Thursday, November 16, 2023 4:02 PM
>
muel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
עַם יִשְׂרָאֵל חַי
From: IBM Mainframe Discussion List on behalf
of David Crayford
Sent: Thursday, November 16, 2023 4:02 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: External Functions in C on z/OS
I choose
ל חַי
From: IBM Mainframe Discussion List on behalf of
David Crayford
Sent: Thursday, November 16, 2023 4:54 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: External Functions in C on z/OS
I don't find ooRexx useful on the PC as it's basically on lif
Python seems like a wonderful language.
I didn't choose the Rexx language here. The client already had tens of
thousands of lines of Rexx code and contracted with me to write a callable
function in C++.
I did not become a very successful contract programmer by telling clients that
if they want
on behalf
> of David Crayford
> Sent: Thursday, November 16, 2023 4:02 PM
> To: IBM-MAIN@LISTSERV.UA.EDU
> Subject: Re: External Functions in C on z/OS
>
> I choose a language on capabilities rather than personal preference. I’ve
> been accused on this forum by my ex-colleague and
From: IBM Mainframe Discussion List on behalf of
David Crayford
Sent: Thursday, November 16, 2023 4:02 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: External Functions in C on z/OS
I choose a language on capabilities rather than personal preference. I’ve
I choose a language on capabilities rather than personal preference. I’ve been
accused on this forum by my ex-colleague and pal Wayne Bickerdyke of having a
pathological dislike of REXX. That’s not true, but I do find it less useful
than other languages. Python has a useful library called ctypes
On Thu, 16 Nov 2023 16:51:32 +, Farley, Peter wrote:
>
>Then your Rexx calls would use the least amount of environment setup and
>teardown. The down side is you would also need a “terminate” function in the
>“front end” to do the needed CEETERM for the LE/C++ environment you set up
>which t
Discussion List On Behalf Of
Charles Mills
Sent: Thursday, November 16, 2023 11:44 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: External Functions in C on z/OS
The function not provided by Metal C is basically all of C++. The called module
is written in, and exploits, C++.
Charles
On Wed, 15 Nov
The function not provided by Metal C is basically all of C++. The called module
is written in, and exploits, C++.
Charles
On Wed, 15 Nov 2023 21:26:18 +, Farley, Peter
wrote:
>OK, I sort of understand the “personal preference” about not using inline
>assembler (it is kludgey, I agree) a
TWO design errors IMHO:
XLC should provide a way to get the entry R0. Passing things in R0 is not
totally uncommon.
Rexx should be passing the environment block using standard linkage. It is
passing a standard list of parameters and control blocks as it is. Why put the
critical environment blo
Different strokes for different folks.
1. I was not aware of that pointer. This is the classic documentation problem.
The answer is right there in the manual, clear as day -- provided you know
where to look. A lot of these answers are easy to find, assuming you already
know the answer.
2. My
It is part of IBM XLC. The program is actually named EDCDSECT. It does a
less-than-perfect job but I find it to be an excellent starting point.
On Thu, 16 Nov 2023 10:16:54 -0500, Rick Troth wrote:
>I remember the DSECT2C command, but might have been from an ISV (maybe
---
y the value of the current R13 to a C
>pointer variable, then chain up the DSA stack?
>
>Peter
>
>From: IBM Mainframe Discussion List On Behalf Of
>Charles Mills
>Sent: Wednesday, November 15, 2023 12:39 PM
>To: IBM-MAIN@LISTSERV.UA.EDU
>Subject: Re: External Function
Thanks for checking, please let us know if they approve or not.
Peter
From: IBM Mainframe Discussion List On Behalf Of
David Crayford
Sent: Thursday, November 16, 2023 12:56 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: External Functions in C on z/OS
When I first published RTK it was using
ain up the DSA stack?
Peter
From: IBM Mainframe Discussion List On Behalf Of
Charles Mills
Sent: Wednesday, November 15, 2023 12:39 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: External Functions in C on z/OS
I see, in my C++ projects, EFPL, ENVB, EVALB and SHVB structs that appear to me
to ha
From: IBM Mainframe Discussion List On Behalf Of
Charles Mills
Sent: Wednesday, November 15, 2023 1:07 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: External Functions in C on z/OS
@Peter, I went around on the R0 question here a couple of years ago.
- No, I don't think there is a reliable
David C wrote
in /usr/include/zos (there is a PDS/E ...
The PDSE is shipped as SYS1.SIEAHDR.H
Peter Relson
z/OS ore Technology Design
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On 16.11.2023 02:24, Eric Erickson wrote:
First of all thanks to Colin for sending me the headers. Before I went down the
path of generating them myself, I want to see what other had experienced trying
to do this.
I can't use Metal C, as the routines I want to call out of the functions are
no
ctual property issues.
>
> Peter
>
> From: IBM Mainframe Discussion List On Behalf
> Of David Crayford
> Sent: Wednesday, November 15, 2023 9:28 PM
> To: IBM-MAIN@LISTSERV.UA.EDU
> Subject: Re: External Functions in C on z/OS
>
>
> My advice is to write a command pr
intellectual
property issues.
Peter
From: IBM Mainframe Discussion List On Behalf Of
David Crayford
Sent: Wednesday, November 15, 2023 9:28 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: External Functions in C on z/OS
My advice is to write a command processor. As I said creating an LE
On Wed, 15 Nov 2023 at 15:03, Paul Gilmartin <
042bfe9c879d-dmarc-requ...@listserv.ua.edu> wrote:
[...]
> In the REXX Ref. I see:
> Register 0
> Address of an environment block (optional)
>
> "optional" should never be specified as a register content. I read that
> as:
> A
Crayford
Sent: Wednesday, November 15, 2023 8:12 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: External Functions in C on z/OS
There isn’t an R0 issue. IRXINIT(‘FINDENVB’) will fetch the environment block.
All of the REXX mapping macros have been converted to C structures and can be
found in /usr
There's a TSO/E vector table that has the address of the REXX routines.
// get the address of the TSO/e vector table
CVT * cvt = *(( CVT ** ) CVTPTR);
TSVT * tsvt = cvt->cvttvt;
// IKJTSVT.H - TSO/E Vector Table mapping
//
// Contains addresses of branch entered routines and control blocks
> There isn’t an R0 issue. IRXINIT(‘FINDENVB’) will fetch the environment
> block.
IIRC I needed the entry R0 to get the address of IRXINIT so I could call it.
Charles
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My advice is to write a command processor. As I said creating an LE environment
for each function call will result in terrible performance. I’ve done this many
times https://github.com/daveyc/RTK. The trick is to use CEEPIPI to create a
pre-initialised LE environment and hang the pointer in USER
First of all thanks to Colin for sending me the headers. Before I went down the
path of generating them myself, I want to see what other had experienced trying
to do this.
I can't use Metal C, as the routines I want to call out of the functions are
not supported under Metal C.
FWIW, I was lo
;> At worst, an inline ASM routine to copy the value of the current R13 to a C
>> pointer variable, then chain up the DSA stack?
>>
>> Peter
>>
>> From: IBM Mainframe Discussion List On Behalf Of
>> Charles Mills
>> Sent: Wednesday, November 15, 2023 12:39
, November 15, 2023 1:07 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: External Functions in C on z/OS
@Peter, I went around on the R0 question here a couple of years ago.
- No, I don't think there is a reliable way to get the entry R13 from within
the C/C++ code. Obviously, if you could,
On Wed, 15 Nov 2023 12:06:48 -0600, Charles Mills wrote:
>@Peter, I went around on the R0 question here a couple of years ago.
>
CMSThink: Since no one uses R0, it's OK for everyone to use it.
And the developers who ported REXX to TSO were too unaware to spot
the problem and fix it. Or perhaps
ovember 15, 2023 12:39 PM
>To: IBM-MAIN@LISTSERV.UA.EDU
>Subject: Re: External Functions in C on z/OS
>
>
>I see, in my C++ projects, EFPL, ENVB, EVALB and SHVB structs that appear to
>me to have been produced from IBM macros by the EDCDSECT tool.
>
>
>
>Have you lo
copy the value of the current R13 to a C
pointer variable, then chain up the DSA stack?
Peter
From: IBM Mainframe Discussion List On Behalf Of
Charles Mills
Sent: Wednesday, November 15, 2023 12:39 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: External Functions in C on z/OS
I see, in my C
I see, in my C++ projects, EFPL, ENVB, EVALB and SHVB structs that appear to me
to have been produced from IBM macros by the EDCDSECT tool.
Have you looked for the IRX macros in SYS1.MACLIB?
Are you familiar with EDCDSECT?
Slightly changing the subject, to interface with the Rexx environment fr
I'll send you an xmit file offline. Ftp to z/OS as bin then use tso
receive
Colin
On Wed, 15 Nov 2023 at 16:57, Eric Erickson wrote:
> I've written quite a few callable external functions for Rexx over the
> years. On z/OS I've always used assembler as we needed to access system
> services fo
I've written quite a few callable external functions for Rexx over the years.
On z/OS I've always used assembler as we needed to access system services for a
variety of tasks. I've written them in C for other platforms (OS/2 & Windows)
over the years. I need to write some on z/OS, but I want to
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