Re: Calling RPGILE program from C

Another question comes to mind. If RPG is NOT reentrant, why does Alan
Campin's code work?

On Wed, Oct 29, 2014 at 6:56 AM, Tony Cate <tonyc@xxxxxxxxxxxxxxx> wrote:

I am building a trigger mediator and recursion is the issue. As a side
note Charles Wilt's note '...at v5r4 RPG programs aren't reentrant...'
surprised me. At what release are they reentrant?

Anyway, I looked at Alan Campin's code. It seems really convoluted.
Wouldn't a pass thru C program calling a SRVPGM proc do the same thing?

John, what do you mean by 'direct'?

On Tue, Oct 28, 2014 at 5:23 PM, Jon Paris <jon.paris@xxxxxxxxxxxxxx>
wrote:

Yup - I was going to suggest the same thing if he needed flexibility. Or
just do it “direct” if not.


Jon Paris

www.partner400.com
www.SystemiDeveloper.com

On Oct 28, 2014, at 4:44 PM, Jon Paris <jon.paris@xxxxxxxxxxxxxx> wrote:

Not being funny Tony - but if you are calling an RPG program to do the

work then why bother with the C at all?

Jon Paris

www.partner400.com
www.SystemiDeveloper.com

On Oct 28, 2014, at 4:02 PM, Tony Cate <tonyc@xxxxxxxxxxxxxxx> wrote:

First the code:

*#include <stdio.h>*
*#include <string.h>*

*#include <decimal.h>
#include <stdlib.h>

typedef void RGTRIGCNTL(char[80], decimal(10,0));

#pragma linkage(RGTRIGCNTL,fetchable)

int main(int argc, char *argv[])
{
char *triggerInfo;
decimal (10,0) triggerLen;

triggerInfo = argv[1];
triggerLen = argv[2];

RGTRIGCNTL(triggerInfo, &triggerLen);
}*

*What's going on: trying to write a small C program to attach to file

triggers.*

Problems:

pragma linkage won't allow 'OS' for a parameter. Everything I've read
indicates that's what I want. The only "ID' compiler didn't barf on is
'fetchable', which is why its there.

It compiles, but nothing happens when I try to step into RGTRIGCNTL.

The Dev box is V5R4 (long story).

The questions:

Why can't I use 'OS' in linkage? Why isn't my program getting called?

The last time I wrote a C program was in college, a looong time ago.
--
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*Tony Cate* | Senior Programmer/Analyst | 704.872.2458 x 126
[image: Auction Edge, Inc.] <http://www.auctionedge.com/>
*AUCTION EDGE, INC.* | *Powering Independent Auctions*
STATESVILLE, NC | 704.872.2458