This is what I'm trying to accomplish: I was asked to look at providing an interface between one of our products that runs in CMS to another of our products that runs in z/OS. I already have a general-purpose REXX program in CMS that communicates with the z/OS-based program via REXX sockets. It acts as an agent for the z/OS program, in that it will issue commands on its behalf, return results, as well as plug itself into the *MSG and *VMEVENT system services (a bit like WAKEUP). At the heart of the REXX program is an event handler that waits on socket events, console events, IUCV events (converted to MT CMS events by a nucleus extension) and timer events.
The problem I have is that product that the CMS-based product appears to only return information via the program stack. That prompted me to look for a way to be told about data arriving on the program stack so that I could read each line as it arrives from the stack and convert it to an MT CMS event that my dispatcher loop could deal with. You've answered my question, the answer being what I suspected (there not being a way to be notified about data being queued to the stack). It's sounding like I should talk to the people who own this CMS-based product about having it modified to have the option to use something a little more sophisticated than the program stack to return information. That's the next step I'll take if this goes any further (which it probably won't). Thanks, Mark Gillis. -----Original Message----- From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Alan Altmark Sent: Sunday, 1 May 2011 2:06 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Managing the CMS program stack from a multitasking CMS application On Thursday, 04/28/2011 at 05:17 EDT, "Gillis, Mark" <mark.gil...@ca.com> wrote: > I have a multitasking CMS application that waits for a number of different > types of events and I would like to add a new event type that represents data > from the CMS stack. I thought that the obvious way to do this would be to start > a separate thread that would own the stack and issue an event to contain each > line that arrives on the stack. My question is: > > Is there a way to be notified when data is added to the CMS program stack? I > don?t want to poll, or do anything to cause a read to result to the virtual > console. I don?t see anything in the CMS Macros and Function Reference, REXX/VM > Reference, CMS Callable Services Reference, or the CMS Application Multitasking > manuals that appear to fit the bill. There is no built-in event monitor for CMS program stack events. If you tell us what you're trying to accomplish, perhaps we can provide some guidance. Alan Altmark z/VM and Linux on System z Consultant IBM System Lab Services and Training ibm.com/systems/services/labservices office: 607.429.3323 mobile; 607.321.7556 alan_altm...@us.ibm.com IBM Endicott
