RE: Cobol/Seu and Data Areas

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Howard.

Yes, you are right.  My experience is that a dataarea is a common area, so
Pgm2 will meet a locked (or changed)dataarea  if Pgm1 has done such a
thing to it.


Mvh.

Geir Kildal






"Weatherly, Howard" <Howard.Weatherly@dlis.dla.mil>
Sent by: cobol400-l-admin@midrange.com
21.10.2002 15:57
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        Subject:        RE: Cobol/Seu and Data Areas


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Thanks Jon, that did the trick! Of course it would have helped if I had
been
paying greater attention to the italics in the manual, even still it's a
poor example, yours however hit the nail on the head!

Since you mention the locks, I have a quick question: This data area is a
simple transaction counter however there can be more than one transaction
running at a time. If I specify with lock, and another transaction
attempts
to retrieve the data area, will that take the "on exception" path?

-----Original Message-----
From: Jon Paris [mailto:Jon.Paris@Partner400.com]
Sent: Friday, October 18, 2002 7:02 PM
To: cobol400-l@midrange.com
Subject: RE: Cobol/Seu and Data Areas


The ability for ILE COBOL (not OPM COBOL) to access named data areas has
been supported since V3R7.  The basic syntax is like so:

DISPLAY/ACCEPT Sourcefield UPON/FROM  DataAreaSpecialName FOR DataAreaNAme
IN LibraryName AT StartPosition WITH LOCK ON EXCEPTION StuffToDo  NOT ON
EXCEPTION OtherStuffToDo END-DISPLAY.

Where DataAreaSpecialName is associated with the environment name
DATA-AREA
in the SPECIAL-NAMES paragraph.  So your example should be coded like so
and
will work just fine.

I deleted the original message so I can't check, but did your code include
the "Configuration Section" entry?  There appears to be a bug in the
compiler such that it does not diagnose this as missing, but will
erroneously flag other things (in particular SPECIAL-NAMES) as being
invalid.  Perhaps this caused your problem?

Here's roughly what your code should look like.

       Identification Division.
       Program-Id.  TESTPROG.
       Configuration Section.
       Special-Names.  DATA-AREA is Trans-Count.

       Data Division.
       Working-Storage Section.

       77 WS-TRANS-COUNT     Pic S9(13) Comp.
      * Other WS stuff here
       Procedure Division.
       Main.
           Accept WS-TRANS-COUNT from Trans-Count
                  for "DRDACNT" library WS-WORK-LIB.

           Display WS-TRANS-COUNT upon TransCount
                  for "DRDACNT" library WS-WORK-LIB.

Jon Paris
Partner400


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