Thank you John, I missed it in my old age ....mucho thx Scott ford www.identityforge.com from my IPAD
'Infinite wisdom through infinite means' > On Dec 19, 2013, at 2:16 PM, John McKown <john.archie.mck...@gmail.com> wrote: > >> On Thu, Dec 19, 2013 at 12:55 PM, Scott Ford <scott_j_f...@yahoo.com> wrote: >> >> I have a C threading question.. My scenario multiple C threads, posix(on), >> who all can call a Cobol "thread" aware program in the threads, with their >> own local-storage. My question is "will each thread have storage that will >> be separate from each other ?" These called programs have the same variable >> names in local-storage . >> > > Yes, according to > Ref: > http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/igy3pg31/4.4 > <quote> > > *Choosing* *LOCAL-STORAGE* *or* *WORKING-STORAGE:* Because you must code > your multithreaded programs as recursive, the persistence of data is that > of any recursive program: > > > - Data items in the LOCAL-STORAGE SECTION are automatically allocated > for each instance of a program invocation. When a program runs in multiple > *threads* simultaneously, each invocation has a separate copy of > LOCAL-STORAGE data. > > - Data items in the WORKING-STORAGE SECTION are allocated once for each > program and are thus available in their last-used state to all invocations > of the program. > > > For the data that you want to isolate to an individual program invocation > instance, define the data in the LOCAL-STORAGE SECTION. In general, this > choice is appropriate for working data in *threaded* programs. If you > declare data in WORKING-STORAGE and your program changes the contents of > the data, you must take one of the following actions: > > > - Structure your application so that you do not access data in > WORKING-STORAGE simultaneously from multiple *threads*. > > - If you do access data simultaneously from separate *threads*, write > appropriate serialization code. > > > </quote> > > >> >> Scott ford >> www.identityforge.com >> from my IPAD >> >> 'Infinite wisdom through infinite means' >> >> > > > -- > This is clearly another case of too many mad scientists, and not enough > hunchbacks. > > Maranatha! <>< > John McKown > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
