On 6/1/2011 5:23 AM, Peter Relson wrote:
no asynchronous exit routine can interrupt another
asynchronous exit routine
Perhaps VTAM does something special, but in general this is not true.
VTAM schedules only one exit at a time. It's amazing how many people erroneously
believe that this implies a restriction on IRB scheduling in general. Do they
imagine that STIMER[M] exits can't run while a VTAM exit is in control (or vice
versa)? Would a STIMER[M] issued by the VTAM exit itself not work as expected?
Pondering such questions for a few moments should expose the folly of this
thinking.
--
Edward E Jaffe
Phoenix Software International, Inc
831 Parkview Drive North
El Segundo, CA 90245
310-338-0400 x318
[email protected]
http://www.phoenixsoftware.com/
