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  2. RPG400-L
  3. November 2005

Re: Only one instance of program.

"Venkateshwar" <venkateshwar.raman@xxxxxxxxx> wrote:
Is there anyway by which I can ensure that only one instance of a program is running? This program generates a 
number and there is chance that it can be
called by 2 programs to generate number and there is a chance both can get same number.
"Instance of a program." Hmm. Technically, on an AS/400, there's never more than one "instance of a program" in memory at a time.
Of course, there could be many *activations* of a program in memory at a time, each with its own static and dynamic storage.
At any rate, I would imagine that all you should need to do is have it get an exclusive lock on something as soon as it starts executing, and release the lock just before it returns. 

--
JHHL

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