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And that is correct, you've created a semaphore.

El mar, 14 may 2024 a las 16:16, James H. H. Lampert via MIDRANGE-L (<
midrange-l@xxxxxxxxxxxxxxxxxx>) escribió:

Actually, since this was a matter of keeping two of the same batch job
from being active at the same time, and fighting with each other, I
ended up just creating a "baton" data area, and having the CL program
attempt to allocate an exclusive lock on it. A strategy I've used before.

Seems like there ought to be something built into the OS, to keep two of
the same job from getting into a fight.

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JHHL
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