Determine if only one instance is running: Difference between revisions

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IF flock(me, LOCK_EX | LOCK_NB) <> 0 THEN
IF flock(me, LOCK_EX | LOCK_NB) <> 0 THEN
PRINT "I am blocked, exiting..."
PRINT "I am already running, exiting..."
END
END
ENDIF
ENDIF
Retrieved from "https://rosettacode.org/wiki/Determine_if_only_one_instance_is_running"