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Re^4: File Locking

by Anonymous Monk
on Mar 23, 2011 at 13:15 UTC ( #894995=note: print w/replies, xml ) Need Help??

in reply to Re^3: File Locking
in thread File Locking

OPTIMIST (likely to find the item in the list): Start with a shared lock, and without unlocking, "promote" to an exclusive lock once not found; make sure there is a timer on the attempt to prevent a deadlock, and if the timer goes off then unlock and retry from the top.

PESSIMIST (unlikely to find the item in the list): Use the exclusive lock from the beginning.

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