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| go ahead... be a heretic | |
| PerlMonks |
Re^4: File Lockingby Anonymous Monk |
| on Mar 23, 2011 at 13:15 UTC ( #894995=note: print w/ replies, xml ) | Need Help?? |
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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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