[wp-trac] [WordPress Trac] #19700: Cron locking still not fixed in 3.3

[WordPress Trac]

#19700: Cron locking still not fixed in 3.3
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 Reporter:  archon810     |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Cron          |     Version:  3.3
 Severity:  major         |  Resolution:
 Keywords:                |
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Comment (by archon810):

 Finer than a second resolution is definitely needed. Another option would
 be to look into mutexes using something like flock or semaphores
 (http://stackoverflow.com/questions/2921469/php-mutual-exclusion-mutex),
 but really, what I found working great before is microsecond time stored
 in a database, then doing an update on that time with a WHERE clause that
 takes the microsecond value from the SELECT and seeing how many rows are
 updated. If 1, then WHERE matched and you were the first one to grab the
 row. If 0, some other process already updated, and you shouldn't do
 anything. I'm sure the WP team can figure out the best solution.

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Ticket URL: <http://core.trac.wordpress.org/ticket/19700#comment:4>
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