[TYPO3-core] RFC #16749

[Bjoern Pedersen]

Hi,

This is a SVN patch request.

Type: Bugfix

BT reference: http://bugs.typo3.org/view.php?id=16749
Branches:trunk

Problem:The problem of already deleted lock files still exists.
 * Solution : Add a "static" lock class and implement a lockFile-Lock.


Another problem was, that locks that never were acquired were never
released properly:
The early return in release returned wrongly
Soulution:
  * add a destruct member and use it as second flag for the early return


How to test:
   The error happens normaly when accesing a page very often directly
after cache clearing. As it is a race condition it is not really
"reproducible".


Note: The attached patch probably still needs some cleanup:
 * naming of the new classes?
 * where to store the global lock instance (Just a var in $Globals or
maybe in $globals['TSFE'] or ... ??


Björn
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