Review Request: Add flock()/lockf()-based locking mechanizm to KSharedDataCache

[Vadim Zhukov]

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Review request for kdelibs and Michael Pyne.


Description
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This patch adds another lock type, to be used as a last resort when no non-blocking lock mechanisms are available on the current platform.

LOCKTYPE_FILE = 4 for compatibility with atomic-based locking mechanism patch in another review.


This addresses bug 305023.
    http://bugs.kde.org/show_bug.cgi?id=305023


Diffs
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  kdecore/util/ConfigureChecks.cmake fe9f47e 
  kdecore/util/config-util.h.cmake 83ccdf7 
  kdecore/util/kshareddatacache.cpp 393902e 
  kdecore/util/kshareddatacache_p.h ec5a7a0 

Diff: http://git.reviewboard.kde.org/r/106237/diff/


Testing
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On OpenBSD-CURRENT.


Thanks,

Vadim Zhukov

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