Review Request: Make Sonnet::Speller::setLanguage threadsafe, fixing segfaults in krunner

[Simeon Bird]

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Review request for kdelibs and Plasma.


Description
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Krunner's spellcheck plugin has been pretty broken since bd291d21f096a714a171e7af3a534ba345ca5659 (about two years ago) because it called Sonnet::Speller::setLanguage every time the spellchecker was invoked, which was (very much) not thread-safe.

This patch makes Sonnet::Speller::setLanguage threadsafe by protecting all access to the internal dict pointer using QReadWriteLock. 

A related review request is 106244, which adds more fixes to the spellcheck feature.


This addresses bugs 264779 and 303831.
    http://bugs.kde.org/show_bug.cgi?id=264779
    http://bugs.kde.org/show_bug.cgi?id=303831


Diffs
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  kdecore/sonnet/speller.cpp b19e74d 

Diff: http://git.reviewboard.kde.org/r/106242/diff/


Testing
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Compiled, installed, used for a week or so, spellchecked a bunch of things.


Thanks,

Simeon Bird

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