[KDE/Mac] Review Request 121134: make KGlobal reference counting threadsafe

René J.V. Bertin rjvbertin at gmail.com
Sun Nov 16 14:12:52 UTC 2014


-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
https://git.reviewboard.kde.org/r/121134/
-----------------------------------------------------------

Review request for KDE Software on Mac OS X and kdelibs.


Repository: kdelibs


Description
-------

I have been experiencing unexpected exits from KDevelop that were not due to any kind of error in the KDevelop code; it was as if someone told the application to exit normally. This happens mostly on OS X, but also sometimes on Linux.
I finally traced this to `KGlobal::deref` reaching a zero reference count and invoking `QCoreApplication::quit` when called from one of KDevelop's KJob dtors. There does not appear to be a reference counting mismatch in the code, so the issue might be due to a race condition in KGlobal::ref/deref.

This patch introduces thread-safety to KGlobal's reference counting by turning the simple global `static int s_refCount` into a `static QAtomicInt s_refCount`. I consider this an important bug fix regardless of whether it corrects the issue I have with KDevelop.


Diffs
-----

  kdecore/kernel/kglobal.cpp cf003a4 

Diff: https://git.reviewboard.kde.org/r/121134/diff/


Testing
-------

On OS X 10.6.8 only for now.


Thanks,

René J.V. Bertin

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.kde.org/pipermail/kde-mac/attachments/20141116/5b81fb7d/attachment.html>


More information about the kde-mac mailing list