[KDE/Mac] Review Request 121134: make KGlobal reference counting threadsafe
René J.V. Bertin
rjvbertin at gmail.com
Sun Nov 16 19:01:33 UTC 2014
-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
https://git.reviewboard.kde.org/r/121134/
-----------------------------------------------------------
(Updated Nov. 16, 2014, 8:01 p.m.)
Review request for KDE Software on Mac OS X and kdelibs.
Changes
-------
Updated the "Testing Done" text.
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 (updated)
-------
On OS X 10.6.8 only for now.
NB: Qt itself uses the QAtomicInt's parent class (QBasicAtomicInt) for its own reference counter used for implicit sharing. This is thus well-tested code that is unlikely to introduce regressions to a core KDE feature.
Thanks,
René J.V. Bertin
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.kde.org/pipermail/kde-mac/attachments/20141116/8ccd847a/attachment.html>
More information about the kde-mac
mailing list