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This is an automatically generated e-mail. To reply, visit:
<a href="https://git.reviewboard.kde.org/r/121885/">https://git.reviewboard.kde.org/r/121885/</a>
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<p style="margin-top: 0;">On January 6th, 2015, 7:20 p.m. CET, <b>David Edmundson</b> wrote:</p>
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<a href="https://git.reviewboard.kde.org/r/121885/diff/1/?file=338653#file338653line330" style="color: black; font-weight: bold; text-decoration: underline;">src/platformtheme/kdeplatformsystemtrayicon.cpp</a>
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(Diff revision 1)
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">void KDEPlatformSystemTrayIcon::showMessage(const QString &msg, const QString &title,</pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">QDBusReply</span><span class="o"><</span><span class="kt">bool</span><span class="o">></span> <span class="n">reply</span> <span class="o">=</span> <span class="n">QDBusConnection</span><span class="o">::</span><span class="n">sessionBus</span><span class="p">().</span><span class="n">interface</span><span class="p">()</span><span class="o">-></span><span class="n">isServiceRegistered</span><span class="p">(</span><span class="s">"org.kde.StatusNotifierWatcher"</span><span class="p">);</span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">QDBusInterface</span> <span class="n">systrayHost</span><span class="p">(</span><span class="s">"org.kde.StatusNotifierWatcher"</span><span class="p">,</span> <span class="s">"/StatusNotifierWatcher"</span><span class="p">,</span> <span class="s">"org.kde.StatusNotifierWatcher"</span><span class="p">);</span></pre></td>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">the statusnotifierwatcher is a kded module, which means if another kded module tries to create an SNI (and at least one does) we're going to deadlock I think?</p></pre>
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<p>On January 6th, 2015, 7:22 p.m. CET, <b>Martin Klapetek</b> wrote:</p>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Are we? I'm not sure really...how else could we do this then?</p></pre>
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<p>On January 6th, 2015, 7:23 p.m. CET, <b>Martin Klapetek</b> wrote:</p>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Possibly we could cut off the $PID part of the service name and then simply check for that service, though this API seems more robust</p></pre>
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<p>On January 7th, 2015, 7:45 a.m. CET, <b>Martin Gräßlin</b> wrote:</p>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">I cannot mentally construct a dead lock situation. Could you please elaborate on what would dead lock?</p></pre>
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<p>On January 7th, 2015, 10:25 a.m. CET, <b>David Edmundson</b> wrote:</p>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">we're the kded, it's starting up.
We load the keyboard layout switching daemon
That tries creates a Status Notifier Item</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">lib knotification queries if we're using the legacy tray, it's using the QPA so it's using this code all in the same process
That makes a DBus call to org.kde.StatusNotifierWatcher and blocks for a reply</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">StatusNotifierWatcher is another kded module, it can't respond because we're blocked awaiting a reply from ourselves.</p></pre>
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<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><blockquote style="text-rendering: inherit;padding: 0 0 0 1em;border-left: 1px solid #bbb;white-space: normal;margin: 0 0 0 0.5em;line-height: inherit;">
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">lib knotification queries if we're using the legacy tray, it's using the QPA so it's using this code all in the same process</p>
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<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">is that really the case? This code here should only be run if sni is not available.</p></pre>
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<p>- Martin</p>
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<p>On January 6th, 2015, 7:16 p.m. CET, Martin Klapetek wrote:</p>
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<div>Review request for KDE Frameworks.</div>
<div>By Martin Klapetek.</div>
<p style="color: grey;"><i>Updated Jan. 6, 2015, 7:16 p.m.</i></p>
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<b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>
<a href="https://bugs.kde.org/show_bug.cgi?id=339707">339707</a>
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<b style="color: #575012; font-size: 10pt;">Repository: </b>
frameworkintegration
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">The "org.kde.StatusNotifierWatcher" is just a watcher/helper, not the actual systray object, that's "org.kde.StatusNotifierHost-$PID". Because Plasma appends the PID, we cannot check directly for it being present on the bus, so we check the org.kde.StatusNotifierWatcher.IsStatusNotifierHostRegistered property that's meant to be used for this.</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Plus QSystemTrayIcon::isSystemTrayAvailable() is actually returning always true, because the Watcher is in kded and is /always/ present.</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">This also fixes many apps with KSNI crashing on plasma exit, bug 339707 (though I believe this is not the direct cause for that bug)</p></pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Things do not crash anymore and the ::isSystemTrayAvailable() now returns correct value.</p></pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>src/platformtheme/kdeplatformsystemtrayicon.cpp <span style="color: grey">(b5e207c)</span></li>
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<p><a href="https://git.reviewboard.kde.org/r/121885/diff/" style="margin-left: 3em;">View Diff</a></p>
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