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This is an automatically generated e-mail. To reply, visit:
<a href="https://git.reviewboard.kde.org/r/118988/">https://git.reviewboard.kde.org/r/118988/</a>
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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;">Random thought of the day: have you considered using QtConcurrent::run? it appears to me that the task at hand seems pretty much like the thing it is supposed to help with optimizing.
http://qt-project.org/doc/qt-4.8/qtconcurrentrun.html</pre>
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<a href="https://git.reviewboard.kde.org/r/118988/diff/1/?file=285067#file285067line24" style="color: black; font-weight: bold; text-decoration: underline;">libkcddb/musicbrainz/asyncmusicbrainzlookup.h</a>
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(Diff revision 1)
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cp">#include "musicbrainzlookup.h"</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cp">#include <QtCore/QThread></span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">move to cpp</pre>
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<a href="https://git.reviewboard.kde.org/r/118988/diff/1/?file=285067#file285067line30" style="color: black; font-weight: bold; text-decoration: underline;">libkcddb/musicbrainz/asyncmusicbrainzlookup.h</a>
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(Diff revision 1)
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="p">{</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">Q_OBJECT</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="nl">public:</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="kt">void</span> <span class="n">run</span><span class="p">()</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="p">{</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">Result</span> <span class="n">result</span><span class="p">;</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">CDInfoList</span> <span class="n">lookupResponse</span><span class="p">;</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">MusicBrainzLookup</span> <span class="n">lookup</span><span class="p">;</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">result</span> <span class="o">=</span> <span class="n">lookup</span><span class="p">.</span><span class="n">lookup</span><span class="p">(</span><span class="n">QString</span><span class="p">(),</span> <span class="mi">0</span><span class="p">,</span> <span class="n">m_offsetList</span><span class="p">);</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="n">result</span> <span class="o">==</span> <span class="n">Success</span><span class="p">)</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">lookupResponse</span> <span class="o">=</span> <span class="n">lookup</span><span class="p">.</span><span class="n">lookupResponse</span><span class="p">();</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">emit</span> <span class="nf">lookupFinished</span><span class="p">(</span><span class="n">result</span><span class="p">,</span> <span class="n">lookupResponse</span><span class="p">);</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="p">}</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">TrackOffsetList</span> <span class="n">m_offsetList</span><span class="p">;</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="nl">signals:</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="kt">void</span> <span class="nf">lookupFinished</span><span class="p">(</span> <span class="n">KCDDB</span><span class="o">::</span><span class="n">Result</span><span class="p">,</span> <span class="n">KCDDB</span><span class="o">::</span><span class="n">CDInfoList</span> <span class="p">);</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="p">};</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">move to cpp</pre>
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<p>- Harald Sitter</p>
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<p>On June 28th, 2014, 10:01 a.m. UTC, Frank Schaefer wrote:</p>
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<div>Review request for KDE Multimedia.</div>
<div>By Frank Schaefer.</div>
<p style="color: grey;"><i>Updated June 28, 2014, 10:01 a.m.</i></p>
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<b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>
<a href="http://bugs.kde.org/show_bug.cgi?id=336678">336678</a>
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<b style="color: #575012; font-size: 10pt;">Repository: </b>
libkcddb
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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;">From the documentation of QThread::~QThread():
"... Note that deleting a QThread object will not stop the execution of the thread it manages.
Deleting a running QThread (i.e. isFinished() returns false) will probably result in a program crash.
Wait for the finished() signal before deleting the QThread."
The destructor of class AsyncMusicBrainzLookup currently just deletes the lookup thread object
and does _not_ wait for the running thread to finish.
This causes crashes with the Audex CDDA extraction tool and likely also other users of libkcddb.
In addition to that, we are leaking the memory of a previously intstanciated lookup thread object if
the lookup() method is called multiple times.
Solve both issues by making the lookup thread object "self-destructive".
This way we can maintain the current behavior of the destructor (non-blocking) and
the lookup() method (always start a new lookup without canceling pending lookups).
As part of the solution the lookup thread is modifed to deliver the lookup results
directly with the "lookupFinished" signal. This has two benefits:
1.) the queued signal-slot connection avoids thread synchronization/locking issues
2.) some class members become obsolete</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;">yes</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>libkcddb/musicbrainz/asyncmusicbrainzlookup.h <span style="color: grey">(373fb16)</span></li>
<li>libkcddb/musicbrainz/asyncmusicbrainzlookup.cpp <span style="color: grey">(c13c94f)</span></li>
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<p><a href="https://git.reviewboard.kde.org/r/118988/diff/" style="margin-left: 3em;">View Diff</a></p>
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