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This is an automatically generated e-mail. To reply, visit:
<a href="https://git.reviewboard.kde.org/r/126507/">https://git.reviewboard.kde.org/r/126507/</a>
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<a href="https://git.reviewboard.kde.org/r/126507/diff/2/?file=428212#file428212line1176" style="color: black; font-weight: bold; text-decoration: underline;">src/kdeui/k4style.cpp</a>
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(Diff revision 2)
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">void K4Style::drawPrimitive(PrimitiveElement elem, const QStyleOption *option, QPainter *painter, const QWidget *widget) const</pre></td>
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<th bgcolor="#e9eaa8" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2">1176</font></th>
<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">tiles</span> <span class="o">&&</span> <span class="n">hasSolidBackground</span><span class="p">)</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="kt">bool</span> <span class="n">hasCachedTiles</span> <span class="o">=</span> <span class="n">d</span><span class="o">-></span><span class="n">selectionCache</span><span class="p">.</span><span class="n">contains</span><span class="p">(</span><span class="n">key</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;">The double-lookup looks slow and unnecessary.
contains + *object doesn't give you anything that object (followed by a dereference if not null) gives you.
If the fear is concurrent access, then contains + *object can still dereference a null pointer anyway.
But K4Style runs in the GUI thread always anyway. So I would call object(), put that into a pointer, and then if not null, make a copy into a value. This avoids the double lookup.</pre>
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<p>- David Faure</p>
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<p>On January 2nd, 2016, 1:55 a.m. UTC, Michael Pyne wrote:</p>
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<div>Review request for KDE Frameworks.</div>
<div>By Michael Pyne.</div>
<p style="color: grey;"><i>Updated Jan. 2, 2016, 1:55 a.m.</i></p>
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<b style="color: #575012; font-size: 10pt;">Repository: </b>
kdelibs4support
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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;">Fix a couple of Coverity issues:</p>
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<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">CID 1175508; file descriptors used in KLockFile could be leaked in
error conditions. Even when KLockFile sets mustCloseFd, the dtor's impl
also checks that the lock has been taken, which is only considered true
if LockOK had been returned in our lock function. Instead close() the fd
ourselves unless we make it to LockOK.</p>
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<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">CID 1175555; The standard mis-use of QCache. QCache::insert can, in
theory, delete our object as soon as we insert it into cache, so we have
to check for that. Even ::contains() and ::object() can be risky (the
pointers returned by object() have no lifetime guarantee), but since
this is GUI code I assume it's only used single-threaded and not
re-entrant. Otherwise we'd need even more paranoia...</p>
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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;">Everything builds and appears to still work, though it's hard to test K4Style as I'm not sure what uses it right at this point.</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/kdecore/klockfile_unix.cpp <span style="color: grey">(67283a5)</span></li>
<li>src/kdeui/k4style.cpp <span style="color: grey">(a1a2ab1)</span></li>
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<p><a href="https://git.reviewboard.kde.org/r/126507/diff/" style="margin-left: 3em;">View Diff</a></p>
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