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This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/2746/">https://reviewboard.asterisk.org/r/2746/</a>
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<p style="margin-top: 0;">On August 9th, 2013, 9:27 a.m. CDT, <b>opticron</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/2746/diff/1/?file=43817#file43817line522" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/include/asterisk/astobj2.h</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 *__ao2_alloc(size_t data_size, ao2_destructor_fn destructor_fn, unsigned int options);</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cp">#define ao2_ref1(obj)<span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span>\</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;">This is a useful macro to have, but I think it needs a name that differentiates it from ao2_ref much as ao2_cleanup differentiates itself from ao2_ref. Maybe ao2_bump? Since this would be breaking with the ao2_ref naming, NULL-safety would also be nice.</pre>
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<p>On August 12th, 2013, 11:34 a.m. CDT, <b>David Lee</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;">How about ao2_refbump?
You didn't like NULL safety the last time I tried to put in this macro :-P
https://reviewboard.asterisk.org/r/2579/</pre>
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<p>On August 12th, 2013, 1:51 p.m. CDT, <b>opticron</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;">As long as it isn't ao2_ref*, breaking from that behavior is fine. For ao2_refbump, I'd say no.</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;">Okay; I'd buy that.</pre>
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<p>- David</p>
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<p>On August 12th, 2013, 11:51 a.m. CDT, David Lee wrote:</p>
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<div>Review request for Asterisk Developers and Matt Jordan.</div>
<div>By David Lee.</div>
<p style="color: grey;"><i>Updated Aug. 12, 2013, 11:51 a.m.</i></p>
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<b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>
<a href="https://issues.asterisk.org/jira/browse/ASTERISK-22243">ASTERISK-22243</a>
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<b style="color: #575012; font-size: 10pt;">Repository: </b>
Asterisk
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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;">Change r395954 reordered some stasis object destruction, which should
have been fine. Unfortunately, it caused some hard to reproduce issues
related to objects being accessed after they had been destroyed. The
patch in r396329 fixed the destruction order problem; this patch
addresses the underlying issue. A few other stasis-related fixes were
also added.
* Add ref-bumps around areas where objects may get transitively
destroyed. (For example, where we lock a topic, unref a subscription,
which unrefs the topic, which explodes the topic when we try to
unlock it.)
* Wrote an extensive doxygen page about Stasis implementation,
relationships between objects, lifecycles of objects, how the
refcounting works, etc. Many other comments were added, corrected, or
cleaned up.
* Added an assert to the topic dtor to catch extra ref decrements.
* Fixed type used after destruction errors for graceful shutdown in
stasis_channels.c.
* I added two unit tests in an attempt to catch destruction order
issues. Since the underlying cause is a race condition, though, the
tests rarely failed even when the code was wrong.
* Fixed a leak in stasis_cache_pattern.c.</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;">Unit tests pass.
Reverted r396329, ran unit tests and scenarios that seemed to aggravate the race
condition without error.
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>/trunk/include/asterisk/astobj2.h <span style="color: grey">(396357)</span></li>
<li>/trunk/main/stasis.c <span style="color: grey">(396357)</span></li>
<li>/trunk/main/stasis_cache.c <span style="color: grey">(396357)</span></li>
<li>/trunk/main/stasis_cache_pattern.c <span style="color: grey">(396357)</span></li>
<li>/trunk/main/stasis_channels.c <span style="color: grey">(396357)</span></li>
<li>/trunk/tests/test_stasis.c <span style="color: grey">(396357)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/2746/diff/" style="margin-left: 3em;">View Diff</a></p>
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