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This is an automatically generated e-mail. To reply, visit:
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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 approach is much simpler and easier to understand than previous attempts. Since it is more general it could be used to avoid mutual ref issues such as between the stasis_topic and stasis_subscription as described in main/stasis.c.
All of the issues I've pointed out are minor.</pre>
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<a href="https://reviewboard.asterisk.org/r/4108/diff/5/?file=71779#file71779line594" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/include/asterisk/astobj2.h</a>
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(Diff revision 5)
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm">/*! \brief Declare a struct to be allocated by ao2_weakproxy_alloc.</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> *</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * \param type Name to use for the struct.</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * \param fields User defined fields.</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> */</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">#define AO2_WEAKPROXY(type, fields) \</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"><span class="tb"> </span>struct type { \</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"><span class="tb"> </span><span class="tb"> </span>struct ao2_weakproxy __weakproxy##__LINE__; \</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"><span class="tb"> </span><span class="tb"> </span>fields \</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"><span class="tb"> </span>}</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;">You could do it this way:
/*! \brief Macro which must be used at the beginning of each sorcery capable object */
#define SORCERY_OBJECT(details) \
struct { \
struct ast_sorcery_object_details details; \
} \
This way you aren't using a macro that alters the declaration syntax.
Need to document that principle intent of user defined fields on weak proxy object structs is to serve as immutable container keys for the real object.</pre>
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<a href="https://reviewboard.asterisk.org/r/4108/diff/5/?file=71779#file71779line636" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/include/asterisk/astobj2.h</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="kt">int</span> <span class="nf">__ao2_weakproxy_set_object</span><span class="p">(</span><span class="kt">void</span> <span class="o">*</span><span class="n">weakproxy</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">obj</span><span class="p">,</span> <span class="kt">int</span> <span class="n">locked</span><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;">Why not use the OBJ_NOLOCK flag?</pre>
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<a href="https://reviewboard.asterisk.org/r/4108/diff/5/?file=71779#file71779line649" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/include/asterisk/astobj2.h</a>
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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="o">*</span><span class="nf">__ao2_weakproxy_get_object</span><span class="p">(</span><span class="kt">void</span> <span class="o">*</span><span class="n">weakproxy</span><span class="p">,</span> <span class="kt">int</span> <span class="n">locked</span><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;">Why not use the OBJ_NOLOCK flag?</pre>
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<a href="https://reviewboard.asterisk.org/r/4108/diff/5/?file=71779#file71779line671" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/include/asterisk/astobj2.h</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="kt">int</span> <span class="nf">__ao2_weakproxy_subscribe</span><span class="p">(</span><span class="kt">void</span> <span class="o">*</span><span class="n">weakproxy</span><span class="p">,</span> <span class="n">ao2_weakproxy_notification_cb</span> <span class="n">cb</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">data</span><span class="p">,</span> <span class="kt">int</span> <span class="n">locked</span><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;">Why not use the OBJ_NOLOCK flag?</pre>
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<a href="https://reviewboard.asterisk.org/r/4108/diff/5/?file=71779#file71779line689" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/include/asterisk/astobj2.h</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * if it was subscribed multiple times it must be unsubscribed as</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * many.</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;">...as many times.</pre>
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<a href="https://reviewboard.asterisk.org/r/4108/diff/5/?file=71779#file71779line692" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/include/asterisk/astobj2.h</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="kt">int</span> <span class="nf">__ao2_weakproxy_unsubscribe</span><span class="p">(</span><span class="kt">void</span> <span class="o">*</span><span class="n">weakproxy</span><span class="p">,</span> <span class="n">ao2_weakproxy_notification_cb</span> <span class="n">cb</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">data</span><span class="p">,</span> <span class="kt">int</span> <span class="n">locked</span><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;">Why not use the OBJ_NOLOCK flag?</pre>
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<a href="https://reviewboard.asterisk.org/r/4108/diff/5/?file=71780#file71780line59" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/astobj2.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">struct __priv_data {</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="cm">/*! This field is used for astobj2 and ao2_weak objects to reference each other */</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="kt">void</span> <span class="o">*</span><span class="n">weakptr</span><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;">For alignment purposes, this should be grouped with the other pointer (destructor_fn).
Also ao2_weak -> ao2_weakproxy</pre>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">struct __priv_data {</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_CHECK_MAGIC(p) (AO2_MAGIC != (p->priv_data.magic | 1))</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;">How about renaming to:
IS_AO2_MAGIC_BAD()
if (IS_AO2_MAGIC_BAD()) {
ast_log(LOG_ERROR, "Bad magic number\n")
}</pre>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static int internal_ao2_ref(void *user_data, int delta, const char *file, int line, const char *func)</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">431</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="k">if</span> <span class="p">(</span><span class="n">delta</span> <span class="o"><</span> <span class="mi">0</span> <span class="o">&&</span> <span class="n">obj</span><span class="o">-></span><span class="n">priv_data</span><span class="p">.</span><span class="n">magic</span> <span class="o">==</span> <span class="n">AO2_MAGIC</span> <span class="o">&&</span> <span class="p">(</span><span class="n">weakproxy</span> <span class="o">=</span> <span class="n">ao2_bump</span><span class="p">(</span><span class="n">obj</span><span class="o">-></span><span class="n">priv_data</span><span class="p">.</span><span class="n">weakptr</span><span class="p">)))</span> <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;">Bumping weakproxy is not necessary here. It is just done as a convienience to later coding.
There is an expense to ast_atomic_fetchadd_int() because of syncing processors.</pre>
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<a href="https://reviewboard.asterisk.org/r/4108/diff/5/?file=71780#file71780line450" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/astobj2.c</a>
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(Diff revision 5)
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static int internal_ao2_ref(void *user_data, int delta, const char *file, int line, const char *func)</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">450</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="n">obj</span><span class="o">-></span><span class="n">priv_data</span><span class="p">.</span><span class="n">ref_counter</span><span class="o">++</span><span class="p">;</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">451</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="n">internal_weakproxy</span><span class="o">-></span><span class="n">priv_data</span><span class="p">.</span><span class="n">weakptr</span> <span class="o">=</span> <span class="n">obj</span><span class="o">-></span><span class="n">priv_data</span><span class="p">.</span><span class="n">weakptr</span> <span class="o">=</span> <span class="nb">NULL</span><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;">Isn't the shell game you are playing with the real object's ref count going to mess up the DEBUG_REF output?
How about this code:
Code assumes that weakproxy ref wasn't bumped when set above.
if weakproxy
if current_value == 1
unlink real and weak
unlock weakproxy
if current_value == 1
run weakproxy callbacks (locking between each callback or locking to run all)
unref weakproxy
unref real</pre>
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<a href="https://reviewboard.asterisk.org/r/4108/diff/5/?file=71780#file71780line798" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/astobj2.c</a>
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(Diff revision 5)
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">798</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="n">weakproxy</span> <span class="o">=</span> <span class="n">ao2_alloc</span><span class="p">(</span><span class="n">data_size</span><span class="p">,</span> <span class="n">destructor_fn</span><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;">I think you need to have a weakproxy destructor callback that performs a sanity check on the proxy object to ensure that it is not still linked with a real object.
Or even better, make the ao2_ref code do this check when it is about to destroy a weakproxy object. This check can also destroy anything in the notify list for the case if the real object was not set but subscribers were.</pre>
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<a href="https://reviewboard.asterisk.org/r/4108/diff/5/?file=71780#file71780line813" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/astobj2.c</a>
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(Diff revision 5)
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">813</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">weakproxy_internal</span> <span class="o">||</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">814</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span> <span class="n">weakproxy_internal</span><span class="o">-></span><span class="n">priv_data</span><span class="p">.</span><span class="n">magic</span> <span class="o">!=</span> <span class="n">AO2_WEAK</span><span class="p">)</span> <span class="p">{</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">815</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span><span class="k">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">816</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="p">}</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">817</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">818</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">obj_internal</span> <span class="o">||</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">819</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span> <span class="n">obj_internal</span><span class="o">-></span><span class="n">priv_data</span><span class="p">.</span><span class="n">weakptr</span> <span class="o">||</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">820</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span> <span class="n">obj_internal</span><span class="o">-></span><span class="n">priv_data</span><span class="p">.</span><span class="n">magic</span> <span class="o">!=</span> <span class="n">AO2_MAGIC</span><span class="p">)</span> <span class="p">{</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">821</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span><span class="k">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">822</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><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;">Format nit, break lines at weaker binary operations and put the operation at the beginning of the indented new line:
if (!weakproxy_internal
|| weakproxy_internal->priv_data.magic != AO2_WEAK) {
return -1;
}
if (!obj_internal
|| obj_internal->priv_data.weakptr
|| obj_internal->priv_data.magic != AO2_MAGIC) {
return -1;
}
This way you aren't as likely to miss the binary operator because it isn't hiding at the end of a possibly still long line.
And don't use spaces for indentation.</pre>
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<a href="https://reviewboard.asterisk.org/r/4108/diff/5/?file=71780#file71780line828" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/main/astobj2.c</a>
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(Diff revision 5)
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">828</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="k">if</span> <span class="p">(</span><span class="n">weakproxy_internal</span><span class="o">-></span><span class="n">priv_data</span><span class="p">.</span><span class="n">weakptr</span><span class="p">)</span> <span class="p">{</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">829</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span><span class="k">goto</span> <span class="n">weakproxy_unlock</span><span class="p">;</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">830</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="p">}</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">831</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">832</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="n">ao2_ref</span><span class="p">(</span><span class="n">obj</span><span class="p">,</span> <span class="o">+</span><span class="mi">1</span><span class="p">);</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">833</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="n">ao2_ref</span><span class="p">(</span><span class="n">weakproxy</span><span class="p">,</span> <span class="o">+</span><span class="mi">1</span><span class="p">);</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">834</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">835</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="n">weakproxy_internal</span><span class="o">-></span><span class="n">priv_data</span><span class="p">.</span><span class="n">weakptr</span> <span class="o">=</span> <span class="n">obj</span><span class="p">;</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">836</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="n">obj_internal</span><span class="o">-></span><span class="n">priv_data</span><span class="p">.</span><span class="n">weakptr</span> <span class="o">=</span> <span class="n">weakproxy</span><span class="p">;</span></pre></td>
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<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="n">ret</span> <span class="o">=</span> <span class="mi">0</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">weakproxy_unlock:</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;">I don't see that this goto really helps here.
Invert the test and pull the skipped code into the then block.</pre>
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<a href="https://reviewboard.asterisk.org/r/4108/diff/5/?file=71781#file71781line4" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/tests/test_astobj2_weaken.c</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * Copyright (C) 2015, Digium, Inc.</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;">Digium didn't create this file.</pre>
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<a href="https://reviewboard.asterisk.org/r/4108/diff/5/?file=71781#file71781line41" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/tests/test_astobj2_weaken.c</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="k">static</span> <span class="kt">int</span> <span class="n">weakproxydestroyed</span><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;">Value not checked at end of test to ensure that it got destroyed and there were no leaks.</pre>
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<a href="https://reviewboard.asterisk.org/r/4108/diff/5/?file=71781#file71781line59" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/tests/test_astobj2_weaken.c</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="p">(</span><span class="o">*</span><span class="n">i</span><span class="p">)</span><span class="o">++</span><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;">++*i
avoids the need for parentheses and post increment isn't really needed.</pre>
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<a href="https://reviewboard.asterisk.org/r/4108/diff/5/?file=71781#file71781line68" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/tests/test_astobj2_weaken.c</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="kt">void</span> <span class="o">*</span><span class="n">obj</span><span class="p">,</span> <span class="o">*</span><span class="n">obj2</span><span class="p">,</span> <span class="o">*</span><span class="n">strong1</span> <span class="o">=</span> <span class="nb">NULL</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="tb"> </span><span class="k">struct</span> <span class="n">my_weakproxy</span> <span class="o">*</span><span class="n">weakref1</span> <span class="o">=</span> <span class="nb">NULL</span><span class="p">,</span> <span class="o">*</span><span class="n">weakref2</span> <span class="o">=</span> <span class="nb">NULL</span><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;">It is best if you do one declaration per line. There have been numerous times where one of the variables changes type or is deleted.
void *obj;
void *obj2;
void *strong1;</pre>
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<a href="https://reviewboard.asterisk.org/r/4108/diff/5/?file=71781#file71781line90" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/tests/test_astobj2_weaken.c</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span><span class="n">ast_test_status_update</span><span class="p">(</span><span class="n">test</span><span class="p">,</span> <span class="s">"Failed to aquire weakref1.</span><span class="se">\n</span><span class="s">"</span><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;">...alloc weakref1</pre>
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<a href="https://reviewboard.asterisk.org/r/4108/diff/5/?file=71781#file71781line124" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/tests/test_astobj2_weaken.c</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span><span class="tb"> </span><span class="n">ast_test_status_update</span><span class="p">(</span><span class="n">test</span><span class="p">,</span> <span class="s">"Set object to weakref1.</span><span class="se">\n</span><span class="s">"</span><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;">weakref2</pre>
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<a href="https://reviewboard.asterisk.org/r/4108/diff/5/?file=71781#file71781line169" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/tests/test_astobj2_weaken.c</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="tb"> </span><span class="n">ast_test_status_update</span><span class="p">(</span><span class="n">test</span><span class="p">,</span> <span class="s">"Destructor not called the expected number of times.</span><span class="se">\n</span><span class="s">"</span><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;">Destrustor and notifies not called...</pre>
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<p>- rmudgett</p>
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<p>On March 4th, 2015, 3:43 p.m. CST, Corey Farrell wrote:</p>
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<div>Review request for Asterisk Developers, George Joseph and rmudgett.</div>
<div>By Corey Farrell.</div>
<p style="color: grey;"><i>Updated March 4, 2015, 3:43 p.m.</i></p>
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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;">This implements "weak" references. The weakproxy object is a real ao2 with normal reference counting of its own. When a weakproxy is pointed to a normal object they hold references to each other. The normal object is automatically freed when a single reference remains (the weakproxy). The weakproxy also supports subscriptions that will notify callbacks when the normal object is about to be destroyed.</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;">Ran the included test with REF_DEBUG enabled under valgrind. No reference leaks or improper memory access. Though this does not test for races, I don't know of an automated way to do that.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>/trunk/tests/test_astobj2_weaken.c <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/main/astobj2.c <span style="color: grey">(432445)</span></li>
<li>/trunk/include/asterisk/astobj2.h <span style="color: grey">(432445)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/4108/diff/" style="margin-left: 3em;">View Diff</a></p>
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