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This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/2109/">https://reviewboard.asterisk.org/r/2109/</a>
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<p style="margin-top: 0;">On September 12th, 2012, 1:55 p.m., <b>Mark Michelson</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/2109/diff/2/?file=31201#file31201line3583" style="color: black; font-weight: bold; text-decoration: underline;">/branches/1.8/main/channel.c</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; ">int ast_settimeout(struct ast_channel *c, unsigned int rate, int (*func)(const void *data), void *data)</pre></td>
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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="n">ms</span> <span class="o">=</span> <span class="n">timeout_ms</span> <span class="o">-</span> <span class="n">ast_tvdiff_ms</span><span class="p">(</span><span class="n">ast_tvnow</span><span class="p">(),</span> <span class="n">start</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">ms</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</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">ms</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="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;">I was about to comment about how this has a slight semantic change in that passing a negative timeout to ast_waitfordigit_full() no longer would have the same effect as it previously did.
Then I noticed a comment above ast_waitfordigit() in channel.c that says "/* XXX never to be called with ms = -1 */". I also noticed that ast_waitfor_digit[_full]() is never called with a negative timeout. So from all this, I'd say that the semantic change is a positive thing, and the XXX comment should be moved to the header file.</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;">Nah; I don't think we're so lucky. There are a few places where the timeout may be read from configuration (like transferdigittimeout). It's less likely to be trouble to avoid the semantic change of a negative timeout, and remove the XXX comment you mentioned.</pre>
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<p>- David</p>
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<p>On September 12th, 2012, 1:04 p.m., David Lee wrote:</p>
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<div>Review request for Asterisk Developers and Mark Michelson.</div>
<div>By David Lee.</div>
<p style="color: grey;"><i>Updated Sept. 12, 2012, 1:04 p.m.</i></p>
<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;">ast_waitfordigit_full would simply pass its timeout to ast_waitfor_nandfds, expecting it to decrement the timeout by however many milliseconds were waited. This is a problem if it consistently waits less than 1ms, the timeout will never be decremented, and we wait... FOREVER!
This patch instead has ast_waitfordigit_full manage the timeout itself.
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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;">Mark confirmed that with the not-cleaned-up version of this patch, it fixed ASTERISK-20375. The cleanup consisted of changing variable names, adding comments, removing debug logging.</pre>
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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-20375">ASTERISK-20375</a>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>/branches/1.8/main/channel.c <span style="color: grey">(372975)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/2109/diff/" style="margin-left: 3em;">View Diff</a></p>
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