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Fix a race condition where the generator can go away
(closes issue #12175, reported by edantie, patched by me) git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@107099 65c4cc65-6c06-0410-ace0-fbb531ad65f3
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@@ -1560,9 +1560,13 @@ static int generator_force(const void *data)
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ast_channel_lock(chan);
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tmp = chan->generatordata;
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chan->generatordata = NULL;
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generate = chan->generator->generate;
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if (chan->generator)
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generate = chan->generator->generate;
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ast_channel_unlock(chan);
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if (!tmp || !generate)
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return 0;
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res = generate(chan, tmp, 0, 160);
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chan->generatordata = tmp;
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