[asterisk-dev] [Code Review] app_queue: Makes call_queue objects ao2 objects so ref counting can be done

[David Vossel]

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/branches/1.4/apps/app_queue.c
<https://reviewboard.asterisk.org/r/427/#comment2923>

    not necessary, we do a memset right below this


- David


On 2009-11-12 15:56:40, David Vossel wrote:
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> (Updated 2009-11-12 15:56:40)
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> Review request for Asterisk Developers.
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> Summary
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> In app_queue, it is possible for a call_queue to be destroyed while another object still holds a pointer to it.  This patch converts call_queue objects to ao2 objects allowing them to be ref counted.  This makes it safe for the queue_ent object in queue_exec() to reference it's parent call_queue even after it has left the queue.
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> This addresses bug 15686.
>     https://issues.asterisk.org/view.php?id=15686
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> Diffs
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>   /branches/1.4/apps/app_queue.c 229742 
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> Diff: https://reviewboard.asterisk.org/r/427/diff
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> Testing
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> I developed a situation in which a call_queue would be destroyed after the queue_ent left the queue, but while the queue_ent would still attempt to access it's parent call_queue to do an update_queue() on hangup... This originally caused a horrible crash because the call_queue was already freed.  Now it exits correctly destroying the call_queue right before queue_exec() exits.
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> Thanks,
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> David
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