[issue14976] queue.Queue() is not reentrant, so signals and GC can cause deadlocks

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Are all changes are necessary for this issue or some of them are just an optimization? The patch changes the semantic of public attribute unfinished_tasks. Seems that old unfinished_tasks is new unfinished_tasks + _qsize().

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue14976>
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