homepage

I agree. Please close the ticket.
Thanks,
Patrick
2011年5月3日 Raymond Hettinger <report@bugs.python.org>
>
> Raymond Hettinger <raymond.hettinger@gmail.com> added the comment:
>
> > This line should be protected by acquiring the all_tasks_done lock.
>
> All of three of the condition variables share the same underlying lock.
> The increment occurs only with the lock has been acquired.
>
> > Theoretically, the increment could occur somewhere during task_done()!
>
> I don't understand what you mean. The semantics of task_done() method
> implies that the count gets decremented.
>
> > Personally, I would like the increment to occur *before*
> > instead of *after* _put().
>
> There may be some merit to this but I don't see how it matters much since
> both occur within the context of the same lock being held. A user defined
> method can still add or subtract any number it wants from the unfinished
> task count. The result of +1 -5 is the same as -5 +1.
>
> I'm reluctant to change the order though because the code is already
> published and some user's _put code may be inspecting the unfinished tasks
> count. I wouldn't want to break that code without good reason.
>
> ----------
>
> _______________________________________
> Python tracker <report@bugs.python.org>
> <http://bugs.python.org/issue11987>
> _______________________________________
>