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Why shouldn't I use it?

You should, I misread your answer actually (I thought you said the hash would prevent the deletion of the handles), I agree with you that this feature is useful.

But! returning a weakened reference from get_fds is a good idea. Thank you.

Adding it at the last moment, or storing it as a member as soon as the handle is opened (even if that means having two weak reference to the same handle in nearly the same place) is pretty much the same thing. There's a difference when you return $fd => { fd => $fd, %{$fd{$_}} } rather than id_2obj($_) => $fd{$_} though, in the first case, if the user keeps the hashref, it will always have the values it had when acquired, while in the latter, the "close" and "closetime" value will appear when the handle is closed. I like the first version better, because you have to call get_fds to get up-to-date information.

In reply to Re^5: Track open file handles by Eily
in thread Track open file handles by shmem

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