Re: shm_mq fix for non-blocking mode

On Fri, Oct 16, 2015 at 5:08 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> The shm_mq code handles blocking mode and non-blocking mode
> asymmetrically in a couple of places, with the unfortunate result that
> if you are using non-blocking mode, and your counterparty dies before
> attaching the queue, operations on the queue continue to return
> SHM_MQ_WOULD_BLOCK instead of, as they should, returning
> SHM_MQ_DETACHED. The attached patch fixes the problem. Thanks to my
> colleague Rushabh Lathia for helping track this down.
>
> (There's are some further bugs in this area outside the shm_mq code
> ... but I'm still trying to figure out exactly what they are and what
> we should do about them. This much, however, seems clear-cut.)

...and so I've committed it and back-patched to 9.4.

--
Robert Haas
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