[rabbitmq-discuss] Are there any unused delivery tag values?

[David Wragg]

Hi Lowell,

<Lowell.Boggs at emc.com> writes:
> Delivery tags are uint64_t data.
>
> Is zero a valid delivery tag?  Is (uint64_t)(-1)?
>
> I'm interested in knowing whether I need to keep extra bools laying
> around to keep track of the "has been auto-acked" or not flag.