> Hi,
>
> [disclojure]: I've asked about this on SO, but figured out what was happening
> myself[1] and that led to this enquiry.
>
>
> It seems that the consistency of refs within an STM transaction (dosync)
> depends on whether the ref has history.
>
> So if you create 2 refs and then read them in a transaction they could be
> inconsistent with each other. i.e they won't necessarily return the value the
> ref had at the start of the transaction.
> However, if you give the refs some history by updating them in a prior
> transaction, then the two refs will be consistent with each other in
> subsequent transactions.
>
> This seems rather dangerous to me. Is there a rational for not creating at
> least 1 history entry for a ref at ref creation time.
>
> Neale
> {t: @sw1nn, w: sw1nn.com }
>
>
> [1]
> http://stackoverflow.com/questions/10178639/are-refs-really-consistent-within-a-stm-transaction
Hi Neale,
Your example does not appear to match your conclusion. It shows that a
transaction restarts, and that the reads are all consistent as of the restarted
transaction.
Cheers,
Stu
Stuart Halloway
Clojure/core
http://clojure.com
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