If you're the kind of person who rather reads source code than
documentation, you might also be interested in my meta-circular
implementation of Clojure's STM (it implements refs in terms of atoms):
https://github.com/tvcutsem/stm-in-clojure (the vanilla MVCC version is
200 LoC)
Cheers,
Tom
That looks great, Tom, thanks - I'll definitely spend some time exploring
that.
Cheers,
Colin
On 3 June 2013 19:55, Tom Van Cutsem tomvc...@gmail.com wrote:
If you're the kind of person who rather reads source code than
documentation, you might also be interested in my meta-circular
Mark Volkmann has a very comprehensive article on Clojure's STM available here:
http://java.ociweb.com/mark/stm/
Cheers,
Michał
On 31 May 2013 13:31, Stefan Kamphausen ska2...@gmail.com wrote:
You may want to use the code from https://gist.github.com/Chouser/456326 to
study how the history
You may want to use the code from https://gist.github.com/Chouser/456326 to
study how the history in refs works. See the accompanying discussion at
http://clojure-log.n01se.net/date/2010-06-28.html. I've been using
variants of that stress test to explain the ref history behavior since then
(def my-ref (ref 1))
(defn update-my-ref
[new-value]
(dosync
(alter my-ref #(+ % new-value))
(ref-history-count my-ref)))
Hi guys ;
I am trying to understand (ref-history-count ref) . I thought it counts the
number of old values in the ref. But in all my tests, its always
ref-count only increment when one of the following occurs:
* min-history 0
* ref-read-faults 0 current-ref-history-count max-history-count.
;; ref-count increment because min-history 0
(let [r (ref 1 :min-history 1)
f1 (future (dosync (Thread/sleep 1000)
On Thu, May 30, 2013 at 3:05 PM, Josh Kamau joshnet2...@gmail.com wrote:
I am trying to understand (ref-history-count ref) . I thought it counts
the number of old values in the ref. But in all my tests, its always
returning zero. How is it used?
In clojure's STM, history is created only
Thanks guys. I have been able to get the ref-history-count greater than 0
by increasing ref-min-history to something greater than 0 and by using long
(using Thread/sleep) running transactions.
Now i get it
Josh
On Thu, May 30, 2013 at 6:01 PM, Neale Swinnerton ne...@isismanor.comwrote:
On
