[karmakaze]

I was thinking along the same lines. Is an "atom" in Clojure like STM where the structure/reference is changed in a highly controlled manner?

[Sinidir]

atoms are containers that require no coordination so its a simple Compare and swap. There are Refs that require transactions and change of multiple Refs is coordinated in these transactions. WIth that Clojure has an implementation of Software Transaction Memory.