G'day.
Quoting Petter Egesund <petter.egesund at kunnskapsforlaget.no>:
> Does anybody know about a mutable hash implementation for ghc?
How about three of them?
http://cvs.sourceforge.net/viewcvs.py/haskell-libs/libs/hashtable/
They're all concurrency-safe.
Cheers,
Andrew Bromage