[Haskell-cafe] thread safety, IO arrays, and IO refs

[Edward Z. Yang]

If you need multithreaded mutable arrays, TArray may be
a better choice, as the underlying stm implementation will manage locking
for you.  (The current implementation isn't terribly efficient, but when
it gets better you'll get it for free too :-)

http://hackage.haskell.org/packages/archive/stm/2.2.0.1/doc/html/Control-Concurrent-STM-TArray.html

Edward