Re: [Haskell-cafe] MVar which can not be null ?

* s9gf4ult [2013-03-18 13:07:04+0600]

Hello, I am looking for MVar which can not be null. I need some kind of thread save atomic IO operation like I can do with modifyMVar, but I want this variable always contain some value and never be null. Thanks.

Wrap it into a newtype and export only those operations that keep it non-empty. Roman