[Haskell-cafe] Re: [Haskell] Re: Global Variables and IO initializers

[Keean Schupke]

Adrian Hey wrote:

>The problem is simple enough to restate for anyone who's interested.
>"Provide a simple reliable mechanism to ensure that in a given
> program run one particular top level IO operation cannot be executed
> more than once."
>  
>
No language can guarantee this -  all I have to do is run 2 copies of
the executable at once... or wven sequentially!

Keean.