global random number generator initialisation

[Sigbjorn Finne]

You don't say, but I'm assuming you're using a recent'ish
GHC snapshot. A wibble that prevented the system/standard
RNG from being seeded with a time-varying value was fixed
sometime last week, so 5.04 will have it included.

--sigbjorn

----- Original Message ----- 
From: "Ian Lynagh" <igloo at earth.li>
To: <glasgow-haskell-bugs at haskell.org>
Sent: Thursday, July 04, 2002 14:10
Subject: global random number generator initialisation


> 
> The library report, in "17.3  The global random number generator", says
> 
>     It is initialised automatically in some system-dependent fashion,
>     for example, by using the time of day, or Linux's kernel random
>     number generator.
> 
> However, under Linux "randomIO :: IO Int" seems to generate the same
> values on each run.
> 
>     The IO versions, randomRIO and randomIO, use the global random
>     number generator (see Section 17.3).
> 
> While the report doesn't require it to be set to something pseudo random
> it would be nice if it was. Is there an obvious way to set it to
> something pseudo random in Haskell? The Time module isn't as well
> equiped as it could be for the task.
> 
> 
> Thanks
> Ian
>