Data.RNG

Convenience thread-safe wrapper around mwc-random library for practical supply of random numbers in a concurrent environment.

Documentation

data RNG

High speed, mutable random number generator state

mkRNG :: IO RNG

Create a new RNG in the IO monad using withSystemRandom.

seedRNG :: [Word32] -> IO RNG

Create a new RNG with a user-specified seed.

packRNG :: GenIO -> IO RNG

Pack your own rng into the RNG type.

withRNG :: RNG -> (GenIO -> IO a) -> IO a

Perform given action, mutating the RNG state underneath.

randomToken :: Int -> RNG -> IO ByteString

Generates a random salt of given length

Re-export MWC for convenience.

module System.Random.MWC