Module State

The functions from module State manipulate the current state of the random generator explicitely. This allows using one or several deterministic PRNGs, even in a multi-threaded program, without interference from other parts of the program.

Signature

type t

val default : t

val make : int array -> t

Create a new state and initialize it with the given seed.

val make_self_init : ?allow_in_tests:bool -> unit -> t

Create a new state and initialize it with a system-dependent low-entropy seed.

val copy : t -> t

val bits : t -> int

These functions are the same as the basic functions, except that they use (and update) the given PRNG state instead of the default one.

val int : t -> int -> int

val int32 : t -> Int32.t -> Int32.t

val nativeint : t -> Nativeint.t -> Nativeint.t

val int64 : t -> Int64.t -> Int64.t

val float : t -> float -> float

val bool : t -> bool