Re: [boost] [random] new threefry random engine

Subject: Re: [boost] [random] new threefry random engine
From: Thijs (M.A.) van den Berg (thijs_at_[hidden])
Date: 2014-05-02 14:32:36

> AMDG
> 
> On 05/02/2014 06:49 AM, Thijs van den Berg wrote:
>> 
>> The counter_based_engine design I’m working on (I’ll share an example soon) works with 3 type of random function:

> 
> This is much too complicated.  There should be
> exactly one kind of RandomFunction.  Either pass
> the key always, and make it empty when it isn't
> needed, or store the key in the random function
> and never pass it.
> 
> In Christ,
> Steven Watanabe
> 

From a performance point of view the only option will probably be to never pass instead of always. If we give a random function the same seed interface like a random engine for setting the key then a random function will look a lot like a random engine. If will fill an external output buffer based on scrambling an external input buffer. 

The counter engine adaptor / wrapper will
*  own the input and output container
* manipulate the input container as a counter
* forwards the seeding directly to the random function
* use the output container as a source for generating samples

Would this work for the function in random 123?