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

2 May 2014

      On Fri, May 2, 2014 at 1:26 AM, Steven Watanabe wrote:
...
AMDG
On 04/27/2014 05:39 AM, Mathias Gaunard wrote:
...
With a single, stateless generator, everything is much simpler. One
seed, one generator, completely reproducible results regardless of
scheduling. The interface i want to have is this:
#pragma omp for
for(int i=0; i
The proposed RandomFunction doesn't quite work this
way.  It produces random numbers in blocks.  (For
instance, the threefry engine that started this thread,
uses a 256-bit block size.)
Yes.  But with C++11 initializer lists, random_value is a one-liner:

unsigned random_value(unsigned i){
    return Threefry<2, unsigned>()({i})[0];
}

Without initializer lists, you would need another line for a  declaration
of a domain_type.

Alternatively, you may prefer to let a distribution do the rescaling for
you:

Threefry<2,unsigned> prf;
uniform_real_distribution<float> zero_one(0., 1.);
#omp
for(int i=0; i
...

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

John Salmon