Re: [Boost-users] Mersenne twister problem

Subject: Re: [Boost-users] Mersenne twister problem
From: Matthias Troyer (troyer_at_[hidden])
Date: 2009-09-11 15:02:25

On 11 Sep 2009, at 11:19, ruya wrote:

>
> Hello
>
> I've built a meta-heuristics library in which I use the boost random
> library. I am using several independent generators through the  
> application.
> The problem is in the core of my library. The tricky part is that I  
> have
> three different algorithms using the core, all of them using the  
> class where
> a segmentation fault happens, but only one of them crashes when it  
> tries to
> use the class, the others run as expected. Gdb points to the boost  
> library,
> as you can see in the snippet bellow. I couldn't find any  
> information on
> this issue, and I cannot see something wrong with my code (the  
> relevant part
> is bellow).
>
> The parent class where generators are declared:
>
> template< class SType, typename MemP >
> class SearchFunctor{
>    (...)
>  public:
>
>    virtual SPtr operator()( SPtr s, int iter ) = 0;
>
>    SearchFunctor(){
>      (...)
>      //This is how I initialize teh generators, being MASTER SEED 666
>      generator1 = base_generator_type(MASTER_SEED*13);
>      uni_dist1 = boost::uniform_real<>(0,1);
>      uniEmp = new GeneratorI(generator1, uni_dist1);
>      generator2 = base_generator_type(MASTER_SEED*17);
>      uni_dist2 = boost::uniform_real<>(0,1);
>      uniRes = new GeneratorI(generator2, uni_dist2);
>    }
>  protected:
>    base_generator_type generator1, generator2;
>    boost::uniform_real<> uni_dist1, uni_dist2;
>    GeneratorI* uniEmp;
>    GeneratorI* uniRes;
> };

I would write this very differently, and can give you a better version  
that should have no problems, but could you please send me the  
definition of GeneratorI first?

Matthias