source: trunk/src/random_singleton.cc @ 13

#include "random_singleton.h"

using namespace thep_cpp_tools;

// Static members
//////////////////
bool random_singleton::instance_ = false;
random_singleton* random_singleton::singleobj_ = NULL;


// Constructors and destructors
///////////////////////////////
random_singleton::random_singleton()
{
  const gsl_rng_type* T;
  gsl_rng_env_setup();
  T = gsl_rng_default;
  r_ = gsl_rng_alloc( T );  // Memory is allocated here!
  gen_ = NULL;   // Only to be used in the general purpose distribution
}


random_singleton::~random_singleton()
{
  instance_ = false;
  gsl_rng_free( r_ );
  r_ = NULL;
  if( gen_ != 0 ) gsl_ran_discrete_free( gen_ );
  gen_ = NULL;
}


// Functions (A-Z)
//////////////////
void random_singleton::set_seed( const int& seed )
{
  if( seed < 0 ) 
    {
     gsl_rng_set( r_, time( 0 ) ); 
    }
  else
    {
     gsl_rng_set( r_, seed );
    }
}


random_singleton* random_singleton::get_instance( int seed )
{
  if( !instance_ ) 
    {
     singleobj_ = new random_singleton();
     singleobj_->set_seed( seed );
     instance_ = true;
     return singleobj_;
    }
  else
    {
     return singleobj_;
    }
}