generator.hpp

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#ifndef SSMPACK_RANDOM_GENERATOR_HPP
#define SSMPACK_RANDOM_GENERATOR_HPP

#include <random>

namespace ssmkit {
namespace random {

typedef std::mt19937 CoreGenerator;

class Generator {
 private:
  CoreGenerator gen_;
  Generator() {
    // random initialization on construction
    setRandomSeed();
  }

 public:
  static Generator &get() {
    // this is thread local to avoid race condition on gen_
    static thread_local Generator instance;
    return instance;
  }
  CoreGenerator & getGenerator() {return gen_;}
  template<class TSeed>
  void setSeed(TSeed seed) {gen_.seed(seed);}
  void setRandomSeed()
  {
    std::random_device rd;
    gen_.seed(rd());
  }

};

inline void setRandomSeed()
{
  Generator::get().setRandomSeed();
}

template<class TSeed>
void setSeed(TSeed seed)
{
  Generator::get().setSeed(seed);
}

} // namespace random
} // namespace ssmkit


#endif //SSMPACK_RANDOM_GENERATOR_HPP