utils_random.cpp

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#include <chrono>

#include <agrum/agrum.h>
#include <agrum/core/utils_misc.h>

#ifdef GUM_NO_INLINE
#  include <agrum/core/utils_random_inl.h>
#endif   // GUM_NO_INLINE

namespace gum {

  // returns the aGrUM's seed used by the std::generators
  unsigned int randomGeneratorSeed() {
    return (unsigned int)((GUM_RANDOMSEED == 0) ? std::chrono::system_clock::now()
                                                     .time_since_epoch()
                                                     .count()
                                                : GUM_RANDOMSEED);
  }


  std::default_random_engine getRandomGenerator(unsigned int seed) {
    std::default_random_engine generator;
    generator.seed(seed ? seed : randomGeneratorSeed());
    return generator;
  }

} /* namespace gum */