BasicRandom.h

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/* emacs: this is -*- c++ -*- */
 
 
#ifndef   BASICRANDOM_H
#define   BASICRANDOM_H
 
#include <iostream>
 
#include "TRandom3.h"
 
 
namespace Resplot { 
 
class BasicRandom {
 
public:
 
  BasicRandom(int shared=true, int seed=4357)  
    : m_shared(shared), m_random(0) { 
    if ( shared ) { 
      //      static TRandom3 r(seed);
      m_random = &s_random;
      if ( seed!=4357) m_random->SetSeed(seed);
    }
    else {
      //      m_random = new TRandom3(seed);
      m_random = &s_random;
      if ( seed ) m_random->SetSeed(seed);
    } 
  }
  BasicRandom(const BasicRandom &) = delete; //forbid copying
  BasicRandom operator =(const BasicRandom &) = delete; //forbid assignment
  
  //  virtual ~Random() { delete m_rand; } 
  virtual ~BasicRandom() {  if ( !m_shared ) delete m_random; } 
  
  double exp()     { return m_random->Exp(1); } 
  double gauss()   { return m_random->Gaus(); } 
  double uniform() { return m_random->Uniform(); } 
 
 
private:
  
  bool                                m_shared;
  static inline thread_local TRandom3 s_random = {4357};
  TRandom3*                           m_random;
 
};
 
}
 
#endif