HyFlow.h

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/*
  Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
*/
 
//
// Description:
//      Class definition for HyFlow, which is used
//      to modify HYFLOW common.
 
#ifndef HyFlow_h
#define HyFlow_h
 
#include <cstdint>
 
extern "C" { uintptr_t hyflow_address_(); }
 
class HyFlow {
public:
    HyFlow();
    ~HyFlow();
 
    double&     ytfl    (void);
    double&     ylfl    (void);
    double&     tf  (void);
    double&     fpart   (void);
 
    void    init    (void);
 
private: 
 
    struct HYFLOW;
    friend struct HYFLOW;
 
    struct HYFLOW
    {
      double    ytfl;
      double    ylfl;
      double    tf;
      double    fpart;
    };
 
    static HYFLOW* s_hyflow;
};
 
// set pointer to zero at start
HyFlow::HYFLOW* HyFlow::s_hyflow =0;
 
inline void
HyFlow::init(void)
{ if (!s_hyflow) s_hyflow = reinterpret_cast<HYFLOW*>(hyflow_address_()); }
 
// Constructor
inline
HyFlow::HyFlow()
{}
 
// Destructor
inline
HyFlow::~HyFlow()
{}
 
inline double&
HyFlow::ytfl    (void)
{
    init();
    return s_hyflow->ytfl;
}
 
inline double&
HyFlow::ylfl    (void)
{
    init();
    return s_hyflow->ylfl;
}
 
inline double&
HyFlow::tf  (void)
{
    init();
    return s_hyflow->tf;
}
 
inline double&
HyFlow::fpart   (void)
{
    init();
    return s_hyflow->fpart;
}
 
#endif