RanSeed.h

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#ifndef RanSeed_h
#define RanSeed_h

extern "C" { void* ranseed_address_(void); }

class RanSeed
{
public:
    RanSeed();
    ~RanSeed();
    
    int&        nseed   (void);
    
private: 

    struct RANSEED;
    friend struct RANSEED;

    struct RANSEED
    {
        int     nseed;
    };

    static RANSEED* _ranseed;
};

// set pointer to zero at start
RanSeed::RANSEED* RanSeed::_ranseed =0;

inline
RanSeed::RanSeed()
{}

inline
RanSeed::~RanSeed()
{}

inline int&
RanSeed::nseed  (void)
{
    if (!_ranseed) _ranseed = static_cast<RANSEED*>(ranseed_address_());
    return _ranseed->nseed;
}

#endif