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#include <iostream>
#include <unistd.h>
#include <math.h>
typedef double vec3_t[3];
#define noinline __attribute__((noinline))
static double dot(vec3_t u, vec3_t v)
{
return u[0]*v[0] + u[1]*v[1] + u[2]*v[2];
}
// Will be livepatched.
static noinline double norm(vec3_t v)
{
return sqrt(dot(v, v));
}
class Point
{
protected:
double x, y;
public:
Point(double x, double y);
double Get_X(void) const;
double Get_Y(void) const;
};
class Point3D : public Point
{
protected:
double z;
public:
Point3D(double x, double y, double z);
double Norm(void);
double Get_Z(void) const;
};
double Point::Get_X(void) const
{
return x;
}
double Point::Get_Y(void) const
{
return y;
}
Point::Point(double x, double y)
{
this->x = x;
this->y = y;
}
Point3D::Point3D(double x, double y, double z) : Point(x, y)
{
this->z = z;
}
double Point3D::Get_Z(void) const
{
return z;
}
double Point3D::Norm(void)
{
vec3_t v = {x, y, z};
return norm(v);
}
extern "C" double some_function(vec3_t v)
{
return norm(v) * norm(v);
}
int main(void)
{
Point3D p(3, 4, 5);
while (1) {
std::cout << p.Norm() << '\n';
sleep(1);
}
return 0;
}
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