Method getTimeSeconds

mgen-cpplib/src/test/cpp/src/OsTime.cpp:36–40

	}

	double getTimeSeconds() {
		LARGE_INTEGER t;
		QueryPerformanceCounter(&t);
		return static_cast<double>(t.QuadPart - m_startTime.QuadPart) / m_frequency.QuadPart;
	}

private:
	LARGE_INTEGER m_frequency;