38 lines
651 B
C
38 lines
651 B
C
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#pragma once
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#include <windows.h>
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struct CpuTimer
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{
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void Start()
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{
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QueryPerformanceCounter(&m_start);
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}
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void Stop()
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{
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QueryPerformanceCounter(&m_stop);
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}
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// Returns elapsed time in milliseconds (ms)
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double Elapsed()
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{
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return (m_stop.QuadPart - m_start.QuadPart - m_overhead) * 1000.0 / m_freq.QuadPart;
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}
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private:
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// Returns the overhead of the timer in ticks
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static LONGLONG GetOverhead()
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{
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CpuTimer t;
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t.Start();
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t.Stop();
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return t.m_stop.QuadPart - t.m_start.QuadPart;
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}
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LARGE_INTEGER m_start;
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LARGE_INTEGER m_stop;
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static LARGE_INTEGER m_freq;
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static LONGLONG m_overhead;
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};
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