45 lines
1.3 KiB
C#
45 lines
1.3 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Runtime.InteropServices;
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namespace Aiwaz.Common
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{
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public static class HiPerfTimer
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{
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[DllImport("Kernel32.dll")]
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private static extern bool QueryPerformanceCounter(out long performanceCount);
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[DllImport("Kernel32.dll")]
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private static extern bool QueryPerformanceFrequency(out long frequency);
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private static double? startTime;
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private static double lastTime;
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public static double LastDeltaTime
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{
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get;
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private set;
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}
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public static double ElapsedTime
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{
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get
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{
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long frequency, performanceCount;
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QueryPerformanceFrequency(out frequency);
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QueryPerformanceCounter(out performanceCount);
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double thisTime = performanceCount / (double)frequency;
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if (!startTime.HasValue)
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{
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startTime = thisTime;
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lastTime = thisTime;
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return 0.0;
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}
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LastDeltaTime = thisTime - lastTime;
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lastTime = thisTime;
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return thisTime - startTime.Value;
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}
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}
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}
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}
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