51 lines
1.2 KiB
C#
51 lines
1.2 KiB
C#
|
// <file>
|
|||
|
|
// <copyright see="prj:///doc/copyright.txt"/>
|
|||
|
|
// <license see="prj:///doc/license.txt"/>
|
|||
|
|
// <owner name="David Srbecký" email="dsrbecky@gmail.com"/>
|
|||
|
|
// <version>$Revision: 2210 $</version>
|
|||
|
|
// </file>
|
|||
|
|
|
|||
|
|
using System;
|
|||
|
|
using System.Runtime.InteropServices;
|
|||
|
|
|
|||
|
|
namespace Debugger.Util
|
|||
|
|
{
|
|||
|
|
/// <summary>
|
|||
|
|
/// HighPrecisionTimer can obtain much more accurate time measurement
|
|||
|
|
/// for performace optimization
|
|||
|
|
/// </summary>
|
|||
|
|
public static class HighPrecisionTimer
|
|||
|
|
{
|
|||
|
|
[DllImport("kernel32.dll")]
|
|||
|
|
static extern int QueryPerformanceFrequency(out long frequency);
|
|||
|
|
|
|||
|
|
[DllImport("kernel32.dll")]
|
|||
|
|
static extern int QueryPerformanceCounter(out long count);
|
|||
|
|
|
|||
|
|
static DateTime startTime;
|
|||
|
|
static long startTicks;
|
|||
|
|
|
|||
|
|
static HighPrecisionTimer()
|
|||
|
|
{
|
|||
|
|
startTime = DateTime.Now;
|
|||
|
|
startTicks = Ticks;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
static long Ticks {
|
|||
|
|
get {
|
|||
|
|
long frequency;
|
|||
|
|
long count;
|
|||
|
|
QueryPerformanceFrequency(out frequency);
|
|||
|
|
QueryPerformanceCounter(out count);
|
|||
|
|
return (count / frequency) * TimeSpan.TicksPerSecond + (count % frequency) * TimeSpan.TicksPerSecond / frequency;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public static DateTime Now {
|
|||
|
|
get {
|
|||
|
|
return startTime.AddTicks(Ticks - startTicks);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|