|
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Diagnostics.CodeAnalysis;
namespace Aga.Controls
{
/// <summary>
/// High resolution timer, used to test performance
/// </summary>
public static class TimeCounter
{
private static Int64 _start;
/// <summary>
/// Start time counting
/// </summary>
public static void Start()
{
_start = 0;
QueryPerformanceCounter(ref _start);
}
public static Int64 GetStartValue()
{
Int64 t = 0;
QueryPerformanceCounter(ref t);
return t;
}
/// <summary>
/// Finish time counting
/// </summary>
/// <returns>time in seconds elapsed from Start till Finish </returns>
public static double Finish()
{
return Finish(_start);
}
public static double Finish(Int64 start)
{
Int64 finish = 0;
QueryPerformanceCounter(ref finish);
Int64 freq = 0;
QueryPerformanceFrequency(ref freq);
return (finish - start) / (double)freq;
}
[DllImport("Kernel32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool QueryPerformanceCounter(ref Int64 performanceCount);
[DllImport("Kernel32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool QueryPerformanceFrequency(ref Int64 frequency);
}
}
|
By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.
If a file you wish to view isn't highlighted, and is a text file (not binary), please
let us know and we'll add colourisation support for it.
Philip is a Software Architect with severaly years of experience. He studied business IT in the University of Wedel, Germany, and has reached his Masters degree in 2010. Back in 2002, he started his so far best-known software PDFCreator. The second developer joined two years later and since then, both constantly improve this piece of open source software.