C:/Users/Andreas Schiffler/Desktop/SVN/NewGamePhysics/NewGamePhysics/Utilities/HighResolutionTimer.cs

//-----------------------------------------------------------------------------
// HighResolutionTimer.cs
// (A. Schiffler, 2009)
//-----------------------------------------------------------------------------

namespace NewGamePhysics.Utilities
{
    using System;
    using System.ComponentModel;
    using System.Runtime.InteropServices;
    using System.Threading;

    public class HighResolutionTimer
    {
        [DllImport("Kernel32.dll")]
        private static extern bool QueryPerformanceCounter(
            out long lpCounter);

        [DllImport("Kernel32.dll")]
        private static extern bool QueryPerformanceFrequency(
            out long lpFrequency);

        public static long Counter()
        {
            long counter;

            if (!QueryPerformanceCounter(out counter))
            {
                throw new Win32Exception("Error calling QueryPerformanceCounter()");
            }

            return counter;
        }

        public static long Frequency()
        {
            long frequency;

            if (!QueryPerformanceFrequency(out frequency))
            {
                throw new Win32Exception("Error calling QueryPerformanceFrequency()");
            }

            return frequency;
        }

        public static double Seconds()
        {
            return (double)Counter() / (double)Frequency();
        }
    }
}

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