XmlTestTimer.cs :  » GIS » NetTopologySuite » Open » Topology » TestRunner » C# / CSharp Open Source

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C# / CSharp Open Source » GIS » NetTopologySuite 
NetTopologySuite » Open » Topology » TestRunner » XmlTestTimer.cs
using System.ComponentModel;
using System.Runtime.InteropServices;
using System.Threading;

namespace Open.Topology.TestRunner{
    public class XmlTestTimer
    {
        [DllImport("Kernel32.dll")]
        private static extern bool QueryPerformanceCounter(out long lpPerformanceCount);  

    [DllImport("Kernel32.dll")]
    private static extern bool QueryPerformanceFrequency(out long lpFrequency);
    
    private long startTime, stopTime;
    private long freq;
    
        // Constructor
    public XmlTestTimer()
    {
            startTime = 0;
            stopTime  = 0;

            if (QueryPerformanceFrequency(out freq) == false)
            {
                // high-performance counter not supported 
                throw new Win32Exception(); 
            }
    }
    
    // Start the timer
    public void Start()
    {
            // lets do the waiting threads there work
            Thread.Sleep(0);  

      QueryPerformanceCounter(out startTime);
    }
    
    // Stop the timer
    public void Stop()
    {
        QueryPerformanceCounter(out stopTime);
    }
    
    // Returns the duration of the timer (in seconds)
        public double Duration
        {
          get
          {
              return (double)(stopTime - startTime) / (double) freq;
            }
        }
  }
}
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