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TLS: An exercise in concurrent programming

, 11 May 2008 CPOL
A walkthough about multi-threading an app and a useful helper class
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
using System.Windows.Threading;

namespace TLS
{

	//=============================================================================================

	class Controller
	{
		public TestInfo TestInfo { get; private set; }
		public TestBase TestBase { get; private set; }

		Stopwatch _Stopwatch = new Stopwatch();
		TimeSpan _Start = TimeSpan.Zero;
		TimeSpan _Finish = TimeSpan.Zero;

		public Controller( TestInfo test )
		{
			TestInfo = test;

			TestBase = TestInfo.Create();

			TestBase.Finished += new EventHandler( TestBase_Finished );
		}

		public int Percent
		{
			get
			{
				return ( int ) ( 100 * TestBase.Done / TestBase.TotalWork );
			}
		}

		public void Run()
		{
			_Stopwatch.Reset();
			_Stopwatch.Start();
			_Start = _Stopwatch.Elapsed;

			TestBase.Run();
		}

		void TestBase_Finished( object sender, EventArgs e )
		{
			_Finish = _Stopwatch.Elapsed;

			TestInfo.Dispatcher.Invoke( DispatcherPriority.Normal, ( Action ) delegate { TestInfo.IterationsPerSecond = IterationsPerSecond; } );
			TestInfo.Dispatcher.Invoke( DispatcherPriority.Normal, ( Action ) delegate { TestInfo.IterationsPerSecondPerCore = IterationsPerSecondPerCore; } );

			RaiseFinished();
		}

		public event EventHandler Finished;

		public void RaiseFinished()
		{
			var d = Finished;
			if ( d != null ) d( null, EventArgs.Empty );
		}

		int IterationsPerSecond
		{
			get
			{
				return ( int ) ( TestBase.Done / ( _Finish - _Start ).TotalSeconds );
			}
		}

		int IterationsPerSecondPerCore
		{
			get
			{
				if ( !TestBase.Multithreaded ) return IterationsPerSecond;

				return IterationsPerSecond / Environment.ProcessorCount;
			}
		}

	}

	//=============================================================================================

}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Nicholas Butler

United Kingdom United Kingdom

I built my first computer, a Sinclair ZX80, on my 11th birthday in 1980.
In 1992, I completed my Computer Science degree and built my first PC.
I discovered C# and .NET 1.0 Beta 1 in late 2000 and loved them immediately.
I have been writing concurrent software professionally, using multi-processor machines, since 1995.
 
In real life, I have spent 3 years travelling abroad,
I have held a UK Private Pilots Licence for 20 years,
and I am a PADI Divemaster.
 
I now live near idyllic Bournemouth in England.
 
If you would like help with multithreading, please contact me via my website:
 
 
I can work 'virtually' anywhere!

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