--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/crashanalysercmd/PerfToolsSharedLibraries/Engine/SymbianUtils/TextUtilities/Readers/Types/Binary/AsyncBinaryFileReader.cs	Thu Feb 11 15:50:58 2010 +0200
@@ -0,0 +1,172 @@
+/*
+* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+* 
+* Description:
+*
+*/
+using System;
+using System.IO;
+using System.Text;
+using System.Threading;
+using System.Collections;
+
+namespace SymbianUtils
+{
+	public abstract class AsyncBinaryFileReader : AsyncBinaryReaderBase
+	{
+		#region Construct & destruct
+		public AsyncBinaryFileReader( string aFileName )
+			: this( aFileName, KDefaultReadChunkSize )
+		{
+		}
+
+		public AsyncBinaryFileReader( string aFileName, int aReadChunkSize )
+		{
+			iSourceFileName = aFileName;
+			iReadChunkSize = aReadChunkSize;
+		}
+		#endregion
+
+		#region Constants
+		public const int KDefaultReadChunkSize = 512;
+		#endregion
+
+		#region Properties
+		public string FileName
+		{
+			get
+			{
+				string fileName = string.Empty;
+				//
+				lock( this )
+				{
+					fileName = iSourceFileName;
+				}
+				//
+				return fileName; 
+			}
+		}
+
+		protected BinaryReader Reader
+		{
+			get { return iReader; }
+		}
+		#endregion
+
+		#region New API
+		protected virtual void HandleReaderOpen()
+		{
+		}
+		#endregion
+
+		#region From DisposableObject - Cleanup Framework
+		protected override void CleanupManagedResources()
+		{
+			try
+			{
+				Cleanup();
+			}
+			finally
+			{
+				base.CleanupManagedResources();
+			}
+		}
+		#endregion
+
+		#region From AsyncReaderBase
+		protected override void HandleReadStarted()
+		{
+			iReader = new BinaryReader( new FileStream( FileName, FileMode.Open, FileAccess.Read ) );
+			HandleReaderOpen();
+			//
+			base.HandleReadStarted();
+		}
+
+		protected override void HandleReadCompleted()
+		{
+			try
+			{
+				Cleanup();
+			}
+			finally
+			{
+				base.HandleReadCompleted();
+			}
+		}
+		#endregion
+
+		#region Abstract reading framework
+		protected override byte[] ProvideReadBytes()
+		{
+			byte[] ret = iReader.ReadBytes( iReadChunkSize );
+			return ret;
+		}
+
+		protected override long Size
+		{
+			get
+			{
+				long size = 0;
+				//
+				lock( this )
+				{
+					if	( iReader != null && iReader.BaseStream != null )
+					{
+						size = iReader.BaseStream.Length;
+					}
+				}
+				//
+				return size;
+			}
+		}
+
+		protected override long Position
+		{
+			get
+			{
+				long position = 0;
+				//
+				lock( this )
+				{
+					if	( iReader != null && iReader.BaseStream != null )
+					{
+						position = iReader.BaseStream.Position;
+					}
+				}
+				//
+				return position;
+			}
+		}
+		#endregion
+
+		#region Internal methods
+		private void Cleanup()
+		{
+			lock( this )
+			{
+				if	( iReader != null )
+				{
+					iReader.Close();
+					iReader = null;
+				}
+			}
+		}
+		#endregion
+
+		#region Data members
+		private BinaryReader iReader;
+		private readonly int iReadChunkSize;
+		private readonly string iSourceFileName;
+		#endregion
+	}
+}