/*

* 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;

namespace SymbianUtils

{

	public class DisposableObject : IDisposable

	{

		#region Constructors

		public DisposableObject()

		{

		}

		~DisposableObject()

		{

			// Not allowed to access managed resources from

			// within a C# destructor (in this context we are being

			// called by the GC and it will take care of disposing of

			// other managed resources for us).

			Cleanup( false, true );

		}

		#endregion

        #region Properties

        public bool HaveBeenDisposedOf

        {

            get { return iHaveBeenDisposedOf; }

        }

        #endregion

        #region API - Cleanup Framework

        protected virtual void CleanupManagedResources()

        {

        }

        protected virtual void CleanupUnmanagedResources()

        {

        }

        #endregion

        #region From IDisposable

        public void Dispose()

		{

			// In this situation, we are programatically being asked to

			// release all resources, including managed ones.

			Cleanup( true, true );

			// Take yourself off the Finalization queue 

			// to prevent finalization code for this object

			// from executing a second time.

			GC.SuppressFinalize( this );

		}

		#endregion

		#region Internal methods

		private void Cleanup( bool aReleaseManagedResources, bool aReleaseUnmanagedResources )

		{

            lock( this )

            {

                if ( iHaveBeenDisposedOf == false )

                {

                    try

                    {

                        if ( aReleaseManagedResources )

                        {

                            CleanupManagedResources();

                        }

                        if ( aReleaseUnmanagedResources )

                        {

                            CleanupUnmanagedResources();

                        }

                        iHaveBeenDisposedOf = true;

                    }

                    catch

                    {

                    }

                }

			}

		}

		#endregion

		#region Data members

		private bool iHaveBeenDisposedOf = false;

		#endregion

	}

}