PolicyChain.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WCF / infocard / Client / System / IdentityModel / Selectors / PolicyChain.cs / 1305376 / PolicyChain.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------
namespace System.IdentityModel.Selectors
{ 
    using System;
    using System.Collections.Generic; 
    using System.IO; 
    using System.Runtime.InteropServices;
    using System.Text; 
    using System.Xml;

    //
    // For common 
    //
    using Microsoft.InfoCards; 
 
    //
    // Summary: 
    //  This class wraps and manages the lifetime of an array of PolicyElements that are to be Marshaled to
    //  native memory.
    //
    internal class PolicyChain : IDisposable 
    {
        HGlobalSafeHandle m_nativeChain; 
 
        InternalPolicyElement[] m_chain;
 
        public int Length
        {
            get { return m_chain.Length; }
        } 

        public PolicyChain( CardSpacePolicyElement[ ] elements ) 
        { 
            int length = elements.Length;
 
            m_chain = new InternalPolicyElement[ length ];

            for( int i = 0; i < length; i++ )
            { 
                m_chain[  i ] = new InternalPolicyElement( elements[ i ] );
            } 
        } 

        public SafeHandle DoMarshal() 
        {
            if( null == m_nativeChain )
            {
                int elementSize = InternalPolicyElement.Size; 
                int chainLength = m_chain.Length;
 
 
                m_nativeChain = HGlobalSafeHandle.Construct( chainLength * elementSize );
 
                IntPtr pos = m_nativeChain.DangerousGetHandle();

                foreach( InternalPolicyElement element in m_chain )
                { 
                    element.DoMarshal( pos );
                    unsafe 
                    { 
                        //
                        // All this just to do pos += elementSize 
                        //
                        pos = new IntPtr( (long)( ( (ulong) pos.ToPointer() ) + (ulong) elementSize ) );
                    }
                } 
            }
 
            return m_nativeChain; 
        }
 
        public void Dispose()
        {
            Dispose( true );
        } 

        ~PolicyChain() 
        { 
            Dispose( false );
        } 

        private void Dispose( bool disposing )
        {
            if( disposing ) 
            {
                GC.SuppressFinalize( this ); 
            } 

            if( null != m_chain ) 
            {
                foreach( InternalPolicyElement element in m_chain )
                {
                    if( null != element ) 
                    {
                        element.Dispose(); 
                    } 
                }
                m_chain = null; 
            }

            if( null != m_nativeChain )
            { 
                m_nativeChain.Dispose();
            } 
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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