CloseCollectionAsyncResult.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / ServiceModel / System / ServiceModel / Channels / CloseCollectionAsyncResult.cs / 1 / CloseCollectionAsyncResult.cs

                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------

namespace System.ServiceModel 
{
    using System.Collections.Generic; 
    using System.Threading; 

    class CloseCollectionAsyncResult : AsyncResult 
    {
        bool completedSynchronously;
        Exception exception;
        static AsyncCallback nestedCallback = DiagnosticUtility.ThunkAsyncCallback(new AsyncCallback(Callback)); 
        int count;
 
        public CloseCollectionAsyncResult(TimeSpan timeout, AsyncCallback otherCallback, object state, IList collection) 
            : base(otherCallback, state)
        { 
            TimeoutHelper timeoutHelper = new TimeoutHelper(timeout);
            completedSynchronously = true;

            count = collection.Count; 
            if (count == 0)
            { 
                Complete(true); 
                return;
            } 

            for (int index = 0; index < collection.Count; index++)
            {
                CallbackState callbackState = new CallbackState(this, collection[index]); 
                IAsyncResult result;
                try 
                { 
                    result = collection[index].BeginClose(timeoutHelper.RemainingTime(), nestedCallback, callbackState);
                } 
#pragma warning suppress 56500 // covered by FxCOP
                catch (Exception e)
                {
                    if (DiagnosticUtility.IsFatal(e)) 
                    {
                        throw; 
                    } 

                    Decrement(true, e); 
                    collection[index].Abort();
                    continue;
                }
 
                if (result.CompletedSynchronously)
                { 
                    CompleteClose(collection[index], result); 
                }
            } 
        }

        void CompleteClose(ICommunicationObject communicationObject, IAsyncResult result)
        { 
            Exception closeException = null;
            try 
            { 
                communicationObject.EndClose(result);
            } 
#pragma warning suppress 56500 // covered by FxCOP
            catch (Exception e)
            {
                if (DiagnosticUtility.IsFatal(e)) 
                {
                    throw; 
                } 

                closeException = e; 
                communicationObject.Abort();
            }

            Decrement(result.CompletedSynchronously, closeException); 
        }
 
        static void Callback(IAsyncResult result) 
        {
            if (result.CompletedSynchronously) 
            {
                return;
            }
 
            CallbackState callbackState = (CallbackState)result.AsyncState;
            callbackState.Result.CompleteClose(callbackState.Instance, result); 
        } 

        void Decrement(bool completedSynchronously) 
        {
            if (completedSynchronously == false)
                this.completedSynchronously = false;
            if (Interlocked.Decrement(ref count) == 0) 
            {
                if (this.exception != null) 
                    Complete(this.completedSynchronously, this.exception); 
                else
                    Complete(this.completedSynchronously); 
            }
        }

        void Decrement(bool completedSynchronously, Exception exception) 
        {
            this.exception = exception; 
            this.Decrement(completedSynchronously); 
        }
 
        public static void End(IAsyncResult result)
        {
            AsyncResult.End(result);
        } 

        class CallbackState 
        { 
            ICommunicationObject instance;
            CloseCollectionAsyncResult result; 

            public CallbackState(CloseCollectionAsyncResult result, ICommunicationObject instance)
            {
                this.result = result; 
                this.instance = instance;
            } 
 
            public ICommunicationObject Instance
            { 
                get { return instance; }
            }

            public CloseCollectionAsyncResult Result 
            {
                get { return result; } 
            } 
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
                        

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