OpenCollectionAsyncResult.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 / OpenCollectionAsyncResult.cs / 1 / OpenCollectionAsyncResult.cs
                        

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

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

    internal class OpenCollectionAsyncResult : AsyncResult 
    {
        bool completedSynchronously;
        Exception exception;
        static AsyncCallback nestedCallback = DiagnosticUtility.ThunkAsyncCallback(new AsyncCallback(Callback)); 
        int count;
        TimeoutHelper timeoutHelper; 
 
        public OpenCollectionAsyncResult(TimeSpan timeout, AsyncCallback otherCallback, object state, IList collection)
            : base(otherCallback, state) 
        {
            this.timeoutHelper = new TimeoutHelper(timeout);
            completedSynchronously = true;
 
            count = collection.Count;
            if (count == 0) 
            { 
                Complete(true);
                return; 
            }

            for (int index = 0; index < collection.Count; index++)
            { 
                // Throw exception if there was a failure calling EndOpen in the callback (skips remaining items)
                if (this.exception != null) 
                    throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(this.exception); 
                CallbackState callbackState = new CallbackState(this, collection[index]);
                IAsyncResult result = collection[index].BeginOpen(this.timeoutHelper.RemainingTime(), nestedCallback, callbackState); 
                if (result.CompletedSynchronously)
                {
                    collection[index].EndOpen(result);
                    Decrement(true); 
                }
            } 
        } 

        static void Callback(IAsyncResult result) 
        {
            if (result.CompletedSynchronously)
                return;
            CallbackState callbackState = (CallbackState)result.AsyncState; 
            try
            { 
                callbackState.Instance.EndOpen(result); 
                callbackState.Result.Decrement(false);
            } 
#pragma warning suppress 56500 // covered by FxCOP
            catch (Exception e)
            {
                if (DiagnosticUtility.IsFatal(e)) 
                    throw;
 
                callbackState.Result.Decrement(false, e); 
            }
        } 

        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;
            OpenCollectionAsyncResult result;

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

            public OpenCollectionAsyncResult 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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