Code:
/ WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / ServiceModel / System / ServiceModel / Channels / ChainedAsyncResult.cs / 1 / ChainedAsyncResult.cs
//------------------------------------------------------------ // Copyright (c) Microsoft Corporation. All rights reserved. //----------------------------------------------------------- namespace System.ServiceModel.Channels { using System.Collections.Generic; using System.ServiceModel; internal delegate IAsyncResult ChainedBeginHandler(TimeSpan timeout, AsyncCallback asyncCallback, object state); internal delegate void ChainedEndHandler(IAsyncResult result); class ChainedAsyncResult : AsyncResult { ChainedBeginHandler begin2; ChainedEndHandler end1; ChainedEndHandler end2; TimeoutHelper timeoutHelper; static AsyncCallback begin1Callback = DiagnosticUtility.ThunkAsyncCallback(new AsyncCallback(Begin1Callback)); static AsyncCallback begin2Callback = DiagnosticUtility.ThunkAsyncCallback(new AsyncCallback(Begin2Callback)); protected ChainedAsyncResult(TimeSpan timeout, AsyncCallback callback, object state) : base(callback, state) { this.timeoutHelper = new TimeoutHelper(timeout); } public ChainedAsyncResult(TimeSpan timeout, AsyncCallback callback, object state, ChainedBeginHandler begin1, ChainedEndHandler end1, ChainedBeginHandler begin2, ChainedEndHandler end2) : base(callback, state) { this.timeoutHelper = new TimeoutHelper(timeout); Begin(begin1, end1, begin2, end2); } protected void Begin(ChainedBeginHandler begin1, ChainedEndHandler end1, ChainedBeginHandler begin2, ChainedEndHandler end2) { this.end1 = end1; this.begin2 = begin2; this.end2 = end2; IAsyncResult result = begin1(this.timeoutHelper.RemainingTime(), begin1Callback, this); if (!result.CompletedSynchronously) return; if (Begin1Completed(result)) { this.Complete(true); } } static void Begin1Callback(IAsyncResult result) { if (result.CompletedSynchronously) return; ChainedAsyncResult thisPtr = (ChainedAsyncResult)result.AsyncState; bool completeSelf = false; Exception completeException = null; try { completeSelf = thisPtr.Begin1Completed(result); } #pragma warning suppress 56500 // covered by FxCOP catch (Exception exception) { if (DiagnosticUtility.IsFatal(exception)) { throw; } completeSelf = true; completeException = exception; } if (completeSelf) { thisPtr.Complete(false, completeException); } } bool Begin1Completed(IAsyncResult result) { end1(result); result = begin2(this.timeoutHelper.RemainingTime(), begin2Callback, this); if (!result.CompletedSynchronously) return false; end2(result); return true; } static void Begin2Callback(IAsyncResult result) { if (result.CompletedSynchronously) return; ChainedAsyncResult thisPtr = (ChainedAsyncResult)result.AsyncState; Exception completeException = null; try { thisPtr.end2(result); } #pragma warning suppress 56500 // covered by FxCOP catch (Exception exception) { if (DiagnosticUtility.IsFatal(exception)) { throw; } completeException = exception; } thisPtr.Complete(false, completeException); } public static void End(IAsyncResult result) { AsyncResult.End(result); } } internal class ChainedCloseAsyncResult : ChainedAsyncResult { IList collection; public ChainedCloseAsyncResult(TimeSpan timeout, AsyncCallback callback, object state, ChainedBeginHandler begin1, ChainedEndHandler end1, IList collection) : base(timeout, callback, state) { this.collection = collection; Begin(BeginClose, EndClose, begin1, end1); } public ChainedCloseAsyncResult(TimeSpan timeout, AsyncCallback callback, object state, ChainedBeginHandler begin1, ChainedEndHandler end1, params ICommunicationObject[] objs) : base(timeout, callback, state) { collection = new List (); if (objs!= null) for (int index = 0; index < objs.Length; index++) if (objs[index] != null) collection.Add(objs[index]); Begin(BeginClose, EndClose, begin1, end1); } IAsyncResult BeginClose(TimeSpan timeout, AsyncCallback callback, object state) { return new CloseCollectionAsyncResult(timeout, callback, state, collection); } void EndClose(IAsyncResult result) { CloseCollectionAsyncResult.End((CloseCollectionAsyncResult)result); } } internal class ChainedOpenAsyncResult : ChainedAsyncResult { IList collection; public ChainedOpenAsyncResult(TimeSpan timeout, AsyncCallback callback, object state, ChainedBeginHandler begin1, ChainedEndHandler end1, IList collection) : base(timeout, callback, state) { this.collection = collection; Begin(begin1, end1, BeginOpen, EndOpen); } public ChainedOpenAsyncResult(TimeSpan timeout, AsyncCallback callback, object state, ChainedBeginHandler begin1, ChainedEndHandler end1, params ICommunicationObject[] objs) : base(timeout, callback, state) { collection = new List (); for (int index = 0; index < objs.Length; index++) if (objs[index] != null) collection.Add(objs[index]); Begin(begin1, end1, BeginOpen, EndOpen); } IAsyncResult BeginOpen(TimeSpan timeout, AsyncCallback callback, object state) { return new OpenCollectionAsyncResult(timeout, callback, state, collection); } void EndOpen(IAsyncResult result) { OpenCollectionAsyncResult.End((OpenCollectionAsyncResult)result); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. 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