Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx40 / System.ServiceModel.Discovery / System / ServiceModel / Discovery / AsyncOperationLifetimeManager.cs / 1305376 / AsyncOperationLifetimeManager.cs
//---------------------------------------------------------------- // Copyright (c) Microsoft Corporation. All rights reserved. //--------------------------------------------------------------- namespace System.ServiceModel.Discovery { using System; using System.Collections.Generic; using System.Runtime; using System.Threading; using System.Xml; using SR2 = System.ServiceModel.Discovery.SR; class AsyncOperationLifetimeManager { [Fx.Tag.SynchronizationObject()] object thisLock; bool isAborted; AsyncWaitHandle closeHandle; DictionaryactiveOperations; public AsyncOperationLifetimeManager() { this.thisLock = new object(); this.activeOperations = new Dictionary (); } public bool IsAborted { get { return this.isAborted; } } public bool IsClosed { get { return this.closeHandle != null; } } public bool TryAdd(AsyncOperationContext context) { Fx.Assert(context != null, "The context must be non null."); lock (this.thisLock) { if (this.IsAborted || this.IsClosed) { return false; } if (this.activeOperations.ContainsKey(context.OperationId)) { return false; } this.activeOperations.Add(context.OperationId, context); } return true; } public AsyncOperationContext[] Abort() { AsyncOperationContext[] retValue = null; bool setCloseHandle = false; lock (this.thisLock) { if (this.IsAborted) { return new AsyncOperationContext[] {}; } else { this.isAborted = true; } retValue = new AsyncOperationContext[this.activeOperations.Count]; this.activeOperations.Values.CopyTo(retValue, 0); this.activeOperations.Clear(); setCloseHandle = this.closeHandle != null; } if (setCloseHandle) { this.closeHandle.Set(); } return retValue; } public bool TryLookup(UniqueId operationId, out AsyncOperationContext context) { bool success; lock (this.thisLock) { success = this.activeOperations.TryGetValue(operationId, out context); } return success; } public bool TryLookup (UniqueId operationId, out T context) where T : AsyncOperationContext { AsyncOperationContext asyncContext = null; if (TryLookup(operationId, out asyncContext)) { context = asyncContext as T; if (context != null) { return true; } } context = null; return false; } public T Remove (UniqueId operationId) where T : AsyncOperationContext { AsyncOperationContext context = null; bool setCloseHandle = false; lock (this.thisLock) { if ((this.activeOperations.TryGetValue(operationId, out context)) && (context is T)) { this.activeOperations.Remove(operationId); setCloseHandle = (this.closeHandle != null) && (this.activeOperations.Count == 0); } else { context = null; } } if (setCloseHandle) { this.closeHandle.Set(); } return context as T; } public bool TryRemoveUnique(object userState, out AsyncOperationContext context) { bool success = false; bool setCloseHandle = false; context = null; lock (this.thisLock) { foreach (AsyncOperationContext value in this.activeOperations.Values) { if (object.Equals(value.UserState, userState)) { if (success) { success = false; break; } else { context = value; success = true; } } } if (success) { this.activeOperations.Remove(context.OperationId); setCloseHandle = (this.closeHandle != null) && (this.activeOperations.Count == 0); } } if (setCloseHandle) { this.closeHandle.Set(); } return success; } public void Close(TimeSpan timeout) { InitializeCloseHandle(); if (!this.closeHandle.Wait(timeout)) { throw FxTrace.Exception.AsError(new TimeoutException(SR2.TimeoutOnOperation(timeout))); } } public IAsyncResult BeginClose(TimeSpan timeout, AsyncCallback callback, object state) { InitializeCloseHandle(); return new CloseAsyncResult(this.closeHandle, timeout, callback, state); } public void EndClose(IAsyncResult result) { CloseAsyncResult.End(result); } void InitializeCloseHandle() { bool setCloseHandle = false; lock (this.thisLock) { this.closeHandle = new AsyncWaitHandle(EventResetMode.ManualReset); setCloseHandle = (this.activeOperations.Count == 0); if (this.IsAborted) { setCloseHandle = true; } } if (setCloseHandle) { this.closeHandle.Set(); } } class CloseAsyncResult : AsyncResult { static Action
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