Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / Util / WorkItem.cs / 1 / WorkItem.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.Util { using System.Runtime.InteropServices; using System.Security.Permissions; using System.Threading; // // Support for positing of work items to a different thread // ////// public delegate void WorkItemCallback(); ///[To be supplied.] ////// [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] public class WorkItem { private static bool _useQueueUserWorkItem = true; private static WaitCallback _onQueueUserWorkItemCompletion = new WaitCallback(OnQueueUserWorkItemCompletion); ///[To be supplied.] ////// [SecurityPermission(SecurityAction.Demand, Unrestricted=true)] public static void Post(WorkItemCallback callback) { #if !FEATURE_PAL // ROTORTODO if (Environment.OSVersion.Platform != PlatformID.Win32NT) throw new PlatformNotSupportedException(SR.GetString(SR.RequiresNT)); #else // !FEATURE_PAL throw new NotImplementedException("ROTORTODO"); #endif // !FEATURE_PAL PostInternal(callback); } // assert to disregard the user code up the compressed stack [PermissionSet(SecurityAction.Assert, Unrestricted=true)] private static void CallCallbackWithAssert(WorkItemCallback callback) { callback(); } private static void OnQueueUserWorkItemCompletion(Object state) { WorkItemCallback callback = state as WorkItemCallback; if (callback != null) { CallCallbackWithAssert(callback); } } internal static void PostInternal(WorkItemCallback callback) { if (_useQueueUserWorkItem) { ThreadPool.QueueUserWorkItem(_onQueueUserWorkItemCompletion, callback); } else { WrappedWorkItemCallback w = new WrappedWorkItemCallback(callback); w.Post(); } } } internal class WrappedWorkItemCallback { private GCHandle _rootedThis; private WorkItemCallback _originalCallback; private WorkItemCallback _wrapperCallback; internal WrappedWorkItemCallback(WorkItemCallback callback) { _originalCallback = callback; _wrapperCallback = new WorkItemCallback(this.OnCallback); } internal void Post() { _rootedThis = GCHandle.Alloc(this); if (UnsafeNativeMethods.PostThreadPoolWorkItem(_wrapperCallback) != 1) { _rootedThis.Free(); throw new HttpException(SR.GetString(SR.Cannot_post_workitem)); } } private void OnCallback() { _rootedThis.Free(); _originalCallback(); } } }[To be supplied.] ///
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- IApplicationTrustManager.cs
- RtfFormatStack.cs
- AdRotator.cs
- RuntimeVariablesExpression.cs
- DynamicDiscoveryDocument.cs
- TranslateTransform3D.cs
- ByteStreamMessageEncoderFactory.cs
- SystemEvents.cs
- WebPartManager.cs
- HwndTarget.cs
- CodeFieldReferenceExpression.cs
- DigitShape.cs
- ImageSourceConverter.cs
- AbstractDataSvcMapFileLoader.cs
- TypeInfo.cs
- CounterSetInstanceCounterDataSet.cs
- DecimalAnimation.cs
- DataTableReaderListener.cs
- SettingsPropertyIsReadOnlyException.cs
- Dictionary.cs
- DictionaryEditChange.cs
- PropertyConverter.cs
- DragCompletedEventArgs.cs
- SignerInfo.cs
- DefaultSerializationProviderAttribute.cs
- UIElement.cs
- FloaterBaseParagraph.cs
- TemplateBindingExpressionConverter.cs
- UpdateManifestForBrowserApplication.cs
- MetadataException.cs
- PanelStyle.cs
- EventLogInternal.cs
- HijriCalendar.cs
- MethodBuilder.cs
- Padding.cs
- BitmapEffectGroup.cs
- ActivityUtilities.cs
- DiscoveryClientDocuments.cs
- DBConnectionString.cs
- FormViewPageEventArgs.cs
- BoundingRectTracker.cs
- SystemColors.cs
- GenericXmlSecurityToken.cs
- MemberPath.cs
- TcpClientCredentialType.cs
- RSAPKCS1KeyExchangeFormatter.cs
- serverconfig.cs
- CharEnumerator.cs
- FileUpload.cs
- GridViewSelectEventArgs.cs
- DelegatingTypeDescriptionProvider.cs
- WsatAdminException.cs
- BigInt.cs
- Partitioner.cs
- XmlSerializationGeneratedCode.cs
- IgnoreSection.cs
- LogSwitch.cs
- GenericXmlSecurityToken.cs
- DeleteStoreRequest.cs
- CodeBinaryOperatorExpression.cs
- PersistenceTypeAttribute.cs
- Timeline.cs
- IDictionary.cs
- PassportIdentity.cs
- ColumnResizeAdorner.cs
- DbConnectionStringCommon.cs
- TextBox.cs
- TemplatedMailWebEventProvider.cs
- MsmqInputMessagePool.cs
- SqlPersonalizationProvider.cs
- GregorianCalendar.cs
- SizeAnimationBase.cs
- Rule.cs
- XmlSchemaDocumentation.cs
- WpfKnownMember.cs
- PageClientProxyGenerator.cs
- TextWriterTraceListener.cs
- HeaderUtility.cs
- Win32Interop.cs
- FileRegion.cs
- HtmlProps.cs
- formatstringdialog.cs
- CaseInsensitiveComparer.cs
- DeferredElementTreeState.cs
- CustomErrorCollection.cs
- DefaultValueAttribute.cs
- Base64WriteStateInfo.cs
- AuthenticationManager.cs
- ViewStateAttachedPropertyFeature.cs
- XomlDesignerLoader.cs
- CompiledRegexRunner.cs
- TextOutput.cs
- SystemIPGlobalStatistics.cs
- XpsDigitalSignature.cs
- ProfessionalColors.cs
- MsmqBindingBase.cs
- ListViewContainer.cs
- DataRowChangeEvent.cs
- ProgressBarRenderer.cs
- CommaDelimitedStringAttributeCollectionConverter.cs