Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / SharedStatics.cs / 1305376 / SharedStatics.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== /*============================================================================== ** ** Class: SharedStatics ** ** ** Purpose: Container for statics that are shared across AppDomains. ** ** =============================================================================*/ namespace System { using System.Threading; using System.Runtime.Remoting; using System.Security; using System.Security.Util; using System.Runtime.CompilerServices; using System.Runtime.ConstrainedExecution; using System.Diagnostics.Contracts; #if FEATURE_CAS_POLICY using StringMaker = System.Security.Util.Tokenizer.StringMaker; #endif // FEATURE_CAS_POLICY internal sealed class SharedStatics { // this is declared static but is actually forced to be the same object // for each AppDomain at AppDomain create time. internal static SharedStatics _sharedStatics; // when we create the single object we can construct anything we will need // here. If not too many, then just create them all in the constructor, otherwise // can have the property check & create. Need to be aware of threading issues // when do so though. // Note: This ctor is not called when we setup _sharedStatics via AppDomain::SetupSharedStatics SharedStatics() { _Remoting_Identity_IDGuid = null; _Remoting_Identity_IDSeqNum = 0x40; // Reserve initial numbers for well known objects. #if FEATURE_CAS_POLICY _maker = null; #endif // FEATURE_CAS_POLICY } private String _Remoting_Identity_IDGuid; public static String Remoting_Identity_IDGuid { [System.Security.SecuritySafeCritical] // auto-generated get { if (_sharedStatics._Remoting_Identity_IDGuid == null) { bool tookLock = false; RuntimeHelpers.PrepareConstrainedRegions(); try { Monitor.Enter(_sharedStatics, ref tookLock); if (_sharedStatics._Remoting_Identity_IDGuid == null) { _sharedStatics._Remoting_Identity_IDGuid = Guid.NewGuid().ToString().Replace('-', '_'); } } finally { if (tookLock) Monitor.Exit(_sharedStatics); } } Contract.Assert(_sharedStatics._Remoting_Identity_IDGuid != null, "_sharedStatics._Remoting_Identity_IDGuid != null"); return _sharedStatics._Remoting_Identity_IDGuid; } } #if FEATURE_CAS_POLICY private StringMaker _maker; [System.Security.SecuritySafeCritical] // auto-generated static public StringMaker GetSharedStringMaker() { StringMaker maker = null; bool tookLock = false; RuntimeHelpers.PrepareConstrainedRegions(); try { Monitor.Enter(_sharedStatics, ref tookLock); if (_sharedStatics._maker != null) { maker = _sharedStatics._maker; _sharedStatics._maker = null; } } finally { if (tookLock) Monitor.Exit(_sharedStatics); } if (maker == null) { maker = new StringMaker(); } return maker; } [System.Security.SecuritySafeCritical] // auto-generated static public void ReleaseSharedStringMaker(ref StringMaker maker) { // save this stringmaker so someone else can use it bool tookLock = false; RuntimeHelpers.PrepareConstrainedRegions(); try { Monitor.Enter(_sharedStatics, ref tookLock); _sharedStatics._maker = maker; maker = null; } finally { if (tookLock) Monitor.Exit(_sharedStatics); } } #endif // FEATURE_CAS_POLICY // Note this may not need to be process-wide. private int _Remoting_Identity_IDSeqNum; internal static int Remoting_Identity_GetNextSeqNum() { return Interlocked.Increment(ref _sharedStatics._Remoting_Identity_IDSeqNum); } // This is the total amount of memory currently "reserved" via // all MemoryFailPoints allocated within the process. // Stored as a long because we need to use Interlocked.Add. private long _memFailPointReservedMemory; [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] internal static long AddMemoryFailPointReservation(long size) { // Size can legitimately be negative - see Dispose. return Interlocked.Add(ref _sharedStatics._memFailPointReservedMemory, (long) size); } internal static ulong MemoryFailPointReservedMemory { get { Contract.Assert(_sharedStatics._memFailPointReservedMemory >= 0, "Process-wide MemoryFailPoint reserved memory was negative!"); return (ulong) _sharedStatics._memFailPointReservedMemory; } } #if FEATURE_CORECLR // Silverlight2 implementation restriction (all hosts must specify the same PLATFORM_ASSEMBLIES list.) internal static bool ConflictsWithPriorPlatformList(String platformListString) { if (platformListString == null) { platformListString = ""; // null is valid but collides with _platformListString sentinel so convert to semantically equivalent "". } String prior = Interlocked.CompareExchange(ref _sharedStatics._platformListString, platformListString, null); if (prior == null) { return false; } if (prior == platformListString) { return false; } return true; } private String _platformListString; #endif //FEATURE_CORECLR } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- SolidBrush.cs
- BitmapEffect.cs
- NotificationContext.cs
- CodeMemberMethod.cs
- RubberbandSelector.cs
- PrimitiveDataContract.cs
- EntityViewContainer.cs
- JsonDeserializer.cs
- AnimationTimeline.cs
- MultiPageTextView.cs
- TransformerTypeCollection.cs
- ReachDocumentSequenceSerializer.cs
- ArrayList.cs
- ProfessionalColors.cs
- WebBrowserProgressChangedEventHandler.cs
- CommandDesigner.cs
- DescendantBaseQuery.cs
- Processor.cs
- XPathPatternBuilder.cs
- TableLayoutCellPaintEventArgs.cs
- DbMetaDataColumnNames.cs
- GeneralTransform3DTo2DTo3D.cs
- ImageUrlEditor.cs
- AccessDataSource.cs
- WebFormsRootDesigner.cs
- RawStylusInputCustomData.cs
- BuildResult.cs
- WebPartManagerInternals.cs
- AssemblyInfo.cs
- DataGridViewSelectedCellsAccessibleObject.cs
- MenuItemCollectionEditor.cs
- XmlSchemaAll.cs
- Floater.cs
- MetadataProperty.cs
- DataSourceXmlSerializer.cs
- ChtmlTextWriter.cs
- PlaceHolder.cs
- CustomSignedXml.cs
- EntityDataSourceDesignerHelper.cs
- TouchesCapturedWithinProperty.cs
- DefaultTraceListener.cs
- EncoderExceptionFallback.cs
- DefaultMemberAttribute.cs
- WorkItem.cs
- OverflowException.cs
- SafeIUnknown.cs
- WSDualHttpBinding.cs
- SolidColorBrush.cs
- ToolboxComponentsCreatingEventArgs.cs
- Menu.cs
- SyndicationContent.cs
- FontStyleConverter.cs
- UnsafeNativeMethods.cs
- LocatorPartList.cs
- ReadOnlyDictionary.cs
- DataGridViewButtonCell.cs
- AssemblySettingAttributes.cs
- DesignerSerializationOptionsAttribute.cs
- ZipFileInfoCollection.cs
- DirectionalLight.cs
- AssociativeAggregationOperator.cs
- TrackingMemoryStream.cs
- PageTheme.cs
- XmlSchemaParticle.cs
- TextureBrush.cs
- SafeRightsManagementEnvironmentHandle.cs
- DataGridViewEditingControlShowingEventArgs.cs
- WorkflowTransactionService.cs
- DebugView.cs
- ScaleTransform3D.cs
- SystemDiagnosticsSection.cs
- tooltip.cs
- HashAlgorithm.cs
- HandlerWithFactory.cs
- PixelFormatConverter.cs
- WorkflowInstanceProxy.cs
- LiteralTextContainerControlBuilder.cs
- QueryActivatableWorkflowsCommand.cs
- PathStreamGeometryContext.cs
- Grammar.cs
- XmlHelper.cs
- KnownBoxes.cs
- messageonlyhwndwrapper.cs
- IIS7WorkerRequest.cs
- CreateParams.cs
- ToolStripGripRenderEventArgs.cs
- HttpWebRequest.cs
- SqlTypeConverter.cs
- Trigger.cs
- TypeForwardedToAttribute.cs
- OperatingSystem.cs
- DESCryptoServiceProvider.cs
- PathSegment.cs
- FileRecordSequence.cs
- columnmapkeybuilder.cs
- DataGridParentRows.cs
- WebPartVerbsEventArgs.cs
- AssociationType.cs
- ObjectStateEntryDbUpdatableDataRecord.cs
- XpsDocument.cs