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
- ThicknessConverter.cs
- EmptyControlCollection.cs
- ProfileInfo.cs
- OperationResponse.cs
- UpdateExpressionVisitor.cs
- ChildTable.cs
- OracleConnectionFactory.cs
- DataGridViewLayoutData.cs
- ListMarkerSourceInfo.cs
- Button.cs
- QilTypeChecker.cs
- Component.cs
- wmiprovider.cs
- Application.cs
- SiteMapNodeCollection.cs
- HatchBrush.cs
- EntityViewContainer.cs
- _FtpControlStream.cs
- DesignSurfaceServiceContainer.cs
- RemoteWebConfigurationHostServer.cs
- RepeatButtonAutomationPeer.cs
- ToolStripItemTextRenderEventArgs.cs
- BasicCellRelation.cs
- PropertyRef.cs
- MatrixTransform3D.cs
- ProfessionalColorTable.cs
- Attributes.cs
- TrackingMemoryStream.cs
- SignedXml.cs
- Globals.cs
- DataKeyCollection.cs
- NumericUpDownAccelerationCollection.cs
- COAUTHIDENTITY.cs
- PieceDirectory.cs
- FileVersion.cs
- TrackBarRenderer.cs
- ListViewUpdateEventArgs.cs
- RoutedEvent.cs
- SoapExtensionReflector.cs
- ImportContext.cs
- Component.cs
- StorageMappingItemCollection.cs
- ExtensionQuery.cs
- FormViewInsertEventArgs.cs
- ClientTargetSection.cs
- ButtonPopupAdapter.cs
- TypeTypeConverter.cs
- NullableFloatMinMaxAggregationOperator.cs
- ExpressionBuilderContext.cs
- DelayDesigner.cs
- X500Name.cs
- StateItem.cs
- EffectiveValueEntry.cs
- StringStorage.cs
- BooleanProjectedSlot.cs
- LogExtentCollection.cs
- EventManager.cs
- SchemaImporter.cs
- Separator.cs
- Wow64ConfigurationLoader.cs
- hresults.cs
- FixedSOMPageElement.cs
- EmbossBitmapEffect.cs
- ScriptManager.cs
- DateTimeUtil.cs
- DataMemberAttribute.cs
- TableLayoutSettings.cs
- Int64.cs
- DataGridViewTopLeftHeaderCell.cs
- SqlNodeAnnotations.cs
- XmlSchemaSimpleContent.cs
- DataKeyArray.cs
- NavigationEventArgs.cs
- FontSourceCollection.cs
- DynamicValueConverter.cs
- Variable.cs
- BitmapEffectDrawingContent.cs
- RadioButtonList.cs
- GeneralTransform2DTo3DTo2D.cs
- ACL.cs
- ToolStripButton.cs
- BypassElement.cs
- BitmapSizeOptions.cs
- WinEventTracker.cs
- DetailsViewRow.cs
- StorageSetMapping.cs
- InternalConfigHost.cs
- MutexSecurity.cs
- WebBaseEventKeyComparer.cs
- ParameterCollection.cs
- SqlDataSourceRefreshSchemaForm.cs
- AnnotationComponentManager.cs
- NCryptSafeHandles.cs
- DataViewManagerListItemTypeDescriptor.cs
- CornerRadius.cs
- GlobalItem.cs
- BaseCollection.cs
- DataBoundControlAdapter.cs
- LoginView.cs
- DocumentXPathNavigator.cs