Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / __ComObject.cs / 1305376 / __ComObject.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== /*============================================================ ** ** Class: __ComObject ** ** ** __ComObject is the root class for all COM wrappers. This class ** defines only the basics. This class is used for wrapping COM objects ** accessed from COM+ ** ** ===========================================================*/ namespace System { using System; using System.Collections; using System.Threading; using System.Runtime.InteropServices; using System.Reflection; using System.Security.Permissions; internal class __ComObject : MarshalByRefObject { private Hashtable m_ObjectToDataMap; /*=========================================================== ** default constructor ** can't instantiate this directly =============================================================*/ private __ComObject () { } [System.Security.SecurityCritical] // auto-generated internal IntPtr GetIUnknown(out bool fIsURTAggregated) { fIsURTAggregated = !GetType().IsDefined(typeof(ComImportAttribute), false); return System.Runtime.InteropServices.Marshal.GetIUnknownForObject(this); } //=================================================================== // This method retrieves the data associated with the specified // key if any such data exists for the current __ComObject. //=================================================================== internal Object GetData(Object key) { Object data = null; // Synchronize access to the map. lock(this) { // If the map hasn't been allocated, then there can be no data for the specified key. if (m_ObjectToDataMap != null) { // Look up the data in the map. data = m_ObjectToDataMap[key]; } } return data; } //==================================================================== // This method sets the data for the specified key on the current // __ComObject. //=================================================================== internal bool SetData(Object key, Object data) { bool bAdded = false; // Synchronize access to the map. lock(this) { // If the map hasn't been allocated yet, allocate it. if (m_ObjectToDataMap == null) m_ObjectToDataMap = new Hashtable(); // If there isn't already data in the map then add it. if (m_ObjectToDataMap[key] == null) { m_ObjectToDataMap[key] = data; bAdded = true; } } return bAdded; } //==================================================================== // This method is called from within the EE and releases all the // cached data for the __ComObject. //==================================================================== [System.Security.SecurityCritical] // auto-generated internal void ReleaseAllData() { // Synchronize access to the map. lock(this) { // If the map hasn't been allocated, then there is nothing to do. if (m_ObjectToDataMap != null) { foreach (Object o in m_ObjectToDataMap.Values) { // If the object implements IDisposable, then call Dispose on it. IDisposable DisposableObj = o as IDisposable; if (DisposableObj != null) DisposableObj.Dispose(); // If the object is a derived from __ComObject, then call Marshal.ReleaseComObject on it. __ComObject ComObj = o as __ComObject; if (ComObj != null) Marshal.ReleaseComObject(ComObj); } // Set the map to null to indicate it has been cleaned up. m_ObjectToDataMap = null; } } } //=================================================================== // This method is called from within the EE and is used to handle // calls on methods of event interfaces. //==================================================================== [System.Security.SecurityCritical] // auto-generated internal Object GetEventProvider(RuntimeType t) { // Check to see if we already have a cached event provider for this type. Object EvProvider = GetData(t); // If we don't then we need to create one. if (EvProvider == null) EvProvider = CreateEventProvider(t); return EvProvider; } [System.Security.SecurityCritical] // auto-generated internal int ReleaseSelf() { return Marshal.InternalReleaseComObject(this); } [System.Security.SecurityCritical] // auto-generated internal void FinalReleaseSelf() { Marshal.InternalFinalReleaseComObject(this); } [System.Security.SecurityCritical] // auto-generated [ReflectionPermissionAttribute(SecurityAction.Assert, MemberAccess=true)] private Object CreateEventProvider(RuntimeType t) { // Create the event provider for the specified type. Object EvProvider = Activator.CreateInstance(t, Activator.ConstructorDefault | BindingFlags.NonPublic, null, new Object[]{this}, null); // Attempt to cache the wrapper on the object. if (!SetData(t, EvProvider)) { // Dispose the event provider if it implements IDisposable. IDisposable DisposableEvProv = EvProvider as IDisposable; if (DisposableEvProv != null) DisposableEvProv.Dispose(); // Another thead already cached the wrapper so use that one instead. EvProvider = GetData(t); } return EvProvider; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== /*============================================================ ** ** Class: __ComObject ** ** ** __ComObject is the root class for all COM wrappers. This class ** defines only the basics. This class is used for wrapping COM objects ** accessed from COM+ ** ** ===========================================================*/ namespace System { using System; using System.Collections; using System.Threading; using System.Runtime.InteropServices; using System.Reflection; using System.Security.Permissions; internal class __ComObject : MarshalByRefObject { private Hashtable m_ObjectToDataMap; /*=========================================================== ** default constructor ** can't instantiate this directly =============================================================*/ private __ComObject () { } [System.Security.SecurityCritical] // auto-generated internal IntPtr GetIUnknown(out bool fIsURTAggregated) { fIsURTAggregated = !GetType().IsDefined(typeof(ComImportAttribute), false); return System.Runtime.InteropServices.Marshal.GetIUnknownForObject(this); } //=================================================================== // This method retrieves the data associated with the specified // key if any such data exists for the current __ComObject. //=================================================================== internal Object GetData(Object key) { Object data = null; // Synchronize access to the map. lock(this) { // If the map hasn't been allocated, then there can be no data for the specified key. if (m_ObjectToDataMap != null) { // Look up the data in the map. data = m_ObjectToDataMap[key]; } } return data; } //==================================================================== // This method sets the data for the specified key on the current // __ComObject. //=================================================================== internal bool SetData(Object key, Object data) { bool bAdded = false; // Synchronize access to the map. lock(this) { // If the map hasn't been allocated yet, allocate it. if (m_ObjectToDataMap == null) m_ObjectToDataMap = new Hashtable(); // If there isn't already data in the map then add it. if (m_ObjectToDataMap[key] == null) { m_ObjectToDataMap[key] = data; bAdded = true; } } return bAdded; } //==================================================================== // This method is called from within the EE and releases all the // cached data for the __ComObject. //==================================================================== [System.Security.SecurityCritical] // auto-generated internal void ReleaseAllData() { // Synchronize access to the map. lock(this) { // If the map hasn't been allocated, then there is nothing to do. if (m_ObjectToDataMap != null) { foreach (Object o in m_ObjectToDataMap.Values) { // If the object implements IDisposable, then call Dispose on it. IDisposable DisposableObj = o as IDisposable; if (DisposableObj != null) DisposableObj.Dispose(); // If the object is a derived from __ComObject, then call Marshal.ReleaseComObject on it. __ComObject ComObj = o as __ComObject; if (ComObj != null) Marshal.ReleaseComObject(ComObj); } // Set the map to null to indicate it has been cleaned up. m_ObjectToDataMap = null; } } } //=================================================================== // This method is called from within the EE and is used to handle // calls on methods of event interfaces. //==================================================================== [System.Security.SecurityCritical] // auto-generated internal Object GetEventProvider(RuntimeType t) { // Check to see if we already have a cached event provider for this type. Object EvProvider = GetData(t); // If we don't then we need to create one. if (EvProvider == null) EvProvider = CreateEventProvider(t); return EvProvider; } [System.Security.SecurityCritical] // auto-generated internal int ReleaseSelf() { return Marshal.InternalReleaseComObject(this); } [System.Security.SecurityCritical] // auto-generated internal void FinalReleaseSelf() { Marshal.InternalFinalReleaseComObject(this); } [System.Security.SecurityCritical] // auto-generated [ReflectionPermissionAttribute(SecurityAction.Assert, MemberAccess=true)] private Object CreateEventProvider(RuntimeType t) { // Create the event provider for the specified type. Object EvProvider = Activator.CreateInstance(t, Activator.ConstructorDefault | BindingFlags.NonPublic, null, new Object[]{this}, null); // Attempt to cache the wrapper on the object. if (!SetData(t, EvProvider)) { // Dispose the event provider if it implements IDisposable. IDisposable DisposableEvProv = EvProvider as IDisposable; if (DisposableEvProv != null) DisposableEvProv.Dispose(); // Another thead already cached the wrapper so use that one instead. EvProvider = GetData(t); } return EvProvider; } } } // 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
- CalendarTable.cs
- GuidelineCollection.cs
- ZipIOLocalFileDataDescriptor.cs
- WindowsGraphicsCacheManager.cs
- Vector3DValueSerializer.cs
- MembershipValidatePasswordEventArgs.cs
- HyperLink.cs
- XsdValidatingReader.cs
- ProfileSection.cs
- Vector.cs
- TemplateParser.cs
- WebPartDeleteVerb.cs
- SHA1Cng.cs
- LambdaCompiler.cs
- SessionViewState.cs
- FloatUtil.cs
- CodePageEncoding.cs
- OrderByLifter.cs
- AnnotationMap.cs
- SecureStringHasher.cs
- SiteMap.cs
- NullRuntimeConfig.cs
- GridEntryCollection.cs
- AppearanceEditorPart.cs
- ParseElementCollection.cs
- WebErrorHandler.cs
- TemplateControlParser.cs
- KeyConverter.cs
- WorkflowOwnershipException.cs
- Rect3D.cs
- DrawingVisual.cs
- ResourceSet.cs
- PathStreamGeometryContext.cs
- HtmlForm.cs
- ByteArrayHelperWithString.cs
- BrowserInteropHelper.cs
- CodeTypeReferenceExpression.cs
- EndEvent.cs
- TypeHelpers.cs
- MessageDroppedTraceRecord.cs
- DataContractSet.cs
- WebServiceTypeData.cs
- PackageDigitalSignature.cs
- CommonGetThemePartSize.cs
- StaticTextPointer.cs
- Context.cs
- SoapCommonClasses.cs
- SafeNativeMethodsCLR.cs
- NotificationContext.cs
- MemberInfoSerializationHolder.cs
- BaseDataListDesigner.cs
- OracleEncoding.cs
- TextUtf8RawTextWriter.cs
- SwitchLevelAttribute.cs
- AgileSafeNativeMemoryHandle.cs
- XPathItem.cs
- StickyNote.cs
- SQLSingle.cs
- NoPersistProperty.cs
- BinHexEncoder.cs
- DataGridDefaultColumnWidthTypeConverter.cs
- StackBuilderSink.cs
- ToggleButtonAutomationPeer.cs
- SplitterDesigner.cs
- XmlSchemaType.cs
- ItemCollection.cs
- WebSysDefaultValueAttribute.cs
- ModelItem.cs
- LambdaCompiler.Address.cs
- OrCondition.cs
- TextShapeableCharacters.cs
- DateTimePicker.cs
- ZipIOModeEnforcingStream.cs
- WebPartVerbsEventArgs.cs
- EntityCommandDefinition.cs
- StyleBamlTreeBuilder.cs
- ItemChangedEventArgs.cs
- TemplateColumn.cs
- TextFindEngine.cs
- DataServiceOperationContext.cs
- TableChangeProcessor.cs
- Pts.cs
- XmlSchemaObject.cs
- GlyphsSerializer.cs
- DataGridViewRowHeightInfoNeededEventArgs.cs
- FixedTextPointer.cs
- UserThread.cs
- Set.cs
- DataGridViewColumnConverter.cs
- CompositeScriptReferenceEventArgs.cs
- MemberMaps.cs
- Random.cs
- AutomationInteropProvider.cs
- BitmapEffectDrawingContextState.cs
- TextShapeableCharacters.cs
- TimelineGroup.cs
- SqlDataRecord.cs
- NamespaceQuery.cs
- TextEditorLists.cs
- ResourceDescriptionAttribute.cs