Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / clr / src / BCL / System / __ComObject.cs / 1 / __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 () { } 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. //==================================================================== 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. //==================================================================== internal Object GetEventProvider(Type 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; } internal int ReleaseSelf() { return Marshal.InternalReleaseComObject(this); } internal void FinalReleaseSelf() { Marshal.InternalFinalReleaseComObject(this); } [ReflectionPermissionAttribute(SecurityAction.Assert, MemberAccess=true)] private Object CreateEventProvider(Type 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 () { } 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. //==================================================================== 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. //==================================================================== internal Object GetEventProvider(Type 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; } internal int ReleaseSelf() { return Marshal.InternalReleaseComObject(this); } internal void FinalReleaseSelf() { Marshal.InternalFinalReleaseComObject(this); } [ReflectionPermissionAttribute(SecurityAction.Assert, MemberAccess=true)] private Object CreateEventProvider(Type 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
- SynchronousSendBindingElement.cs
- InteropAutomationProvider.cs
- TextBox.cs
- GenericTextProperties.cs
- BevelBitmapEffect.cs
- SingleAnimation.cs
- BamlWriter.cs
- RequestBringIntoViewEventArgs.cs
- NativeMethods.cs
- Int32KeyFrameCollection.cs
- MailAddressCollection.cs
- MemberDomainMap.cs
- ValidationErrorEventArgs.cs
- SoapProtocolImporter.cs
- RegexWriter.cs
- TypeForwardedToAttribute.cs
- MouseButton.cs
- ProjectionPathBuilder.cs
- ManagementOptions.cs
- ReadOnlyObservableCollection.cs
- ThreadAttributes.cs
- DBCSCodePageEncoding.cs
- XmlSchemas.cs
- CmsInterop.cs
- ActivityDesignerHighlighter.cs
- ControlParameter.cs
- DBParameter.cs
- StateMachineSubscriptionManager.cs
- RoutedEventValueSerializer.cs
- SequenceDesigner.cs
- LinkArea.cs
- ProfileGroupSettingsCollection.cs
- ToolboxItemAttribute.cs
- TextRenderingModeValidation.cs
- ChineseLunisolarCalendar.cs
- Vector.cs
- EasingKeyFrames.cs
- XsltContext.cs
- BasePattern.cs
- GridView.cs
- Set.cs
- TypefaceMap.cs
- ButtonField.cs
- GridItemCollection.cs
- TextCompositionEventArgs.cs
- PeerName.cs
- CodePrimitiveExpression.cs
- RequestQueue.cs
- HwndMouseInputProvider.cs
- WebReferencesBuildProvider.cs
- ObjectKeyFrameCollection.cs
- FileVersionInfo.cs
- WorkflowDesignerMessageFilter.cs
- dataobject.cs
- CachingParameterInspector.cs
- DataGrid.cs
- Socket.cs
- PreDigestedSignedInfo.cs
- cookiecollection.cs
- DataGridViewHeaderCell.cs
- PersonalizationProviderCollection.cs
- TagMapCollection.cs
- DynamicDiscoveryDocument.cs
- SqlInternalConnectionSmi.cs
- InProcStateClientManager.cs
- XmlSchemaParticle.cs
- ClientSideQueueItem.cs
- ContentElement.cs
- RecordConverter.cs
- EventDescriptor.cs
- HttpModuleCollection.cs
- DataContractSet.cs
- FontWeights.cs
- SafePointer.cs
- ScrollChangedEventArgs.cs
- StrokeNodeOperations.cs
- RegistryDataKey.cs
- DateTimeSerializationSection.cs
- ActivityStateRecord.cs
- mda.cs
- ScalarType.cs
- WindowsStartMenu.cs
- CodeAttributeArgument.cs
- RelatedView.cs
- AsymmetricAlgorithm.cs
- XmlSerializableServices.cs
- SHA512.cs
- ToolStripOverflow.cs
- MenuItemCollection.cs
- DataRecord.cs
- ContextMenuAutomationPeer.cs
- TableStyle.cs
- TextRangeProviderWrapper.cs
- FontEmbeddingManager.cs
- EdmItemCollection.OcAssemblyCache.cs
- DrawToolTipEventArgs.cs
- Helper.cs
- WorkflowInstanceSuspendedRecord.cs
- BuildManagerHost.cs
- DPTypeDescriptorContext.cs