Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Base / MS / Internal / Security / RightsManagement / SafeRightsManagementSessionHandle.cs / 1 / SafeRightsManagementSessionHandle.cs
//------------------------------------------------------------------------------ // //// Copyright (c) Microsoft Corporation. All rights reserved. // // // Description: // SafeRightsManagementSessionHandle class // // History: // 10/12/2005: [....]: Initial implementation. // //----------------------------------------------------------------------------- using System; using System.Runtime.InteropServices; using Microsoft.Win32.SafeHandles; using System.Security; namespace MS.Internal.Security.RightsManagement { [SecurityCritical(SecurityCriticalScope.Everything)] internal sealed class SafeRightsManagementSessionHandle : SafeHandle { //Although it is not obvious this constructor is being called by the interop services // it throws exceptions without it private SafeRightsManagementSessionHandle() : base(IntPtr.Zero, true) { } // We have incompatibility between SafeHandle class hierarchy and the unmanaged // DRM SDK declarations. In the safe handle hierarchy it is assumed that the type // of handle is the IntPtr (64 or 32 bit depending on the platform). In the unmanaged // SDK C++ unsigned long type is used, which is 32 bit regardless of the platform. // We have decided the safest thing would be to still use the SafeHandle classes // and subclasses and cast variable back and force under assumption that IntPtr // is at least as big as unsigned long (in the managed code we generally use uint // declaration for that) internal SafeRightsManagementSessionHandle(uint handle) : base((IntPtr)handle, true) // "true" means "owns the handle" { } // base class expects us to override this method with the handle specific release code protected override bool ReleaseHandle() { int z = 0; if (!IsInvalid) { // we can not use safe handle in the DrmClose... function // as the SafeHandle implementation marks this instance as an invalid by the time // ReleaseHandle is called. After that marshalling code doesn't let the current instance // of the Safe*Handle sub-class to cross managed/unmanaged boundary. z = SafeNativeMethods.DRMCloseSession((uint)this.handle); #if DEBUG Errors.ThrowOnErrorCode(z); #endif // This member might be called twice(depending on the client app). In order to // prevent Unmanaged RM SDK from returning an error (Handle is already closed) // we need to mark our handle as invalid after successful close call base.SetHandle(IntPtr.Zero); } return (z>=0); } // apparently there is no existing implementation that treats Zero and only Zero as an invalid value // so we are sub-classing the base class and we need to override the IsInvalid property along with // ReleaseHandle implementation public override bool IsInvalid { get { return this.handle.Equals(IntPtr.Zero); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- ActivityUtilities.cs
- RtfToXamlReader.cs
- TextEncodedRawTextWriter.cs
- MimeReturn.cs
- Reference.cs
- ToolStripItemCollection.cs
- ParentUndoUnit.cs
- ReferentialConstraint.cs
- pingexception.cs
- DbProviderConfigurationHandler.cs
- UnknownBitmapDecoder.cs
- AuthenticateEventArgs.cs
- DataColumnPropertyDescriptor.cs
- DataRowComparer.cs
- ReflectEventDescriptor.cs
- CodeIdentifier.cs
- SessionPageStateSection.cs
- ActiveXContainer.cs
- XmlWriter.cs
- InkPresenter.cs
- TdsParserSafeHandles.cs
- ChannelSinkStacks.cs
- TextRangeAdaptor.cs
- WmlTextViewAdapter.cs
- TextDecorationCollection.cs
- XmlJsonReader.cs
- BidPrivateBase.cs
- TypeViewSchema.cs
- HttpHandlerAction.cs
- Axis.cs
- TitleStyle.cs
- keycontainerpermission.cs
- MetadataItemEmitter.cs
- BaseCodePageEncoding.cs
- BoolExpressionVisitors.cs
- ResourceManager.cs
- OutOfProcStateClientManager.cs
- RegionIterator.cs
- PageBreakRecord.cs
- SchemaNotation.cs
- WMIGenerator.cs
- BinaryFormatterWriter.cs
- ObjectView.cs
- HttpHeaderCollection.cs
- BaseProcessor.cs
- DataControlFieldCollection.cs
- XsdBuilder.cs
- ServiceModelTimeSpanValidator.cs
- HotSpotCollection.cs
- SpoolingTask.cs
- DoubleAnimationBase.cs
- versioninfo.cs
- OleDbErrorCollection.cs
- TraceSource.cs
- SoapMessage.cs
- BitmapFrameEncode.cs
- TextRunProperties.cs
- LayoutTableCell.cs
- DefaultBindingPropertyAttribute.cs
- QuerySafeNavigator.cs
- SecurityTokenRequirement.cs
- CodeCommentStatementCollection.cs
- HttpModuleAction.cs
- MobileUITypeEditor.cs
- MimeMapping.cs
- COM2ColorConverter.cs
- ScriptMethodAttribute.cs
- EventLogLink.cs
- ObfuscationAttribute.cs
- FormsAuthenticationModule.cs
- HttpApplication.cs
- Substitution.cs
- XmlDataSourceNodeDescriptor.cs
- CalendarDesigner.cs
- Point4D.cs
- HttpResponseHeader.cs
- ByteStreamMessageEncoder.cs
- WindowsMenu.cs
- LassoHelper.cs
- MimeTypeAttribute.cs
- XmlParserContext.cs
- ImageInfo.cs
- HttpPostedFile.cs
- TreeNodeSelectionProcessor.cs
- UpdateCommandGenerator.cs
- WebPartCatalogCloseVerb.cs
- ProcessHostMapPath.cs
- ModifierKeysConverter.cs
- EdmSchemaAttribute.cs
- IgnoreFlushAndCloseStream.cs
- WorkerProcess.cs
- DefaultSettingsSection.cs
- RepeaterDataBoundAdapter.cs
- UserUseLicenseDictionaryLoader.cs
- TreeViewTemplateSelector.cs
- CapabilitiesRule.cs
- cookiecontainer.cs
- ScrollItemProviderWrapper.cs
- Variant.cs
- CmsInterop.cs