Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / wpf / src / Base / MS / Internal / Security / RightsManagement / SafeRightsManagementSessionHandle.cs / 1 / SafeRightsManagementSessionHandle.cs
//------------------------------------------------------------------------------ // //// Copyright (c) Microsoft Corporation. All rights reserved. // // // Description: // SafeRightsManagementSessionHandle class // // History: // 10/12/2005: SarjanaS: 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. // // // Description: // SafeRightsManagementSessionHandle class // // History: // 10/12/2005: SarjanaS: 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.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- UrlAuthorizationModule.cs
- WebPartMenu.cs
- SqlXmlStorage.cs
- ExecutionContext.cs
- DrawingContextWalker.cs
- ConstraintConverter.cs
- ContourSegment.cs
- PrintPageEvent.cs
- Menu.cs
- XPathChildIterator.cs
- DirectionalLight.cs
- EntityConnection.cs
- ResolveNameEventArgs.cs
- ComponentResourceKey.cs
- XamlRtfConverter.cs
- BindUriHelper.cs
- PermissionSetTriple.cs
- CompositeFontParser.cs
- TreeNodeCollection.cs
- VisualStyleInformation.cs
- ObjectTag.cs
- Models.cs
- SystemUdpStatistics.cs
- XamlFilter.cs
- ZipIOZip64EndOfCentralDirectoryBlock.cs
- MemberCollection.cs
- ResourceWriter.cs
- WizardStepBase.cs
- XmlSchemaComplexContentRestriction.cs
- StylusEditingBehavior.cs
- TemplateControlCodeDomTreeGenerator.cs
- BaseInfoTable.cs
- formatter.cs
- Errors.cs
- securitycriticaldata.cs
- StretchValidation.cs
- XsltFunctions.cs
- DetailsViewPagerRow.cs
- NgenServicingAttributes.cs
- DbConnectionOptions.cs
- CodeNamespaceImportCollection.cs
- MetaChildrenColumn.cs
- MetadataArtifactLoaderComposite.cs
- SymbolEqualComparer.cs
- BridgeDataRecord.cs
- counter.cs
- UserControlCodeDomTreeGenerator.cs
- ADMembershipUser.cs
- LongSumAggregationOperator.cs
- MulticastOption.cs
- InvariantComparer.cs
- SafePEFileHandle.cs
- ComponentEditorPage.cs
- DesignerOptionService.cs
- XmlFormatReaderGenerator.cs
- ServicePoint.cs
- PageThemeBuildProvider.cs
- FeatureAttribute.cs
- PtsHelper.cs
- SettingsBase.cs
- SocketException.cs
- UserUseLicenseDictionaryLoader.cs
- UInt16.cs
- ZipFileInfoCollection.cs
- AlphaSortedEnumConverter.cs
- RotateTransform.cs
- ColumnMapTranslator.cs
- CompiledXpathExpr.cs
- ContextBase.cs
- DataList.cs
- BitmapEffectOutputConnector.cs
- RedistVersionInfo.cs
- KnownTypeDataContractResolver.cs
- Mutex.cs
- ReferenceList.cs
- Vector3DCollectionValueSerializer.cs
- InternalConfigSettingsFactory.cs
- WeakReferenceEnumerator.cs
- XmlNode.cs
- Material.cs
- WSHttpTransportSecurityElement.cs
- SystemColorTracker.cs
- SymLanguageType.cs
- EntryPointNotFoundException.cs
- ThreadInterruptedException.cs
- ConstraintStruct.cs
- MemoryResponseElement.cs
- SelectionProviderWrapper.cs
- SoapClientProtocol.cs
- GeometryValueSerializer.cs
- DaylightTime.cs
- PrintDialogException.cs
- InvalidPropValue.cs
- StorageInfo.cs
- DefaultMemberAttribute.cs
- ActivityMarkupSerializationProvider.cs
- FixedPosition.cs
- ContextMarshalException.cs
- SynchronizedPool.cs
- SchemaCollectionPreprocessor.cs