Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / Core / CSharp / System / Windows / Media / FactoryMaker.cs / 1 / FactoryMaker.cs
//------------------------------------------------------------------------------ // Microsoft Avalon // Copyright (c) Microsoft Corporation, 2003 // // File: FactoryMaker.cs // //----------------------------------------------------------------------------- using System; using System.Security; using System.Security.Permissions; using System.Diagnostics; using MS.Internal; using MS.Win32; using System.Windows.Media.Composition; using Microsoft.Internal; using SR=MS.Internal.PresentationCore.SR; using SRID=MS.Internal.PresentationCore.SRID; using UnsafeNativeMethods=MS.Win32.PresentationCore.UnsafeNativeMethods; namespace System.Windows.Media { ////// This is a internal class which is used by non context affinity objects /// to get access to a MIL factory object. /// internal class FactoryMaker: IDisposable { private bool _disposed = false; ////// Critical - Create unmanaged critical resource /// [SecurityCritical] internal FactoryMaker() { lock (s_factoryMakerLock) { // If we haven't have a factory, create one if (s_pFactory == IntPtr.Zero) { // Create the Core MIL factory. // Note: the call below might throw exception. The caller // should catch it. We won't add ref counter here if this // happens. HRESULT.Check(UnsafeNativeMethods.MILFactory2.CreateFactory(out s_pFactory, MS.Internal.Composition.Version.MilSdkVersion)); } s_cInstance++; _fValidObject = true; } } ~FactoryMaker() { Dispose(false); } ////// Dispose of any resources /// public void Dispose() { Dispose(true); } ////// Critical - performs an elevation to call MILUnknown.ReleaseInterface. /// TreatAsSafe - this function elevates to call release ( on an object we own). /// net effect is a shutdown of the FactoryMaker. Considered safe. /// /// Note that for now there is no SUC on ReleaseInterface. We may want to re-consider this. /// [SecurityCritical, SecurityTreatAsSafe] protected virtual void Dispose(bool fDisposing) { if (!_disposed) { if (_fValidObject == true) { lock (s_factoryMakerLock) { s_cInstance--; // Make sure we don't dispose twice _fValidObject = false; // If there is no FactoryMaker object out there, release // factory object if (s_cInstance == 0) { new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Assert(); // BlessedAssert: try { UnsafeNativeMethods.MILUnknown.ReleaseInterface(ref s_pFactory); if (s_pImagingFactory != IntPtr.Zero) { UnsafeNativeMethods.MILUnknown.ReleaseInterface(ref s_pImagingFactory); } } finally { CodeAccessPermission.RevertAssert(); s_pFactory = IntPtr.Zero; s_pImagingFactory = IntPtr.Zero; } } } } // Set the sentinel. _disposed = true; // Suppress finalization of this disposed instance. if (fDisposing) { GC.SuppressFinalize(this); } } } ////// Critical - returns critical resource created under an assert /// internal IntPtr FactoryPtr { [SecurityCritical] get { Debug.Assert(s_pFactory != IntPtr.Zero); return s_pFactory; } } ////// Critical - calls unmanaged code, returns unmanaged pointer /// internal IntPtr ImagingFactoryPtr { [SecurityCritical] get { if (s_pImagingFactory == IntPtr.Zero) { lock (s_factoryMakerLock) { HRESULT.Check(UnsafeNativeMethods.WICCodec.CreateImagingFactory(UnsafeNativeMethods.WICCodec.WINCODEC_SDK_VERSION, out s_pImagingFactory)); } } Debug.Assert(s_pImagingFactory != IntPtr.Zero); return s_pImagingFactory; } } ////// Critical - this is a pointer to an unmanaged object that methods are called directly on /// [SecurityCritical] private static IntPtr s_pFactory; ////// Critical - this is a pointer to an unmanaged object that methods are called directly on /// [SecurityCritical] private static IntPtr s_pImagingFactory; ////// Keeps track of how many instance of current object have been passed out /// private static int s_cInstance = 0; ////// "FactoryMaker" is free threaded. This lock is used to synchronize /// access to the FactoryMaker. /// private static object s_factoryMakerLock = new object(); private bool _fValidObject; } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //------------------------------------------------------------------------------ // Microsoft Avalon // Copyright (c) Microsoft Corporation, 2003 // // File: FactoryMaker.cs // //----------------------------------------------------------------------------- using System; using System.Security; using System.Security.Permissions; using System.Diagnostics; using MS.Internal; using MS.Win32; using System.Windows.Media.Composition; using Microsoft.Internal; using SR=MS.Internal.PresentationCore.SR; using SRID=MS.Internal.PresentationCore.SRID; using UnsafeNativeMethods=MS.Win32.PresentationCore.UnsafeNativeMethods; namespace System.Windows.Media { ////// This is a internal class which is used by non context affinity objects /// to get access to a MIL factory object. /// internal class FactoryMaker: IDisposable { private bool _disposed = false; ////// Critical - Create unmanaged critical resource /// [SecurityCritical] internal FactoryMaker() { lock (s_factoryMakerLock) { // If we haven't have a factory, create one if (s_pFactory == IntPtr.Zero) { // Create the Core MIL factory. // Note: the call below might throw exception. The caller // should catch it. We won't add ref counter here if this // happens. HRESULT.Check(UnsafeNativeMethods.MILFactory2.CreateFactory(out s_pFactory, MS.Internal.Composition.Version.MilSdkVersion)); } s_cInstance++; _fValidObject = true; } } ~FactoryMaker() { Dispose(false); } ////// Dispose of any resources /// public void Dispose() { Dispose(true); } ////// Critical - performs an elevation to call MILUnknown.ReleaseInterface. /// TreatAsSafe - this function elevates to call release ( on an object we own). /// net effect is a shutdown of the FactoryMaker. Considered safe. /// /// Note that for now there is no SUC on ReleaseInterface. We may want to re-consider this. /// [SecurityCritical, SecurityTreatAsSafe] protected virtual void Dispose(bool fDisposing) { if (!_disposed) { if (_fValidObject == true) { lock (s_factoryMakerLock) { s_cInstance--; // Make sure we don't dispose twice _fValidObject = false; // If there is no FactoryMaker object out there, release // factory object if (s_cInstance == 0) { new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Assert(); // BlessedAssert: try { UnsafeNativeMethods.MILUnknown.ReleaseInterface(ref s_pFactory); if (s_pImagingFactory != IntPtr.Zero) { UnsafeNativeMethods.MILUnknown.ReleaseInterface(ref s_pImagingFactory); } } finally { CodeAccessPermission.RevertAssert(); s_pFactory = IntPtr.Zero; s_pImagingFactory = IntPtr.Zero; } } } } // Set the sentinel. _disposed = true; // Suppress finalization of this disposed instance. if (fDisposing) { GC.SuppressFinalize(this); } } } ////// Critical - returns critical resource created under an assert /// internal IntPtr FactoryPtr { [SecurityCritical] get { Debug.Assert(s_pFactory != IntPtr.Zero); return s_pFactory; } } ////// Critical - calls unmanaged code, returns unmanaged pointer /// internal IntPtr ImagingFactoryPtr { [SecurityCritical] get { if (s_pImagingFactory == IntPtr.Zero) { lock (s_factoryMakerLock) { HRESULT.Check(UnsafeNativeMethods.WICCodec.CreateImagingFactory(UnsafeNativeMethods.WICCodec.WINCODEC_SDK_VERSION, out s_pImagingFactory)); } } Debug.Assert(s_pImagingFactory != IntPtr.Zero); return s_pImagingFactory; } } ////// Critical - this is a pointer to an unmanaged object that methods are called directly on /// [SecurityCritical] private static IntPtr s_pFactory; ////// Critical - this is a pointer to an unmanaged object that methods are called directly on /// [SecurityCritical] private static IntPtr s_pImagingFactory; ////// Keeps track of how many instance of current object have been passed out /// private static int s_cInstance = 0; ////// "FactoryMaker" is free threaded. This lock is used to synchronize /// access to the FactoryMaker. /// private static object s_factoryMakerLock = new object(); private bool _fValidObject; } } // 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
- ProtocolsSection.cs
- ObjectMemberMapping.cs
- RequiredAttributeAttribute.cs
- CodeConstructor.cs
- DelegateTypeInfo.cs
- AutomationIdentifierGuids.cs
- SqlGenerator.cs
- DataGridAutoFormatDialog.cs
- InfoCardArgumentException.cs
- BitmapData.cs
- DataGridState.cs
- PassportIdentity.cs
- X509CertificateStore.cs
- FormViewPagerRow.cs
- XmlSchemaAnnotated.cs
- WebConfigurationHost.cs
- AllMembershipCondition.cs
- HiddenFieldPageStatePersister.cs
- BaseTreeIterator.cs
- DbProviderServices.cs
- Number.cs
- DataGridViewControlCollection.cs
- DataDocumentXPathNavigator.cs
- SoapBinding.cs
- BaseResourcesBuildProvider.cs
- VisualStateManager.cs
- DictionaryKeyPropertyAttribute.cs
- TraceEventCache.cs
- SessionStateItemCollection.cs
- ServiceInfo.cs
- PeerCredential.cs
- XmlSchemaSimpleContentRestriction.cs
- PackageRelationshipCollection.cs
- DeviceSpecificChoice.cs
- XPathQilFactory.cs
- ListViewAutomationPeer.cs
- SqlNotificationEventArgs.cs
- SuppressMergeCheckAttribute.cs
- WebRequest.cs
- PointUtil.cs
- ImageConverter.cs
- RequestStatusBarUpdateEventArgs.cs
- Geometry.cs
- CodeDomConfigurationHandler.cs
- InputLangChangeRequestEvent.cs
- GridViewAutomationPeer.cs
- WebPartZoneBase.cs
- ColorDialog.cs
- DataGridViewRowPostPaintEventArgs.cs
- StatusBarPanel.cs
- ManagedFilter.cs
- Visual3D.cs
- IdentityReference.cs
- ModifiableIteratorCollection.cs
- SessionSymmetricTransportSecurityProtocolFactory.cs
- ScrollEvent.cs
- ObjectQueryExecutionPlan.cs
- CompleteWizardStep.cs
- CompiledXpathExpr.cs
- RootBrowserWindow.cs
- Error.cs
- Activator.cs
- SqlNotificationRequest.cs
- RuleInfoComparer.cs
- LocatorGroup.cs
- Win32PrintDialog.cs
- PointIndependentAnimationStorage.cs
- EditorZone.cs
- XmlEnumAttribute.cs
- SelectingProviderEventArgs.cs
- ContextStaticAttribute.cs
- ViewValidator.cs
- EntityException.cs
- BoundPropertyEntry.cs
- HasCopySemanticsAttribute.cs
- IncrementalCompileAnalyzer.cs
- MetafileHeader.cs
- SimpleExpression.cs
- SafeFileMappingHandle.cs
- CanonicalFontFamilyReference.cs
- RoutedPropertyChangedEventArgs.cs
- TreeChangeInfo.cs
- SqlFlattener.cs
- SystemIPv6InterfaceProperties.cs
- DataBindingCollection.cs
- PopupRoot.cs
- TableCellAutomationPeer.cs
- ControlPropertyNameConverter.cs
- DoubleSumAggregationOperator.cs
- ExpressionVisitor.cs
- HorizontalAlignConverter.cs
- HtmlInputControl.cs
- XamlWrappingReader.cs
- HttpInputStream.cs
- SqlVersion.cs
- Misc.cs
- GPRECT.cs
- GroupBox.cs
- NamespaceEmitter.cs
- AsyncCompletedEventArgs.cs