Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WCF / infocard / common / managed / HGlobalSafeHandle.cs / 1305376 / HGlobalSafeHandle.cs
//------------------------------------------------------------------------------ // Copyright (c) Microsoft Corporation. All rights reserved. //----------------------------------------------------------------------------- namespace Microsoft.InfoCards { using System; using System.Runtime.InteropServices; using Microsoft.InfoCards.Diagnostics; using System.Runtime.CompilerServices; using System.Runtime.ConstrainedExecution; using System.Security; using IDT=Microsoft.InfoCards.Diagnostics.InfoCardTrace; // // Summary: // Provides a wrapper over HGlobal alloc'd memory guaranteeing that the // contents will be released in the presence of rude app domain and thread aborts. // internal class HGlobalSafeHandle : SafeHandle { public static HGlobalSafeHandle Construct() { return new HGlobalSafeHandle(); } public static HGlobalSafeHandle Construct( string managedString ) { IDT.DebugAssert( !String.IsNullOrEmpty( managedString) , "null string" ); int bytes = (managedString.Length + 1) * 2; return new HGlobalSafeHandle( Marshal.StringToHGlobalUni( managedString ), bytes ); } public static HGlobalSafeHandle Construct( int bytes ) { IDT.DebugAssert( bytes > 0, "attempt to allocate a handle with <= 0 bytes" ); return new HGlobalSafeHandle( Marshal.AllocHGlobal( bytes ), bytes ); } [SuppressUnmanagedCodeSecurity] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] [DllImport("Kernel32.dll", EntryPoint="RtlZeroMemory", SetLastError=false)] public static extern void ZeroMemory( IntPtr dest, Int32 size ); // // The number of bytes allocated. // private int m_bytes; [ReliabilityContract( Consistency.WillNotCorruptState, Cer.Success ) ] private HGlobalSafeHandle( IntPtr toManage, int length ) : base( IntPtr.Zero, true ) { m_bytes = length; SetHandle( toManage ); } private HGlobalSafeHandle() : base( IntPtr.Zero, true ) {} public override bool IsInvalid { get { return ( IntPtr.Zero == base.handle ); } } // // Summary: // Zero the string contents and release the handle // protected override bool ReleaseHandle() { IDT.DebugAssert( !IsInvalid, "handle is invalid in release handle" ); IDT.DebugAssert( 0 != m_bytes, "invalid size" ); ZeroMemory( base.handle, m_bytes ); Marshal.FreeHGlobal( base.handle ); return true; } } } // 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
- MachineSettingsSection.cs
- ConfigurationSectionGroupCollection.cs
- Soap.cs
- TextOutput.cs
- latinshape.cs
- CategoryAttribute.cs
- IntMinMaxAggregationOperator.cs
- SrgsDocument.cs
- HtmlWindowCollection.cs
- MatrixTransform.cs
- TreeViewItemAutomationPeer.cs
- baseshape.cs
- ClipboardData.cs
- TextRunTypographyProperties.cs
- DefaultProxySection.cs
- OracleColumn.cs
- WebPartHelpVerb.cs
- BinaryWriter.cs
- SchemaLookupTable.cs
- EntitySetDataBindingList.cs
- XmlWrappingReader.cs
- ObjectItemAttributeAssemblyLoader.cs
- ActivationWorker.cs
- HtmlAnchor.cs
- TextPattern.cs
- DesignerToolboxInfo.cs
- Flattener.cs
- UnionQueryOperator.cs
- FixedDocument.cs
- ParamArrayAttribute.cs
- Light.cs
- ProcessHost.cs
- SmtpMail.cs
- EmbeddedMailObject.cs
- EventListenerClientSide.cs
- CacheAxisQuery.cs
- RectangleHotSpot.cs
- OleDbError.cs
- CommonDialog.cs
- StaticExtension.cs
- DispatcherTimer.cs
- CodeDOMProvider.cs
- XmlSchemaImport.cs
- WebBrowserSiteBase.cs
- EntityDataSourceViewSchema.cs
- CdpEqualityComparer.cs
- WebRequestModuleElementCollection.cs
- SecurityUtils.cs
- ObjectReaderCompiler.cs
- WebPartDisplayModeEventArgs.cs
- CodeChecksumPragma.cs
- GlyphElement.cs
- GcHandle.cs
- RadioButtonStandardAdapter.cs
- XmlAtomicValue.cs
- PageSettings.cs
- MenuBase.cs
- CodeAccessPermission.cs
- BitmapSourceSafeMILHandle.cs
- Exception.cs
- EventLogPropertySelector.cs
- JsonQNameDataContract.cs
- OperationInfoBase.cs
- BindingExpressionBase.cs
- LinkButton.cs
- TableRowCollection.cs
- ExtensionDataReader.cs
- SafeRightsManagementHandle.cs
- TextStore.cs
- TreeViewHitTestInfo.cs
- TextPointerBase.cs
- _StreamFramer.cs
- CompilationUtil.cs
- ConfigXmlReader.cs
- PathHelper.cs
- PermissionSetTriple.cs
- BuildDependencySet.cs
- SymDocumentType.cs
- AnimatedTypeHelpers.cs
- UnhandledExceptionEventArgs.cs
- Transform.cs
- BamlLocalizabilityResolver.cs
- ChildTable.cs
- TryCatch.cs
- Int32.cs
- Matrix.cs
- ArgumentValidation.cs
- ISAPIWorkerRequest.cs
- ConsoleTraceListener.cs
- InkCollectionBehavior.cs
- MDIClient.cs
- RelationshipSet.cs
- DbgUtil.cs
- LinkUtilities.cs
- ProfessionalColorTable.cs
- Point.cs
- XamlWriter.cs
- DbConnectionPoolOptions.cs
- XmlSerializerNamespaces.cs
- Encoder.cs