Code:
/ WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / infocard / common / managed / HGlobalSafeHandle.cs / 1 / 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. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- SID.cs
- ReferenceConverter.cs
- UriSection.cs
- TypedTableBaseExtensions.cs
- WebPartRestoreVerb.cs
- TCPClient.cs
- DrawingImage.cs
- DataContractJsonSerializerOperationFormatter.cs
- AppliedDeviceFiltersDialog.cs
- BuiltInExpr.cs
- SupportsEventValidationAttribute.cs
- PinnedBufferMemoryStream.cs
- Column.cs
- SqlCachedBuffer.cs
- SmiMetaDataProperty.cs
- DataGrid.cs
- AbstractSvcMapFileLoader.cs
- VarRemapper.cs
- Button.cs
- AnchoredBlock.cs
- ParallelQuery.cs
- XPathSingletonIterator.cs
- WebAdminConfigurationHelper.cs
- ListItemCollection.cs
- HtmlControl.cs
- CustomValidator.cs
- SQLSingleStorage.cs
- PagesSection.cs
- Scene3D.cs
- ToolStripItemRenderEventArgs.cs
- Size3DValueSerializer.cs
- DescendantBaseQuery.cs
- unitconverter.cs
- ScalarConstant.cs
- SiteMapDataSourceView.cs
- NativeActivityAbortContext.cs
- DesignBindingPicker.cs
- ControllableStoryboardAction.cs
- X509Certificate.cs
- PathTooLongException.cs
- Normalization.cs
- ConstructorExpr.cs
- QueryStatement.cs
- TrustSection.cs
- LabelDesigner.cs
- ConfigurationSection.cs
- SerializationEventsCache.cs
- ParamArrayAttribute.cs
- ServiceActivationException.cs
- ReachBasicContext.cs
- InputManager.cs
- WindowsPrincipal.cs
- CodeParameterDeclarationExpression.cs
- WindowProviderWrapper.cs
- PropertyCondition.cs
- ScriptIgnoreAttribute.cs
- CodeTryCatchFinallyStatement.cs
- QilBinary.cs
- ProjectionPathBuilder.cs
- DefaultBinder.cs
- GeneratedView.cs
- TimeSpanHelper.cs
- TraceLevelStore.cs
- Button.cs
- CompilerTypeWithParams.cs
- SignatureResourceHelper.cs
- LogWriteRestartAreaAsyncResult.cs
- DefaultObjectMappingItemCollection.cs
- FilteredDataSetHelper.cs
- JumpTask.cs
- CodeNamespace.cs
- AdapterUtil.cs
- SqlReferenceCollection.cs
- rsa.cs
- ImportContext.cs
- ChangePassword.cs
- Animatable.cs
- SqlDataReaderSmi.cs
- RoleManagerSection.cs
- AssemblyAttributes.cs
- PointLight.cs
- InternalSafeNativeMethods.cs
- BaseDataListComponentEditor.cs
- InternalPolicyElement.cs
- PolyQuadraticBezierSegment.cs
- ViewRendering.cs
- DragCompletedEventArgs.cs
- AbandonedMutexException.cs
- listviewsubitemcollectioneditor.cs
- SqlReorderer.cs
- RowUpdatedEventArgs.cs
- PropertyAccessVisitor.cs
- EntitySqlQueryCacheKey.cs
- SafeCryptoKeyHandle.cs
- InkCanvasInnerCanvas.cs
- CommonDialog.cs
- ShapeTypeface.cs
- XmlDocumentViewSchema.cs
- SecurityTokenRequirement.cs
- OleCmdHelper.cs