Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WCF / infocard / common / managed / GlobalAllocSafeHandle.cs / 1305376 / GlobalAllocSafeHandle.cs
//------------------------------------------------------------------------------ // Copyright (c) Microsoft Corporation. All rights reserved. //----------------------------------------------------------------------------- namespace Microsoft.InfoCards { using System; using System.Runtime.InteropServices; using System.Runtime.CompilerServices; using System.Runtime.ConstrainedExecution; using System.Security; using Microsoft.InfoCards.Diagnostics; using IDT=Microsoft.InfoCards.Diagnostics.InfoCardTrace; // // Summary: // Provides a wrapper over memory allocated by GlobalAlloc // guaranteeing that it will be freed during rude thread / appdomain unloads. // Remarks: // There is a small ---- in the usage of this class, as it is used to wrap return parameters // immediatley following the function return. // internal class GlobalAllocSafeHandle : SafeHandle { [SuppressUnmanagedCodeSecurity] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] [DllImport("Kernel32.dll", EntryPoint="RtlZeroMemory", SetLastError=false)] public static extern void ZeroMemory( IntPtr dest, Int32 size ); [SuppressUnmanagedCodeSecurity] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] [DllImport( "kernel32.dll", CallingConvention = CallingConvention.StdCall )] public static extern IntPtr GlobalFree( IntPtr hMem ); // // How many bytes we currently wrap. This can be zero, as our usage allows for a valid handle // backed by 0 bytes of allocated memory - specificially TransformBlock and TransformFinalBlock // can return this by design. // private int m_bytes; private GlobalAllocSafeHandle() : base( IntPtr.Zero, true ) { m_bytes = 0; } public int Length { set{ m_bytes = value; } get{ return m_bytes; } } public override bool IsInvalid { get { return ( IntPtr.Zero == base.handle ); } } // // Summary: // Clear the data held and release the memory. // protected override bool ReleaseHandle() { if( m_bytes > 0 ) { ZeroMemory( base.handle, m_bytes ); GlobalFree( base.handle ); m_bytes = 0; } 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
- SynchronousReceiveElement.cs
- TreeViewItemAutomationPeer.cs
- UpDownEvent.cs
- ObjectFactoryCodeDomTreeGenerator.cs
- PriorityBinding.cs
- ControlEvent.cs
- DbCommandTree.cs
- ScalarOps.cs
- CodeActivity.cs
- ToolStripContainerDesigner.cs
- XPathNodeHelper.cs
- DefaultClaimSet.cs
- XmlComplianceUtil.cs
- BoolExpression.cs
- DataGridViewImageColumn.cs
- Size.cs
- ListViewItem.cs
- QilXmlWriter.cs
- Html32TextWriter.cs
- QilLiteral.cs
- IndentedTextWriter.cs
- HitTestWithPointDrawingContextWalker.cs
- FormViewRow.cs
- HighlightOverlayGlyph.cs
- CreateUserWizardStep.cs
- StringPropertyBuilder.cs
- ResourceDisplayNameAttribute.cs
- EpmSyndicationContentDeSerializer.cs
- LOSFormatter.cs
- DateTime.cs
- XmlCDATASection.cs
- ConnectionPoolManager.cs
- DataColumnPropertyDescriptor.cs
- ProxyHelper.cs
- RenderContext.cs
- CorrelationManager.cs
- ColumnTypeConverter.cs
- EdmProviderManifest.cs
- parserscommon.cs
- ParsedAttributeCollection.cs
- ReadOnlyKeyedCollection.cs
- _NetRes.cs
- AssociationTypeEmitter.cs
- SslStream.cs
- MaskInputRejectedEventArgs.cs
- FaultPropagationQuery.cs
- ListViewDeletedEventArgs.cs
- String.cs
- sapiproxy.cs
- SiteOfOriginPart.cs
- ConnectionProviderAttribute.cs
- SoapRpcServiceAttribute.cs
- DocumentsTrace.cs
- TextHidden.cs
- Parser.cs
- PathStreamGeometryContext.cs
- PeerNameRegistration.cs
- Single.cs
- HtmlButton.cs
- AutomationAttributeInfo.cs
- WhiteSpaceTrimStringConverter.cs
- ProfileSection.cs
- ToolboxComponentsCreatedEventArgs.cs
- LiteralControl.cs
- RemotingSurrogateSelector.cs
- KnownTypesProvider.cs
- UnicastIPAddressInformationCollection.cs
- _TransmitFileOverlappedAsyncResult.cs
- PreservationFileWriter.cs
- DataSet.cs
- DataFormats.cs
- DataGrid.cs
- EntityContainer.cs
- OuterGlowBitmapEffect.cs
- ConsoleCancelEventArgs.cs
- SemaphoreFullException.cs
- BevelBitmapEffect.cs
- CollectionDataContractAttribute.cs
- SymbolDocumentGenerator.cs
- BlurBitmapEffect.cs
- XPathDocumentIterator.cs
- SectionInput.cs
- XmlLanguageConverter.cs
- Axis.cs
- AssemblyBuilder.cs
- ComboBoxRenderer.cs
- ImportOptions.cs
- DataGridViewBindingCompleteEventArgs.cs
- PartialClassGenerationTaskInternal.cs
- DbCommandTree.cs
- BroadcastEventHelper.cs
- CreateUserWizard.cs
- DesignerForm.cs
- Slider.cs
- CommandHelpers.cs
- CorrelationToken.cs
- MarshalByValueComponent.cs
- WaitHandleCannotBeOpenedException.cs
- TextBoxBaseDesigner.cs
- GlobalizationSection.cs