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
- ListViewDeleteEventArgs.cs
- ServiceReference.cs
- BinaryConverter.cs
- WpfXamlMember.cs
- XsdBuilder.cs
- XsdCachingReader.cs
- SetterBase.cs
- MailSettingsSection.cs
- ContentControl.cs
- PropertyItemInternal.cs
- Activity.cs
- WebRequest.cs
- TextureBrush.cs
- SqlFlattener.cs
- ResourceCodeDomSerializer.cs
- DocumentSchemaValidator.cs
- Soap12ProtocolReflector.cs
- DataGridViewRowHeightInfoPushedEventArgs.cs
- FileLoadException.cs
- OracleCommandBuilder.cs
- HttpResponseBase.cs
- DetailsViewRowCollection.cs
- ZoneIdentityPermission.cs
- StrongNameUtility.cs
- PropertyGrid.cs
- Material.cs
- ButtonFlatAdapter.cs
- EmptyControlCollection.cs
- IconConverter.cs
- JsonByteArrayDataContract.cs
- XmlSchemaSimpleType.cs
- QuotaExceededException.cs
- BitmapFrame.cs
- Scripts.cs
- HttpListenerElement.cs
- StrokeDescriptor.cs
- TextSelectionProcessor.cs
- PageRouteHandler.cs
- ItemMap.cs
- PersonalizationProvider.cs
- ComplusTypeValidator.cs
- ExpressionBuilderCollection.cs
- SpeechRecognizer.cs
- HotSpotCollectionEditor.cs
- MediaContext.cs
- SelectionItemPattern.cs
- HttpHandlerActionCollection.cs
- TabRenderer.cs
- DataGridViewTopLeftHeaderCell.cs
- FixedSOMTableCell.cs
- ScriptManager.cs
- GridViewEditEventArgs.cs
- ErrorLog.cs
- StandardToolWindows.cs
- DataBindingExpressionBuilder.cs
- StringSorter.cs
- WebBrowsableAttribute.cs
- HttpConfigurationContext.cs
- HashCryptoHandle.cs
- GroupQuery.cs
- webclient.cs
- ToolStripProgressBar.cs
- TypeCodeDomSerializer.cs
- CheckBox.cs
- GACIdentityPermission.cs
- IdentityElement.cs
- panel.cs
- MethodCallConverter.cs
- SqlConnectionString.cs
- ToolStripPanelRow.cs
- StringConverter.cs
- AutoCompleteStringCollection.cs
- WindowsToolbarAsMenu.cs
- SignHashRequest.cs
- XmlBindingWorker.cs
- EpmHelper.cs
- Constraint.cs
- RelationshipWrapper.cs
- AliasExpr.cs
- _BufferOffsetSize.cs
- XsltConvert.cs
- DataListCommandEventArgs.cs
- ManagementScope.cs
- ImmutableCommunicationTimeouts.cs
- BamlStream.cs
- WebConfigManager.cs
- ListViewTableCell.cs
- CharStorage.cs
- DataSourceBooleanViewSchemaConverter.cs
- DockAndAnchorLayout.cs
- LostFocusEventManager.cs
- PauseStoryboard.cs
- WbmpConverter.cs
- SortFieldComparer.cs
- Proxy.cs
- XmlQueryCardinality.cs
- DataSourceHelper.cs
- NameTable.cs
- BufferedStream.cs
- WebPartRestoreVerb.cs