Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / wpf / src / Framework / MS / Internal / PtsHost / PageBreakRecord.cs / 1 / PageBreakRecord.cs
//---------------------------------------------------------------------------- // // Copyright (C) Microsoft Corporation. All rights reserved. // // File: PageBreakRecord.cs // // Description: Break records for PTS pages. // //--------------------------------------------------------------------------- using System; // IntPtr, IDisposable, ... using System.Threading; // Interlocked using System.Security; // SecurityCritical using MS.Internal.PtsHost.UnsafeNativeMethods; // PTS namespace MS.Internal.PtsHost { ////// PageBreakRecord is used to represent a break record for top level PTS /// page. Points to break record structure of PTS page. /// internal sealed class PageBreakRecord : IDisposable { //------------------------------------------------------------------- // // Constructors // //------------------------------------------------------------------- #region Constructors ////// Constructor. /// /// Current PTS Context. /// PTS page break record. /// Page number. internal PageBreakRecord(PtsContext ptsContext, SecurityCriticalDataForSetbr, int pageNumber) { Invariant.Assert(ptsContext != null, "Invalid PtsContext object."); Invariant.Assert(br.Value != IntPtr.Zero, "Invalid break record object."); _br = br; _pageNumber = pageNumber; // In the finalizer we may need to reference an object instance // to do the right cleanup. For this reason store a WeakReference // to such object. _ptsContext = new WeakReference(ptsContext); // BreakRecord contains unmanaged resources that need to be released when // BreakRecord is destroyed or Dispatcher is closing. For this reason keep // track of this BreakRecord in PtsContext. ptsContext.OnPageBreakRecordCreated(_br); } /// /// Finalizer - releases unmanaged resources. /// ~PageBreakRecord() { Dispose(false); } #endregion Constructors //-------------------------------------------------------------------- // // Public Methods // //------------------------------------------------------------------- #region Public Methods ////// Dispose allocated resources. /// public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } #endregion Public Methods //-------------------------------------------------------------------- // // Internal Properties // //-------------------------------------------------------------------- #region Internal Properties ////// PTS page break record. /// internal IntPtr BreakRecord { get { return _br.Value; } } ////// Page number of the page starting at the break position. /// internal int PageNumber { get { return _pageNumber; } } #endregion Internal Properties //------------------------------------------------------------------- // // Private Methods // //-------------------------------------------------------------------- #region Private Methods ////// Destroys all unmanaged resources. /// /// Whether dispose is caused by explicit call to Dispose. ////// Finalizer needs to follow rules below: /// a) Your Finalize method must tolerate partially constructed instances. /// b) Your Finalize method must consider the consequence of failure. /// c) Your object is callable after Finalization. /// d) Your object is callable during Finalization. /// e) Your Finalizer could be called multiple times. /// f) Your Finalizer runs in a delicate security context. /// See: http://blogs.msdn.com/[....]/archive/2004/02/20/77460.aspx /// ////// Critical, because sets SecurityCriticalDataForSet. /// Safe, because sets SecurityCriticalDataForSet to IntPtr.Zero, which is safe. /// [SecurityCritical, SecurityTreatAsSafe] private void Dispose(bool disposing) { PtsContext ptsContext = null; // Do actual dispose only once. if (Interlocked.CompareExchange(ref _disposed, 1, 0) == 0) { // Dispose PTS break record. // According to following article the entire reachable graph from // a finalizable object is promoted, and it is safe to access its // members if they do not have their own finalizers. // Hence it is OK to access _ptsContext during finalization. // See: http://blogs.msdn.com/[....]/archive/2004/02/20/77460.aspx ptsContext = _ptsContext.Target as PtsContext; if (ptsContext != null && !ptsContext.Disposed) { // Notify PtsContext that BreakRecord is not used anymore, so all // associated resources can by destroyed. ptsContext.OnPageBreakRecordDisposed(_br, disposing); } // Cleanup the state. _br.Value = IntPtr.Zero; _ptsContext = null; } } #endregion Private Methods //------------------------------------------------------------------- // // Private Fields // //------------------------------------------------------------------- #region Private Fields ////// PTS page break record. /// private SecurityCriticalDataForSet_br; /// /// Page number of the page starting at the break position. /// private readonly int _pageNumber; ////// In the finalizer we may need to reference an instance of PtsContext /// to do the right cleanup. For this reason store a WeakReference /// to it. /// private WeakReference _ptsContext; ////// Whether object is already disposed. /// private int _disposed; #endregion Private Fields } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //---------------------------------------------------------------------------- // // Copyright (C) Microsoft Corporation. All rights reserved. // // File: PageBreakRecord.cs // // Description: Break records for PTS pages. // //--------------------------------------------------------------------------- using System; // IntPtr, IDisposable, ... using System.Threading; // Interlocked using System.Security; // SecurityCritical using MS.Internal.PtsHost.UnsafeNativeMethods; // PTS namespace MS.Internal.PtsHost { ////// PageBreakRecord is used to represent a break record for top level PTS /// page. Points to break record structure of PTS page. /// internal sealed class PageBreakRecord : IDisposable { //------------------------------------------------------------------- // // Constructors // //------------------------------------------------------------------- #region Constructors ////// Constructor. /// /// Current PTS Context. /// PTS page break record. /// Page number. internal PageBreakRecord(PtsContext ptsContext, SecurityCriticalDataForSetbr, int pageNumber) { Invariant.Assert(ptsContext != null, "Invalid PtsContext object."); Invariant.Assert(br.Value != IntPtr.Zero, "Invalid break record object."); _br = br; _pageNumber = pageNumber; // In the finalizer we may need to reference an object instance // to do the right cleanup. For this reason store a WeakReference // to such object. _ptsContext = new WeakReference(ptsContext); // BreakRecord contains unmanaged resources that need to be released when // BreakRecord is destroyed or Dispatcher is closing. For this reason keep // track of this BreakRecord in PtsContext. ptsContext.OnPageBreakRecordCreated(_br); } /// /// Finalizer - releases unmanaged resources. /// ~PageBreakRecord() { Dispose(false); } #endregion Constructors //-------------------------------------------------------------------- // // Public Methods // //------------------------------------------------------------------- #region Public Methods ////// Dispose allocated resources. /// public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } #endregion Public Methods //-------------------------------------------------------------------- // // Internal Properties // //-------------------------------------------------------------------- #region Internal Properties ////// PTS page break record. /// internal IntPtr BreakRecord { get { return _br.Value; } } ////// Page number of the page starting at the break position. /// internal int PageNumber { get { return _pageNumber; } } #endregion Internal Properties //------------------------------------------------------------------- // // Private Methods // //-------------------------------------------------------------------- #region Private Methods ////// Destroys all unmanaged resources. /// /// Whether dispose is caused by explicit call to Dispose. ////// Finalizer needs to follow rules below: /// a) Your Finalize method must tolerate partially constructed instances. /// b) Your Finalize method must consider the consequence of failure. /// c) Your object is callable after Finalization. /// d) Your object is callable during Finalization. /// e) Your Finalizer could be called multiple times. /// f) Your Finalizer runs in a delicate security context. /// See: http://blogs.msdn.com/[....]/archive/2004/02/20/77460.aspx /// ////// Critical, because sets SecurityCriticalDataForSet. /// Safe, because sets SecurityCriticalDataForSet to IntPtr.Zero, which is safe. /// [SecurityCritical, SecurityTreatAsSafe] private void Dispose(bool disposing) { PtsContext ptsContext = null; // Do actual dispose only once. if (Interlocked.CompareExchange(ref _disposed, 1, 0) == 0) { // Dispose PTS break record. // According to following article the entire reachable graph from // a finalizable object is promoted, and it is safe to access its // members if they do not have their own finalizers. // Hence it is OK to access _ptsContext during finalization. // See: http://blogs.msdn.com/[....]/archive/2004/02/20/77460.aspx ptsContext = _ptsContext.Target as PtsContext; if (ptsContext != null && !ptsContext.Disposed) { // Notify PtsContext that BreakRecord is not used anymore, so all // associated resources can by destroyed. ptsContext.OnPageBreakRecordDisposed(_br, disposing); } // Cleanup the state. _br.Value = IntPtr.Zero; _ptsContext = null; } } #endregion Private Methods //------------------------------------------------------------------- // // Private Fields // //------------------------------------------------------------------- #region Private Fields ////// PTS page break record. /// private SecurityCriticalDataForSet_br; /// /// Page number of the page starting at the break position. /// private readonly int _pageNumber; ////// In the finalizer we may need to reference an instance of PtsContext /// to do the right cleanup. For this reason store a WeakReference /// to it. /// private WeakReference _ptsContext; ////// Whether object is already disposed. /// private int _disposed; #endregion Private Fields } } // 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
- _ConnectionGroup.cs
- InternalConfigSettingsFactory.cs
- Int16AnimationUsingKeyFrames.cs
- GeometryHitTestResult.cs
- CheckedListBox.cs
- DynamicUpdateCommand.cs
- DataStreamFromComStream.cs
- HotCommands.cs
- Timer.cs
- Paragraph.cs
- OperationParameterInfoCollection.cs
- TemplatedWizardStep.cs
- MailSettingsSection.cs
- PageThemeCodeDomTreeGenerator.cs
- ManualWorkflowSchedulerService.cs
- DuplicateWaitObjectException.cs
- ArgumentException.cs
- Util.cs
- Vector3DKeyFrameCollection.cs
- SoapFault.cs
- JsonDeserializer.cs
- Int16AnimationBase.cs
- GACIdentityPermission.cs
- ExitEventArgs.cs
- WindowShowOrOpenTracker.cs
- TokenBasedSet.cs
- KerberosSecurityTokenProvider.cs
- ReadOnlyDictionary.cs
- UpdateTracker.cs
- TrimSurroundingWhitespaceAttribute.cs
- ConsoleKeyInfo.cs
- XPathNodeIterator.cs
- EntityDescriptor.cs
- XPathEmptyIterator.cs
- WebFaultException.cs
- Missing.cs
- _HTTPDateParse.cs
- RecipientIdentity.cs
- DataGridViewUtilities.cs
- panel.cs
- StandardMenuStripVerb.cs
- HtmlControlPersistable.cs
- ListViewTableRow.cs
- XmlResolver.cs
- oledbconnectionstring.cs
- ButtonAutomationPeer.cs
- PermissionSetEnumerator.cs
- NativeWrapper.cs
- WebPartHelpVerb.cs
- CalendarAutoFormatDialog.cs
- XamlStream.cs
- TextServicesDisplayAttributePropertyRanges.cs
- UnmanagedHandle.cs
- ProvidersHelper.cs
- BackgroundFormatInfo.cs
- ObjectDataSourceView.cs
- XMLSyntaxException.cs
- DataSysAttribute.cs
- CertificateReferenceElement.cs
- StateChangeEvent.cs
- EntityDataSourceViewSchema.cs
- PagerSettings.cs
- Hashtable.cs
- DurableOperationContext.cs
- NullableConverter.cs
- BooleanKeyFrameCollection.cs
- SmiXetterAccessMap.cs
- DescendantQuery.cs
- OdbcInfoMessageEvent.cs
- AttributeUsageAttribute.cs
- WsdlInspector.cs
- WebServiceReceiveDesigner.cs
- Int64Converter.cs
- RenderingBiasValidation.cs
- HyperLinkField.cs
- TextRangeProviderWrapper.cs
- StorageModelBuildProvider.cs
- NameTable.cs
- SharedDp.cs
- EntityCommandCompilationException.cs
- InlineUIContainer.cs
- OracleBFile.cs
- CheckBoxRenderer.cs
- FilteredDataSetHelper.cs
- DetailsViewPagerRow.cs
- HierarchicalDataSourceControl.cs
- StringExpressionSet.cs
- CodeTypeDeclarationCollection.cs
- HttpProfileGroupBase.cs
- DBSchemaRow.cs
- SapiGrammar.cs
- DataTableReader.cs
- WebEvents.cs
- PackWebRequest.cs
- Environment.cs
- Content.cs
- SchemaTableOptionalColumn.cs
- Int64.cs
- namescope.cs
- SettingsAttributeDictionary.cs