Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / fx / src / Sys / System / Runtime / InteropServices / HandleCollector.cs / 1 / HandleCollector.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== namespace System.Runtime.InteropServices { using System; using System.Threading; public sealed class HandleCollector { private const int deltaPercent = 10; // this is used for increasing the threshold. private string name; private int initialThreshold; private int maximumThreshold; private int threshold; private int handleCount; private int[] gc_counts = new int [3]; private int gc_gen = 0; public HandleCollector( string name, int initialThreshold ) : this( name, initialThreshold, int.MaxValue) { } public HandleCollector( string name, int initialThreshold, int maximumThreshold ) { if( initialThreshold < 0) { throw new ArgumentOutOfRangeException("initialThreshold", SR.GetString(SR.ArgumentOutOfRange_NeedNonNegNumRequired)); } if( maximumThreshold < 0) { throw new ArgumentOutOfRangeException("maximumThreshold", SR.GetString(SR.ArgumentOutOfRange_NeedNonNegNumRequired)); } if( initialThreshold > maximumThreshold) { throw new ArgumentException(SR.GetString(SR.Argument_InvalidThreshold)); } if ( name != null) { this.name = name; } else { this.name = String.Empty; } this.initialThreshold = initialThreshold; this.maximumThreshold = maximumThreshold ; this.threshold = initialThreshold; this.handleCount = 0; } public int Count { get {return handleCount;} } public int InitialThreshold { get { return initialThreshold;} } public int MaximumThreshold { get { return maximumThreshold;} } public string Name { get {return name;} } [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Reliability", "CA2001:AvoidCallingProblematicMethods")] // Keep call to GC.Collect() public void Add () { int gen_collect = -1; Interlocked.Increment( ref handleCount); if( handleCount < 0) { throw new InvalidOperationException(SR.GetString(SR.InvalidOperation_HCCountOverflow)); } if (handleCount > threshold) { lock (this) { threshold = handleCount + (handleCount/deltaPercent); gen_collect = gc_gen; if (gc_gen < 2) { gc_gen++; } } } if ((gen_collect >= 0) && ((gen_collect == 0) || (gc_counts[gen_collect] == GC.CollectionCount (gen_collect)))) { GC.Collect (gen_collect); Thread.Sleep (10*gen_collect); } //don't bother with gen0. for (int i = 1; i < 3; i++) { gc_counts [i] = GC.CollectionCount (i); } } public void Remove () { Interlocked.Decrement( ref handleCount); if (handleCount < 0) { throw new InvalidOperationException(SR.GetString(SR.InvalidOperation_HCCountOverflow)); } int newThreshold = handleCount + handleCount/deltaPercent; if (newThreshold < (threshold - threshold/deltaPercent)) { lock( this) { if (newThreshold > initialThreshold) { threshold = newThreshold; } else { threshold = initialThreshold; } gc_gen = 0; } } for (int i = 1; i < 3; i++) { gc_counts [i] = GC.CollectionCount (i); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== namespace System.Runtime.InteropServices { using System; using System.Threading; public sealed class HandleCollector { private const int deltaPercent = 10; // this is used for increasing the threshold. private string name; private int initialThreshold; private int maximumThreshold; private int threshold; private int handleCount; private int[] gc_counts = new int [3]; private int gc_gen = 0; public HandleCollector( string name, int initialThreshold ) : this( name, initialThreshold, int.MaxValue) { } public HandleCollector( string name, int initialThreshold, int maximumThreshold ) { if( initialThreshold < 0) { throw new ArgumentOutOfRangeException("initialThreshold", SR.GetString(SR.ArgumentOutOfRange_NeedNonNegNumRequired)); } if( maximumThreshold < 0) { throw new ArgumentOutOfRangeException("maximumThreshold", SR.GetString(SR.ArgumentOutOfRange_NeedNonNegNumRequired)); } if( initialThreshold > maximumThreshold) { throw new ArgumentException(SR.GetString(SR.Argument_InvalidThreshold)); } if ( name != null) { this.name = name; } else { this.name = String.Empty; } this.initialThreshold = initialThreshold; this.maximumThreshold = maximumThreshold ; this.threshold = initialThreshold; this.handleCount = 0; } public int Count { get {return handleCount;} } public int InitialThreshold { get { return initialThreshold;} } public int MaximumThreshold { get { return maximumThreshold;} } public string Name { get {return name;} } [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Reliability", "CA2001:AvoidCallingProblematicMethods")] // Keep call to GC.Collect() public void Add () { int gen_collect = -1; Interlocked.Increment( ref handleCount); if( handleCount < 0) { throw new InvalidOperationException(SR.GetString(SR.InvalidOperation_HCCountOverflow)); } if (handleCount > threshold) { lock (this) { threshold = handleCount + (handleCount/deltaPercent); gen_collect = gc_gen; if (gc_gen < 2) { gc_gen++; } } } if ((gen_collect >= 0) && ((gen_collect == 0) || (gc_counts[gen_collect] == GC.CollectionCount (gen_collect)))) { GC.Collect (gen_collect); Thread.Sleep (10*gen_collect); } //don't bother with gen0. for (int i = 1; i < 3; i++) { gc_counts [i] = GC.CollectionCount (i); } } public void Remove () { Interlocked.Decrement( ref handleCount); if (handleCount < 0) { throw new InvalidOperationException(SR.GetString(SR.InvalidOperation_HCCountOverflow)); } int newThreshold = handleCount + handleCount/deltaPercent; if (newThreshold < (threshold - threshold/deltaPercent)) { lock( this) { if (newThreshold > initialThreshold) { threshold = newThreshold; } else { threshold = initialThreshold; } gc_gen = 0; } } for (int i = 1; i < 3; i++) { gc_counts [i] = GC.CollectionCount (i); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
![Network programming in C#, Network Programming in VB.NET, Network Programming in .NET](/images/book.jpg)
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- TypedRowGenerator.cs
- TextDpi.cs
- AssemblyName.cs
- serverconfig.cs
- ActivationServices.cs
- ClientTargetCollection.cs
- FilterableAttribute.cs
- TraceContextEventArgs.cs
- SignalGate.cs
- DataGridViewRowHeightInfoPushedEventArgs.cs
- odbcmetadatacolumnnames.cs
- LifetimeServices.cs
- ContainsSearchOperator.cs
- StatusBarAutomationPeer.cs
- XmlSignatureManifest.cs
- BufferedWebEventProvider.cs
- XmlDomTextWriter.cs
- loginstatus.cs
- EncoderFallback.cs
- MLangCodePageEncoding.cs
- Helper.cs
- BooleanConverter.cs
- SmiSettersStream.cs
- TargetException.cs
- ClickablePoint.cs
- DesignerVerbToolStripMenuItem.cs
- HttpDictionary.cs
- SiteMapProvider.cs
- XmlSerializerVersionAttribute.cs
- LocalizableResourceBuilder.cs
- InteropAutomationProvider.cs
- DictionaryItemsCollection.cs
- DataGridViewColumnStateChangedEventArgs.cs
- nulltextcontainer.cs
- ErrorFormatterPage.cs
- Label.cs
- CollectionBase.cs
- ScrollProviderWrapper.cs
- AppendHelper.cs
- SafeNativeMethods.cs
- XmlDigitalSignatureProcessor.cs
- GeneratedCodeAttribute.cs
- DrawingGroupDrawingContext.cs
- WindowsRichEditRange.cs
- BidOverLoads.cs
- PermissionListSet.cs
- ToolStripGrip.cs
- ComAdminInterfaces.cs
- EndpointAddress10.cs
- OdbcConnection.cs
- KoreanLunisolarCalendar.cs
- AstTree.cs
- XPathSingletonIterator.cs
- WebBrowser.cs
- ComboBoxAutomationPeer.cs
- FileDataSourceCache.cs
- OracleEncoding.cs
- InstalledFontCollection.cs
- DataGridAutoFormatDialog.cs
- ScriptResourceInfo.cs
- ClientScriptItem.cs
- GetPageNumberCompletedEventArgs.cs
- UnsafeNativeMethods.cs
- GridLengthConverter.cs
- Walker.cs
- ValueConversionAttribute.cs
- ConditionValidator.cs
- MetaType.cs
- ColumnCollection.cs
- DrawListViewItemEventArgs.cs
- LowerCaseStringConverter.cs
- BinaryReader.cs
- _TimerThread.cs
- ExpressionContext.cs
- SelectedGridItemChangedEvent.cs
- CellQuery.cs
- ListCommandEventArgs.cs
- CodeCompileUnit.cs
- PartitionResolver.cs
- XPathDocumentNavigator.cs
- TemplatePropertyEntry.cs
- AddDataControlFieldDialog.cs
- WebPartConnection.cs
- HeaderFilter.cs
- DataGridViewRowHeightInfoPushedEventArgs.cs
- CodePageEncoding.cs
- XmlObjectSerializer.cs
- PopupRoot.cs
- DocumentSequence.cs
- RuleElement.cs
- GACMembershipCondition.cs
- DbProviderFactory.cs
- HierarchicalDataTemplate.cs
- ComponentDispatcher.cs
- DynamicScriptObject.cs
- _OverlappedAsyncResult.cs
- CodeExporter.cs
- WmlMobileTextWriter.cs
- login.cs
- Document.cs