Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Sys / System / Runtime / InteropServices / HandleCollector.cs / 1305376 / 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.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- EntityViewGenerationAttribute.cs
- securestring.cs
- WebPartDisplayModeCollection.cs
- webproxy.cs
- SelectManyQueryOperator.cs
- ScriptingRoleServiceSection.cs
- PrinterResolution.cs
- HtmlElementErrorEventArgs.cs
- PropertyTab.cs
- SmtpSection.cs
- ConfigXmlWhitespace.cs
- BindingManagerDataErrorEventArgs.cs
- HttpRawResponse.cs
- ConfigXmlAttribute.cs
- SecureStringHasher.cs
- RootNamespaceAttribute.cs
- TypeContext.cs
- ObjectListTitleAttribute.cs
- TcpConnectionPool.cs
- AttachedPropertyDescriptor.cs
- XmlNodeReader.cs
- HostProtectionException.cs
- SendKeys.cs
- ObjectStorage.cs
- CommandHelpers.cs
- ToolbarAUtomationPeer.cs
- BaseCAMarshaler.cs
- PerformanceCounterManager.cs
- MLangCodePageEncoding.cs
- PageVisual.cs
- Converter.cs
- AuthenticationConfig.cs
- BinaryFormatterWriter.cs
- DesignerSerializerAttribute.cs
- _MultipleConnectAsync.cs
- TreeNodeClickEventArgs.cs
- ImageBrush.cs
- TextFormatterHost.cs
- ApplicationFileCodeDomTreeGenerator.cs
- ExceptionUtility.cs
- MapPathBasedVirtualPathProvider.cs
- SizeConverter.cs
- BamlTreeNode.cs
- SyndicationSerializer.cs
- DataTableNewRowEvent.cs
- InkCanvasAutomationPeer.cs
- SoapServerMethod.cs
- PKCS1MaskGenerationMethod.cs
- BrushMappingModeValidation.cs
- SocketException.cs
- OpenTypeCommon.cs
- MenuItem.cs
- PaintValueEventArgs.cs
- cookie.cs
- LinkedList.cs
- RSAPKCS1SignatureFormatter.cs
- ListViewInsertEventArgs.cs
- SHA384.cs
- EventLogPermission.cs
- User.cs
- ToolStripDropDownButton.cs
- Message.cs
- SerializationInfo.cs
- Attributes.cs
- MembershipPasswordException.cs
- MetadataPropertyCollection.cs
- RuntimeHandles.cs
- LocalizableResourceBuilder.cs
- ApplicationBuildProvider.cs
- SelectionWordBreaker.cs
- WebBaseEventKeyComparer.cs
- TypeUtils.cs
- IntSecurity.cs
- CodeDOMUtility.cs
- PositiveTimeSpanValidator.cs
- UMPAttributes.cs
- ViewCellSlot.cs
- _Events.cs
- PartialCachingAttribute.cs
- WebReference.cs
- PropertyTab.cs
- BaseTemplateParser.cs
- ParameterRefs.cs
- EntitySqlQueryCacheKey.cs
- ListViewInsertEventArgs.cs
- FlagsAttribute.cs
- SqlDataSourceStatusEventArgs.cs
- DataFormat.cs
- SyndicationContent.cs
- Scheduling.cs
- BaseParagraph.cs
- BuildProvidersCompiler.cs
- Calendar.cs
- Normalization.cs
- Int32CAMarshaler.cs
- IIS7UserPrincipal.cs
- PropertyConverter.cs
- diagnosticsswitches.cs
- FontInfo.cs
- MessageBox.cs