Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / BufferAllocator.cs / 1 / BufferAllocator.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* * Buffer Allocators with recycling * * Copyright (c) 1999 Microsoft Corporation */ namespace System.Web { using System.Collections; using System.IO; using System.Globalization; using System.Web.Util; ////////////////////////////////////////////////////////////////////////////// // Generic buffer recycling /* * Base class for allocator doing buffer recycling */ internal abstract class BufferAllocator { private int _maxFree; private int _numFree; private Stack _buffers; private static int s_ProcsFudgeFactor; static BufferAllocator() { s_ProcsFudgeFactor = SystemInfo.GetNumProcessCPUs(); if (s_ProcsFudgeFactor < 1) s_ProcsFudgeFactor = 1; if (s_ProcsFudgeFactor > 4) s_ProcsFudgeFactor = 4; } internal BufferAllocator(int maxFree) { _buffers = new Stack(); _numFree = 0; _maxFree = maxFree * s_ProcsFudgeFactor; } internal /*public*/ Object GetBuffer() { Object buffer = null; if (_numFree > 0) { lock(this) { if (_numFree > 0) { buffer = _buffers.Pop(); _numFree--; } } } if (buffer == null) buffer = AllocBuffer(); return buffer; } internal void ReuseBuffer(Object buffer) { if (_numFree < _maxFree) { lock(this) { if (_numFree < _maxFree) { _buffers.Push(buffer); _numFree++; } } } } /* * To be implemented by a derived class */ abstract protected Object AllocBuffer(); } /* * Concrete allocator class for ubyte[] buffer recycling */ internal class UbyteBufferAllocator : BufferAllocator { private int _bufferSize; internal UbyteBufferAllocator(int bufferSize, int maxFree) : base(maxFree) { _bufferSize = bufferSize; } protected override Object AllocBuffer() { return new byte[_bufferSize]; } } /* * Concrete allocator class for char[] buffer recycling */ internal class CharBufferAllocator : BufferAllocator { private int _bufferSize; internal CharBufferAllocator(int bufferSize, int maxFree) : base(maxFree) { _bufferSize = bufferSize; } protected override Object AllocBuffer() { return new char[_bufferSize]; } } /* * Concrete allocator class for int[] buffer recycling */ internal class IntegerArrayAllocator : BufferAllocator { private int _arraySize; internal IntegerArrayAllocator(int arraySize, int maxFree) : base(maxFree) { _arraySize = arraySize; } protected override Object AllocBuffer() { return new int[_arraySize]; } } /* * Concrete allocator class for IntPtr[] buffer recycling */ internal class IntPtrArrayAllocator : BufferAllocator { private int _arraySize; internal IntPtrArrayAllocator(int arraySize, int maxFree) : base(maxFree) { _arraySize = arraySize; } protected override Object AllocBuffer() { return new IntPtr[_arraySize]; } } }
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- ErrorHandler.cs
- AnimationClock.cs
- XmlSchemaAnyAttribute.cs
- UnsafeNativeMethods.cs
- UnaryExpression.cs
- WebServiceErrorEvent.cs
- HostExecutionContextManager.cs
- ControlCollection.cs
- SystemIPv4InterfaceProperties.cs
- SingleResultAttribute.cs
- HtmlEmptyTagControlBuilder.cs
- QilStrConcat.cs
- GeometryHitTestResult.cs
- AssemblyName.cs
- WebBrowserPermission.cs
- StrongTypingException.cs
- ValidateNames.cs
- IISMapPath.cs
- HtmlControlDesigner.cs
- X509Extension.cs
- PluralizationService.cs
- XmlEnumAttribute.cs
- Scalars.cs
- MenuDesigner.cs
- EntityCommandExecutionException.cs
- CaseCqlBlock.cs
- PathParser.cs
- DbXmlEnabledProviderManifest.cs
- Visual3DCollection.cs
- DiscoveryEndpoint.cs
- BinaryConverter.cs
- InternalPolicyElement.cs
- WebPartConnectionsConfigureVerb.cs
- RangeBaseAutomationPeer.cs
- Helpers.cs
- StorageBasedPackageProperties.cs
- XDRSchema.cs
- ConstraintCollection.cs
- CodeConstructor.cs
- CriticalExceptions.cs
- InputQueueChannelAcceptor.cs
- Selection.cs
- RepeatInfo.cs
- DifferencingCollection.cs
- processwaithandle.cs
- CaseCqlBlock.cs
- MarshalDirectiveException.cs
- SqlDataSourceQueryEditor.cs
- PropertyDescriptors.cs
- Compiler.cs
- InfoCardRSAPKCS1KeyExchangeFormatter.cs
- RoutedEventHandlerInfo.cs
- WebPartConnectionsCancelVerb.cs
- SessionSymmetricMessageSecurityProtocolFactory.cs
- ContentElementCollection.cs
- BinHexEncoding.cs
- ByteAnimationBase.cs
- XmlSchemaComplexContentExtension.cs
- XmlSchemaImporter.cs
- CheckPair.cs
- Calendar.cs
- SymmetricAlgorithm.cs
- ValidationRuleCollection.cs
- PackWebResponse.cs
- X509Certificate2.cs
- SystemWebExtensionsSectionGroup.cs
- X509Certificate2.cs
- MultipartContentParser.cs
- Pointer.cs
- ConsumerConnectionPointCollection.cs
- SemanticResolver.cs
- CngUIPolicy.cs
- InvalidDataException.cs
- CryptoProvider.cs
- FunctionDescription.cs
- IndentedTextWriter.cs
- TextEncodedRawTextWriter.cs
- MimeFormImporter.cs
- FormViewUpdateEventArgs.cs
- DiscoveryViaBehavior.cs
- BaseCodePageEncoding.cs
- TimeZone.cs
- IDQuery.cs
- Stroke2.cs
- BatchParser.cs
- MasterPage.cs
- GPPOINT.cs
- ErrorRuntimeConfig.cs
- ScrollBar.cs
- UnsafeNativeMethods.cs
- FontStyles.cs
- HttpValueCollection.cs
- ClickablePoint.cs
- SupportsPreviewControlAttribute.cs
- RangeValuePattern.cs
- InstalledFontCollection.cs
- HyperlinkAutomationPeer.cs
- ObjectHandle.cs
- ServicePoint.cs
- ParseChildrenAsPropertiesAttribute.cs