Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / clr / src / BCL / System / Reflection / Cache / InternalCache.cs / 1 / InternalCache.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== /*============================================================ ** ** Class: InternalCache ** ** ** Purpose: A high-performance internal caching class. All key ** lookups are done on the basis of the CacheObjType enum. The ** cache is limited to one object of any particular type per ** instance. ** ** ============================================================*/ using System; using System.Threading; using System.Diagnostics; using System.Runtime.CompilerServices; using System.Runtime.Remoting.Metadata; namespace System.Reflection.Cache { [Serializable] internal enum CacheAction { AllocateCache = 1, AddItem = 2, ClearCache = 3, LookupItemHit = 4, LookupItemMiss = 5, GrowCache = 6, SetItemReplace = 7, ReplaceFailed = 8 } [Serializable] internal class InternalCache { private const int MinCacheSize = 2; //We'll start the cache as null and only grow it as we need it. private InternalCacheItem[] m_cache=null; private int m_numItems = 0; // private bool m_copying = false; //Knowing the name of the cache is very useful for debugging, but we don't //want to take the working-set hit in the debug build. We'll only include //the field in that build. #if _LOGGING private String m_cacheName; #endif internal InternalCache(String cacheName) { #if _LOGGING m_cacheName = cacheName; #endif //We won't allocate any items until the first time that they're requested. } internal Object this[CacheObjType cacheType] { get { //Let's snapshot a reference to the array up front so that //we don't have to worry about any writers. It's important //to grab the cache first and then numItems. In the event that //the cache gets cleared, m_numItems will be set to 0 before //we actually release the cache. Getting it second will cause //us to walk only 0 elements, but not to fault. InternalCacheItem[] cache = m_cache; int numItems = m_numItems; int position = FindObjectPosition(cache, numItems, cacheType, false); if (position>=0) { if (!BCLDebug.m_loggingNotEnabled) LogAction(CacheAction.LookupItemHit, cacheType, cache[position].Value); return cache[position].Value; } //Couldn't find it -- oh, well. if (!BCLDebug.m_loggingNotEnabled) LogAction(CacheAction.LookupItemMiss, cacheType); return null; } set { int position; if (!BCLDebug.m_loggingNotEnabled) LogAction(CacheAction.AddItem, cacheType, value); lock(this) { position = FindObjectPosition(m_cache, m_numItems, cacheType, true); if (position>0) { m_cache[position].Value = value; m_cache[position].Key = cacheType; if (position==m_numItems) { m_numItems++; } return; } if (m_cache==null) { if (!BCLDebug.m_loggingNotEnabled) LogAction(CacheAction.AllocateCache, cacheType); // m_copying = true; m_cache = new InternalCacheItem[MinCacheSize]; m_cache[0].Value = value; m_cache[0].Key = cacheType; m_numItems = 1; // m_copying = false; } else { if (!BCLDebug.m_loggingNotEnabled) LogAction(CacheAction.GrowCache, cacheType); // m_copying = true; InternalCacheItem[] tempCache = new InternalCacheItem[m_numItems * 2]; for (int i=0; icache.Length) { itemCount = cache.Length; } for (int i=0; i =0) { if (!BCLDebug.m_loggingNotEnabled) LogAction(CacheAction.LookupItemHit, cacheType, cache[position].Value); return cache[position].Value; } //Couldn't find it -- oh, well. if (!BCLDebug.m_loggingNotEnabled) LogAction(CacheAction.LookupItemMiss, cacheType); return null; } set { int position; if (!BCLDebug.m_loggingNotEnabled) LogAction(CacheAction.AddItem, cacheType, value); lock(this) { position = FindObjectPosition(m_cache, m_numItems, cacheType, true); if (position>0) { m_cache[position].Value = value; m_cache[position].Key = cacheType; if (position==m_numItems) { m_numItems++; } return; } if (m_cache==null) { if (!BCLDebug.m_loggingNotEnabled) LogAction(CacheAction.AllocateCache, cacheType); // m_copying = true; m_cache = new InternalCacheItem[MinCacheSize]; m_cache[0].Value = value; m_cache[0].Key = cacheType; m_numItems = 1; // m_copying = false; } else { if (!BCLDebug.m_loggingNotEnabled) LogAction(CacheAction.GrowCache, cacheType); // m_copying = true; InternalCacheItem[] tempCache = new InternalCacheItem[m_numItems * 2]; for (int i=0; i cache.Length) { itemCount = cache.Length; } for (int i=0; i
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- XmlQualifiedNameTest.cs
- WorkBatch.cs
- SendOperation.cs
- JsonMessageEncoderFactory.cs
- HttpResponseHeader.cs
- SimpleLine.cs
- ColumnMapProcessor.cs
- CustomAttributeSerializer.cs
- ToolStripItemEventArgs.cs
- DateTimeConstantAttribute.cs
- ItemAutomationPeer.cs
- RelatedView.cs
- SQLStringStorage.cs
- HttpVersion.cs
- InstancePersistenceCommand.cs
- RegexCompiler.cs
- GestureRecognitionResult.cs
- ProcessHostFactoryHelper.cs
- DirectionalLight.cs
- Duration.cs
- CodeDelegateInvokeExpression.cs
- AssemblyAttributesGoHere.cs
- SingleConverter.cs
- ProcessHostMapPath.cs
- UriWriter.cs
- StylusPointProperties.cs
- CoTaskMemHandle.cs
- XmlBindingWorker.cs
- DesignerTextViewAdapter.cs
- ToolStripPanel.cs
- ClientSession.cs
- AttachedAnnotationChangedEventArgs.cs
- DetailsView.cs
- SqlVisitor.cs
- PageStatePersister.cs
- ObjectContextServiceProvider.cs
- QEncodedStream.cs
- FilteredAttributeCollection.cs
- TextServicesLoader.cs
- JavaScriptSerializer.cs
- FactoryGenerator.cs
- ErrorsHelper.cs
- SchemaMapping.cs
- UpnEndpointIdentityExtension.cs
- ShapeTypeface.cs
- SrgsDocumentParser.cs
- AutomationPropertyInfo.cs
- NavigationPropertyEmitter.cs
- KeyFrames.cs
- SecurityUtils.cs
- FlowNode.cs
- Variable.cs
- ZipIOBlockManager.cs
- ObjectFactoryCodeDomTreeGenerator.cs
- ResourceCodeDomSerializer.cs
- ArgumentsParser.cs
- MarkupProperty.cs
- ContractListAdapter.cs
- InstanceData.cs
- CipherData.cs
- MediaPlayer.cs
- DataGridViewControlCollection.cs
- TextDecoration.cs
- ProfilePropertyNameValidator.cs
- JsonWriterDelegator.cs
- VerticalAlignConverter.cs
- WebPartHelpVerb.cs
- LambdaExpression.cs
- Aggregates.cs
- PropertySourceInfo.cs
- SecurityTokenProvider.cs
- EpmTargetTree.cs
- MasterPageParser.cs
- DependencyProperty.cs
- PropertyDescriptorGridEntry.cs
- FontUnit.cs
- linebase.cs
- documentsequencetextview.cs
- PkcsMisc.cs
- EmptyImpersonationContext.cs
- UnsafeNativeMethods.cs
- NavigationService.cs
- WebConfigurationManager.cs
- GenericsNotImplementedException.cs
- TimerEventSubscription.cs
- XmlBindingWorker.cs
- LockCookie.cs
- ChangeConflicts.cs
- TaskFormBase.cs
- ControlPager.cs
- ChtmlTextWriter.cs
- XmlSerializableWriter.cs
- RecognizeCompletedEventArgs.cs
- ClonableStack.cs
- Resources.Designer.cs
- MethodRental.cs
- AuthenticatedStream.cs
- XmlSchemaInfo.cs
- InputDevice.cs
- CodeSubDirectory.cs