Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / 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
- PackageFilter.cs
- XmlSchemaAppInfo.cs
- BuildTopDownAttribute.cs
- ObjectManager.cs
- CryptoHelper.cs
- TypeDescriptor.cs
- SHA256.cs
- VirtualizedItemPattern.cs
- SqlCacheDependencySection.cs
- CodeMethodReturnStatement.cs
- CodeRegionDirective.cs
- BorderGapMaskConverter.cs
- InvokeMethodActivity.cs
- AuditLogLocation.cs
- ImportedNamespaceContextItem.cs
- ColorConvertedBitmap.cs
- _FixedSizeReader.cs
- LogExtentCollection.cs
- HwndSourceKeyboardInputSite.cs
- TerminatorSinks.cs
- PageTheme.cs
- SuppressIldasmAttribute.cs
- DataGridViewColumnEventArgs.cs
- FixedPageProcessor.cs
- Completion.cs
- UInt16Storage.cs
- ProfileManager.cs
- PropertyPathWorker.cs
- Win32Native.cs
- RepeaterItemEventArgs.cs
- TypeUnloadedException.cs
- WindowsListViewItemStartMenu.cs
- CollectionDataContract.cs
- DoubleAverageAggregationOperator.cs
- SchemaElement.cs
- TableLayout.cs
- DataRowChangeEvent.cs
- FieldMetadata.cs
- DockPatternIdentifiers.cs
- WebPartDescriptionCollection.cs
- GcSettings.cs
- ApplicationServiceManager.cs
- CanonicalizationDriver.cs
- WsatTransactionInfo.cs
- StringAnimationBase.cs
- Rect3DConverter.cs
- AttributeCollection.cs
- Unit.cs
- XmlDictionary.cs
- ProviderMetadata.cs
- ErrorHandler.cs
- NativeMethodsOther.cs
- XPathNavigatorException.cs
- SupportsEventValidationAttribute.cs
- X509ChainElement.cs
- MarkupCompilePass2.cs
- LoginView.cs
- ChooseAction.cs
- SimpleApplicationHost.cs
- ZoneLinkButton.cs
- Resources.Designer.cs
- NonSerializedAttribute.cs
- WebPartsSection.cs
- ProviderSettings.cs
- DeleteStoreRequest.cs
- SHA384.cs
- Parameter.cs
- PerformanceCounterManager.cs
- ClientRuntimeConfig.cs
- XmlNodeList.cs
- NameObjectCollectionBase.cs
- Vector3DCollection.cs
- GifBitmapEncoder.cs
- SharedPerformanceCounter.cs
- ColorConvertedBitmapExtension.cs
- IncrementalReadDecoders.cs
- Stream.cs
- DirectoryObjectSecurity.cs
- WebBaseEventKeyComparer.cs
- DataGridRowClipboardEventArgs.cs
- Quaternion.cs
- OleDbTransaction.cs
- Nullable.cs
- PropertyValueChangedEvent.cs
- TypeConverterValueSerializer.cs
- TypeForwardedToAttribute.cs
- PolyBezierSegmentFigureLogic.cs
- LinearGradientBrush.cs
- TableParaClient.cs
- TreeNodeEventArgs.cs
- MouseWheelEventArgs.cs
- MenuAutomationPeer.cs
- SimpleApplicationHost.cs
- ClusterRegistryConfigurationProvider.cs
- Suspend.cs
- Rect3DConverter.cs
- SiteMap.cs
- AuthenticationModuleElementCollection.cs
- MessagePropertyAttribute.cs
- SchemaImporterExtensionElement.cs