Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / 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
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- EndOfStreamException.cs
- XPathSingletonIterator.cs
- ArgumentNullException.cs
- ZipFileInfo.cs
- FormatConvertedBitmap.cs
- DateRangeEvent.cs
- IndependentAnimationStorage.cs
- DynamicMethod.cs
- EntityDataSourceDesignerHelper.cs
- EntityDataSourceContextCreatedEventArgs.cs
- DataGridViewRow.cs
- XmlSchemaParticle.cs
- RemotingConfiguration.cs
- TaskHelper.cs
- EditorZone.cs
- SoapCommonClasses.cs
- NotifyInputEventArgs.cs
- TextFragmentEngine.cs
- ProviderConnectionPointCollection.cs
- WindowsListBox.cs
- StyleSelector.cs
- DataPagerFieldItem.cs
- FormsAuthenticationEventArgs.cs
- ComponentResourceKeyConverter.cs
- path.cs
- Exceptions.cs
- TransactionChannel.cs
- MailDefinition.cs
- GifBitmapDecoder.cs
- MexTcpBindingCollectionElement.cs
- ForceCopyBuildProvider.cs
- NavigationFailedEventArgs.cs
- SamlConditions.cs
- XsltCompileContext.cs
- SettingsPropertyValue.cs
- ProfileGroupSettings.cs
- ReferencedCollectionType.cs
- DataSourceCacheDurationConverter.cs
- ProviderSettings.cs
- ConsumerConnectionPointCollection.cs
- OdbcConnectionFactory.cs
- FixedElement.cs
- ProxyHelper.cs
- ListDictionaryInternal.cs
- datacache.cs
- FillBehavior.cs
- PlatformNotSupportedException.cs
- IPEndPointCollection.cs
- JapaneseCalendar.cs
- LinqDataSourceValidationException.cs
- SortedList.cs
- LowerCaseStringConverter.cs
- StatusBarDrawItemEvent.cs
- CssStyleCollection.cs
- CompModHelpers.cs
- ZipIOZip64EndOfCentralDirectoryBlock.cs
- DetailsViewModeEventArgs.cs
- CustomTrackingQuery.cs
- XmlElementCollection.cs
- DeferrableContentConverter.cs
- DataGridComponentEditor.cs
- MediaContext.cs
- StreamedWorkflowDefinitionContext.cs
- DataViewListener.cs
- TextTreeDeleteContentUndoUnit.cs
- ToolStripCollectionEditor.cs
- ToolStripOverflowButton.cs
- UserMapPath.cs
- TypeToArgumentTypeConverter.cs
- SystemIPInterfaceProperties.cs
- ToolStripItemTextRenderEventArgs.cs
- MessageSecurityOverHttpElement.cs
- HandledMouseEvent.cs
- LiteralDesigner.cs
- StringInfo.cs
- Thumb.cs
- AsymmetricKeyExchangeDeformatter.cs
- FileStream.cs
- SvcMapFileSerializer.cs
- _Win32.cs
- QilInvoke.cs
- itemelement.cs
- EmptyControlCollection.cs
- State.cs
- TemplateDefinition.cs
- ConnectionConsumerAttribute.cs
- ImageAnimator.cs
- LayoutManager.cs
- SqlBulkCopy.cs
- PathFigureCollection.cs
- ChtmlTextBoxAdapter.cs
- MSAANativeProvider.cs
- InlineObject.cs
- updateconfighost.cs
- CultureData.cs
- BitmapMetadataEnumerator.cs
- PackageRelationshipCollection.cs
- WebReferenceOptions.cs
- ExtensionQuery.cs
- WithParamAction.cs