Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Core / System / Linq / Parallel / QueryOperators / Inlined / InlinedAggregationOperatorEnumerator.cs / 1305376 / InlinedAggregationOperatorEnumerator.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== // =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ // // InlinedAggregationOperatorEnumerator.cs // //[....] // // =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- using System.Threading; namespace System.Linq.Parallel { //---------------------------------------------------------------------------------------- // Inlined aggregate operators for finding the min/max values for primitives (int, long, float, // double, decimal). Versions are also offered for the nullable primitives (int?, long?, float?, // double?, decimal?), which differ slightly in behavior: they return a null value for empty // streams, whereas the ordinary primitive versions throw. // //--------------------------------------------------------------------------------------- // Inlined average operators for primitives (int, long, float, double, decimal), and the // nullable variants. The difference between the nromal and nullable variety is that // nulls are skipped in tallying the count and sum for the average. // ////// A class with some shared implementation between all aggregation enumerators. /// ///internal abstract class InlinedAggregationOperatorEnumerator : QueryOperatorEnumerator { private int m_partitionIndex; // This partition's unique index. protected CancellationToken m_cancellationToken; //--------------------------------------------------------------------------------------- // Instantiates a new aggregation operator. // internal InlinedAggregationOperatorEnumerator(int partitionIndex, CancellationToken cancellationToken) { m_partitionIndex = partitionIndex; m_cancellationToken = cancellationToken; } //--------------------------------------------------------------------------------------- // Tallies up the sum of the underlying data source, walking the entire thing the first // time MoveNext is called on this object. There is a boilerplate variant used by callers, // and then one that is used for extensibility by subclasses. // internal sealed override bool MoveNext(ref TIntermediate currentElement, ref int currentKey) { if (MoveNextCore(ref currentElement)) { // A reduction's "index" is the same as its partition number. currentKey = m_partitionIndex; return true; } return false; } protected abstract bool MoveNextCore(ref TIntermediate currentElement); } } // 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
- SizeFConverter.cs
- WebResourceAttribute.cs
- ExternalDataExchangeClient.cs
- PointCollection.cs
- XDeferredAxisSource.cs
- MultipartContentParser.cs
- TableSectionStyle.cs
- DocumentOrderQuery.cs
- Msec.cs
- BindValidationContext.cs
- SqlConnectionHelper.cs
- ObjectNavigationPropertyMapping.cs
- ZipPackagePart.cs
- Source.cs
- DBConnectionString.cs
- StrokeCollectionConverter.cs
- DataGridAutoFormatDialog.cs
- OdbcParameter.cs
- SqlReferenceCollection.cs
- ErrorHandler.cs
- __TransparentProxy.cs
- UIElementCollection.cs
- ObjectConverter.cs
- NotifyCollectionChangedEventArgs.cs
- ApplicationSecurityInfo.cs
- ModifierKeysValueSerializer.cs
- ThreadStaticAttribute.cs
- BaseValidator.cs
- Semaphore.cs
- FilterQuery.cs
- XmlILIndex.cs
- ObjectItemCollection.cs
- EditorServiceContext.cs
- DataServiceHost.cs
- ReflectEventDescriptor.cs
- ValidationErrorEventArgs.cs
- ImageAttributes.cs
- StatusBarItem.cs
- MetadataCache.cs
- DrawListViewItemEventArgs.cs
- OrderedDictionary.cs
- GenericIdentity.cs
- ProtocolReflector.cs
- NonSerializedAttribute.cs
- TextMetrics.cs
- DataGridViewAutoSizeColumnModeEventArgs.cs
- StringFormat.cs
- TraceLevelStore.cs
- SQLBinary.cs
- LowerCaseStringConverter.cs
- FileNotFoundException.cs
- AssemblyAttributesGoHere.cs
- CheckoutException.cs
- DbConnectionPoolGroupProviderInfo.cs
- BoundPropertyEntry.cs
- Misc.cs
- TreeNodeCollection.cs
- HttpResponseHeader.cs
- RegexWriter.cs
- DurableInstance.cs
- PersonalizationAdministration.cs
- FieldMetadata.cs
- TreeBuilder.cs
- HttpHandlerAction.cs
- XmlTextAttribute.cs
- SqlBuilder.cs
- XmlSchemaException.cs
- InheritanceAttribute.cs
- SchemaHelper.cs
- BitmapInitialize.cs
- CodeDefaultValueExpression.cs
- Rule.cs
- PassportAuthenticationModule.cs
- HttpResponse.cs
- SpotLight.cs
- CacheMode.cs
- DependencyObjectProvider.cs
- AdornerPresentationContext.cs
- _ServiceNameStore.cs
- ViewGenResults.cs
- SynchronizationContext.cs
- DropSourceBehavior.cs
- figurelengthconverter.cs
- BulletChrome.cs
- HoistedLocals.cs
- ListBoxItemAutomationPeer.cs
- ArgIterator.cs
- BulletedListEventArgs.cs
- PathNode.cs
- MethodBuilderInstantiation.cs
- ControlDesigner.cs
- QuaternionKeyFrameCollection.cs
- SafeNativeMemoryHandle.cs
- DatagridviewDisplayedBandsData.cs
- NativeMethods.cs
- JumpItem.cs
- HostProtectionPermission.cs
- SafePEFileHandle.cs
- COM2AboutBoxPropertyDescriptor.cs
- RNGCryptoServiceProvider.cs