Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / clr / src / BCL / System / _LocalDataStore.cs / 1 / _LocalDataStore.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== /*============================================================================== ** ** Class: LocalDataStore ** ** ** Purpose: Class that stores local data. This class is used in cooperation ** with the _LocalDataStoreMgr class. ** ** =============================================================================*/ namespace System { using System; using System.Threading; using System.Runtime.CompilerServices; // This class will not be marked serializable internal class LocalDataStore { /*========================================================================= ** DON'T CHANGE THESE UNLESS YOU MODIFY LocalDataStoreBaseObject in vm\object.h =========================================================================*/ private Object[] m_DataTable; private LocalDataStoreMgr m_Manager; #pragma warning disable 414 // Field is not used from managed. private int DONT_USE_InternalStore = 0; // pointer #pragma warning restore 414 /*========================================================================= ** Initialize the data store. =========================================================================*/ public LocalDataStore(LocalDataStoreMgr mgr, int InitialCapacity) { if (null == mgr) throw new ArgumentNullException("mgr"); // Store the manager of the local data store. m_Manager = mgr; // Allocate the array that will contain the data. m_DataTable = new Object[InitialCapacity]; } /*========================================================================= ** Retrieves the value from the specified slot. =========================================================================*/ public Object GetData(LocalDataStoreSlot slot) { Object o = null; // Validate the slot. m_Manager.ValidateSlot(slot); // Cache the slot index to avoid synchronization issues. int slotIdx = slot.Slot; if (slotIdx >= 0) { // Delay expansion of m_DataTable if we can if (slotIdx >= m_DataTable.Length) return null; // Retrieve the data from the given slot. o = m_DataTable[slotIdx]; } // Check if the slot has become invalid. if (!slot.IsValid()) throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_SlotHasBeenFreed")); return o; } /*========================================================================== ** Sets the data in the specified slot. =========================================================================*/ public void SetData(LocalDataStoreSlot slot, Object data) { // Validate the slot. m_Manager.ValidateSlot(slot); // I can't think of a way to avoid the ---- described in the // LocalDataStoreSlot finalizer method without a lock. bool tookLock = false; RuntimeHelpers.PrepareConstrainedRegions(); try { Monitor.ReliableEnter(m_Manager, ref tookLock); if (!slot.IsValid()) throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_SlotHasBeenFreed")); // Do the actual set operation. SetDataInternal(slot.Slot, data, true /*bAlloc*/ ); } finally { if (tookLock) Monitor.Exit(m_Manager); } } /*========================================================================= ** This method does the actual work of setting the data. =========================================================================*/ internal void SetDataInternal(int slot, Object data, bool bAlloc) { // We try to delay allocate the dataTable (in cases like the manager clearing a // just-freed slot in all stores if (slot >= m_DataTable.Length) { if (!bAlloc) return; SetCapacity(m_Manager.GetSlotTableLength()); } // Set the data on the given slot. m_DataTable[slot] = data; } /*========================================================================== ** Method used to set the capacity of the local data store. =========================================================================*/ private void SetCapacity(int capacity) { // Validate that the specified capacity is larger than the current one. if (capacity < m_DataTable.Length) throw new ArgumentException(Environment.GetResourceString("Argument_ALSInvalidCapacity")); // Allocate the new data table. Object[] NewDataTable = new Object[capacity]; // Copy all the objects into the new table. Array.Copy(m_DataTable, NewDataTable, m_DataTable.Length); // Save the new table. m_DataTable = NewDataTable; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== /*============================================================================== ** ** Class: LocalDataStore ** ** ** Purpose: Class that stores local data. This class is used in cooperation ** with the _LocalDataStoreMgr class. ** ** =============================================================================*/ namespace System { using System; using System.Threading; using System.Runtime.CompilerServices; // This class will not be marked serializable internal class LocalDataStore { /*========================================================================= ** DON'T CHANGE THESE UNLESS YOU MODIFY LocalDataStoreBaseObject in vm\object.h =========================================================================*/ private Object[] m_DataTable; private LocalDataStoreMgr m_Manager; #pragma warning disable 414 // Field is not used from managed. private int DONT_USE_InternalStore = 0; // pointer #pragma warning restore 414 /*========================================================================= ** Initialize the data store. =========================================================================*/ public LocalDataStore(LocalDataStoreMgr mgr, int InitialCapacity) { if (null == mgr) throw new ArgumentNullException("mgr"); // Store the manager of the local data store. m_Manager = mgr; // Allocate the array that will contain the data. m_DataTable = new Object[InitialCapacity]; } /*========================================================================= ** Retrieves the value from the specified slot. =========================================================================*/ public Object GetData(LocalDataStoreSlot slot) { Object o = null; // Validate the slot. m_Manager.ValidateSlot(slot); // Cache the slot index to avoid synchronization issues. int slotIdx = slot.Slot; if (slotIdx >= 0) { // Delay expansion of m_DataTable if we can if (slotIdx >= m_DataTable.Length) return null; // Retrieve the data from the given slot. o = m_DataTable[slotIdx]; } // Check if the slot has become invalid. if (!slot.IsValid()) throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_SlotHasBeenFreed")); return o; } /*========================================================================== ** Sets the data in the specified slot. =========================================================================*/ public void SetData(LocalDataStoreSlot slot, Object data) { // Validate the slot. m_Manager.ValidateSlot(slot); // I can't think of a way to avoid the ---- described in the // LocalDataStoreSlot finalizer method without a lock. bool tookLock = false; RuntimeHelpers.PrepareConstrainedRegions(); try { Monitor.ReliableEnter(m_Manager, ref tookLock); if (!slot.IsValid()) throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_SlotHasBeenFreed")); // Do the actual set operation. SetDataInternal(slot.Slot, data, true /*bAlloc*/ ); } finally { if (tookLock) Monitor.Exit(m_Manager); } } /*========================================================================= ** This method does the actual work of setting the data. =========================================================================*/ internal void SetDataInternal(int slot, Object data, bool bAlloc) { // We try to delay allocate the dataTable (in cases like the manager clearing a // just-freed slot in all stores if (slot >= m_DataTable.Length) { if (!bAlloc) return; SetCapacity(m_Manager.GetSlotTableLength()); } // Set the data on the given slot. m_DataTable[slot] = data; } /*========================================================================== ** Method used to set the capacity of the local data store. =========================================================================*/ private void SetCapacity(int capacity) { // Validate that the specified capacity is larger than the current one. if (capacity < m_DataTable.Length) throw new ArgumentException(Environment.GetResourceString("Argument_ALSInvalidCapacity")); // Allocate the new data table. Object[] NewDataTable = new Object[capacity]; // Copy all the objects into the new table. Array.Copy(m_DataTable, NewDataTable, m_DataTable.Length); // Save the new table. m_DataTable = NewDataTable; } } } // 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
- SafeCryptoHandles.cs
- UnsafeNativeMethods.cs
- EntityKeyElement.cs
- ZeroOpNode.cs
- DefaultHttpHandler.cs
- ObjRef.cs
- OracleNumber.cs
- FlowDocument.cs
- WebZoneDesigner.cs
- MarkupExtensionParser.cs
- ObjectViewEntityCollectionData.cs
- DesignerDataRelationship.cs
- BaseValidator.cs
- ExceptionUtil.cs
- CompoundFileReference.cs
- HttpHeaderCollection.cs
- PathFigureCollectionValueSerializer.cs
- InternalException.cs
- PointLightBase.cs
- WebPartVerbCollection.cs
- ProcessModule.cs
- Vector3DCollectionConverter.cs
- RealizationContext.cs
- ConstraintCollection.cs
- OdbcEnvironment.cs
- NamespaceEmitter.cs
- WebPartConnectVerb.cs
- RtfToXamlReader.cs
- OdbcConnectionStringbuilder.cs
- TagNameToTypeMapper.cs
- AggregationMinMaxHelpers.cs
- IntSecurity.cs
- Panel.cs
- InputScopeManager.cs
- Internal.cs
- WebPartAuthorizationEventArgs.cs
- ToolStripSeparator.cs
- VoiceObjectToken.cs
- DataControlField.cs
- SmtpCommands.cs
- ConnectionStringSettings.cs
- Buffer.cs
- PointConverter.cs
- ArgumentOutOfRangeException.cs
- XmlWriterSettings.cs
- ViewStateModeByIdAttribute.cs
- FindSimilarActivitiesVerb.cs
- CollectionContainer.cs
- XmlILStorageConverter.cs
- ArrangedElement.cs
- RSACryptoServiceProvider.cs
- Bold.cs
- ProtocolException.cs
- ExpressionEditorSheet.cs
- EventPropertyMap.cs
- CollectionsUtil.cs
- KeyedCollection.cs
- ResourceWriter.cs
- ProjectionCamera.cs
- XmlSchemaComplexContent.cs
- DataGridViewCellParsingEventArgs.cs
- AdditionalEntityFunctions.cs
- XsltQilFactory.cs
- TextEditorLists.cs
- MessageQueuePermission.cs
- HttpChannelBindingToken.cs
- XmlUnspecifiedAttribute.cs
- xmlformatgeneratorstatics.cs
- HttpServerVarsCollection.cs
- RegexGroupCollection.cs
- FlowDocumentReaderAutomationPeer.cs
- PhysicalOps.cs
- HighlightComponent.cs
- SettingsAttributes.cs
- GroupBoxDesigner.cs
- CorrelationQueryBehavior.cs
- ComPlusTraceRecord.cs
- DataKey.cs
- SoapTypeAttribute.cs
- JpegBitmapEncoder.cs
- OpacityConverter.cs
- HostVisual.cs
- BridgeDataReader.cs
- EmbeddedMailObject.cs
- ColorTransform.cs
- _NegoState.cs
- HttpInputStream.cs
- SelectionChangedEventArgs.cs
- OutputCacheSection.cs
- ReadOnlyCollection.cs
- EUCJPEncoding.cs
- RequiredAttributeAttribute.cs
- WebPartsPersonalizationAuthorization.cs
- RuntimeHandles.cs
- DockPanel.cs
- InheritedPropertyChangedEventArgs.cs
- HealthMonitoringSectionHelper.cs
- _SpnDictionary.cs
- TableLayoutColumnStyleCollection.cs
- PageSettings.cs