Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / fx / src / Data / System / Data / Odbc / OdbcEnvironment.cs / 1 / OdbcEnvironment.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //----------------------------------------------------------------------------- using System; using System.Data; using System.Data.Common; using System.Threading; namespace System.Data.Odbc { sealed internal class OdbcEnvironment { static private object _globalEnvironmentHandle; static private object _globalEnvironmentHandleLock = new object(); private OdbcEnvironment () {} // default const. static internal OdbcEnvironmentHandle GetGlobalEnvironmentHandle() { OdbcEnvironmentHandle globalEnvironmentHandle = _globalEnvironmentHandle as OdbcEnvironmentHandle; if(null == globalEnvironmentHandle) { ADP.CheckVersionMDAC(true); lock(_globalEnvironmentHandleLock) { globalEnvironmentHandle = _globalEnvironmentHandle as OdbcEnvironmentHandle; if(null == globalEnvironmentHandle) { globalEnvironmentHandle = new OdbcEnvironmentHandle(); _globalEnvironmentHandle = globalEnvironmentHandle; } } } return globalEnvironmentHandle; } static internal void ReleaseObjectPool() { object globalEnvironmentHandle = Interlocked.Exchange(ref _globalEnvironmentHandle, null); if(null != globalEnvironmentHandle) { (globalEnvironmentHandle as OdbcEnvironmentHandle).Dispose(); // internally refcounted so will happen correctly } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //----------------------------------------------------------------------------- using System; using System.Data; using System.Data.Common; using System.Threading; namespace System.Data.Odbc { sealed internal class OdbcEnvironment { static private object _globalEnvironmentHandle; static private object _globalEnvironmentHandleLock = new object(); private OdbcEnvironment () {} // default const. static internal OdbcEnvironmentHandle GetGlobalEnvironmentHandle() { OdbcEnvironmentHandle globalEnvironmentHandle = _globalEnvironmentHandle as OdbcEnvironmentHandle; if(null == globalEnvironmentHandle) { ADP.CheckVersionMDAC(true); lock(_globalEnvironmentHandleLock) { globalEnvironmentHandle = _globalEnvironmentHandle as OdbcEnvironmentHandle; if(null == globalEnvironmentHandle) { globalEnvironmentHandle = new OdbcEnvironmentHandle(); _globalEnvironmentHandle = globalEnvironmentHandle; } } } return globalEnvironmentHandle; } static internal void ReleaseObjectPool() { object globalEnvironmentHandle = Interlocked.Exchange(ref _globalEnvironmentHandle, null); if(null != globalEnvironmentHandle) { (globalEnvironmentHandle as OdbcEnvironmentHandle).Dispose(); // internally refcounted so will happen correctly } } } } // 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
- FixedSOMTableCell.cs
- DbProviderManifest.cs
- PointLightBase.cs
- CodeThrowExceptionStatement.cs
- XhtmlConformanceSection.cs
- DataServiceBehavior.cs
- StsCommunicationException.cs
- LicenseContext.cs
- WebPartVerb.cs
- StrongNamePublicKeyBlob.cs
- EventHandlers.cs
- SecureStringHasher.cs
- IPEndPointCollection.cs
- CapabilitiesRule.cs
- TabRenderer.cs
- RawUIStateInputReport.cs
- EncoderNLS.cs
- SqlXml.cs
- RotateTransform.cs
- EdmItemError.cs
- DotExpr.cs
- XamlRtfConverter.cs
- XslCompiledTransform.cs
- Encoder.cs
- ConnectionManagementSection.cs
- Int64Storage.cs
- Condition.cs
- OpenFileDialog.cs
- MemoryPressure.cs
- DecoderNLS.cs
- CodeTypeDeclarationCollection.cs
- InputReportEventArgs.cs
- EventDescriptor.cs
- CodeVariableReferenceExpression.cs
- GridViewRow.cs
- UpdateCommandGenerator.cs
- KnownIds.cs
- TagPrefixCollection.cs
- FixedBufferAttribute.cs
- DataServiceBehavior.cs
- JsonServiceDocumentSerializer.cs
- FlowLayoutSettings.cs
- WorkflowIdleBehavior.cs
- GradientStopCollection.cs
- DataControlCommands.cs
- DBNull.cs
- CompiledXpathExpr.cs
- FrameworkContentElement.cs
- Keyboard.cs
- AppDomainEvidenceFactory.cs
- SpellerError.cs
- GCHandleCookieTable.cs
- DbConnectionPoolGroup.cs
- SqlPersonalizationProvider.cs
- EFColumnProvider.cs
- WebPartEventArgs.cs
- Pair.cs
- EventLogPermissionEntry.cs
- NeedSkipTokenVisitor.cs
- SQLBytes.cs
- RelatedImageListAttribute.cs
- ExtentCqlBlock.cs
- RenderDataDrawingContext.cs
- Tracking.cs
- Convert.cs
- CodeSubDirectory.cs
- SafeNativeMethods.cs
- ProviderIncompatibleException.cs
- controlskin.cs
- FontStretch.cs
- ScrollableControlDesigner.cs
- InstanceNotReadyException.cs
- FrameworkElementFactory.cs
- MainMenu.cs
- EmbeddedMailObject.cs
- SoapExtension.cs
- DbgUtil.cs
- QueryStringParameter.cs
- CodeCompileUnit.cs
- DateTimeParse.cs
- SafeMILHandle.cs
- EndGetFileNameFromUserRequest.cs
- ImageList.cs
- FixedSOMContainer.cs
- EncoderParameters.cs
- ThicknessAnimationBase.cs
- TypeUnloadedException.cs
- ViewBase.cs
- WindowsToolbar.cs
- IsolatedStorageFilePermission.cs
- SystemUnicastIPAddressInformation.cs
- DBConnection.cs
- ByteAnimationBase.cs
- ProtocolsConfiguration.cs
- CriticalFileToken.cs
- LogAppendAsyncResult.cs
- StringExpressionSet.cs
- XmlElement.cs
- ETagAttribute.cs
- TemplatedAdorner.cs