Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Data / System / Data / Odbc / OdbcEnvironment.cs / 1305376 / 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.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- Overlapped.cs
- AnonymousIdentificationModule.cs
- SymDocumentType.cs
- IgnoreFileBuildProvider.cs
- _UncName.cs
- ProfileSettings.cs
- UIntPtr.cs
- X509CertificateInitiatorClientCredential.cs
- Converter.cs
- RawContentTypeMapper.cs
- httpapplicationstate.cs
- ImageAttributes.cs
- _SslStream.cs
- sqlmetadatafactory.cs
- HtmlHead.cs
- GenericTextProperties.cs
- PathFigureCollectionConverter.cs
- FunctionMappingTranslator.cs
- ListViewItemEventArgs.cs
- TextBoxDesigner.cs
- FlowNode.cs
- DropDownList.cs
- ReferenceService.cs
- Queue.cs
- ZoneIdentityPermission.cs
- BitFlagsGenerator.cs
- AsyncOperation.cs
- CngProperty.cs
- PagerSettings.cs
- WebPartEventArgs.cs
- SecurityDocument.cs
- Bezier.cs
- PagerStyle.cs
- SurrogateDataContract.cs
- ToolStripSettings.cs
- AuthenticationConfig.cs
- ConstraintStruct.cs
- PackagePart.cs
- DefaultBindingPropertyAttribute.cs
- ConfigXmlAttribute.cs
- UIElement3D.cs
- EmptyEnumerator.cs
- DelegatingConfigHost.cs
- RemotingConfigParser.cs
- Internal.cs
- ReaderWriterLockSlim.cs
- TableHeaderCell.cs
- HttpProtocolReflector.cs
- SHA512.cs
- SelectionEditingBehavior.cs
- BitmapImage.cs
- InfoCardTrace.cs
- ColumnReorderedEventArgs.cs
- WrappedIUnknown.cs
- Repeater.cs
- CodeDelegateInvokeExpression.cs
- CommandPlan.cs
- Avt.cs
- HttpProcessUtility.cs
- FixedSchema.cs
- AlignmentXValidation.cs
- ScrollContentPresenter.cs
- WebPartManagerInternals.cs
- Page.cs
- EmptyReadOnlyDictionaryInternal.cs
- XmlByteStreamReader.cs
- CommandDesigner.cs
- EntityDataSourceWrapperCollection.cs
- DataRowView.cs
- WebRequestModuleElement.cs
- ResolveCriteria11.cs
- DataSpaceManager.cs
- ToolStripDropDownClosingEventArgs.cs
- AddInAttribute.cs
- VerticalAlignConverter.cs
- sitestring.cs
- CommandDesigner.cs
- MailAddressCollection.cs
- DeviceContext2.cs
- TextTreeInsertElementUndoUnit.cs
- WriteStateInfoBase.cs
- Classification.cs
- DocumentScope.cs
- AppDomainManager.cs
- ObjectListComponentEditor.cs
- SuppressMergeCheckAttribute.cs
- TextElementEnumerator.cs
- DurableOperationContext.cs
- RotationValidation.cs
- ResourceReader.cs
- TextDecorationCollection.cs
- WizardStepBase.cs
- CodeGenerator.cs
- PageStatePersister.cs
- ExecutionContext.cs
- Classification.cs
- DecoderExceptionFallback.cs
- Attributes.cs
- ParentUndoUnit.cs
- Substitution.cs