Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Data / System / Data / Common / SafeNativeMethods.cs / 1 / SafeNativeMethods.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //[....] //----------------------------------------------------------------------------- using System; using System.Runtime.CompilerServices; using System.Runtime.InteropServices; using System.Security; using System.Security.Permissions; using System.Text; using System.Threading; using System.Runtime.ConstrainedExecution; namespace System.Data.Common { [SuppressUnmanagedCodeSecurityAttribute()] internal static class SafeNativeMethods { [DllImport(ExternDll.Ole32, SetLastError=false)] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)] static internal extern IntPtr CoTaskMemAlloc(IntPtr cb); [DllImport(ExternDll.Ole32, SetLastError=false)] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] static internal extern void CoTaskMemFree(IntPtr handle); [DllImport(ExternDll.Kernel32, CharSet=CharSet.Unicode, PreserveSig=true)] static internal extern int GetUserDefaultLCID(); #if !ORACLE [DllImport(ExternDll.Kernel32, PreserveSig=true)] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] static internal extern void ZeroMemory(IntPtr dest, IntPtr length); #endif /*[DllImport(ExternDll.Kernel32)] static internal extern IntPtr InterlockedCompareExchange( IntPtr Destination, // destination address IntPtr Exchange, // exchange value IntPtr Comperand // value to compare );*/ //// Using the int versions of the Increment() and Decrement() methods is correct. // Please check \fx\src\Data\System\Data\Odbc\OdbcHandle.cs for the memory layout. // //// The following casting operations require these three methods to be unsafe. This is // a workaround for this issue to meet the M1 exit criteria. We need to revisit this in M2. [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)] static internal unsafe IntPtr InterlockedExchangePointer( IntPtr lpAddress, IntPtr lpValue) { IntPtr previousPtr; IntPtr actualPtr = *(IntPtr *)lpAddress.ToPointer(); do { previousPtr = actualPtr; actualPtr = Interlocked.CompareExchange(ref *(IntPtr *)lpAddress.ToPointer(), lpValue, previousPtr); } while (actualPtr != previousPtr); return actualPtr; } // http://msdn.microsoft.com/library/default.asp?url=/library/en-us/sysinfo/base/getcomputernameex.asp [DllImport(ExternDll.Kernel32, CharSet = CharSet.Unicode, EntryPoint="GetComputerNameExW", SetLastError=true)] static internal extern int GetComputerNameEx(int nameType, StringBuilder nameBuffer, ref int bufferSize); [DllImport(ExternDll.Kernel32, CharSet=System.Runtime.InteropServices.CharSet.Auto)] static internal extern int GetCurrentProcessId(); [DllImport(ExternDll.Kernel32, CharSet=CharSet.Auto, BestFitMapping=false, ThrowOnUnmappableChar=true)] // [DllImport(ExternDll.Kernel32, CharSet=CharSet.Auto)] static internal extern IntPtr GetModuleHandle([MarshalAs(UnmanagedType.LPTStr), In] string moduleName/*lpctstr*/); [DllImport(ExternDll.Kernel32, CharSet=CharSet.Ansi, BestFitMapping=false, ThrowOnUnmappableChar=true)] // [DllImport(ExternDll.Kernel32, CharSet=CharSet.Ansi)] static internal extern IntPtr GetProcAddress(IntPtr HModule, [MarshalAs(UnmanagedType.LPStr), In] string funcName/*lpcstr*/); [DllImport(ExternDll.Kernel32)] internal static extern void GetSystemTimeAsFileTime(out long lpSystemTimeAsFileTime); [DllImport(ExternDll.Kernel32, SetLastError=true)] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)] static internal extern IntPtr LocalAlloc(int flags, IntPtr countOfBytes); [DllImport(ExternDll.Kernel32, SetLastError=true)] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] static internal extern IntPtr LocalFree(IntPtr handle); [DllImport(ExternDll.Oleaut32, CharSet=CharSet.Unicode)] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)] internal static extern IntPtr SysAllocStringLen(String src, int len); // BSTR [DllImport(ExternDll.Oleaut32)] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] internal static extern void SysFreeString(IntPtr bstr); // only using this to clear existing error info with null [DllImport(ExternDll.Oleaut32, CharSet=CharSet.Unicode, PreserveSig=false)] static private extern void SetErrorInfo(Int32 dwReserved, IntPtr pIErrorInfo); [DllImport(ExternDll.Kernel32, SetLastError=true)] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)] static internal extern int ReleaseSemaphore(IntPtr handle, int releaseCount, IntPtr previousCount); [DllImport(ExternDll.Kernel32, SetLastError=true)] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)] static internal extern int WaitForMultipleObjectsEx(uint nCount, IntPtr lpHandles, bool bWaitAll, uint dwMilliseconds, bool bAlertable); [DllImport(ExternDll.Kernel32/*, SetLastError=true*/)] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)] static internal extern int WaitForSingleObjectEx(IntPtr lpHandles, uint dwMilliseconds, bool bAlertable); [DllImport(ExternDll.Ole32, PreserveSig=false)] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] static internal extern void PropVariantClear(IntPtr pObject); [DllImport(ExternDll.Oleaut32, PreserveSig=false)] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] static internal extern void VariantClear(IntPtr pObject); sealed internal class Wrapper { private Wrapper() { } static internal void ClearErrorInfo() { // MDAC 68199 SafeNativeMethods.SetErrorInfo(0, ADP.PtrZero); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- CustomPeerResolverService.cs
- filewebrequest.cs
- SystemIPGlobalStatistics.cs
- GradientStop.cs
- MetadataArtifactLoaderXmlReaderWrapper.cs
- MetadataPropertyCollection.cs
- OutOfProcStateClientManager.cs
- FacetDescription.cs
- VisualBasicValue.cs
- ButtonBase.cs
- Touch.cs
- SuppressIldasmAttribute.cs
- MsmqBindingFilter.cs
- TextEditorTyping.cs
- InstanceKeyNotReadyException.cs
- RadioButtonStandardAdapter.cs
- MessageQueue.cs
- EdmRelationshipRoleAttribute.cs
- Section.cs
- CommandEventArgs.cs
- DesignTimeSiteMapProvider.cs
- NavigatorOutput.cs
- EmptyEnumerable.cs
- CompressionTransform.cs
- SessionEndingCancelEventArgs.cs
- BoundsDrawingContextWalker.cs
- PathGeometry.cs
- Number.cs
- StorageConditionPropertyMapping.cs
- PartManifestEntry.cs
- ConfigurationManagerInternalFactory.cs
- DataGridViewElement.cs
- PrinterUnitConvert.cs
- Span.cs
- CustomErrorsSectionWrapper.cs
- TabItem.cs
- ProgressBarBrushConverter.cs
- Fx.cs
- TextElementEnumerator.cs
- FrameAutomationPeer.cs
- HttpCachePolicy.cs
- SystemNetHelpers.cs
- WebBrowserDocumentCompletedEventHandler.cs
- EnumerationRangeValidationUtil.cs
- QueryRewriter.cs
- WebPartDisplayModeCancelEventArgs.cs
- WebPartConnectionsCancelVerb.cs
- XmlText.cs
- ListViewItemEventArgs.cs
- TemplateControlCodeDomTreeGenerator.cs
- ChannelServices.cs
- WebBrowserSiteBase.cs
- TransportDefaults.cs
- CharAnimationUsingKeyFrames.cs
- SimpleBitVector32.cs
- LogRecordSequence.cs
- TransactedReceiveScope.cs
- RegexTree.cs
- DbConnectionHelper.cs
- FixedFindEngine.cs
- HtmlAnchor.cs
- SchemaMerger.cs
- InvokeMethodDesigner.xaml.cs
- WindowsTab.cs
- DataGridViewCellFormattingEventArgs.cs
- CodeLabeledStatement.cs
- DynamicILGenerator.cs
- TextSelectionProcessor.cs
- PathGeometry.cs
- DiscoveryDocumentLinksPattern.cs
- Transform3DGroup.cs
- _SafeNetHandles.cs
- QuaternionAnimationBase.cs
- LocalizationComments.cs
- BigInt.cs
- _ShellExpression.cs
- XmlDeclaration.cs
- ScrollChangedEventArgs.cs
- HostExecutionContextManager.cs
- InstancePersistence.cs
- FrameworkElementFactoryMarkupObject.cs
- XPathQueryGenerator.cs
- TableTextElementCollectionInternal.cs
- SortDescriptionCollection.cs
- TableLayoutStyleCollection.cs
- ObservableDictionary.cs
- StringAttributeCollection.cs
- EventPrivateKey.cs
- SpellerError.cs
- BinHexDecoder.cs
- DataTablePropertyDescriptor.cs
- ObjectDataSourceDisposingEventArgs.cs
- BypassElement.cs
- IncomingWebResponseContext.cs
- ModelEditingScope.cs
- ToolStripArrowRenderEventArgs.cs
- PropertyInfoSet.cs
- MULTI_QI.cs
- Rect3DConverter.cs
- CodeCommentStatement.cs