Code:
/ FX-1434 / FX-1434 / 1.0 / 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
- CultureInfo.cs
- Font.cs
- WebBodyFormatMessageProperty.cs
- Version.cs
- Event.cs
- FrameworkPropertyMetadata.cs
- followingquery.cs
- SynchronizingStream.cs
- sqlnorm.cs
- DataList.cs
- OpCodes.cs
- CurrentChangedEventManager.cs
- DiscoveryExceptionDictionary.cs
- ValidationSummary.cs
- WindowsAuthenticationModule.cs
- InvalidContentTypeException.cs
- RC2CryptoServiceProvider.cs
- ObjectDataSourceMethodEventArgs.cs
- CryptographicAttribute.cs
- HttpHandlerActionCollection.cs
- DetailsViewDeleteEventArgs.cs
- EventMemberCodeDomSerializer.cs
- PingReply.cs
- QueueSurrogate.cs
- Substitution.cs
- TouchEventArgs.cs
- SectionRecord.cs
- Dump.cs
- __TransparentProxy.cs
- CqlParser.cs
- StrongNameKeyPair.cs
- InvokeBinder.cs
- DelegateSerializationHolder.cs
- ContextMenu.cs
- EntityStoreSchemaGenerator.cs
- StoreAnnotationsMap.cs
- UnhandledExceptionEventArgs.cs
- Block.cs
- XPathArrayIterator.cs
- DataGridViewMethods.cs
- ComplexObject.cs
- TypographyProperties.cs
- DataServiceProcessingPipeline.cs
- DataGridViewIntLinkedList.cs
- BindableTemplateBuilder.cs
- FormsAuthenticationEventArgs.cs
- SqlFlattener.cs
- SimpleApplicationHost.cs
- CodeMemberProperty.cs
- ExtenderProviderService.cs
- LiteralControl.cs
- SafeHandles.cs
- XmlAttributeProperties.cs
- Environment.cs
- AttributeEmitter.cs
- MSG.cs
- TypeSource.cs
- DatagridviewDisplayedBandsData.cs
- TypeBrowserDialog.cs
- AnchorEditor.cs
- ToolStripItemImageRenderEventArgs.cs
- ClassGenerator.cs
- Stylesheet.cs
- SerializationSectionGroup.cs
- HttpRequestTraceRecord.cs
- BaseTemplateCodeDomTreeGenerator.cs
- RawTextInputReport.cs
- RefreshEventArgs.cs
- _BasicClient.cs
- EditorAttribute.cs
- WorkflowTimerService.cs
- SQLInt32Storage.cs
- NullableFloatSumAggregationOperator.cs
- WindowsUserNameSecurityTokenAuthenticator.cs
- BitmapSourceSafeMILHandle.cs
- ControlDesigner.cs
- ToolStripOverflowButton.cs
- ByteStreamGeometryContext.cs
- UnaryQueryOperator.cs
- CircleHotSpot.cs
- __Filters.cs
- StorageRoot.cs
- Object.cs
- RectConverter.cs
- ThousandthOfEmRealPoints.cs
- XmlSchemaSimpleType.cs
- InstalledFontCollection.cs
- CfgRule.cs
- FormViewInsertedEventArgs.cs
- TaiwanCalendar.cs
- Environment.cs
- TargetPerspective.cs
- ClientTargetCollection.cs
- CodeDirectionExpression.cs
- ButtonRenderer.cs
- ResourceSet.cs
- InputLanguageManager.cs
- UnknownBitmapEncoder.cs
- DbReferenceCollection.cs
- WebRequestModulesSection.cs