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
- PersonalizableTypeEntry.cs
- ContentTypeSettingClientMessageFormatter.cs
- FamilyMap.cs
- BoundsDrawingContextWalker.cs
- BidPrivateBase.cs
- DynamicActionMessageFilter.cs
- DataSetSchema.cs
- Invariant.cs
- DrawingContextWalker.cs
- UnaryNode.cs
- Context.cs
- EnvelopedSignatureTransform.cs
- DataGridViewRowHeaderCell.cs
- GuidelineCollection.cs
- NestPullup.cs
- HMACMD5.cs
- XsdValidatingReader.cs
- SpecularMaterial.cs
- DtcInterfaces.cs
- LZCodec.cs
- ErrorWrapper.cs
- HandledEventArgs.cs
- BinaryObjectWriter.cs
- Monitor.cs
- InheritedPropertyChangedEventArgs.cs
- TextFormatterImp.cs
- CodeIterationStatement.cs
- ArithmeticException.cs
- SamlDoNotCacheCondition.cs
- Vector3DAnimation.cs
- PerformanceCounterPermissionAttribute.cs
- httpstaticobjectscollection.cs
- DeadCharTextComposition.cs
- DataControlFieldHeaderCell.cs
- Keyboard.cs
- Line.cs
- MaterialGroup.cs
- HtmlWindow.cs
- CodeBinaryOperatorExpression.cs
- GridViewRowEventArgs.cs
- MouseActionConverter.cs
- ElementNotEnabledException.cs
- DefaultValueTypeConverter.cs
- StrokeSerializer.cs
- StringExpressionSet.cs
- ClearTypeHintValidation.cs
- GridViewUpdateEventArgs.cs
- RuntimeArgumentHandle.cs
- ZipFileInfo.cs
- GregorianCalendar.cs
- OrderByQueryOptionExpression.cs
- XmlChildNodes.cs
- SignedXmlDebugLog.cs
- CmsInterop.cs
- IsolatedStorageException.cs
- ColorMap.cs
- StringToken.cs
- TimeSpanMinutesConverter.cs
- FormsAuthenticationEventArgs.cs
- DisplayInformation.cs
- PointAnimationBase.cs
- XmlReader.cs
- ProxyManager.cs
- GridEntry.cs
- TextCharacters.cs
- KeyValueConfigurationElement.cs
- ThreadAttributes.cs
- XmlAnyElementAttributes.cs
- BaseProcessor.cs
- CompositeKey.cs
- MbpInfo.cs
- LightweightCodeGenerator.cs
- BasicDesignerLoader.cs
- PropertyNames.cs
- CompilationSection.cs
- SimpleType.cs
- AssemblyHash.cs
- PackageRelationshipSelector.cs
- DelegatingTypeDescriptionProvider.cs
- StorageInfo.cs
- messageonlyhwndwrapper.cs
- PrePrepareMethodAttribute.cs
- RegexBoyerMoore.cs
- ChtmlCommandAdapter.cs
- OraclePermissionAttribute.cs
- TextEditorDragDrop.cs
- TextFormatterHost.cs
- AddressHeaderCollection.cs
- System.Data_BID.cs
- GenericsInstances.cs
- SqlDataSourceConfigureSelectPanel.cs
- WebUtil.cs
- BuildResult.cs
- DoubleAnimation.cs
- DateTimeConverter2.cs
- BamlCollectionHolder.cs
- Vector3DAnimationBase.cs
- StrokeDescriptor.cs
- HelpFileFileNameEditor.cs
- TraceContextEventArgs.cs