Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / 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. // //[....] //[....] //[....] //----------------------------------------------------------------------------- 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.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- PatternMatcher.cs
- ComboBox.cs
- Form.cs
- NotImplementedException.cs
- RegexBoyerMoore.cs
- LinqDataSourceHelper.cs
- MaskedTextProvider.cs
- SamlDelegatingWriter.cs
- SingleKeyFrameCollection.cs
- BoundField.cs
- IgnorePropertiesAttribute.cs
- RestHandler.cs
- ComponentRenameEvent.cs
- GreaterThanOrEqual.cs
- Win32.cs
- While.cs
- MarshalDirectiveException.cs
- Block.cs
- dsa.cs
- ListBase.cs
- IListConverters.cs
- MsmqHostedTransportConfiguration.cs
- ColorMatrix.cs
- FreezableOperations.cs
- SoundPlayer.cs
- UnaryNode.cs
- Assembly.cs
- PersistenceProvider.cs
- NTAccount.cs
- TableItemProviderWrapper.cs
- IconHelper.cs
- SecurityPolicySection.cs
- RetrieveVirtualItemEventArgs.cs
- PlainXmlDeserializer.cs
- SqlWebEventProvider.cs
- RTTrackingProfile.cs
- HtmlInputFile.cs
- TextBoxBase.cs
- EventLogStatus.cs
- SecurityException.cs
- CategoryNameCollection.cs
- CalculatedColumn.cs
- DocumentReference.cs
- XmlBinaryReader.cs
- InstancePersistenceEvent.cs
- _MultipleConnectAsync.cs
- UniformGrid.cs
- TypeDefinition.cs
- WorkflowMarkupSerializerMapping.cs
- InteropExecutor.cs
- HtmlFormWrapper.cs
- VisualTreeHelper.cs
- Wildcard.cs
- UInt16Converter.cs
- NativeMethods.cs
- RadioButton.cs
- ItemChangedEventArgs.cs
- ConfigurationManagerHelper.cs
- AttachedPropertyMethodSelector.cs
- MtomMessageEncodingElement.cs
- CryptoApi.cs
- DocumentReferenceCollection.cs
- ByteStack.cs
- TextSelection.cs
- EventProxy.cs
- ReadOnlyHierarchicalDataSourceView.cs
- DispatcherExceptionEventArgs.cs
- FormsAuthenticationEventArgs.cs
- DynamicILGenerator.cs
- StreamInfo.cs
- DebugInfoExpression.cs
- EntityDataSourceWizardForm.cs
- AutomationTextAttribute.cs
- DataList.cs
- ListControlActionList.cs
- ThemeDictionaryExtension.cs
- Window.cs
- DebuggerAttributes.cs
- ClientSettingsProvider.cs
- XpsViewerException.cs
- ExpandedProjectionNode.cs
- AdvancedBindingEditor.cs
- TargetFrameworkUtil.cs
- WbemProvider.cs
- MetafileEditor.cs
- SecurityTokenSerializer.cs
- TagPrefixCollection.cs
- VSWCFServiceContractGenerator.cs
- ContainerFilterService.cs
- VisualStyleInformation.cs
- StructuralObject.cs
- HtmlWindow.cs
- SqlXmlStorage.cs
- ComponentGuaranteesAttribute.cs
- WebPartChrome.cs
- Color.cs
- MetadataWorkspace.cs
- PersonalizationStateInfoCollection.cs
- Mapping.cs
- DbConnectionPoolIdentity.cs