SafeNativeMethods.cs source code in C# .NET

                        Code:
                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / TransactionBridge / Microsoft / Transactions / Wsat / Clusters / SafeNativeMethods.cs / 1 / SafeNativeMethods.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------
using System;
using System.Runtime.CompilerServices; 
using System.Runtime.ConstrainedExecution;
using System.Runtime.InteropServices; 
using System.Security.AccessControl; 
using System.Security.Permissions;
using System.Text; 

using Microsoft.Win32;

namespace Microsoft.Transactions.Wsat.Clusters 
{
    abstract class SafeClusterHandle : SafeHandle 
    { 
        [SecurityPermission(SecurityAction.LinkDemand, UnmanagedCode = true)]
        internal SafeClusterHandle() 
            :
            base(IntPtr.Zero, true)
        {
        } 

        [SecurityPermission(SecurityAction.LinkDemand, UnmanagedCode = true)] 
        internal SafeClusterHandle(IntPtr hcluster) 
            :
            base(IntPtr.Zero, true) 
        {
            SetHandle(hcluster);
        }
 
        public override bool IsInvalid
        { 
            get { return IsClosed || handle == IntPtr.Zero; } 
        }
    } 

    class SafeHCluster : SafeClusterHandle
    {
        // MSDN remarks: This function always returns TRUE. 
        [DllImport(SafeNativeMethods.ClusApi)]
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] 
        static extern bool CloseCluster([In] IntPtr hCluster); 

        protected override bool ReleaseHandle() 
        {
            return CloseCluster(handle);
        }
    } 

    class SafeHResource : SafeClusterHandle 
    { 
        [DllImport(SafeNativeMethods.ClusApi)]
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)] 
        static extern bool CloseClusterResource([In] IntPtr hResource);

        protected override bool ReleaseHandle()
        { 
            return CloseClusterResource(handle);
        } 
    } 

    class SafeHClusEnum : SafeClusterHandle 
    {
        [DllImport(SafeNativeMethods.ClusApi)]
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
        static extern uint ClusterCloseEnum([In] IntPtr hEnum); 

        protected override bool ReleaseHandle() 
        { 
            return ClusterCloseEnum(handle) == SafeNativeMethods.ERROR_SUCCESS;
        } 
    }

    class SafeHKey : SafeClusterHandle
    { 
        [DllImport(SafeNativeMethods.ClusApi)]
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)] 
        static extern int ClusterRegCloseKey([In] IntPtr hEnum); 

        protected override bool ReleaseHandle() 
        {
            return ClusterRegCloseKey(handle) == SafeNativeMethods.ERROR_SUCCESS;
        }
    } 

    [Flags] 
    enum ClusterEnum : uint 
    {
        Node = 0x00000001, 
        ResType = 0x00000002,
        Resource = 0x00000004,
        Group = 0x00000008,
        Network = 0x00000010, 
        NetInterface = 0x00000020,
        InternalNetwork = 0x80000000 
    } 

    enum ClusterResourceControlCode : uint 
    {
        GetResourceType = 0x0100002d,
        //GetId = 0x01000039
    } 

    class SafeNativeMethods 
    { 
        public const string ClusApi = "clusapi.dll";
 
        public const uint ERROR_SUCCESS = 0;
        public const uint ERROR_FILE_NOT_FOUND = 2;
        public const uint ERROR_MORE_DATA = 234;
        public const uint ERROR_NO_MORE_ITEMS = 259; 

        [DllImport(ClusApi, SetLastError = true, CharSet = CharSet.Unicode)] 
        public static extern SafeHCluster OpenCluster( 
            [MarshalAs(UnmanagedType.LPWStr)] [In] string lpszClusterName);
 
        [DllImport(ClusApi, SetLastError = true, CharSet = CharSet.Unicode)]
        public static extern SafeHClusEnum ClusterOpenEnum(
            [In] SafeHCluster hCluster,
            [In] ClusterEnum dwType); 

        [DllImport(ClusApi, CharSet = CharSet.Unicode)] 
        public static extern uint ClusterEnum( 
            [In] SafeHClusEnum hEnum,
            [In] uint dwIndex, 
            [Out] out uint lpdwType,
            [Out] StringBuilder lpszName,
            [In, Out] ref uint lpcchName);
 
        [DllImport(ClusApi, CharSet = CharSet.Unicode)]
        public static extern uint ClusterResourceControl( 
            [In] SafeHResource hResource, 
            [In] IntPtr hHostNode,  //HNODE hHostNode, never used
            [In] ClusterResourceControlCode dwControlCode, 
            [In] IntPtr lpInBuffer, // LPVOID lpInBuffer, never used
            [In] uint cbInBufferSize,
            [In, Out, MarshalAs(UnmanagedType.LPArray)] byte[] buffer,
            [In] uint cbOutBufferSize, 
            [In, Out] ref uint lpcbBytesReturned);
 
        [DllImport(ClusApi, SetLastError = true, CharSet = CharSet.Unicode)] 
        public static extern SafeHResource OpenClusterResource(
            [In] SafeHCluster hCluster, 
            [In, MarshalAs(UnmanagedType.LPWStr)] string lpszResourceName);

        [DllImport(ClusApi, SetLastError = true, CharSet = CharSet.Unicode)]
        public static extern bool GetClusterResourceNetworkName( 
            [In] SafeHResource hResource,
            [Out] StringBuilder lpBuffer, 
            [In, Out] ref uint nSize); 

        [DllImport(ClusApi, SetLastError = true, CharSet = CharSet.Unicode)] 
        public static extern SafeHKey GetClusterResourceKey(
            [In] SafeHResource hResource,
            [In] RegistryRights samDesired);
 
        [DllImport(ClusApi, CharSet = CharSet.Unicode)]
        public static extern int ClusterRegOpenKey( 
            [In] SafeHKey hKey, 
            [In, MarshalAs(UnmanagedType.LPWStr)] string lpszSubKey,
            [In] RegistryRights samDesired, 
            [Out] out SafeHKey phkResult);

        [DllImport(ClusApi, CharSet = CharSet.Unicode)]
        public static extern int ClusterRegQueryValue( 
            [In] SafeHKey hKey,
            [In, MarshalAs(UnmanagedType.LPWStr)] string lpszValueName, 
            [Out] out RegistryValueKind lpdwValueType, 
            [In, Out, MarshalAs(UnmanagedType.LPArray)] byte[] lpbData,
            [In, Out] ref uint lpcbData); 
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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