mcs/class/referencesource/mscorlib/microsoft/win32/safehandles/saferegistryhandle.cs

   1 // ==++==
   2 //
   3 //   Copyright (c) Microsoft Corporation.  All rights reserved.
   4 //
   5 // ==--==
   6 //
   7 // File: SafeRegistryHandle.cs
   8 //
   9 // <OWNER>[....]</OWNER>
  10 //
  11 // Implements Microsoft.Win32.SafeHandles.SafeRegistryHandle
  12 //
  13 // ======================================================================================
  14 #if !FEATURE_PAL || MONO
  15 namespace Microsoft.Win32.SafeHandles {
  16     using System;
  17     using System.Security;
  18     using System.Security.Permissions;
  19     using System.Runtime.InteropServices;
  20     using System.Runtime.CompilerServices;
  21     using System.Runtime.ConstrainedExecution;
  22     using System.Runtime.Versioning;
  23
  24     [System.Security.SecurityCritical]
  25     public sealed class SafeRegistryHandle : SafeHandleZeroOrMinusOneIsInvalid {
  26         [System.Security.SecurityCritical]
  27         internal SafeRegistryHandle() : base(true) {}
  28
  29         [System.Security.SecurityCritical]
  30         public SafeRegistryHandle(IntPtr preexistingHandle, bool ownsHandle) : base(ownsHandle) {
  31             SetHandle(preexistingHandle);
  32         }
  33
  34 #if MOBILE
  35         override protected bool ReleaseHandle() {
  36             return true;
  37         }
  38 #else
  39         [System.Security.SecurityCritical]
  40         override protected bool ReleaseHandle() {
  41             return (RegCloseKey(handle) == Win32Native.ERROR_SUCCESS);
  42         }
  43
  44         [DllImport(Win32Native.ADVAPI32),
  45          SuppressUnmanagedCodeSecurity,
  46          ResourceExposure(ResourceScope.None),
  47          ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
  48         internal static extern int RegCloseKey(IntPtr hKey);
  49 #endif
  50     }
  51 }
  52 #endif // !FEATURE_PAL