The Labs \ Source Viewer \ SSCLI \ Microsoft.Win32.SafeHandles \ SafeFileMappingHandle

  1. // ==++==
  2. //
  3. //
  4. // Copyright (c) 2006 Microsoft Corporation. All rights reserved.
  5. //
  6. // The use and distribution terms for this software are contained in the file
  7. // named license.txt, which can be found in the root of this distribution.
  8. // By using this software in any fashion, you are agreeing to be bound by the
  9. // terms of this license.
  10. //
  11. // You must not remove this notice, or any other, from this software.
  12. //
  13. //
  14. // ==--==
  15. /*============================================================
  16. **
  17. ** Class:  SafeViewOfFileHandle
  18. **
  19. **
  20. ** A wrapper for file handles
  21. **
  22. **
  23. ===========================================================*/
  24. using System;
  25. using System.Security;
  26. using System.Security.Permissions;
  27. using System.Runtime.InteropServices;
  28. using System.Runtime.CompilerServices;
  29. using System.Runtime.ConstrainedExecution;
  30. using System.Runtime.Versioning;
  31. namespace Microsoft.Win32.SafeHandles
  32. {
  33.     internal sealed class SafeFileMappingHandle : SafeHandleZeroOrMinusOneIsInvalid
  34.     {
  35.         [SecurityPermission(SecurityAction.LinkDemand, UnmanagedCode = true)]
  36.         internal SafeFileMappingHandle() : base(true)
  37.         {
  38.         }
  39.        
  40.         // 0 is an Invalid Handle
  41.         [SecurityPermission(SecurityAction.LinkDemand, UnmanagedCode = true)]
  42.         internal SafeFileMappingHandle(IntPtr handle, bool ownsHandle) : base(ownsHandle)
  43.         {
  44.             SetHandle(handle);
  45.         }
  46.        
  47.         [ResourceExposure(ResourceScope.Machine)]
  48.         [ResourceConsumption(ResourceScope.Machine)]
  49.         protected override bool ReleaseHandle()
  50.         {
  51.             return Win32Native.CloseHandle(handle);
  52.         }
  53.     }
  54. }

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