mono/tests/pinvoke17.cs

   1 using System;
   2 using System.Runtime.InteropServices;
   3
   4 [StructLayout (LayoutKind.Sequential)]
   5 public class OSVersionInfo
   6 {
   7         public int a;
   8         public int b;
   9 }
  10
  11 [StructLayout (LayoutKind.Sequential)]
  12 public struct OSVersionInfo2
  13 {
  14         public int a;
  15         public int b;
  16 }
  17
  18
  19 public class LibWrap
  20 {
  21         [DllImport ("libtest")]
  22         public static extern int GetVersionEx ([In, Out] OSVersionInfo osvi);
  23
  24         [DllImport ("libtest", EntryPoint="GetVersionEx" )]
  25         public static extern int GetVersionEx2 (ref OSVersionInfo2 osvi);
  26 }
  27
  28 public class Test
  29 {
  30         public static int Main()
  31         {
  32                 Console.WriteLine( "\nPassing OSVersionInfo as class" );
  33
  34                 OSVersionInfo osvi = new OSVersionInfo();
  35                 osvi.a = 1;
  36                 osvi.b = 2;
  37
  38                 if (LibWrap.GetVersionEx (osvi) != 5)
  39                         return 1;
  40
  41                 if (osvi.a != 2)
  42                         return 2;
  43
  44                 if (osvi.b != 3)
  45                         return 3;
  46
  47                 Console.WriteLine( "A: {0}", osvi.a);
  48                 Console.WriteLine( "B: {0}", osvi.b);
  49
  50                 Console.WriteLine( "\nPassing OSVersionInfo as struct" );
  51
  52                 OSVersionInfo2 osvi2 = new OSVersionInfo2();
  53                 osvi2.a = 1;
  54                 osvi2.b = 2;
  55
  56                 if (LibWrap.GetVersionEx2 (ref osvi2) != 5)
  57                         return 4;
  58
  59                 if (osvi2.a != 2)
  60                         return 5;
  61
  62                 if (osvi2.b != 3)
  63                         return 6;
  64
  65                 Console.WriteLine( "A: {0}", osvi2.a);
  66                 Console.WriteLine( "B: {0}", osvi2.b);
  67
  68                 return 0;
  69         }
  70 }
  71
  72
  73