mono/tests/marshal3.cs

   1 using System;
   2 using System.Runtime.InteropServices;
   3
   4 public class Test {
   5
   6
   7         [StructLayout (LayoutKind.Sequential)]
   8         public struct BlittableStruct {
   9                 public int a;
  10                 public int b;
  11         }
  12
  13         public unsafe static int Main () {
  14                 BlittableStruct ss = new BlittableStruct ();
  15                 int size = Marshal.SizeOf (typeof (BlittableStruct));
  16
  17                 Console.WriteLine ("BlittableStruct:" + size);
  18                 if (size != 8)
  19                         return 1;
  20
  21                 IntPtr p = Marshal.AllocHGlobal (size);
  22                 ss.a = 123;
  23                 ss.b = 124;
  24
  25                 Marshal.StructureToPtr (ss, p, false);
  26                 Type t = ss.GetType ();
  27
  28                 if (Marshal.ReadInt32 (p, 0) != 123)
  29                         return 1;
  30                 if (Marshal.ReadInt32 (p, 4) != 124)
  31                         return 1;
  32
  33                 BlittableStruct cp = (BlittableStruct)Marshal.PtrToStructure (p, ss.GetType ());
  34
  35                 if (cp.a != 123)
  36                         return 2;
  37
  38                 if (cp.b != 124)
  39                         return 2;
  40
  41                 return 0;
  42         }
  43 }
  44