mono/tests/bug-6148.cs

   1 using System;
   2 using System.Runtime.InteropServices;
   3
   4
   5 [StructLayout(LayoutKind.Explicit)]
   6 struct DefaultPack
   7 {
   8         [FieldOffset(0)]
   9                 public int A;
  10         [FieldOffset(4)]
  11                 public int A1;
  12         [FieldOffset(8)]
  13                 public byte A2;
  14
  15         [FieldOffset(9)]
  16                 public int A3;
  17         [FieldOffset(13)]
  18                 public int A4;
  19 }
  20 [StructLayout(LayoutKind.Explicit, Pack=2)]
  21 struct ExplicitPack
  22 {
  23         [FieldOffset(0)]
  24                 public int A;
  25         [FieldOffset(4)]
  26                 public int A1;
  27         [FieldOffset(8)]
  28                 public byte A2;
  29
  30         [FieldOffset(9)]
  31                 public int A3;
  32         [FieldOffset(13)]
  33                 public int A4;
  34 }
  35
  36 [StructLayout(LayoutKind.Explicit, Size = 12)]
  37 struct ExplicitSize
  38 {
  39         [FieldOffset(0)]
  40     private long Data1;
  41
  42         [FieldOffset(8)]
  43     private int Data3;
  44 }
  45
  46 public class Program {
  47         public static unsafe int Main(string[] args)
  48         {
  49                 if (sizeof(DefaultPack) != 20)
  50                         return 1;
  51
  52                 if (sizeof(ExplicitPack) != 18)
  53                         return 2;
  54
  55                 if (sizeof (ExplicitSize) != 12)
  56                         return 3;
  57                 return 0;
  58         }
  59 }
  60