mono/tests/sgen-bridge-xref.cs

   1 using System;
   2 using System.Collections;
   3 using System.Collections.Generic;
   4 using System.Threading;
   5
   6 public class Bridge {
   7         public int __test;
   8         public string id;
   9         public List<object> link = new List<object> ();
  10
  11         ~Bridge () {
  12         }
  13 }
  14
  15 class Driver {
  16         static WeakReference<Bridge> root, child;
  17
  18         static void SetupLinks () {
  19                 var a = new Bridge () { id = "bridge" };
  20                 var b = new Bridge () { id = "child" };
  21                 a.link.Add (b);
  22                 a.__test = 1;
  23                 b.__test = 0;
  24                 root = new WeakReference<Bridge> (a, true);
  25                 child = new WeakReference<Bridge> (b, true);
  26         }
  27
  28         static int Main ()
  29         {
  30                 var t = new Thread (SetupLinks);
  31                 t.Start ();
  32                 t.Join ();
  33
  34                 GC.Collect ();
  35                 Bridge a, b;
  36                 a = b = null;
  37                 Console.WriteLine ("try get A {0}", root.TryGetTarget (out a));
  38                 Console.WriteLine ("try get B {0}", child.TryGetTarget (out b));
  39                 Console.WriteLine ("a is null {0}", a == null);
  40                 Console.WriteLine ("b is null {0}", b == null);
  41                 if (a == null || b == null)
  42                         return 1;
  43
  44                 Console.WriteLine ("a test {0}", a.__test);
  45                 Console.WriteLine ("b test {0}", b.__test);
  46
  47                 if (a.__test != 1 || b.__test != 3)
  48                         return 2;
  49
  50                 return 0;
  51         }
  52 }