mono/tests/thread3.cs

   1
   2 using System;
   3 using System.Threading;
   4
   5 public class Test {
   6         private void Thread_func() {
   7                 Console.WriteLine("In a thread!");
   8
   9                 Thread thr=Thread.CurrentThread;
  10
  11                 Console.WriteLine("Locking thr for 1.5s");
  12                 lock(thr) {
  13                         Console.WriteLine("Locked");
  14                         Thread.Sleep(2000);
  15                         Console.WriteLine("Slept for 2s");
  16                         Thread.Sleep(15000);
  17                 }
  18
  19                 Console.WriteLine("Waiting for signal");
  20                 lock(thr) {
  21                         Console.WriteLine("Waiting...");
  22                         Monitor.Wait(thr);
  23                         Console.WriteLine("Thread signalled!");
  24                 }
  25
  26                 Console.WriteLine("Sleeping for 2s");
  27                 Thread.Sleep(2000);
  28
  29                 Console.WriteLine("Leaving thread");
  30         }
  31
  32         public static int Main () {
  33                 Console.WriteLine ("Hello, World!");
  34                 Thread thr=new Thread(new ThreadStart(new Test().Thread_func));
  35                 thr.Start();
  36                 Thread.Sleep(1000);
  37
  38                 Console.WriteLine("Trying to enter lock");
  39                 if(Monitor.TryEnter(thr, 1000)==true) {
  40                         Console.WriteLine("Returned lock");
  41                         Monitor.Exit(thr);
  42                 } else {
  43                         Console.WriteLine("Didn't get lock");
  44                         // .net seems to leave thr locked here !!!!
  45
  46                         // This test deadlocks on .net with the thread
  47                         // trying to lock(thr) between the two
  48                         // WriteLine()s Monitor.Exit(thr); here and it
  49                         // magically works :) Of course, then mint
  50                         // throws a
  51                         // SynchronizationLockException... (like it
  52                         // should)
  53                         //Monitor.Exit(thr);
  54                 }
  55
  56                 Thread.Sleep(20000);
  57
  58                 lock(thr) {
  59                         Monitor.Pulse(thr);
  60                         Console.WriteLine("Signalled thread");
  61                 }
  62
  63                 thr.Join();
  64
  65                 return 0;
  66         }
  67 }
  68