mono/tests/bug-18026.cs

   1 using System;
   2 using System.Threading;
   3
   4 public class Test
   5 {
   6         static bool done = false;
   7
   8         static void Allocator (int n)
   9         {
  10                 //Console.WriteLine (n);
  11                 if (n < 1)
  12                 {
  13                         done = true;
  14                         return;
  15                 }
  16
  17                 for (int i = 0; i < 10000; ++i)
  18                 {
  19                         var o = new object [12];
  20                         o = null;
  21                 }
  22                 ThreadPool.QueueUserWorkItem (_ => Allocator (n - 1));
  23         }
  24
  25         static void LowLimits ()
  26         {
  27                 ThreadPool.SetMinThreads (1, 1);
  28                 ThreadPool.SetMaxThreads (1, 1);
  29         }
  30
  31         static void HighLimits ()
  32         {
  33                 ThreadPool.SetMaxThreads (1000, 1000);
  34                 ThreadPool.SetMinThreads (100, 100);
  35         }
  36
  37         public static void Main ()
  38         {
  39                 var N = 10;
  40                 var dones = new bool [N];
  41                 var low = false;
  42
  43                 ThreadPool.QueueUserWorkItem (_ => Allocator (10000));
  44                 while (!done)
  45                 {
  46                         //Console.WriteLine ("new");
  47                         if (low)
  48                                 LowLimits ();
  49                         else
  50                                 HighLimits ();
  51                         low = !low;
  52
  53                         for (int i = 0; i < N; ++i)
  54                         {
  55                                 var j = i;
  56                                 dones [j] = false;
  57                                 ThreadPool.QueueUserWorkItem (_ => {
  58                                                 //Console.WriteLine ("done " + j);
  59                                                 Thread.Sleep (1);
  60                                                 dones [j] = true;
  61                                         });
  62                         }
  63
  64                         bool all_done;
  65                         do
  66                         {
  67                                 all_done = true;
  68                                 for (int i = 0; i < N; ++i)
  69                                 {
  70                                         if (!dones [i])
  71                                         {
  72                                                 all_done = false;
  73                                                 Thread.Sleep (1);
  74                                                 break;
  75                                         }
  76                                 }
  77                         } while (!all_done);
  78                 }
  79         }
  80 }