libjava/testsuite/libjava.lang/Thread_Interrupt.java

   1 // Test interrupt() behaviour on a thread in wait(), sleep(), and spinning
   2 // in a loop.
   3
   4 class ThreadBase extends Thread
   5 {
   6   boolean ready = false;
   7
   8   synchronized void ready()
   9   {
  10     ready = true;
  11   }
  12 }
  13
  14 class Waiter extends ThreadBase
  15 {
  16   public synchronized void run()
  17   {
  18     super.ready();
  19     System.out.println ("wait()");
  20     try
  21     {
  22       wait();
  23       System.out.println("Error: wait() completed normally.");
  24     }
  25     catch (InterruptedException x)
  26     {
  27       if (isInterrupted() || interrupted())
  28         System.out.println("Error: interrupt flag is still set.");
  29
  30     }
  31       System.out.println("interrupted - ok");
  32   }
  33 }
  34
  35 class Sleeper extends ThreadBase
  36 {
  37   public void run()
  38   {
  39     super.ready();
  40     System.out.println ("sleep()");
  41     try
  42     {
  43       sleep(5000);
  44       System.out.println("Error: sleep() completed normally.");
  45     }
  46     catch (InterruptedException x)
  47     {
  48       if (isInterrupted() || interrupted())
  49         System.out.println("Error: interrupt flag is still set.");
  50
  51       System.out.println("interrupted - ok");
  52     }
  53   }
  54 }
  55
  56 class Looper extends ThreadBase
  57 {
  58   public void run()
  59   {
  60     super.ready();
  61     System.out.println ("Busy waiting");
  62
  63     int count = 0;
  64     long start = System.currentTimeMillis();
  65     while (true)
  66       {
  67         Thread.yield();
  68         if (isInterrupted ())
  69           break;
  70         long now = System.currentTimeMillis();
  71         if ((now - start) > 5000)
  72           break;
  73       }
  74     synchronized (this)
  75     {
  76       if (interrupted ())
  77         {
  78           System.out.println ("interrupted - ok");
  79           if (isInterrupted () || interrupted ())
  80             System.out.println("Error: interrupt flag is still set.");
  81         }
  82       else
  83         System.out.println ("Error: Busy wait was not interrupted.");
  84     }
  85   }
  86 }
  87
  88 class Joiner extends ThreadBase
  89 {
  90   public void run()
  91   {
  92     super.ready();
  93     System.out.println("join()");
  94     try
  95     {
  96       join(2000);
  97       System.out.println("Error: join() completed normally??!");
  98     }
  99     catch (InterruptedException x)
 100     {
 101       if (isInterrupted() || interrupted())
 102         System.out.println("Error: interrupt flag is still set.");
 103
 104       System.out.println("interrupted - ok");
 105     }
 106
 107   }
 108 }
 109
 110 public class Thread_Interrupt
 111 {
 112   public static void main(String args[])
 113   {
 114     Waiter w = new Waiter();
 115     w.start ();
 116     sleep_and_interrupt (w);
 117
 118     Sleeper s = new Sleeper();
 119     s.start ();
 120     sleep_and_interrupt (s);
 121
 122     Looper l = new Looper ();
 123     l.start ();
 124     sleep_and_interrupt (l);
 125
 126     Joiner j = new Joiner ();
 127     j.start ();
 128     sleep_and_interrupt (j);
 129   }
 130
 131   public static void sleep_and_interrupt(ThreadBase t)
 132   {
 133     try
 134     {
 135       synchronized (t)
 136         {
 137           while (!t.ready)
 138             t.wait(10);
 139         }
 140
 141       Thread.sleep (50);
 142       t.interrupt ();
 143       long t1 = System.currentTimeMillis();
 144       t.join (5000);
 145       long time = System.currentTimeMillis() - t1;
 146       if (time > 2900)
 147         {
 148           System.out.println ("Error: join() from main thread timed out");
 149         }
 150     }
 151     catch (InterruptedException x)
 152     {
 153       System.out.println("Error: main thread interrupted.");
 154     }
 155   }
 156 }