2000-03-23 13:35:44 +01:00
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// Test interrupt() behaviour on a thread in wait(), sleep(), and spinning
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// in a loop.
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// Origin: Bryce McKinlay <bryce@albatross.co.nz>
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class Waiter extends Thread
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{
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public synchronized void run()
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{
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System.out.println ("wait()");
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try
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{
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wait();
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System.out.println("Error: wait() completed normally.");
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}
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catch (InterruptedException x)
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{
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if (isInterrupted() || interrupted())
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System.out.println("Error: interrupt flag is still set.");
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}
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System.out.println("interrupted - ok");
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}
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}
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class Sleeper extends Thread
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{
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public void run()
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{
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System.out.println ("sleep()");
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try
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{
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sleep(2000);
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System.out.println("Error: sleep() completed normally.");
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}
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catch (InterruptedException x)
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{
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if (isInterrupted() || interrupted())
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System.out.println("Error: interrupt flag is still set.");
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System.out.println("interrupted - ok");
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}
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}
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}
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class Looper extends Thread
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{
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2002-03-22 12:18:03 +01:00
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// Return the number of Thread.yield()s we can do in 500ms.
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static long calibrate ()
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{
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long i = 1;
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for (int tries = 0; tries < 40; tries++)
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{
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long t = System.currentTimeMillis();
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for (long n = 0; n < i; n++)
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Thread.yield();
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long t_prime = System.currentTimeMillis();
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if (t_prime - t > 500)
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return i;
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i *= 2;
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}
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// We have no system clock. Give up.
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throw new RuntimeException ("We have no system clock.");
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}
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static long yields = calibrate ();
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2000-03-23 13:35:44 +01:00
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public void run()
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{
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System.out.println ("Busy waiting");
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int count = 0;
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2002-03-22 12:18:03 +01:00
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for (long i=0; i < yields; i++)
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2000-03-23 13:35:44 +01:00
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{
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Thread.yield();
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count += 5;
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if (isInterrupted ())
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break;
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}
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synchronized (this)
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{
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if (interrupted ())
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{
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System.out.println ("interrupted - ok");
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if (isInterrupted () || interrupted ())
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System.out.println("Error: interrupt flag is still set.");
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}
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else
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System.out.println ("Error: Busy wait was not interrupted.");
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}
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}
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}
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class Joiner extends Thread
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{
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public void run()
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{
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System.out.println("join()");
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try
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{
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join(2000);
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System.out.println("Error: join() completed normally??!");
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}
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catch (InterruptedException x)
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{
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if (isInterrupted() || interrupted())
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System.out.println("Error: interrupt flag is still set.");
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System.out.println("interrupted - ok");
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}
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}
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}
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public class Thread_Interrupt
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{
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public static void main(String args[])
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{
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Waiter w = new Waiter();
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w.start ();
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sleep_and_interrupt (w);
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Sleeper s = new Sleeper();
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s.start ();
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sleep_and_interrupt (s);
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Looper l = new Looper ();
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l.start ();
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sleep_and_interrupt (l);
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Joiner j = new Joiner ();
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j.start ();
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sleep_and_interrupt (j);
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}
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public static void sleep_and_interrupt(Thread t)
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{
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try
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{
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Thread.sleep (250);
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t.interrupt ();
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long t1 = System.currentTimeMillis();
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t.join (5000);
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long time = System.currentTimeMillis() - t1;
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if (time > 2900)
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{
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System.out.println ("Error: join() from main thread timed out");
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}
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}
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catch (InterruptedException x)
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{
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System.out.println("Error: main thread interrupted.");
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}
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}
|
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}
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