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// Test that monitor locks work and are recursive.
// Origin: Bryce McKinlay <bryce@albatross.co.nz>
class T implements Runnable
{
public int count = 0;
Counter c;
public T (Counter c)
{
this.c = c;
}
public void run()
{
while (true)
{
// NOTE: double-synchronization here.
synchronized (c)
{
if (c.getCount() <= 100000)
count++;
else
break;
}
}
}
}
class Counter
{
int i = 0;
public synchronized int getCount ()
{
return ++i;
}
}
public class Thread_Monitor
{
public static void main(String args[])
{
Counter c = new Counter();
T t1 = new T(c);
T t2 = new T(c);
Thread th1 = new Thread(t1);
Thread th2 = new Thread(t2);
th1.start();
th2.start();
try
{
th1.join();
th2.join();
}
catch (InterruptedException x)
{
System.out.println("failed: Interrupted");
}
if (t1.count + t2.count == 100000)
System.out.println ("ok");
else
System.out.println ("failed: total count incorrect");
}
}
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