1 files changed, 64 insertions, 0 deletions
diff --git a/libjava/testsuite/libjava.lang/Thread_Monitor.java b/libjava/testsuite/libjava.lang/Thread_Monitor.java
new file mode 100644
index 000000000..649a75c76
--- /dev/null
+++ b/libjava/testsuite/libjava.lang/Thread_Monitor.java
@@ -0,0 +1,64 @@
+// Test that monitor locks work and are recursive.
+
+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");
+  }
+}