diff -r 000000000000 -r e492694451f6 samples/deadlock/src/org/apidesign/deadlock/SynchronizedFieldsInternally.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/samples/deadlock/src/org/apidesign/deadlock/SynchronizedFieldsInternally.java	Sat Jun 14 09:54:28 2008 +0200
@@ -0,0 +1,29 @@
+package org.apidesign.deadlock;
+
+public final class SynchronizedFieldsInternally {
+    // BEGIN: deadlock.ownLock
+    private final Object LOCK = new Object();
+    private int counter;
+    
+    private int getCounter() {
+        assert Thread.holdsLock(LOCK);
+        return counter;
+    } 
+    
+    private void setCounter(int c) {
+        assert Thread.holdsLock(LOCK);
+        counter = c;
+    }
+    // END: deadlock.ownLock
+    
+    
+    public void increment() {
+        synchronized (LOCK) {
+            setCounter(getCounter() + 1);
+        }
+    }
+    
+    public void unsafeDecrement() {
+        setCounter(getCounter() - 1);
+    }
+}