diff -r 794671c6a8a1 src/simulator/default-simulator-impl.h
--- a/src/simulator/default-simulator-impl.h	Fri Aug 01 23:15:00 2008 +0100
+++ b/src/simulator/default-simulator-impl.h	Tue Aug 05 15:56:06 2008 +0100
@@ -56,6 +56,7 @@
   void Cancel (const EventId &ev);
   bool IsExpired (const EventId &ev) const;
   void Run (void);
+  void ProcessOneEvent (void);
   Time Now (void) const;
   Time GetDelayLeft (const EventId &id) const;
   Time GetMaximumSimulationTime (void) const;
@@ -64,7 +65,6 @@
   Ptr<Scheduler> GetScheduler (void) const;
 
 private:
-  void ProcessOneEvent (void);
   uint64_t NextTs (void) const;
 
   typedef std::list<EventId> DestroyEvents;
diff -r 794671c6a8a1 src/simulator/simulator-impl.h
--- a/src/simulator/simulator-impl.h	Fri Aug 01 23:15:00 2008 +0100
+++ b/src/simulator/simulator-impl.h	Tue Aug 05 15:56:06 2008 +0100
@@ -49,6 +49,7 @@
   virtual void Cancel (const EventId &ev) = 0;
   virtual bool IsExpired (const EventId &ev) const = 0;
   virtual void Run (void) = 0;
+  virtual void ProcessOneEvent (void) = 0;
   virtual Time Now (void) const = 0;
   virtual Time GetDelayLeft (const EventId &id) const = 0;
   virtual Time GetMaximumSimulationTime (void) const = 0;
diff -r 794671c6a8a1 src/simulator/simulator.cc
--- a/src/simulator/simulator.cc	Fri Aug 01 23:15:00 2008 +0100
+++ b/src/simulator/simulator.cc	Tue Aug 05 15:56:06 2008 +0100
@@ -143,6 +143,13 @@
 {
   NS_LOG_FUNCTION_NOARGS ();
   GetImpl ()->Run ();
+}
+
+void 
+Simulator::ProcessOneEvent (void)
+{
+  NS_LOG_FUNCTION_NOARGS ();
+  GetImpl ()->ProcessOneEvent ();
 }
 
 void 
diff -r 794671c6a8a1 src/simulator/simulator.h
--- a/src/simulator/simulator.h	Fri Aug 01 23:15:00 2008 +0100
+++ b/src/simulator/simulator.h	Tue Aug 05 15:56:06 2008 +0100
@@ -115,6 +115,11 @@
    *     is greater than or equal to the stop time.
    */
   static void Run (void);
+
+  /**
+   * Process only the next simulation event, then return immediately.
+   */
+  static void ProcessOneEvent (void);
 
   /**
    * If an event invokes this method, it will be the last