--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/core/callback.cc	Fri Oct 17 14:15:52 2008 +0200
@@ -0,0 +1,38 @@
+#include "callback.h"
+
+namespace ns3 {
+
+CallbackValue::CallbackValue ()
+  : m_value ()
+{}
+CallbackValue::CallbackValue (const CallbackBase &base)
+  : m_value (base)
+{}
+CallbackValue::~CallbackValue ()
+{}
+void 
+CallbackValue::Set (CallbackBase base)
+{
+  m_value = base;
+}
+Ptr<AttributeValue> 
+CallbackValue::Copy (void) const
+{
+  return Create<CallbackValue> (m_value);
+}
+std::string 
+CallbackValue::SerializeToString (Ptr<const AttributeChecker> checker) const
+{
+  std::ostringstream oss;
+  oss << PeekPointer (m_value.GetImpl ());
+  return oss.str ();
+}
+bool 
+CallbackValue::DeserializeFromString (std::string value, Ptr<const AttributeChecker> checker)
+{
+  return false;
+}
+
+ATTRIBUTE_CHECKER_IMPLEMENT (Callback);
+
+} // namespace ns3