- Added NullPolicyException to scheduler

- Started code for printing the state of the scheduling
- Fixed a bug in the copy constructor of DynamicThread

git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@794 3ecf2c5c-341e-0410-92b4-d18e462d057c

src/backend/ready_queue.cc

@@ -57,6 +57,13 @@ ReadyQueue::get_item_at(position index)
 	return *_scheds.at(index);
 }
 
+const sgpem::Thread&
+ReadyQueue::get_item_at(position index) const
+	throw (std::out_of_range)
+{
+	// Checks index access
+	return *_scheds.at(index);
+}
 
 void
 ReadyQueue::append(Thread& thread)