- Request queues are now correctly managed by the ConcreteEnvironment

copy constructor and by the add_resource and remove_resource methods
  found in ConcreteHistory.
- Scheduler now adds the requests in the queue when appropriate, and
  removes them when exhausted.
- Still to implement the management of the state of requests depending
  on their position in the queue
- Still to implement the way threads block depending on the state of
  their requests
- step_forward now reuses some bunch of code taken from the prototype


git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@824 3ecf2c5c-341e-0410-92b4-d18e462d057c

src/backend/concrete_environment.hh

@@ -128,7 +128,19 @@ namespace sgpem
 
     SubRequestQueue&
 			get_request_queue(resource_key_t resource_key);		
-		
+
+
+
+    typedef std::map<resource_key_t, SubRequestQueue> SubRequestQueues;
+
+
+    /// \brief Returns the set of request queues.
+    /// Returns a reference to the map from resources to subreuqest queues.
+    /// It is needed by history to delete the queue associated to a deleted
+    /// resource.
+
+    SubRequestQueues&
+    get_subrequest_queues();
 
     /// \brief Returns a snapshot of the current scheduler's ready queue.
     /// Returns a ReadyQueue object representing the queue
@@ -158,7 +170,6 @@ namespace sgpem
 
 
   private:
-    typedef std::map<resource_key_t, SubRequestQueue> SubRequestQueues;
 
     /// \brief The container of all Resource objecs.
     /// Actually contains only DynamicResource objects.