- Make libpyloader a loadable plugin (warning: won't work

on Window$ unless you change the string "libpyloader" to
"pyloader" into main.cc)
- Fix Makefile to support module creation and loading
- 2DO: 
	- Add a class into backend to load and manage plugins
	- Install plugins into separate directory
	- Remove hardcoded paths


git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@458 3ecf2c5c-341e-0410-92b4-d18e462d057c

src/backend/scheduler.cc

@@ -20,29 +20,33 @@
 
 #include "policy.hh"
 #include "scheduler.hh"
+#include "policy_manager.hh"
 using namespace std;
 using namespace sgpem;
 using namespace memory;
 
-//static object
-Scheduler Scheduler::_instance(10);		//dummy parameter
+Scheduler* 
+Scheduler::_instance = 0;
 
-/**
-	
-*/
-Scheduler::Scheduler(int)			//private constructor. The parameter is discarded
-{}
+//private constructor. The parameter is discarded
+Scheduler::Scheduler()
+  : _policy_manager(PolicyManager::get_registered_manager())
+{
+  _policy_manager.init();
+}
 
 Scheduler&
 Scheduler::get_instance()
 {
-	return _instance;
+  if(!_instance)
+    _instance = new Scheduler();
+  return *_instance;
 }
 
 SchedulableList*			
 Scheduler::get_ready_queue()
 {
-	return &_ready_queue;	
+  return &_ready_queue;	
 }
 
 
@@ -58,23 +62,24 @@ Scheduler::reset_status()
 	// restore the policy
 }
 
-void
+/* void
 Scheduler::set_policy(Policy* p)
 {
-	_policy = p;
-}
+  _policy_manager.set_policy(p);
+  }*/
 
 
-Policy*
+Policy&
 Scheduler::get_policy()
 {
-	return _policy;
+  return _policy_manager.get_policy();
 }
 
 
 void
 Scheduler::step_forward()
 {
+        Policy& policy = get_policy();
 	
 	History& h = History::get_instance();
 	//******************
@@ -107,7 +112,7 @@ Scheduler::step_forward()
 			//cout << "\nnuovo running: " << initial->get_item_at(i)->get_schedulable()->get_name();
 				
 			//restore the old running schedulable
-			if (_policy->is_pre_emptive() == false && running_ptr)
+			if (policy.is_pre_emptive() == false && running_ptr)
 				_ready_queue.remove(0);
 
 			//adds the NEW one
@@ -116,10 +121,10 @@ Scheduler::step_forward()
 			initial->get_item_at(i)->set_state(SchedulableStatus::state_ready);
 			
 			// Sort the queue
-			_policy->sort_queue(event_schedulable_arrival);
+			policy.sort_queue(event_schedulable_arrival);
 		
 			//restore the old running schedulable
-			if (_policy->is_pre_emptive() == false && running_ptr)
+			if (policy.is_pre_emptive() == false && running_ptr)
 				_ready_queue.add_at_top(*running_ptr);
 		}
 	
@@ -143,14 +148,14 @@ Scheduler::step_forward()
 		running_ptr = NULL;
 		
 		//IF _ready_queue.size() == 0 sort_queue(...) is called but has no effect!!
-		_policy->sort_queue(event_schedulable_termination);
+		policy.sort_queue(event_schedulable_termination);
 	}
 	
 	//*****************
 	// Check for time slice
 	//*****************
-	if (_policy->get_time_slice() != numeric_limits<int>::max())	//time-slice
-		_policy->sort_queue(event_end_time_slice);
+	if (policy.get_time_slice() != numeric_limits<int>::max())	//time-slice
+		policy.sort_queue(event_end_time_slice);
 	
 	//******************
 	// Create the final list of schedulable