- 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.hh

@@ -22,7 +22,9 @@
 #define SCHEDULER_HH 1
 namespace sgpem
 {
-	class Policy;
+  class Scheduler;
+  class PolicyManager;
+  class Policy;
 }
 
 #include "config.h"
@@ -71,9 +73,11 @@ namespace sgpem
 			event_end_time_slice
 		};
 		
-		/**
-		Returns the unique instance of this class, conforming to the Singleton pattern.
-		\return the unique instance of this class, conforming to the Singleton pattern.
+		/** \brief Returns the unique instance of this class, conforming to the Singleton pattern.
+		 * 
+		 * If Scheduler isn't initialized, creates it. Should be called at least once before
+		 * starting the Simulation.
+		 * \return the unique instance of this class, conforming to the Singleton pattern.
 		*/
 		static Scheduler&  			get_instance();
 		/**
@@ -97,19 +101,21 @@ namespace sgpem
 		Sets the policy that will be used to generate the simulation at the next instant.
 		\param policy the policy that will be used to generate the simulation at the next instant.
 		*/
+		/* DISABLED until we don't have PolicyManager::set_policy()
 		void						set_policy(Policy* policy);
+		*/
 		/**
 		Returns the policy that will be used to generate the simulation at the next instant.
 		\return the policy that will be used to generate the simulation at the next instant.
 		*/
-		Policy* 					get_policy();
+		Policy& 					get_policy();
 				
 		
 	private:
-		Scheduler(int);					//private constructor. The parameter is discarded
-		static Scheduler  	_instance;
+		Scheduler();					//private constructor.
+		static Scheduler*       _instance;
 		SchedulableList		_ready_queue;
-		Policy* 			_policy;
+		PolicyManager& 		_policy_manager;
 	};
 
 }//~ namespace sgpem