- Added Policy::wants() and updated related code. Scheduler::get_ready_queue() still always returns a process queue...

git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@615 3ecf2c5c-341e-0410-92b4-d18e462d057c

src/backend/policy.hh

@@ -33,6 +33,12 @@
 namespace sgpem
 {
 
+	enum policy_sorts_type
+	{
+	  policy_sorts_threads,
+	  policy_sorts_processes
+	};
+
 	class Policy;
 	
   	/**	\brief 
@@ -44,6 +50,7 @@ namespace sgpem
 	class SG_DLLEXPORT Policy 
 	{
 	public:
+	
 		virtual ~Policy();
 	  
 		/**
@@ -95,7 +102,17 @@ namespace sgpem
 		  \return Time quantum for the policy.
 		 */
 		virtual int get_time_slice() const throw(UserInterruptException) = 0;
-	  
+
+		/**
+		  Tell what kind of entities are scheduled by this policy.
+
+		  Because it's a pure virtual method, must be re-implemented 
+		  in concrete derived classes.
+		  \return A SortsType value identifying the desired type for the objects
+		   composing the queue passed to the sort_queue method.
+		 */
+ 		virtual policy_sorts_type wants() const throw(UserInterruptException) = 0;
+ 
 		/**
 		  Gets the parameters related with this policy.
 

src/backend/scheduler.cc

@@ -49,6 +49,7 @@ Scheduler::get_instance()
 SchedulableQueue*			
 Scheduler::get_ready_queue()
 {
+  // FIXME return the correct queue accordingly to the value returned by Policy::wants()
   return &_ready_queue;	
 }