BackendFactory.h
e3407fbbc611issue521

BackendFactory.h
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			/**
			* \file BackendFactory.h
			*
			* \date Jun 21, 2012
			* \author Alexandre Tuleu
			*/

			#ifndef LIBONCILLA_BACKENDFACTORY_H_
			#define LIBONCILLA_BACKENDFACTORY_H_

			#include <map>
			#include <boost/shared_ptr.hpp>
			#include <iostream>
			#include <string>
			#include <set>

			extern "C" {
			typedef void (*liboncilla_backend_entry_fct)();
			}

			namespace rci{
			namespace oncilla{


			class OncillaSynchronizer;

			class BackendFactory {
			public :
			/**
			* define the priority of the backend
			*/
			enum Priority{
			HARDWARE = 0,
			SIMULATION = 1,
			USER_DEFINED_PRIORITY = 2
			};
			/**
			* Pointer to a function that will be the entry of the Backend.
			*/
			typedef OncillaSynchronizer * (*EntryPtr)();

			static BackendFactory & Instance();



			void AddAdditionalBackend(const std::string & name);
			/**
			* Register a new backend.
			* \param p the Priority of the backend
			* \param entry the EntryPtr of the backend
			* \warning : if a backend with the same priority is already here, the call
			* will be silently discarded.
			*/
			void RegisterBackend(Priority p, EntryPtr entry);
			/**
			* \return the EntryPtr of the highest priority backend or 0 if none was
			* registered with RegisterBackend().
			*/
			EntryPtr HighestPriorityBackend();



			private:
			typedef std::map<Priority,EntryPtr> EntryByPriority;
			typedef std::set<std::string> SetOfBackendName;
			typedef std::map<std::string,void*> ListOfLoadedBackend;

			void LoadExternalBackend();

			BackendFactory();
			virtual ~BackendFactory();

			EntryByPriority d_entries;

			SetOfBackendName d_unloaded;
			ListOfLoadedBackend d_loaded;

			};

			}
			}

			#endif // LIBONCILLA_BACKENDFACTORY_H_