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liboncilla/src/BackendFactory.h
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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 <tr1/memory>
namespace rci{
namespace oncilla{
class OncillaSynchronizer;
typedef std::tr1::shared_ptr<OncillaSynchronizer> OncillaSynchronizerPtr;
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 OncillaSynchronizerPtr (*EntryPtr)();
static BackendFactory & Instance();
/**
* 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() const;
private:
typedef std::map<Priority,EntryPtr> EntryByPriority;
EntryByPriority d_entries;
};
template <typename OncillaSynchronizerSubClass , BackendFactory::Priority P>
class BackendRegistrator {
public :
BackendRegistrator();
};
template <class OncillaSynchronizerSubClass , BackendFactory::Priority P>
inline
BackendRegistrator<OncillaSynchronizerSubClass , P>::BackendRegistrator(){
BackendFactory::Instance().RegisterBackend(P,
&(OncillaSynchronizerSubClass::Create));
}
#define LIBONCILLA_REGISTER_THIS_CLASS(ClassName,PriorityValue) public :\
static rci::oncilla::OncillaSynchronizerPtr Create();\
private :\
static rci::oncilla::BackendRegistrator < ClassName , PriorityValue > s_registrator;
#endif // LIBONCILLA_BACKENDFACTORY_H_
}
}
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