/*
 * @file:   communicatorgroup.hh
 * @uthor: Jordan P. Lefebvre, lefebvrejp@ornl.gov
 *
 * Created on July 3, 2013, 12:48 PM
 */

#ifndef RADIX_RADIXPARA_COMMUNICATORGROUP_HH_
#define RADIX_RADIXPARA_COMMUNICATORGROUP_HH_
#include <memory>

#include "radixcore/visibility.hh"

#ifdef USE_MPI
#include <mpi.h>
#endif

namespace radix
{
namespace Private
{
#ifdef USE_MPI

/**
 * @class MPICommGroup
 * @brief MPI implementation of CommunicatorGroup
 */
class RADIX_PUBLIC MPICommGroup
{
 public:
  MPICommGroup();
  MPICommGroup(MPI_Group group);
  virtual ~MPICommGroup();
  /**
   * @brief rank of group
   * @return <b>int</b>
   */
  virtual int rank() const;
  /**
   * @brief size of group
   * @return <b>int</b>
   */
  virtual int size() const;

 private:
  MPI_Group group;

};     // class MPICommGroup
#endif /** ifdef USE_MPI **/

/**
 * @class SerialCommGroup
 * @brief Serial implementation of CommGroup
 */

class RADIX_PUBLIC SerialCommGroup
{
 public:
  SerialCommGroup();
  virtual ~SerialCommGroup();
  /**
   * @brief rank of group
   * @return <b>int</b>
   */
  virtual int rank() const;
  /**
   * @brief size of group
   * @return <b>int</b>
   */
  virtual int size() const;

 private:
};  // class SerialCommGroup
}  // namespace Private
/**
 * @class CommunicatorGroup
 * @brief Simply pure interface to describe communicator group
 */
#ifdef USE_MPI
template <class GroupImpl = Private::MPICommGroup>
#else
template <class GroupImpl = Private::SerialCommGroup>
#endif
class RADIX_PUBLIC CommunicatorGroupImpl : public GroupImpl
{
 public:
  /**
   * Default constructor
   */
  CommunicatorGroupImpl();
  /**
   * Copy constructor
   */
  CommunicatorGroupImpl(const GroupImpl &orig);
  /**
   * Default destructor
   */
  virtual ~CommunicatorGroupImpl();

 private:
};

typedef CommunicatorGroupImpl<> CommunicatorGroup;
}  // namespace radix

//
// Include template implementations
//
#include "radixpara/communicatorgroup.i.hh"
#endif /* RADIX_RADIXPARA_COMMUNICATORGROUP_HH_ */