MpiStructBuilder.h

#ifdef  UTIL_MPI
#ifndef UTIL_STRUCT_BUILDER_H
#define UTIL_STRUCT_BUILDER_H
 
/*
* Util Package - C++ Utilities for Scientific Computation
*
* Copyright 2010 - 2017, The Regents of the University of Minnesota
* Distributed under the terms of the GNU General Public License.
*/
 
#include <util/global.h>
 
namespace Util
{

   class MpiStructBuilder
   {
   
   public:
   
      MpiStructBuilder();
   
      void setBase(void* objectAddress); 
   
      void addMember(void* memberAddress, MPI::Datatype type, int count = 1);
   
      void commit(MPI::Datatype& newType);
   
   private:
   
      static const int MaxNBlock = 20;      // Maximum allowed number of members
   
      MPI::Aint     base_;                  // address of example object
      MPI::Datatype types_[MaxNBlock];      // datatypes of members
      MPI::Aint     addresses_[MaxNBlock];  // addresses of members
      int           counts_[MaxNBlock];     // counts of members
      int           nMember_;               // number of members added
   
   };
}
#endif
#endif