type_dup.c

MPI stands for the Message Passing Interface. Written by the MPI Forum (a large committee comprising

/*
 * Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
 *                         University Research and Technology
 *                         Corporation.  All rights reserved.
 * Copyright (c) 2004-2005 The University of Tennessee and The University
 *                         of Tennessee Research Foundation.  All rights
 *                         reserved.
 * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart, 
 *                         University of Stuttgart.  All rights reserved.
 * Copyright (c) 2004-2005 The Regents of the University of California.
 *                         All rights reserved.
 * $COPYRIGHT$
 * 
 * Additional copyrights may follow
 * 
 * $HEADER$
 */

#include "ompi_config.h"

#include "ompi/mpi/c/bindings.h"
#include "ompi/datatype/datatype.h"
#include "ompi/attribute/attribute.h"

#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
#pragma weak MPI_Type_dup = PMPI_Type_dup
#endif

#if OMPI_PROFILING_DEFINES
#include "ompi/mpi/c/profile/defines.h"
#endif

static const char FUNC_NAME[] = "MPI_Type_dup";


int MPI_Type_dup (MPI_Datatype type,
                  MPI_Datatype *newtype)
{
   int rc;

   if( MPI_PARAM_CHECK ) {
      OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
      if (NULL == type || MPI_DATATYPE_NULL == type ||
          NULL == newtype) {
        return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_TYPE,
                                      FUNC_NAME );
      }
   }

   
   if( (rc = ompi_ddt_duplicate( type, newtype )) != MPI_SUCCESS ) {
      ompi_ddt_destroy( newtype );
      OMPI_ERRHANDLER_RETURN( MPI_ERR_INTERN, MPI_COMM_WORLD,
                             MPI_ERR_INTERN, FUNC_NAME );
   }

   ompi_ddt_set_args( *newtype, 0, NULL, 0, NULL, 1, &type, MPI_COMBINER_DUP );

    /* Copy all the old attributes, if there were any.  This is done
       here (vs. ompi_ddt_duplicate()) because MPI_TYPE_DUP is the
       only MPI function that copies attributes.  All other MPI
       functions that take an old type and generate a newtype do not
       copy attributes.  Really. */
    if (NULL != type->d_keyhash) {
        ompi_attr_hash_init(&(*newtype)->d_keyhash);
        if (OMPI_SUCCESS != (rc = ompi_attr_copy_all(TYPE_ATTR,
                                                     type, *newtype,
                                                     type->d_keyhash,
                                                     (*newtype)->d_keyhash))) {
            ompi_ddt_destroy(newtype);
            OMPI_ERRHANDLER_RETURN( MPI_ERR_INTERN, MPI_COMM_WORLD,
                                    MPI_ERR_INTERN, FUNC_NAME );
        }                                    
    }

   return MPI_SUCCESS;
}