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/*
* 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 <stdio.h>
#include "ompi/mpi/c/bindings.h"
#include "ompi/datatype/datatype.h"
#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
#pragma weak MPI_Get_elements = PMPI_Get_elements
#endif
#if OMPI_PROFILING_DEFINES
#include "ompi/mpi/c/profile/defines.h"
#endif
static const char FUNC_NAME[] = "MPI_Get_elements";
int MPI_Get_elements(MPI_Status *status, MPI_Datatype datatype, int *count)
{
int i;
size_t size;
if (MPI_PARAM_CHECK) {
int err = MPI_SUCCESS;
OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
if (NULL == status || MPI_STATUSES_IGNORE == status ||
MPI_STATUS_IGNORE == status || NULL == count) {
err = MPI_ERR_ARG;
} else if (NULL == datatype || MPI_DATATYPE_NULL == datatype) {
err = MPI_ERR_TYPE;
} else {
OMPI_CHECK_DATATYPE_FOR_RECV(err, datatype, 1);
}
OMPI_ERRHANDLER_CHECK(err, MPI_COMM_WORLD, err, FUNC_NAME);
}
*count = 0;
if( ompi_ddt_type_size( datatype, &size ) == MPI_SUCCESS ) {
if( size == 0 ) {
/* If the size of the datatype is zero let's return a count of zero */
return MPI_SUCCESS;
}
*count = status->_count / size;
size = status->_count - (*count) * size;
/* if basic type we should return the same result as MPI_Get_count */
if( ompi_ddt_is_predefined(datatype) ) {
if( size != 0 ) {
*count = MPI_UNDEFINED;
}
return MPI_SUCCESS;
}
if( (*count) != 0 ) {
int total; /* count the basic elements in the datatype */
for( i = 4, total = 0; i < DT_MAX_PREDEFINED; i++ )
total += datatype->btypes[i];
*count = total * (*count);
}
if( size > 0 ) {
if( (i = ompi_ddt_get_element_count( datatype, size )) != -1 )
*count += i;
else
*count = MPI_UNDEFINED;
}
return MPI_SUCCESS;
}
return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_ARG, FUNC_NAME);
}
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