74 строки
2.3 KiB
C
74 строки
2.3 KiB
C
/*
|
|
* 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 size, i;
|
|
|
|
if (MPI_PARAM_CHECK) {
|
|
OMPI_ERR_INIT_FINALIZE(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);
|
|
}
|