b8c9adc833
group_range_incl/excl has now been separated from the implementation. This commit was SVN r9311.
124 строки
3.9 KiB
C
124 строки
3.9 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2005 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 2006 University of Houston. All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "ompi_config.h"
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#include <stdio.h>
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#include "ompi/mpi/c/bindings.h"
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#include "ompi/group/group.h"
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#include "ompi/errhandler/errhandler.h"
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#include "ompi/communicator/communicator.h"
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#include "ompi/proc/proc.h"
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#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
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#pragma weak MPI_Group_range_excl = PMPI_Group_range_excl
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#endif
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#if OMPI_PROFILING_DEFINES
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#include "ompi/mpi/c/profile/defines.h"
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#endif
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static const char FUNC_NAME[] = "MPI_Group_range_excl";
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int MPI_Group_range_excl(MPI_Group group, int n_triplets, int ranges[][3],
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MPI_Group *new_group)
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{
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int err, i, group_size,index,*elements_int_list;
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/* can't act on NULL group */
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if( MPI_PARAM_CHECK ) {
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OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
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if ( (MPI_GROUP_NULL == group) || (NULL == group) ) {
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_GROUP,
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FUNC_NAME);
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}
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group_size = ompi_group_size ( group );
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elements_int_list = (int *)
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malloc(sizeof(int) * group_size);
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if (NULL == elements_int_list) {
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_OTHER,
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FUNC_NAME);
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}
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for (i = 0; i < group_size; i++) {
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elements_int_list[i] = -1;
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}
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for (i = 0; i < n_triplets; i++) {
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if ((0 > ranges[i][0]) || (ranges[i][0] > group_size )) {
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_RANK,
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FUNC_NAME);
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}
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if ((0 > ranges[i][1]) || (ranges[i][1] > group_size )) {
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_RANK,
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FUNC_NAME);
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}
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if (ranges[i][2] == 0) {
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_RANK,
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FUNC_NAME);
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}
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if ( (ranges[i][0] < ranges[i][1])) {
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if( ( ranges[i][2] < 0) ) {
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_RANK,
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FUNC_NAME);
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}
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/* positive stride */
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for (index = ranges[i][0]; index <= ranges[i][1]; index += ranges[i][2]) {
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/* make sure rank has not already been selected */
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if (elements_int_list[index] != -1) {
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free(elements_int_list);
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_RANK,
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FUNC_NAME);
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}
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}
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}
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if ( (ranges[i][0] > ranges[i][1])) {
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if((ranges[i][2] > 0)) {
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_RANK,
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FUNC_NAME);
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}
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/* negative stride */
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for (index = ranges[i][0]; index >= ranges[i][1]; index += ranges[i][2]) {
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/* make sure rank has not already been selected */
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if (elements_int_list[index] != -1) {
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free(elements_int_list);
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_RANK,
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FUNC_NAME);
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}
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}
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}
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else {
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/* first_rank == last_rank */
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index = ranges[i][0];
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if (elements_int_list[index] != -1) {
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free(elements_int_list);
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_RANK,
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FUNC_NAME);
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}
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}
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}
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free (elements_int_list);
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}
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err = ompi_group_range_excl(group,n_triplets,ranges,new_group);
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OMPI_ERRHANDLER_RETURN(err, MPI_COMM_WORLD,err,FUNC_NAME);
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}
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