123 строки
3.9 KiB
C
123 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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* $COPYRIGHT$
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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 "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_excl = PMPI_Group_excl
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#endif
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#if OMPI_PROFILING_DEFINES
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#include "mpi/c/profile/defines.h"
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#endif
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static const char FUNC_NAME[] = "MPI_Group_excl";
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int MPI_Group_excl(MPI_Group group, int n, int *ranks,
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MPI_Group *new_group) {
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/* local variables */
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int return_value,proc,i_excl,found,excl_proc,cnt,my_group_rank;
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ompi_group_t *group_pointer, *new_group_pointer;
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ompi_proc_t *my_proc_pointer;
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return_value = MPI_SUCCESS;
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group_pointer = (ompi_group_t *)group;
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if( MPI_PARAM_CHECK ) {
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OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
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/* verify that group is valid group */
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if ( (MPI_GROUP_NULL == group) || (NULL == group) ||
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(NULL == ranks) ) {
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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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/* check that new group is no larger than old group */
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if ( n > group_pointer->grp_proc_count) {
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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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} /* end if( MPI_CHECK_ARGS) */
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if ( n == group_pointer->grp_proc_count ) {
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*new_group = MPI_GROUP_EMPTY;
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OBJ_RETAIN(MPI_GROUP_EMPTY);
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return MPI_SUCCESS;
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}
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/*
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* pull out elements
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*/
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/* get new group struct */
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new_group_pointer=ompi_group_allocate(group_pointer->grp_proc_count-n);
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if( NULL == new_group_pointer ) {
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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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/* put group elements in the list */
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cnt=0;
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for (proc = 0; proc < group_pointer->grp_proc_count; proc++) {
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found=0;
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/* check to see if this proc is in the exclusion list */
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for( i_excl=0 ; i_excl < n ; ++i_excl ) {
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excl_proc=ranks[i_excl];
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/* check to see if this proc is within range */
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if( ( 0 > excl_proc ) ||
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(excl_proc >= group_pointer->grp_proc_count)){
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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(excl_proc == proc ){
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found=1;
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break;
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}
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} /* end i_excl loop */
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if( !found ) {
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new_group_pointer->grp_proc_pointers[cnt] =
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group_pointer->grp_proc_pointers[proc];
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cnt++;
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}
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} /* end proc loop */
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/* increment proc reference counters */
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ompi_group_increment_proc_count(new_group_pointer);
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/* find my rank */
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my_group_rank=group_pointer->grp_my_rank;
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my_proc_pointer=group_pointer->grp_proc_pointers[my_group_rank];
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ompi_set_group_rank(new_group_pointer,my_proc_pointer);
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*new_group = (MPI_Group)new_group_pointer;
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return MPI_SUCCESS;
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}
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