115 строки
3.3 KiB
C
115 строки
3.3 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University.
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* All rights reserved.
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* Copyright (c) 2004-2005 The Trustees of the University of Tennessee.
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* All rights 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.h"
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#include "mpi/c/bindings.h"
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#include "group/group.h"
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#include "errhandler/errhandler.h"
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#include "communicator/communicator.h"
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#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
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#pragma weak MPI_Group_compare = PMPI_Group_compare
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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_compare";
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int MPI_Group_compare(MPI_Group group1, MPI_Group group2, int *result) {
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/* local variables */
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int return_value, proc1, proc2, similar, identical, match ;
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ompi_group_t *group1_pointer, *group2_pointer;
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ompi_proc_t *proc1_pointer, *proc2_pointer;
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/* initialization */
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return_value=MPI_SUCCESS;
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/* check for errors */
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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 == group1 ) || ( MPI_GROUP_NULL == group2 ) ||
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(NULL == group1) || (NULL==group2) ){
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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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}
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/* check for same groups */
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if( group1 == group2 ) {
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*result=MPI_IDENT;
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return return_value;
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}
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/* check to see if either is MPI_GROUP_NULL or MPI_GROUP_EMPTY */
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if( ( MPI_GROUP_EMPTY == group1 ) || ( MPI_GROUP_EMPTY == group2 ) ) {
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*result=MPI_UNEQUAL;
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return return_value;
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}
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/* get group pointers */
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group1_pointer = (ompi_group_t *)group1;
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group2_pointer = (ompi_group_t *)group2;
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/* compare sizes */
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if( group1_pointer->grp_proc_count != group2_pointer->grp_proc_count ) {
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/* if not same size - return */
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*result=MPI_UNEQUAL;
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return return_value;
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}
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/* check for similarity */
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/* loop over group1 processes */
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similar=1;
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identical=1;
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for(proc1=0 ; proc1 < group1_pointer->grp_proc_count ; proc1++ ) {
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proc1_pointer=group1_pointer->grp_proc_pointers[proc1];
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/* loop over group2 processes to find "match" */
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match=-1;
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for(proc2=0 ; proc2 < group2_pointer->grp_proc_count ; proc2++ ) {
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proc2_pointer=group2_pointer->grp_proc_pointers[proc2];
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if( proc1_pointer == proc2_pointer ) {
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if(proc1 != proc2 ) {
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identical=0;
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}
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match=proc2;
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break;
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}
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} /* end proc2 loop */
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if( match== -1 ) {
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similar=false;
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break;
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}
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} /* end proc1 loop */
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/* set comparison result */
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if( identical ) {
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*result=MPI_IDENT;
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} else if( similar ) {
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*result=MPI_SIMILAR;
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} else {
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*result=MPI_UNEQUAL;
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}
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return return_value;
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}
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