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/*
* Copyright (c) 2004-2007 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 (c) 2006 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2009 University of Houston. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include <stdio.h>
#include "ompi/mpi/c/bindings.h"
#include "ompi/runtime/params.h"
#include "ompi/group/group.h"
#include "ompi/errhandler/errhandler.h"
#include "ompi/communicator/communicator.h"
#include "ompi/proc/proc.h"
#if OPAL_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
#pragma weak MPI_Group_compare = PMPI_Group_compare
#endif
#if OMPI_PROFILING_DEFINES
#include "ompi/mpi/c/profile/defines.h"
#endif
static const char FUNC_NAME[] = "MPI_Group_compare";
int MPI_Group_compare(MPI_Group group1, MPI_Group group2, int *result) {
/* local variables */
int return_value, proc1, proc2, match;
bool similar, identical;
ompi_group_t *group1_pointer, *group2_pointer;
ompi_proc_t *proc1_pointer, *proc2_pointer;
OPAL_CR_NOOP_PROGRESS();
/* initialization */
return_value=MPI_SUCCESS;
/* check for errors */
if( MPI_PARAM_CHECK ) {
OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
if( ( MPI_GROUP_NULL == group1 ) || ( MPI_GROUP_NULL == group2 ) ||
(NULL == group1) || (NULL==group2) ){
return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_GROUP,
FUNC_NAME);
} else if (NULL == result) {
return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_ARG,
FUNC_NAME);
}
}
/* check for same groups */
if( group1 == group2 ) {
*result=MPI_IDENT;
return return_value;
}
/* check to see if either is MPI_GROUP_NULL or MPI_GROUP_EMPTY */
if( ( MPI_GROUP_EMPTY == group1 ) || ( MPI_GROUP_EMPTY == group2 ) ) {
*result=MPI_UNEQUAL;
return return_value;
}
/* get group pointers */
group1_pointer = (ompi_group_t *)group1;
group2_pointer = (ompi_group_t *)group2;
/* compare sizes */
if( group1_pointer->grp_proc_count != group2_pointer->grp_proc_count ) {
/* if not same size - return */
*result=MPI_UNEQUAL;
return return_value;
}
/* check for similarity */
/* loop over group1 processes */
similar=true;
identical=true;
for(proc1=0 ; proc1 < group1_pointer->grp_proc_count ; proc1++ ) {
proc1_pointer= ompi_group_peer_lookup(group1_pointer,proc1);
/* loop over group2 processes to find "match" */
match=-1;
for(proc2=0 ; proc2 < group2_pointer->grp_proc_count ; proc2++ ) {
proc2_pointer=ompi_group_peer_lookup(group2_pointer,proc2);
if( proc1_pointer == proc2_pointer ) {
if(proc1 != proc2 ) {
identical=false;
}
match=proc2;
break;
}
} /* end proc2 loop */
if( match== -1 ) {
similar=false;
identical=false;
break;
}
} /* end proc1 loop */
/* set comparison result */
if( identical ) {
*result=MPI_IDENT;
} else if( similar ) {
*result=MPI_SIMILAR;
} else {
*result=MPI_UNEQUAL;
}
return return_value;
}
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