group_intersection.c

MPI stands for the Message Passing Interface. Written by the MPI Forum (a large committee comprising

/*
 * 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 (c) 2006      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/group/group.h"
#include "ompi/errhandler/errhandler.h"
#include "ompi/communicator/communicator.h"
#include "ompi/proc/proc.h"

#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
#pragma weak MPI_Group_intersection = PMPI_Group_intersection
#endif

#if OMPI_PROFILING_DEFINES
#include "ompi/mpi/c/profile/defines.h"
#endif

static const char FUNC_NAME[] = "MPI_Group_intersection";


int MPI_Group_intersection(MPI_Group group1, MPI_Group group2,
        MPI_Group *new_group) 
{
  int err;

  if ( MPI_PARAM_CHECK ) {
      OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
     
      /* verify that groups are valid */
      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);
      }
  }

  err = ompi_group_intersection ( group1, group2,  new_group );
  OMPI_ERRHANDLER_RETURN(err, MPI_COMM_WORLD, err, FUNC_NAME );
}