root/ompi/mpi/c/comm_split.c

DEFINITIONS

1. MPI_Comm_split

   1 /*
   2  * Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
   3  *                         University Research and Technology
   4  *                         Corporation.  All rights reserved.
   5  * Copyright (c) 2004-2005 The University of Tennessee and The University
   6  *                         of Tennessee Research Foundation.  All rights
   7  *                         reserved.
   8  * Copyright (c) 2004-2008 High Performance Computing Center Stuttgart,
   9  *                         University of Stuttgart.  All rights reserved.
  10  * Copyright (c) 2004-2005 The Regents of the University of California.
  11  *                         All rights reserved.
  12  * Copyright (c) 2006      Cisco Systems, Inc.  All rights reserved.
  13  * Copyright (c) 2015      Research Organization for Information Science
  14  *                         and Technology (RIST). All rights reserved.
  15  * $COPYRIGHT$
  16  *
  17  * Additional copyrights may follow
  18  *
  19  * $HEADER$
  20  */
  21 #include "ompi_config.h"
  22 #include <stdio.h>
  23 
  24 #include "ompi/mpi/c/bindings.h"
  25 #include "ompi/runtime/params.h"
  26 #include "ompi/communicator/communicator.h"
  27 #include "ompi/errhandler/errhandler.h"
  28 #include "ompi/memchecker.h"
  29 
  30 #if OMPI_BUILD_MPI_PROFILING
  31 #if OPAL_HAVE_WEAK_SYMBOLS
  32 #pragma weak MPI_Comm_split = PMPI_Comm_split
  33 #endif
  34 #define MPI_Comm_split PMPI_Comm_split
  35 #endif
  36 
  37 static const char FUNC_NAME[] = "MPI_Comm_split";
  38 
  39 
  40 int MPI_Comm_split(MPI_Comm comm, int color, int key, MPI_Comm *newcomm) {
  41 
  42     int rc;
  43 
  44     MEMCHECKER(
  45         memchecker_comm(comm);
  46     );
  47 
  48     if ( MPI_PARAM_CHECK ) {
  49         OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
  50 
  51         if ( ompi_comm_invalid ( comm )) {
  52             return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_COMM,
  53                                           FUNC_NAME);
  54         }
  55 
  56         if ( color < 0 &&  MPI_UNDEFINED != color ) {
  57             return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_ARG,
  58                                           FUNC_NAME);
  59         }
  60 
  61         if ( NULL == newcomm ) {
  62             return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_ARG,
  63                                           FUNC_NAME);
  64         }
  65     }
  66 
  67     OPAL_CR_ENTER_LIBRARY();
  68 
  69     rc = ompi_comm_split ( (ompi_communicator_t*)comm, color, key,
  70                           (ompi_communicator_t**)newcomm, false);
  71     OMPI_ERRHANDLER_RETURN ( rc, comm, rc, FUNC_NAME);
  72 }