root/ompi/mpi/c/init.c

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DEFINITIONS

This source file includes following definitions.
  1. MPI_Init

   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) 2004-2018 The University of Tennessee and The University
   6  *                         of Tennessee Research Foundation.  All rights
   7  *                         reserved.
   8  * Copyright (c) 2004-2006 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) 2007-2018 Cisco Systems, Inc.  All rights reserved
  13  * Copyright (c) 2007-2008 Sun Microsystems, Inc.  All rights reserved.
  14  * Copyright (c) 2015      Research Organization for Information Science
  15  *                         and Technology (RIST). All rights reserved.
  16  * $COPYRIGHT$
  17  *
  18  * Additional copyrights may follow
  19  *
  20  * $HEADER$
  21  */
  22 
  23 #include "ompi_config.h"
  24 
  25 #include <stdlib.h>
  26 
  27 #include "opal/util/show_help.h"
  28 #include "ompi/runtime/ompi_spc.h"
  29 #include "ompi/mpi/c/bindings.h"
  30 #include "ompi/communicator/communicator.h"
  31 #include "ompi/errhandler/errhandler.h"
  32 #include "ompi/constants.h"
  33 
  34 #if OMPI_BUILD_MPI_PROFILING
  35 #if OPAL_HAVE_WEAK_SYMBOLS
  36 #pragma weak MPI_Init = PMPI_Init
  37 #endif
  38 #define MPI_Init PMPI_Init
  39 #endif
  40 
  41 static const char FUNC_NAME[] = "MPI_Init";
  42 
  43 
  44 int MPI_Init(int *argc, char ***argv)
  45 {
  46     int err;
  47     int provided;
  48     char *env;
  49     int required = MPI_THREAD_SINGLE;
  50 
  51     /* check for environment overrides for required thread level.  If
  52        there is, check to see that it is a valid/supported thread level.
  53        If not, default to MPI_THREAD_MULTIPLE. */
  54 
  55     if (NULL != (env = getenv("OMPI_MPI_THREAD_LEVEL"))) {
  56         required = atoi(env);
  57         if (required < MPI_THREAD_SINGLE || required > MPI_THREAD_MULTIPLE) {
  58             required = MPI_THREAD_MULTIPLE;
  59         }
  60     }
  61 
  62     /* Call the back-end initialization function (we need to put as
  63        little in this function as possible so that if it's profiled, we
  64        don't lose anything) */
  65 
  66     if (NULL != argc && NULL != argv) {
  67         err = ompi_mpi_init(*argc, *argv, required, &provided, false);
  68     } else {
  69         err = ompi_mpi_init(0, NULL, required, &provided, false);
  70     }
  71 
  72     /* Since we don't have a communicator to invoke an errorhandler on
  73        here, don't use the fancy-schmancy ERRHANDLER macros; they're
  74        really designed for real communicator objects.  Just use the
  75        back-end function directly. */
  76 
  77     if (MPI_SUCCESS != err) {
  78         return ompi_errhandler_invoke(NULL, NULL,
  79                                       OMPI_ERRHANDLER_TYPE_COMM,
  80                                       err <
  81                                       0 ? ompi_errcode_get_mpi_code(err) :
  82                                       err, FUNC_NAME);
  83     }
  84 
  85     OPAL_CR_INIT_LIBRARY();
  86 
  87     SPC_INIT();
  88 
  89     return MPI_SUCCESS;
  90 }

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