100 строки
3.2 KiB
C
100 строки
3.2 KiB
C
/*
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* Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2005 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2006 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 (c) 2007 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2007-2008 Sun Microsystems, Inc. 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 <stdlib.h>
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#include "opal/util/show_help.h"
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#include "ompi/mpi/c/bindings.h"
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#include "ompi/constants.h"
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#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
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#pragma weak MPI_Init = PMPI_Init
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#endif
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#if OMPI_PROFILING_DEFINES
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#include "ompi/mpi/c/profile/defines.h"
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#endif
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static const char FUNC_NAME[] = "MPI_Init";
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int MPI_Init(int *argc, char ***argv)
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{
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int err;
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int provided;
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char *env;
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int required = MPI_THREAD_SINGLE;
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/* Ensure that we were not already initialized or finalized */
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if (ompi_mpi_finalized) {
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if (0 == ompi_comm_rank(MPI_COMM_WORLD)) {
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opal_show_help("help-mpi-api.txt", "mpi-function-after-finalize",
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true, FUNC_NAME);
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}
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return ompi_errhandler_invoke(NULL, NULL, OMPI_ERRHANDLER_TYPE_COMM,
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MPI_ERR_OTHER, FUNC_NAME);
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} else if (ompi_mpi_initialized) {
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if (0 == ompi_comm_rank(MPI_COMM_WORLD)) {
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opal_show_help("help-mpi-api.txt", "mpi-initialize-twice",
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true, FUNC_NAME);
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}
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_OTHER, FUNC_NAME);
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}
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/* check for environment overrides for required thread level. If
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there is, check to see that it is a valid/supported thread level.
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If not, default to MPI_THREAD_MULTIPLE. */
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if (NULL != (env = getenv("OMPI_MPI_THREAD_LEVEL"))) {
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required = atoi(env);
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if (required < MPI_THREAD_SINGLE || required > MPI_THREAD_MULTIPLE) {
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required = MPI_THREAD_MULTIPLE;
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}
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}
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/* Call the back-end initialization function (we need to put as
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little in this function as possible so that if it's profiled, we
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don't lose anything) */
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if (NULL != argc && NULL != argv) {
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err = ompi_mpi_init(*argc, *argv, required, &provided);
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} else {
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err = ompi_mpi_init(0, NULL, required, &provided);
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}
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/* Since we don't have a communicator to invoke an errorhandler on
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here, don't use the fancy-schmancy ERRHANDLER macros; they're
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really designed for real communicator objects. Just use the
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back-end function directly. */
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if (MPI_SUCCESS != err) {
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return ompi_errhandler_invoke(NULL, NULL, OMPI_ERRHANDLER_TYPE_COMM,
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err < 0 ? ompi_errcode_get_mpi_code(err) :
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err, FUNC_NAME);
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}
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OPAL_CR_INIT_LIBRARY();
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return MPI_SUCCESS;
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}
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