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/*
* 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.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include <stdlib.h>
#include "ompi/mpi/c/bindings.h"
#include "ompi/constants.h"
#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
#pragma weak MPI_Init = PMPI_Init
#endif
#if OMPI_PROFILING_DEFINES
#include "ompi/mpi/c/profile/defines.h"
#endif
static const char FUNC_NAME[] = "MPI_Init";
int MPI_Init(int *argc, char ***argv)
{
int err;
int provided;
char *env;
int required = MPI_THREAD_SINGLE;
/* Ensure that we were not already initialized or finalized */
if (ompi_mpi_finalized) {
/* JMS show_help */
return ompi_errhandler_invoke(NULL, NULL, OMPI_ERRHANDLER_TYPE_COMM,
MPI_ERR_OTHER, FUNC_NAME);
} else if (ompi_mpi_initialized) {
/* JMS show_help */
return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_OTHER, FUNC_NAME);
}
/* check for environment overrides for required thread level. If
there is, check to see that it is a valid/supported thread level.
If not, default to MPI_THREAD_MULTIPLE. */
if (NULL != (env = getenv("OMPI_MPI_THREAD_LEVEL"))) {
required = atoi(env);
if (required < MPI_THREAD_SINGLE || required > MPI_THREAD_MULTIPLE) {
required = MPI_THREAD_MULTIPLE;
}
}
/* Call the back-end initialization function (we need to put as
little in this function as possible so that if it's profiled, we
don't lose anything) */
if (NULL != argc && NULL != argv) {
err = ompi_mpi_init(*argc, *argv, required, &provided);
} else {
err = ompi_mpi_init(0, NULL, required, &provided);
}
/* Since we don't have a communicator to invoke an errorhandler on
here, don't use the fancy-schmancy ERRHANDLER macros; they're
really designed for real communicator objects. Just use the
back-end function directly. */
if (MPI_SUCCESS != err) {
return ompi_errhandler_invoke(NULL, NULL, OMPI_ERRHANDLER_TYPE_COMM,
err < 0 ? ompi_errcode_get_mpi_code(err) :
err, FUNC_NAME);
}
return MPI_SUCCESS;
}
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