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/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2004-2007 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) 2004-2008 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2006-2007 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2013-2018 Los Alamos National Security, LLC. All rights
* reserved.
* Copyright (c) 2015 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* Copyright (c) 2021-2024 Triad National Security, LLC. All rights
* reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include <stdio.h>
#include "ompi/mpi/c/bindings.h"
#include "ompi/runtime/params.h"
#include "ompi/communicator/communicator.h"
#include "ompi/errhandler/errhandler.h"
#include "ompi/mca/pml/pml.h"
#include "ompi/memchecker.h"
#if OMPI_BUILD_MPI_PROFILING
#if OPAL_HAVE_WEAK_SYMBOLS
#pragma weak MPI_Comm_create_from_group = PMPI_Comm_create_from_group
#endif
#define MPI_Comm_create_from_group PMPI_Comm_create_from_group
#endif
static const char FUNC_NAME[] = "MPI_Comm_create_from_group";
int MPI_Comm_create_from_group (MPI_Group group, const char *tag, MPI_Info info, MPI_Errhandler errhandler,
MPI_Comm *newcomm) {
int rc;
char *pmix_group_tag = NULL;
MEMCHECKER(
memchecker_comm(comm);
);
if ( MPI_PARAM_CHECK ) {
OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
if (NULL == errhandler ||
MPI_ERRHANDLER_NULL == errhandler ||
( OMPI_ERRHANDLER_TYPE_COMM != errhandler->eh_mpi_object_type &&
OMPI_ERRHANDLER_TYPE_PREDEFINED != errhandler->eh_mpi_object_type) ) {
return ompi_errhandler_invoke (NULL, MPI_COMM_NULL, OMPI_ERRHANDLER_TYPE_COMM,
MPI_ERR_ARG,FUNC_NAME);
}
if (NULL == tag) {
return ompi_errhandler_invoke (errhandler, MPI_COMM_NULL, OMPI_ERRHANDLER_TYPE_COMM,
MPI_ERR_TAG, FUNC_NAME);
}
if (NULL == group) {
return ompi_errhandler_invoke (errhandler, MPI_COMM_NULL, OMPI_ERRHANDLER_TYPE_COMM,
MPI_ERR_GROUP, FUNC_NAME);
}
if (NULL == info || ompi_info_is_freed(info)) {
return ompi_errhandler_invoke (errhandler, MPI_COMM_NULL, OMPI_ERRHANDLER_TYPE_COMM,
MPI_ERR_INFO, FUNC_NAME);
}
if (NULL == newcomm) {
return ompi_errhandler_invoke (errhandler, MPI_COMM_NULL, OMPI_ERRHANDLER_TYPE_COMM,
MPI_ERR_ARG, FUNC_NAME);
}
}
if (MPI_GROUP_NULL == group || MPI_UNDEFINED == ompi_group_rank (group)) {
*newcomm = MPI_COMM_NULL;
return MPI_SUCCESS;
}
/*
* we use PMIx group operations to implement comm/intercomm create from group/groups.
* PMIx group constructors require a unique tag across the processes using the same
* PMIx server. This is not equivalent to the uniqueness requirements of the tag argument
* to MPI_Comm_create_from_group and MPI_Intercomm_create_from_groups, hence an
* additional discriminator needs to be added to the user supplied tag argument.
*/
opal_asprintf (&pmix_group_tag, "%s-%s.%d", tag, OPAL_NAME_PRINT(ompi_group_get_proc_name (group, 0)),
ompi_group_size(group));
if (OPAL_UNLIKELY(NULL == pmix_group_tag)) {
return OMPI_ERR_OUT_OF_RESOURCE;
}
rc = ompi_comm_create_from_group ((ompi_group_t *) group, pmix_group_tag, &info->super, errhandler,
(ompi_communicator_t **) newcomm);
free(pmix_group_tag);
if (MPI_SUCCESS != rc) {
return ompi_errhandler_invoke (errhandler, MPI_COMM_NULL, errhandler->eh_mpi_object_type,
rc, FUNC_NAME);
}
return rc;
}
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