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/*
* 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) 2004-2008 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 (c) 2006-2008 Cisco Systems, Inc. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include <string.h>
#include "ompi/mpi/c/bindings.h"
#include "ompi/runtime/params.h"
#include "ompi/communicator/communicator.h"
#include "ompi/errhandler/errhandler.h"
#include "ompi/totalview.h"
#include "opal/threads/mutex.h"
#include "ompi/memchecker.h"
#if OPAL_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
#pragma weak MPI_Comm_get_name = PMPI_Comm_get_name
#endif
#if OMPI_PROFILING_DEFINES
#include "ompi/mpi/c/profile/defines.h"
#endif
static const char FUNC_NAME[] = "MPI_Comm_get_name";
int MPI_Comm_get_name(MPI_Comm comm, char *name, int *length)
{
MEMCHECKER(
memchecker_comm(comm);
);
OPAL_CR_NOOP_PROGRESS();
if ( MPI_PARAM_CHECK ) {
OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
if ( ompi_comm_invalid ( comm ) )
return OMPI_ERRHANDLER_INVOKE ( MPI_COMM_WORLD, MPI_ERR_COMM,
FUNC_NAME);
if ( NULL == name || NULL == length )
return OMPI_ERRHANDLER_INVOKE ( comm, MPI_ERR_ARG,
FUNC_NAME);
}
#ifdef USE_MUTEX_FOR_COMMS
OPAL_THREAD_LOCK(&(comm->c_lock));
#endif
/* Note that MPI-2.1 requires:
- terminating the string with a \0
- name[*resultlen] == '\0'
- and therefore (*resultlen) cannot be > (MPI_MAX_OBJECT_NAME-1)
The Fortran API version will pad to the right if necessary.
Note that comm->c_name is guaranteed to be \0-terminated and
able to completely fit into MPI_MAX_OBJECT_NAME bytes (i.e.,
name+\0). */
if ( comm->c_flags & OMPI_COMM_NAMEISSET ) {
strncpy(name, comm->c_name, MPI_MAX_OBJECT_NAME);
*length = (int) strlen(comm->c_name);
} else {
name[0] = '\0';
*length = 0;
}
#ifdef USE_MUTEX_FOR_COMMS
OPAL_THREAD_UNLOCK(&(comm->c_lock));
#endif
return MPI_SUCCESS;
}
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