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openmpi/ompi/mpi/c/bcast.c
Jeff Squyres ad647b105d Error checking for MPI_IN_PLACE
This commit was SVN r7343.
2005-09-13 17:07:03 +00:00

89 строки
2.4 KiB
C

/*
* Copyright (c) 2004-2005 The Trustees of Indiana University.
* All rights reserved.
* Copyright (c) 2004-2005 The Trustees of the University of Tennessee.
* 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 <stdio.h>
#include "mpi/c/bindings.h"
#include "ompi/datatype/datatype.h"
#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
#pragma weak MPI_Bcast = PMPI_Bcast
#endif
#if OMPI_PROFILING_DEFINES
#include "mpi/c/profile/defines.h"
#endif
static const char FUNC_NAME[] = "MPI_Bcast";
int MPI_Bcast(void *buffer, int count, MPI_Datatype datatype,
int root, MPI_Comm comm)
{
int err;
if (MPI_PARAM_CHECK) {
err = MPI_SUCCESS;
OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
if (ompi_comm_invalid(comm)) {
return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_COMM,
FUNC_NAME);
}
/* Errors for all ranks */
OMPI_CHECK_DATATYPE_FOR_SEND(err, datatype, count);
OMPI_ERRHANDLER_CHECK(err, comm, err, FUNC_NAME);
if (MPI_IN_PLACE == buffer) {
return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_ARG, FUNC_NAME);
}
/* Errors for intracommunicators */
if (OMPI_COMM_IS_INTRA(comm)) {
if ((root >= ompi_comm_size(comm)) || (root < 0)) {
return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_ROOT, FUNC_NAME);
}
}
/* Errors for intercommunicators */
else {
if (! ((root >= 0 && root < ompi_comm_remote_size(comm)) ||
MPI_ROOT == root || MPI_PROC_NULL == root)) {
return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_ROOT, FUNC_NAME);
}
}
}
/* If there's only one node, we're done */
if (OMPI_COMM_IS_INTRA(comm) && ompi_comm_size(comm) <= 1) {
return MPI_SUCCESS;
}
/* Can we optimize? */
if (count == 0) {
return MPI_SUCCESS;
}
/* Invoke the coll component to perform the back-end operation */
err = comm->c_coll.coll_bcast(buffer, count, datatype, root, comm);
OMPI_ERRHANDLER_RETURN(err, comm, err, FUNC_NAME);
}