0b8fc13299
arrays. The MPI 3.0 standard added const to all in buffers in the C bindings. This commit adds the const keyword and in most cases casts const away. We will eventually should go through and update the various interfaces (coll, pml, io, etc) to take the const keyword. The group, comm, win, and datatype interfaces have been updated with const. cmr=v1.7.4:ticket=trac:3785:reviewer=jsquyres This commit was SVN r29266. The following Trac tickets were found above: Ticket 3785 --> https://svn.open-mpi.org/trac/ompi/ticket/3785
137 строки
4.7 KiB
C
137 строки
4.7 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
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/*
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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) 2004-2012 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) 2004-2008 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) 2006-2012 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2012-2013 Los Alamos National Security, LLC. All rights
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* 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 <stdio.h>
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#include "ompi/mpi/c/bindings.h"
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#include "ompi/runtime/params.h"
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#include "ompi/communicator/communicator.h"
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#include "ompi/errhandler/errhandler.h"
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#include "ompi/datatype/ompi_datatype.h"
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#include "ompi/op/op.h"
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#include "ompi/memchecker.h"
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#if OPAL_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
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#pragma weak MPI_Reduce_scatter = PMPI_Reduce_scatter
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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_Reduce_scatter";
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int MPI_Reduce_scatter(const void *sendbuf, void *recvbuf, const int recvcounts[],
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MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)
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{
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int i, err, size, count;
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MEMCHECKER(
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int rank;
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size = ompi_comm_size(comm);
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rank = ompi_comm_rank(comm);
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for (count = i = 0; i < size; ++i) {
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if (0 == recvcounts[i]) {
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count += recvcounts[i];
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}
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}
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memchecker_comm(comm);
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memchecker_datatype(datatype);
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/* check receive buffer of current proccess, whether it's addressable. */
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memchecker_call(&opal_memchecker_base_isaddressable, recvbuf,
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recvcounts[rank], datatype);
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/* check whether the actual send buffer is defined. */
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if(MPI_IN_PLACE == sendbuf) {
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memchecker_call(&opal_memchecker_base_isdefined, recvbuf, count, datatype);
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} else {
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memchecker_call(&opal_memchecker_base_isdefined, sendbuf, count, datatype);
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}
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);
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if (MPI_PARAM_CHECK) {
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char *msg;
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err = MPI_SUCCESS;
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OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
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if (ompi_comm_invalid(comm)) {
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_COMM,
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FUNC_NAME);
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}
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/* Unrooted operation; same checks for all ranks on both
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intracommunicators and intercommunicators */
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else if (MPI_OP_NULL == op || NULL == op) {
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err = MPI_ERR_OP;
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} else if (!ompi_op_is_valid(op, datatype, &msg, FUNC_NAME)) {
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int ret = OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_OP, msg);
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free(msg);
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return ret;
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} else if (NULL == recvcounts) {
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err = MPI_ERR_COUNT;
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} else if (MPI_IN_PLACE == recvbuf) {
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err = MPI_ERR_ARG;
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}
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OMPI_ERRHANDLER_CHECK(err, comm, err, FUNC_NAME);
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/* Based on the standard each group has to provide the same total
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number of elements, so the size of the recvcounts array depends
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on the number of participants in the local group. */
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size = ompi_comm_size(comm);
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for (i = 0; i < size; ++i) {
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OMPI_CHECK_DATATYPE_FOR_SEND(err, datatype, recvcounts[i]);
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OMPI_ERRHANDLER_CHECK(err, comm, err, FUNC_NAME);
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}
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}
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/* MPI-1, p114, says that each process must supply at least one
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element. But at least the Pallas benchmarks call MPI_REDUCE
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with a count of 0. So be sure to handle it. Grrr... */
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size = ompi_comm_size(comm);
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for (count = i = 0; i < size; ++i) {
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if (0 == recvcounts[i]) {
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++count;
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}
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}
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if (size == count) {
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return MPI_SUCCESS;
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}
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OPAL_CR_ENTER_LIBRARY();
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/* Invoke the coll component to perform the back-end operation */
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OBJ_RETAIN(op);
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/* XXX -- CONST -- do not cast away const -- update mca/coll */
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err = comm->c_coll.coll_reduce_scatter((void *) sendbuf, recvbuf, (int *) recvcounts,
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datatype, op, comm,
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comm->c_coll.coll_reduce_scatter_module);
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OBJ_RELEASE(op);
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OMPI_ERRHANDLER_RETURN(err, comm, err, FUNC_NAME);
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}
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