151 строка
5.1 KiB
C
151 строка
5.1 KiB
C
/*
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* Copyright (c) 2004-2005 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) 2004-2005 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) 2004-2005 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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* $COPYRIGHT$
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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 "mpi/c/bindings.h"
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#include "ompi/datatype/datatype.h"
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#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
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#pragma weak MPI_Scatterv = PMPI_Scatterv
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#endif
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#if OMPI_PROFILING_DEFINES
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#include "mpi/c/profile/defines.h"
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#endif
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static const char FUNC_NAME[] = "MPI_Scatterv";
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int MPI_Scatterv(void *sendbuf, int *sendcounts, int *displs,
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MPI_Datatype sendtype, void *recvbuf, int recvcount,
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MPI_Datatype recvtype, int root, MPI_Comm comm)
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{
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int i, size, err;
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if (MPI_PARAM_CHECK) {
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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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} else if ((ompi_comm_rank(comm) != root && MPI_IN_PLACE == recvbuf) ||
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MPI_IN_PLACE == sendbuf) {
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return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_ARG, FUNC_NAME);
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}
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/* Errors for intracommunicators */
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if (OMPI_COMM_IS_INTRA(comm)) {
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/* Errors for all ranks */
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if ((root >= ompi_comm_size(comm)) || (root < 0)) {
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return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_ROOT, FUNC_NAME);
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}
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if (MPI_IN_PLACE != recvbuf) {
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if (recvcount < 0) {
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return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_COUNT,
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FUNC_NAME);
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}
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if (MPI_DATATYPE_NULL == recvtype) {
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return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_TYPE,
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FUNC_NAME);
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}
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}
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/* Errors for the root. Some of these could have been
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combined into compound if statements above, but since
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this whole section can be compiled out (or turned off at
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run time) for efficiency, it's more clear to separate
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them out into individual tests. */
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if (ompi_comm_rank(comm) == root) {
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if (NULL == displs) {
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return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_ARG, FUNC_NAME);
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}
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if (NULL == sendcounts) {
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return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_COUNT, FUNC_NAME);
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}
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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, sendtype, sendcounts[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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}
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/* Errors for intercommunicators */
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else {
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if (! ((root >= 0 && root < ompi_comm_remote_size(comm)) ||
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MPI_ROOT == root || MPI_PROC_NULL == root)) {
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return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_ROOT, FUNC_NAME);
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}
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/* Errors for the receivers */
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if (MPI_ROOT != root && MPI_PROC_NULL != root) {
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if (recvcount < 0) {
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return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_COUNT, FUNC_NAME);
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}
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if (MPI_DATATYPE_NULL == recvtype) {
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return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_TYPE, FUNC_NAME);
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}
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}
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/* Errors for the root. Ditto on the comment above -- these
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error checks could have been combined above, but let's
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make the code easier to read. */
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else if (MPI_ROOT == root) {
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if (NULL == displs) {
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return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_ARG, FUNC_NAME);
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}
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if (NULL == sendcounts) {
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return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_COUNT, FUNC_NAME);
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}
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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, sendtype, sendcounts[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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}
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}
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/* If we have nothing to do, just return */
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if (0 == recvcount && ompi_comm_rank(comm) != root) {
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return MPI_SUCCESS;
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}
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/* Invoke the coll component to perform the back-end operation */
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err = comm->c_coll.coll_scatterv(sendbuf, sendcounts, displs, sendtype,
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recvbuf, recvcount, recvtype, root, comm);
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OMPI_ERRHANDLER_RETURN(err, comm, err, FUNC_NAME);
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}
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