84 строки
2.6 KiB
C
84 строки
2.6 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University.
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* All rights reserved.
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* Copyright (c) 2004-2005 The Trustees of the University of Tennessee.
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* All rights 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_Alltoallv = PMPI_Alltoallv
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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_Alltoallv";
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int MPI_Alltoallv(void *sendbuf, int *sendcounts, int *sdispls,
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MPI_Datatype sendtype,
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void *recvbuf, int *recvcounts, int *rdispls,
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MPI_Datatype recvtype, 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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/* Unrooted operation -- same checks for all ranks */
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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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if ((NULL == sendcounts) || (NULL == sdispls) ||
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(NULL == recvcounts) || (NULL == rdispls) ||
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MPI_IN_PLACE == sendbuf || MPI_IN_PLACE == recvbuf) {
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return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_ARG, FUNC_NAME);
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}
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/* We always define the remote group to be the same as the local
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group in the case of an intracommunicator, so it's safe to
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get the size of the remote group here for both intra- and
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intercommunicators */
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size = ompi_comm_remote_size(comm);
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for (i = 0; i < size; ++i) {
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if (recvcounts[i] < 0) {
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err = MPI_ERR_COUNT;
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} else if (MPI_DATATYPE_NULL == recvtype) {
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err = MPI_ERR_TYPE;
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} else {
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OMPI_CHECK_DATATYPE_FOR_SEND(err, sendtype, sendcounts[i]);
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}
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OMPI_ERRHANDLER_CHECK(err, comm, err, FUNC_NAME);
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}
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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_alltoallv(sendbuf, sendcounts, sdispls, sendtype,
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recvbuf, recvcounts, rdispls, recvtype,
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comm);
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OMPI_ERRHANDLER_RETURN(err, comm, err, FUNC_NAME);
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}
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