2004-01-30 00:42:40 +03:00
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/*
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2004-11-22 04:38:40 +03:00
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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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2004-11-28 23:09:25 +03:00
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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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2005-03-24 15:43:37 +03:00
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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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2004-11-22 04:38:40 +03:00
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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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2004-10-15 23:31:47 +04:00
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* $HEADER$
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2004-01-30 00:42:40 +03:00
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*/
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2004-06-07 19:33:53 +04:00
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#include "ompi_config.h"
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2004-01-30 00:42:40 +03:00
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#include <stdio.h>
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#include "mpi.h"
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2005-05-20 03:57:56 +04:00
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#include "datatype/datatype.h"
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2004-03-17 21:45:16 +03:00
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#include "mpi/c/bindings.h"
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2004-06-29 04:02:25 +04:00
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#include "mca/coll/coll.h"
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#include "errhandler/errhandler.h"
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#include "communicator/communicator.h"
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#include "op/op.h"
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2004-01-30 00:42:40 +03:00
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2004-06-07 19:33:53 +04:00
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#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
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2004-01-30 00:42:40 +03:00
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#pragma weak MPI_Scan = PMPI_Scan
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#endif
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2004-06-07 19:33:53 +04:00
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#if OMPI_PROFILING_DEFINES
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2004-04-20 22:50:43 +04:00
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#include "mpi/c/profile/defines.h"
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#endif
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2004-07-30 06:58:53 +04:00
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static const char FUNC_NAME[] = "MPI_Scan";
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2004-06-29 04:02:25 +04:00
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2004-01-30 00:42:40 +03:00
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int MPI_Scan(void *sendbuf, void *recvbuf, int count,
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2004-06-29 04:02:25 +04:00
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MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)
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{
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int err;
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if (MPI_PARAM_CHECK) {
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2004-07-30 23:14:55 +04:00
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err = MPI_SUCCESS;
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2004-06-29 04:02:25 +04:00
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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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/* No intercommunicators allowed! (MPI does not define
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MPI_SCAN on intercommunicators) */
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2004-07-30 23:14:55 +04:00
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else if (OMPI_COMM_IS_INTER(comm)) {
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err = MPI_ERR_COMM;
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2004-06-29 04:02:25 +04:00
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}
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/* Unrooted operation; checks for all ranks */
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2004-07-30 23:14:55 +04:00
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else if (MPI_OP_NULL == op) {
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err = MPI_ERR_OP;
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} else if (ompi_op_is_intrinsic(op) &&
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datatype->id < DT_MAX_PREDEFINED &&
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-1 == ompi_op_ddt_map[datatype->id]) {
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err = MPI_ERR_OP;
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} else {
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OMPI_CHECK_DATATYPE_FOR_SEND(err, datatype, count);
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2004-06-29 04:02:25 +04:00
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}
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2004-07-30 23:14:55 +04:00
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OMPI_ERRHANDLER_CHECK(err, comm, err, FUNC_NAME);
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2004-06-29 04:02:25 +04:00
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}
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2004-10-04 23:25:40 +04:00
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/* If everyone supplied count == 0, we can just return */
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if (0 == count) {
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return MPI_SUCCESS;
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}
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2004-06-29 04:02:25 +04:00
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/* Call the coll component to actually perform the allgather */
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err = comm->c_coll.coll_scan(sendbuf, recvbuf, count,
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datatype, op, comm);
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OMPI_ERRHANDLER_RETURN(err, comm, err, FUNC_NAME);
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2004-01-30 00:42:40 +03:00
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}
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