2004-01-20 09:12:28 +03:00
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/*
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2007-03-17 02:11:45 +03:00
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* Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
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2005-11-05 22:57:48 +03:00
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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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2008-02-12 11:46:27 +03:00
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* Copyright (c) 2004-2008 High Performance Computing Center Stuttgart,
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2004-11-28 23:09:25 +03:00
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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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2009-01-11 05:30:00 +03:00
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* Copyright (c) 2007 Cisco Systems, Inc. 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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2004-01-20 09:12:28 +03:00
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* $HEADER$
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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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2004-01-20 09:12:28 +03:00
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#include <stdio.h>
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2006-02-12 04:33:29 +03:00
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#include "ompi/mpi/c/bindings.h"
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2009-04-29 05:32:14 +04:00
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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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2005-09-12 13:17:44 +04:00
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#include "ompi/datatype/datatype.h"
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2008-02-12 21:01:17 +03:00
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#include "ompi/memchecker.h"
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2004-01-20 09:12:28 +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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2004-01-20 09:12:28 +03:00
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#pragma weak MPI_Allgather = PMPI_Allgather
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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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2006-02-12 04:33:29 +03:00
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#include "ompi/mpi/c/profile/defines.h"
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2004-04-20 22:50:43 +04:00
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#endif
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2004-06-24 20:47:00 +04:00
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static const char FUNC_NAME[] = "MPI_Allgather";
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2004-01-20 09:12:28 +03:00
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2004-06-29 04:02:25 +04:00
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2004-01-20 09:12:28 +03:00
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int MPI_Allgather(void *sendbuf, int sendcount, MPI_Datatype sendtype,
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2008-02-12 11:46:27 +03:00
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void *recvbuf, int recvcount, MPI_Datatype recvtype,
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MPI_Comm comm)
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2004-05-08 03:44:49 +04:00
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{
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int err;
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2008-02-20 01:15:52 +03:00
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2008-02-12 11:46:27 +03:00
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MEMCHECKER(
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2008-11-27 19:34:02 +03:00
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int rank;
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ptrdiff_t ext;
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2008-12-03 20:44:21 +03:00
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2008-11-27 19:34:02 +03:00
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rank = ompi_comm_rank(comm);
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ompi_ddt_type_extent(recvtype, &ext);
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2008-02-12 11:46:27 +03:00
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memchecker_datatype(recvtype);
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memchecker_comm(comm);
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2008-11-27 19:34:02 +03:00
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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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2008-12-03 20:44:21 +03:00
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memchecker_call(&opal_memchecker_base_isdefined,
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(char *)(recvbuf)+rank*ext,
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recvcount, recvtype);
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2008-11-27 19:34:02 +03:00
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} else {
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memchecker_datatype(sendtype);
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memchecker_call(&opal_memchecker_base_isdefined, sendbuf, sendcount, sendtype);
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}
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/* check whether the receive buffer is addressable. */
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memchecker_call(&opal_memchecker_base_isaddressable, recvbuf, recvcount, recvtype);
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2008-02-12 11:46:27 +03:00
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);
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2007-03-17 02:11:45 +03:00
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2004-05-08 03:44:49 +04:00
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if (MPI_PARAM_CHECK) {
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2004-06-29 04:02:25 +04:00
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/* Unrooted operation -- same checks for all ranks on both
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intracommunicators and intercommunicators */
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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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2005-09-13 21:07:03 +04:00
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if (ompi_comm_invalid(comm)) {
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2004-07-30 23:14:55 +04:00
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OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_COMM, FUNC_NAME);
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2007-03-21 14:10:42 +03:00
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} else if (MPI_DATATYPE_NULL == recvtype || NULL == recvtype) {
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2004-07-30 23:14:55 +04:00
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err = MPI_ERR_TYPE;
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} else if (recvcount < 0) {
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err = MPI_ERR_COUNT;
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2005-09-13 21:07:03 +04:00
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} else if (MPI_IN_PLACE == recvbuf) {
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return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_ARG, FUNC_NAME);
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2005-09-13 23:15:01 +04:00
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} else if (MPI_IN_PLACE != sendbuf) {
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OMPI_CHECK_DATATYPE_FOR_SEND(err, sendtype, sendcount);
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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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2004-05-08 03:44:49 +04:00
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}
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2006-09-30 02:49:04 +04:00
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/* Do we need to do anything? Everyone had to give the same send
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signature, which means that everyone must have given a
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sendcount > 0 if there's anything to send. If we're doing
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IN_PLACE, however, check recvcount, not sendcount. */
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2004-09-30 19:56:08 +04:00
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2006-09-30 02:49:04 +04:00
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if ((MPI_IN_PLACE != sendbuf && 0 == sendcount) ||
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(0 == recvcount)) {
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return MPI_SUCCESS;
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2004-09-30 19:56:08 +04:00
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}
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2008-02-20 01:15:52 +03:00
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OPAL_CR_ENTER_LIBRARY();
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2004-06-29 04:02:25 +04:00
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/* Invoke the coll component to perform the back-end operation */
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2004-05-08 03:44:49 +04:00
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2004-06-29 04:02:25 +04:00
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err = comm->c_coll.coll_allgather(sendbuf, sendcount, sendtype,
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2007-08-19 07:37:49 +04:00
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recvbuf, recvcount, recvtype, comm,
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comm->c_coll.coll_allgather_module);
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2004-06-29 04:02:25 +04:00
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OMPI_ERRHANDLER_RETURN(err, comm, err, FUNC_NAME);
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2004-01-20 09:12:28 +03:00
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}
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