112 строки
3.6 KiB
C
112 строки
3.6 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
|
|
/*
|
|
* Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
|
|
* University Research and Technology
|
|
* Corporation. All rights reserved.
|
|
* Copyright (c) 2004-2005 The University of Tennessee and The University
|
|
* of Tennessee Research Foundation. All rights
|
|
* reserved.
|
|
* Copyright (c) 2004-2008 High Performance Computing Center Stuttgart,
|
|
* University of Stuttgart. All rights reserved.
|
|
* Copyright (c) 2004-2005 The Regents of the University of California.
|
|
* All rights reserved.
|
|
* Copyright (c) 2006 Cisco Systems, Inc. All rights reserved.
|
|
* Copyright (c) 2013 Los Alamos National Security, LLC. All rights
|
|
* reserved.
|
|
* Copyright (c) 2015 Research Organization for Information Science
|
|
* and Technology (RIST). All rights reserved.
|
|
* $COPYRIGHT$
|
|
*
|
|
* Additional copyrights may follow
|
|
*
|
|
* $HEADER$
|
|
*/
|
|
#include "ompi_config.h"
|
|
#include <stdio.h>
|
|
|
|
#include "ompi/mpi/c/bindings.h"
|
|
#include "ompi/runtime/params.h"
|
|
#include "ompi/communicator/communicator.h"
|
|
#include "ompi/errhandler/errhandler.h"
|
|
#include "ompi/datatype/ompi_datatype.h"
|
|
#include "ompi/op/op.h"
|
|
#include "ompi/memchecker.h"
|
|
|
|
#if OPAL_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
|
|
#pragma weak MPI_Scan = PMPI_Scan
|
|
#endif
|
|
|
|
#if OMPI_PROFILING_DEFINES
|
|
#include "ompi/mpi/c/profile/defines.h"
|
|
#endif
|
|
|
|
static const char FUNC_NAME[] = "MPI_Scan";
|
|
|
|
|
|
int MPI_Scan(const void *sendbuf, void *recvbuf, int count,
|
|
MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)
|
|
{
|
|
int err;
|
|
|
|
MEMCHECKER(
|
|
memchecker_datatype(datatype);
|
|
memchecker_comm(comm);
|
|
if (MPI_IN_PLACE != sendbuf) {
|
|
memchecker_call(&opal_memchecker_base_isdefined, sendbuf, count, datatype);
|
|
} else {
|
|
memchecker_call(&opal_memchecker_base_isdefined, recvbuf, count, datatype);
|
|
}
|
|
);
|
|
|
|
if (MPI_PARAM_CHECK) {
|
|
char *msg;
|
|
err = MPI_SUCCESS;
|
|
OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
|
|
if (ompi_comm_invalid(comm)) {
|
|
return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_COMM,
|
|
FUNC_NAME);
|
|
}
|
|
|
|
/* No intercommunicators allowed! (MPI does not define
|
|
MPI_SCAN on intercommunicators) */
|
|
|
|
else if (OMPI_COMM_IS_INTER(comm)) {
|
|
err = MPI_ERR_COMM;
|
|
}
|
|
|
|
/* Unrooted operation; checks for all ranks */
|
|
|
|
else if (MPI_OP_NULL == op || NULL == op) {
|
|
err = MPI_ERR_OP;
|
|
} else if (MPI_IN_PLACE == recvbuf) {
|
|
err = MPI_ERR_ARG;
|
|
} else if (!ompi_op_is_valid(op, datatype, &msg, FUNC_NAME)) {
|
|
int ret = OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_OP, msg);
|
|
free(msg);
|
|
return ret;
|
|
} else {
|
|
OMPI_CHECK_DATATYPE_FOR_SEND(err, datatype, count);
|
|
}
|
|
OMPI_ERRHANDLER_CHECK(err, comm, err, FUNC_NAME);
|
|
}
|
|
|
|
/* Do we need to do anything? (MPI says that reductions have to
|
|
have a count of at least 1, but at least IMB calls reduce with
|
|
a count of 0 -- blah!) */
|
|
|
|
if (0 == count) {
|
|
return MPI_SUCCESS;
|
|
}
|
|
|
|
OPAL_CR_ENTER_LIBRARY();
|
|
|
|
/* Call the coll component to actually perform the allgather */
|
|
|
|
OBJ_RETAIN(op);
|
|
err = comm->c_coll.coll_scan(sendbuf, recvbuf, count,
|
|
datatype, op, comm,
|
|
comm->c_coll.coll_scan_module);
|
|
OBJ_RELEASE(op);
|
|
OMPI_ERRHANDLER_RETURN(err, comm, err, FUNC_NAME);
|
|
}
|