/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */

/*

 *

 *  (C) 2003 by Argonne National Laboratory.

 *      See COPYRIGHT in top-level directory.

 */

#include "mpi.h"

#include <stdio.h>

#include "mpitest.h"

/*

static char MTEST_Descrip[] = "Accumulate/Replace with Fence";

*/

int main(int argc, char *argv[])

{

    int errs = 0, err;

    int rank, size, source, dest;

    int minsize = 2, count;

    MPI_Comm comm;

    MPI_Win win;

    MPI_Aint extent, lb;

    MTestDatatype sendtype, recvtype;

    MTest_Init(&argc, &argv);

    /* The following illustrates the use of the routines to

     * run through a selection of communicators and datatypes.

     * Use subsets of these for tests that do not involve combinations

     * of communicators, datatypes, and counts of datatypes */

    while (MTestGetIntracommGeneral(&comm, minsize, 1)) {

        if (comm == MPI_COMM_NULL)

            continue;

        /* Determine the sender and receiver */

        MPI_Comm_rank(comm, &rank;;

        MPI_Comm_size(comm, &size);

        source = 0;

        dest = size - 1;

        MTEST_DATATYPE_FOR_EACH_COUNT(count) {

            while (MTestGetDatatypes(&sendtype, &recvtype, count)) {

                /* Make sure that everyone has a recv buffer */

                recvtype.InitBuf(&recvtype);

                MPI_Type_extent(recvtype.datatype, &extent);

                MPI_Type_lb(recvtype.datatype, &lb);

                MPI_Win_create(recvtype.buf, recvtype.count * extent + lb,

                               (int) extent, MPI_INFO_NULL, comm, &win);

                MPI_Win_fence(0, win);

                if (rank == source) {

                    sendtype.InitBuf(&sendtype);

                    /* To improve reporting of problems about operations, we

                     * change the error handler to errors return */

                    MPI_Win_set_errhandler(win, MPI_ERRORS_RETURN);

                    /* MPI_REPLACE on accumulate is almost the same

                     * as MPI_Put; the only difference is in the

                     * handling of overlapping accumulate operations,

                     * which are not tested here */

                    err = MPI_Accumulate(sendtype.buf, sendtype.count,

                                         sendtype.datatype, dest, 0,

                                         recvtype.count, recvtype.datatype, MPI_REPLACE, win);

                    if (err) {

                        errs++;

                        if (errs < 10) {

                            printf("Accumulate types: send %s, recv %s\n",

                                   MTestGetDatatypeName(&sendtype),

                                   MTestGetDatatypeName(&recvtype));

                            MTestPrintError(err);

                        }

                    }

                    err = MPI_Win_fence(0, win);

                    if (err) {

                        errs++;

                        if (errs < 10) {

                            MTestPrintError(err);

                        }

                    }

                }

                else if (rank == dest) {

                    MPI_Win_fence(0, win);

                    /* This should have the same effect, in terms of

                     * transfering data, as a send/recv pair */

                    err = MTestCheckRecv(0, &recvtype);

                    if (err) {

                        errs += err;

                    }

                }

                else {

                    MPI_Win_fence(0, win);

                }

                MPI_Win_free(&win);

                MTestFreeDatatype(&sendtype);

                MTestFreeDatatype(&recvtype);

            }

        }

        MTestFreeComm(&comm);

    }

    MTest_Finalize(errs);

    MPI_Finalize();

    return 0;

}