/* -*- 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[] = "Send-Recv";

*/

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

{

    int errs = 0, err;

    int rank, size, source, dest;

    int minsize = 2, count;

    MPI_Comm comm;

    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;

        /* To improve reporting of problems about operations, we

         * change the error handler to errors return */

        MPI_Comm_set_errhandler(comm, MPI_ERRORS_RETURN);

        MTEST_DATATYPE_FOR_EACH_COUNT(count) {

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

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

                recvtype.InitBuf(&recvtype);

                if (rank == source) {

                    sendtype.InitBuf(&sendtype);

                    err = MPI_Send(sendtype.buf, sendtype.count, sendtype.datatype, dest, 0, comm);

                    if (err) {

                        errs++;

                        if (errs < 10) {

                            MTestPrintError(err);

                        }

                    }

                }

                else if (rank == dest) {

                    err = MPI_Recv(recvtype.buf, recvtype.count,

                                   recvtype.datatype, source, 0, comm, MPI_STATUS_IGNORE);

                    if (err) {

                        errs++;

                        if (errs < 10) {

                            MTestPrintError(err);

                        }

                    }

                    err = MTestCheckRecv(0, &recvtype);

                    if (err) {

                        if (errs < 10) {

                            printf

                                ("Data in target buffer did not match for destination datatype %s and source datatype %s, count = %d\n",

                                 MTestGetDatatypeName(&recvtype), MTestGetDatatypeName(&sendtype),

                                 count);

                            recvtype.printErrors = 1;

                            (void) MTestCheckRecv(0, &recvtype);

                        }

                        errs += err;

                    }

                }

                MTestFreeDatatype(&sendtype);

                MTestFreeDatatype(&recvtype);

            }

        }

        MTestFreeComm(&comm);

    }

    MTest_Finalize(errs);

    MPI_Finalize();

    return 0;

}