/* -*- 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"

#include <stdlib.h>

#include "mpicolltest.h"

/*

static char MTEST_Descrip[] = "";

*/

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

{

    int errs = 0;

    int rank, size;

    int minsize = 2, count;

    MPI_Comm comm;

    int *sendbuf, *recvbuf, *p;

    int sendcount, recvcount;

    int i, j;

    MPI_Datatype 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);

        /* printf("Size of comm = %d\n", size); */

        for (count = 1; count < 65000; count = count * 2) {

            /* Create a send buf and a receive buf suitable for testing

             * all to all.  */

            sendcount = count;

            recvcount = count;

            sendbuf = (int *) malloc(count * size * sizeof(int));

            recvbuf = (int *) malloc(count * size * sizeof(int));

            sendtype = MPI_INT;

            recvtype = MPI_INT;

            if (!sendbuf || !recvbuf) {

                errs++;

                fprintf(stderr, "Failed to allocate sendbuf and/or recvbuf\n");

                MPI_Abort(MPI_COMM_WORLD, 1);

            }

            for (i = 0; i < count * size; i++)

                recvbuf[i] = -1;

            p = sendbuf;

            for (j = 0; j < size; j++) {

                for (i = 0; i < count; i++) {

                    *p++ = j * size + rank + i;

                }

            }

            MTest_Alltoall(sendbuf, sendcount, sendtype, recvbuf, recvcount, recvtype, comm);

            p = recvbuf;

            for (j = 0; j < size; j++) {

                for (i = 0; i < count; i++) {

                    if (*p != rank * size + j + i) {

                        errs++;

                        if (errs < 10) {

                            fprintf(stderr, "Error with communicator %s and size=%d count=%d\n",

                                    MTestGetIntracommName(), size, count);

                            fprintf(stderr, "recvbuf[%d,%d] = %d, should be %d\n",

                                    j, i, *p, rank * size + j + i);

                        }

                    }

                    p++;

                }

            }

#if MTEST_HAVE_MIN_MPI_VERSION(2,2)

            /* check MPI_IN_PLACE, added in MPI-2.2 */

            p = recvbuf;

            for (j = 0; j < size; j++) {

                for (i = 0; i < count; i++) {

                    *p++ = j * size + rank + i;

                }

            }

            MPI_Alltoall(MPI_IN_PLACE, -1 /*ignored */ , MPI_DATATYPE_NULL /*ignored */ ,

                         recvbuf, recvcount, recvtype, comm);

            p = recvbuf;

            for (j = 0; j < size; j++) {

                for (i = 0; i < count; i++) {

                    if (*p != rank * size + j + i) {

                        errs++;

                        if (errs < 10) {

                            fprintf(stderr,

                                    "Error (MPI_IN_PLACE) with communicator %s and size=%d count=%d\n",

                                    MTestGetIntracommName(), size, count);

                            fprintf(stderr, "recvbuf[%d,%d] = %d, should be %d\n", j, i, *p,

                                    rank * size + j + i);

                        }

                    }

                    p++;

                }

            }

#endif

            free(recvbuf);

            free(sendbuf);

        }

        MTestFreeComm(&comm);

    }

    MTest_Finalize(errs);

    return MTestReturnValue(errs);

}