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

/*

 *  (C) 2001 by Argonne National Laboratory.

 *      See COPYRIGHT in top-level directory.

 */

#include "mpi.h"

#include "stdio.h"

#include "stdlib.h"

#include "mpitest.h"

/* This is a modified version of test4.c. Sent by Liwei Peng, Microsoft. */

/* tests passive target RMA on 3 processes. tests the lock-single_op-unlock

   optimization. */

#define SIZE1 100

#define SIZE2 200

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

{

    int rank, nprocs, A[SIZE2], B[SIZE2], i;

    MPI_Comm CommThree;

    MPI_Win win;

    int errs = 0;

    int trank = 1;

    MTest_Init(&argc, &argv);

    MPI_Comm_size(MPI_COMM_WORLD, &nprocs);

    MPI_Comm_rank(MPI_COMM_WORLD, &rank;;

    if (nprocs < 3) {

        fprintf(stderr, "Run this program with 3 or more processes\n");

        MPI_Abort(MPI_COMM_WORLD, 1);

    }

    MPI_Comm_split(MPI_COMM_WORLD, (rank < 3), rank, &CommThree);

    if (rank < 3) {

        if (rank == 0) {

            for (i = 0; i < SIZE2; i++) {

                A[i] = B[i] = i;

            }

        }

        else if (rank == 2) {

            for (i = 0; i < SIZE2; i++) {

                A[i] = B[i] = -1;

            }

        }

        else if (rank == 1) {

            for (i = 0; i < SIZE2; i++) {

                B[i] = (-4) * i;

            }

        }

        MPI_Win_create(B, SIZE2 * sizeof(int), sizeof(int), MPI_INFO_NULL, CommThree, &win);

        if (rank == 0) {

            for (i = 0; i < SIZE1; i++) {

                MPI_Win_lock(MPI_LOCK_EXCLUSIVE, trank, 0, win);

                MPI_Put(A + i, 1, MPI_INT, trank, i, 1, MPI_INT, win);

                /*  MPI_Put(A+i, 1, MPI_INT, trank, i, 1, MPI_INT, win);

                 * MPI_Put(A+i, 1, MPI_INT, trank, i, 1, MPI_INT, win); */

                MPI_Win_unlock(trank, win);

            }

            MPI_Win_free(&win);

        }

        else if (rank == 2) {

            for (i = 0; i < SIZE1; i++) {

                MPI_Win_lock(MPI_LOCK_EXCLUSIVE, trank, 0, win);

                MPI_Get(A + i, 1, MPI_INT, trank, SIZE1 + i, 1, MPI_INT, win);

                MPI_Win_unlock(trank, win);

            }

            MPI_Win_free(&win);

            for (i = 0; i < SIZE1; i++)

                if (A[i] != (-4) * (i + SIZE1)) {

                    printf("Get Error: A[%d] is %d, should be %d\n", i, A[i], (-4) * (i + SIZE1));

                    errs++;

                }

        }

        else if (rank == 1) {   /*target */

            MPI_Win_free(&win);

            for (i = 0; i < SIZE1; i++) {

                if (B[i] != i) {

                    printf("Put Error: B[%d] is %d, should be %d\n", i, B[i], i);

                    errs++;

                }

            }

        }

    }

    MPI_Comm_free(&CommThree);

    MTest_Finalize(errs);

    MPI_Finalize();

    return 0;

}