/* -*- 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 <stdlib.h>
#include <string.h>
#include "mpitest.h"

/*
static char MTEST_Descrip[] = "RMA to self";
*/

int main(int argc, char *argv[])
{
    int errs = 0;
    int rank, size, i, j;
    MPI_Comm comm;
    MPI_Win win;
    int *winbuf, count;
    int *sbuf, scount, vcount;
    MPI_Datatype vectype;

    MTest_Init(&argc, &argv);

    comm = MPI_COMM_WORLD;

    MPI_Comm_rank(comm, &rank);
    MPI_Comm_size(comm, &size);

    /* Allocate and initialize sbuf */
    scount = 1000;
    count = 1000;
    sbuf = (int *) malloc(scount * sizeof(int));
    if (!sbuf) {
        fprintf(stderr, "Could not allocate send buffer f size %d\n", scount);
        MPI_Abort(MPI_COMM_WORLD, 0);
    }
    for (i = 0; i < scount; i++)
        sbuf[i] = i;

    MPI_Alloc_mem(count * sizeof(int), MPI_INFO_NULL, &winbuf);

    /* This is a simple vector type */
    vcount = count / 4;
    MPI_Type_vector(vcount, 1, 2, MPI_INT, &vectype);
    MPI_Type_commit(&vectype);
    MPI_Win_create(winbuf, count * sizeof(int), sizeof(int), MPI_INFO_NULL, comm, &win);

    /* Check with different combination of types, including non-contig on
     * both sides */

    /* Clear winbuf */
    memset(winbuf, 0, count * sizeof(int));
    MPI_Win_lock(MPI_LOCK_EXCLUSIVE, rank, 0, win);
    MPI_Put(sbuf, 1, vectype, rank, 0, 1, vectype, win);
    MPI_Win_unlock(rank, win);
    /* Check results */
    j = 0;
    for (i = 0; i < vcount; i++) {
        if (winbuf[j] != sbuf[j]) {
            errs++;
            fprintf(stderr, "VecPut: winbuf[%d] = %d, should = %d\n", j, winbuf[j], sbuf[j]);
        }
        j += 2;
    }

    memset(winbuf, 0, count * sizeof(int));
    MPI_Win_lock(MPI_LOCK_SHARED, rank, 0, win);
    MPI_Accumulate(sbuf, 1, vectype, rank, 0, 1, vectype, MPI_SUM, win);
    MPI_Win_unlock(rank, win);
    /* Check results */
    j = 0;
    for (i = 0; i < vcount; i++) {
        if (winbuf[j] != sbuf[j]) {
            errs++;
            fprintf(stderr, "VecAcc: winbuf[%d] = %d, should = %d\n", j, winbuf[j], sbuf[j]);
        }
        j += 2;
    }

    /* Now, use get to fetch back the results that we just wrote */
    memset(sbuf, 0, count * sizeof(int));
    MPI_Win_lock(MPI_LOCK_SHARED, rank, 0, win);
    MPI_Get(sbuf, 1, vectype, rank, 0, 1, vectype, win);
    MPI_Win_unlock(rank, win);
    /* Check results */
    j = 0;
    for (i = 0; i < vcount; i++) {
        if (winbuf[j] != sbuf[j]) {
            errs++;
            fprintf(stderr, "VecAcc: winbuf[%d] = %d, should = %d\n", j, winbuf[j], sbuf[j]);
        }
        j += 2;
    }

    MPI_Win_free(&win);
    MPI_Free_mem(winbuf);
    free(sbuf);
    MPI_Type_free(&vectype);

    MTest_Finalize(errs);

    return MTestReturnValue(errs);
}
