/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
 *
 *  (C) 2003 by Argonne National Laboratory.
 *      See COPYRIGHT in top-level directory.
 */
#include <stdio.h>
#include "mpi.h"
#include "mpitest.h"

/* Test bsend with a buffer with arbitray alignment */
#define BUFSIZE 2000*4
int main(int argc, char *argv[])
{
    MPI_Status status;
    int a[10], b[10];
    int align;
    char buf[BUFSIZE + 8], *bptr;
    int bl, i, j, rank, size;
    int errs = 0;

    MTest_Init(0, 0);
    MPI_Comm_rank(MPI_COMM_WORLD, &rank);
    MPI_Comm_size(MPI_COMM_WORLD, &size);
    for (align = 0; align < 7; align++) {
        MPI_Buffer_attach(buf + align, BUFSIZE);

        for (j = 0; j < 10; j++) {
            for (i = 0; i < 10; i++) {
                a[i] = (rank + 10 * j) * size + i;
            }
            MPI_Bsend(a, 10, MPI_INT, 0, 27 + j, MPI_COMM_WORLD);
        }
        if (rank == 0) {

            for (i = 0; i < size; i++) {
                for (j = 0; j < 10; j++) {
                    int k;
                    status.MPI_TAG = -10;
                    status.MPI_SOURCE = -20;
                    MPI_Recv(b, 10, MPI_INT, i, 27 + j, MPI_COMM_WORLD, &status);

                    if (status.MPI_TAG != 27 + j) {
                        errs++;
                        printf("Wrong tag = %d\n", status.MPI_TAG);
                    }
                    if (status.MPI_SOURCE != i) {
                        errs++;
                        printf("Wrong source = %d\n", status.MPI_SOURCE);
                    }
                    for (k = 0; k < 10; k++) {
                        if (b[k] != (i + 10 * j) * size + k) {
                            errs++;
                            printf("(Align=%d) received b[%d] = %d (expected %d) from %d tag %d\n",
                                   align, k, b[k], (i + 10 * j), i, 27 + j);
                        }
                    }
                }
            }
        }
        MPI_Buffer_detach(&bptr, &bl);
        if (bptr != buf + align) {
            errs++;
            printf
                ("Did not recieve the same buffer on detach that was provided on init (%p vs %p)\n",
                 bptr, buf);
        }
    }

    MTest_Finalize(errs);
    MPI_Finalize();
    return 0;
}
