/*
 *  Copyright (c) 2017 Intel Corporation. All rights reserved.
 *  This software is available to you under the BSD license below:
 *
 *      Redistribution and use in source and binary forms, with or
 *      without modification, are permitted provided that the following
 *      conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <inttypes.h>
#include <stdint.h>
#include <stdio.h>

#include <rocshmem/rocshmem.hpp>

using namespace rocshmem;

#define NELEM 10

/* Note: Need to alternate psync arrays because the active set changes */

int main(void) {
  int i, me, npes;
  int errors = 0;
  long *bcast_psync;
  // long *barrier_psync0, *barrier_psync1;
  long long *src, *dst;

  rocshmem_init();

  me = rocshmem_my_pe();
  npes = rocshmem_n_pes();

  src = (long long *)rocshmem_malloc(NELEM * sizeof(long long));
  dst = (long long *)rocshmem_malloc(NELEM * sizeof(long long));
  for (i = 0; i < NELEM; i++) {
    src[i] = me;
    dst[i] = -1;
  }

  bcast_psync =
      (long *)rocshmem_malloc(ROCSHMEM_BCAST_SYNC_SIZE * sizeof(long));
  for (i = 0; i < ROCSHMEM_BCAST_SYNC_SIZE; i++)
    bcast_psync[i] = ROCSHMEM_SYNC_VALUE;

  /*
  barrier_psync0 = (long *) rocshmem_malloc(ROCSHMEM_BCAST_SYNC_SIZE *
  sizeof(long)); barrier_psync1 = (long *)
  rocshmem_malloc(ROCSHMEM_BCAST_SYNC_SIZE * sizeof(long)); for (i = 0; i <
  ROCSHMEM_BARRIER_SYNC_SIZE; i++) { barrier_psync0[i] = ROCSHMEM_SYNC_VALUE;
      barrier_psync1[i] = ROCSHMEM_SYNC_VALUE;
  }
  */

  if (me == 0) printf("Shrinking active set test\n");

  rocshmem_barrier_all();

  /* A total of npes tests are performed, where the active set in each test
   * includes PEs i..npes-1 */
  for (i = 0; i <= me; i++) {
    int j;

    if (me == i) printf(" + active set size %d\n", npes - i);

    rocshmem_ctx_longlong_broadcast(ROCSHMEM_CTX_DEFAULT, dst, src, NELEM, 0,
                                     i, 0, npes - i, bcast_psync);

    /* Validate broadcasted data */
    for (j = 0; j < NELEM; j++) {
      long long expected = (me == i) ? i - 1 : i;
      if (dst[j] != expected) {
        printf(
            "%d: Expected dst[%d] = %lld, got dst[%d] = %lld, iteration %d\n",
            me, j, expected, j, dst[j], i);
        errors++;
      }
    }

    // rocshmem_barrier(i, 0, npes-i, (i % 2) ? barrier_psync0 :
    // barrier_psync1);
  }

  rocshmem_barrier_all();

  for (i = 0; i < NELEM; i++) dst[i] = -1;

  if (me == 0) printf("Changing root test\n");

  rocshmem_barrier_all();

  /* A total of npes tests are performed, where the root changes each time */
  for (i = 0; i < npes; i++) {
    int j;

    if (me == i) printf(" + root %d\n", i);

    rocshmem_ctx_longlong_broadcast(ROCSHMEM_CTX_DEFAULT, dst, src, NELEM, i,
                                     0, 0, npes, bcast_psync);

    /* Validate broadcasted data */
    for (j = 0; j < NELEM; j++) {
      long long expected = (me == i) ? i - 1 : i;
      if (dst[j] != expected) {
        printf(
            "%d: Expected dst[%d] = %lld, got dst[%d] = %lld, iteration %d\n",
            me, j, expected, j, dst[j], i);
        errors++;
      }
    }

    // rocshmem_barrier(0, 0, npes, barrier_psync0);
  }

  rocshmem_free(src);
  rocshmem_free(dst);

  rocshmem_free(bcast_psync);

  rocshmem_finalize();

  return errors != 0;
}