/*
 * Copyright (c) 2016 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "svm_fifo_segment.h"

clib_error_t *
hello_world (int verbose)
{
  svm_fifo_segment_create_args_t _a, *a = &_a;
  svm_fifo_segment_private_t *sp;
  svm_fifo_t *f;
  int rv;
  u8 *test_data;
  u8 *retrieved_data = 0;
  clib_error_t *error = 0;

  memset (a, 0, sizeof (*a));

  a->segment_name = "fifo-test1";
  a->segment_size = 256 << 10;
  a->rx_fifo_size = 4096;
  a->tx_fifo_size = 4096;
  a->preallocated_fifo_pairs = 4;

  rv = svm_fifo_segment_create (a);

  if (rv)
    return clib_error_return (0, "svm_fifo_segment_create returned %d", rv);

  sp = svm_fifo_segment_get_segment (a->new_segment_indices[0]);

  f = svm_fifo_segment_alloc_fifo (sp, 4096, FIFO_SEGMENT_RX_FREELIST);

  if (f == 0)
    return clib_error_return (0, "svm_fifo_segment_alloc_fifo failed");

  test_data = format (0, "Hello world%c", 0);
  vec_validate (retrieved_data, vec_len (test_data) - 1);

  while (svm_fifo_max_enqueue (f) >= vec_len (test_data))
    svm_fifo_enqueue_nowait (f, vec_len (test_data), test_data);

  while (svm_fifo_max_dequeue (f) >= vec_len (test_data))
    svm_fifo_dequeue_nowait (f, vec_len (retrieved_data), retrieved_data);

  while (svm_fifo_max_enqueue (f) >= vec_len (test_data))
    svm_fifo_enqueue_nowait (f, vec_len (test_data), test_data);

  while (svm_fifo_max_dequeue (f) >= vec_len (test_data))
    svm_fifo_dequeue_nowait (f, vec_len (retrieved_data), retrieved_data);

  if (!memcmp (retrieved_data, test_data, vec_len (test_data)))
    error = clib_error_return (0, "data test OK, got '%s'", retrieved_data);
  else
    error = clib_error_return (0, "data test FAIL!");

  svm_fifo_segment_free_fifo (sp, f, FIFO_SEGMENT_RX_FREELIST);

  return error;
}

clib_error_t *
master (int verbose)
{
  svm_fifo_segment_create_args_t _a, *a = &_a;
  svm_fifo_segment_private_t *sp;
  svm_fifo_t *f;
  int rv;
  u8 *test_data;
  u8 *retrieved_data = 0;
  int i;

  memset (a, 0, sizeof (*a));

  a->segment_name = "fifo-test1";
  a->segment_size = 256 << 10;

  rv = svm_fifo_segment_create (a);

  if (rv)
    return clib_error_return (0, "svm_fifo_segment_create returned %d", rv);

  sp = svm_fifo_segment_get_segment (a->new_segment_indices[0]);

  f = svm_fifo_segment_alloc_fifo (sp, 4096, FIFO_SEGMENT_RX_FREELIST);

  if (f == 0)
    return clib_error_return (0, "svm_fifo_segment_alloc_fifo failed");

  test_data = format (0, "Hello world%c", 0);
  vec_validate (retrieved_data, vec_len (test_data) - 1);

  for (i = 0; i < 1000; i++)
    svm_fifo_enqueue_nowait (f, vec_len (test_data), test_data);

  return clib_error_return (0, "master (enqueue) done");
}

clib_error_t *
mempig (int verbose)
{
  svm_fifo_segment_create_args_t _a, *a = &_a;
  svm_fifo_segment_private_t *sp;
  svm_fifo_t *f;
  svm_fifo_t **flist = 0;
  int rv;
  int i;

  memset (a, 0, sizeof (*a));

  a->segment_name = "fifo-test1";
  a->segment_size = 256 << 10;

  rv = svm_fifo_segment_create (a);

  if (rv)
    return clib_error_return (0, "svm_fifo_segment_create returned %d", rv);

  sp = svm_fifo_segment_get_segment (a->new_segment_indices[0]);

  for (i = 0; i < 1000; i++)
    {
      f = svm_fifo_segment_alloc_fifo (sp, 4096, FIFO_SEGMENT_RX_FREELIST);
      if (f == 0)
	break;
      vec_add1 (flist, f);
    }

  fformat (stdout, "Try #1: created %d fifos...\n", vec_len (flist));
  for (i = 0; i < vec_len (flist); i++)
    {
      f = flist[i];
      svm_fifo_segment_free_fifo (sp, f, FIFO_SEGMENT_RX_FREELIST);
    }

  _vec_len (flist) = 0;

  for (i = 0; i < 1000; i++)
    {
      f = svm_fifo_segment_alloc_fifo (sp, 4096, FIFO_SEGMENT_RX_FREELIST);
      if (f == 0)
	break;
      vec_add1 (flist, f);
    }

  fformat (stdout, "Try #2: created %d fifos...\n", vec_len (flist));
  for (i = 0; i < vec_len (flist); i++)
    {
      f = flist[i];
      svm_fifo_segment_free_fifo (sp, f, FIFO_SEGMENT_RX_FREELIST);
    }

  return 0;
}

clib_error_t *
offset (int verbose)
{
  svm_fifo_segment_create_args_t _a, *a = &_a;
  svm_fifo_segment_private_t *sp;
  svm_fifo_t *f;
  int rv;
  u32 *test_data = 0;
  u32 *recovered_data = 0;
  int i;

  memset (a, 0, sizeof (*a));

  a->segment_name = "fifo-test1";
  a->segment_size = 256 << 10;

  rv = svm_fifo_segment_create (a);

  if (rv)
    return clib_error_return (0, "svm_fifo_segment_create returned %d", rv);

  sp = svm_fifo_segment_get_segment (a->new_segment_indices[0]);

  f = svm_fifo_segment_alloc_fifo (sp, 200 << 10, FIFO_SEGMENT_RX_FREELIST);

  if (f == 0)
    return clib_error_return (0, "svm_fifo_segment_alloc_fifo failed");

  for (i = 0; i < (3 * 1024); i++)
    vec_add1 (test_data, i);

  /* Enqueue the first 1024 u32's */
  svm_fifo_enqueue_nowait (f, 4096 /* bytes to enqueue */ ,
			   (u8 *) test_data);

  /* Enqueue the third 1024 u32's 2048 ahead of the current tail */
  svm_fifo_enqueue_with_offset (f, 4096, 4096, (u8 *) & test_data[2048]);

  /* Enqueue the second 1024 u32's at the current tail */
  svm_fifo_enqueue_nowait (f, 4096 /* bytes to enqueue */ ,
			   (u8 *) & test_data[1024]);

  vec_validate (recovered_data, (3 * 1024) - 1);

  svm_fifo_dequeue_nowait (f, 3 * 4096, (u8 *) recovered_data);

  for (i = 0; i < (3 * 1024); i++)
    {
      if (recovered_data[i] != test_data[i])
	{
	  clib_warning ("[%d] expected %d recovered %d", i,
			test_data[i], recovered_data[i]);
	  return clib_error_return (0, "offset test FAILED");
	}
    }

  return clib_error_return (0, "offset test OK");
}

clib_error_t *
slave (int verbose)
{
  svm_fifo_segment_create_args_t _a, *a = &_a;
  svm_fifo_segment_private_t *sp;
  svm_fifo_t *f;
  ssvm_shared_header_t *sh;
  svm_fifo_segment_header_t *fsh;
  int rv;
  u8 *test_data;
  u8 *retrieved_data = 0;
  int i;

  memset (a, 0, sizeof (*a));

  a->segment_name = "fifo-test1";

  rv = svm_fifo_segment_attach (a);

  if (rv)
    return clib_error_return (0, "svm_fifo_segment_attach returned %d", rv);

  sp = svm_fifo_segment_get_segment (a->new_segment_indices[0]);
  sh = sp->ssvm.sh;
  fsh = (svm_fifo_segment_header_t *) sh->opaque[0];

  /* might wanna wait.. */
  f = fsh->fifos;

  /* Lazy bastards united */
  test_data = format (0, "Hello world%c", 0);
  vec_validate (retrieved_data, vec_len (test_data) - 1);

  for (i = 0; i < 1000; i++)
    {
      svm_fifo_dequeue_nowait (f, vec_len (retrieved_data), retrieved_data);
      if (memcmp (retrieved_data, test_data, vec_len (retrieved_data)))
	return clib_error_return (0, "retrieved data incorrect, '%s'",
				  retrieved_data);
    }

  return clib_error_return (0, "slave (dequeue) done");
}


int
test_ssvm_fifo1 (unformat_input_t * input)
{
  clib_error_t *error = 0;
  int verbose = 0;
  int test_id = 0;

  svm_fifo_segment_init (0x200000000ULL, 20);

  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
    {
      if (unformat (input, "verbose %d", &verbose))
	;
      else if (unformat (input, "verbose"))
	verbose = 1;
      else if (unformat (input, "master"))
	test_id = 1;
      else if (unformat (input, "slave"))
	test_id = 2;
      else if (unformat (input, "mempig"))
	test_id = 3;
      else if (unformat (input, "offset"))
	test_id = 4;
      else
	{
	  error = clib_error_create ("unknown input `%U'\n",
				     format_unformat_error, input);
	  goto out;
	}
    }

  switch (test_id)
    {
    case 0:
      error = hello_world (verbose);
      break;

    case 1:
      error = master (verbose);
      break;

    case 2:
      error = slave (verbose);
      break;

    case 3:
      error = mempig (verbose);
      break;

    case 4:
      error = offset (verbose);
      break;

    default:
      error = clib_error_return (0, "test id %d unknown", test_id);
      break;
    }

out:
  if (error)
    clib_error_report (error);

  return 0;
}


int
main (int argc, char *argv[])
{
  unformat_input_t i;
  int r;

  unformat_init_command_line (&i, argv);
  r = test_ssvm_fifo1 (&i);
  unformat_free (&i);
  return r;
}

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */