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/*
 *  Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de)
 *
 *  COPYRIGHT (c) 1989-2012.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.org/license/LICENSE.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <string.h>
#include <time.h>

#include <rtems/test.h>
#include <rtems/simple-test.h>

const char rtems_test_name[] = "PSXINTRCRITICAL 1";

typedef struct {
  timer_t           timer;
  struct itimerspec spec;
  volatile bool early;
  volatile bool late;
  long early_count;
  long late_count;
  long potential_hits;
} test_context;

#define POSIX_TIMER_RELATIVE 0

static void prepare(void *arg)
{
  test_context *ctx;

  ctx = arg;
  ctx->early = false;
  ctx->late = false;
}

static void action(void *arg)
{
  test_context *ctx;
  int rv;

  ctx = arg;
  ctx->early = true;
  rv = timer_settime(ctx->timer, POSIX_TIMER_RELATIVE, &ctx->spec, NULL);
  ctx->late = true;
  T_quiet_psx_success(rv);

  while (T_interrupt_test_get_state() == T_INTERRUPT_TEST_ACTION) {
    /* Wait */
  }
}

static T_interrupt_test_state interrupt(void *arg)
{
  test_context *ctx;
  T_interrupt_test_state state;
  int rv;

  state = T_interrupt_test_get_state();

  if (state != T_INTERRUPT_TEST_ACTION) {
    return T_INTERRUPT_TEST_EARLY;
  }

  ctx = arg;
  rv = timer_settime(ctx->timer, POSIX_TIMER_RELATIVE, &ctx->spec, NULL);
  T_quiet_psx_success(rv);

  if (ctx->late) {
    ++ctx->late_count;
    return T_INTERRUPT_TEST_LATE;
  } else if (ctx->early) {
    ++ctx->early_count;
    return T_INTERRUPT_TEST_EARLY;
  } else {
    ++ctx->potential_hits;

    if (ctx->potential_hits > 13) {
      return T_INTERRUPT_TEST_DONE;
    } else {
      return T_INTERRUPT_TEST_CONTINUE;
    }
  }
}

static const T_interrupt_test_config config = {
  .prepare = prepare,
  .action = action,
  .interrupt = interrupt,
  .max_iteration_count = 10000
};

T_TEST_CASE(PSXSetTimerInterrupt)
{
  test_context ctx;
  int sc;
  T_interrupt_test_state state;

  memset(&ctx, 0, sizeof(ctx));

  /* create POSIX Timer */
  sc = timer_create (CLOCK_REALTIME, NULL, &ctx.timer);
  T_psx_success(sc);

  /* we don't care if it ever fires */
  ctx.spec.it_interval.tv_sec  = 10;
  ctx.spec.it_value.tv_sec     = 10;

  state = T_interrupt_test(&config, &ctx);
  T_eq_int(state, T_INTERRUPT_TEST_DONE);

  T_log(T_NORMAL, "early count = %ld", ctx.early_count);
  T_log(T_NORMAL, "late count = %ld", ctx.late_count);
  T_log(T_NORMAL, "potential hits = %ld", ctx.potential_hits);
  T_gt_int(ctx.potential_hits, 0);

  sc = timer_delete(ctx.timer);
  T_psx_success(sc);
}

static rtems_task Init(rtems_task_argument arg)
{
  rtems_test_run(arg, TEST_STATE);
}

/* configuration information */

#define CONFIGURE_APPLICATION_NEEDS_SIMPLE_CONSOLE_DRIVER
#define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER

#define CONFIGURE_MAXIMUM_TASKS          1
#define CONFIGURE_MAXIMUM_POSIX_TIMERS   1
#define CONFIGURE_MICROSECONDS_PER_TICK  1000
#define CONFIGURE_INITIAL_EXTENSIONS RTEMS_TEST_INITIAL_EXTENSION

#define CONFIGURE_RTEMS_INIT_TASKS_TABLE

#define CONFIGURE_INIT
#include <rtems/confdefs.h>

/* global variables */