x15/test/test_sleepq_broadcast.c

/*
 * Copyright (c) 2019 Richard Braun.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *
 * This test creates a number of threads (at least 2) which wait on a
 * sleep queue, and one that broadcasts the sleep queue after making
 * sure all waiters are sleeping.
 */

#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>

#include <kern/error.h>
#include <kern/init.h>
#include <kern/log.h>
#include <kern/sleepq.h>
#include <kern/thread.h>
#include <test/test.h>

#define TEST_NR_WAITERS   2

#if TEST_NR_WAITERS < 2
  #error "invalid number of waiters"
#endif

static uint32_t test_dummy_sync_obj;
static struct thread *test_waiters[TEST_NR_WAITERS];

static void
test_wait (void *arg __unused)
{
  struct sleepq *sleepq = sleepq_lend (&test_dummy_sync_obj, false);
  sleepq_wait (sleepq, "test");
  sleepq_return (sleepq);
}

static void
test_broadcast (void *arg __unused)
{
  for (size_t i = 0; i < ARRAY_SIZE (test_waiters); i++)
    while (thread_state (test_waiters[i]) != THREAD_SLEEPING)
      thread_delay (1, false);

  struct sleepq *sleepq = sleepq_acquire (&test_dummy_sync_obj, false);
  if (! sleepq)
    panic ("test: unable to acquire sleep queue");

  sleepq_broadcast (sleepq);
  sleepq_release (sleepq);

  for (size_t i = 0; i < ARRAY_SIZE (test_waiters); i++)
    thread_join (test_waiters[i]);

  log_info ("test (sleepq_broadcast): done");
}

TEST_INLINE (sleepq_broadcast)
{
  struct thread_attr attr;
  int error;

  for (size_t i = 0; i < ARRAY_SIZE (test_waiters); i++)
    {
      char name[THREAD_NAME_SIZE];
      snprintf (name, sizeof (name), THREAD_KERNEL_PREFIX "test_wait:%zu", i);
      thread_attr_init (&attr, name);
      error = thread_create (&test_waiters[i], &attr, test_wait, NULL);
      error_check (error, "thread_create");
    }

  thread_attr_init (&attr, THREAD_KERNEL_PREFIX "test_broadcast");
  thread_attr_set_detached (&attr);
  error = thread_create (NULL, &attr, test_broadcast, NULL);
  error_check (error, "thread_create");

  return (TEST_RUNNING);
}