Function wait_on_queue

mysys/mf_keycache.c:876–904

*/

static void wait_on_queue(KEYCACHE_WQUEUE *wqueue,
                          mysql_mutex_t *mutex)
{
  struct st_my_thread_var *last;
  struct st_my_thread_var *thread= my_thread_var;

  /* Add to queue. */
  DBUG_ASSERT(!thread->next);
  DBUG_ASSERT(!thread->prev); /* Not required, but must be true anyway. */
  if (! (last= wqueue->last_thread))
    thread->next= thread;
  else
  {
    thread->next= last->next;
    last->next= thread;
  }
  wqueue->last_thread= thread;

  /*
    Wait until thread is removed from queue by the signalling thread.
    The loop protects against stray signals.
  */
  do
  {
    KEYCACHE_DBUG_PRINT("wait", ("suspend thread %ld", thread->id));
    keycache_pthread_cond_wait(&thread->suspend, mutex);
  }
  while (thread->next);
}


/*