C++ ACE_Message_Block::next方法代码示例

int
ACE::HTBP::Session::flush_outbound_queue (void)
{
  int result = 0;
  if (this->outbound_queue_.message_count() > 0)
    {
      ACE_Message_Block *msg = 0;
      iovec *iov = 0;
      ACE_NEW_RETURN (iov,
                      iovec[this->outbound_queue_.message_count()],
                      -1);
      ACE_Auto_Array_Ptr<iovec> guard (iov);
      this->outbound_queue_.peek_dequeue_head (msg);
      for (size_t i = 0; i < this->outbound_queue_.message_count(); i++)
        {
          iov[i].iov_base = msg->rd_ptr();
          iov[i].iov_len = msg->length();
          msg = msg->next();
        }
      if (this->outbound_->state() ==  ACE::HTBP::Channel::Wait_For_Ack)
        this->outbound_->recv_ack();
      result = this->outbound_->sendv (iov,this->outbound_queue_.message_count(),0);
      while (this->outbound_queue_.message_count ())
        {
          this->outbound_queue_.dequeue_head (msg);
          msg->release ();
        }
    }
  return result;
}

int
Counting_Test_Producer::svc (void)
{
  // Going to produce a lot of blocks. Since we don't necessarily want them
  // all consumed, there's no arrangement with the consumer to be sure that
  // the same number produced will be consumed; the test check will compare
  // the number produced, consumed, and remaining to be sure it ends up
  // correct.
  // Also, to be sure there's not just 1 producer and 1 consumer pinging
  // back and forth, make the producers randomly delay between blocks.
  ACE_OS::srand (static_cast<unsigned int> (ACE_OS::time ()));
  int multiple = ACE_OS::rand () % 10;
  int delay_ms = (ACE_OS::rand () % 10) / 2;
  // The delay usually causes the test to time out in the automated
  // regression testing. I just left it here in case it's needed someday.
  delay_ms = 0;
  long count = MESSAGE_FACTOR * (multiple ? multiple : 1);
  long produced = 0;
  // Some of the threads enqueue single blocks, others sequences.
  long lsequence = ++(this->sequence_);
  int seq = static_cast<int> (lsequence);
  ACE_DEBUG ((LM_DEBUG,
              ACE_TEXT ("(%t) Producer will enqueue %B blocks in seq of %d, ")
              ACE_TEXT ("%d msec delay\n"),
              (size_t)count,
              seq,
              delay_ms));

  ACE_Message_Block *first = 0, *prev = 0, *b = 0;
  ACE_Time_Value delay (0, delay_ms);
  ACE_Time_Value timeout (10);
  while (produced < count)
    {
      ACE_NEW_NORETURN (b, ACE_Message_Block (1));
      if (b == 0)
        {
          ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("(%t) Producer out of memory\n")));
          break;
        }
      first = b;
      prev = first;
      for (int s = 1; s < seq; ++s)
        {
          ACE_NEW_NORETURN (b, ACE_Message_Block (1));
          if (b == 0)
            break;
          prev->next (b);
          b->prev (prev);
          prev = b;
        }
      if (b == 0)
        {
          if (first != b)
            {
              while (first->next () != 0)
                {
                  b = first->next ();
                  first->release ();
                  first = b;
                }
              first->release ();
            }
          ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("(%t) Producer out of memory\n")));
          break;
        }
      // To be sure we can keep going on slow or completed consumers, but not
      // delay excessively if the consumers have stopped, limit the time
      // spent waiting to 10 seconds.
      ACE_Time_Value block = ACE_OS::gettimeofday ();
      block += timeout;
      if (this->putq (first, &block) == -1)
        {
          ACE_DEBUG ((LM_DEBUG,
                      ACE_TEXT ("(%t) Producer cannot putq; giving up\n")));
          while (first->next () != 0)
            {
              b = first->next ();
              first->release ();
              first = b;
            }
          first->release ();
          break;
        }
      produced += seq;
      if (delay_ms)
        ACE_OS::sleep (delay);
    }
  this->produced_ += produced;
  ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("(%t) Producer done\n")));
  return 0;
}