C++ ACE_Pipe类代码示例

static int
setup_unnamed_pipe (ACE_Process_Options &opt)
{
  // Create an unnamed pipe instance.
  ACE_Pipe pipe;

  // Check if the pipe is created successfully.
  if (pipe.open () == -1)
    ACE_ERROR_RETURN ((LM_ERROR, "%p\n", "pipe.open"), -1);

  // Setting up pipe between parent and child process.  Use the pipe
  // as child process'es ACE_STDIN.  ACE_Process_Options will keep
  // copies (by dup) of fd's that we pass in.  Notice that we have to
  // specify child process to use ACE_STDOUT for output explicitly
  // because we'll close it down in the line after.  Child process
  // will use whatever we use to dup2 ACE_STDOUT as its stdout.
  opt.set_handles (pipe.read_handle (), ACE_STDOUT);

  // The previous keep a copy of original ACE_STDOUT fd, now we
  // can replace ACE_STDOUT of parent process to the pipe.
  ACE_OS::dup2 (pipe.write_handle (), ACE_STDOUT);

  // Don't forget to close the unused fd.
  pipe.close ();
  return 0;
}

int
ACE_TMAIN (int argc, ACE_TCHAR *argv[])
{
  if (argc != 2)
    ACE_ERROR_RETURN ((LM_ERROR,
                       ACE_TEXT ("usage: pingpong <string>\n")),
                       -1);

  ACE_LOG_MSG->open (argv[0]);

  string_name = argv[1];

  ACE_HANDLE handles[2];

  //FUZZ: disable check_for_lack_ACE_OS
  // Create a pipe and initialize the handles.
  ACE_Pipe pipe (handles);
  //FUZZ: enable check_for_lack_ACE_OS

#if defined (ACE_WIN32) || defined (CHORUS)
  if (ACE_Thread::spawn (ACE_THR_FUNC (worker),
                         (void *) handles[0],
                         THR_DETACHED) == -1
      || ACE_Thread::spawn (ACE_THR_FUNC (worker),
                            (void *) handles[1],
                            THR_DETACHED) == -1)
      ACE_ERROR ((LM_ERROR,
                  ACE_TEXT ("%p\n%a"),
                  ACE_TEXT ("spawn"),
                  1));
  barrier.wait ();
#else
  pid_t pid = ACE_OS::fork (argv[0]);

  if (pid == -1)
    ACE_ERROR ((LM_ERROR,
                ACE_TEXT ("%p\n%a"),
                ACE_TEXT ("fork"),
                1));
  run_svc (handles[pid == 0]);

  ACE_DEBUG ((LM_DEBUG,
              ACE_TEXT ("(%P|%t) %n: shutting down tester\n")));
#endif /* ACE_WIN32 */

  if (pipe.close () == -1)
    ACE_ERROR ((LM_ERROR,
                ACE_TEXT ("%p\n"),
                ACE_TEXT ("close")));
  return 0;
}

static void
open_pipe (ACE_Pipe &pipe,
           const char *name)
{
    ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("opening %C\n"), name));
    int result = pipe.open ();

    ACE_TEST_ASSERT (result != -1);
    result = pipe.read_handle () != ACE_INVALID_HANDLE
             && pipe.write_handle () != ACE_INVALID_HANDLE;
    ACE_TEST_ASSERT (result == 1);

    if (close_pipe)
        pipe.close ();
}

// Write some data to the pipe.  This will cause handle_input to get
// called.
void
write_to_pipe (ACE_Pipe &pipe)
{
  char *data = "hello";
  size_t len = ACE_OS::strlen (data);

  ssize_t result = ACE::send (pipe.write_handle (),
                              data,
                              len);
  ACE_ASSERT ((size_t)result == len);
  ACE_UNUSED_ARG (result);
}

  ACE_HANDLE Socket_Impl::
    get_handle_ ()
    {
      if (signal_pipe_.read_handle () == ACE_INVALID_HANDLE)
        {
          signal_pipe_.open ();
        }

      return signal_pipe_.read_handle ();
    }

  void Socket_Impl::recv (Message_ptr m)
    {
      if (m->find (Data::id) != 0 || m->find (NoData::id) != 0)
        {
          if (!loop_)
            {
              Address to (static_cast<To const*> (m->find (To::id))->address ());

              Address from (
                            static_cast<From const*> (m->find (From::id))->address ());

              if (to == from)
                return;
            }

          Lock l (mutex_);

          //if (queue_.size () != 0)
          //  cerr << "recv socket queue size: " << queue_.size () << endl;

          //FUZZ: disable check_for_lack_ACE_OS
          bool signal (queue_.is_empty ());
          //FUZZ: enable check_for_lack_ACE_OS

          queue_.enqueue_tail (m);

          if (signal)
            {
              // Also write to the pipe.
              if (signal_pipe_.write_handle () != ACE_INVALID_HANDLE)
                {
                  char c;

                  if (signal_pipe_.send (&c, 1) != 1)
                    {
                      // perror ("write: ");
                      ACE_OS::abort ();
                    }
                }

              cond_.signal ();
            }
        }
    }

int Handler::open(ACE_Reactor * r)
{
    if(-1 == the_pipe_.open(handles_))
    {
      return -1;
    }
    if(-1 == r->register_handler(this, ACE_Event_Handler::READ_MASK))
    {
      return -1;
    }
    return 0;
}

  ssize_t Socket_Impl::
    recv_ (void* buf,
           size_t s,
           ACE_Time_Value const* timeout,
           ACE_INET_Addr* from)
    {
      ACE_Time_Value abs_time;

      if (timeout)
        abs_time = ACE_OS::gettimeofday () + *timeout;

      Lock l (mutex_);

      while (queue_.is_empty ())
        {
          if (timeout)
            {
              if (cond_.wait (&abs_time) != -1)
                break;
            }
          else
            {
              if (cond_.wait () != -1)
                break;
            }

          return -1; // errno is already set
        }


      Message_ptr m;

      if (queue_.dequeue_head (m) == -1)
        ACE_OS::abort ();


      if (queue_.is_empty ())
        {
          // Remove data from the pipe.
          //
          if (signal_pipe_.read_handle () != ACE_INVALID_HANDLE)
            {
              char c;

              if (signal_pipe_.recv (&c, 1) != 1)
                {
                  ACE_OS::perror ("read: ");
                  ACE_OS::abort ();
                }
            }
        }

      if (from)
        *from = static_cast<From const*> (m->find (From::id))->address ();

      if (m->find (NoData::id) != 0)
        {
          errno = ENOENT;
          return -1;
        }

      Data const* d = static_cast<Data const*>(m->find (Data::id));

      ssize_t r (static_cast<ssize_t> (d->size () < s ? d->size () : s));

      ACE_OS::memcpy (buf, d->buf (), r);

      return r;
    }

ACE_HANDLE
Handler::get_handle() const
{
  return the_pipe_.read_handle ();
}

void
Handler::send_dummy_data()
{
  char buf[] = "dummy";
  (void) the_pipe_.send (buf, sizeof (buf));
}