Re: [Boost-users] [asio] deadline_timer callback is not called

Subject: Re: [Boost-users] [asio] deadline_timer callback is not called
From: Daniele Barzotti (daniele.barzotti_at_[hidden])
Date: 2009-10-14 11:02:40

Igor R ha scritto:
>> io_service.run();
> Put some debug message here, to see when the io_service::run ends.

Hi Igor,
thanks for you reply.

I've put some debug code:

---------------------- START CODE ------------------------

void io_worker_thread(void)
{
  io_service.run();
  std::cout << ">>>> io_service.run() TERMINATED! <<<<" << endl;
};
---------------------- END CODE ------------------------

And the io_service.run() never returns, neither at the end of the
application.
This was caused because I had declared the io_service::work* like a
shared_ptr.

I change its declaration to simply:

static boost::asio::io_service::work*   p_work;

And now io_service.run() ends only at the application end.
So, when I call the timer, the io_service should run!!

I try to add a call to io_service.run() after the timer async_wait:

---------------------- START CODE ------------------------
{
  .....
  //Start a new timer or renew it
  rx_timer_.expires_from_now( boost::posix_time::milliseconds( 2000 ) );

  // We managed to cancel the timer. Start new asynchronous wait.
  rx_timer_.async_wait(
      boost::bind(&WaveStream::handle_timeout, this, _1) );

  io_service.run();
  std::cout << "io_service.run() called " << endl;
}

void WaveStream::handle_timeout(const boost::system::error_code& error)
{
  std::cout << "BOOST TIMER RAISED!!" << endl;
};

---------------------- END CODE ------------------------

..and in this manner the callback is called immediately after the
io_service.run() without waiting and in output I see:

BOOST TIMER RAISED!!
io_service.run() called
BOOST TIMER RAISED!!
io_service.run() called
BOOST TIMER RAISED!!
io_service.run() called
BOOST TIMER RAISED!!
io_service.run() called
BOOST TIMER RAISED!!

Suggestions?
Daniele.