Re: [boost] asio networking proposal

From: Christopher Kohlhoff (chris_at_[hidden])
Date: 2005-08-19 06:55:28

Hi Minh,

--- Mr Minh <m_phanivong_at_[hidden]> wrote:
> how would the iostreams source/sink fit into your design

I'm not particular familiar with the Boost.Iostreams library, but it
seems that template adapters could be used to turn the Sync_Recv_Stream
concept into a Source, and a Sync_Send_Stream into a Sink. There does
not seem to be an equivalent for the async concepts though.

> and would you consider using signal/slots to handle the events.

The current design makes the callback function object (aka Handler)
type a template parameter to give maximum scope for optimisation.
However there is no reason that I can see why you can't pass a signal
to be the handler. For example:

//------------------------------
#include <boost/signal.hpp>
#include <boost/bind.hpp>
#include <asio.hpp>
#include <iostream>

void func(int value)
{
  std::cout << value << std::endl;
}

int main()
{
  boost::signal<void()> sig;
  sig.connect(boost::bind(func, 1));
  sig.connect(boost::bind(func, 2));

  asio::demuxer d;
  d.post(boost::bind(boost::ref(sig)));
  d.run();

  return 0;
}
//------------------------------

Cheers,
Chris