[boost] extending asio with unix signal handlers

Subject: [boost] extending asio with unix signal handlers
From: Dmitry Goncharov (dgoncharov_at_[hidden])
Date: 2009-03-19 04:55:27

Hi,

What do you think of extending asio with unix signal handling?
The extension lets the library user to have a handler invoked when a 
unix signal arrives.

void on_signal(boost::system::error_code const& error)
{
    if (!error)
        cout << "sigint received" << endl;
}

int main(int argc, char const* argv[])
{
    boost::asio::io_service ios;
    boost::asio::posix::signal_handler<SIGINT> sigint(ios);
    while (true)
    {
        ios.reset();
        sigint.async_wait(boost::bind(on_signal, _1));
        ios.poll();
    }
}
 
This lets the user have a unix signal handler of an arbitrary signature.
This also removes the "async-signal safe calls" restriction.

Please, find the implementation along with two examples enclosed.

BR, Dmitry