/*
 *  asio-bug1.cpp
 *  Created by Andrew Kargalov on 14/12/2011.
 
 
 Expected behavior: print 2 lines and exit.
 Real behavior with boost 1.48: hang.
 
 Stack trace on hang:
 
 0   libSystem.B.dylib             	0x91177b42 semaphore_wait_signal_trap + 10
 1   libSystem.B.dylib             	0x9117d646 pthread_mutex_lock + 490
 2   asio-bug1                     	0x00002218 boost::asio::detail::posix_mutex::lock() + 18 (posix_mutex.hpp:52)
 3   asio-bug1                     	0x000027fc boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>::scoped_lock(boost::asio::detail::posix_mutex&) + 44 (scoped_lock.hpp:36)
 4   asio-bug1                     	0x00004177 boost::asio::detail::task_io_service::post_deferred_completions(boost::asio::detail::op_queue<boost::asio::detail::task_io_service_operation>&) + 117 (task_io_service.ipp:308)
 5   asio-bug1                     	0x0000a9f9 boost::asio::detail::signal_set_service::deliver_signal(int) + 231 (signal_set_service.ipp:458)
 6   asio-bug1                     	0x0000aaab boost::asio::detail::signal_set_service::pipe_read_op::do_perform(boost::asio::detail::reactor_op*) + 59 (signal_set_service.ipp:95)
 7   asio-bug1                     	0x00008f4e boost::asio::detail::reactor_op::perform() + 20 (reactor_op.hpp:40)
 8   asio-bug1                     	0x0000e164 void boost::asio::detail::reactor_op_queue<int>::perform_operations_for_descriptors<boost::asio::detail::posix_fd_set_adapter>(boost::asio::detail::posix_fd_set_adapter const&, boost::asio::detail::op_queue<boost::asio::detail::task_io_service_operation>&) + 142 (reactor_op_queue.hpp:149)
 9   asio-bug1                     	0x0000e506 boost::asio::detail::select_reactor::run(bool, boost::asio::detail::op_queue<boost::asio::detail::task_io_service_operation>&) + 768 (select_reactor.ipp:238)
 10  asio-bug1                     	0x0000e678 boost::asio::detail::task_io_service::do_run_one(boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>&, boost::asio::detail::task_io_service::thread_info&, boost::asio::detail::op_queue<boost::asio::detail::task_io_service_operation>&, boost::system::error_code const&) + 274 (task_io_service.ipp:350)
 
 */

#include <iostream>
#include <signal.h>

#include <boost/asio.hpp>

boost::asio::io_service io;
boost::asio::signal_set ss(io, SIGUSR1);
boost::asio::deadline_timer dt(io);

void timer_callback(const boost::system::error_code& ec)
{
    if(!ec) std::cout << "timer fired" << std::endl;
}

void signal_callback2(const boost::system::error_code& ec, int signo)
{
    std::cout << "2: signal " << signo << " received" << std::endl;
}

void signal_callback1(const boost::system::error_code& ec, int signo)
{    
    std::cout << "1: signal " << signo << " received" << std::endl;
    ss.async_wait(signal_callback2);
    raise(SIGUSR1);
    dt.cancel(); // <-- hang up point
}

int main (int argc, char * const argv[]) 
{
    ss.async_wait(signal_callback1);    
    dt.expires_from_now(boost::posix_time::seconds(1));
    dt.async_wait(timer_callback);
    
    raise(SIGUSR1);
    io.run();
    
    return 0;
}