doc/html/boost_asio/example/timers/time_t_timer.cpp
//
// time_t_timer.cpp
// ~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2008 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#include <boost/asio.hpp>
#include <ctime>
#include <iostream>
struct time_t_traits
{
// The time type.
typedef std::time_t time_type;
// The duration type.
struct duration_type
{
duration_type() : value(0) {}
duration_type(std::time_t v) : value(v) {}
std::time_t value;
};
// Get the current time.
static time_type now()
{
return std::time(0);
}
// Add a duration to a time.
static time_type add(const time_type& t, const duration_type& d)
{
return t + d.value;
}
// Subtract one time from another.
static duration_type subtract(const time_type& t1, const time_type& t2)
{
return duration_type(t1 - t2);
}
// Test whether one time is less than another.
static bool less_than(const time_type& t1, const time_type& t2)
{
return t1 < t2;
}
// Convert to POSIX duration type.
static boost::posix_time::time_duration to_posix_duration(
const duration_type& d)
{
return boost::posix_time::seconds(d.value);
}
};
typedef boost::asio::basic_deadline_timer<
std::time_t, time_t_traits> time_t_timer;
void handle_timeout(const boost::system::error_code&)
{
std::cout << "handle_timeout\n";
}
int main()
{
try
{
boost::asio::io_service io_service;
time_t_timer timer(io_service);
timer.expires_from_now(5);
std::cout << "Starting synchronous wait\n";
timer.wait();
std::cout << "Finished synchronous wait\n";
timer.expires_from_now(5);
std::cout << "Starting asynchronous wait\n";
timer.async_wait(handle_timeout);
io_service.run();
std::cout << "Finished asynchronous wait\n";
}
catch (std::exception& e)
{
std::cout << "Exception: " << e.what() << "\n";
}
return 0;
}