/usr/include/asio/time_traits.hpp is in libasio-dev 1.4.1-3ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// time_traits.hpp
// ~~~~~~~~~~~~~~~
//
// 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)
//
#ifndef ASIO_TIME_TRAITS_HPP
#define ASIO_TIME_TRAITS_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include "asio/detail/push_options.hpp"
#include "asio/detail/socket_types.hpp" // Must come before posix_time.
#include "asio/detail/push_options.hpp"
#include <boost/date_time/posix_time/posix_time_types.hpp>
#include "asio/detail/pop_options.hpp"
namespace asio {
/// Time traits suitable for use with the deadline timer.
template <typename Time>
struct time_traits;
/// Time traits specialised for posix_time.
template <>
struct time_traits<boost::posix_time::ptime>
{
/// The time type.
typedef boost::posix_time::ptime time_type;
/// The duration type.
typedef boost::posix_time::time_duration duration_type;
/// Get the current time.
static time_type now()
{
return boost::posix_time::microsec_clock::universal_time();
}
/// Add a duration to a time.
static time_type add(const time_type& t, const duration_type& d)
{
return t + d;
}
/// Subtract one time from another.
static duration_type subtract(const time_type& t1, const time_type& t2)
{
return 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 d;
}
};
} // namespace asio
#include "asio/detail/pop_options.hpp"
#endif // ASIO_TIME_TRAITS_HPP
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