/usr/include/asio/detail/timer_queue_base.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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// timer_queue_base.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_DETAIL_TIMER_QUEUE_BASE_HPP
#define ASIO_DETAIL_TIMER_QUEUE_BASE_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"
#include "asio/detail/noncopyable.hpp"
namespace asio {
namespace detail {
class timer_queue_base
: private noncopyable
{
public:
// Destructor.
virtual ~timer_queue_base() {}
// Whether there are no timers in the queue.
virtual bool empty() const = 0;
// Get the time to wait until the next timer.
virtual boost::posix_time::time_duration wait_duration() const = 0;
// Dispatch all ready timers.
virtual void dispatch_timers() = 0;
// Dispatch any pending cancels for timers.
virtual void dispatch_cancellations() = 0;
// Complete all timers that are waiting to be completed.
virtual void complete_timers() = 0;
// Destroy all timers.
virtual void destroy_timers() = 0;
};
} // namespace detail
} // namespace asio
#include "asio/detail/pop_options.hpp"
#endif // ASIO_DETAIL_TIMER_QUEUE_BASE_HPP
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