1 // 2 // steady_timer.hpp 3 // ~~~~~~~~~~~~~~~~ 4 // 5 // Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com) 6 // 7 // Distributed under the Boost Software License, Version 1.0. (See accompanying 8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 9 // 10 11 #ifndef ASIO_STEADY_TIMER_HPP 12 #define ASIO_STEADY_TIMER_HPP 13 14 #if defined(_MSC_VER) && (_MSC_VER >= 1200) 15 # pragma once 16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) 17 18 #include "asio/detail/config.hpp" 19 20 #if defined(ASIO_HAS_CHRONO) || defined(GENERATING_DOCUMENTATION) 21 22 #include "asio/basic_waitable_timer.hpp" 23 #include "asio/detail/chrono.hpp" 24 25 namespace asio { 26 27 /// Typedef for a timer based on the steady clock. 28 /** 29 * This typedef uses the C++11 @c <chrono> standard library facility, if 30 * available. Otherwise, it may use the Boost.Chrono library. To explicitly 31 * utilise Boost.Chrono, use the basic_waitable_timer template directly: 32 * @code 33 * typedef basic_waitable_timer<boost::chrono::steady_clock> timer; 34 * @endcode 35 */ 36 typedef basic_waitable_timer<chrono::steady_clock> steady_timer; 37 38 } // namespace asio 39 40 #endif // defined(ASIO_HAS_CHRONO) || defined(GENERATING_DOCUMENTATION) 41 42 #endif // ASIO_STEADY_TIMER_HPP 43