63 lines
1.8 KiB
C++
63 lines
1.8 KiB
C++
// boost/chrono/timer.hpp ------------------------------------------------------------//
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// Copyright Beman Dawes 2008
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// Copyright 2009 Vicente J. Botet Escriba
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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// See http://www.boost.org/libs/system for documentation.
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#ifndef BOOSTEX_CHRONO_TIMER_HPP
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#define BOOSTEX_CHRONO_TIMER_HPP
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#include <boost/chrono/chrono.hpp>
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#include <boost/system/error_code.hpp>
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namespace boost_ex
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{
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namespace chrono
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{
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//--------------------------------------------------------------------------------------//
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// timer //
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//--------------------------------------------------------------------------------------//
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template <class Clock=boost::chrono::high_resolution_clock>
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class timer
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{
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public:
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typedef Clock clock;
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typedef typename Clock::duration duration;
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typedef typename Clock::time_point time_point;
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explicit timer( boost::system::error_code & ec = ::boost::throws() )
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{
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start(ec);
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}
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~timer() {} // never throws
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void start( boost::system::error_code & ec = ::boost::throws() )
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{
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m_start = clock::now( ec );
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}
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duration elapsed( boost::system::error_code & ec = ::boost::throws() )
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{ return clock::now( ec ) - m_start; }
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private:
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time_point m_start;
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};
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typedef chrono::timer< boost::chrono::system_clock > system_timer;
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#ifdef BOOST_CHRONO_HAS_CLOCK_STEADY
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typedef chrono::timer< boost::chrono::steady_clock > steady_timer;
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#endif
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typedef chrono::timer< boost::chrono::high_resolution_clock > high_resolution_timer;
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} // namespace chrono
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} // namespace boost_ex
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#endif
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