133 lines
4.7 KiB
C++
133 lines
4.7 KiB
C++
// boost/timer/timer.hpp -------------------------------------------------------------//
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// Copyright Beman Dawes 1994-2007, 2011
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// Distributed under the Boost Software License, Version 1.0.
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// See http://www.boost.org/LICENSE_1_0.txt
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#ifndef BOOST_TIMER_TIMER_HPP
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#define BOOST_TIMER_TIMER_HPP
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#include <boost/config/warning_disable.hpp>
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#include <boost/timer/config.hpp>
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//#include <boost/chrono/chrono.hpp>
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#include <boost/cstdint.hpp>
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#include <string>
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#include <cstring>
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#include <ostream>
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#include <boost/config/abi_prefix.hpp> // must be the last #include
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# if defined(_MSC_VER)
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# pragma warning(push) // Save warning settings
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# pragma warning(disable : 4251) // disable warning: class 'std::basic_string<_Elem,_Traits,_Ax>'
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# endif // needs to have dll-interface...
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//--------------------------------------------------------------------------------------//
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namespace boost
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{
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namespace timer
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{
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class cpu_timer;
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class auto_cpu_timer;
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typedef boost::int_least64_t nanosecond_type;
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struct cpu_times
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{
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nanosecond_type wall;
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nanosecond_type user;
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nanosecond_type system;
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void clear() { wall = user = system = 0LL; }
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};
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const short default_places = 6;
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BOOST_TIMER_DECL
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std::string format(const cpu_times& times, short places, const std::string& format);
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BOOST_TIMER_DECL
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std::string format(const cpu_times& times, short places = default_places);
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// cpu_timer -------------------------------------------------------------------------//
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class BOOST_TIMER_DECL cpu_timer
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{
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public:
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// constructor
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cpu_timer() BOOST_NOEXCEPT { start(); }
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// observers
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bool is_stopped() const BOOST_NOEXCEPT { return m_is_stopped; }
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cpu_times elapsed() const BOOST_NOEXCEPT; // does not stop()
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std::string format(short places, const std::string& format) const
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{ return ::boost::timer::format(elapsed(), places, format); }
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std::string format(short places = default_places) const
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{ return ::boost::timer::format(elapsed(), places); }
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// actions
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void start() BOOST_NOEXCEPT;
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void stop() BOOST_NOEXCEPT;
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void resume() BOOST_NOEXCEPT;
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private:
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cpu_times m_times;
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bool m_is_stopped;
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};
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// auto_cpu_timer --------------------------------------------------------------------//
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class BOOST_TIMER_DECL auto_cpu_timer : public cpu_timer
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{
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public:
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// Explicit defaults for os are not provided to avoid including <iostream>, which has
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// high costs even when the standard streams are not actually used. Explicit defaults
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// for format are not provided to avoid order-of-dynamic-initialization issues with a
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// std::string.
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explicit auto_cpu_timer(short places = default_places); // #1
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auto_cpu_timer(short places, const std::string& format); // #2
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explicit auto_cpu_timer(const std::string& format); // #3
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auto_cpu_timer(std::ostream& os, short places,
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const std::string& format) // #4
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: m_places(places), m_os(&os), m_format(format)
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{ start(); }
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explicit auto_cpu_timer(std::ostream& os, short places = default_places); // #5
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auto_cpu_timer(std::ostream& os, const std::string& format) // #6
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: m_places(default_places), m_os(&os), m_format(format)
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{ start(); }
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~auto_cpu_timer();
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// observers
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// not particularly useful to users, but allow testing of constructor
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// postconditions and ease specification of other functionality without resorting
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// to "for exposition only" private members.
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std::ostream& ostream() const { return *m_os; }
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short places() const { return m_places; }
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const std::string& format_string() const { return m_format; }
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// actions
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void report();
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private:
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short m_places;
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std::ostream* m_os; // stored as ptr so compiler can generate operator=
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std::string m_format;
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};
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} // namespace timer
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} // namespace boost
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# if defined(_MSC_VER)
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# pragma warning(pop) // restore warning settings.
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# endif
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#include <boost/config/abi_suffix.hpp> // pops abi_prefix.hpp pragmas
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#endif // BOOST_TIMER_TIMER_HPP
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