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138 lines
4.6 KiB
138 lines
4.6 KiB
// 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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// TODO: |
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// |
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// * Add BOOST_NOEXCEPT where applicable |
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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() { start(); } |
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// observers |
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bool is_stopped() const { return m_is_stopped; } |
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cpu_times elapsed() const; // 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(); |
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void stop(); |
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void resume(); |
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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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