0b6a182c
 Hu Chunming
添加无鉴权注册和注销
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// boost/timer/timer.hpp -------------------------------------------------------------//
// Copyright Beman Dawes 1994-2007, 2011
// Distributed under the Boost Software License, Version 1.0.
// See http://www.boost.org/LICENSE_1_0.txt
#ifndef BOOST_TIMER_TIMER_HPP
#define BOOST_TIMER_TIMER_HPP
#include <boost/timer/config.hpp>
#include <boost/cstdint.hpp>
#include <string>
#include <cstring>
#include <ostream>
#include <boost/config/abi_prefix.hpp> // must be the last #include
# if defined(_MSC_VER)
# pragma warning(push) // Save warning settings
# pragma warning(disable : 4251) // disable warning: class 'std::basic_string<_Elem,_Traits,_Ax>'
# endif // needs to have dll-interface...
//--------------------------------------------------------------------------------------//
namespace boost
{
namespace timer
{
class cpu_timer;
class auto_cpu_timer;
typedef boost::int_least64_t nanosecond_type;
struct cpu_times
{
nanosecond_type wall;
nanosecond_type user;
nanosecond_type system;
void clear() { wall = user = system = 0; }
};
const short default_places = 6;
BOOST_TIMER_DECL
std::string format(const cpu_times& times, short places, const std::string& format);
BOOST_TIMER_DECL
std::string format(const cpu_times& times, short places = default_places);
// cpu_timer -------------------------------------------------------------------------//
class BOOST_TIMER_DECL cpu_timer
{
public:
// constructor
cpu_timer() BOOST_NOEXCEPT { start(); }
// observers
bool is_stopped() const BOOST_NOEXCEPT { return m_is_stopped; }
cpu_times elapsed() const BOOST_NOEXCEPT; // does not stop()
std::string format(short places, const std::string& format) const
{ return ::boost::timer::format(elapsed(), places, format); }
std::string format(short places = default_places) const
{ return ::boost::timer::format(elapsed(), places); }
// actions
void start() BOOST_NOEXCEPT;
void stop() BOOST_NOEXCEPT;
void resume() BOOST_NOEXCEPT;
private:
cpu_times m_times;
bool m_is_stopped;
};
// auto_cpu_timer --------------------------------------------------------------------//
class BOOST_TIMER_DECL auto_cpu_timer : public cpu_timer
{
public:
// Explicit defaults for os are not provided to avoid including <iostream>, which has
// high costs even when the standard streams are not actually used. Explicit defaults
// for format are not provided to avoid order-of-dynamic-initialization issues with a
// std::string.
explicit auto_cpu_timer(short places = default_places); // #1
auto_cpu_timer(short places, const std::string& format); // #2
explicit auto_cpu_timer(const std::string& format); // #3
auto_cpu_timer(std::ostream& os, short places,
const std::string& format) // #4
: m_places(places), m_os(&os), m_format(format)
{ start(); }
explicit auto_cpu_timer(std::ostream& os, short places = default_places); // #5
auto_cpu_timer(std::ostream& os, const std::string& format) // #6
: m_places(default_places), m_os(&os), m_format(format)
{ start(); }
~auto_cpu_timer();
// observers
// not particularly useful to users, but allow testing of constructor
// postconditions and ease specification of other functionality without resorting
// to "for exposition only" private members.
std::ostream& ostream() const { return *m_os; }
short places() const { return m_places; }
const std::string& format_string() const { return m_format; }
// actions
void report();
private:
short m_places;
std::ostream* m_os; // stored as ptr so compiler can generate operator=
std::string m_format;
};
} // namespace timer
} // namespace boost
# if defined(_MSC_VER)
# pragma warning(pop) // restore warning settings.
# endif
#include <boost/config/abi_suffix.hpp> // pops abi_prefix.hpp pragmas
#endif // BOOST_TIMER_TIMER_HPP
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