ceph/src/boost/boost/timer/timer.hpp

   1 //  boost/timer/timer.hpp  -------------------------------------------------------------//
   2
   3 //  Copyright Beman Dawes 1994-2007, 2011
   4
   5 //  Distributed under the Boost Software License, Version 1.0.
   6 //  See http://www.boost.org/LICENSE_1_0.txt
   7
   8 #ifndef BOOST_TIMER_TIMER_HPP
   9 #define BOOST_TIMER_TIMER_HPP
  10
  11 #include <boost/config/warning_disable.hpp>
  12
  13 #include <boost/timer/config.hpp>
  14 //#include <boost/chrono/chrono.hpp>
  15 #include <boost/cstdint.hpp>
  16 #include <string>
  17 #include <cstring>
  18 #include <ostream>
  19
  20 #include <boost/config/abi_prefix.hpp> // must be the last #include
  21
  22 #   if defined(_MSC_VER)
  23 #     pragma warning(push)           // Save warning settings
  24 #     pragma warning(disable : 4251) // disable warning: class 'std::basic_string<_Elem,_Traits,_Ax>'
  25 #   endif                            // needs to have dll-interface...
  26
  27 //--------------------------------------------------------------------------------------//
  28
  29 namespace boost
  30 {
  31 namespace timer
  32 {
  33   class cpu_timer;
  34   class auto_cpu_timer;
  35
  36   typedef boost::int_least64_t nanosecond_type;
  37
  38   struct cpu_times
  39   {
  40     nanosecond_type wall;
  41     nanosecond_type user;
  42     nanosecond_type system;
  43
  44     void clear() { wall = user = system = 0; }
  45   };
  46
  47   const short         default_places = 6;
  48
  49   BOOST_TIMER_DECL
  50   std::string format(const cpu_times& times, short places, const std::string& format);
  51
  52   BOOST_TIMER_DECL
  53   std::string format(const cpu_times& times, short places = default_places);
  54
  55 //  cpu_timer  -------------------------------------------------------------------------//
  56
  57   class BOOST_TIMER_DECL cpu_timer
  58   {
  59   public:
  60
  61     //  constructor
  62     cpu_timer() BOOST_NOEXCEPT                                   { start(); }
  63
  64     //  observers
  65     bool          is_stopped() const BOOST_NOEXCEPT              { return m_is_stopped; }
  66     cpu_times     elapsed() const BOOST_NOEXCEPT;  // does not stop()
  67     std::string   format(short places, const std::string& format) const
  68                         { return ::boost::timer::format(elapsed(), places, format); }
  69     std::string   format(short places = default_places) const
  70                         { return ::boost::timer::format(elapsed(), places); }
  71     //  actions
  72     void          start() BOOST_NOEXCEPT;
  73     void          stop() BOOST_NOEXCEPT;
  74     void          resume() BOOST_NOEXCEPT;
  75
  76   private:
  77     cpu_times     m_times;
  78     bool          m_is_stopped;
  79   };
  80
  81 //  auto_cpu_timer  --------------------------------------------------------------------//
  82
  83   class BOOST_TIMER_DECL auto_cpu_timer : public cpu_timer
  84   {
  85   public:
  86
  87     //  Explicit defaults for os are not provided to avoid including <iostream>, which has
  88     //  high costs even when the standard streams are not actually used. Explicit defaults
  89     //  for format are not provided to avoid order-of-dynamic-initialization issues with a
  90     //  std::string.
  91
  92     explicit auto_cpu_timer(short places = default_places);                          // #1
  93              auto_cpu_timer(short places, const std::string& format);                // #2
  94     explicit auto_cpu_timer(const std::string& format);                              // #3
  95              auto_cpu_timer(std::ostream& os, short places,
  96                             const std::string& format)                               // #4
  97                                    : m_places(places), m_os(&os), m_format(format)
  98                                    { start(); }
  99     explicit auto_cpu_timer(std::ostream& os, short places = default_places);        // #5
 100              auto_cpu_timer(std::ostream& os, const std::string& format)             // #6
 101                                    : m_places(default_places), m_os(&os), m_format(format)
 102                                    { start(); }
 103
 104    ~auto_cpu_timer();
 105
 106    //  observers
 107    //    not particularly useful to users, but allow testing of constructor
 108    //    postconditions and ease specification of other functionality without resorting
 109    //    to "for exposition only" private members.
 110    std::ostream&       ostream() const       { return *m_os; }
 111    short               places() const        { return m_places; }
 112    const std::string&  format_string() const { return m_format; }
 113
 114     //  actions
 115     void   report();
 116
 117   private:
 118     short           m_places;
 119     std::ostream*   m_os;      // stored as ptr so compiler can generate operator=
 120     std::string     m_format;
 121   };
 122
 123 } // namespace timer
 124 } // namespace boost
 125
 126 #   if defined(_MSC_VER)
 127 #     pragma warning(pop) // restore warning settings.
 128 #   endif
 129
 130 #include <boost/config/abi_suffix.hpp> // pops abi_prefix.hpp pragmas
 131
 132 #endif  // BOOST_TIMER_TIMER_HPP