ceph/src/boost/libs/chrono/example/io_ex1.cpp

   1 //  io_ex1.cpp  ----------------------------------------------------------//
   2
   3 //  Copyright 2010 Howard Hinnant
   4 //  Copyright 2010 Vicente J. Botet Escriba
   5 //  Copyright (c) Microsoft Corporation 2014
   6
   7 //  Distributed under the Boost Software License, Version 1.0.
   8 //  See http://www.boost.org/LICENSE_1_0.txt
   9
  10 /*
  11 This code was adapted by Vicente J. Botet Escriba from Hinnant's html documentation.
  12 Many thanks to Howard for making his code available under the Boost license.
  13
  14 */
  15
  16 #include <iostream>
  17 #include <boost/chrono/config.hpp>
  18 #include <boost/chrono/chrono_io.hpp>
  19 #include <boost/chrono/system_clocks.hpp>
  20 #include <boost/chrono/thread_clock.hpp>
  21 #include <boost/chrono/process_cpu_clocks.hpp>
  22
  23 int main()
  24 {
  25     using std::cout;
  26     using namespace boost;
  27     using namespace boost::chrono;
  28
  29     cout << "milliseconds(1)  = "
  30          <<  milliseconds(1)  << '\n';
  31     cout << "milliseconds(3) + microseconds(10) = "
  32          <<  milliseconds(3) + microseconds(10) << '\n';
  33
  34     cout << "hours(3) + minutes(10) = "
  35          <<  hours(3) + minutes(10) << '\n';
  36
  37     typedef duration<long long, ratio<1, 2500000000ULL> > ClockTick;
  38     cout << "ClockTick(3) + nanoseconds(10) = "
  39          <<  ClockTick(3) + nanoseconds(10) << '\n';
  40
  41     cout << "\nSet cout to use short names:\n";
  42 #if BOOST_CHRONO_VERSION==2
  43     cout << duration_fmt(duration_style::symbol);
  44 #else
  45     cout << duration_short;
  46 #endif
  47     cout << "milliseconds(3) + microseconds(10) = "
  48          <<  milliseconds(3) + microseconds(10) << '\n';
  49
  50     cout << "hours(3) + minutes(10) = "
  51          <<  hours(3) + minutes(10) << '\n';
  52
  53     cout << "ClockTick(3) + nanoseconds(10) = "
  54          <<  ClockTick(3) + nanoseconds(10) << '\n';
  55
  56     cout << "\nsystem_clock::now() = " << system_clock::now() << '\n';
  57 #if defined _MSC_VER && _MSC_VER == 1700
  58 #else
  59 #if BOOST_CHRONO_VERSION==2
  60     cout << "\nsystem_clock::now() = " << time_fmt(chrono::timezone::local) << system_clock::now() << '\n';
  61     cout << "\nsystem_clock::now() = " << time_fmt(chrono::timezone::local,"%Y/%m/%d") << system_clock::now() << '\n';
  62 #endif
  63 #endif
  64
  65 #ifdef BOOST_CHRONO_HAS_CLOCK_STEADY
  66     cout << "steady_clock::now() = " << steady_clock::now() << '\n';
  67 #endif
  68 #if BOOST_CHRONO_VERSION==2
  69     cout << "\nSet cout to use long names:\n" << duration_fmt(duration_style::prefix)
  70          << "high_resolution_clock::now() = " << high_resolution_clock::now() << '\n';
  71 #else
  72     cout << "\nSet cout to use long names:\n" <<  duration_long
  73          << "high_resolution_clock::now() = " << high_resolution_clock::now() << '\n';
  74 #endif
  75 #if defined(BOOST_CHRONO_HAS_THREAD_CLOCK)
  76     cout << "\nthread_clock::now() = " << thread_clock::now() << '\n';
  77 #endif
  78 #if defined(BOOST_CHRONO_HAS_PROCESS_CLOCKS)
  79     cout << "\nprocess_real_cpu_clock::now() = " << process_real_cpu_clock::now() << '\n';
  80 #if BOOST_PLAT_WINDOWS_DESKTOP
  81     cout << "\nprocess_user_cpu_clock::now() = " << process_user_cpu_clock::now() << '\n';
  82     cout << "\nprocess_system_cpu_clock::now() = " << process_system_cpu_clock::now() << '\n';
  83     cout << "\nprocess_cpu_clock::now() = " << process_cpu_clock::now() << '\n';
  84 #endif
  85 #endif
  86     return 0;
  87 }