QueuedThreadPool/chrono_io_ex1.cpp at master · ClausKlein/QueuedThreadPool · GitHub

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//  io_ex1.cpp  ----------------------------------------------------------//

//  Copyright 2010 Howard Hinnant
//  Copyright 2010 Vicente J. Botet Escriba
//  Copyright (c) Microsoft Corporation 2014

//  Distributed under the Boost Software License, Version 1.0.
//  See http://www.boost.org/LICENSE_1_0.txt

/*
This code was adapted by Vicente J. Botet Escriba from Hinnant's html
documentation. Many thanks to Howard for making his code available under the
Boost license.
*/

#define BOOST_CHRONO_VERSION 2

#include <boost/chrono/chrono_io.hpp>
#include <boost/chrono/config.hpp>
#include <boost/chrono/process_cpu_clocks.hpp>
#include <boost/chrono/system_clocks.hpp>
#include <boost/chrono/thread_clock.hpp>

#include <iostream>

int main()
{
    using std::cout;
    using namespace boost;
    using namespace boost::chrono;

    cout << "milliseconds(1)  = " << milliseconds(1) << '\n';
    cout << "milliseconds(3) + microseconds(10) = "
         << milliseconds(3) + microseconds(10) << '\n';

    cout << "hours(3) + minutes(10) = " << hours(3) + minutes(10) << '\n';

    typedef duration<long long, ratio<1, 2500000000ULL> > ClockTick;
    cout << "ClockTick(3) + nanoseconds(10) = "
         << ClockTick(3) + nanoseconds(10) << '\n';

    //========================================
    cout << "\nSet cout to use short names:\n";

#if BOOST_CHRONO_VERSION == 2
    cout << duration_fmt(duration_style::symbol);
#else
    cout << duration_short;
#endif

    cout << "milliseconds(3) + microseconds(10) = "
         << milliseconds(3) + microseconds(10) << '\n';

    cout << "hours(3) + minutes(10) = " << hours(3) + minutes(10) << '\n';

    cout << "ClockTick(3) + nanoseconds(10) = "
         << ClockTick(3) + nanoseconds(10) << '\n';

    cout << "\nsystem_clock::now() = " << system_clock::now() << '\n';
    //>>>>>>>> system_clock::now() = 2018-11-01 20:40:04.126208000 +0100

#if BOOST_CHRONO_VERSION == 2
    cout << "\nsystem_clock::now() = " << time_fmt(chrono::timezone::local)
         << system_clock::now() << '\n';
    //>>>>> steady_clock::now() = 3622313527196 ns since boot
    cout << "\nsystem_clock::now() = "
         << time_fmt(chrono::timezone::local, "%Y/%m/%d")
         << system_clock::now() << '\n';
    //>>>>> system_clock::now() = 2018/11/01
#endif

#ifdef BOOST_CHRONO_HAS_CLOCK_STEADY
    cout << "steady_clock::now() = " << steady_clock::now() << '\n';
    //>>>>>> steady_clock::now() = 3622313527196 ns since boot
#endif

#if BOOST_CHRONO_VERSION == 2
    //========================================
    cout << "\nSet cout to use long names:\n"
         << duration_fmt(duration_style::prefix)
         << "high_resolution_clock::now() = " << high_resolution_clock::now()
         << '\n';
    //>>>>>> high_resolution_clock::now() = 3622313562363 nanoseconds since
    // boot
#else
    cout << "\nSet cout to use long names:\n"
         << duration_long
         << "high_resolution_clock::now() = " << high_resolution_clock::now()
         << '\n';
#endif

#if defined(BOOST_CHRONO_HAS_THREAD_CLOCK)
    cout << "\nthread_clock::now() = " << thread_clock::now() << '\n';
    //>>>>>> thread_clock::now() = 5556000 nanoseconds since thread start-up
#endif

#if defined(BOOST_CHRONO_HAS_PROCESS_CLOCKS)
    cout << "\nprocess_real_cpu_clock::now() = "
         << process_real_cpu_clock::now() << '\n';
    //>>>>> process_real_cpu_clock::now() = 1541101204120000000 nanoseconds
    // since process start-up

#    if BOOST_PLAT_WINDOWS_DESKTOP
    cout << "\nprocess_user_cpu_clock::now() = "
         << process_user_cpu_clock::now() << '\n';
    cout << "\nprocess_system_cpu_clock::now() = "
         << process_system_cpu_clock::now() << '\n';
    cout << "\nprocess_cpu_clock::now() = " << process_cpu_clock::now()
         << '\n';
#    endif

#endif

    return 0;
}