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/*
11This code was adapted by Vicente J. Botet Escriba from Hinnant's html documentation.
12Many 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
23int 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}
88

source code of boost/libs/chrono/example/io_ex1.cpp