]>
Commit | Line | Data |
---|---|---|
92f5a8d4 TL |
1 | // (C) Copyright Raffi Enficiaud 2019. |
2 | // Distributed under the Boost Software License, Version 1.0. | |
3 | // (See accompanying file LICENSE_1_0.txt or copy at | |
4 | // http://www.boost.org/LICENSE_1_0.txt) | |
5 | ||
6 | // See http://www.boost.org/libs/test for the library home page. | |
7 | // | |
8 | // Description : timer and elapsed types | |
9 | // *************************************************************************** | |
10 | ||
11 | #ifndef BOOST_TEST_UTILS_TIMER_HPP | |
12 | #define BOOST_TEST_UTILS_TIMER_HPP | |
13 | ||
14 | #include <boost/config.hpp> | |
15 | #include <boost/cstdint.hpp> | |
16 | #include <utility> | |
17 | #include <ctime> | |
18 | ||
19 | # if defined(_WIN32) || defined(__CYGWIN__) | |
20 | # define BOOST_TEST_TIMER_WINDOWS_API | |
21 | # elif defined(__MACH__)// && !defined(CLOCK_MONOTONIC) | |
22 | # // we compile for all macs the same, CLOCK_MONOTONIC introduced in 10.12 | |
23 | # define BOOST_TEST_TIMER_MACH_API | |
24 | # else | |
25 | # define BOOST_TEST_TIMER_POSIX_API | |
26 | # if !defined(CLOCK_MONOTONIC) | |
27 | # error "CLOCK_MONOTONIC not defined" | |
28 | # endif | |
29 | # endif | |
30 | ||
31 | # if defined(BOOST_TEST_TIMER_WINDOWS_API) | |
32 | # include <windows.h> | |
33 | # elif defined(BOOST_TEST_TIMER_MACH_API) | |
34 | # include <mach/mach_time.h> | |
35 | //# include <mach/mach.h> /* host_get_clock_service, mach_... */ | |
36 | # else | |
37 | # include <sys/time.h> | |
38 | # endif | |
39 | ||
40 | # ifdef BOOST_NO_STDC_NAMESPACE | |
41 | namespace std { using ::clock_t; using ::clock; } | |
42 | # endif | |
43 | ||
44 | namespace boost { | |
45 | namespace unit_test { | |
46 | namespace timer { | |
47 | ||
48 | struct elapsed_time | |
49 | { | |
50 | typedef boost::int_least64_t nanosecond_type; | |
51 | ||
52 | nanosecond_type wall; | |
53 | nanosecond_type system; | |
54 | void clear() { | |
55 | wall = 0; | |
56 | system = 0; | |
57 | } | |
58 | }; | |
59 | ||
60 | inline double | |
61 | microsecond_wall_time( elapsed_time const& elapsed ) | |
62 | { | |
63 | return elapsed.wall / 1E3; | |
64 | } | |
65 | ||
66 | inline double | |
67 | second_wall_time( elapsed_time const& elapsed ) | |
68 | { | |
69 | return elapsed.wall / 1E9; | |
70 | } | |
71 | ||
72 | namespace details { | |
73 | #if defined(BOOST_TEST_TIMER_WINDOWS_API) | |
74 | elapsed_time::nanosecond_type get_tick_freq() { | |
75 | LARGE_INTEGER freq; | |
76 | ::QueryPerformanceFrequency( &freq ); | |
77 | return static_cast<elapsed_time::nanosecond_type>(freq.QuadPart); | |
78 | } | |
79 | #elif defined(BOOST_TEST_TIMER_MACH_API) | |
80 | std::pair<elapsed_time::nanosecond_type, elapsed_time::nanosecond_type> get_time_base() { | |
81 | mach_timebase_info_data_t timebase; | |
82 | if(mach_timebase_info(&timebase) == 0) | |
83 | return std::pair<elapsed_time::nanosecond_type, elapsed_time::nanosecond_type>(timebase.numer, timebase.denom); | |
84 | return std::pair<elapsed_time::nanosecond_type, elapsed_time::nanosecond_type>(0, 1); | |
85 | } | |
86 | #endif | |
87 | } | |
88 | ||
89 | //! Simple timing class | |
90 | //! | |
91 | //! This class measures the wall clock time. | |
92 | class timer | |
93 | { | |
94 | public: | |
95 | timer() | |
96 | { | |
97 | restart(); | |
98 | } | |
99 | void restart() | |
100 | { | |
101 | _start_time_clock = std::clock(); | |
102 | #if defined(BOOST_TEST_TIMER_WINDOWS_API) | |
103 | ::QueryPerformanceCounter(&_start_time_wall); | |
104 | #elif defined(BOOST_TEST_TIMER_MACH_API) | |
105 | _start_time_wall = mach_absolute_time(); | |
106 | #else | |
107 | if( ::clock_gettime( CLOCK_MONOTONIC, &_start_time_wall ) != 0 ) | |
108 | { | |
109 | _start_time_wall.tv_nsec = -1; | |
110 | _start_time_wall.tv_sec = -1; | |
111 | } | |
112 | #endif | |
113 | } | |
114 | ||
115 | // return elapsed time in seconds | |
116 | elapsed_time elapsed() const | |
117 | { | |
118 | typedef elapsed_time::nanosecond_type nanosecond_type; | |
119 | static const double clock_to_nano_seconds = 1E9 / CLOCKS_PER_SEC; | |
120 | elapsed_time return_value; | |
121 | ||
122 | // processor / system time | |
123 | return_value.system = static_cast<nanosecond_type>(double(std::clock() - _start_time_clock) * clock_to_nano_seconds); | |
124 | ||
125 | #if defined(BOOST_TEST_TIMER_WINDOWS_API) | |
126 | static const nanosecond_type tick_per_sec = details::get_tick_freq(); | |
127 | LARGE_INTEGER end_time; | |
128 | ::QueryPerformanceCounter(&end_time); | |
129 | return_value.wall = static_cast<nanosecond_type>(((end_time.QuadPart - _start_time_wall.QuadPart) * 1E9) / tick_per_sec); | |
130 | #elif defined(BOOST_TEST_TIMER_MACH_API) | |
131 | static std::pair<nanosecond_type, nanosecond_type> timebase = details::get_time_base(); | |
132 | nanosecond_type clock = mach_absolute_time() - _start_time_wall; | |
133 | return_value.wall = static_cast<nanosecond_type>((clock * timebase.first) / timebase.second); | |
134 | #else | |
135 | struct timespec end_time; | |
136 | if( ::clock_gettime( CLOCK_MONOTONIC, &end_time ) == 0 ) | |
137 | { | |
138 | return_value.wall = static_cast<nanosecond_type>((end_time.tv_sec - _start_time_wall.tv_sec) * 1E9 + (end_time.tv_nsec - _start_time_wall.tv_nsec)); | |
139 | } | |
140 | #endif | |
141 | ||
142 | return return_value; | |
143 | } | |
144 | ||
145 | private: | |
146 | std::clock_t _start_time_clock; | |
147 | #if defined(BOOST_TEST_TIMER_WINDOWS_API) | |
148 | LARGE_INTEGER _start_time_wall; | |
149 | #elif defined(BOOST_TEST_TIMER_MACH_API) | |
150 | elapsed_time::nanosecond_type _start_time_wall; | |
151 | #else | |
152 | struct timespec _start_time_wall; | |
153 | #endif | |
154 | }; | |
155 | ||
156 | ||
157 | //____________________________________________________________________________// | |
158 | ||
159 | } // namespace timer | |
160 | } // namespace unit_test | |
161 | } // namespace boost | |
162 | ||
163 | #endif // BOOST_TEST_UTILS_TIMER_HPP | |
164 |