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dcb07cfa | 1 | /* User/system CPU time clocks that follow the std::chrono interface. |
42a4f53d | 2 | Copyright (C) 2016-2019 Free Software Foundation, Inc. |
dcb07cfa PA |
3 | |
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
18 | ||
1a5c2598 TT |
19 | #ifndef COMMON_RUN_TIME_CLOCK_H |
20 | #define COMMON_RUN_TIME_CLOCK_H | |
dcb07cfa PA |
21 | |
22 | #include <chrono> | |
23 | ||
24 | /* Count the total amount of time spent executing in user mode. */ | |
25 | ||
26 | struct user_cpu_time_clock | |
27 | { | |
28 | using duration = std::chrono::microseconds; | |
29 | using rep = duration::rep; | |
30 | using period = duration::period; | |
31 | using time_point = std::chrono::time_point<user_cpu_time_clock>; | |
32 | ||
33 | static constexpr bool is_steady = true; | |
34 | ||
35 | /* Use run_time_clock::now instead. */ | |
36 | static time_point now () noexcept = delete; | |
37 | }; | |
38 | ||
39 | /* Count the total amount of time spent executing in kernel mode. */ | |
40 | ||
41 | struct system_cpu_time_clock | |
42 | { | |
43 | using duration = std::chrono::microseconds; | |
44 | using rep = duration::rep; | |
45 | using period = duration::period; | |
46 | using time_point = std::chrono::time_point<system_cpu_time_clock>; | |
47 | ||
48 | static constexpr bool is_steady = true; | |
49 | ||
50 | /* Use run_time_clock::now instead. */ | |
51 | static time_point now () noexcept = delete; | |
52 | }; | |
53 | ||
54 | /* Count the total amount of time spent executing in userspace+kernel | |
55 | mode. */ | |
56 | ||
57 | struct run_time_clock | |
58 | { | |
59 | using duration = std::chrono::microseconds; | |
60 | using rep = duration::rep; | |
61 | using period = duration::period; | |
62 | using time_point = std::chrono::time_point<run_time_clock>; | |
63 | ||
64 | static constexpr bool is_steady = true; | |
65 | ||
66 | static time_point now () noexcept; | |
67 | ||
68 | /* Return the user/system time as separate time points, if | |
69 | supported. If not supported, then the combined user+kernel time | |
70 | is returned in USER and SYSTEM is set to zero. */ | |
71 | static void now (user_cpu_time_clock::time_point &user, | |
72 | system_cpu_time_clock::time_point &system) noexcept; | |
73 | }; | |
74 | ||
1a5c2598 | 75 | #endif /* COMMON_RUN_TIME_CLOCK_H */ |