1 /* User/system CPU time clocks that follow the std::chrono interface.
2 Copyright (C) 2016-2017 Free Software Foundation, Inc.
4 This file is part of GDB.
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.
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.
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/>. */
19 #include "common-defs.h"
20 #include "run-time-clock.h"
21 #if defined HAVE_SYS_RESOURCE_H
22 #include <sys/resource.h>
25 using namespace std::chrono
;
27 run_time_clock::time_point
28 run_time_clock::now () noexcept
30 return time_point (microseconds (get_run_time ()));
34 static std::chrono::microseconds
35 timeval_to_microseconds (struct timeval
*tv
)
37 return (seconds (tv
->tv_sec
) + microseconds (tv
->tv_usec
));
42 run_time_clock::now (user_cpu_time_clock::time_point
&user
,
43 system_cpu_time_clock::time_point
&system
) noexcept
48 getrusage (RUSAGE_SELF
, &rusage
);
50 microseconds utime
= timeval_to_microseconds (&rusage
.ru_utime
);
51 microseconds stime
= timeval_to_microseconds (&rusage
.ru_stime
);
52 user
= user_cpu_time_clock::time_point (utime
);
53 system
= system_cpu_time_clock::time_point (stime
);
55 user
= user_cpu_time_clock::time_point (microseconds (get_run_time ()));
56 system
= system_cpu_time_clock::time_point (microseconds::zero ());
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