1 /* User/system CPU time clocks that follow the std::chrono interface. 2 Copyright (C) 2016-2024 Free Software Foundation, Inc. 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 19 #include "run-time-clock.h" 20 #if defined HAVE_SYS_RESOURCE_H 21 #include <sys/resource.h> 22 #endif 23 24 using namespace std::chrono; 25 26 run_time_clock::time_point 27 run_time_clock::now () noexcept 28 { 29 return time_point (microseconds (get_run_time ())); 30 } 31 32 #ifdef HAVE_GETRUSAGE 33 static std::chrono::microseconds 34 timeval_to_microseconds (struct timeval *tv) 35 { 36 return (seconds (tv->tv_sec) + microseconds (tv->tv_usec)); 37 } 38 #endif 39 40 void 41 run_time_clock::now (user_cpu_time_clock::time_point &user, 42 system_cpu_time_clock::time_point &system) noexcept 43 { 44 #ifdef HAVE_GETRUSAGE 45 struct rusage rusage; 46 47 getrusage (RUSAGE_SELF, &rusage); 48 49 microseconds utime = timeval_to_microseconds (&rusage.ru_utime); 50 microseconds stime = timeval_to_microseconds (&rusage.ru_stime); 51 user = user_cpu_time_clock::time_point (utime); 52 system = system_cpu_time_clock::time_point (stime); 53 #else 54 user = user_cpu_time_clock::time_point (microseconds (get_run_time ())); 55 system = system_cpu_time_clock::time_point (microseconds::zero ()); 56 #endif 57 } 58