1 /* User/system CPU time clocks that follow the std::chrono interface. 2 Copyright (C) 2016-2023 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 "common-defs.h" 20 #include "run-time-clock.h" 21 #if defined HAVE_SYS_RESOURCE_H 22 #include <sys/resource.h> 23 #endif 24 25 using namespace std::chrono; 26 27 run_time_clock::time_point 28 run_time_clock::now () noexcept 29 { 30 return time_point (microseconds (get_run_time ())); 31 } 32 33 #ifdef HAVE_GETRUSAGE 34 static std::chrono::microseconds 35 timeval_to_microseconds (struct timeval *tv) 36 { 37 return (seconds (tv->tv_sec) + microseconds (tv->tv_usec)); 38 } 39 #endif 40 41 void 42 run_time_clock::now (user_cpu_time_clock::time_point &user, 43 system_cpu_time_clock::time_point &system) noexcept 44 { 45 #ifdef HAVE_GETRUSAGE 46 struct rusage rusage; 47 48 getrusage (RUSAGE_SELF, &rusage); 49 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); 54 #else 55 user = user_cpu_time_clock::time_point (microseconds (get_run_time ())); 56 system = system_cpu_time_clock::time_point (microseconds::zero ()); 57 #endif 58 } 59