59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
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/* User/system CPU time clocks that follow the std::chrono interface.
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Copyright (C) 2016-2022 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "common-defs.h"
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#include "run-time-clock.h"
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#if defined HAVE_SYS_RESOURCE_H
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#include <sys/resource.h>
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#endif
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using namespace std::chrono;
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run_time_clock::time_point
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run_time_clock::now () noexcept
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{
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return time_point (microseconds (get_run_time ()));
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}
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#ifdef HAVE_GETRUSAGE
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static std::chrono::microseconds
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timeval_to_microseconds (struct timeval *tv)
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{
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return (seconds (tv->tv_sec) + microseconds (tv->tv_usec));
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}
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#endif
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void
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run_time_clock::now (user_cpu_time_clock::time_point &user,
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system_cpu_time_clock::time_point &system) noexcept
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{
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#ifdef HAVE_GETRUSAGE
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struct rusage rusage;
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getrusage (RUSAGE_SELF, &rusage);
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microseconds utime = timeval_to_microseconds (&rusage.ru_utime);
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microseconds stime = timeval_to_microseconds (&rusage.ru_stime);
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user = user_cpu_time_clock::time_point (utime);
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system = system_cpu_time_clock::time_point (stime);
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#else
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user = user_cpu_time_clock::time_point (microseconds (get_run_time ()));
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system = system_cpu_time_clock::time_point (microseconds::zero ());
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#endif
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}
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