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76 lines
2.3 KiB
C++
76 lines
2.3 KiB
C++
/* User/system CPU time clocks that follow the std::chrono interface.
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Copyright (C) 2016-2018 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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#ifndef RUN_TIME_CLOCK_H
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#define RUN_TIME_CLOCK_H
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#include <chrono>
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/* Count the total amount of time spent executing in user mode. */
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struct user_cpu_time_clock
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{
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using duration = std::chrono::microseconds;
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using rep = duration::rep;
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using period = duration::period;
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using time_point = std::chrono::time_point<user_cpu_time_clock>;
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static constexpr bool is_steady = true;
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/* Use run_time_clock::now instead. */
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static time_point now () noexcept = delete;
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};
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/* Count the total amount of time spent executing in kernel mode. */
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struct system_cpu_time_clock
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{
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using duration = std::chrono::microseconds;
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using rep = duration::rep;
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using period = duration::period;
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using time_point = std::chrono::time_point<system_cpu_time_clock>;
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static constexpr bool is_steady = true;
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/* Use run_time_clock::now instead. */
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static time_point now () noexcept = delete;
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};
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/* Count the total amount of time spent executing in userspace+kernel
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mode. */
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struct run_time_clock
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{
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using duration = std::chrono::microseconds;
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using rep = duration::rep;
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using period = duration::period;
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using time_point = std::chrono::time_point<run_time_clock>;
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static constexpr bool is_steady = true;
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static time_point now () noexcept;
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/* Return the user/system time as separate time points, if
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supported. If not supported, then the combined user+kernel time
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is returned in USER and SYSTEM is set to zero. */
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static void 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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#endif
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