| // Copyright (C) 2009-2021 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING3. If not see |
| // <http://www.gnu.org/licenses/>. |
| |
| |
| #include <atomic> |
| #include <testsuite_performance.h> |
| |
| volatile std::atomic_flag af; |
| volatile std::atomic_uchar ac; |
| volatile std::atomic_int ai; |
| |
| int main() |
| { |
| using namespace __gnu_test; |
| time_counter time; |
| resource_counter resource; |
| |
| const int n = 100000000; |
| |
| start_counters(time, resource); |
| for (int i = 0; i < n; ++i) |
| af.test_and_set(); |
| stop_counters(time, resource); |
| report_performance(__FILE__, "atomic_flag::test_and_set()", time, resource); |
| |
| start_counters(time, resource); |
| for (int i = 0; i < n; ++i) |
| af.clear(); |
| stop_counters(time, resource); |
| report_performance(__FILE__, "atomic_flag::clear()", time, resource); |
| |
| start_counters(time, resource); |
| for (int i = 0; i < n; ++i) |
| ac |= 1; |
| stop_counters(time, resource); |
| report_performance(__FILE__, "atomic_uchar::operator|=(1)", time, resource); |
| |
| start_counters(time, resource); |
| for (int i = 0; i < n; ++i) |
| ac = 0; |
| stop_counters(time, resource); |
| report_performance(__FILE__, "atomic_flag::operator=(0)", time, resource); |
| |
| start_counters(time, resource); |
| for (int i = 0; i < n; ++i) |
| ai |= 1; |
| stop_counters(time, resource); |
| report_performance(__FILE__, "atomic_int::operator|=(1)", time, resource); |
| |
| start_counters(time, resource); |
| for (int i = 0; i < n; ++i) |
| ai = 0; |
| stop_counters(time, resource); |
| report_performance(__FILE__, "atomic_int::operator=(0)", time, resource); |
| |
| return 0; |
| } |