1 // Copyright (C) 2009-2021 Free Software Foundation, Inc.
2 //
3 // This file is part of the GNU ISO C++ Library. This library is free
4 // software; you can redistribute it and/or modify it under the
5 // terms of the GNU General Public License as published by the
6 // Free Software Foundation; either version 3, or (at your option)
7 // any later version.
8
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
13
14 // You should have received a copy of the GNU General Public License along
15 // with this library; see the file COPYING3. If not see
16 // <http://www.gnu.org/licenses/>.
17
18
19 #include <atomic>
20 #include <testsuite_performance.h>
21
22 volatile std::atomic_flag af;
23 volatile std::atomic_uchar ac;
24 volatile std::atomic_int ai;
25
main()26 int main()
27 {
28 using namespace __gnu_test;
29 time_counter time;
30 resource_counter resource;
31
32 const int n = 100000000;
33
34 start_counters(time, resource);
35 for (int i = 0; i < n; ++i)
36 af.test_and_set();
37 stop_counters(time, resource);
38 report_performance(__FILE__, "atomic_flag::test_and_set()", time, resource);
39
40 start_counters(time, resource);
41 for (int i = 0; i < n; ++i)
42 af.clear();
43 stop_counters(time, resource);
44 report_performance(__FILE__, "atomic_flag::clear()", time, resource);
45
46 start_counters(time, resource);
47 for (int i = 0; i < n; ++i)
48 ac |= 1;
49 stop_counters(time, resource);
50 report_performance(__FILE__, "atomic_uchar::operator|=(1)", time, resource);
51
52 start_counters(time, resource);
53 for (int i = 0; i < n; ++i)
54 ac = 0;
55 stop_counters(time, resource);
56 report_performance(__FILE__, "atomic_flag::operator=(0)", time, resource);
57
58 start_counters(time, resource);
59 for (int i = 0; i < n; ++i)
60 ai |= 1;
61 stop_counters(time, resource);
62 report_performance(__FILE__, "atomic_int::operator|=(1)", time, resource);
63
64 start_counters(time, resource);
65 for (int i = 0; i < n; ++i)
66 ai = 0;
67 stop_counters(time, resource);
68 report_performance(__FILE__, "atomic_int::operator=(0)", time, resource);
69
70 return 0;
71 }
72