]>
Commit | Line | Data |
---|---|---|
f1717362 | 1 | // Copyright (C) 2009-2016 Free Software Foundation, Inc. |
a0dadc4a | 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 <future> | |
20 | #include <thread> | |
21 | #include <testsuite_performance.h> | |
22 | ||
b9cbb3c9 | 23 | inline bool is_ready(std::shared_future<void>& f) |
24 | { | |
ca0fdaa4 | 25 | return f.wait_for(std::chrono::microseconds(1)) == std::future_status::ready; |
b9cbb3c9 | 26 | } |
27 | ||
a0dadc4a | 28 | void poll(std::shared_future<void> f) |
29 | { | |
b9cbb3c9 | 30 | while (!is_ready(f)) |
a0dadc4a | 31 | { } |
32 | } | |
33 | ||
34 | int main() | |
35 | { | |
7e1cd1c8 | 36 | #ifdef TEST_T1 |
37 | #define thread_type true | |
38 | #endif | |
39 | ||
a0dadc4a | 40 | using namespace __gnu_test; |
41 | time_counter time; | |
42 | resource_counter resource; | |
43 | ||
44 | const int n = 20; | |
45 | std::promise<void> p; | |
46 | std::shared_future<void> f = p.get_future(); | |
47 | std::thread pollers[n]; | |
48 | for (int i=0; i < n; ++i) | |
49 | pollers[i] = std::thread(poll, f); | |
50 | ||
51 | start_counters(time, resource); | |
52 | ||
53 | for (int i = 0; i < 1000000; ++i) | |
b9cbb3c9 | 54 | (void)is_ready(f); |
a0dadc4a | 55 | p.set_value(); |
56 | ||
57 | for (int i=0; i < n; ++i) | |
58 | pollers[i].join(); | |
59 | ||
60 | stop_counters(time, resource); | |
61 | report_performance(__FILE__, "", time, resource); | |
62 | ||
63 | return 0; | |
64 | } |