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d1236680 RO |
1 | // { dg-do run } |
2 | // { dg-options "-pthread" } | |
71c54f8e | 3 | // { dg-require-effective-target c++11 } |
d1236680 | 4 | // { dg-require-effective-target pthread } |
a0eaa08c | 5 | // { dg-require-gthreads "" } |
a0eaa08c | 6 | |
8d9254fc | 7 | // Copyright (C) 2014-2020 Free Software Foundation, Inc. |
a0eaa08c JW |
8 | // |
9 | // This file is part of the GNU ISO C++ Library. This library is free | |
10 | // software; you can redistribute it and/or modify it under the | |
11 | // terms of the GNU General Public License as published by the | |
12 | // Free Software Foundation; either version 3, or (at your option) | |
13 | // any later version. | |
14 | ||
15 | // This library is distributed in the hope that it will be useful, | |
16 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | // GNU General Public License for more details. | |
19 | ||
20 | // You should have received a copy of the GNU General Public License along | |
21 | // with this library; see the file COPYING3. If not see | |
22 | // <http://www.gnu.org/licenses/>. | |
23 | ||
24 | // libstdc++/60966 | |
25 | // This test hangs if std::promise::~promise() destroys the | |
26 | // shared state before std::promise::set_value() finishes using it. | |
27 | ||
28 | #include <future> | |
29 | #include <thread> | |
30 | #include <vector> | |
31 | ||
32 | const int THREADS = 10; | |
33 | ||
34 | void run_task(std::promise<void>* pr) | |
35 | { | |
36 | std::this_thread::sleep_for(std::chrono::milliseconds(100)); | |
37 | pr->set_value(); | |
38 | } | |
39 | ||
40 | int main() | |
41 | { | |
42 | std::vector<std::promise<void>*> tasks(THREADS); | |
43 | std::vector<std::thread> threads(THREADS); | |
44 | std::vector<std::future<void>> futures(THREADS); | |
45 | ||
46 | for (int i = 0; i < THREADS; ++i) | |
47 | { | |
48 | std::promise<void>* task = new std::promise<void>; | |
49 | tasks[i] = task; | |
50 | futures[i] = task->get_future(); | |
51 | threads[i] = std::thread(run_task, task); | |
52 | } | |
53 | ||
54 | for (int i = 0; i < THREADS; ++i) | |
55 | { | |
56 | // the temporary future releases the state as soon as wait() returns | |
57 | std::future<void>(std::move(futures[i])).wait(); | |
58 | // state is ready, should now be safe to delete promise, so it | |
59 | // releases the shared state too | |
60 | delete tasks[i]; | |
61 | } | |
62 | ||
63 | for (auto& t : threads) | |
64 | t.join(); | |
65 | } |