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1 // { dg-do run }
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2 // { dg-options "-pthread" }
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3 // { dg-require-effective-target c++11 }
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4 // { dg-require-effective-target pthread }
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5 // { dg-require-cstdint "" }
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6 // { dg-require-gthreads "" }
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7
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8 // Copyright (C) 2009-2017 Free Software Foundation, Inc.
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9 //
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10 // This file is part of the GNU ISO C++ Library. This library is free
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11 // software; you can redistribute it and/or modify it under the
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12 // terms of the GNU General Public License as published by the
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13 // Free Software Foundation; either version 3, or (at your option)
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14 // any later version.
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15
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16 // This library is distributed in the hope that it will be useful,
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17 // but WITHOUT ANY WARRANTY; without even the implied warranty of
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18 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 // GNU General Public License for more details.
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20
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21 // You should have received a copy of the GNU General Public License along
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22 // with this library; see the file COPYING3. If not see
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23 // <http://www.gnu.org/licenses/>.
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24
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25 #include <future>
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26 #include <testsuite_hooks.h>
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27
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28
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29 // Test promise::set_value() for deadlock by checking if the state is ready
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30 // during construction and destruction of the associated state.
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31
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32 struct tester
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33 {
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34 tester(int);
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35 tester(const tester&);
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36 tester() = delete;
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37 tester& operator=(const tester&);
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38 };
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39
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40 std::promise<tester> pglobal;
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41 std::future<tester> fglobal = pglobal.get_future();
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42
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43 auto delay = std::chrono::milliseconds(1);
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44
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45 tester::tester(int)
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46 {
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47 VERIFY (fglobal.wait_for(delay) == std::future_status::timeout);
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48 }
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49
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50 tester::tester(const tester&)
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51 {
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52 // if this copy happens while a mutex is locked next line could deadlock:
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53 VERIFY (fglobal.wait_for(delay) == std::future_status::timeout);
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54 }
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55
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56 tester& tester::operator=(const tester&)
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57 {
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58 // if this copy happens while a mutex is locked next line could deadlock:
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59 VERIFY (fglobal.wait_for(delay) == std::future_status::timeout);
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60 return *this;
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61 }
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62
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63 void test01()
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64 {
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65 pglobal.set_value( tester(1) );
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66
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67 VERIFY (fglobal.wait_for(delay) == std::future_status::ready);
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68 }
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69
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70 int main()
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71 {
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72 test01();
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73 return 0;
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74 }
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