1 // { dg-do run } 2 // { dg-additional-options "-pthread" { target pthread } } 3 // { dg-require-effective-target c++11 } 4 // { dg-require-gthreads "" } 5 6 // Copyright (C) 2014-2021 Free Software Foundation, Inc. 7 // 8 // This file is part of the GNU ISO C++ Library. This library is free 9 // software; you can redistribute it and/or modify it under the 10 // terms of the GNU General Public License as published by the 11 // Free Software Foundation; either version 3, or (at your option) 12 // any later version. 13 14 // This library is distributed in the hope that it will be useful, 15 // but WITHOUT ANY WARRANTY; without even the implied warranty of 16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 // GNU General Public License for more details. 18 19 // You should have received a copy of the GNU General Public License along 20 // with this library; see the file COPYING3. If not see 21 // <http://www.gnu.org/licenses/>. 22 23 #include <condition_variable> 24 #include <thread> 25 #include <mutex> 26 #include <testsuite_hooks.h> 27 28 std::mutex mx; 29 std::condition_variable cv; 30 int counter = 0; 31 32 struct Inc 33 { IncInc34 Inc() { ++counter; } ~IncInc35 ~Inc() { ++counter; } 36 }; 37 38 func()39void func() 40 { 41 std::unique_lock<std::mutex> lock{mx}; 42 std::notify_all_at_thread_exit(cv, std::move(lock)); 43 #if CORRECT_THREAD_LOCAL_DTORS 44 // Correct order of thread_local destruction needs __cxa_thread_atexit_impl 45 // or similar support from libc. 46 static thread_local 47 #endif 48 Inc inc; 49 } 50 main()51int main() 52 { 53 std::unique_lock<std::mutex> lock{mx}; 54 std::thread t{func}; 55 cv.wait(lock, [&]{ return counter == 2; }); 56 t.join(); 57 } 58