libstdc++-v3/testsuite/30_threads/barrier/arrive_and_wait.cc

   1 // { dg-options "-std=gnu++2a" }
   2 // { dg-do run { target c++2a } }
   3 // { dg-require-gthreads "" }
   4 // { dg-additional-options "-pthread" { target pthread } }
   5 // { dg-add-options libatomic }
   6
   7 // Copyright (C) 2020-2022 Free Software Foundation, Inc.
   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 // This test is based on libcxx/test/std/thread/thread.barrier/arrive_and_wait.pass.cpp
  25 //===----------------------------------------------------------------------===//
  26 //
  27 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  28 // See https://llvm.org/LICENSE.txt for license information.
  29 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  30 //
  31 //===----------------------------------------------------------------------===//
  32
  33 #include <barrier>
  34 #include <thread>
  35
  36 int main(int, char**)
  37 {
  38   std::barrier<> b(2);
  39
  40   std::thread t([&](){
  41     for(int i = 0; i < 10; ++i)
  42       b.arrive_and_wait();
  43   });
  44   for(int i = 0; i < 10; ++i)
  45     b.arrive_and_wait();
  46   t.join();
  47 }