1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // UNSUPPORTED: libcpp-has-no-threads
10 // UNSUPPORTED: c++98, c++03, c++11
11 
12 // <barrier>
13 
14 #include <barrier>
15 #include <thread>
16 #include <cassert>
17 
18 #include "test_macros.h"
19 
20 int main(int, char**)
21 {
22   int x = 0;
23   auto comp = [&]() { x += 1; };
24   std::barrier<decltype(comp)> b(2, comp);
25 
26   std::thread t([&](){
27       for(int i = 0; i < 10; ++i)
28         b.arrive_and_wait();
29   });
30 
31   for(int i = 0; i < 10; ++i)
32     b.arrive_and_wait();
33 
34   assert(x == 10);
35   t.join();
36   return 0;
37 }
38