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: no-threads
10 // UNSUPPORTED: c++03, c++11
11 
12 // This test requires the dylib support introduced in D68480, which shipped in macOS 11.0.
13 // XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14|15}}
14 
15 // <semaphore>
16 
17 #include <semaphore>
18 #include <thread>
19 
20 #include "make_test_thread.h"
21 #include "test_macros.h"
22 
main(int,char **)23 int main(int, char**)
24 {
25   std::counting_semaphore<> s(0);
26 
27   s.release();
28   s.acquire();
29 
30   std::thread t = support::make_test_thread([&](){
31     s.acquire();
32   });
33   s.release(2);
34   t.join();
35   s.acquire();
36 
37   return 0;
38 }
39