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 // This test requires the dylib support introduced in D68480
13 // XFAIL: with_system_cxx_lib=macosx10.15
14 // XFAIL: with_system_cxx_lib=macosx10.14
15 // XFAIL: with_system_cxx_lib=macosx10.13
16 // XFAIL: with_system_cxx_lib=macosx10.12
17 // XFAIL: with_system_cxx_lib=macosx10.11
18 // XFAIL: with_system_cxx_lib=macosx10.10
19 // XFAIL: with_system_cxx_lib=macosx10.9
20 
21 // <semaphore>
22 
23 #include <semaphore>
24 #include <chrono>
25 #include <thread>
26 
27 #include "test_macros.h"
28 
29 int main(int, char**)
30 {
31   std::binary_semaphore s(1);
32 
33   auto l = [&](){
34     for(int i = 0; i < 1024; ++i) {
35         s.acquire();
36         std::this_thread::sleep_for(std::chrono::microseconds(1));
37         s.release();
38     }
39   };
40 
41   std::thread t(l);
42   l();
43 
44   t.join();
45 
46   return 0;
47 }
48