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++03, c++11
11 
12 // This test requires the dylib support introduced in D68480,
13 // which hasn't shipped yet.
14 // XFAIL: with_system_cxx_lib=macosx
15 // XFAIL: with_system_cxx_lib=macosx10.15
16 // XFAIL: with_system_cxx_lib=macosx10.14
17 // XFAIL: with_system_cxx_lib=macosx10.13
18 // XFAIL: with_system_cxx_lib=macosx10.12
19 // XFAIL: with_system_cxx_lib=macosx10.11
20 // XFAIL: with_system_cxx_lib=macosx10.10
21 // XFAIL: with_system_cxx_lib=macosx10.9
22 
23 // <semaphore>
24 
25 #include <semaphore>
26 #include <thread>
27 #include <chrono>
28 
29 #include "test_macros.h"
30 
31 int main(int, char**)
32 {
33   auto const start = std::chrono::steady_clock::now();
34 
35   std::counting_semaphore<> s(0);
36 
37   assert(!s.try_acquire_until(start + std::chrono::milliseconds(250)));
38   assert(!s.try_acquire_for(std::chrono::milliseconds(250)));
39 
40   std::thread t([&](){
41     std::this_thread::sleep_for(std::chrono::milliseconds(250));
42     s.release();
43     std::this_thread::sleep_for(std::chrono::milliseconds(250));
44     s.release();
45   });
46 
47   assert(s.try_acquire_until(start + std::chrono::seconds(2)));
48   assert(s.try_acquire_for(std::chrono::seconds(2)));
49   t.join();
50 
51   auto const end = std::chrono::steady_clock::now();
52   assert(end - start < std::chrono::seconds(10));
53 
54   return 0;
55 }
56