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, which shipped in
13 // macOS 11.0.
14 // XFAIL: use_system_cxx_lib && x86_64-apple-macosx10.15
15 // XFAIL: use_system_cxx_lib && x86_64-apple-macosx10.14
16 // XFAIL: use_system_cxx_lib && x86_64-apple-macosx10.13
17 // XFAIL: use_system_cxx_lib && x86_64-apple-macosx10.12
18 // XFAIL: use_system_cxx_lib && x86_64-apple-macosx10.11
19 // XFAIL: use_system_cxx_lib && x86_64-apple-macosx10.10
20 // XFAIL: use_system_cxx_lib && x86_64-apple-macosx10.9
21 
22 // <semaphore>
23 
24 #include <semaphore>
25 #include <thread>
26 #include <chrono>
27 #include <cassert>
28 
29 #include "make_test_thread.h"
30 #include "test_macros.h"
31 
32 int main(int, char**)
33 {
34   auto const start = std::chrono::steady_clock::now();
35 
36   std::counting_semaphore<> s(0);
37 
38   assert(!s.try_acquire_until(start + std::chrono::milliseconds(250)));
39   assert(!s.try_acquire_for(std::chrono::milliseconds(250)));
40 
41   std::thread t = support::make_test_thread([&](){
42     std::this_thread::sleep_for(std::chrono::milliseconds(250));
43     s.release();
44     std::this_thread::sleep_for(std::chrono::milliseconds(250));
45     s.release();
46   });
47 
48   assert(s.try_acquire_until(start + std::chrono::seconds(2)));
49   assert(s.try_acquire_for(std::chrono::seconds(2)));
50   t.join();
51 
52   auto const end = std::chrono::steady_clock::now();
53   assert(end - start < std::chrono::seconds(10));
54 
55   return 0;
56 }
57