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 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 #include <chrono> 20 #include <cassert> 21 22 #include "make_test_thread.h" 23 #include "test_macros.h" 24 25 int main(int, char**) 26 { 27 auto const start = std::chrono::steady_clock::now(); 28 29 std::counting_semaphore<> s(0); 30 31 assert(!s.try_acquire_until(start + std::chrono::milliseconds(250))); 32 assert(!s.try_acquire_for(std::chrono::milliseconds(250))); 33 34 std::thread t = support::make_test_thread([&](){ 35 std::this_thread::sleep_for(std::chrono::milliseconds(250)); 36 s.release(); 37 std::this_thread::sleep_for(std::chrono::milliseconds(250)); 38 s.release(); 39 }); 40 41 assert(s.try_acquire_until(start + std::chrono::seconds(2))); 42 assert(s.try_acquire_for(std::chrono::seconds(2))); 43 t.join(); 44 45 auto const end = std::chrono::steady_clock::now(); 46 assert(end - start < std::chrono::seconds(10)); 47 48 return 0; 49 } 50