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 <chrono> 19 #include <thread> 20 #include <type_traits> 21 22 #include "make_test_thread.h" 23 #include "test_macros.h" 24 25 static_assert(std::is_same<std::binary_semaphore, std::counting_semaphore<1>>::value, ""); 26 27 int main(int, char**) 28 { 29 std::binary_semaphore s(1); 30 31 auto l = [&](){ 32 for(int i = 0; i < 1024; ++i) { 33 s.acquire(); 34 std::this_thread::sleep_for(std::chrono::microseconds(1)); 35 s.release(); 36 } 37 }; 38 39 std::thread t = support::make_test_thread(l); 40 l(); 41 42 t.join(); 43 44 return 0; 45 } 46