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 && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14|15}} 15 16 // TODO(ldionne): This test fails on Ubuntu Focal on our CI nodes (and only there), in 32 bit mode. 17 // UNSUPPORTED: linux && 32bits-on-64bits 18 19 // <semaphore> 20 21 #include <semaphore> 22 #include <chrono> 23 #include <thread> 24 #include <type_traits> 25 26 #include "make_test_thread.h" 27 #include "test_macros.h" 28 29 static_assert(std::is_same<std::binary_semaphore, std::counting_semaphore<1>>::value, ""); 30 31 int main(int, char**) 32 { 33 std::binary_semaphore s(1); 34 35 auto l = [&](){ 36 for(int i = 0; i < 1024; ++i) { 37 s.acquire(); 38 std::this_thread::sleep_for(std::chrono::microseconds(1)); 39 s.release(); 40 } 41 }; 42 43 std::thread t = support::make_test_thread(l); 44 l(); 45 46 t.join(); 47 48 return 0; 49 } 50