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