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 <thread> 22 #include <chrono> 23 #include <cassert> 24 25 #include "make_test_thread.h" 26 #include "test_macros.h" 27 28 int main(int, char**) 29 { 30 auto const start = std::chrono::steady_clock::now(); 31 32 std::counting_semaphore<> s(0); 33 34 assert(!s.try_acquire_until(start + std::chrono::milliseconds(250))); 35 assert(!s.try_acquire_for(std::chrono::milliseconds(250))); 36 37 std::thread t = support::make_test_thread([&](){ 38 std::this_thread::sleep_for(std::chrono::milliseconds(250)); 39 s.release(); 40 std::this_thread::sleep_for(std::chrono::milliseconds(250)); 41 s.release(); 42 }); 43 44 assert(s.try_acquire_until(start + std::chrono::seconds(2))); 45 assert(s.try_acquire_for(std::chrono::seconds(2))); 46 t.join(); 47 48 auto const end = std::chrono::steady_clock::now(); 49 assert(end - start < std::chrono::seconds(10)); 50 51 return 0; 52 } 53