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++98, c++03, c++11 11 12 // This test requires the dylib support introduced in D68480 13 // XFAIL: with_system_cxx_lib=macosx10.15 14 // XFAIL: with_system_cxx_lib=macosx10.14 15 // XFAIL: with_system_cxx_lib=macosx10.13 16 // XFAIL: with_system_cxx_lib=macosx10.12 17 // XFAIL: with_system_cxx_lib=macosx10.11 18 // XFAIL: with_system_cxx_lib=macosx10.10 19 // XFAIL: with_system_cxx_lib=macosx10.9 20 21 // <semaphore> 22 23 #include <semaphore> 24 #include <thread> 25 26 #include "test_macros.h" 27 28 int main(int, char**) 29 { 30 std::counting_semaphore<> s(1); 31 32 assert(s.try_acquire()); 33 s.release(); 34 assert(s.try_acquire()); 35 s.release(2); 36 std::thread t([&](){ 37 assert(s.try_acquire()); 38 }); 39 t.join(); 40 assert(s.try_acquire()); 41 42 return 0; 43 } 44