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: no-threads 10 // UNSUPPORTED: c++03, c++11, c++14, c++17 11 // XFAIL: availability-synchronization_library-missing 12 13 // [[nodiscard]] stop_token get_stop_token() const noexcept; 14 15 #include <cassert> 16 #include <concepts> 17 #include <stop_token> 18 #include <thread> 19 #include <type_traits> 20 #include <utility> 21 22 #include "make_test_thread.h" 23 #include "test_macros.h" 24 25 static_assert(noexcept(std::declval<const std::jthread&>().get_stop_token())); 26 27 int main(int, char**) { 28 // Represents a thread 29 { 30 std::jthread jt = support::make_test_jthread([] {}); 31 auto ss = jt.get_stop_source(); 32 std::same_as<std::stop_token> decltype(auto) st = std::as_const(jt).get_stop_token(); 33 34 assert(st.stop_possible()); 35 assert(!st.stop_requested()); 36 ss.request_stop(); 37 assert(st.stop_requested()); 38 } 39 40 // Does not represent a thread 41 { 42 const std::jthread jt{}; 43 std::same_as<std::stop_token> decltype(auto) st = jt.get_stop_token(); 44 45 assert(!st.stop_possible()); 46 } 47 48 return 0; 49 } 50