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]] bool request_stop() noexcept; 14 15 #include <cassert> 16 #include <concepts> 17 #include <stop_token> 18 #include <thread> 19 #include <type_traits> 20 21 #include "make_test_thread.h" 22 #include "test_macros.h" 23 24 static_assert(noexcept(std::declval<std::jthread&>().request_stop())); 25 26 int main(int, char**) { 27 // Represents a thread 28 { 29 std::jthread jt = support::make_test_jthread([] {}); 30 auto st = jt.get_stop_token(); 31 assert(!st.stop_requested()); 32 std::same_as<bool> decltype(auto) result = jt.request_stop(); 33 assert(result); 34 assert(st.stop_requested()); 35 } 36 37 // Does not represent a thread 38 { 39 std::jthread jt{}; 40 std::same_as<bool> decltype(auto) result = jt.request_stop(); 41 assert(!result); 42 } 43 44 return 0; 45 } 46