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 // stop_source(const stop_source&) noexcept; 14 15 #include <cassert> 16 #include <optional> 17 #include <stop_token> 18 #include <type_traits> 19 20 #include "test_macros.h" 21 22 static_assert(std::is_nothrow_copy_constructible_v<std::stop_source>); 23 24 int main(int, char**) { 25 { 26 std::stop_source source; 27 std::stop_source copy{source}; 28 29 assert(source == copy); 30 31 assert(source.stop_possible()); 32 assert(!source.stop_requested()); 33 34 assert(copy.stop_possible()); 35 assert(!copy.stop_requested()); 36 37 source.request_stop(); 38 assert(source.stop_possible()); 39 assert(source.stop_requested()); 40 41 assert(copy.stop_possible()); 42 assert(copy.stop_requested()); 43 } 44 45 // source counter incremented 46 { 47 std::optional<std::stop_source> source(std::in_place); 48 auto st = source->get_token(); 49 assert(st.stop_possible()); 50 51 std::optional<std::stop_source> copy{source}; 52 source.reset(); 53 54 assert(st.stop_possible()); 55 56 copy.reset(); 57 assert(!st.stop_possible()); 58 } 59 60 // copy from empty 61 { 62 std::stop_source ss1{std::nostopstate}; 63 std::stop_source copy{ss1}; 64 assert(!copy.stop_possible()); 65 } 66 67 return 0; 68 } 69