| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // UNSUPPORTED: no-threads |
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| 10 | // UNSUPPORTED: libcpp-has-no-experimental-stop_token |
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| 11 | // UNSUPPORTED: c++03, c++11, c++14, c++17 |
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| 12 | // XFAIL: availability-synchronization_library-missing |
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| 13 | |
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| 14 | // [[nodiscard]] bool request_stop() noexcept; |
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| 15 | |
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| 16 | #include <cassert> |
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| 17 | #include <concepts> |
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| 18 | #include <stop_token> |
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| 19 | #include <thread> |
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| 20 | #include <type_traits> |
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| 21 | |
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| 22 | #include "make_test_thread.h" |
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| 23 | #include "test_macros.h" |
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| 24 | |
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| 25 | static_assert(noexcept(std::declval<std::jthread&>().request_stop())); |
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| 26 | |
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| 27 | int main(int, char**) { |
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| 28 | // Represents a thread |
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| 29 | { |
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| 30 | std::jthread jt = support::make_test_jthread([] {}); |
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| 31 | auto st = jt.get_stop_token(); |
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| 32 | assert(!st.stop_requested()); |
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| 33 | std::same_as<bool> decltype(auto) result = jt.request_stop(); |
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| 34 | assert(result); |
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| 35 | assert(st.stop_requested()); |
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| 36 | } |
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| 37 | |
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| 38 | // Does not represent a thread |
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| 39 | { |
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| 40 | std::jthread jt{}; |
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| 41 | std::same_as<bool> decltype(auto) result = jt.request_stop(); |
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| 42 | assert(!result); |
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| 43 | } |
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| 44 | |
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| 45 | return 0; |
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| 46 | } |
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| 47 | |
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