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
24static_assert(noexcept(std::declval<std::jthread&>().request_stop()));
25
26int 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

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source code of libcxx/test/std/thread/thread.jthread/request_stop.pass.cpp