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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: no-threads
// UNSUPPORTED: libcpp-has-no-experimental-stop_token
// UNSUPPORTED: c++03, c++11, c++14, c++17
// XFAIL: availability-synchronization_library-missing
// [[nodiscard]] bool joinable() const noexcept;
#include <atomic>
#include <cassert>
#include <concepts>
#include <thread>
#include <type_traits>
#include "make_test_thread.h"
#include "test_macros.h"
static_assert(noexcept(std::declval<const std::jthread&>().joinable()));
int main(int, char**) {
// Default constructed
{
const std::jthread jt;
std::same_as<bool> decltype(auto) result = jt.joinable();
assert(!result);
}
// Non-default constructed
{
const std::jthread jt = support::make_test_jthread([] {});
std::same_as<bool> decltype(auto) result = jt.joinable();
assert(result);
}
// Non-default constructed
// the thread of execution has not finished
{
std::atomic_bool done = false;
const std::jthread jt = support::make_test_jthread([&done] { done.wait(false); });
std::same_as<bool> decltype(auto) result = jt.joinable();
done = true;
done.notify_all();
assert(result);
}
return 0;
}
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