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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: c++03, c++11, c++14, c++17
// XFAIL: availability-synchronization_library-missing
// void detach();
#include <atomic>
#include <cassert>
#include <chrono>
#include <concepts>
#include <functional>
#include <optional>
#include <system_error>
#include <thread>
#include <type_traits>
#include "make_test_thread.h"
#include "test_macros.h"
int main(int, char**) {
// Effects: The thread represented by *this continues execution without the calling thread blocking.
{
std::atomic_bool start{false};
std::atomic_bool done{false};
std::optional<std::jthread> jt = support::make_test_jthread([&start, &done] {
start.wait(false);
done = true;
});
// If it blocks, it will deadlock here
jt->detach();
jt.reset();
// The other thread continues execution
start = true;
start.notify_all();
while (!done) {
}
}
// Postconditions: get_id() == id().
{
std::jthread jt = support::make_test_jthread([] {});
assert(jt.get_id() != std::jthread::id());
jt.detach();
assert(jt.get_id() == std::jthread::id());
}
#if !defined(TEST_HAS_NO_EXCEPTIONS)
// Throws: system_error when an exception is required ([thread.req.exception]).
// invalid_argument - if the thread is not joinable.
{
std::jthread jt;
try {
jt.detach();
assert(false);
} catch (const std::system_error& err) {
assert(err.code() == std::errc::invalid_argument);
}
}
#endif
std::this_thread::sleep_for(std::chrono::milliseconds{2});
return 0;
}
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