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 | // void detach(); |
14 | |
15 | #include <atomic> |
16 | #include <cassert> |
17 | #include <chrono> |
18 | #include <concepts> |
19 | #include <functional> |
20 | #include <optional> |
21 | #include <system_error> |
22 | #include <thread> |
23 | #include <type_traits> |
24 | |
25 | #include "make_test_thread.h" |
26 | #include "test_macros.h" |
27 | |
28 | int main(int, char**) { |
29 | // Effects: The thread represented by *this continues execution without the calling thread blocking. |
30 | { |
31 | std::atomic_bool start{false}; |
32 | std::atomic_bool done{false}; |
33 | std::optional<std::jthread> jt = support::make_test_jthread([&start, &done] { |
34 | start.wait(false); |
35 | done = true; |
36 | }); |
37 | |
38 | // If it blocks, it will deadlock here |
39 | jt->detach(); |
40 | |
41 | jt.reset(); |
42 | |
43 | // The other thread continues execution |
44 | start = true; |
45 | start.notify_all(); |
46 | while (!done) { |
47 | } |
48 | } |
49 | |
50 | // Postconditions: get_id() == id(). |
51 | { |
52 | std::jthread jt = support::make_test_jthread([] {}); |
53 | assert(jt.get_id() != std::jthread::id()); |
54 | jt.detach(); |
55 | assert(jt.get_id() == std::jthread::id()); |
56 | } |
57 | |
58 | #if !defined(TEST_HAS_NO_EXCEPTIONS) |
59 | // Throws: system_error when an exception is required ([thread.req.exception]). |
60 | // invalid_argument - if the thread is not joinable. |
61 | { |
62 | std::jthread jt; |
63 | try { |
64 | jt.detach(); |
65 | assert(false); |
66 | } catch (const std::system_error& err) { |
67 | assert(err.code() == std::errc::invalid_argument); |
68 | } |
69 | } |
70 | #endif |
71 | |
72 | std::this_thread::sleep_for(rtime: std::chrono::milliseconds{2}); |
73 | return 0; |
74 | } |
75 |