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83ffe9cd | 1 | // Copyright (C) 2017-2023 Free Software Foundation, Inc. |
1dd95239 VV |
2 | // |
3 | // This file is part of the GNU ISO C++ Library. This library is free | |
4 | // software; you can redistribute it and/or modify it under the | |
5 | // terms of the GNU General Public License as published by the | |
6 | // Free Software Foundation; either version 3, or (at your option) | |
7 | // any later version. | |
8 | ||
9 | // This library is distributed in the hope that it will be useful, | |
10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | // GNU General Public License for more details. | |
13 | ||
14 | // You should have received a copy of the GNU General Public License along | |
15 | // with this library; see the file COPYING3. If not see | |
16 | // <http://www.gnu.org/licenses/>. | |
17 | ||
7b936140 | 18 | // { dg-do compile { target c++17 } } |
1dd95239 | 19 | |
af181c91 JW |
20 | #include <mutex> |
21 | ||
22 | template<typename T, typename U> struct require_same; | |
23 | template<typename T> struct require_same<T, T> { using type = void; }; | |
1dd95239 | 24 | |
af181c91 JW |
25 | template<typename T, typename U> |
26 | typename require_same<T, U>::type | |
27 | check_type(U&) { } | |
28 | ||
29 | void | |
30 | test01() | |
1dd95239 | 31 | { |
af181c91 JW |
32 | std::scoped_lock l0; |
33 | check_type<std::scoped_lock<>>(l0); | |
34 | ||
35 | struct BasicLockable { | |
36 | void lock() { } | |
37 | void unlock() { } | |
38 | } m1; | |
39 | ||
40 | std::scoped_lock l1(m1); | |
41 | check_type<std::scoped_lock<BasicLockable>>(l1); | |
42 | ||
43 | struct Lockable { | |
44 | void lock() { } | |
45 | void unlock() { } | |
46 | bool try_lock() { return true; } | |
47 | } m2; | |
48 | ||
49 | std::mutex m3; | |
50 | std::scoped_lock l2(m2, m3); | |
51 | check_type<std::scoped_lock<Lockable, std::mutex>>(l2); | |
1dd95239 | 52 | } |
e12d3780 JW |
53 | |
54 | void | |
55 | test02() | |
56 | { | |
57 | std::scoped_lock l0(std::adopt_lock); | |
58 | check_type<std::scoped_lock<>>(l0); | |
59 | ||
60 | struct BasicLockable { | |
61 | void lock() { } | |
62 | void unlock() { } | |
63 | } m1; | |
64 | ||
65 | std::scoped_lock l1(std::adopt_lock, m1); | |
66 | check_type<std::scoped_lock<BasicLockable>>(l1); | |
67 | ||
68 | struct Lockable { | |
69 | void lock() { } | |
70 | void unlock() { } | |
71 | bool try_lock() { return true; } | |
72 | } m2; | |
73 | ||
74 | std::mutex m3; | |
75 | std::scoped_lock l2(std::adopt_lock, m2, m3); | |
76 | check_type<std::scoped_lock<Lockable, std::mutex>>(l2); | |
77 | } |