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7adcbafe | 1 | // Copyright (C) 2020-2022 Free Software Foundation, Inc. |
83a1beee TR |
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 | ||
18 | // { dg-options "-std=gnu++2a -pthread" } | |
19 | // { dg-do run { target c++2a } } | |
20 | // { dg-require-effective-target pthread } | |
21 | // { dg-require-gthreads "" } | |
58871c03 | 22 | // { dg-add-options libatomic } |
83a1beee TR |
23 | |
24 | #include <semaphore> | |
25 | #ifdef _GLIBCXX_HAVE_POSIX_SEMAPHORE | |
26 | #include <chrono> | |
27 | #include <thread> | |
28 | #include <atomic> | |
29 | #include <testsuite_hooks.h> | |
30 | ||
31 | void test01() | |
32 | { | |
33 | using namespace std::chrono_literals; | |
34 | std::__platform_semaphore s(2); | |
35 | s._M_acquire(); | |
36 | ||
37 | auto const dur = 250ms; | |
38 | { | |
39 | auto const t0 = std::chrono::steady_clock::now(); | |
40 | VERIFY( s._M_try_acquire_for(dur) ); | |
41 | auto const diff = std::chrono::steady_clock::now() - t0; | |
42 | VERIFY( diff < dur ); | |
43 | } | |
44 | ||
45 | { | |
46 | auto const t0 = std::chrono::steady_clock::now(); | |
47 | VERIFY( !s._M_try_acquire_for(dur) ); | |
48 | auto const diff = std::chrono::steady_clock::now() - t0; | |
49 | VERIFY( diff >= dur ); | |
50 | } | |
51 | } | |
52 | ||
53 | void test02() | |
54 | { | |
55 | using namespace std::chrono_literals; | |
56 | std::__platform_semaphore s(1); | |
57 | std::atomic<int> a(0), b(0); | |
58 | std::thread t([&] { | |
59 | a.wait(0); | |
60 | auto const dur = 250ms; | |
61 | VERIFY( !s._M_try_acquire_for(dur) ); | |
62 | b++; | |
63 | b.notify_one(); | |
64 | ||
65 | a.wait(1); | |
66 | VERIFY( s._M_try_acquire_for(dur) ); | |
67 | b++; | |
68 | b.notify_one(); | |
69 | }); | |
70 | t.detach(); | |
71 | ||
72 | s._M_acquire(); | |
73 | a++; | |
74 | a.notify_one(); | |
75 | b.wait(0); | |
76 | s._M_release(1); | |
77 | a++; | |
78 | a.notify_one(); | |
79 | ||
80 | b.wait(1); | |
81 | } | |
82 | ||
83 | void test03() | |
84 | { | |
85 | using namespace std::chrono_literals; | |
86 | std::__platform_semaphore s(2); | |
87 | s._M_acquire(); | |
88 | ||
89 | auto const dur = 250ms; | |
90 | { | |
91 | auto const at = std::chrono::system_clock::now() + dur; | |
92 | auto const t0 = std::chrono::steady_clock::now(); | |
93 | VERIFY( s._M_try_acquire_until(at) ); | |
94 | auto const diff = std::chrono::steady_clock::now() - t0; | |
95 | VERIFY( diff < dur ); | |
96 | } | |
97 | ||
98 | { | |
99 | auto const at = std::chrono::system_clock::now() + dur; | |
100 | auto const t0 = std::chrono::steady_clock::now(); | |
101 | VERIFY( !s._M_try_acquire_until(at) ); | |
102 | auto const diff = std::chrono::steady_clock::now() - t0; | |
103 | VERIFY( diff >= dur ); | |
104 | } | |
105 | } | |
106 | ||
107 | void test04() | |
108 | { | |
109 | using namespace std::chrono_literals; | |
110 | std::__platform_semaphore s(1); | |
111 | std::atomic<int> a(0), b(0); | |
112 | std::thread t([&] { | |
113 | a.wait(0); | |
114 | auto const dur = 250ms; | |
115 | { | |
116 | auto const at = std::chrono::system_clock::now() + dur; | |
117 | VERIFY( !s._M_try_acquire_until(at) ); | |
118 | ||
119 | b++; | |
120 | b.notify_one(); | |
121 | } | |
122 | ||
123 | a.wait(1); | |
124 | { | |
125 | auto const at = std::chrono::system_clock::now() + dur; | |
126 | VERIFY( s._M_try_acquire_until(at) ); | |
127 | } | |
128 | b++; | |
129 | b.notify_one(); | |
130 | }); | |
131 | t.detach(); | |
132 | ||
133 | s._M_acquire(); | |
134 | a++; | |
135 | a.notify_one(); | |
136 | b.wait(0); | |
137 | s._M_release(1); | |
138 | a++; | |
139 | a.notify_one(); | |
140 | ||
141 | b.wait(1); | |
142 | } | |
143 | #endif | |
144 | ||
145 | int main() | |
146 | { | |
147 | #ifdef _GLIBCXX_HAVE_POSIX_SEMAPHORE | |
148 | test01(); | |
149 | test02(); | |
150 | test03(); | |
151 | test04(); | |
152 | #endif | |
153 | return 0; | |
154 | } |