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1 | // Copyright (C) 2020-2021 Free Software Foundation, Inc. | |
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 "" } | |
22 | ||
23 | #include <semaphore> | |
24 | #ifdef _GLIBCXX_HAVE_POSIX_SEMAPHORE | |
25 | #include <chrono> | |
26 | #include <thread> | |
27 | #include <atomic> | |
28 | #include <testsuite_hooks.h> | |
29 | ||
30 | void test01() | |
31 | { | |
32 | using namespace std::chrono_literals; | |
33 | std::__platform_semaphore s(2); | |
34 | s._M_acquire(); | |
35 | ||
36 | auto const dur = 250ms; | |
37 | { | |
38 | auto const t0 = std::chrono::steady_clock::now(); | |
39 | VERIFY( s._M_try_acquire_for(dur) ); | |
40 | auto const diff = std::chrono::steady_clock::now() - t0; | |
41 | VERIFY( diff < dur ); | |
42 | } | |
43 | ||
44 | { | |
45 | auto const t0 = std::chrono::steady_clock::now(); | |
46 | VERIFY( !s._M_try_acquire_for(dur) ); | |
47 | auto const diff = std::chrono::steady_clock::now() - t0; | |
48 | VERIFY( diff >= dur ); | |
49 | } | |
50 | } | |
51 | ||
52 | void test02() | |
53 | { | |
54 | using namespace std::chrono_literals; | |
55 | std::__platform_semaphore s(1); | |
56 | std::atomic<int> a(0), b(0); | |
57 | std::thread t([&] { | |
58 | a.wait(0); | |
59 | auto const dur = 250ms; | |
60 | VERIFY( !s._M_try_acquire_for(dur) ); | |
61 | b++; | |
62 | b.notify_one(); | |
63 | ||
64 | a.wait(1); | |
65 | VERIFY( s._M_try_acquire_for(dur) ); | |
66 | b++; | |
67 | b.notify_one(); | |
68 | }); | |
69 | t.detach(); | |
70 | ||
71 | s._M_acquire(); | |
72 | a++; | |
73 | a.notify_one(); | |
74 | b.wait(0); | |
75 | s._M_release(1); | |
76 | a++; | |
77 | a.notify_one(); | |
78 | ||
79 | b.wait(1); | |
80 | } | |
81 | ||
82 | void test03() | |
83 | { | |
84 | using namespace std::chrono_literals; | |
85 | std::__platform_semaphore s(2); | |
86 | s._M_acquire(); | |
87 | ||
88 | auto const dur = 250ms; | |
89 | { | |
90 | auto const at = std::chrono::system_clock::now() + dur; | |
91 | auto const t0 = std::chrono::steady_clock::now(); | |
92 | VERIFY( s._M_try_acquire_until(at) ); | |
93 | auto const diff = std::chrono::steady_clock::now() - t0; | |
94 | VERIFY( diff < dur ); | |
95 | } | |
96 | ||
97 | { | |
98 | auto const at = std::chrono::system_clock::now() + dur; | |
99 | auto const t0 = std::chrono::steady_clock::now(); | |
100 | VERIFY( !s._M_try_acquire_until(at) ); | |
101 | auto const diff = std::chrono::steady_clock::now() - t0; | |
102 | VERIFY( diff >= dur ); | |
103 | } | |
104 | } | |
105 | ||
106 | void test04() | |
107 | { | |
108 | using namespace std::chrono_literals; | |
109 | std::__platform_semaphore s(1); | |
110 | std::atomic<int> a(0), b(0); | |
111 | std::thread t([&] { | |
112 | a.wait(0); | |
113 | auto const dur = 250ms; | |
114 | { | |
115 | auto const at = std::chrono::system_clock::now() + dur; | |
116 | VERIFY( !s._M_try_acquire_until(at) ); | |
117 | ||
118 | b++; | |
119 | b.notify_one(); | |
120 | } | |
121 | ||
122 | a.wait(1); | |
123 | { | |
124 | auto const at = std::chrono::system_clock::now() + dur; | |
125 | VERIFY( s._M_try_acquire_until(at) ); | |
126 | } | |
127 | b++; | |
128 | b.notify_one(); | |
129 | }); | |
130 | t.detach(); | |
131 | ||
132 | s._M_acquire(); | |
133 | a++; | |
134 | a.notify_one(); | |
135 | b.wait(0); | |
136 | s._M_release(1); | |
137 | a++; | |
138 | a.notify_one(); | |
139 | ||
140 | b.wait(1); | |
141 | } | |
142 | #endif | |
143 | ||
144 | int main() | |
145 | { | |
146 | #ifdef _GLIBCXX_HAVE_POSIX_SEMAPHORE | |
147 | test01(); | |
148 | test02(); | |
149 | test03(); | |
150 | test04(); | |
151 | #endif | |
152 | return 0; | |
153 | } |