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// ALLOW_RETRIES: 2
11
12// <condition_variable>
13
14// class condition_variable_any;
15
16// template <class Lock, class Rep, class Period>
17// cv_status
18// wait_for(Lock& lock, const chrono::duration<Rep, Period>& rel_time);
19
20#include <condition_variable>
21#include <mutex>
22#include <thread>
23#include <chrono>
24#include <cassert>
25
26#include "make_test_thread.h"
27#include "test_macros.h"
28
29std::condition_variable_any cv;
30
31typedef std::timed_mutex L0;
32typedef std::unique_lock<L0> L1;
33
34L0 m0;
35
36int test1 = 0;
37int test2 = 0;
38
39bool expect_timeout = false;
40
41void f()
42{
43 typedef std::chrono::system_clock Clock;
44 typedef std::chrono::milliseconds milliseconds;
45 L1 lk(m0);
46 assert(test2 == 0);
47 test1 = 1;
48 cv.notify_one();
49 Clock::time_point t0 = Clock::now();
50 Clock::time_point wait_end = t0 + milliseconds(250);
51 Clock::duration d;
52 do {
53 d = wait_end - Clock::now();
54 if (d <= milliseconds(0)) break;
55 } while (test2 == 0 && cv.wait_for(lock&: lk, rtime: d) == std::cv_status::no_timeout);
56 Clock::time_point t1 = Clock::now();
57 if (!expect_timeout)
58 {
59 assert(t1 - t0 < milliseconds(250));
60 assert(test2 != 0);
61 }
62 else
63 {
64 assert(t1 - t0 - milliseconds(250) < milliseconds(50));
65 assert(test2 == 0);
66 }
67}
68
69int main(int, char**)
70{
71 {
72 L1 lk(m0);
73 std::thread t = support::make_test_thread(f);
74 assert(test1 == 0);
75 while (test1 == 0)
76 cv.wait(lock&: lk);
77 assert(test1 != 0);
78 test2 = 1;
79 lk.unlock();
80 cv.notify_one();
81 t.join();
82 }
83 test1 = 0;
84 test2 = 0;
85 expect_timeout = true;
86 {
87 L1 lk(m0);
88 std::thread t = support::make_test_thread(f);
89 assert(test1 == 0);
90 while (test1 == 0)
91 cv.wait(lock&: lk);
92 assert(test1 != 0);
93 lk.unlock();
94 t.join();
95 }
96
97 return 0;
98}
99

source code of libcxx/test/std/thread/thread.condition/thread.condition.condvarany/wait_for.pass.cpp