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 Predicate>
17// void wait(Lock& lock, Predicate pred);
18
19#include <condition_variable>
20#include <mutex>
21#include <thread>
22#include <functional>
23#include <cassert>
24
25#include "make_test_thread.h"
26#include "test_macros.h"
27
28std::condition_variable_any cv;
29
30typedef std::timed_mutex L0;
31typedef std::unique_lock<L0> L1;
32
33L0 m0;
34
35int test1 = 0;
36int test2 = 0;
37
38class Pred
39{
40 int& i_;
41public:
42 explicit Pred(int& i) : i_(i) {}
43
44 bool operator()() {return i_ != 0;}
45};
46
47void f()
48{
49 L1 lk(m0);
50 assert(test2 == 0);
51 test1 = 1;
52 cv.notify_one();
53 cv.wait(lock&: lk, p: Pred(test2));
54 assert(test2 != 0);
55}
56
57int main(int, char**)
58{
59 L1 lk(m0);
60 std::thread t = support::make_test_thread(f);
61 assert(test1 == 0);
62 while (test1 == 0)
63 cv.wait(lock&: lk);
64 assert(test1 != 0);
65 test2 = 1;
66 lk.unlock();
67 cv.notify_one();
68 t.join();
69
70 return 0;
71}
72

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