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: libcpp-has-no-threads
10 
11 // <condition_variable>
12 
13 // class condition_variable_any;
14 
15 // template <class Lock, class Predicate>
16 //   void wait(Lock& lock, Predicate pred);
17 
18 #include <condition_variable>
19 #include <mutex>
20 #include <thread>
21 #include <functional>
22 #include <cassert>
23 
24 #include "test_macros.h"
25 
26 std::condition_variable_any cv;
27 
28 typedef std::timed_mutex L0;
29 typedef std::unique_lock<L0> L1;
30 
31 L0 m0;
32 
33 int test1 = 0;
34 int test2 = 0;
35 
36 class Pred
37 {
38     int& i_;
39 public:
40     explicit Pred(int& i) : i_(i) {}
41 
42     bool operator()() {return i_ != 0;}
43 };
44 
45 void f()
46 {
47     L1 lk(m0);
48     assert(test2 == 0);
49     test1 = 1;
50     cv.notify_one();
51     cv.wait(lk, Pred(test2));
52     assert(test2 != 0);
53 }
54 
55 int main(int, char**)
56 {
57     L1 lk(m0);
58     std::thread t(f);
59     assert(test1 == 0);
60     while (test1 == 0)
61         cv.wait(lk);
62     assert(test1 != 0);
63     test2 = 1;
64     lk.unlock();
65     cv.notify_one();
66     t.join();
67 
68   return 0;
69 }
70