1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // <condition_variable>
11 
12 // class condition_variable_any;
13 
14 // template <class Lock, class Predicate>
15 //   void wait(Lock& lock, Predicate pred);
16 
17 #include <condition_variable>
18 #include <mutex>
19 #include <thread>
20 #include <functional>
21 #include <cassert>
22 
23 std::condition_variable_any cv;
24 
25 typedef std::timed_mutex L0;
26 typedef std::unique_lock<L0> L1;
27 
28 L0 m0;
29 
30 int test1 = 0;
31 int test2 = 0;
32 
33 class Pred
34 {
35     int& i_;
36 public:
Pred(int & i)37     explicit Pred(int& i) : i_(i) {}
38 
operator ()()39     bool operator()() {return i_ != 0;}
40 };
41 
f()42 void f()
43 {
44     L1 lk(m0);
45     assert(test2 == 0);
46     test1 = 1;
47     cv.notify_one();
48     cv.wait(lk, Pred(test2));
49     assert(test2 != 0);
50 }
51 
main()52 int main()
53 {
54     L1 lk(m0);
55     std::thread t(f);
56     assert(test1 == 0);
57     while (test1 == 0)
58         cv.wait(lk);
59     assert(test1 != 0);
60     test2 = 1;
61     lk.unlock();
62     cv.notify_one();
63     t.join();
64 }
65