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 // UNSUPPORTED: libcpp-has-no-threads
11 
12 // notify_all_at_thread_exit(...) requires move semantics to transfer the
13 // unique_lock.
14 // UNSUPPORTED: c++98, c++03
15 
16 // <condition_variable>
17 
18 // void
19 //   notify_all_at_thread_exit(condition_variable& cond, unique_lock<mutex> lk);
20 
21 #include <condition_variable>
22 #include <mutex>
23 #include <thread>
24 #include <chrono>
25 #include <cassert>
26 
27 std::condition_variable cv;
28 std::mutex mut;
29 
30 typedef std::chrono::milliseconds ms;
31 typedef std::chrono::high_resolution_clock Clock;
32 
func()33 void func()
34 {
35     std::unique_lock<std::mutex> lk(mut);
36     std::notify_all_at_thread_exit(cv, std::move(lk));
37     std::this_thread::sleep_for(ms(300));
38 }
39 
main()40 int main()
41 {
42     std::unique_lock<std::mutex> lk(mut);
43     std::thread t(func);
44     Clock::time_point t0 = Clock::now();
45     cv.wait(lk);
46     Clock::time_point t1 = Clock::now();
47     assert(t1-t0 > ms(250));
48     t.join();
49 }
50