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 // notify_all_at_thread_exit(...) requires move semantics to transfer the
12 // unique_lock.
13 // UNSUPPORTED: c++98, c++03
14 
15 // <condition_variable>
16 
17 // void
18 //   notify_all_at_thread_exit(condition_variable& cond, unique_lock<mutex> lk);
19 
20 #include <condition_variable>
21 #include <mutex>
22 #include <thread>
23 #include <chrono>
24 #include <cassert>
25 
26 std::condition_variable cv;
27 std::mutex mut;
28 
29 typedef std::chrono::milliseconds ms;
30 typedef std::chrono::high_resolution_clock Clock;
31 
32 void func()
33 {
34     std::unique_lock<std::mutex> lk(mut);
35     std::notify_all_at_thread_exit(cv, std::move(lk));
36     std::this_thread::sleep_for(ms(300));
37 }
38 
39 int main(int, char**)
40 {
41     std::unique_lock<std::mutex> lk(mut);
42     std::thread t(func);
43     Clock::time_point t0 = Clock::now();
44     cv.wait(lk);
45     Clock::time_point t1 = Clock::now();
46     assert(t1-t0 > ms(250));
47     t.join();
48 
49   return 0;
50 }
51