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      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 // void
     13 //   notify_all_at_thread_exit(condition_variable& cond, unique_lock<mutex> lk);
     14 
     15 #include <condition_variable>
     16 #include <mutex>
     17 #include <thread>
     18 #include <chrono>
     19 #include <cassert>
     20 
     21 std::condition_variable cv;
     22 std::mutex mut;
     23 
     24 typedef std::chrono::milliseconds ms;
     25 typedef std::chrono::high_resolution_clock Clock;
     26 
     27 void func()
     28 {
     29     std::unique_lock<std::mutex> lk(mut);
     30     std::notify_all_at_thread_exit(cv, std::move(lk));
     31     std::this_thread::sleep_for(ms(300));
     32 }
     33 
     34 int main()
     35 {
     36     std::unique_lock<std::mutex> lk(mut);
     37     std::thread(func).detach();
     38     Clock::time_point t0 = Clock::now();
     39     cv.wait(lk);
     40     Clock::time_point t1 = Clock::now();
     41     assert(t1-t0 > ms(250));
     42 }
     43