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 // <condition_variable> 13 14 // class condition_variable_any; 15 16 // template <class Lock, class Predicate> 17 // void wait(Lock& lock, Predicate pred); 18 19 #include <condition_variable> 20 #include <mutex> 21 #include <thread> 22 #include <functional> 23 #include <cassert> 24 25 std::condition_variable_any cv; 26 27 typedef std::timed_mutex L0; 28 typedef std::unique_lock<L0> L1; 29 30 L0 m0; 31 32 int test1 = 0; 33 int test2 = 0; 34 35 class Pred 36 { 37 int& i_; 38 public: 39 explicit Pred(int& i) : i_(i) {} 40 41 bool operator()() {return i_ != 0;} 42 }; 43 44 void f() 45 { 46 L1 lk(m0); 47 assert(test2 == 0); 48 test1 = 1; 49 cv.notify_one(); 50 cv.wait(lk, Pred(test2)); 51 assert(test2 != 0); 52 } 53 54 int main() 55 { 56 L1 lk(m0); 57 std::thread t(f); 58 assert(test1 == 0); 59 while (test1 == 0) 60 cv.wait(lk); 61 assert(test1 != 0); 62 test2 = 1; 63 lk.unlock(); 64 cv.notify_one(); 65 t.join(); 66 } 67
