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 Rep, class Period> 15 // cv_status 16 // wait_for(Lock& lock, const chrono::duration<Rep, Period>& rel_time); 17 18 #include <condition_variable> 19 #include <mutex> 20 #include <thread> 21 #include <chrono> 22 #include <cassert> 23 24 std::condition_variable_any cv; 25 26 typedef std::timed_mutex L0; 27 typedef std::unique_lock<L0> L1; 28 29 L0 m0; 30 31 int test1 = 0; 32 int test2 = 0; 33 34 int runs = 0; 35 36 void f() 37 { 38 typedef std::chrono::system_clock Clock; 39 typedef std::chrono::milliseconds milliseconds; 40 L1 lk(m0); 41 assert(test2 == 0); 42 test1 = 1; 43 cv.notify_one(); 44 Clock::time_point t0 = Clock::now(); 45 while (test2 == 0 && 46 cv.wait_for(lk, milliseconds(250)) == std::cv_status::no_timeout) 47 ; 48 Clock::time_point t1 = Clock::now(); 49 if (runs == 0) 50 { 51 assert(t1 - t0 < milliseconds(250)); 52 assert(test2 != 0); 53 } 54 else 55 { 56 assert(t1 - t0 - milliseconds(250) < milliseconds(50)); 57 assert(test2 == 0); 58 } 59 ++runs; 60 } 61 62 int main() 63 { 64 { 65 L1 lk(m0); 66 std::thread t(f); 67 assert(test1 == 0); 68 while (test1 == 0) 69 cv.wait(lk); 70 assert(test1 != 0); 71 test2 = 1; 72 lk.unlock(); 73 cv.notify_one(); 74 t.join(); 75 } 76 test1 = 0; 77 test2 = 0; 78 { 79 L1 lk(m0); 80 std::thread t(f); 81 assert(test1 == 0); 82 while (test1 == 0) 83 cv.wait(lk); 84 assert(test1 != 0); 85 lk.unlock(); 86 t.join(); 87 } 88 } 89
