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; 13 14 // ~condition_variable(); 15 16 #include <condition_variable> 17 #include <mutex> 18 #include <thread> 19 #include <cassert> 20 21 std::condition_variable* cv; 22 std::mutex m; 23 typedef std::unique_lock<std::mutex> Lock; 24 25 bool f_ready = false; 26 bool g_ready = false; 27 28 void f() 29 { 30 Lock lk(m); 31 f_ready = true; 32 cv->notify_one(); 33 delete cv; 34 } 35 36 void g() 37 { 38 Lock lk(m); 39 g_ready = true; 40 cv->notify_one(); 41 while (!f_ready) 42 cv->wait(lk); 43 } 44 45 int main() 46 { 47 cv = new std::condition_variable; 48 std::thread th2(g); 49 Lock lk(m); 50 while (!g_ready) 51 cv->wait(lk); 52 lk.unlock(); 53 std::thread th1(f); 54 th1.join(); 55 th2.join(); 56 } 57
