| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <condition_variable> |
| |
| // class condition_variable; |
| |
| // void wait(unique_lock<mutex>& lock); |
| |
| #include <condition_variable> |
| #include <mutex> |
| #include <thread> |
| #include <cassert> |
| |
| std::condition_variable cv; |
| std::mutex mut; |
| |
| int test1 = 0; |
| int test2 = 0; |
| |
| void f() |
| { |
| std::unique_lock<std::mutex> lk(mut); |
| assert(test2 == 0); |
| test1 = 1; |
| cv.notify_one(); |
| while (test2 == 0) |
| cv.wait(lk); |
| assert(test2 != 0); |
| } |
| |
| int main() |
| { |
| std::unique_lock<std::mutex>lk(mut); |
| std::thread t(f); |
| assert(test1 == 0); |
| while (test1 == 0) |
| cv.wait(lk); |
| assert(test1 != 0); |
| test2 = 1; |
| lk.unlock(); |
| cv.notify_one(); |
| t.join(); |
| } |