| 1 | //===----------------------------------------------------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | // |
| 9 | // UNSUPPORTED: no-threads |
| 10 | |
| 11 | // <condition_variable> |
| 12 | |
| 13 | // class condition_variable; |
| 14 | |
| 15 | // void wait(unique_lock<mutex>& lock); |
| 16 | |
| 17 | #include <condition_variable> |
| 18 | #include <mutex> |
| 19 | #include <thread> |
| 20 | #include <cassert> |
| 21 | |
| 22 | #include "make_test_thread.h" |
| 23 | #include "test_macros.h" |
| 24 | |
| 25 | std::condition_variable cv; |
| 26 | std::mutex mut; |
| 27 | |
| 28 | int test1 = 0; |
| 29 | int test2 = 0; |
| 30 | |
| 31 | void f() |
| 32 | { |
| 33 | std::unique_lock<std::mutex> lk(mut); |
| 34 | assert(test2 == 0); |
| 35 | test1 = 1; |
| 36 | cv.notify_one(); |
| 37 | while (test2 == 0) |
| 38 | cv.wait(lock&: lk); |
| 39 | assert(test2 != 0); |
| 40 | } |
| 41 | |
| 42 | int main(int, char**) |
| 43 | { |
| 44 | std::unique_lock<std::mutex> lk(mut); |
| 45 | std::thread t = support::make_test_thread(f); |
| 46 | assert(test1 == 0); |
| 47 | while (test1 == 0) |
| 48 | cv.wait(lock&: lk); |
| 49 | assert(test1 != 0); |
| 50 | test2 = 1; |
| 51 | lk.unlock(); |
| 52 | cv.notify_one(); |
| 53 | t.join(); |
| 54 | |
| 55 | return 0; |
| 56 | } |
| 57 |