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: libcpp-has-no-threads
10 
11 // <condition_variable>
12 
13 // class condition_variable;
14 
15 // void notify_all();
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 test0 = 0;
29 int test1 = 0;
30 int test2 = 0;
31 
f1()32 void f1()
33 {
34     std::unique_lock<std::mutex> lk(mut);
35     assert(test1 == 0);
36     while (test1 == 0)
37         cv.wait(lk);
38     assert(test1 == 1);
39     test1 = 2;
40 }
41 
f2()42 void f2()
43 {
44     std::unique_lock<std::mutex> lk(mut);
45     assert(test2 == 0);
46     while (test2 == 0)
47         cv.wait(lk);
48     assert(test2 == 1);
49     test2 = 2;
50 }
51 
main(int,char **)52 int main(int, char**)
53 {
54     std::thread t1 = support::make_test_thread(f1);
55     std::thread t2 = support::make_test_thread(f2);
56     std::this_thread::sleep_for(std::chrono::milliseconds(100));
57     {
58         std::unique_lock<std::mutex>lk(mut);
59         test1 = 1;
60         test2 = 1;
61     }
62     cv.notify_all();
63     {
64         std::this_thread::sleep_for(std::chrono::milliseconds(100));
65         std::unique_lock<std::mutex>lk(mut);
66     }
67     t1.join();
68     t2.join();
69     assert(test1 == 2);
70     assert(test2 == 2);
71 
72   return 0;
73 }
74