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 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
25std::condition_variable cv;
26std::mutex mut;
27
28int test0 = 0;
29int test1 = 0;
30int test2 = 0;
31
32void f1()
33{
34 std::unique_lock<std::mutex> lk(mut);
35 assert(test1 == 0);
36 while (test1 == 0)
37 cv.wait(lock&: lk);
38 assert(test1 == 1);
39 test1 = 2;
40}
41
42void f2()
43{
44 std::unique_lock<std::mutex> lk(mut);
45 assert(test2 == 0);
46 while (test2 == 0)
47 cv.wait(lock&: lk);
48 assert(test2 == 1);
49 test2 = 2;
50}
51
52int 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(rtime: 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(rtime: 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

source code of libcxx/test/std/thread/thread.condition/thread.condition.condvar/notify_all.pass.cpp