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// UNSUPPORTED: c++03, c++11, c++14, c++17
11
12// XFAIL: availability-synchronization_library-missing
13
14// <semaphore>
15
16#include <semaphore>
17#include <chrono>
18#include <thread>
19#include <type_traits>
20
21#include "make_test_thread.h"
22#include "test_macros.h"
23
24static_assert(std::is_same<std::binary_semaphore, std::counting_semaphore<1>>::value, "");
25
26int main(int, char**)
27{
28 std::binary_semaphore s(1);
29
30 auto l = [&](){
31 for(int i = 0; i < 1024; ++i) {
32 s.acquire();
33 std::this_thread::sleep_for(rtime: std::chrono::microseconds(1));
34 s.release();
35 }
36 };
37
38 std::thread t = support::make_test_thread(l);
39 l();
40
41 t.join();
42
43 return 0;
44}
45

source code of libcxx/test/std/thread/thread.semaphore/binary.pass.cpp