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 // UNSUPPORTED: c++03, c++11
11 
12 // This test requires the dylib support introduced in D68480, which shipped in
13 // macOS 11.0.
14 // XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14|15}}
15 
16 // <latch>
17 
18 #include <latch>
19 #include <cassert>
20 
21 #include "test_macros.h"
22 
23 int main(int, char**)
24 {
25   std::latch l(1);
26 
27   l.count_down();
28   bool const b = l.try_wait();
29   assert(b);
30 
31   return 0;
32 }
33