File: arrive_and_drop.pass.cpp

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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: libcpp-has-no-threads
// UNSUPPORTED: c++03, c++11

// This test requires the dylib support introduced in D68480, which shipped in macOS 11.0.
// XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14|15}}

// <barrier>

#include <barrier>
#include <thread>
#include <cassert>

#include "make_test_thread.h"
#include "test_macros.h"

int main(int, char**)
{
  std::barrier<> b(2);

  std::thread t = support::make_test_thread([&](){
    b.arrive_and_drop();
  });

  b.arrive_and_wait();
  b.arrive_and_wait();
  t.join();
  return 0;
}