text: //===----------------------------------------------------------------------===//
  //
  // 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: c++98, c++03
  // REQUIRES: verify-support
  // REQUIRES: with_system_cxx_lib=macosx
  // REQUIRES: availability=macosx10.9 || availability=macosx10.10 || availability=macosx10.11 || availability=macosx10.12 || availability=macosx10.13 || availability=macosx10.14 || availability=macosx10.15
  
  // Test the availability markup on std::counting_semaphore and std::binary_semaphore.
  
  #include <chrono>
  #include <semaphore>
  
  
  int main(int, char**)
  {
      {
          // Tests for std::counting_semaphore with non-default template argument
          std::counting_semaphore<20> sem(10);
          sem.release(); // expected-error {{is unavailable}}
          sem.release(5); // expected-error {{is unavailable}}
          sem.acquire(); // expected-error {{is unavailable}}
          sem.try_acquire_for(std::chrono::milliseconds{3}); // expected-error 1-2 {{is unavailable}}
          sem.try_acquire(); // expected-error {{is unavailable}}
          sem.try_acquire_until(std::chrono::steady_clock::now()); // expected-error 1-2 {{is unavailable}}
      }
      {
          // Tests for std::counting_semaphore with default template argument
          std::counting_semaphore<> sem(10);
          sem.release(); // expected-error {{is unavailable}}
          sem.release(5); // expected-error {{is unavailable}}
          sem.acquire(); // expected-error {{is unavailable}}
          sem.try_acquire_for(std::chrono::milliseconds{3}); // expected-error 1-2 {{is unavailable}}
          sem.try_acquire(); // expected-error {{is unavailable}}
          sem.try_acquire_until(std::chrono::steady_clock::now()); // expected-error 1-2 {{is unavailable}}
      }
      {
          // Tests for std::binary_semaphore
          std::binary_semaphore sem(10);
          sem.release(); // expected-error {{is unavailable}}
          sem.release(5); // expected-error {{is unavailable}}
          sem.acquire(); // expected-error {{is unavailable}}
          sem.try_acquire_for(std::chrono::milliseconds{3}); // expected-error 1-2 {{is unavailable}}
          sem.try_acquire(); // expected-error {{is unavailable}}
          sem.try_acquire_until(std::chrono::steady_clock::now()); // expected-error 1-2 {{is unavailable}}
      }
  }
  