| //===----------------------------------------------------------------------===// |
| // |
| // 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: no-threads |
| // UNSUPPORTED: c++03, c++11 |
| |
| // Until we drop support for the synchronization library in C++11/14/17 |
| // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS |
| |
| // <semaphore> |
| |
| // constexpr explicit counting_semaphore(ptrdiff_t desired); |
| |
| #include <semaphore> |
| #include <type_traits> |
| |
| #include "test_macros.h" |
| |
| static_assert(!std::is_default_constructible<std::binary_semaphore>::value, ""); |
| static_assert(!std::is_default_constructible<std::counting_semaphore<>>::value, ""); |
| |
| static_assert(!std::is_convertible<int, std::binary_semaphore>::value, ""); |
| static_assert(!std::is_convertible<int, std::counting_semaphore<>>::value, ""); |
| |
| #if TEST_STD_VER > 17 |
| // Test constexpr-constructibility. (But not destructibility.) |
| constinit std::binary_semaphore bs(1); |
| constinit std::counting_semaphore<> cs(1); |
| #endif |
