| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // UNSUPPORTED: no-threads |
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| 10 | // UNSUPPORTED: c++03, c++11, c++14, c++17 |
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| 11 | |
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| 12 | // <semaphore> |
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| 13 | |
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| 14 | // constexpr explicit counting_semaphore(ptrdiff_t desired); |
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| 15 | |
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| 16 | #include <semaphore> |
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| 17 | #include <type_traits> |
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| 18 | |
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| 19 | #include "test_macros.h" |
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| 20 | |
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| 21 | static_assert(!std::is_default_constructible<std::binary_semaphore>::value, "" ); |
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| 22 | static_assert(!std::is_default_constructible<std::counting_semaphore<>>::value, "" ); |
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| 23 | |
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| 24 | static_assert(!std::is_convertible<int, std::binary_semaphore>::value, "" ); |
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| 25 | static_assert(!std::is_convertible<int, std::counting_semaphore<>>::value, "" ); |
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| 26 | |
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| 27 | #if TEST_STD_VER > 17 |
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| 28 | // Test constexpr-constructibility. (But not destructibility.) |
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| 29 | constinit std::binary_semaphore bs(1); |
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| 30 | constinit std::counting_semaphore<> cs(1); |
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| 31 | #endif |
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| 32 | |
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