| 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 | |
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| 11 | // <mutex> |
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| 12 | |
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| 13 | // class mutex; |
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| 14 | |
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| 15 | // mutex() noexcept; |
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| 16 | |
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| 17 | #include <mutex> |
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| 18 | #include <cassert> |
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| 19 | #include <type_traits> |
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| 20 | |
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| 21 | static_assert(std::is_nothrow_default_constructible<std::mutex>::value, "" ); |
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| 22 | |
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| 23 | int main(int, char**) { |
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| 24 | // The mutex is unlocked after default construction |
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| 25 | { |
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| 26 | std::mutex m; |
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| 27 | assert(m.try_lock()); |
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| 28 | m.unlock(); |
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| 29 | } |
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| 30 | |
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| 31 | return 0; |
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| 32 | } |
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| 33 | |
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