| 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 | // <mutex> |
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| 10 | |
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| 11 | // template <class Mutex> class unique_lock; |
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| 12 | |
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| 13 | // void swap(unique_lock& u); |
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| 14 | |
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| 15 | #include <cassert> |
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| 16 | #include <memory> |
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| 17 | #include <mutex> |
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| 18 | |
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| 19 | #include "checking_mutex.h" |
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| 20 | #include "test_macros.h" |
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| 21 | |
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| 22 | #if TEST_STD_VER >= 11 |
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| 23 | static_assert( |
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| 24 | noexcept(std::declval<std::unique_lock<checking_mutex>&>().swap(std::declval<std::unique_lock<checking_mutex>&>())), |
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| 25 | "" ); |
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| 26 | #endif |
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| 27 | |
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| 28 | int main(int, char**) { |
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| 29 | checking_mutex mux; |
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| 30 | std::unique_lock<checking_mutex> lock1(mux); |
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| 31 | std::unique_lock<checking_mutex> lock2; |
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| 32 | |
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| 33 | lock1.swap(lock2); |
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| 34 | |
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| 35 | assert(lock1.mutex() == nullptr); |
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| 36 | assert(!lock1.owns_lock()); |
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| 37 | assert(lock2.mutex() == std::addressof(mux)); |
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| 38 | assert(lock2.owns_lock() == true); |
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| 39 | |
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| 40 | return 0; |
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| 41 | } |
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| 42 | |
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