Coverage Report

Created: 2020-11-24 06:42

/Users/buildslave/jenkins/workspace/coverage/llvm-project/libcxx/src/mutex_destructor.cpp
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//===--------------------- mutex_destructor.cpp ---------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// Define ~mutex.
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//
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// On some platforms ~mutex has been made trivial and the definition is only
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// provided for ABI compatibility.
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//
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// In order to avoid ODR violations within libc++ itself, we need to ensure
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// that *nothing* sees the non-trivial mutex declaration. For this reason
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// we re-declare the entire class in this file instead of using
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// _LIBCPP_BUILDING_LIBRARY to change the definition in the headers.
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#include "__config"
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#include "__threading_support"
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#if !defined(_LIBCPP_HAS_NO_THREADS)
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#if _LIBCPP_ABI_VERSION == 1 || !defined(_LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION)
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#define NEEDS_MUTEX_DESTRUCTOR
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#endif
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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#ifdef NEEDS_MUTEX_DESTRUCTOR
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class _LIBCPP_TYPE_VIS mutex
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{
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    __libcpp_mutex_t __m_ = _LIBCPP_MUTEX_INITIALIZER;
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public:
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    _LIBCPP_ALWAYS_INLINE _LIBCPP_INLINE_VISIBILITY
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    constexpr mutex() = default;
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    mutex(const mutex&) = delete;
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    mutex& operator=(const mutex&) = delete;
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    ~mutex() noexcept;
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};
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mutex::~mutex() _NOEXCEPT
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{
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    __libcpp_mutex_destroy(&__m_);
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}
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#endif // !_LIBCPP_HAS_NO_THREADS
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_LIBCPP_END_NAMESPACE_STD