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156ab87500
See: * https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc/77319 * https://discourse.llvm.org/t/rfc-project-hand-in-hand-llvm-libc-libc-code-sharing/77701 We're dropping support for C++03 for Zig due to the first change; it would be insane to ship 1018 duplicate header files just for this outdated use case. As a result of the second change, I had to bring in a subset of the headers from llvm-libc since libc++ now depends on these. Hopefully we can continue to get away with not copying the entirety of llvm-libc.
48 lines
1.5 KiB
C++
Vendored
48 lines
1.5 KiB
C++
Vendored
//===----------------------------------------------------------------------===//
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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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#ifndef _LIBCPP___MUTEX_LOCK_GUARD_H
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#define _LIBCPP___MUTEX_LOCK_GUARD_H
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#include <__config>
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#include <__mutex/tag_types.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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template <class _Mutex>
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class _LIBCPP_TEMPLATE_VIS _LIBCPP_THREAD_SAFETY_ANNOTATION(scoped_lockable) lock_guard {
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public:
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typedef _Mutex mutex_type;
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private:
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mutex_type& __m_;
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public:
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[[__nodiscard__]]
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_LIBCPP_HIDE_FROM_ABI explicit lock_guard(mutex_type& __m) _LIBCPP_THREAD_SAFETY_ANNOTATION(acquire_capability(__m))
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: __m_(__m) {
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__m_.lock();
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}
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[[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI lock_guard(mutex_type& __m, adopt_lock_t)
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_LIBCPP_THREAD_SAFETY_ANNOTATION(requires_capability(__m))
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: __m_(__m) {}
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_LIBCPP_HIDE_FROM_ABI ~lock_guard() _LIBCPP_THREAD_SAFETY_ANNOTATION(release_capability()) { __m_.unlock(); }
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lock_guard(lock_guard const&) = delete;
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lock_guard& operator=(lock_guard const&) = delete;
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};
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_LIBCPP_CTAD_SUPPORTED_FOR_TYPE(lock_guard);
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___MUTEX_LOCK_GUARD_H
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