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1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef _LIBCPP___MUTEX_LOCK_GUARD_H10#define _LIBCPP___MUTEX_LOCK_GUARD_H11 12#include <__config>13#include <__mutex/tag_types.h>14 15#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)16# pragma GCC system_header17#endif18 19_LIBCPP_BEGIN_NAMESPACE_STD20 21template <class _Mutex>22class _LIBCPP_SCOPED_LOCKABLE lock_guard {23public:24 typedef _Mutex mutex_type;25 26private:27 mutex_type& __m_;28 29public:30 [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI explicit lock_guard(mutex_type& __m) _LIBCPP_ACQUIRE_CAPABILITY(__m)31 : __m_(__m) {32 __m_.lock();33 }34 35 [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI lock_guard(mutex_type& __m, adopt_lock_t) _LIBCPP_REQUIRES_CAPABILITY(__m)36 : __m_(__m) {}37 _LIBCPP_RELEASE_CAPABILITY _LIBCPP_HIDE_FROM_ABI ~lock_guard() { __m_.unlock(); }38 39 lock_guard(lock_guard const&) = delete;40 lock_guard& operator=(lock_guard const&) = delete;41};42_LIBCPP_CTAD_SUPPORTED_FOR_TYPE(lock_guard);43 44_LIBCPP_END_NAMESPACE_STD45 46#endif // _LIBCPP___MUTEX_LOCK_GUARD_H47