| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___MUTEX_LOCK_GUARD_H |
| #define _LIBCPP___MUTEX_LOCK_GUARD_H |
| |
| #include <__config> |
| #include <__mutex/tag_types.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| #ifndef _LIBCPP_HAS_NO_THREADS |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class _Mutex> |
| class _LIBCPP_TEMPLATE_VIS _LIBCPP_THREAD_SAFETY_ANNOTATION(scoped_lockable) lock_guard { |
| public: |
| typedef _Mutex mutex_type; |
| |
| private: |
| mutex_type& __m_; |
| |
| public: |
| _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI explicit lock_guard(mutex_type& __m) |
| _LIBCPP_THREAD_SAFETY_ANNOTATION(acquire_capability(__m)) |
| : __m_(__m) { |
| __m_.lock(); |
| } |
| |
| _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI lock_guard(mutex_type& __m, adopt_lock_t) |
| _LIBCPP_THREAD_SAFETY_ANNOTATION(requires_capability(__m)) |
| : __m_(__m) {} |
| _LIBCPP_HIDE_FROM_ABI ~lock_guard() _LIBCPP_THREAD_SAFETY_ANNOTATION(release_capability()) { __m_.unlock(); } |
| |
| private: |
| lock_guard(lock_guard const&) = delete; |
| lock_guard& operator=(lock_guard const&) = delete; |
| }; |
| _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(lock_guard); |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP_HAS_NO_THREADS |
| |
| #endif // _LIBCPP___MUTEX_LOCK_GUARD_H |