106c3fb27SDimitry Andric //===----------------------------------------------------------------------===// 206c3fb27SDimitry Andric // 306c3fb27SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 406c3fb27SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 506c3fb27SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 606c3fb27SDimitry Andric // 706c3fb27SDimitry Andric //===----------------------------------------------------------------------===// 806c3fb27SDimitry Andric 906c3fb27SDimitry Andric #ifndef _LIBCPP___MUTEX_LOCK_GUARD_H 1006c3fb27SDimitry Andric #define _LIBCPP___MUTEX_LOCK_GUARD_H 1106c3fb27SDimitry Andric 1206c3fb27SDimitry Andric #include <__config> 1306c3fb27SDimitry Andric #include <__mutex/tag_types.h> 1406c3fb27SDimitry Andric 1506c3fb27SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 1606c3fb27SDimitry Andric # pragma GCC system_header 1706c3fb27SDimitry Andric #endif 1806c3fb27SDimitry Andric 1906c3fb27SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 2006c3fb27SDimitry Andric 2106c3fb27SDimitry Andric template <class _Mutex> 2206c3fb27SDimitry Andric class _LIBCPP_TEMPLATE_VIS _LIBCPP_THREAD_SAFETY_ANNOTATION(scoped_lockable) lock_guard { 2306c3fb27SDimitry Andric public: 2406c3fb27SDimitry Andric typedef _Mutex mutex_type; 2506c3fb27SDimitry Andric 2606c3fb27SDimitry Andric private: 2706c3fb27SDimitry Andric mutex_type& __m_; 2806c3fb27SDimitry Andric 2906c3fb27SDimitry Andric public: 30*0fca6ea1SDimitry Andric _LIBCPP_NODISCARD 31*0fca6ea1SDimitry Andric _LIBCPP_HIDE_FROM_ABI explicit lock_guard(mutex_type& __m) _LIBCPP_THREAD_SAFETY_ANNOTATION(acquire_capability(__m)) 3206c3fb27SDimitry Andric : __m_(__m) { 3306c3fb27SDimitry Andric __m_.lock(); 3406c3fb27SDimitry Andric } 3506c3fb27SDimitry Andric 36*0fca6ea1SDimitry Andric _LIBCPP_NODISCARD _LIBCPP_HIDE_FROM_ABI lock_guard(mutex_type& __m, adopt_lock_t) 3706c3fb27SDimitry Andric _LIBCPP_THREAD_SAFETY_ANNOTATION(requires_capability(__m)) 3806c3fb27SDimitry Andric : __m_(__m) {} 3906c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI ~lock_guard() _LIBCPP_THREAD_SAFETY_ANNOTATION(release_capability()) { __m_.unlock(); } 4006c3fb27SDimitry Andric 4106c3fb27SDimitry Andric lock_guard(lock_guard const&) = delete; 4206c3fb27SDimitry Andric lock_guard& operator=(lock_guard const&) = delete; 4306c3fb27SDimitry Andric }; 4406c3fb27SDimitry Andric _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(lock_guard); 4506c3fb27SDimitry Andric 4606c3fb27SDimitry Andric _LIBCPP_END_NAMESPACE_STD 4706c3fb27SDimitry Andric 4806c3fb27SDimitry Andric #endif // _LIBCPP___MUTEX_LOCK_GUARD_H 49