mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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
|
|
|
|
_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
|
|
_LIBCPP_HIDE_FROM_ABI explicit lock_guard(mutex_type& __m) _LIBCPP_THREAD_SAFETY_ANNOTATION(acquire_capability(__m))
|
|
: __m_(__m) {
|
|
__m_.lock();
|
|
}
|
|
|
|
_LIBCPP_NODISCARD _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(); }
|
|
|
|
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___MUTEX_LOCK_GUARD_H
|