Atmosphere/libraries/libmesosphere/include/mesosphere/kern_k_scoped_lock.hpp

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/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <mesosphere/kern_common.hpp>
namespace ams::kern {
/*
TODO: C++20
template<typename T>
concept KLockable = !std::is_reference<T>::value && requires (T &t) {
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{ t.Lock() } -> std::same_as<void>;
{ t.Unlock() } -> std::same_as<void>;
};
*/
template<typename T> /* TODO C++20: requires KLockable<T> */
class KScopedLock {
NON_COPYABLE(KScopedLock);
NON_MOVEABLE(KScopedLock);
private:
T *lock_ptr;
public:
explicit ALWAYS_INLINE KScopedLock(T *l) : lock_ptr(l) { this->lock_ptr->Lock(); }
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explicit ALWAYS_INLINE KScopedLock(T &l) : KScopedLock(std::addressof(l)) { /* ... */ }
ALWAYS_INLINE ~KScopedLock() { this->lock_ptr->Unlock(); }
};
}