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/*
* Copyright (c) 2021, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <Kernel/Locking/Spinlock.h>
namespace Kernel {
template<typename T>
class SpinlockProtected {
AK_MAKE_NONCOPYABLE(SpinlockProtected);
AK_MAKE_NONMOVABLE(SpinlockProtected);
private:
template<typename U>
class Locked {
AK_MAKE_NONCOPYABLE(Locked);
AK_MAKE_NONMOVABLE(Locked);
public:
Locked(U& value, RecursiveSpinlock& spinlock)
: m_value(value)
, m_locker(spinlock)
{
}
ALWAYS_INLINE U const* operator->() const { return &m_value; }
ALWAYS_INLINE U const& operator*() const { return m_value; }
ALWAYS_INLINE U* operator->() { return &m_value; }
ALWAYS_INLINE U& operator*() { return m_value; }
ALWAYS_INLINE U const& get() const { return m_value; }
ALWAYS_INLINE U& get() { return m_value; }
private:
U& m_value;
SpinlockLocker<RecursiveSpinlock> m_locker;
};
auto lock_const() const { return Locked<T const>(m_value, m_spinlock); }
auto lock_mutable() { return Locked<T>(m_value, m_spinlock); }
public:
template<typename... Args>
SpinlockProtected(Args&&... args)
: m_value(forward<Args>(args)...)
{
}
template<typename Callback>
decltype(auto) with(Callback callback) const
{
auto lock = lock_const();
return callback(*lock);
}
template<typename Callback>
decltype(auto) with(Callback callback)
{
auto lock = lock_mutable();
return callback(*lock);
}
template<typename Callback>
void for_each_const(Callback callback) const
{
with([&](auto const& value) {
for (auto& item : value)
callback(item);
});
}
template<typename Callback>
void for_each(Callback callback)
{
with([&](auto& value) {
for (auto& item : value)
callback(item);
});
}
private:
T m_value;
RecursiveSpinlock mutable m_spinlock;
};
}
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