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Kernel: Introduce spin-locked contended and locked resource concepts

This commit is contained in:
Jean-Baptiste Boric 2021-07-24 16:42:39 +02:00 committed by Andreas Kling
parent 3d684316c2
commit 019ad8a507
2 changed files with 117 additions and 0 deletions

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/*
* Copyright (c) 2021, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/StdLibExtras.h>
#include <Kernel/Locking/SpinLock.h>
namespace Kernel {
template<typename T>
class SpinLockLockedResource {
AK_MAKE_NONCOPYABLE(SpinLockLockedResource);
public:
SpinLockLockedResource(T* value, RecursiveSpinLock& spinlock)
: m_value(value)
, m_scoped_spinlock(spinlock)
{
}
ALWAYS_INLINE T const* operator->() const { return m_value; }
ALWAYS_INLINE T const& operator*() const { return *m_value; }
ALWAYS_INLINE T* operator->() { return m_value; }
ALWAYS_INLINE T& operator*() { return *m_value; }
ALWAYS_INLINE T const* get() const { return m_value; }
ALWAYS_INLINE T* get() { return m_value; }
private:
T* m_value;
ScopedSpinLock<RecursiveSpinLock> m_scoped_spinlock;
};
class SpinLockContendedResource {
template<typename>
friend class SpinLockLockedResource;
AK_MAKE_NONCOPYABLE(SpinLockContendedResource);
AK_MAKE_NONMOVABLE(SpinLockContendedResource);
public:
SpinLockContendedResource() = default;
protected:
mutable RecursiveSpinLock m_spinlock;
};
}