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Kernel: Move Spinlock functions back to arch independent Locking folder
Now that the Spinlock code is not dependent on architectural specific code anymore, we can move it back to the Locking folder. This also means that the Spinlock implemenation is now used for the aarch64 kernel.
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6 changed files with 75 additions and 116 deletions
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@ -8,11 +8,73 @@
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#include <AK/Atomic.h>
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#include <AK/Types.h>
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#include <Kernel/Arch/Spinlock.h>
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#include <Kernel/Arch/Processor.h>
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#include <Kernel/Locking/LockRank.h>
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namespace Kernel {
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class Spinlock {
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AK_MAKE_NONCOPYABLE(Spinlock);
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AK_MAKE_NONMOVABLE(Spinlock);
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public:
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Spinlock(LockRank rank)
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: m_rank(rank)
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{
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}
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InterruptsState lock();
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void unlock(InterruptsState);
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[[nodiscard]] ALWAYS_INLINE bool is_locked() const
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{
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return m_lock.load(AK::memory_order_relaxed) != 0;
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}
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ALWAYS_INLINE void initialize()
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{
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m_lock.store(0, AK::memory_order_relaxed);
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}
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private:
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Atomic<u8> m_lock { 0 };
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const LockRank m_rank;
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};
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class RecursiveSpinlock {
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AK_MAKE_NONCOPYABLE(RecursiveSpinlock);
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AK_MAKE_NONMOVABLE(RecursiveSpinlock);
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public:
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RecursiveSpinlock(LockRank rank)
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: m_rank(rank)
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{
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}
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InterruptsState lock();
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void unlock(InterruptsState);
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[[nodiscard]] ALWAYS_INLINE bool is_locked() const
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{
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return m_lock.load(AK::memory_order_relaxed) != 0;
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}
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[[nodiscard]] ALWAYS_INLINE bool is_locked_by_current_processor() const
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{
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return m_lock.load(AK::memory_order_relaxed) == FlatPtr(&Processor::current());
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}
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ALWAYS_INLINE void initialize()
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{
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m_lock.store(0, AK::memory_order_relaxed);
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}
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private:
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Atomic<FlatPtr> m_lock { 0 };
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u32 m_recursions { 0 };
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const LockRank m_rank;
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};
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template<typename LockType>
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class [[nodiscard]] SpinlockLocker {
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AK_MAKE_NONCOPYABLE(SpinlockLocker);
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