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Kernel: Make NNRP<PhysicalPage const> possible

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This wasn't possible before as ref() and unref() were non-const.
This commit is contained in:
Andreas Kling 2023-02-19 23:01:04 +01:00
parent e08c55dd8d
commit 8bf248a046
2 changed files with 5 additions and 5 deletions
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2
Kernel/Memory/PhysicalPage.cpp
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@ -26,7 +26,7 @@ PhysicalAddress PhysicalPage::paddr() const
return MM.get_physical_address(*this); return MM.get_physical_address(*this);
} }
void PhysicalPage::free_this() void PhysicalPage::free_this() const
{ {
auto paddr = MM.get_physical_address(*this); auto paddr = MM.get_physical_address(*this);
if (m_may_return_to_freelist == MayReturnToFreeList::Yes) { if (m_may_return_to_freelist == MayReturnToFreeList::Yes) {

8
Kernel/Memory/PhysicalPage.h
View file

@ -25,12 +25,12 @@ class PhysicalPage {
public: public:
PhysicalAddress paddr() const; PhysicalAddress paddr() const;
void ref() void ref() const
{ {
m_ref_count.fetch_add(1, AK::memory_order_relaxed); m_ref_count.fetch_add(1, AK::memory_order_relaxed);
} }
void unref() void unref() const
{ {
if (m_ref_count.fetch_sub(1, AK::memory_order_acq_rel) == 1) if (m_ref_count.fetch_sub(1, AK::memory_order_acq_rel) == 1)
free_this(); free_this();
@ -47,9 +47,9 @@ private:
explicit PhysicalPage(MayReturnToFreeList may_return_to_freelist); explicit PhysicalPage(MayReturnToFreeList may_return_to_freelist);
~PhysicalPage() = default; ~PhysicalPage() = default;
void free_this(); void free_this() const;
Atomic<u32> m_ref_count { 1 }; mutable Atomic<u32> m_ref_count { 1 };
MayReturnToFreeList m_may_return_to_freelist { MayReturnToFreeList::Yes }; MayReturnToFreeList m_may_return_to_freelist { MayReturnToFreeList::Yes };
}; };