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09d0fae2c6
Previously, we could only release *all* clean pages. This patch makes it possible to release a specific amount of clean pages. If the attempted number of pages to release is more than the amount of clean pages, all clean pages will be released.
45 lines
1.1 KiB
C++
45 lines
1.1 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Bitmap.h>
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#include <Kernel/Memory/VMObject.h>
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#include <Kernel/UnixTypes.h>
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namespace Kernel::Memory {
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class InodeVMObject : public VMObject {
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public:
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virtual ~InodeVMObject() override;
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Inode& inode() { return *m_inode; }
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Inode const& inode() const { return *m_inode; }
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size_t amount_dirty() const;
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size_t amount_clean() const;
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int release_all_clean_pages();
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int try_release_clean_pages(int page_amount);
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u32 writable_mappings() const;
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u32 executable_mappings() const;
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protected:
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explicit InodeVMObject(Inode&, FixedArray<RefPtr<PhysicalPage>>&&, Bitmap dirty_pages);
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explicit InodeVMObject(InodeVMObject const&, FixedArray<RefPtr<PhysicalPage>>&&, Bitmap dirty_pages);
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InodeVMObject& operator=(InodeVMObject const&) = delete;
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InodeVMObject& operator=(InodeVMObject&&) = delete;
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InodeVMObject(InodeVMObject&&) = delete;
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virtual bool is_inode() const final { return true; }
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NonnullRefPtr<Inode> m_inode;
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Bitmap m_dirty_pages;
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};
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}
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