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97 lines
3.2 KiB
C++
97 lines
3.2 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/FixedArray.h>
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#include <AK/InlineLinkedList.h>
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#include <AK/RefCounted.h>
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#include <AK/RefPtr.h>
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#include <AK/Weakable.h>
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#include <Kernel/Lock.h>
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namespace Kernel {
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class Inode;
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class PhysicalPage;
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class VMObject : public RefCounted<VMObject>
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, public Weakable<VMObject>
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, public InlineLinkedListNode<VMObject> {
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friend class MemoryManager;
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friend class Region;
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public:
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virtual ~VMObject();
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virtual NonnullRefPtr<VMObject> clone() = 0;
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virtual bool is_anonymous() const { return false; }
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virtual bool is_purgeable() const { return false; }
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virtual bool is_inode() const { return false; }
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virtual bool is_shared_inode() const { return false; }
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virtual bool is_private_inode() const { return false; }
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virtual bool is_contiguous() const { return false; }
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size_t page_count() const { return m_physical_pages.size(); }
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const FixedArray<RefPtr<PhysicalPage>>& physical_pages() const { return m_physical_pages; }
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FixedArray<RefPtr<PhysicalPage>>& physical_pages() { return m_physical_pages; }
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size_t size() const { return m_physical_pages.size() * PAGE_SIZE; }
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virtual const char* class_name() const = 0;
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// For InlineLinkedListNode
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VMObject* m_next { nullptr };
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VMObject* m_prev { nullptr };
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protected:
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explicit VMObject(size_t);
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explicit VMObject(const VMObject&);
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template<typename Callback>
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void for_each_region(Callback);
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FixedArray<RefPtr<PhysicalPage>> m_physical_pages;
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Lock m_paging_lock { "VMObject" };
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private:
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VMObject& operator=(const VMObject&) = delete;
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VMObject& operator=(VMObject&&) = delete;
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VMObject(VMObject&&) = delete;
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};
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template<typename T>
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inline bool is(const VMObject&) { return false; }
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template<typename T>
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inline T& to(VMObject& object)
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{
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ASSERT(is<typename RemoveConst<T>::Type>(object));
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return static_cast<T&>(object);
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}
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}
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