mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-11 13:36:13 +03:00
92 lines
2.5 KiB
C++
92 lines
2.5 KiB
C++
/*
|
|
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/FixedArray.h>
|
|
#include <AK/IntrusiveList.h>
|
|
#include <AK/RefPtr.h>
|
|
#include <Kernel/Forward.h>
|
|
#include <Kernel/Library/ListedRefCounted.h>
|
|
#include <Kernel/Library/LockWeakable.h>
|
|
#include <Kernel/Locking/Mutex.h>
|
|
#include <Kernel/Memory/Region.h>
|
|
|
|
namespace Kernel::Memory {
|
|
|
|
class VMObject
|
|
: public ListedRefCounted<VMObject, LockType::Spinlock>
|
|
, public LockWeakable<VMObject> {
|
|
friend class MemoryManager;
|
|
friend class Region;
|
|
|
|
public:
|
|
virtual ~VMObject();
|
|
|
|
virtual ErrorOr<NonnullLockRefPtr<VMObject>> try_clone() = 0;
|
|
|
|
virtual bool is_anonymous() const { return false; }
|
|
virtual bool is_inode() const { return false; }
|
|
virtual bool is_shared_inode() const { return false; }
|
|
virtual bool is_private_inode() const { return false; }
|
|
|
|
size_t page_count() const { return m_physical_pages.size(); }
|
|
|
|
virtual ReadonlySpan<RefPtr<PhysicalPage>> physical_pages() const { return m_physical_pages.span(); }
|
|
virtual Span<RefPtr<PhysicalPage>> physical_pages() { return m_physical_pages.span(); }
|
|
|
|
size_t size() const { return m_physical_pages.size() * PAGE_SIZE; }
|
|
|
|
virtual StringView class_name() const = 0;
|
|
|
|
ALWAYS_INLINE void add_region(Region& region)
|
|
{
|
|
SpinlockLocker locker(m_lock);
|
|
m_regions.append(region);
|
|
}
|
|
|
|
ALWAYS_INLINE void remove_region(Region& region)
|
|
{
|
|
SpinlockLocker locker(m_lock);
|
|
m_regions.remove(region);
|
|
}
|
|
|
|
protected:
|
|
static ErrorOr<FixedArray<RefPtr<PhysicalPage>>> try_create_physical_pages(size_t);
|
|
ErrorOr<FixedArray<RefPtr<PhysicalPage>>> try_clone_physical_pages() const;
|
|
explicit VMObject(FixedArray<RefPtr<PhysicalPage>>&&);
|
|
|
|
template<typename Callback>
|
|
void for_each_region(Callback);
|
|
|
|
IntrusiveListNode<VMObject> m_list_node;
|
|
FixedArray<RefPtr<PhysicalPage>> m_physical_pages;
|
|
|
|
mutable RecursiveSpinlock<LockRank::None> m_lock {};
|
|
|
|
private:
|
|
VMObject& operator=(VMObject const&) = delete;
|
|
VMObject& operator=(VMObject&&) = delete;
|
|
VMObject(VMObject&&) = delete;
|
|
|
|
Region::ListInVMObject m_regions;
|
|
|
|
public:
|
|
using AllInstancesList = IntrusiveList<&VMObject::m_list_node>;
|
|
static SpinlockProtected<VMObject::AllInstancesList, LockRank::None>& all_instances();
|
|
};
|
|
|
|
template<typename Callback>
|
|
inline void VMObject::for_each_region(Callback callback)
|
|
{
|
|
SpinlockLocker lock(m_lock);
|
|
for (auto& region : m_regions) {
|
|
callback(region);
|
|
}
|
|
}
|
|
|
|
}
|