ladybird/Kernel/VirtualAddress.h

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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Format.h>
#include <AK/Types.h>
class VirtualAddress {
public:
VirtualAddress() = default;
explicit VirtualAddress(FlatPtr address)
: m_address(address)
{
}
explicit VirtualAddress(const void* address)
: m_address((FlatPtr)address)
{
}
[[nodiscard]] bool is_null() const { return m_address == 0; }
[[nodiscard]] bool is_page_aligned() const { return (m_address & 0xfff) == 0; }
[[nodiscard]] VirtualAddress offset(FlatPtr o) const { return VirtualAddress(m_address + o); }
[[nodiscard]] FlatPtr get() const { return m_address; }
void set(FlatPtr address) { m_address = address; }
void mask(FlatPtr m) { m_address &= m; }
bool operator<=(const VirtualAddress& other) const { return m_address <= other.m_address; }
bool operator>=(const VirtualAddress& other) const { return m_address >= other.m_address; }
bool operator>(const VirtualAddress& other) const { return m_address > other.m_address; }
bool operator<(const VirtualAddress& other) const { return m_address < other.m_address; }
bool operator==(const VirtualAddress& other) const { return m_address == other.m_address; }
bool operator!=(const VirtualAddress& other) const { return m_address != other.m_address; }
[[nodiscard]] u8* as_ptr() { return reinterpret_cast<u8*>(m_address); }
[[nodiscard]] const u8* as_ptr() const { return reinterpret_cast<const u8*>(m_address); }
[[nodiscard]] VirtualAddress page_base() const { return VirtualAddress(m_address & 0xfffff000); }
private:
FlatPtr m_address { 0 };
};
inline VirtualAddress operator-(const VirtualAddress& a, const VirtualAddress& b)
{
return VirtualAddress(a.get() - b.get());
}
template<>
struct AK::Formatter<VirtualAddress> : AK::Formatter<FormatString> {
void format(FormatBuilder& builder, const VirtualAddress& value)
{
return AK::Formatter<FormatString>::format(builder, "V{}", value.as_ptr());
}
};