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https://github.com/RGBCube/serenity
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79fa9765ca
We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace! This was a slightly tedious refactoring that took a long time, so it's not unlikely that some bugs crept in. Nevertheless, it does pass basic functionality testing, and it's just real nice to finally see the same pattern in all contexts. :^)
69 lines
1.8 KiB
C++
69 lines
1.8 KiB
C++
/*
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* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, Leon Albrecht <leon2002.la@gmail.com>
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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/Error.h>
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#include <Kernel/VirtualAddress.h>
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namespace Kernel::Memory {
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class VirtualRange {
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friend class VirtualRangeAllocator;
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public:
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VirtualRange() = delete;
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VirtualRange(VirtualAddress base, size_t size)
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: m_base(base)
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, m_size(size)
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{
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}
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VirtualAddress base() const { return m_base; }
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size_t size() const { return m_size; }
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bool is_valid() const { return !m_base.is_null(); }
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bool contains(VirtualAddress vaddr) const { return vaddr >= base() && vaddr < end(); }
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VirtualAddress end() const { return m_base.offset(m_size); }
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bool operator==(VirtualRange const& other) const
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{
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return m_base == other.m_base && m_size == other.m_size;
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}
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bool contains(VirtualAddress base, size_t size) const
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{
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if (base.offset(size) < base)
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return false;
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return base >= m_base && base.offset(size) <= end();
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}
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bool contains(VirtualRange const& other) const
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{
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return contains(other.base(), other.size());
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}
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Vector<VirtualRange, 2> carve(VirtualRange const&) const;
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VirtualRange intersect(VirtualRange const&) const;
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static ErrorOr<VirtualRange> expand_to_page_boundaries(FlatPtr address, size_t size);
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private:
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VirtualAddress m_base;
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size_t m_size { 0 };
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};
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}
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template<>
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struct AK::Formatter<Kernel::Memory::VirtualRange> : Formatter<FormatString> {
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void format(FormatBuilder& builder, Kernel::Memory::VirtualRange value)
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{
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return Formatter<FormatString>::format(builder, "{} - {} (size {:p})", value.base().as_ptr(), value.base().offset(value.size() - 1).as_ptr(), value.size());
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}
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};
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