mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-30 00:31:14 +00:00
49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/RedBlackTree.h>
|
|
#include <AK/Traits.h>
|
|
#include <Kernel/Locking/SpinLock.h>
|
|
#include <Kernel/Memory/VirtualRange.h>
|
|
|
|
namespace Kernel::Memory {
|
|
|
|
class VirtualRangeAllocator {
|
|
public:
|
|
VirtualRangeAllocator();
|
|
~VirtualRangeAllocator() = default;
|
|
|
|
void initialize_with_range(VirtualAddress, size_t);
|
|
void initialize_from_parent(VirtualRangeAllocator const&);
|
|
|
|
Optional<VirtualRange> allocate_anywhere(size_t, size_t alignment = PAGE_SIZE);
|
|
Optional<VirtualRange> allocate_specific(VirtualAddress, size_t);
|
|
Optional<VirtualRange> allocate_randomized(size_t, size_t alignment);
|
|
void deallocate(VirtualRange const&);
|
|
|
|
void dump() const;
|
|
|
|
bool contains(VirtualRange const& range) const { return m_total_range.contains(range); }
|
|
|
|
private:
|
|
void carve_at_iterator(auto&, VirtualRange const&);
|
|
|
|
RedBlackTree<FlatPtr, VirtualRange> m_available_ranges;
|
|
VirtualRange m_total_range;
|
|
mutable SpinLock<u8> m_lock;
|
|
};
|
|
|
|
}
|
|
|
|
namespace AK {
|
|
template<>
|
|
struct Traits<Kernel::Memory::VirtualRange> : public GenericTraits<Kernel::Memory::VirtualRange> {
|
|
static constexpr bool is_trivial() { return true; }
|
|
};
|
|
}
|