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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Traits.h>
#include <AK/Vector.h>
#include <Kernel/SpinLock.h>
#include <Kernel/VM/Range.h>
namespace Kernel {
class RangeAllocator {
public:
RangeAllocator();
~RangeAllocator();
void initialize_with_range(VirtualAddress, size_t);
void initialize_from_parent(const RangeAllocator&);
Optional<Range> allocate_anywhere(size_t, size_t alignment = PAGE_SIZE);
Optional<Range> allocate_specific(VirtualAddress, size_t);
Optional<Range> allocate_randomized(size_t, size_t alignment);
void deallocate(const Range&);
void dump() const;
bool contains(const Range& range) const
{
ScopedSpinLock lock(m_lock);
return m_total_range.contains(range);
}
private:
void carve_at_index(int, const Range&);
Vector<Range> m_available_ranges;
Range m_total_range;
mutable SpinLock<u8> m_lock;
};
}
namespace AK {
template<>
struct Traits<Kernel::Range> : public GenericTraits<Kernel::Range> {
static constexpr bool is_trivial() { return true; }
};
}
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