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https://github.com/Atmosphere-NX/Atmosphere-libs.git
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64 lines
2.4 KiB
C++
64 lines
2.4 KiB
C++
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <stratosphere.hpp>
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#include "os_address_space_allocator_forbidden_region.hpp"
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namespace ams::os::impl {
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enum AddressAllocationResult {
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AddressAllocationResult_Success,
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AddressAllocationResult_OutOfMemory,
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AddressAllocationResult_OutOfSpace,
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};
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template<std::unsigned_integral AddressType_, std::unsigned_integral SizeType_>
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class AddressSpaceAllocatorBase {
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NON_COPYABLE(AddressSpaceAllocatorBase);
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NON_MOVEABLE(AddressSpaceAllocatorBase);
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public:
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using AddressType = AddressType_;
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using SizeType = SizeType_;
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private:
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static constexpr size_t MaxForbiddenRegions = 2;
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private:
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InternalCriticalSection m_critical_section;
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AddressType m_start_page;
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AddressType m_end_page;
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SizeType m_guard_page_count;
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AddressType m_forbidden_region_start_pages[MaxForbiddenRegions];
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AddressType m_forbidden_region_end_pages[MaxForbiddenRegions];
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size_t m_forbidden_region_count;
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public:
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AddressSpaceAllocatorBase(u64 start_address, u64 end_address, SizeType guard_size, const AddressSpaceAllocatorForbiddenRegion *forbidden_regions, size_t num_forbidden_regions);
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AddressType AllocateSpace(SizeType size, SizeType align, SizeType align_offset);
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bool CheckGuardSpace(AddressType address, SizeType size, SizeType guard_size);
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private:
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bool GetNextNonOverlappedNodeUnsafe(AddressType page, SizeType page_count);
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public:
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virtual bool CheckFreeSpace(AddressType address, SizeType size) = 0;
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};
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}
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#if defined(ATMOSPHERE_OS_HORIZON)
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#include "os_address_space_allocator_impl.os.horizon.hpp"
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#else
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#include "os_address_space_allocator_impl.generic.hpp"
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#endif
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