bhkThreadMemorySource.h

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#pragma once
 
#include "RE/H/hkMemoryAllocator.h"
#include "RE/I/IMemoryHeap.h"
 
namespace RE
{
    class HeapBlock;
    class HeapBlockFreeHead;
 
    class bhkThreadMemorySource :
        public hkMemoryAllocator,  // 00
        public IMemoryHeap         // 08
    {
    public:
        inline static constexpr auto RTTI = RTTI_bhkThreadMemorySource;
        inline static constexpr auto VTABLE = VTABLE_bhkThreadMemorySource;
 
        struct FreeBlock
        {
        public:
            // members
            FreeBlock* next;  // 0
        };
        static_assert(sizeof(FreeBlock) == 0x8);
 
        struct BlockPage
        {
        public:
            // members
            BlockPage*    left;       // 00
            BlockPage*    right;      // 08
            FreeBlock*    blocks;     // 10
            std::uint16_t totalElem;  // 18
            std::uint16_t freeElem;   // 1A
            std::uint32_t pad1C;      // 1C
        };
        static_assert(sizeof(BlockPage) == 0x20);
 
        struct Row
        {
        public:
            // members
            BlockPage*   pageList;              // 00
            BlockPage*   currAlloc;             // 08
            std::int32_t totalFreeBlocks;       // 10
            std::int32_t totalAllocatedBlocks;  // 14
            std::int32_t totalBytes;            // 18
            std::int32_t elemSize;              // 1C
        };
        static_assert(sizeof(Row) == 0x20);
 
        struct MegaBlockPage
        {
        public:
            // members
            char           mem[sizeof(BlockPage[255]) * 256];  // 000000
            BlockPage      blockPages[255];                    // 1FE000
            MegaBlockPage* left;                               // 1FFFE0
            MegaBlockPage* right;                              // 1FFFE8
            BlockPage*     freeBlockPages;                     // 1FFFF0
            std::uint16_t  numFreeBlockPages;                  // 1FFFF8
            std::uint16_t  nextBlockPageAlloc;                 // 1FFFFA
            bool           decommitted;                        // 1FFFFC
            std::uint8_t   pad1FFFFD;                          // 1FFFFD
            std::uint16_t  pad1FFFFE;                          // 1FFFFE
        };
        static_assert(sizeof(MegaBlockPage) == 0x200000);
 
        ~bhkThreadMemorySource() override;  // 00
 
        // override (hkMemoryAllocator)
        void*        BlockAlloc(std::int32_t a_numBytes) override;                                                       // 01
        void         BlockFree(void* a_ptr, std::int32_t a_numBytes) override;                                           // 02
        void*        BufAlloc(std::int32_t& a_reqNumBytesInOut) override;                                                // 03
        void         BufFree(void* a_ptr, std::int32_t a_numBytes) override;                                             // 04
        void*        BufRealloc(void* a_ptrOld, std::int32_t a_oldNumBytes, std::int32_t& a_reqNumBytesInOut) override;  // 05
        void         BlockAllocBatch(void** a_ptrsOut, std::int32_t a_numPtrs, std::int32_t a_blockSize) override;       // 06
        void         BlockFreeBatch(void** a_ptrsIn, std::int32_t a_numPtrs, std::int32_t a_blockSize) override;         // 07
        void         GetMemoryStatistics(MemoryStatistics& a_usage) override;                                            // 08
        std::int32_t GetAllocatedSize(const void* a_obj, std::int32_t a_numBytes) override;                              // 09
 
        // override (IMemoryHeap)
        std::size_t                 Size(const void* a_block) const override;                                      // 01
        void                        GetMemoryStats(MemoryStats* a_stats) override;                                 // 02
        const char*                 GetName() const override;                                                      // 07 - { return "bhkThreadMemorySource"; }
        void*                       Allocate(std::size_t a_size, std::uint32_t a_alignment) override;              // 08
        void                        Deallocate(void* a_pointer, std::uint32_t) override;                           // 09
        bool                        PointerInHeap(const void* a_pointer) const override;                           // 0A
        std::size_t                 TotalSize(const void* a_pointer) const override;                               // 0B
        void                        GetHeapStats(HeapStats* a_stats, bool a_fullBlockInfo) override;               // 0C
        bool                        ShouldTrySmallBlockPools(std::size_t a_size, MEM_CONTEXT a_context) override;  // 0D
        [[nodiscard]] std::uint32_t GetPageSize() const override;                                                  // 0E
 
        // members
        BSCriticalSection  lock;                    // 10
        Row*               rows;                    // 38
        std::uint16_t*     smallRowIndexes;         // 40
        std::uint16_t*     largeRowIndexes;         // 48
        HeapBlock**        lists;                   // 50
        HeapBlockFreeHead* largeFreeTrees;          // 58
        HeapBlock*         firstBlock;              // 60
        HeapBlock*         lastBlock;               // 68
        void*              memoryRoot;              // 70
        char*              allocBase;               // 78
        char*              blockStart;              // 80
        char*              allocEnd;                // 88
        char*              commitEnd;               // 90
        char*              blockPageCommit;         // 98
        char*              addressSpaceEnd;         // A0
        MegaBlockPage*     megaBlockPageList;       // A8
        MegaBlockPage*     currMegaBlockPageAlloc;  // B0
        std::int32_t       addressSpaceSize;        // B8
        std::int32_t       totalFreeBlockPages;     // BC
        std::uint32_t      usedRows;                // C0
        std::int32_t       totalAllocated;          // C4
        std::int32_t       totalFreeBlocks;         // C8
        std::int32_t       totalBlocks;             // CC
        bool               allowDecommits;          // D0
        std::uint8_t       padD1;                   // D1
        std::uint16_t      padD2;                   // D2
        std::uint32_t      padD4;                   // D4
    };
    static_assert(sizeof(bhkThreadMemorySource) == 0xD8);
}