ZeroOverheadHeap.h

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#pragma once
 
#include "RE/B/BSAtomic.h"
#include "RE/I/IMemoryHeap.h"
 
namespace RE
{
    class ZeroOverheadHeap : public IMemoryHeap
    {
    public:
        inline static constexpr auto RTTI = RTTI_ZeroOverheadHeap;
        inline static constexpr auto VTABLE = VTABLE_ZeroOverheadHeap;
 
        ~ZeroOverheadHeap() override;  // 00
 
        // override (IMemoryHeap)
        std::size_t   Size(const void* a_block) const override;                                      // 01
        void          GetMemoryStats(MemoryStats* a_stats) override;                                 // 02
        bool          ContainsBlockImpl(const void* a_block) const override;                         // 03
        void*         AllocateAlignImpl(std::size_t a_size, std::uint32_t a_alignment) override;     // 04
        const char*   GetName() const override;                                                      // 07 - { return name; }
        void*         Allocate(std::size_t a_size, std::uint32_t a_alignment) override;              // 08
        void          Deallocate(void* a_pointer, std::uint32_t) override;                           // 09 - { return; }
        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 - { return 0; }
        std::uint32_t GetPageSize() const override;                                                  // 0E - { return 0; }
 
        // members
        std::size_t        memSize;      // 08
        const char*        name;         // 10
        void*              memoryBase;   // 18
        void*              nextFreeMem;  // 20
        std::uint32_t      unk28;        // 28
        mutable BSSpinLock unk2C;        // 2C
        std::uint32_t      unk34;        // 34
    };
    static_assert(sizeof(ZeroOverheadHeap) == 0x38);
}