CYBBlock.hpp

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#pragma once
namespace CYB {
    namespace Engine {
        namespace Memory {
            class Block {
            protected:
                enum : unsigned long long {
                    MAGIC_HEADER = 0x0123456789ABCDEF,
                    MAGIC_FOOTER = 0xFEDCBA9876543210,
                };

#ifdef DEBUG    //Block debug headers
            private:
                unsigned long long FMagicHeader; 
#endif
            public:
                Block* FNextFree;   
            private:
                unsigned int FSizeAndFreeBit, 
                    FOffsetToPreviousBlock; 
#ifdef DEBUG
                unsigned long long FMagicFooter; 
#endif
            private:
                static unsigned int InitializeData(const unsigned int ASize, const bool AFree) noexcept;    // <- It's an unsigned int for a reason dude

                unsigned int CalculateOffset(const Block& ABlock) noexcept;
            public:
                static Block& FromData(void* const AData);
                Block(const unsigned int ASpaceAvailable, const Block& ALeftBlock, const bool AFree) noexcept;
                Block(const Block&) = delete;
                void* GetData(void) noexcept;

                Block& RightBlock(void) noexcept;
                const Block& RightBlock(void) const noexcept;
                Block* LeftBlock(void) noexcept;

                void SetSize(const unsigned int ANewSize) noexcept;
                void SetFree(const bool ANewFree) noexcept;

                bool IsFree(void) const noexcept;
                unsigned int Size(void) const noexcept;

                bool IsLargeBlock(void) const noexcept;

                void Validate(void) const;

                Block& Splice(const unsigned int ASizeToKeep) noexcept;

                Block& EatLeftBlock(void) noexcept;
            };
        };
    };
};