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#ifndef ENGINE_SHARED_RINGBUFFER_H
#define ENGINE_SHARED_RINGBUFFER_H
typedef struct RINGBUFFER RINGBUFFER;
class CRingBufferBase
{
class CItem
{
public:
CItem *m_pPrev;
CItem *m_pNext;
int m_Free;
int m_Size;
};
CItem *m_pProduce;
CItem *m_pConsume;
CItem *m_pFirst;
CItem *m_pLast;
void *m_pMemory;
int m_Size;
int m_Flags;
CItem *NextBlock(CItem *pItem);
CItem *PrevBlock(CItem *pItem);
CItem *MergeBack(CItem *pItem);
protected:
void *Allocate(int Size);
void *Prev(void *pCurrent);
void *Next(void *pCurrent);
void *First();
void *Last();
void Init(void *pMemory, int Size, int Flags);
int PopFirst();
public:
enum
{
// Will start to destroy items to try to fit the next one
FLAG_RECYCLE=1
};
};
template<typename T, int TSIZE, int TFLAGS=0>
class TStaticRingBuffer : public CRingBufferBase
{
unsigned char m_aBuffer[TSIZE];
public:
TStaticRingBuffer() { Init(); }
void Init() { CRingBufferBase::Init(m_aBuffer, TSIZE, TFLAGS); }
T *Allocate(int Size) { return (T*)CRingBufferBase::Allocate(Size); }
int PopFirst() { return CRingBufferBase::PopFirst(); }
T *Prev(T *pCurrent) { return (T*)CRingBufferBase::Prev(pCurrent); }
T *Next(T *pCurrent) { return (T*)CRingBufferBase::Next(pCurrent); }
T *First() { return (T*)CRingBufferBase::First(); }
T *Last() { return (T*)CRingBufferBase::Last(); }
};
#endif
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