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#ifndef _RINGBUFFER_H
#define _RINGBUFFER_H
typedef struct RINGBUFFER
{
/* what you need */
struct RBITEM_t *next_alloc;
struct RBITEM_t *last_alloc;
struct RBITEM_t *first;
struct RBITEM_t *last;
void *memory;
int size;
} RINGBUFFER;
RINGBUFFER *ringbuf_init(void *memory, int size);
void *ringbuf_allocate(RINGBUFFER *rb, int size);
void ringbuf_validate(RINGBUFFER *rb);
void *ringbuf_item_ptr(void *p);
void *ringbuf_prev(RINGBUFFER *rb, void *current);
void *ringbuf_next(RINGBUFFER *rb, void *current);
void *ringbuf_first(RINGBUFFER *rb);
void *ringbuf_last(RINGBUFFER *rb);
#endif
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