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#ifndef FIFO_H
#define FIFO_H
#include <zeta.h>
#define FIFO_LEN 32
struct fifo {
u8 head;
u8 tail;
u8 data[FIFO_LEN];
};
static inline u8
fifo_pop(struct fifo *fifo)
{
u8 ret = fifo->data[fifo->head];
if (++fifo->head >= LENGTH(fifo->data))
fifo->head = 0;
return ret;
}
static inline void
fifo_push(struct fifo *fifo, u8 v)
{
fifo->data[fifo->tail] = v;
if (++fifo->tail >= LENGTH(fifo->data))
fifo->tail = 0;
}
static inline bool
fifo_empty(const struct fifo *fifo)
{
return (fifo->head == fifo->tail);
}
static inline void
fifo_clear(struct fifo *fifo)
{
fifo->head = 0;
fifo->tail = 0;
}
#endif // FIFO_H
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