circ_buf.h

 
#ifndef _CIRC_BUF_H_
#define _CIRC_BUF_H_
 
#include <stdint.h>



 
#define CIRC_BUF_SIZE 8  
 /* end of circbuf_config */


typedef struct {
    int16_t buffer[CIRC_BUF_SIZE];   
    uint16_t head;      
    uint16_t tail;      
} circ_buf_t;
 /* end of circbuf_types */


extern circ_buf_t g_rx_buffer;

extern circ_buf_t g_tx_buffer;
 /* end of circbuf_globals */


void circ_buf_init(circ_buf_t * const cb, uint16_t head, uint16_t tail);

uint8_t circ_buf_is_empty(circ_buf_t * const cb);

uint8_t circ_buf_is_full(circ_buf_t * const cb);

int8_t circ_buf_push(circ_buf_t * const cb, int16_t item);

int8_t circ_buf_pop(circ_buf_t * const cb, int16_t * const item);
 /* end of circbuf_functions */
 /* end of CircBuf */
 /* end of Shared */
 
#endif  /* _CIRC_BUF_H_ */