ring_buffer_pulse.h

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#ifndef _PULSE_BUFFER_H_
#define _PULSE_BUFFER_H_

#include "hal_types.h"
#include "pwm_in.h"

#ifdef __cplusplus
  extern "C" {
#endif

typedef struct Pulse_buffer {
    Pulse *buf;               
    uint16_t head;            
    volatile uint16_t tail;   
    uint16_t size;            
} pulse_buffer;



static inline void pb_init(volatile pulse_buffer *pb, uint16_t size, Pulse *buf) {
    pb->head = 0;
    pb->tail = 0;
    pb->size = size - 1;
    pb->buf = buf;
}

static inline uint16_t pb_full_count(volatile pulse_buffer *pb) {
    uint16_t h=pb->head;
    uint16_t t=pb->tail;
    int32_t size = t - h;
    if (t < h) {
        size += pb->size + 1;
    }
    return (uint16_t)size;
}

static inline int pb_is_full(volatile pulse_buffer *pb) {
    uint16_t t = pb->tail;
    uint16_t h = pb->head;
    return (t + 1 == h) || (t == pb->size && h == 0);
}

static inline int pb_is_empty(volatile pulse_buffer *pb) {
    bool ret=pb->head == pb->tail;
    return ret;
}

static inline void pb_insert(volatile pulse_buffer *pb, Pulse element) { 
    uint16_t t = pb->tail;
    pb->buf[t] = element;
    pb->tail = (t == pb->size) ? 0 : t + 1;
}

static inline Pulse pb_remove(volatile pulse_buffer *pb) {
    uint16_t h = pb->head;
    Pulse p = pb->buf[h];
    pb->head = (h == pb->size) ? 0 : h + 1;
    return p;
}

static inline int pb_safe_insert(volatile pulse_buffer *pb, Pulse element) {
    if (pb_is_full(pb)) {
        return 0;
    }
    pb_insert(pb, element);
    return 1;
}


static inline void pb_reset(volatile pulse_buffer *pb) {
    pb->tail = pb->head;
}

#ifdef __cplusplus
  }
#endif

#endif