File syn_pingpong.h

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#ifndef SYN_PINGPONG_H
#define SYN_PINGPONG_H

#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

typedef struct {
    uint8_t *buf[2];          
    size_t size;              
    uint8_t active_idx;       
    volatile bool data_ready; 
} SYN_PingPong;

static inline void syn_pingpong_init(SYN_PingPong *pp, uint8_t *buf_a, uint8_t *buf_b, size_t size)
{
    pp->buf[0] = buf_a;
    pp->buf[1] = buf_b;
    pp->size = size;
    pp->active_idx = 0;
    pp->data_ready = false;
}

static inline uint8_t *syn_pingpong_active(const SYN_PingPong *pp)
{
    return pp->buf[pp->active_idx];
}

static inline uint8_t *syn_pingpong_ready_buf(const SYN_PingPong *pp)
{
    return pp->buf[1 - pp->active_idx];
}

static inline bool syn_pingpong_ready(const SYN_PingPong *pp)
{
    return pp->data_ready;
}

static inline void syn_pingpong_swap(SYN_PingPong *pp)
{
    pp->active_idx = (uint8_t)(1 - pp->active_idx);
    pp->data_ready = true;
}

static inline void syn_pingpong_consume(SYN_PingPong *pp)
{
    pp->data_ready = false;
}

static inline size_t syn_pingpong_size(const SYN_PingPong *pp)
{
    return pp->size;
}

#ifdef __cplusplus
}
#endif

#endif /* SYN_PINGPONG_H */