#pragma once

#include <sys/atomic.h>
#include <sys/errno.h>

#include <stdint.h>

typedef struct {
	uint16_t	size;
	uint16_t	pos;
	uint8_t		*buffer;
} buffer_t;

static inline int buffer_set(buffer_t *buffer,void *mem,int size){
	if (buffer){
		ATOMIC
		
		buffer->buffer	= mem;
		buffer->pos		= 0;
		buffer->size	= size;
		return ESUCCESS;
	};
	return -ENULLPTR;
};

static inline int buffer_pos(buffer_t *buffer){
	ATOMIC
	
	return (buffer) ? buffer->pos : -ENULLPTR;
};

static inline int buffer_free(buffer_t *buffer){
	ATOMIC
	
	return (buffer) ? (buffer->size - buffer->pos) : -ENULLPTR;
};

#define buffer_byte(b)		((b)->buffer[(b)->pos++])