#define MAX_SIZE 100


struct buffer_element {
}

struct ring_buffer {
	int consumer_ind;
	int producer_ind;
	buffer_element elements[MAX_SIZE];
}

struct ring_buffer buf;
buf.consumer_ind = 0
buf.producer_ind = 0

//rw_lock my_lock;

int write(buffer_element *element) {
	if (buf.producer_ind == (buf.consumer_ind - 1) % MAX_SIZE) {
		return -1
	}

	memcpy(&buf.elements[buf.producer_ind], element, sizeof(buffer_element))
	buf.producer_ind = buf.producer_ind == MAX_SIZE -1 ? 0 : buf.producer_ind + 1;

	return 0;
}


int read(buffer_element *element) {
	if (buf.producer_ind == buf.consumer_ind) {
		// no data
		return -1;
	}
	memcpy(element, &buf.elements[buf.consumer_ind], sizeof(buffer_element))
	buf.consumer_ind = buf.consumer_ind == MAX_SIZE -1 ? 0 : buf.consumer_ind + 1;
	return 0;
}