avr-fw-modules/core/src/fifo_poll.c

#include <hwo/fifo.h>
#include <sys/atomic.h>

uint16_t fifo_poll(FIFO* fifo)
{
	ATOMIC
	if (fifo_avail(fifo)>0)
	{
		uint8_t r = fifo->pBuffer[ fifo->pRead++ ];
		if (fifo->pRead == fifo->size)
			fifo->pRead = 0;
		return r;
	};
	return -1;
};