Function find_unconnected_slot

src/fe_utils/parallel_slot.c:160–175

* Return the offset of the first slot without a database connection, or -1 if * all slots are connected. */

 * all slots are connected.
 */
static int
find_unconnected_slot(const ParallelSlotArray *sa)
{
	int			i;

	for (i = 0; i < sa->numslots; i++)
	{
		if (sa->slots[i].inUse)
			continue;

		if (sa->slots[i].connection == NULL)
			return i;
	}

	return -1;
}

/*
 * Return the offset of the first idle slot, or -1 if all slots are busy.