static void make_room()

in ncrx/libncrx.c [352:378]

• 17 lines of code
• 3 McCabe index (conditional complexity)

static void make_room(struct ncrx *ncrx, int delta)
{
	int i;

	/* head_seq is for the next msg, need to advance for 0 @delta too */
	for (i = 0; i <= delta; i++) {
		struct ncrx_slot *slot;
		int max_busy = ncrx->p.nr_slots - ncrx->p.retx_stride;

		/* a new slot is considered hole until it gets completed */
		slot = &ncrx->slots[ncrx->head];
		assert(slot_is_free(slot));
		list_append(&slot->hole_node, &ncrx->hole_list);
		slot->timestamp = ncrx->now_mono;
		slot->retx_timestamp = 0;

		/*
		 * Wind the ring buffer and push out if overflowed.  Always
		 * keep at least one stride empty so that retransmissions
		 * of expired slots don't count as oos.
		 */
		ncrx->head_seq++;
		ncrx->head = (ncrx->head + 1) % ncrx->p.nr_slots;
		if (slot_dist(ncrx->tail, ncrx) > max_busy)
			retire_tail(ncrx);
	}
}