Function tcp_pcap_take_cluster_reference

freebsd/netinet/tcp_pcap.c:103–112

* If we are below the maximum allowed cluster references, * increment the reference count and return TRUE. Otherwise, * leave the reference count alone and return FALSE. */

 * leave the reference count alone and return FALSE.
 */
static __inline bool
tcp_pcap_take_cluster_reference(void)
{
	if (atomic_fetchadd_int(&tcp_pcap_clusters_referenced_cur, 1) >=
		tcp_pcap_clusters_referenced_max) {
		atomic_add_int(&tcp_pcap_clusters_referenced_cur, -1);
		return FALSE;
	}
	return TRUE;
}

/*
 * For all the external entries in m, apply the given adjustment.