/**
* Create a new callout queue subordinate to another.
*
* @param name the name of the subqueue
* @param parent the parent callout queue
* @param period period between heartbeats, in ms
*
* @return a new callout queue
*/
cqueue_t *
cq_submake(const char *name, cqueue_t *parent, int period)
{
struct csubqueue *csq;
WALLOC0(csq);
cq_initialize(&csq->sub_cq, name, parent->cq_time, period);
csq->sub_cq.cq_magic = CSUBQUEUE_MAGIC;
csq->heartbeat = cq_periodic_add(parent, period,
cq_heartbeat_trampoline, &csq->sub_cq);
csubqueue_check(csq);
cqueue_check(&csq->sub_cq);
return &csq->sub_cq;
}
/**
* Initialize the DHT publisher.
*/
void G_COLD
publisher_init(void)
{
size_t i;
dbstore_kv_t kv = { SHA1_RAW_SIZE, NULL, sizeof(struct pubdata), 0 };
dbstore_packing_t packing =
{ serialize_pubdata, deserialize_pubdata, NULL };
publish_cq = cq_main_submake("publisher", PUBLISHER_CALLOUT);
publisher_sha1 = hikset_create(
offsetof(struct publisher_entry, sha1), HASH_KEY_FIXED, SHA1_RAW_SIZE);
db_pubdata = dbstore_open(db_pubdata_what, settings_dht_db_dir(),
db_pubdata_base, kv, packing, PUBLISH_DB_CACHE_SIZE,
sha1_hash, sha1_eq, GNET_PROPERTY(dht_storage_in_memory));
cq_periodic_add(publish_cq, PUBLISH_SYNC_PERIOD, publisher_sync, NULL);
for (i = 0; i < N_ITEMS(inverse_decimation); i++) {
double n = i + 1.0;
double v = log(n / KDA_K);
inverse_decimation[i] = 1.0 / (1.0 + v * v);
if (GNET_PROPERTY(publisher_debug) > 4) {
g_debug("PUBLISHER inverse_decimation[%zu] = %g",
i, inverse_decimation[i]);
}
}
for (i = 0; i < N_ITEMS(inverse_decimation); i++) {
if (inverse_decimation[i] >= PUBLISH_MIN_DECIMATION) {
publisher_minimum = i + 1;
break;
}
}
g_assert(publisher_minimum > 0);
if (GNET_PROPERTY(publisher_debug)) {
g_debug("PUBLISHER minimum amount of nodes we accept: %u",
publisher_minimum);
}
publisher_trim_pubdata();
}
/**
* Convenience routine: insert periodic event in the main callout queue.
*
* Same as calling:
*
* cq_periodic_add(cq_main(), period, event, arg);
*
* only it is shorter.
*/
cperiodic_t *
cq_periodic_main_add(int period, cq_invoke_t event, void *arg)
{
cq_main_init();
return cq_periodic_add(callout_queue, period, event, arg);
}
