Function trie_reload_data_head

modules/trie/trie.c:254–317

 */

static inline int trie_reload_data_head(struct head_db *hd,
                           str *part_name, int initial)
{
	trie_data_t *new_data;
	trie_data_t *old_data;
	time_t rawtime;
	MD5_CTX Md5Ctx;
	HASH bin_md5;
	FILE *fp=NULL;

	if (no_concurrent_reload) {
		lock_get( hd->ref_lock->lock );
		if (hd->ongoing_reload) {
			lock_release( hd->ref_lock->lock );
			LM_WARN("Reload already in progress, discarding this one\n");
			return -2;
		}
		hd->ongoing_reload = 1;
		lock_release( hd->ref_lock->lock );
	}

	LM_INFO("loading trie data in partition %.*s\n",part_name->len,part_name->s);
	MD5Init(&Md5Ctx);

	new_data = trie_load_info(hd, &Md5Ctx, fp);
	if ( new_data==0 ) {
		LM_CRIT("failed to load routing info\n");
		goto error;
	}

	lock_start_write( hd->ref_lock );

	/* no more activ readers -> do the swapping */
	old_data = hd->rdata;
	hd->rdata = new_data;
	/* update the time of the last reload for the current partition */
	time(&rawtime);

	hd->time_last_update = rawtime;

	MD5Final(bin_md5, &Md5Ctx);
	bin_hash_to_hex(bin_md5,hd->md5);

	lock_stop_write( (hd->ref_lock) );

	LM_INFO("loaded trie data in partition %.*s\n",part_name->len,part_name->s);

	/* destroy old data */
	if (old_data) {
		/* free old data */
		free_trie_data(old_data, hd->free);
	}
	LM_INFO("destroyed old trie data in partition %.*s\n",part_name->len,part_name->s);

	if (no_concurrent_reload)
		hd->ongoing_reload = 0;
	return 0;