res_sorcery_config.c: Cleanup ao2 container usage idioms.

Change-Id: Iad24b335fb121a2bc7f1d048ab7420569edcba5a

res/res_sorcery_config.c

@@ -109,22 +109,6 @@ static void sorcery_config_destructor(void *obj)
 	ast_variables_destroy(config->criteria);
 }
 
-/*! \brief Hashing function for sorcery objects */
-static int sorcery_config_hash(const void *obj, const int flags)
-{
-	const char *id = obj;
-
-	return ast_str_hash(flags & OBJ_KEY ? id : ast_sorcery_object_get_id(obj));
-}
-
-/*! \brief Comparator function for sorcery objects */
-static int sorcery_config_cmp(void *obj, void *arg, int flags)
-{
-	const char *id = arg;
-
-	return !strcmp(ast_sorcery_object_get_id(obj), flags & OBJ_KEY ? id : ast_sorcery_object_get_id(arg)) ? CMP_MATCH | CMP_STOP : 0;
-}
-
 static int sorcery_config_fields_cmp(void *obj, void *arg, int flags)
 {
 	const struct sorcery_config_fields_cmp_params *params = arg;
@@ -145,14 +129,16 @@ static int sorcery_config_fields_cmp(void *obj, void *arg, int flags)
 		return 0;
 	}
 
+	/* We want this object */
 	if (params->container) {
+		/*
+		 * We are putting the found objects into the given container instead
+		 * of the normal container traversal return mechanism.
+		 */
 		ao2_link(params->container, obj);
-
-		/* As multiple objects are being returned keep going */
 		return 0;
 	} else {
-		/* Immediately stop and return, we only want a single object */
-		return CMP_MATCH | CMP_STOP;
+		return CMP_MATCH;
 	}
 }
 
@@ -179,7 +165,7 @@ static void *sorcery_config_retrieve_id(const struct ast_sorcery *sorcery, void
 	struct sorcery_config *config = data;
 	RAII_VAR(struct ao2_container *, objects, ao2_global_obj_ref(config->objects), ao2_cleanup);
 
-	return objects ? ao2_find(objects, id, OBJ_KEY) : NULL;
+	return objects ? ao2_find(objects, id, OBJ_SEARCH_KEY) : NULL;
 }
 
 static void sorcery_config_retrieve_multiple(const struct ast_sorcery *sorcery, void *data, const char *type, struct ao2_container *objects, const struct ast_variable *fields)
@@ -196,7 +182,7 @@ static void sorcery_config_retrieve_multiple(const struct ast_sorcery *sorcery,
 		return;
 	}
 
-	ao2_callback(config_objects, 0, sorcery_config_fields_cmp, &params);
+	ao2_callback(config_objects, OBJ_NODATA | OBJ_MULTIPLE, sorcery_config_fields_cmp, &params);
 }
 
 static void sorcery_config_retrieve_regex(const struct ast_sorcery *sorcery, void *data, const char *type, struct ao2_container *objects, const char *regex)
@@ -218,7 +204,7 @@ static void sorcery_config_retrieve_regex(const struct ast_sorcery *sorcery, voi
 		return;
 	}
 
-	ao2_callback(config_objects, 0, sorcery_config_fields_cmp, &params);
+	ao2_callback(config_objects, OBJ_NODATA | OBJ_MULTIPLE, sorcery_config_fields_cmp, &params);
 	regfree(&expression);
 }
 
@@ -280,8 +266,9 @@ static void sorcery_config_internal_load(void *data, const struct ast_sorcery *s
 	ast_debug(2, "Using bucket size of '%d' for objects of type '%s' from '%s'\n",
 		buckets, type, config->filename);
 
-	if (!(objects = ao2_container_alloc_options(AO2_ALLOC_OPT_LOCK_NOLOCK, buckets,
-		sorcery_config_hash, sorcery_config_cmp))) {
+	objects = ao2_container_alloc_hash(AO2_ALLOC_OPT_LOCK_NOLOCK, 0, buckets,
+		ast_sorcery_object_id_hash, NULL, ast_sorcery_object_id_compare);
+	if (!objects) {
 		ast_log(LOG_ERROR, "Could not create bucket for new objects from '%s', keeping existing objects\n",
 			config->filename);
 		ast_config_destroy(cfg);
@@ -300,8 +287,7 @@ static void sorcery_config_internal_load(void *data, const struct ast_sorcery *s
 		/*  Confirm an object with this id does not already exist in the bucket.
 		 *  If it exists, however, the configuration is invalid so stop
 		 *  processing and destroy it. */
-		obj = ao2_find(objects, id, OBJ_KEY);
-
+		obj = ao2_find(objects, id, OBJ_SEARCH_KEY);
 		if (obj) {
 			ast_log(LOG_ERROR, "Config file '%s' could not be loaded; configuration contains a duplicate object: '%s' of type '%s'\n",
 				config->filename, id, type);