2 * collectd - src/utils_threshold.c
3 * Copyright (C) 2014 Pierre-Yves Ritschard
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6 * copy of this software and associated documentation files (the "Software"),
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10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
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15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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24 * Pierre-Yves Ritschard <pyr at spootnik.org>
30 #include "utils_avltree.h"
31 #include "utils_threshold.h"
38 c_avl_tree_t *threshold_tree = NULL;
39 pthread_mutex_t threshold_lock = PTHREAD_MUTEX_INITIALIZER;
43 * threshold_t *threshold_get
45 * Retrieve one specific threshold configuration. For looking up a threshold
46 * matching a value_list_t, see "threshold_search" below. Returns NULL if the
47 * specified threshold doesn't exist.
49 threshold_t *threshold_get(const char *hostname, const char *plugin,
50 const char *plugin_instance, const char *type,
51 const char *type_instance) { /* {{{ */
52 char name[6 * DATA_MAX_NAME_LEN];
53 threshold_t *th = NULL;
55 format_name(name, sizeof(name), (hostname == NULL) ? "" : hostname,
56 (plugin == NULL) ? "" : plugin, plugin_instance,
57 (type == NULL) ? "" : type, type_instance);
58 name[sizeof(name) - 1] = '\0';
60 if (c_avl_get(threshold_tree, name, (void *)&th) == 0)
64 } /* }}} threshold_t *threshold_get */
67 * threshold_t *threshold_search
69 * Searches for a threshold configuration using all the possible variations of
70 * "Host", "Plugin" and "Type" blocks. Returns NULL if no threshold could be
72 * XXX: This is likely the least efficient function in collectd.
74 threshold_t *threshold_search(const value_list_t *vl) { /* {{{ */
77 if ((th = threshold_get(vl->host, vl->plugin, vl->plugin_instance, vl->type,
78 vl->type_instance)) != NULL)
80 else if ((th = threshold_get(vl->host, vl->plugin, vl->plugin_instance,
81 vl->type, NULL)) != NULL)
83 else if ((th = threshold_get(vl->host, vl->plugin, NULL, vl->type,
84 vl->type_instance)) != NULL)
86 else if ((th = threshold_get(vl->host, vl->plugin, NULL, vl->type, NULL)) !=
89 else if ((th = threshold_get(vl->host, "", NULL, vl->type,
90 vl->type_instance)) != NULL)
92 else if ((th = threshold_get(vl->host, "", NULL, vl->type, NULL)) != NULL)
94 else if ((th = threshold_get("", vl->plugin, vl->plugin_instance, vl->type,
95 vl->type_instance)) != NULL)
97 else if ((th = threshold_get("", vl->plugin, vl->plugin_instance, vl->type,
100 else if ((th = threshold_get("", vl->plugin, NULL, vl->type,
101 vl->type_instance)) != NULL)
103 else if ((th = threshold_get("", vl->plugin, NULL, vl->type, NULL)) != NULL)
105 else if ((th = threshold_get("", "", NULL, vl->type, vl->type_instance)) !=
108 else if ((th = threshold_get("", "", NULL, vl->type, NULL)) != NULL)
112 } /* }}} threshold_t *threshold_search */
114 int ut_search_threshold(const value_list_t *vl, /* {{{ */
115 threshold_t *ret_threshold) {
121 /* Is this lock really necessary? */
122 pthread_mutex_lock(&threshold_lock);
123 t = threshold_search(vl);
125 pthread_mutex_unlock(&threshold_lock);
129 memcpy(ret_threshold, t, sizeof(*ret_threshold));
130 pthread_mutex_unlock(&threshold_lock);
132 ret_threshold->next = NULL;
135 } /* }}} int ut_search_threshold */