2 * collectd - src/utils_threshold.c
3 * Copyright (C) 2014 Pierre-Yves Ritschard
5 * Permission is hereby granted, free of charge, to any person obtaining a
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
13 * all copies or substantial portions of the Software.
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>
29 #include "utils_avltree.h"
30 #include "utils_threshold.h"
37 c_avl_tree_t *threshold_tree = NULL;
38 pthread_mutex_t threshold_lock = PTHREAD_MUTEX_INITIALIZER;
42 * threshold_t *threshold_get
44 * Retrieve one specific threshold configuration. For looking up a threshold
45 * matching a value_list_t, see "threshold_search" below. Returns NULL if the
46 * specified threshold doesn't exist.
48 threshold_t *threshold_get (const char *hostname,
49 const char *plugin, const char *plugin_instance,
50 const char *type, const char *type_instance)
52 char name[6 * DATA_MAX_NAME_LEN];
53 threshold_t *th = NULL;
55 format_name (name, sizeof (name),
56 (hostname == NULL) ? "" : hostname,
57 (plugin == NULL) ? "" : plugin, plugin_instance,
58 (type == NULL) ? "" : type, type_instance);
59 name[sizeof (name) - 1] = '\0';
61 if (c_avl_get (threshold_tree, name, (void *) &th) == 0)
65 } /* }}} threshold_t *threshold_get */
68 * threshold_t *threshold_search
70 * Searches for a threshold configuration using all the possible variations of
71 * "Host", "Plugin" and "Type" blocks. Returns NULL if no threshold could be
73 * XXX: This is likely the least efficient function in collectd.
75 threshold_t *threshold_search (const value_list_t *vl)
79 if ((th = threshold_get (vl->host, vl->plugin, vl->plugin_instance,
80 vl->type, vl->type_instance)) != NULL)
82 else if ((th = threshold_get (vl->host, vl->plugin, vl->plugin_instance,
83 vl->type, NULL)) != NULL)
85 else if ((th = threshold_get (vl->host, vl->plugin, NULL,
86 vl->type, vl->type_instance)) != NULL)
88 else if ((th = threshold_get (vl->host, vl->plugin, NULL,
89 vl->type, NULL)) != NULL)
91 else if ((th = threshold_get (vl->host, "", NULL,
92 vl->type, vl->type_instance)) != NULL)
94 else if ((th = threshold_get (vl->host, "", NULL,
95 vl->type, NULL)) != NULL)
97 else if ((th = threshold_get ("", vl->plugin, vl->plugin_instance,
98 vl->type, vl->type_instance)) != NULL)
100 else if ((th = threshold_get ("", vl->plugin, vl->plugin_instance,
101 vl->type, NULL)) != NULL)
103 else if ((th = threshold_get ("", vl->plugin, NULL,
104 vl->type, vl->type_instance)) != NULL)
106 else if ((th = threshold_get ("", vl->plugin, NULL,
107 vl->type, NULL)) != NULL)
109 else if ((th = threshold_get ("", "", NULL,
110 vl->type, vl->type_instance)) != NULL)
112 else if ((th = threshold_get ("", "", NULL,
113 vl->type, NULL)) != NULL)
117 } /* }}} threshold_t *threshold_search */
119 int ut_search_threshold (const value_list_t *vl, /* {{{ */
120 threshold_t *ret_threshold)
127 /* Is this lock really necessary? */
128 pthread_mutex_lock (&threshold_lock);
129 t = threshold_search (vl);
131 pthread_mutex_unlock (&threshold_lock);
135 memcpy (ret_threshold, t, sizeof (*ret_threshold));
136 pthread_mutex_unlock (&threshold_lock);
138 ret_threshold->next = NULL;
141 } /* }}} int ut_search_threshold */