2 * collectd - src/match_empty_counter.c
3 * Copyright (C) 2009 Florian Forster
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
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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
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17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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21 * DEALINGS IN THE SOFTWARE.
24 * Florian Forster <octo at collectd.org>
29 #include "filter_chain.h"
35 typedef struct mec_match_s mec_match_t;
42 * internal helper functions
44 static int mec_create (const oconfig_item_t *ci, void **user_data) /* {{{ */
48 m = calloc (1, sizeof (*m));
51 ERROR ("mec_create: calloc failed.");
55 if (ci->children_num != 0)
57 ERROR ("empty_counter match: This match does not take any additional "
63 } /* }}} int mec_create */
65 static int mec_destroy (void **user_data) /* {{{ */
67 if (user_data != NULL)
73 } /* }}} int mec_destroy */
75 static int mec_match (const data_set_t __attribute__((unused)) *ds, /* {{{ */
76 const value_list_t *vl,
77 notification_meta_t __attribute__((unused)) **meta, void **user_data)
83 if ((user_data == NULL) || (*user_data == NULL))
90 for (i = 0; i < ds->ds_num; i++)
92 if (ds->ds[i].type != DS_TYPE_COUNTER)
96 if (vl->values[i].counter == 0)
100 if (num_counters == 0)
101 return (FC_MATCH_NO_MATCH);
102 else if (num_counters == num_empty)
103 return (FC_MATCH_MATCHES);
105 return (FC_MATCH_NO_MATCH);
106 } /* }}} int mec_match */
108 void module_register (void)
112 memset (&mproc, 0, sizeof (mproc));
113 mproc.create = mec_create;
114 mproc.destroy = mec_destroy;
115 mproc.match = mec_match;
116 fc_register_match ("empty_counter", mproc);
117 } /* module_register */
119 /* vim: set sw=2 sts=2 tw=78 et fdm=marker : */