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90 lines
3.3 KiB
90 lines
3.3 KiB
/*
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** Zabbix
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** Copyright (C) 2001-2023 Zabbix SIA
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation; either version 2 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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**/
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#ifndef ZABBIX_ZBXTRENDS_H
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#define ZABBIX_ZBXTRENDS_H
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#include "zbxeval.h"
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#include "zbxtime.h"
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/* value_avg_t structure is used for item average value trend calculations. */
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/* */
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/* For double values the average value is calculated on the fly with the */
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/* following formula: avg = (dbl * count + value) / (count + 1) and stored */
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/* into dbl member. */
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/* For uint64 values the item values are summed into ui64 member and the */
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/* average value is calculated before flushing trends to database: */
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/* avg = ui64 / count */
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typedef union
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{
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double dbl;
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zbx_uint128_t ui64;
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}
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zbx_value_avg_t;
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typedef struct
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{
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zbx_uint64_t itemid;
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zbx_history_value_t value_min;
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zbx_value_avg_t value_avg;
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zbx_history_value_t value_max;
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int clock;
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int num;
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int disable_from;
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unsigned char value_type;
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}
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ZBX_DC_TREND;
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int zbx_trends_parse_base(const char *params, zbx_time_unit_t *base, char **error);
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int zbx_trends_parse_timeshift(time_t from, const char *timeshift, struct tm *tm, char **error);
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int zbx_trends_parse_range(time_t from, const char *param, time_t *start, time_t *end, char **error);
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int zbx_trends_parse_nextcheck(time_t from, const char *period_shift, time_t *nextcheck, char **error);
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int zbx_trends_eval_avg(const char *table, zbx_uint64_t itemid, time_t start, time_t end, double *value,
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char **error);
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int zbx_trends_eval_count(const char *table, zbx_uint64_t itemid, time_t start, time_t end, double *value,
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char **error);
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int zbx_trends_eval_max(const char *table, zbx_uint64_t itemid, time_t start, time_t end, double *value,
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char **error);
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int zbx_trends_eval_min(const char *table, zbx_uint64_t itemid, time_t start, time_t end, double *value,
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char **error);
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int zbx_trends_eval_sum(const char *table, zbx_uint64_t itemid, time_t start, time_t end, double *value,
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char **error);
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/* trends function cache */
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typedef struct
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{
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zbx_uint64_t hits;
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zbx_uint64_t misses;
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zbx_uint64_t items_num;
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zbx_uint64_t requests_num;
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}
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zbx_tfc_stats_t;
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int zbx_tfc_init(zbx_uint64_t cache_size, char **error);
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void zbx_tfc_destroy(void);
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int zbx_tfc_get_stats(zbx_tfc_stats_t *stats, char **error);
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void zbx_tfc_invalidate_trends(ZBX_DC_TREND *trends, int trends_num);
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int zbx_baseline_get_data(zbx_uint64_t itemid, unsigned char value_type, time_t now, const char *period,
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int season_num, zbx_time_unit_t season_unit, int skip, zbx_vector_dbl_t *values,
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zbx_vector_uint64_t *index, char **error);
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#endif
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