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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* CMetrics
* ========
* Copyright 2021-2022 The CMetrics Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <cmetrics/cmetrics.h>
#include <cmetrics/cmt_log.h>
#include <cmetrics/cmt_map.h>
#include <cmetrics/cmt_metric.h>
#include <cmetrics/cmt_counter.h>
struct cmt_counter *cmt_counter_create(struct cmt *cmt,
char *ns, char *subsystem,
char *name, char *help,
int label_count, char **label_keys)
{
int ret;
struct cmt_counter *counter;
if (!ns) {
cmt_log_error(cmt, "null ns not allowed");
return NULL;
}
if (!subsystem) {
cmt_log_error(cmt, "null subsystem not allowed");
return NULL;
}
if (!name || strlen(name) == 0) {
cmt_log_error(cmt, "undefined name");
return NULL;
}
if (!help || strlen(help) == 0) {
cmt_log_error(cmt, "undefined help");
return NULL;
}
counter = calloc(1, sizeof(struct cmt_counter));
if (!counter) {
cmt_errno();
return NULL;
}
cfl_list_add(&counter->_head, &cmt->counters);
ret = cmt_opts_init(&counter->opts, ns, subsystem, name, help);
if (ret == -1) {
cmt_log_error(cmt, "unable to initialize options for counter");
cmt_counter_destroy(counter);
return NULL;
}
/* Create the map */
counter->map = cmt_map_create(CMT_COUNTER, &counter->opts, label_count, label_keys,
(void *) counter);
if (!counter->map) {
cmt_log_error(cmt, "unable to allocate map for counter");
cmt_counter_destroy(counter);
return NULL;
}
/* set default counter aggregation type to cumulative */
counter->aggregation_type = CMT_AGGREGATION_TYPE_CUMULATIVE;
counter->cmt = cmt;
return counter;
}
void cmt_counter_allow_reset(struct cmt_counter *counter)
{
counter->allow_reset = 1;
}
int cmt_counter_destroy(struct cmt_counter *counter)
{
cfl_list_del(&counter->_head);
cmt_opts_exit(&counter->opts);
if (counter->map) {
cmt_map_destroy(counter->map);
}
free(counter);
return 0;
}
int cmt_counter_inc(struct cmt_counter *counter,
uint64_t timestamp,
int labels_count, char **label_vals)
{
struct cmt_metric *metric;
metric = cmt_map_metric_get(&counter->opts,
counter->map, labels_count, label_vals,
CMT_TRUE);
if (!metric) {
cmt_log_error(counter->cmt, "unable to retrieve metric: %s for counter %s_%s_%s",
counter->map, counter->opts.ns, counter->opts.subsystem,
counter->opts.name);
return -1;
}
cmt_metric_inc(metric, timestamp);
return 0;
}
int cmt_counter_add(struct cmt_counter *counter, uint64_t timestamp, double val,
int labels_count, char **label_vals)
{
struct cmt_metric *metric;
metric = cmt_map_metric_get(&counter->opts,
counter->map, labels_count, label_vals,
CMT_TRUE);
if (!metric) {
cmt_log_error(counter->cmt, "unable to retrieve metric: %s for counter %s_%s_%s",
counter->map, counter->opts.ns, counter->opts.subsystem,
counter->opts.name);
return -1;
}
cmt_metric_add(metric, timestamp, val);
return 0;
}
/* Set counter value, new value cannot be smaller than current value */
int cmt_counter_set(struct cmt_counter *counter, uint64_t timestamp, double val,
int labels_count, char **label_vals)
{
struct cmt_metric *metric;
metric = cmt_map_metric_get(&counter->opts, counter->map,
labels_count, label_vals,
CMT_TRUE);
if (!metric) {
cmt_log_error(counter->cmt, "unable to retrieve metric: %s for counter %s_%s_%s",
counter->map, counter->opts.ns, counter->opts.subsystem,
counter->opts.name);
return -1;
}
if (cmt_metric_get_value(metric) > val && counter->allow_reset == 0) {
cmt_log_error(counter->cmt, "attempting to reset unresetable counter: %s_%s_%s",
counter->opts.ns, counter->opts.subsystem,
counter->opts.name);
return -1;
}
cmt_metric_set(metric, timestamp, val);
return 0;
}
int cmt_counter_get_val(struct cmt_counter *counter,
int labels_count, char **label_vals, double *out_val)
{
int ret;
double val = 0;
ret = cmt_map_metric_get_val(&counter->opts,
counter->map, labels_count, label_vals,
&val);
if (ret == -1) {
cmt_log_error(counter->cmt, "unable to retrieve metric: %s for counter %s_%s_%s",
counter->map, counter->opts.ns, counter->opts.subsystem,
counter->opts.name);
return -1;
}
*out_val = val;
return 0;
}
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