d482e3ddfc
The library provides Prometheus metrics types, collector and exposion formatter. The library isn't thread-safe for now. The next first pull request will support that. Can be use exposion formatted output with Zephyr Http server. Signed-off-by: Mustafa Abdullah Kus <mustafa.kus@sparsetechnology.com>
44 lines
913 B
C
44 lines
913 B
C
/*
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* Copyright (c) 2024 Mustafa Abdullah Kus, Sparse Technology
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/net/prometheus/histogram.h>
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#include <stdlib.h>
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#include <string.h>
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#include <zephyr/kernel.h>
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#include <zephyr/logging/log.h>
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LOG_MODULE_REGISTER(pm_histogram, CONFIG_PROMETHEUS_LOG_LEVEL);
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int prometheus_histogram_observe(struct prometheus_histogram *histogram, double value)
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{
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if (!histogram) {
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return -EINVAL;
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}
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/* increment count */
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histogram->count++;
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/* update sum */
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histogram->sum += value;
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/* find appropriate bucket */
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for (size_t i = 0; i < histogram->num_buckets; ++i) {
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if (value <= histogram->buckets[i].upper_bound) {
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/* increment count for the bucket */
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histogram->buckets[i].count++;
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LOG_DBG("value: %f, bucket: %f, count: %lu", value,
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histogram->buckets[i].upper_bound, histogram->buckets[i].count);
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break;
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}
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}
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return 0;
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}
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