460e2f86d7
Add prometheus_summary_observe_set() function to summary metric. Signed-off-by: Jukka Rissanen <jukka.rissanen@nordicsemi.no>
59 lines
1.0 KiB
C
59 lines
1.0 KiB
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/summary.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_summary, CONFIG_PROMETHEUS_LOG_LEVEL);
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int prometheus_summary_observe(struct prometheus_summary *summary, double value)
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{
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if (!summary) {
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return -EINVAL;
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}
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/* increment count */
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summary->count++;
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/* update sum */
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summary->sum += value;
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return 0;
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}
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int prometheus_summary_observe_set(struct prometheus_summary *summary,
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double value, unsigned long count)
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{
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unsigned long old_count;
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double old_sum;
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if (summary == NULL) {
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return -EINVAL;
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}
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if (value == summary->sum && count == summary->count) {
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return 0;
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}
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old_count = summary->count;
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if (count < old_count) {
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LOG_DBG("Cannot set summary count to a lower value");
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return -EINVAL;
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}
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summary->count += (count - old_count);
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old_sum = summary->sum;
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summary->sum += (value - old_sum);
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return 0;
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}
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